Patent Abstract:
A polycarbonate resin composition having improved chemical resistance and solvent resistance while maintaining the impact resistance, heat resistance, thermal stability, and the like inherent to the polycarbonate resin which comprises 100 parts by weight of polycarbonate resin and 0.01 to 20 parts by weight of a specific alkyl ketene dimer, and inhibits problems such as cracking, and the like, even when solvents or various chemicals such as hand creams and detergents adhere to the molded article obtained from the resin composition.

Full Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a polycarbonate resin composition, and more particularly, a polycarbonate resin composition which has improved chemical resistance and solvent resistance while retaining, the characteristics of polycarbonate resin of impact resistance, heat resistance, thermal stability and so forth. 
       BACKGROUND OF INVENTION 
       [0002]    Polycarbonate resin is a thermoplastic resin that has excellent impact resistance, heat resistance, thermal stability and so forth, and is widely used in the fields of electrical products. electronics, ITE, machinery, automobiles and so forth. However, problems such as cracking sometimes occur due to solvents or various chemicals such as hand creams and detergents adhering to molded products obtained from polycarbonate resin, and a polycarbonate resin having excellent chemical resistance and solvent resistance is desired so that these problems do not occur. On the other hand, the alkyl ketene dimers used in the present invention are well known in the paper manufacturing industry as neutral sizing agents that prevent bleeding of ink Japanese Unexamined Patent Application Publication No. 2004-225212 incorporated herein by reference in its entirety for all purposes, and they bond with cellulose at the papermaking stage to produce a sizing effect. In applications other than paper, for example, reinforcing materials such as calcium carbonate used in resin is surface-treated with alkyl ketene dimers Japanese Unexamined Patent Application Publication No, H6-107939 incorporated herein by reference in its entirety for all purposes. It is also known that the hydrolysis resistance and thermal stability of polycarbonate resin can be improved by blending certain phosphorus compounds in polycarbonate resin Japanese Unexamined Patent Application Publication No 2002-69285 incorporated herein by reference in its entirety for all purposes. Additionally, it is known that the rubber-reinforced styrene resin used in the present invention can improve moldability and impact strength of polycarbonate resin when blended in polycarbonate resin Japanese Unexamined Patent Application Publication No. S38-15225 and Japanese Unexamined Patent Application Public won No. H4-110345 incorporated herein by reference in their entirety for all purposes 
         [0003]    An objective of the present invention is to provide a polycarbonate resin that has improved chemical resistance and solvent resistance as well as hydrolysis resistance while retaining the original characteristics of polycarbonate resin of impact resistance, heat resistance, thermal stability and so forth. Furthermore, rubber-reinforced styrene resin is sometimes blended in polycarbonate resin to improve the moldability and impact strength of the polycarbonate resin. When paint is applied to a molded product obtained from such blends, problems such as cracking due to chemicals and solvents such as thinners used in paint sometimes occur, and a resin composition made of a blend having excellent chemical resistance and solvent resistance is desired so that these problems do not occur, Another objective of the present invention is to provide a resin composition made of a polycarbonate resin/rubber-reinforced styrene resin having excellent chemical resistance and solvent resistance. 
       SUMMARY OF THE INVENTION 
       [0004]    It has been discovered that chemical resistance and solvent resistance can be improved by blending certain alkyl ketene dimers in polycarbonate resin, and thereby achieved the present invention. 
         [0005]    That is, the present invention is a polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin (A) and 0.01-20 parts by weight of an alkyl ketene dimer (B) represented by General formula 1: 
         [0000]    
       
                 
         
             
             
         
       
     
         [0006]    wherein R 1  and R 2  each independently represent an alkyl group having 6-33 carbons. 
         [0007]    The polycarbonate resin composition of the present invention has improved chemical resistance and solvent resistance while retaining the original properties of polycarbonate resin of impact resistance, heat resistance, thermal stability and so forth, and it suppresses the occurrence of problems such as cracking even if solvents and various chemicals such as hand creams and detergents adhere to a molded product obtained from this resin composition. 
     
    
     
       BRIEF DESCRIPTION OF FIGURE 
         [0008]      FIG. 1  shows a cantilever chemical resistance test jig Used to perform testing in the Examples 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0009]    Polycarbonate resin (A) used in the present invention is a polymer obtained by the phosgene technique, in which various dihydroxydiaryl compounds and phosgene are reacted, or by the ester exchange technique, in which a dihydroxydiaryl compound and a carbonate such as diphenyl carbonate are reacted, A typical polycarbonate resin is that produced from 2,2-bis(4-hydroxyphenyl) propane (common name: bisphenol A). 
         [0010]    Examples of the aforementioned dihydroxydiaryl compound include, in addition to bisphenol A, bis(hydroxyaryl)alkanes like bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)propane, bis(4-hydroxyphenyl)phenylmethane, 2,2-bis(4-hydroxyphenyl-3-methylphenyl)propane, 1,1-bis(4-hydroxy-3-tertiary butylphenyl)propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane and 2,2-bis(4-hydroxy-3 ,5-dichlorophenyl)propane; bis(hydroxyaryl)cycloalkanes like 1,1-bis(4-hydroxyphenyl)cyclopentane and 1,1-bis(4-hydroxyphenyl)cyclohexane; dihydroxydiaryl ethers like 4,4′-dihydroxydiphenyl ether and 4,4′-dihydroxy-3,3′-dimethyl diphenyl ether; dihydroxydiaryl sulfides like 4,4′-dihydroxy diphenyl sulfide; dihydroxydiaryl sulfoxides like 4,4′-dihydroxy diphenyl sulfoxide and 4,4-dihydroxy-3,3′-dimethyl diphenyl sulfoxide; and dihydroxydiaryl sulfones like 4,4′-dihydroxy diphenyl sulfone and 4,4′-dihydroxy-3,3′-dimethyl diphenyl sulfone. These may be used singly or in a mixture of two or more types, but additionally, piperazine, dipiperidyl hydroquinone, resorcin, 4,4′-dihydroxydiphenyl and so forth may be used in a mixture. 
         [0011]    Additionally, the aforementioned dihydroxyaryl compounds and the trivalent and higher phenol compounds shown below may be used as a mixture. Examples of trivalent and higher phenols include phloroglucin, 4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptene, 2,4,6-dimethyl-2,4,6-tri-(4-hydroxyphenyl)-heptane, 1,3,5-tri-(4-hydoxyphenyl)-benzole, 1,1,1-tri-(4-hydroxyphenyl)-ethane and 2,2-bis-[4,4-(4,4′-dihydroxydiphenyl)-cyclohexyl]-propane. 
         [0012]    The viscosity-average molecular weight of polycarbonate resin (A) is not particularly limited, but from the viewpoints of moldability and strength, it is normally in the range of 10,000-100,000, preferably 14,000-30.000. and more preferably 16,000-26,000. Furthermore, molecular weight modifiers, catalysts and so forth may be used as necessary when producing such a polycarbonate resin. 
         [0013]    Alkyl ketene dimer (B) used in the present invention is a compound represented by General formula 1: 
         [0000]    
       
                 
         
             
             
         
       
     
         [0000]    In general formula 1, R 1  and R 2  each independently represent an alkyl group having 6-33 carbons, and preferably an alkyl group having 10-21 carbons. 
         [0014]    Examples of rubber-reinforced styrene resin (C) used in the present invention include acrylonitrile-butadiene-styrene copolymer (ABS resin), high-impact-polystyrene resin (HIPS) and methylmethacrylate-butadiene-styrene copolymer (NIBS resin). Preferred examples of rubber-reinforced styrene resin (C) are those that contain a graft copolymer obtained by graft copolymerization of an aromatic vinyl monomer and a vinyl cyanide monomer component in the presence of a rubber-like polymer. A particularly preferred substance is ABS resin produced by bulk polymerization. 
         [0015]    Phosphorus-based antioxidant (D) used in the present invention is one or two or more compounds selected from compounds represented by general formulas 2 through 4 (D-1 through D-3) below. 
         [0000]    
       
                 
         
             
             
         
       
     
         [0000]    In general formula 2, R 3  through R 6  each independently represent an alkyl group having 1-20 carbons, or an aryl group optionally substituted with an alkyl group. 
         [0000]    
       
                 
         
             
             
         
       
     
         [0000]    In general formula 3, R 7  and R 8  each independently represent an alkyl group having 1-20 carbons, or an aryl group optionally substituted with an alkyl group. 
         [0000]    
       
                 
         
             
             
         
       
     
         [0000]    In general formula 4, R 9  represents an alkyl group having 1-20 carbons, or an aryl group optionally substituted with an alkyl group; a represents an integer from 0 to 3. As compound D-3, tris(2,4-di-t-butylphenyl)phosphite, which is commercially available as Irgafos P168 made by Ciba Specialty Chemicals, may be advantageously used. As a mixture of compounds D-1 through D-3, Sandostab P-EPQ made by Clariant Japan, having a main ingredient of tetrakis(2,4-di-t-butylphenyl)-4,4′-biphenylene phosphonite, is commercially available and may be advantageously used. 
         [0016]    The blended quantity of alkyl ketene dimer (B) in the polycarbonate resin composition of the present invention is 0.01-20 parts by weight for 100 parts by weight of 
         [0000]    polycarbonate resin (A). If it is less than 0.01 parts by weight, it is undesirable because chemical resistance and solvent resistance are poor, and if greater than 20 parts by weight, it is undesirable because granulation processing becomes difficult and pellets of the resin composition cannot be obtained. The preferred blended quantity is 0.01-10 parts by weight, and 0.3-5 parts by weight is even more preferable. The blended quantity of rubber-reinforced styrene resin (C) is 5-60 wt % of the total quantity of polycarbonate resin (A) and rubber-reinforced styrene resin (C). If this blended quantity is less than 5%, it is undesirable because moldability is poor, and if greater than 60 wt %, it is undesirable because heat resistance decreases. The preferred blended quantity is 10-50 wt %, and 30-50 wt % is even more preferable. The blended quantity of phosphorus-based antioxidant (D) is preferably 0.006-0.12 parts by weight for 100 parts by weight of polycarbonate resin (A), if it is less than 0.006 parts by weight, it is undesirable because thermal stability and hydrolysis resistance are poor, and if greater than 0.12 parts by weight, it is undesirable because hydrolysis resistance is poor. The preferred blended quantity is 0.01-0.1 parts by weight, and 0.06-0.1 parts by weight is even more preferable. 
         [0017]    The method for blending the various blended components (A) through (D) of the present invention is not particularly limited. They can be mixed using any mixer, such as a tumbler, ribbon blender, high-speed mixer or the like, or they can be melt-kneaded with an ordinary uniaxial or biaxial extruder. Furthermore, the order of blending of these blended components is not particularly limited, nor is the use of batch mixing or divided mixing. When mixing, other known additives, such as mold release agents, UV absorbents, antistatic agents, antioxidants, thermal stabilizers, dyes and pigments, spreading agents (epoxy soy bean oil, liquid paraffin, etc.), reinforcing materials (glass fibers, carbon fibers, talc, mica, etc.), or other resins, may be blended as necessary. Examples of UV absorbents include various UV absorbents that are benzotriazole-based, triazine-based or benzophenone-based compounds. One type may be used or two or More types may be used together. Above all, benzotriazole-based compounds may be advantageously used. The blended quantity of UV absorbent is preferably 0.05-3 parts by weight for 100 parts by weight of polycarbonate resin (A). 
       Examples 
       [0018]    The present invention will be exemplified in examples below, but the examples are not intended to limit the present invention. Note that parts and percentages are by weight unless otherwise specified. 
         [0019]    The blended components used are as follows. 
       (1) Polycarbonate Resin (A): 
       [0020]    Polycarbonate resin synthesized from bisphenol A and phosgene (Calibre 200-20 made by Sumika Styron Polycarbonate; viscosity-average molecular weight: 19,000; called “PC” hereinafter) 
       (2) Polybutyl Terephthalate Resin: 
       [0021]    600 FP made by Polyplastics (called “PBT” hereinafter) 
       (3) Alkyl Ketene Dimer 
       [0022]    AKD 1840 made by Forever Chemical (called “AKD” hereinafter) 
       (4) Rubber-Reinforced Styrene Resin (C) 
       [0023]    Bulk-polymerized ABS resin (Santac AT-05 made by Nippon A&amp;L; rubber quantity: 20%; called “ABS” hereinafter) 
       (5) Phosphorus-Based Antioxidant (D) 
       [0024]    (i) Tris(2,4-di-t-butylphenyl)phosphite (Irgafos P168 made by Ciba Specialty Chemicals; called “P168” hereinafter)
 
(ii) Phosphorus-based antioxidant having a main ingredient of tetrakis(2,4-di-t-butylphenyl)-4,4′-biphenylene phosphonite (Sandostab P-EPQ made by Clariant Japan; called “P-EPQ” hereinafter)
 
(6) Phosphorus-based antioxidants other than phosphorus-based antioxidant (D):
 
(i) Bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol phosphite (ADK STAB PEP36 made by ADEKA; called “AO1” hereinafter)
 
(ii) 6-[3-(3-methyl-4-hydroxy-5 -t-butylphenyl)propox]-2,4,8,10-tetra-t-butyl-dibenzo[d,f][1,3,2] dioxaphosphepin (Sumilizer GP made by Sumitomo Chemical; called “AO2” hereinafter)
 
(7) UV absorbent:
 
Benzotriazole-based UV absorbent: 2,2′-methylenebis[6-(2H-benzotriazol-2-yl) 4-(1,1,3,3-tetramethylbutyl) phenol] (LA-31 made by ADEKA Corporation; called “UVA” hereinafter)
 
         [0025]    The various blended components described above were put all at once in a tumbler in the blending ratios shown in Tables 1-3 and 5, and after being dry-mixed for 10 minutes, they were kneaded at a melt temperature of 280° C. using a biaxial extruder (KTX37 made by Kobe Steel), and pellets of the polycarbonate resin compositions (called “PC resin compositions” hereinafter) were obtained. For the PC resin compositions containing rubber-reinforced styrene resin (blending ratios shown in Table 4), pellets of the PC resin composition were obtained in the same manner except that the melt temperature was set to 240° C. 
         [0000]    The obtained PC resin compositions were evaluated as follows. 
         [0026]    Evaluation of Chemical Resistance 
         [0000]    Except for the PC resin compositions containing rubber-reinforced styrene resin (blending, ratios shown in Table 4), pellets of the PC resin compositions were dried for 4 hours at 125° C., and then test pieces (127×13×12 mm) were made at an injection pressure of 1600 kg/cm 2  using an injection molder (J-100E-C5 made by Japan Steel Works) at a set temperature of 280° C.
 
Strain was applied to the obtained test pieces using a cantilever chemical resistance test jig (illustrated below), and the centers of the test pieces were coated with the following chemicals.
 
       Chemicals Used in Evaluation: 
       [0027]    (i) Magiclean made by Kao (main ingredient: alkyl amine oxide I% aqueous solution) (called “C1” hereinafter)
 
(ii) Nivea cream made by Nivea-Kao (main ingredients; water, mineral oil petroleum jelly, hydrogenated polyisobutene, lanolin alcohol) (called “C2” hereinafter)
 
After the above chemicals were applied, the test pieces were left to stand for 48 hours in a 23° C. or 85° C. atmosphere, and critical strain ε (%) was determined from the generation of cracks (cracks or cervices) on the test pieces using equation (1).
 
         [0000]    
       
         
           
             
               
                 
                   [ 
                   
                     Equation 
                      
                     
                         
                     
                      
                     1 
                   
                   ] 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   ɛ 
                   = 
                   
                     
                       
                         3 
                         2 
                       
                       · 
                       
                         
                           h 
                            
                           
                               
                           
                            
                           δ 
                            
                           
                               
                           
                            
                           X 
                         
                         
                           1 
                           3 
                         
                       
                     
                     × 
                     100 
                      
                     
                       ( 
                       % 
                       ) 
                     
                   
                 
               
               
                 
                   ( 
                   1 
                   ) 
                 
               
             
           
         
       
     
       Here, 
       [0028]    ε: strain
 
h: test piece thickness
 
δ: maximum deflection
 
X: distance from maximum deflection point
 
l:span
 
Chemical resistance was judged according to the following standards from the critical strain determined by the equation above. Critical strain is preferably at least 0.7% (good to excellent).
 
Chemical resistance judgment:
 
Excellent: Critical strain is at least 1.0%
 
Good: Critical strain is at least. 0.7% and less than 1.0%
 
Possible: Critical strain is at least 0.5% and less than 0.7%
 
Impossible: Critical strain is at least 0.3% and less than 0.5%
 
Very impossible: Critical strain is less than 0.3%
 
         [0029]    Furthermore, for the PC resin compositions containing rubber-reinforced styrene resin (blending ratios shown in Table 4), test pieces (127×13×12 mm) were made in the same manner except that the drying temperature was 100° C. and the set temperature of the injection molder was 250° C. Strain of 0.3% (Equation 1) was applied to the obtained test pieces using a cantilever chemical resistance test jig, and the centers of the test pieces were coated with the following chemicals. 
       Solvent Used in Evaluation: 
       [0030]    No. 5700 thinner made by Ohashi Chemical Industries main ingredients: toluene, ethyl acetate, 1-butanol) (called “C3” hereinafter)
 
After the above solvent was applied, the test pieces were left to stand for 72 hours in a 23° C. atmosphere and were then bent by hand, and it was evaluated whether cracking occurred (impossible) or did not occur (good). Cracking preferably does not occur (good).
 
         [0031]    Evaluation of Transparency 
         [0000]    Except for the PC resin compositions containing rubber-reinforced styrene resin (blending ratios shown in Table 4), pellets of the PC resin compositions were dried for 4 hours at 125° C., and then test pieces (150×90×3.0 mm) were made at an injection pressure of 1600 kg/cm 2  using an injection molder (J-100E-05 made by Japan Steel Works) at a set temperature of 280° C. Light transmittance was measured according to JIS K7361 using the obtained test pieces. Light transmittance is preferably at least 80%. 
         [0032]    Evaluation of Notched Charpy Impact Strength And Deflection Temperature Under Load 
         [0000]    Except for the PC resin compositions containing rubber-reinforced styrene resin (blending ratios shown in Table 4), pellets of the PC resin compositions were dried for 4 hours at 125° C., and then test pieces conforming to ISO test methods were made at an injection pressure of 1600 kg/cm 2  using an injection molder (J-100E-05 made by Japan Steel Works) at a set temperature of 280° C. Using the obtained test pieces, notched Charpy impact strength and deflection temperature under load were measured based on ISO 179-1 and ISO 75-2. Notched Charpy impact strength is preferably at least 10 KJ/m 2 , and deflection temperature
 
under load is preferably at least 105° C. For the PC resin compositions containing rubber-reinforced styrene resin (blending ratios shown in Table 4), deflection temperature under load was measured in the same manner except that the drying temperature was 100° C. and the set temperature of the injection molder was 250° C. Deflection temperature under load is preferably at least 95° C.
 
         [0033]    Evaluation of Moldability 
         [0000]    Pellets of the PC resin compositions were dried for 4 hours at 100° C., and then flow length was measured using an Archimedes spiral flow die (width 10 mm. thickness 1.0 mm) at an injection pressure of 1600 kg/cm 2  using an injection molder (J-100E-C5 made by Japan Steel Works) at a set temperature of 250° C. The spiral flow length is preferably at least 110 mm. 
       Evaluation of Hydrolysis Resistance 
       [0034]    Pellets of the PC resin compositions were dried for 4 hours at 125° C., and then test pieces for transparency evaluation (150×90×3.0 mm) were made at an injection pressure of 1600 kg/cm 2  using an injection molder (J-100E-05 made by Japan Steel Works) at a set temperature of 280° Ck hydrolysis test was performed on the obtained test pieces using a hydrolysis tester (HAST System TPC-412M made by Tabai Espec) at 125° C., 100% RH for 48 hours, and the transparency of the test pieces was evaluated visually. Transparency is preferred, and test pieces exhibiting a frosted, cloudy or opaque appearance or test pieces that dissolve are undesirable. 
         [0035]    Evaluation of Weather Resistance 
         [0000]    Pellets of the PC resin compositions were dried for 4 hours at 125° C., and then test pieces for weather resistance evaluation (150×90×2.0 mm) were made at an injection pressure of 1600 kg/cm 2  using an injection molder (J-100E-05 made by Japan Steel Works) at a set temperature of 280° C. The obtained test pieces were placed in an accelerated weathering machine (Super Xenon Weather Meter SX75 made by Suga Test Instruments), and irradiation was performed at 150 W/m for 300 hours under rain-free conditions. After that, YI of the test pieces was measured after irradiation, and ΔY (difference in YI) was
 
determined. The value of ΔYI, which indicates the degree of discoloration, is preferably less than 12.0.
 
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 1 
               
             
             
               
                   
                   
               
               
                   
                 Example 
                 Comparative example 
               
             
          
           
               
                   
                 1 
                 2 
                 3 
                 1 
                 2 
                 3 
                 4 
               
               
                   
                   
               
             
          
           
               
                 PC (parts) 
                 100 
                 100 
                 100 
                 100 
                 100 
                 80 
                 100 
               
               
                 PBT (parts) 
                 — 
                 — 
                 — 
                 — 
                 — 
                 20 
                 — 
               
               
                 AKD (parts) 
                 0.2 
                 5 
                 10 
                 — 
                 0.005 
                 — 
                 25 
               
               
                 AO1 (parts) 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
               
               
                 Chemical resistance 23° C. 
                 Excellent 
                 Good 
                 Good 
                 Possible 
                 Possible 
                 Impossible 
                 Pellets could not be made 
               
               
                 Chemical: C1 
                   
                   
                   
                   
                   
                   
                 because granulation 
               
               
                 Chemical resistance 85° C. 
                 Excellent 
                 Good 
                 Good 
                 Possible 
                 Possible 
                 Good 
                 processing was difficult 
               
               
                 Chemical: C2 
               
               
                 Light transmittance (%) 
                 90 
                 86 
                 82 
                 90 
                 90 
                 68 
               
               
                 Notched Charpy impact strength 
                 60 
                 57 
                 12 
                 60 
                 59 
                 8 
               
               
                 (KJ/m 2 ) 
               
               
                 Deflection temperature under load (° C.) 
                 123 
                 110 
                 106 
                 126 
                 125 
                 100 
               
               
                   
               
             
          
         
       
     
         [0036]    Results are shown in the tables below. 
         [0000]    
       
         
               
               
             
               
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 2 
               
             
             
               
                   
                   
               
               
                   
                 Example 
               
             
          
           
               
                   
                 4 
                 5 
                 6 
                 7 
                 8 
                 9 
                 10 
                 11 
                 12 
                 13 
               
               
                   
                   
               
             
          
           
               
                 PC (parts) 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
               
               
                 PBT (parts) 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
               
               
                 AKD (parts) 
                 0.2 
                 0.2 
                 0.2 
                 0.2 
                 5 
                 5 
                 5 
                 5 
                 10 
                 10 
               
               
                 P-EPQ (parts) 
                 0.01 
                 0.03 
                 0.06 
                 0.1 
                 0.01 
                 — 
                 0.06 
                 0.1 
                 0.01 
                 0.03 
               
               
                 P168 (parts) 
                 — 
                 0.03 
                 — 
                 — 
                 — 
                 0.06 
                 — 
                 — 
                 — 
                 0.03 
               
               
                 Chemical resistance 23° C. 
                 Excellent 
                 Excellent 
                 Excellent 
                 Excellent 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
               
               
                 Chemical: C1 
               
               
                 Chemical resistance 85° C. 
                 Excellent 
                 Excellent 
                 Excellent 
                 Excellent 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
               
               
                 Chemical: C2 
               
               
                 Light transmittance (%) 
                 90 
                 89 
                 90 
                 90 
                 85 
                 86 
                 86 
                 84 
                 80 
                 81 
               
               
                 Notched Charpy impact 
                 60 
                 58 
                 61 
                 59 
                 56 
                 57 
                 57 
                 55 
                 13 
                 11 
               
               
                 strength (KJ/m 2 ) 
               
               
                 Deflection temperature under 
                 123 
                 123 
                 122 
                 123 
                 112 
                 110 
                 111 
                 111 
                 105 
                 107 
               
               
                 load (° C.) 
               
               
                 Hydrolysis resistance 
                 Transparent 
                 Transparent 
                 Transparent 
                 Transparent 
                 Transparent 
                 Trans- 
                 Trans- 
                 Trans- 
                 Trans- 
                 Trans- 
               
               
                   
                   
                   
                   
                   
                   
                 parent 
                 parent 
                 parent 
                 parent 
                 parent 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 3 
               
             
             
               
                   
                   
               
               
                   
                 Example 
                 Comparative example 
               
             
          
           
               
                   
                 14 
                 15 
                 16 
                 17 
                 18 
                 5 
                 6 
                 7 
                 8 
               
               
                   
                   
               
             
          
           
               
                 PC (parts) 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
                 100 
                 80 
                 100 
               
               
                 PBT (parts) 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 20 
                 — 
               
               
                 AKD (parts) 
                 10 
                 10 
                 0.2 
                 0.2 
                 0.2 
                 — 
                 0.005 
                 — 
                 25 
               
               
                 P-EPQ (parts) 
                 0.06 
                 0.1 
                 0.003 
                 0.2 
                 — 
                 0.06 
                 0.06 
                 0.06 
                 0.06 
               
               
                 AO1 (parts) 
                 — 
                 — 
                 — 
                 — 
                 0.06 
                 — 
                 — 
                 — 
                 — 
               
               
                 Chemical 
                 Good 
                 Good 
                 Excellent 
                 Excellent 
                 Excellent 
                 Possible 
                 Possible 
                 Impossible 
                 Pellets could 
               
               
                 resistance 23° C. 
                   
                   
                   
                   
                   
                   
                   
                   
                 not be made 
               
               
                 Chemical: C1 
                   
                   
                   
                   
                   
                   
                   
                   
                 because granulation 
               
               
                 Chemical 
                 Good 
                 Good 
                 Excellent 
                 Excellent 
                 Excellent 
                 Possible 
                 Possible 
                 Good 
                 processing 
               
               
                 resistance 85° C. 
                   
                   
                   
                   
                   
                   
                   
                   
                 was 
               
               
                 Chemical: C2 
                   
                   
                   
                   
                   
                   
                   
                   
                 difficult 
               
               
                 Light transmittance 
                 82 
                 82 
                 90 
                 88 
                 89 
                 90 
                 90 
                 68 
               
               
                 (%) 
               
               
                 Notched Charpy 
                 12 
                 12 
                 60 
                 55 
                 59 
                 60 
                 59 
                 8 
               
               
                 impact strength 
               
               
                 (KJ/m 2 ) 
               
               
                 Deflection temperature 
                 106 
                 106 
                 123 
                 122 
                 122 
                 126 
                 125 
                 100 
               
               
                 under load (° C.) 
               
               
                 Hydrolysis resistance 
                 Transparent 
                 Transparent 
                 Cloudy 
                 Dissolved 
                 Cloudy 
                 Transparent 
                 Transparent 
                 Cloudy 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 4 
               
             
             
               
                   
                   
               
               
                   
                   
                 Comparative 
               
               
                   
                 Example 
                 example 
               
             
          
           
               
                   
                 19 
                 20 
                 21 
                 22 
                 23 
                 24 
                 25 
                 9 
                 10 
               
               
                   
                   
               
             
          
           
               
                 PC (parts) 
                 90 
                 70 
                 70 
                 70 
                 50 
                 100 
                 30 
                 90 
                 60 
               
               
                 ABS (parts) 
                 10 
                 30 
                 30 
                 30 
                 50 
                 — 
                 70 
                 10 
                 40 
               
               
                 AKD (parts) 
                 5 
                 0.2 
                 5 
                 10 
                 5 
                 0.2 
                 0.2 
                 — 
                 25 
               
               
                 AO2 (parts) 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
                 0.04 
               
               
                 Chemical resistance 23° C. 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
                 Good 
                 Impossible 
                 Pellets could 
               
               
                 Chemical: C3 
                   
                   
                   
                   
                   
                   
                   
                   
                 not be made 
               
               
                 Deflection temperature under 
                 120 
                 110 
                 110 
                 110 
                 100 
                 126 
                 90 
                 120 
                 because 
               
               
                 load (° C.) 
                   
                   
                   
                   
                   
                   
                   
                   
                 granulation 
               
               
                 Moldability: 
                 125 
                 175 
                 175 
                 175 
                 225 
                 100 
                 275 
                 125 
                 processing 
               
               
                 Spiral flow length (mm) 
                   
                   
                   
                   
                   
                   
                   
                   
                 was difficult 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                   
                 TABLE 5 
               
             
             
               
                   
                   
               
               
                   
                 Example 
               
             
          
           
               
                   
                 26 
                 27 
                 28 
               
               
                   
                   
               
             
          
           
               
                 PC (parts) 
                 100 
                 100 
                 100 
               
               
                 AKD (parts) 
                 0.2 
                 5 
                 10 
               
               
                 AO1 (parts) 
                 0.04 
                 0.04 
                 0.04 
               
               
                 UVA (parts) 
                 0.2 
                 0.5 
                 2 
               
               
                 Chemical resistance 23° C. 
                 Excellent 
                 Good 
                 Good 
               
               
                 Chemical: C1 
               
               
                 Chemical resistance 85° C. 
                 Excellent 
                 Good 
                 Good 
               
               
                 Chemical: C2 
               
               
                 Light transmittance (%) 
                 90 
                 85 
                 80 
               
               
                 Notched Charpy impact strength 
                 60 
                 57 
                 12 
               
               
                 (KJ/m 2 ) 
               
               
                 Weather resistance (ΔYI) 
                 11 
                 8 
                 4 
               
               
                   
               
             
          
         
       
     
         [0037]    The cases in which the polycarbonate resin composition satisfied the constituent elements of the present invention (examples) exhibited good results for chemical resistance, solvent resistance, impact strength and heat resistance.

Technology Classification (CPC): 2