Caution
The product(s) listed in this brochure (PRODUCT) is manufactured
and sold under a license from THE DOW CHEMICAL COMPANY(U.S.A.). PRODUCT is subject to U.S. Export Administration
Regulations and is classiﬁed as EAR99 thereunder. Please ensurecompliance with applicable U.S. export control laws and regulations
as a Iicense issued by the U.S. governmnt may be required prior toexporting or selling PARODUCT to certain countries, areas,organizations or individuals as designated by the U.S. Government.
(Further detaiIs regarding U.S. export control may be obtained at web
sites of various U.S. government departments including:
http://www.biS.doc.gov/index.htm or http://www.bxa.doc.gov/)！

Oxazoline functionalized reactive copolymers

Novel Low toxic Polymer Crosslinker andAdhesion Promoting agent for waterborne

Warning・In handling or using the product(s) listed in this brochure(PRODUCT). please read and understand-the content of thisbrochure and ther relevant materiaI safety data sheet (SDS) prior
to such handling or use.
・The content of this brochure is subject to change without notice
due to (i) improvement of performance of the PRODUCT. (ii)development of new method for inspection. analysis or evaluation of
the PRODUCT or (iii) any other factors relating to the PRODUCT.
・The information contained in this brochure is based on materials,
data and information available as of the date of publication of thisbrochure. Nippon Shokubai makes no warranties，express or
impiied, wit respect to the content of this brochure. including thedata and informaion contained in this brochure. Moreover. thenotes in this brochure are addressed to ordinary use of the
PRODUCT : any special uses of the PRODUCT will require diﬀerent
safety measures appropriate to the particular purpose or method ofuse.
・Please inform us if you ﬁnd any errors, omissions or questionable
descriptions.
・Reproducing or reproducing this brochure in any manner. in whole orin part. without the express permission of Nippon Shokubai isprohibited.
・In handling and using the PRODUCT in relation to the usage and/or
application referred to in this brochure. please pay attention toexistence of the intellectual property rights (including patent andits application) owned by any third party and avoid the possible
infringement of such intellectuaI property rights. Nippon Shokubai
shall in no event be responsible for any damages or liabilities
ariSing in connection with infringement or alleged infringement of
said intellectual property rights due to the adove-mentioned
handling and/or use of the PRODUCT.

For more detailed information,please contact to Paint & Coating Polymers Sales & Marketing Dept.(Tokyo, Osaka)

OsakaOﬃce
KoginBldg.
4-1-1 Koraibashi, Chuo-ku
Osaka 541-0043, Japan
Telephone : +81-6-6223-9245
Facsimile : +81-6-6223-9236
Tokyo0ﬃce
Hibiya Dai Bldg
1-2-2 Uchisaiwai-cho, Chiyoda-ku
Tokyo 100-0011, Japan
Telephone : +81-3-3506-7610
Facsimile : +81-3-3506-7746
URL http://www.shokubai.co.jp/
2021.12

Introduction

Table of contents

Epocros has been introduced to the market by Nippon Shokubai as world's ﬁrst commercializationof Oxazoline related product built on the basic technique of Dow Chemical Company USA as wellas the accumulated knowledge of Nippon Shokubai on synthetic organic chemistry and polymer
science.
Recently, worldwide expectation for developing environmentally safe product is becoming
prevalent and the trend is being accelerated toward the waterborne product against VOC andsolvent. With those background, Epocros is accepted and utilized by variety of customers.
Especially, as Epocros is realized on polymer structure which is quite rare for the crosslinkers, themarket is recognizing it as a crosslinker with extremely high safety.
This document provides the characteristics of each Epocros series with supplementary technicaldata which can be used for examples. If you need detailed technical information, contact oursales division.

Aplication areas of EPOCROS

Introduction

1

General Information on EPOCROS

3

Product line-up, properties and characteristics

4

Reactivity of the Oxazoline groups

5

Reaction with the carboxyl groups

5

Model reaction of Oxazoline groups (Ethyl Oxazoline / Propionic acid)5

Safety and Regulatory worldwide

6

Safety data

6

World wide Regulatory

6

References

7

General formulating consideration

7

Eﬀect of the neutralization agent on reactivity

8

Eﬀect of pH

8

Eﬀect of depending on types of neutralizer

8

Reactivity

9

Measuring swelling ratio with Xylene1

9(Observing the heating condition to be hardened)

Coatings
Adhesives,
Pressuresensitiveadhesives

Measuring swelling ratio with Xylene 2(Metals, Films, Papers,
Plastics, Leathers, etc.)(crosslinking at room temperature)

Fiber surface
conditioner

Binders fornonwovencloth

New markets

Paints, Ink

Customers'
speciﬁc ﬁelds(Exterior walls,
Building materials,
Metals, Automobiles)

Primer(Film, Plastics,
Building materials,
Automobiles)

01

9Film tensile strength test

9

Reaction mechanism of storage stability

10

Stability data of one packaging condition 1

10Stability data of one packaging condition 2

11

Improvement of Adhesion properties

11

Data of improving adhesion properties 1

11

Data of improving adhesion properties 2

12

Data of improving adhesion properties 3

12

EPOCROS RPS-l005

13

Characteristics

13

Examples of uses

13

Physical property basics of RPS-1005

14

Pigment
printing

02

General Information of

N

O

N

O

N

Product line-up, properties and characteristics

O

polymer chain

Product Type

Emulsion

Water soluble

Series name

K-2000 Series

WS Series

Product No.

K-2010E

K-2020E

K-2035E

Oxazoline group
N

O

N

O

AppearanceNON

Oxazoline functionalized reactive copolymer

O

Oxazoline group

Oxazoline functionalized reactive copolymer

Emulsion type (K-series)

Water soluble type (WS-series)

Soft

Type

03

Emulsion type

Water soluble typeK-2010E
K-2020E
K-2035E

WS-300WS-500WS-700

Clear yellow liquidHigh
oxazoline
VOC freeStandard

VOC free

10

39

25

Solvent

Water

Water

Water/PM＊7

Water

pH

7-9

7-10

8-10

7-10

Main components

Styrene/Acrylic

WPO＊1

550

130

220

Oxazoline
groups amount＊2

1.8

7.7

4.5

-50＊3

0＊3

Acrylic

50＊3

90＊3

50＊4

50＊4

Mn

N/A＊6

4×104

2×104

2×104

Mw

N/A＊6

12×104

7×104

4×104

Commoncharacteristics

Thermoplastic
Additive
Compatibilizer

Hard

None〜
Clear Red
Liquid

WS-70040

Molecular
Weight＊5

Classiﬁcation of

MiddleWS-500Nonvolatiles(wt%)

Tg(℃)

Waterborne
Crosslinker

Milky white emulsion

WS-300・VOC free, Long Pot life for one packaging
・Controllable appearance by Tg adjustment
・Improve water resistance, heat resistance andfilm properties
・Adhesion promoting particularly to polyester
・Fast drying
・Low-toxicity

・Long Pot life one packaging
・Higher reactivity in comparison with emulsion type・Improve water resistance, heat resistance andfilm properties
・Adhesion promoting for PET, OPP, PVC etc.
・Fast drying
・Low-toxicity

Figures shown in the above table are representative values ; these are not to be considered product speciﬁcation＊1 Equivalent Weight (Weight per oxazoline equivalent: nonvolatiles g/eq.) ; Theoretical value＊2 Oxazoline groups amount (mmol/g, nonvolatiles) ; Theoreticalvalue＊3 Calculated value＊4 Actual measurement＊5 Molecular weight (HPLC, g/mol)＊6 N/A: not available＊7 1-Methoxy-2-propanol

Granule type
RPS-1005

04

Reactivity of the Oxazoline groups

Safety and worldwide Regulatory

Reaction with the carboxyl groups

EPOCROS is a low toxic and highly safe crosslinker

1. Reaction with carboxyl groups which is contained in most of waterborne polymers is regarded to have thehighest reactivity.
2. After the reaction with the carboxyl groups, stable amid ester bonding is formed. Any by-product will not be
generated.
3.Reaction with carboxyl groups proceeds rapidly at elevated temperature 8O℃ to 100℃
4.Reaction with carboxyl groups proceeds slowly at room temperature.
5.Oxazoline groups have better reactivity with carboxyl groups than with epoxy groups.
6.Oxazoline groups also react with aromatics such as thiol groups as well as phenol groups, but oxazoline
groups cannot react with alcoholic hydroxyl groups.

HO
＋

O
O

R2

R1

O

Ames test

Schematic reaction between
Carboxyl groups and Oxazoline groups

R2

N
H

● Safety dataO

carboxyl groups

Skin temporaty irritant test

Acute toxicity

Fish toxicity（Rabbit）（Oral, Rat, LD50）（Killfish, LC50, 96hr）

K-2010E

Negative

None＞2000mg/kg＞1000mg/L

K-2020E

Negative

None＞2000mg/kg＞1000mg/L

K-2035E

Negative

None＞2000mg/kg＞100mg/L

WS-300

Negative

Slight irritation
Pll＝0.2＞2000mg/kg

N/A

WS-500

Negative

None＞2000mg/kg＞1000mg/L

WS-700

Negative

None＞2000mg/kg＞1000mg/L

O
＋ HS

S
R1

O

C

N
H

O

Aromatic thiol froups

R1

O

O

O

N

O

＋ HO

2-Oxazonline

R1

N
H
O

Phenol

N

C
OH

N

O

N/A : not available

NH

O
＋

● Legislation and Regulations (as of August 2021)

HO − R2

Alcohol

Crosslinked structure (Amide ester bonding)Model reaction of Oxazoline groups (Ethyl Oxazoline / Propionic acid)
100

100

120℃

100℃

80
Reaction rate (%)

Reaction rate (%)

80
80℃

60

60℃

40

×
20

Ethyl oxazoline

60

Phenyl glycidyl ether

40
20

20℃ × 6days
0

0
0

1

2

3

4

5

Reaction time (hrs)Model reaction of Oxazoline / Carboxyl groups(Ethyl Oxazoline / Propionic acid)

0

1

2

3

4

Reaction time (hrs)5

Law / Inventory
Country / regions

Law concerning
the Examination andRegulation of
Manufacture,etc,ofChemical substances

TSCA

REACH

KECL

IECSC

USA

EU
（EEA）

KOREA

CHINA

JAPAN
K-2010E○○○＊

Pre-registration

contact us

K-2020E

○

○

×

×

contact us

K-2035E○○○＊

Pre-registration

contact us

WS-300○○contact us○＊＊

contact us

WS-500○○○＊Pre-registration○

WS-700○○○＊Pre-registration○○ ：Registered○＊ ：Registered under limited tonnage○＊＊：Registered(need importer registration)
× ：Not Registered

Comparison between the reactivity ofOxazoline groups and Epoxy groups(Reaction with Propionic acid, 100℃)

Conditions on Reactivity : Ethyl oxazoline / Propionic acid = 1/1 (mol/mol), solvent-free reaction
Phenyl glycidyl ether / Propionic acid = 1/1 (mol/mol), solvent-free reaction
Method of analysis: Gas chromatography analysis

05

06

References
General formulating consideration:

Eﬀect of the neutralization agent on reactivity

If we could suppose that the reaction proceeds just like the theory, optimum quantity of Epocros as anadditive is 100mol%. However, under the eﬀects of reacting conditions as well as the eﬀects of otheradditives, 20 to1OOmol% is considered to be recommended in actual usages.

● Amount of the Oxazoline group contained in the EPOCROS (per g.NV＊)
K-2000
Series

WS-300WS-500WS-700

Amount of the Oxazoline group (mmo/g,NV＊)

1.8

7.7

4.5

4.5

Nonvolatiles(wt%)

40.0

10.0

39.0

25.0

As Oxazoline group has quite low reactivity with Carboxylate, it has good pot life when mixed withwaterborne resin which has neutralized carboxyl groups. While it is drying, as the neutralizing agents (suchas ammonia or amine etc.) are being evaporated, the reaction occurs. Crosslinking speed is tend to beaﬀected by the neutralizing agents for Carboxyl group. Therefore, when you need to harden it at low
temperature, combination with the waterborne resins which have highly evaporative ammonia as its
neutralizer is recommended.

● Effect of pH
・Crosslinking density is inversely related to swelling ratio. As ammoniacal neutralizers have highevaporation rate, it is rarely aﬀected by pH at elevated temperature (8O℃ and 120℃).
・At room temperature (23℃), as ammoniacal neutralizer can not evaporate well, it is highly aﬀected by pH.

Caution: Each value is theoretically calculated, not to be considered as speciﬁcation.

● Calculating method of the amount of Epocros additive regarding theamount of the base resin (Calculation of mol to be added)
Before the calculation, prepare the acid value and g,NV＊ of the base resin as well as the amount of theOxazoline and g,NV＊ in the crosslinking agent.
First. get the COOH mol amount from the acid value of the base resin by using formula A. Then substitute thevariables in formula B.
Formula A: COOH mol amount (mmol/g,NV＊) ＝ Acid value / 56.1 (Molecular weight of KOH:g/mol)
Acid value: Amount (mg)of the KOH potassium hydroxide which is required to neutralize the
COOH groups contained in 1g of NV＊ base resin.
COOH mol amount: Number of COOH mols contained in 1 g of NV＊ base resin.
Formula B (Calculating method of the adding amount of Epocros):
Amount of the ading Epocros (g) ＝ (Weight of the base resin (g) x (NV＊ ratio of the baseresin (%) / 100) x (Amount of COOH mol (mmol/g) / (Amount of Oxazoline group in the
Epocros (mmol/g)) / NV＊ ratio of the Epocros (%) / 100)

Swelling ratio with Xylene(wt%)

Effect of pH of emulsion on crosslinking density
Base resin : Acrylic copolymer (neutralized by ammonia)
Crosslinking agent : WS-500, 5wt%

6000
5000

Cure conditions

4000

23℃ × 1 day

3000

80℃ × 30min.
120℃ × 30 min.

2000
1000
0
5

6

7

8

9

pH of emulsion● Effect of depending on types of neutralizer
・Reactivity of Epocros is aﬀected by evaporation of neutralizer.
・At elevated temperature (120℃), neutralization by ammonia and triethylamine has similar reactivity

For example, suppose the main acid value of the base resin is to be 30(mg KOH/g NV＊) and the NV＊ ratio is to be 40.0%;

Effect of neutralizers (swelling ratio with water(%))

Amount to be added for K-2000 series (g) = (100 x (40 / 100) x 0.54) / 1.8 / (40 / 100)) = 29.4

(Base resin / Crosslinker : Acrylic copolmer(Emultion)/ -Model type(50% of oxazoline group for K-2020E(20wt%))

Amount to be added for WS-300(g) = (100 x (40 / 100) x 0.54) / 7.7 / (10 / 100)) = 27.5
Amount to be added for WS-500(g) = (100 x (40 / 100) x 0.54) / 4.5 / (40 / 100)) = 12.1
Amount to be added for WS-700(g) = (100 x (40 / 100) x 0.54) / 4.5 / (25 / 100)) = 18.8

Example: Maximum and minimum values of recommended amounts (wt%)
of Epocros to be added when each of them is used for the base resin with acid value30.
EPOCROS to be added

K-2000
Series

WS-300WS-500WS-70020mol%

5.9wt%

5.5wt%

2.4wt%

3.8wt%

100mol%29.4wt%27.5wt%12.1wt%18.8wt%Swelling ratio with Water(wt%)

By using the formula A. COOH mol amount of the base resin is decided to be 0.54(mmol/g, NV＊). (Calcullation: 30/56.1 = 0.53(mmol/g , NV＊)

70
60

Room temperature × 1 day

50

120℃ × 5min

40
30
20
10
0

Ammonia

Triethylamine

Sodium hydroxide

All case are neutralized up to 80%＊ NV:Nonvolatiles

07

08

References
Reactivity

Reaction mechanism of storage stability● Measuring swelling ratio with Xylene ① (Observing the heating condition to be hardened)
Base resin : Acrylic copolymer (emultion)
Swelling ratio with Xylene(wt%)

・By adding Epocros. swelling ratio with Xylene issuppressed, therefore solvent resistance is increased.
・Hardening performance is signiﬁcantly increased at 80℃
and above.
・WS-500 demonstrated better hardening performance
than K-2020E when same amount of additives were
provided.

3000

WS-500 (5%)

2500

K-2020E(5%)
K-2020E(12.5%)

2000［COOH］［OXAZOLINE］/＝ 100/16

1000
500

Swelling ratio with Xylene(wt%)

Base resin : Acrylic copolymer (emultion)

Hardening at room temperature

2500
WS-500(5%)
K-2020E(12.5%)

2000
1500
1000

14

K-2010E
Tg=-50℃

12

0

2

4

6

8

10

12

14

Crosslinking time (day), 23℃

Base resin : Acrylic copolymer (neutralized by ammonia)〔 COOH 〕/〔 OXAZOLINE 〕＝ 100 / 40
Cure conditions : 120℃ × 30 min.

Stress (MPa)

10

O

（

NH3

O

O
O

‒

H
N
+

）

O

■pH : Low←→High・Pot life : Short (two packaging)←→Long(one packaging)・Hardening temp : Low(room temp.)←→Midle・High(than 80℃〜100℃)

Neutralizer blocks carboxylic acid
→ React after volatilization→ Big inﬂuence by pH and neutralizer■Neutralizer :・NH3 : Oxazoline group can react at low temperature・Amine with high boiling temperature : Oxazoline group
can react at elevated temperature
・NaOH etc : Oxazoline group needs acid catalist to reactwith carboxyl groupBase resin : Acrylic copolymer (Emultion type, Acid value: 31mgKOH/g, nonvolatiles)
Storing condition: 50℃ × One month after mixing
・There is no signiﬁcant diﬀerence on pH, viscosity, and MFT performance when stored for one month after
mixing at 50℃. The tensile strength of ﬁlms formed from these mixture show almost same value in this test.
WS-500K-2020E

Control

Added ratio(phr)＊

5

5

0

Functional ratio of［COOH］［OX］/

100/40100/16Storage period

Initial

1monthInitial

1monthInitial

pH

7.6

7.4

7.5

7.3

7.3

Viscosity(mPa.s)

39

40

32

28

35

MFT(℃)

10

11

14

13

12

Swelling ratio(Xylene : wt%)

180

115

880

820

Dissoived(Water : wt%)

7

6

8

8

9

Dry(MPa)

12.7

13.2

7.8

8.0

5.9

Wet(MPa)

11.8

12.7

6.4

6.3

4.9

8

Crosslinking Characteristics

6
Without Eprocros
42

Tensile strength

0
0

200

400

600

800

1000

Strain (%)

Result of film tensile strength test
09+

● Stability data of one packaging condition ①

500

・By adding Epocros, ﬁlm tensile strength of the base resin is increased.
・Suitable Stress-Strain performance for each application can be obtained by selecting polymer Tg of K-series.

K-2020E
Tg=0℃

O NH4

O

［COOH］［OXAZOLINE］/＝ 100/40

Crosslinking of emulsion withcarboxyl groups at room temperature

K-2035E
Tg=50℃+

Higher crosslinking
density

Crosslinking temperature (℃), 30min.

0

-

H
N

［COOH］［OXAZOLINE］/＝ 100/40

050 60 70 80 90 100 110 120 130

3000

O

N

+

● Measuring swelling ratio with Xylene ② (Crosslinking at room temperature)● Film tensile strength test

O

1500

Crosslinking of emulsion with carboxyl groups

・By adding Epocros. swelling ratio with Xylene
decreased, therefore solvent resistance increased.
・It can be hardened under the room temperature.
However, signiﬁcantly long curing time is required to getenough performance.
・WS-500 demonstrated better hardening performance
than K-2020E when same amount of additives were
provided.

・The mixture of carboxylated resin and Epocros shows excellent storage stability under ambient conditions.
This is attributed to blocking eﬀect of neutralizers.
・As the neutralizer volatilizes, for example during the drying, the reaction is accelerated.
・The product can be prepared as one packaging

1200＊ phr : Parts per hundred resin (nonvolatiles)

10References● Stability data of one packaging condition ②

Epoxy / 100% neutralized

1000● Data of improving adhesion properties ②
Base resin: Chlorinated Polypropylene (Emulsion type, Acid value:13 mgKOH/g, NV)
Subtrate: Polypropylene test panel
Drying condition: 80℃ x 30 min.
Evaluation method: Peel test with pressure sensitive adhesion tape (at room temperature)×

Viscosity (mPa・s)

Base resin: Acrylic copolymer on the market (Emulsion
Acid value: 195 mgKOH/g nonvolatiles)
Storing condition: 50℃ x One month after mixing
・Epocros shows longer pot life in comparison with that ofwater-soluble epoxies.
・Pot life can be longer when base resin is over neutralized

Storing stability (Viscosity change)

WS-500/100% neutralized
WS-500/150% neutralized

100
0

5

10

15

20

25

30

Storing period at 50℃ (day)Improvement of Adhesion properties
・By adding Epocros, adhesion properties to various plastic substrates can be improved.
・The interaction between oxazoline group and hydrophobic group on surface promotes adhesion properties.
Furthermore, formation of covalent bond with carboxyl group on substrate surface results strong bonding.

Crosslinker

Amount ofaddition

Adhesion＊1

Water resistanceof adhesion＊2

No crosslinker

0%

＋/−

−−

K-2035E

10%

＋

＋/−

WS-5003%＋＋/−

Water soluble epoxy

3%

−−

−−

＋ : No peeling＋ / − : Partly peeled− : Peeled almost entirely−− : Entirely peeled＊1 at room temperature＊2 at room temperature after immersed in water for one day

Imaginary diagram
Base resin● Data of improving adhesion properties ③

Base resin
Ox

CONH
Ox

Ox

CONH

Epocros
Ox

Polar group

Ox
Ox
Polar group

Substrate

Base resin: Acrylic copolymer (Emulsion, Acid value: 39 mgKOH/g, Acryset EMN-260E(Nippon Shokubai Co., Ltd.))

Ox
Epocros

Ox

Ox

Formulation: Crosslinkers are added to provide 0.5mol of each functional groups against carboxyl groups
in the base resin.

NHCO

Substrate:PP (Polypropylene)
ABS (Acrylonitrile - Butadiene - Styrene) resin

Substrate(−Ox : Oxazoline group)

PC (Polycarbonate)
PMMA (Polymethylmethacrylate)● Data of improving adhesion properties ①

Drying condition: 150℃ x one minute

Base resin: Acrylic copolymer (Emulsion type, Acid value: 26mg KOH/g, NV)
Substrate: PET ﬁlm (100μm)
Drying condition: 150℃ x one min.
Evaluation method: Peel test with pressure sensitive adhesion tape (at room temperature)

Crosslinker

Amount ofaddition

Adhesion

Water resistanceof adhesion＊2

No crosslinker

0%

−

−−

K-2020E

5%

＋

＋/−

Water soluble melamine

3%

−

−−

Water soluble epoxy

3%

＋/−

−

K-2020E itself

100%

＋

＋/−

＋ : No peeling11＋ / − : Partly peeled＊1− : Peeled almost entirely＊1 at room temperature＊2 at room temperature after immersed in water for one day

Substrate

Crosslinker

Amount ofaddition

PP

ABS

PC

PMMA

No crosslinker

0%

−

−

＋

＋

WS-500

8%

−

＋

＋

＋

WS-700

8%

−

＋

＋

＋

Water soluble epoxy

6%

−

−

−

＋

＋ : No peeling＋ / − : Partly peeled− : Peeled almost entirely−− : Entirely peeled

PP (Polypropylene)
ABS (Acrylonitrile - Butadiene - Styrene) resin
PC (Polycarbonate)
PMMA (Polymethylmethacrylate)−− : Entirely peeled
12EPOCROS RPS-1005
Epocros RPS-1005 is an amorphia type reactive polymer which has oxazoline groups as its pendant. Byutilizing the characteristics of oxazoline groups as polar functional groups and high reactivity they have withcarboxyl groups, Epocros is expected to have wide variety of application ﬁelds in thermoplastic area ascompatibilizer and dispersing agent.

Physical property basics of RPS-1005● Structural formulaCH3

Imaginary diagram（

polymer B
polymer A

H2C

CH

）
（

H2C

m

C

）
n

N

O

polymer A● Properties

RPS-1005

polymer B＜ Boundary face ＞
Oxazoline group

Micro Domain structure : Matrix (Polymer A)
Domain (Polymer B)

Characteristics① Oxazoline groups have high reactivity with carboxyl groups. Being melted and kneaded with melt
polymers with carboxyl groups, they can quickly generate graft polymers.
② It has highly stable viscosity when melted and kneaded under high temperature.
③ Customers can utilize polarity and ionic interaction arisen from oxazoline groups.

Examples of uses
・Compatibilizer
By utilizing the reactivity of the oxazoline groups, Epocros can realize micro dispersion of dispersing phaseas well as improving physical characteristics of moldings (especially improvement on impact strength)
・Auxiliary agent for dispersing
Epocros can improve the dispersing status of pigments, ﬁre retardants and bulking agents which are
added into thermoplastic resins.
・Acid trapping agent
Epocros can improve heat stability of the moldings by trapping free acids generated in thermoplastic resins.
・Polymer chain extending agent
Epocros can improve viscosity of melting resins by introducing brunch structure using oxazoline groups as
the reactive sites.
・Extruded laminated bodyLaminated structure and laminated ﬁlms can be generated without inserting adhesive layers between
each layer by utilizing the reactivity between oxazoline groups and carboxyl groups contained inthermoplastic resins (ex. PET and / or Acid altered polyoleﬁn)・Dielectric constant reducer
The oxazoline group is used as a reaction point, and the dielectric constant is lowered by introducing a styrene unit.
13

Items

Property

Unit

Testing method

Main structure

Styrene−−Appearance

White granule−−Density

1.05

g/cm3

JIS7112(B)Amount of Oxazoline groups

0.27mmol/g・solid

Calculated Value

Mn

Approx. 70,000

g/mol

Mw

Approx. 160,000

g/mol

GPC
(Corresponding value tostandard polystyrene)

109℃

DSC method

Molecular weight

Glass transition temperature (Tg)
Thermal decomposition
temperature

320℃

TG-DTA method weightdecreasing temperature(measured under
air atmosphere)

Melt flow rate (MFR)

6-10

g/10min

200℃, load 5Kg

Figures shown in the adove table are representative values; these are not to be considered product specifications● Regulations
Registering status
CAS No.

30174-74-4

Law concerning the Examination and Regulationof Manufacture,etc,of Chemical substances

6-1961

Industrial Safety and Heaith Law

9-650

TSCA［USA］

Registered

REACH［EU］

Not Registered

KECL［KOREA］

Phase in substance

IECSC［CHINA］

Registered

Fire Service Law

Nominated as a flammable material,synthetic resin14