POLYMER COMPOSITIONS

Abstract: Polymer compositions including an olefinic polymer, a polar polymer and a compatibilizer are disclosed. The compatibilizer can be a block or graft copolymer including polymer portions that are compatible with the olefinic polymer and polymer portions that are compatible with the polar polymer.

Description: - 1 POLYMER COMPOSITIONS Cross Reference to Related Application This application claims benefit from provisional application Serial No. unknown filed March 31, 1998. Background of the Invention The invention relates to polymer compositions. Polymer compositions that include polar polymers and olefinic polymers are known. These polymer compositions often include one or more additional compounds which act as compatibilizers for the polar and olefinic polymers. Summary of the Invention The invention relates to polymer compositions. These compositions can exhibit good flame retardancy and/or low smoke formation. The polymer compositions can provide good mechanical properties, such as tensile strength and elongation. The polymer compositions can contain small amounts of halogens. The compositions can be in the form of a blend. In one aspect, the invention features a polymer blend that includes an olefinic polymer, a polar polymer and an additional polymer that includes first and second polymer portions. The first polymer portion is compatible with the olefinic polymer, and the second polymer portion is compatible with the polar polymer. In another aspect, the invention features a method of making a polymer composition. The method includes forming a polymer comprising first and second polymer portions in a mixture. The mixture includes an olefinic polymer and a polar polymer. The first polymer portion is compatible with the olefinic polymer, and the second polymer portion is compatible with the polar polymer. In another aspect, the invention features a method of forming a polymer composition. The method includes forming a polymer containing first and second polymer portions, and mixing the polymer in a mixture. The mixture includes an olefinic polymer and a polar polymer. The first polymer portion is compatible with the olefinic polymer, and the second polymer portion is compatible with the polar polymer. Description of the Preferred Embodiments The preferred compositions include an olefinic polymer, a polar polymer and a compatibilizer. The compatibilizer can be a block or graft copolymer. The compatibilizer includes at least one olefinic polymer portion that is compatible with the olefinic polymer, and the compatibilizer includes at least one polar polymer portion that is compatible with the polar polymer. The polymer portions can be in the form of blocks. Typically, the compositions are in the form of a blend in which the components of the composition are intermixed. The blend can be a homogeneous blend. Olefinic polymers are formed primarily of olefin monomers which are hydrocarbon monomers having at least one carbon-carbon double bond. Olefin monomers can be straight chained, branched or cyclic hydrocarbons. Examples of olefin monomers include ethylene, propylene, butylene and pentene. Examples of olefinic polymers include polyethylene, ethylene copolymers, polypropylene, propylene copolymers, ethylene propylene copolymers and polymethylpentene polymers . In addition to olefin monomers, an olefinic polymer can include a minor amount of non-olefinic monomers, such as ethylene acrylic monomers. Preferably, an olefinic polymer includes less than about 20 weight percent non-olefinic monomers, more preferably less than about 10 weight percent non-olefinic monomers and most preferably less than about 5 weight percent non-olefinic monomers. Preferably, an olefinic polymer includes at least about 80 weight percent olefin monomers, more preferably at least about 90 weight percent olefin monomers, and most preferably at least about 95 weight percent olefin monomers . Olefinic polymers preferably include less than about 2 weight percent halogen, more preferably less than about 1 weight percent halogen and most preferably less than about 0.5 weight percent halogen. Olefinic polymers are available from, for example, Exxon, Mobil, Chevron, Amoco, Dow, Quantum, Solvay, Novacor, Rexene, Aristech, Hoechst Celanese, Fina, Montall and Shell. A polar polymer includes olefin monomers and polar monomers having the formula CH 2 =CHOCOR, where R is a hydrocarbon group that can be straight chained or branched, saturated or unsaturated, and substituted or unsubstituted. Typically, R is a straight chained, saturated and unsubstituted alkyl group having from one to five carbon atoms, such as a methyl group, an ethyl group or a butyl group. In a polar polymer, a portion of the polar monomers can be hydrolyzed. A polar polymer can include additional functional monomers such as carbon monoxide, acrylic monomers, glycidyl acrylic monomers, acid monomers, anhydride monomers, and/or nitrile monomers. Preferably, a polar polymer includes from about 20 weight percent to about 90 weight percent olefinic monomers, more preferably from about 35 weight percent to about 85 weight percent olefinic monomers, and most preferably from about 50 weight percent to about 80 weight percent olefinic monomers . Preferably, a polar polymer includes from about 10 weight percent to about 80 weight percent polar monomers, more preferably from about 15 weight percent to about 65 - 4 - weight percent polar monomers, and most preferably from about 20 weight percent to about 50 weight percent polar monomers . Preferably, a polar polymer includes at most about 15 weight percent additional functional monomers, more preferably from about 2.5 weight percent to about 10 weight percent additional functional monomers. Polar polymers preferably include less than about 2 weight percent halogen, more preferably less than about 1 weight percent halogen, and most preferably less than about 0.5 weight percent halogen. In a preferred embodiment, the polar polymer is a terpolymer of ethylene monomers, vinyl acetate monomers and carbon monoxide . Polar polymers are available from, for example, Exxon, Quantum, DuPont , Union Carbide, AT Plastics, Chevron, Bayer, Mitsubishi Petrochemicals and Sumitomo. The compatibilizer is typically a graft or block copolymer that includes at least one olefinic polymer portion and at least one polar polymer portion. The polymer portions can be in the form of blocks. The olefinic polymer portion is formed of an olefinic polymer, and the polar polymer portion is formed of a polar polymer. The olefinic polymer portion should be selected to be compatible with the olefinic polymer, and the polar polymer portion should be selected to be compatible with the polar polymer. Generally, the olefinic polymer portion of the compatibilizer and the olefinic polymer have substantially the same polarity, and the polar polymer portion of the compatibilizer and the polar polymer have substantially the same polarity. Preferably, the olefinic polymer portion of the compatibilizer is the same polymer as the olefinic polymer. For example, if the olefinic polymer is - 5 - polyethylene, the olefinic polymer portion of the compatibilizer is also polyethylene. Preferably, the polar polymer portion of the compatibilizer includes functional groups that are the same as the functional groups in the polar polymer. For example, if the polar polymer is ethylene vinyl acetate, the polar polymer portion of the compatibilizer includes vinyl acetate monomers . The polymer compositions can include from about 15 weight percent to about 65 weight percent olefinic polymer, from about 20 weight percent to about 80 weight percent polar polymer, and from about 1 weight percent to about 40 weight percent compatibilizer. The olefinic polymer portions and polar polymer portions of the compatibilizer can be directly chemically bonded or they can be connected by a linking agent that is chemically bonded to an olefinic polymer portion and an adjacent polar polymer portion. When a linking agent is not used, the compatibilizer can be formed by reacting two polymers that contain functional groups that react to provide the compatibilizer. This reaction can occur in a mixture that contains the olefinic polymer and the polar polymer. Alternatively, the compatibilizer can first be formed then added to a mixture that contains the olefinic polymer and the polar polymer. An amine and/or epoxy containing polymer, such as a nitrile rubber, can be reacted with an acid or anhydride containing polyolefin. An acid or anhydride containing polymer, such as a nitrile rubber, can be reacted with an amine and/or epoxy containing polyolefin. An isocyanate containing polyester (typically having a low molecular weight) can be reacted with an acid, anhydride or epoxy containing polyolefin. A compatibilizer can be formed by reacting an epoxy containing terpolymer of ethylene, vinyl acetate and carbon monoxide with a maleic acid modified polypropylene. A compatibilizer can be formed by reacting an ethylene methyl acrylate acid containing polar polymer with an epoxy containing styrene ethylene butylene styrene block copolymer. Preferably, the functional groups that react to form the compatibilizer are at the terminus of the polymers . Examples of linking agents include diepoxides, diamines and diisocyanates which can be reacted with an acid modified polar polymer and an acid modified olefinic polymer to provide a compatibilizer. The polymer compositions can be prepared using standard mixing methods. For example, the polymer compositions can be formed using a Banbury mixer, a Brabender mixer and/or a twin screw mixer. Generally, twin screw mixers provide a higher shear during mixing, so polymer compositions formed using a twin screw extruder can exhibit better elongation and tensile properties . The polymer compositions can also include compounds that improve the hydrolytic stability of esters, silicones, stabilizers, flame retardants, plasticizers, colorants, reinforcing fillers and/or lubricants. Preferably, the total amount of these compounds in the polymer compositions is from about 50 to about 200 parts per 100 parts of total amount of polymer (olefinic polymer, polar polymer and compatibilizer) . When the composition includes anti-oxidants or lubricants, these compounds make up from about 100 parts per million to about 10 weight percent of the composition relative to the total amount of polymer (olefinic polymer, polar polymer and compatibilizer) . - 7 - Examples of compounds that improve the stability of esters include polycarbodiimides, such as aromatic polycarbodiimides . These compounds are available from, for example, Bayer. Examples of colorants include organic and inorganic colorants. Colorants are available from, for example, Ciba Geigy, BASF, Ferro, ICI, Harwick and Teknor Apex. Examples of flame retardants include aluminum trihydrate, magnesium hydroxide, phosphorus compounds, nitrogen compounds, zinc borates, halogenated compounds, and Ultracarb (Microfine Minerals) . Flame retardants are available from, for example, Lonza, Alcoa, Alcan, Huber, Martin Marietta, Hoechst Celanese, U.S. Borax, Melamine Chemicals, Microfine Minerals and Anzon. Examples of stabilizers include heat stabilizers, metal deactivators and ultraviolet stabilizers. Stabilizers are available from, for example, Ciba Geigy, Sandoz, Cytec, Eastman Chemicals, Fairmount Chemicals, Hoechst Celanese and General Electric. Examples of plasticizers include phosphate ester plasticizers, phosphoric esters, fatty acid esters, esters of azelaic acid, esters of sebacic acid, trimellitic esters and polymeric plasticizers. When the polymer compositions are used in flame retardant applications, phosphate ester plasticizers are preferably used. Plasticizers are available from, for example, Solutia, Teknor Apex, Ferro, Exxon, Eastman Chemical and Uniflex Chemical. Lubricants are available from, for example, Akzo, Dow Corning, DuPont , Astor Wax, Henkel, Witco and Struktol . Silicones are available from, for example, General Electric, Wacker silicones and Dow Corning. - 8 - Examples of reinforcing fillers include clay, silica and calcium carbonate. Reinforcing fillers are available from, for example, Haber, Engelhard and PPG. The polymer compositions preferably have an elongation of at least about 100% as measured according to ASTM D-638. The polymer compositions preferably have a tensile strength of at least about 1000 as measured according to ASTM D-638. The polymer compositions preferably have a peak smoke rating of less than 3/meter as measured using cone calorimetry according to ASTM E-1354. When used for flame retardant applications, the polymer compositions preferably have a limiting oxygen index of at least about 30 as measured by ASTM D-2863. Table I lists polymer compositions and their properties. These compositions were prepared using a Brabender mixer (PL 2000 with roller type blades) . The speed was adjusted to keep the mixture at about 180°C. The polymers were mixed, and the filler was slowly added. This mixture was mixed for about five minutes, and the stabilizer was added. This mixture was mixed for about one minute, removed from the Brabender mixer and pressed to a thin sheet using a cool press. The resulting material was compression molded at about 220°C. This material was then cooled and the properties of the material were evaluated. TABLE I Ethylene Vinyl Acetate Copolymer 1 50 45 45 50 45 t-fi o Ethylene Vinyl Acetate Copolymer^ 50 45 50 45 45 t*» IΛ O Polypropylene Copolymer 3 50 45 50 45 45 50 45 45 50 45 Polypropylene Copolymer' Maleic Acid Modified Polypropylene 5 5 5 5 5 5 5 Ethylene Butyl Acrylate Epoxide 6 5 5 5 5 5 5 Silicone Resin 3 3 3 3 Silicone Resin 8 3 3 Magnesium Hydroxide 9 170 170 170 170 170 170 170 170 170 170 Steaπc Acid 10 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 Anti-oxidant 11 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0.4 Metal Deactivator 12 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 I I Hardness, Shore C π 70/66 69/65 68/84 67/64 69/64 67/61 68/64 67/63 66/60 67/62 Tensile Strength, PSI" 16 3 0 1930 1570 1940 1890 1400 1740 1730 1300 1560 Elongation At Break, i" 5 5 4 6 5 3 13 8 4 3 Limiting Oxygen Index % 15 29 31 33 32 31 33 32 32 35 33 Dielectric Constant (lKHz)" 3 5 3 5 3 5 3 5 3 5 3 6 3 7 3 6 3 7 3 6 Dissipation Factor (lKHz) 16 0 0037 0 0032 0 0032 0 0034 0 0040 0 0039 0 0043 0 0340 0 0035 0 0035 DElvax 265, commercially available from DuPont 2)Elvax 470, commercially available from DuPont 3) Profax SR 256 M, commercially available from Montell 4)Fortιlene KB 4104, commercially available from Solvay 5) Unite MP 1000, commercially available from Aristech 6)Elvaloy AS, commercially available from DuPont 7)4-7051 silicone resin, commercially available from Dow Corning *0 8)4-7105 silicone resin, commercially available from Dow Corning O 9)Magnιfιn H5GV, commercially available from Lonza H lOJSteaπc Acid, commercially available from Harwick Chemical Corporation 11) Irganox/BNX 1010, commercially available from Ciba-Geigy 12)Irganox MD 1024, commercially available from Ciba-Geigy vo 13)ASTM D-2240 o 14)ASTM D-638 tΛ 151ASTM D 2863 Os Os 16 J ASTM D 150 © - 10 - Table II lists polymer compositions and their properties. These compositions were prepared using a twin screw extruder (Berstoff Model 40) . All ingredients were metered and added at the feed throat . The temperature was controlled such that the temperatures in the mixing zones was at most about 420°F. The mixing speed was about 170 rpm. The compositions were molded using the same method as used for the compositions in Table I. As shown in Table II, the materials prepared using a twin screw extruder exhibited better elongation properties relative to materials prepared using lower shear methods . TABLE II Ethylene Vinyl Acetate copolymer' 55 Ethylene Vinyl Acetate copolymer' 45 65 Polypropylene Copolymer 5 45 25 35 Maleic Acid Modified Polypropylene' 5 5 S vo vo Di Ethylene Butyl Acrylate Epoxide 5 5 5 5 o Magnesium Hydroxide" 170 170 170 o Zinc Stearate 7 0 4 0 4 0 4 Specific Gravity' 1 1 44 1 44 1 46 Anti-oxidant 1 0 4 0 4 0 4 Metal Deactivator 8 0 4 0 4 0 4 Hindered Amine Light Stabilizer" 0 4 0 4 0 4 Silicone Resin 0 4 0 4 0 4 Hardness, Shore D (Inst/10 Sec ) ' 2 68/63 64/60 67/60 Tensile strength (UTS) , Psi" 1600 1340 1280 Elongation ® Break (EU) , %" 150 130 350 Brittle Point, C" -21 -11 6 Dielectric Constant (lKHz)' ζ 3 5 3 6 3 8 Dissipation Factor (lKHz) 1 0 00419 0 00457 0 00415 Oxygen Index 16 35 35 36 Peak Heat Release Rate, KW/SQM" 146 171 156 Avg Heat Release Rate, KW/SQM" 85 107 96 Avg Heat Release Rate @3 rain , KW/SQM" 116 134 115 Total Heat Released, MJ/SQM' 7 174 174 168 Avg Specific Extinction Area, SQM/Kg 1 ' 143 248 295 Peak Smoke, 1/M' 0 5 0 9 0 9 Time to Ignition, Sec " 110 134 112 O (l)Elvax 265, commercially available from DuPont ΠTΓ H (2)Elvax 470, commercially available from DuPont (12)AS1M D-2240 (3)Profax SR 256 M, commercially available from Montell (13) ASTM D 638 (4)Unιte MP 1000, commercially available from Ariεtech (14) o (S)Elvaloy AS, commercially available from DuPont (151ASTM D-150 © (6) Zinc Stearate, commercially available from Harwick Chemical Corporation (16)ASTM D-2863 » (7) Irganox/BNX 1010, commercially available from Ciba-Geigy ( 17 ) ASTM E- 1354 (cone caloπmetry) σ\\ o (8)Irganox MD 1024, commercially available from Ciba-Geigy (9)Chιmsorb 944 FL, commercially available from Ciba-Geigy (10)4-7051 silicone resin, commercially available from Dow Corning - 12 - Table III lists polymer compositions and their properties. These compositions were made according to the method discussed above with respect to Table I. TABLE III Ethylene 65 65 50 45 50 45 Vinyl Acetate copolymer 1 Ethylene 65 65 65 65 65 50 45 50 45 vo Vinyl Acetate tjfi copolymer 1 © Polypropylene 50 45 50 45 © Copolymer 1 Pol propylene 35 35 35 35 35 35 35 50 45 50 45 Copolymer' Maleic Acid 0 3 5 5 10 3 5 5 5 5 5 Modified Polypropylene 1 " Ethylene 10 6 5 5 0 6 6 5 S 5 5 Butyl Acrylate Expoxide 6 Stearic Acid' 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 Hindered 0 4 0 4 0 4 0 4 0 4 0 4 0 4 Amine Light Stabilizer 8 Λnti ox -int* 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 Metal 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 0 4 Deactivator' I Hardness 47/42 48/44 47/43 47/41 47/41 49/45 49/45 57/53 55/50 59/54 58/54 55/50 57/52 58/52 56/51 Shore D" Tensile -> i 80 1440 2920 3780 2070 1850 ^30 1750 3090 2710 2880 2160 3540 2190 3750 Strength PSI 1 Elongation At 660 460 600 680 510 540 500 210 530 520 470 490 590 150 620 Bieak, %' Limiting 16 18 17 18 19 19 18 18 17 17 18 18 18 18 18 Oxygen Index 1 ' Dielectric 2 91 2 89 2 97 2 97 2 94 2 86 2 79 2 5 7 5 2 5 2 5 2 6 2 7 2 7 ? 7 Constant (1 KHz) ' -a Dissipat lc n 0 001 0 0009 0 0011 0 0010 0 0310 0 0318 0 0011 0 001 n Factor 0 1 H (lKHz)" (l)Elvax 265, commercially available from DuPonL (6)Elvaloy AS, commercially available from DuPont Λ vo (2)Elvax 470 commercially available from DuPont (7)Stearιc Acid commercially available from Harwick Chemical Corpont ion vo (3)Profax SR 256 M, commercially available from Montell (β)Chιmsorb 944 FL, commercially available from Ciba Geigy β (4)Fortιlene KB 4104, commercially available from Solvay (9)Irganox 1010, commercially available from Ciba Geigy in o\ {SHϊnite MP 1000 commercially available from Aristech (lθ)lrganox 1024 commercially available from Ciba Geigy © (ll)ASTM D 2240 (121ASTM D-638 (13)ASTM D 2863 (14) ASTM D 150 - 14 - Table IV lists polymer compositions and their properties. These compositions were prepared by mixing the olefinic polymers and polar polymers in a Banbury mixer (Farrel Midget Banbury mixer) using a medium rotor speed. When the mixture reached a temperature of about 10° C greater than the melting temperature of polyethylene, about one half of the filler (ATH) was added and mixed. Then the remaining half of the filler (ATH) was added. The mixing speed was reduced, and the mixture was mixed for about five minutes. The stabilizers were added to this mixture while maintaining a low rotor speed, and this mixture was mixed for about one minute. The resulting compositions were molded as described for the compositions of Table I . TABLE IV o rf VO tr VO Ethylene Vinyl Acetate copolymer' 100 100 100 ϋoϊ w Ethylene Butyl Acrylate Epoxide 2 20 20 20 © Maleic Acid Modified Ethylene Vinyl 100 100 100 Acetate terpolymer 3 o P. Maleic Acid Modified Polyethylene' 10 10 10 H 3 Polyethylene'' 100 100 100 fD Aluminum Trihydrate 690 620 560 rr ω Anti Oxidant 7 2 2 2 PJ Specific Gravity" 1 6 1 56 1 52 ω Hardness, Shore D' 66/62 64/60 62/57 H Tensile Strength (TS) , PSI" 1 2340 2220 2170 ΓT Elongation (EU) , % 10 110 130 140 w Dielectric Constant (lKHz)" 4 02 3 95 3 9 in o Dissipation Factor (lKHz) 11 0 0085 0 0063 0 0077 0 ) Limiting Oxygen Index, % 12 40 35 34 H 3 Peak Heat Release Rate, KW/SQM" 166 184 156 ω Avg Heat Release Rate, KW/SQM" 83 92 94 Avg Heat Release Rate<»3mιn , KW/SQM ,J 73 88 86 Total Heat Released, MJ/SQM ' 138 153 155 Avg Specific Extinction Area, SQM/Kg JJ 240 260 232 Peak Smoke, 1/M' J 1 4 1 6 1 Time to Ignition, Sec " 162 140 124 ( 1 ) Elvax 265, commercially available from DuPont ( 2 ) Elvaloy AS, commercially available from DuPont ( 3 ) Fusabond C MC 250D, commercially available from DuPont n ( 4 ) Fusabond E MB 100D, commercially available from DuPont ( 5 ) Engage 8480, commercially available from Dow DuPont Joint Venture ( 6 ) Hydral 710, commercially available from Alcoa vo ( 7 ) Irganox 1010, commercially available from Ciba Geigy VO ( 8 ) © ( 9 ) ASTM D-2240 Ov ( 10 )ASTM D-638 ( 11 )ASTM D 150 © ( 12 )ASTM D-2863 ( 13 1ASTM E-1354 (cone calorimetry)

Claims: - 16 - What is claimed is: 1. A composition, comprising: a blend including: an olefinic polymer; a polar polymer; and a third polymer comprising first and second polymer portions, the first polymer portion being compatible with the olefinic polymer and the second polymer portion being compatible with the polar polymer. 2. The composition according to claim 1, wherein the third polymer is selected from the group consisting of a graft copolymer and a block copolymer. 3. The composition according to claim 2, wherein the polar polymer includes ethylene monomers and vinyl acetate monomers. 4. The composition according to claim 3 , wherein the second polymer portion includes ethylene monomers and vinyl acetate monomers. 5. The composition according to claim 3, wherein the polar polymer further includes carbon monoxide monomers . 6. The composition according to claim 5, wherein the second polymer portion includes ethylene monomers and vinyl acetate monomers . 7. The composition according to claim 1, wherein the olefinic polymer includes ethylene monomers. 8. The composition according to claim 7, wherein the first polymer portion includes ethylene monomers. - 17 - 9. The composition according to claim 1, wherein the olefinic polymer comprises polyethylene . 10. The composition according to claim 9, wherein the first polymer portion includes ethylene monomers. 11. The composition according to claim 1, wherein the olefinic polymer includes propylene monomers . 12. The composition according to claim 11, wherein the first polymer portion includes propylene monomers . 13. The composition according to claim 1, wherein the olefinic polymer comprises polypropylene. 14. The composition according to claim 13, wherein the first polymer portion includes propylene monomers . 15. The composition according to claim 1, wherein the polar polymer includes ethylene monomers and vinyl acetate monomers . 16. The composition according to claim 15, wherein the second polymer portion includes ethylene monomers and vinyl acetate monomers. 17. The composition according to claim 15, wherein the polar polymer further includes carbon monoxide monomers . 18. The composition according to claim 17, wherein the second polymer portion includes ethylene monomers and vinyl acetate monomers . - 18 - 19. The composition according to claim 15, wherein the olefinic polymer is an olefinic polymer. 20. The composition according to claim 19, wherein the first polymer portion includes ethylene monomers . 21. The composition according to claim 19, wherein the first polymer portion includes propylene monomers . 22. The composition according to claim 15, wherein the olefinic polymer includes ethylene monomers. 23. The composition according to claim 22, wherein the first polymer portion includes ethylene monomers . 24. The composition according to claim 15, wherein the olefinic polymer comprises polyethylene. 25. The composition according to claim 24, wherein the first polymer portion includes ethylene monomers . 26. The composition according to claim 15, wherein the olefinic polymer includes propylene monomers 27. The composition according to claim 26, wherein the first polymer portion includes propylene monomers . 28. The composition according to claim 15, wherein the olefinic polymer comprises polypropylene. - 19 - 29. The composition according to claim 28, wherein the first polymer portion includes propylene monomers . 30. The composition according to claim 1, wherein the composition comprises from about 20 weight percent to about 70 weight percent of the olefinic polymer, from about 30 weight percent to about 80 weight percent of the polar polymer, and from about 1 weight percent to about 40 weight percent of the third polymer. 31. The composition according to claim 1, wherein the composition comprises from about 35 weight percent to about 50 weight percent of the olefinic polymer, from about 50 weight percent to about 65 weight percent of the polar polymer, and from about 5 weight percent to about 20 weight percent of the third polymer. 32. The composition according to claim 1, further comprising a compound selected from the group consisting of a filler, a stabilizer, a plasticizer and a lubricant. 33. The composition according to claim 1, wherein the olefinic polymer is substantially free of halogen and the polar polymer is substantially free of halogen. 34. A method of forming a composition, comprising : forming a polymer comprising first and second polymer portions in a mixture comprising an olefinic polymer and an polar polymer, wherein the first polymer portion is compatible with the olefinic polymer and the second polymer portion is compatible with the polar polymer. - 20 - 35. The method according to claim 34, wherein the composition is a blend. 36. A method of forming a composition, comprising: forming a polymer comprising first and second polymer portions; and mixing the polymer in a mixture comprising an olefinic polymer and an polar polymer, wherein the first polymer portion is compatible with the olefinic polymer and the second polymer portion is compatible with the polar polymer. 37. The method according to claim 36, wherein the composition is a blend.

Inventors: ANDRIES JOHN, MALLIN DAN, PATEL RAMAN, SAUNDERS KEITH, TIBERIO PATRICK, ANDRIES, JOHN, MALLIN, DAN, PATEL, RAMAN, SAUNDERS, KEITH, TIBERIO, PATRICK
Applicants: ANDRIES JOHN, MALLIN DAN, PATEL RAMAN, SAUNDERS KEITH, TEKNOR APEX CO, TIBERIO PATRICK, ANDRIES, JOHN, MALLIN, DAN, PATEL, RAMAN, SAUNDERS, KEITH, TEKNOR APEX COMPANY, TIBERIO, PATRICK
Application year: 1999
Main classification: C08L53
IPC codes: C08L23, C08L25, C08L31, C08L33, C08L51, C08L53, C08L101