Showa Denko Chloroprene

(CR) is a type of synthetic

rubber used as an elastomer

in the automotive (belts and

hoses), construction (waterproofing and sealing),

wire and cable, adhesives, and countless other

industries. Showa Denko Chloroprene has been

produced for over 50 years and continues to expand

its application fields. The properties of Showa

Denko Chloroprene is highlighted by the a wide range

of resistances to sun, ozone, and weathering, many

oils and chemicals, low and high temperatures,

flame, and toughness against abrasion and general

wear. The versatile properties have long been the

key to Showa Denko Chloroprene’ s utility as a

multi-purpose rubber. The product is available in

over 40 grades, produced as either a dry chip or

aqueous dispersion (Latex).

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What is Showa Denko Chloroprene?Elasticity Oxidation resistance Heat resistance

Compression set

Abrasion resistance Flame resistance

Low temperature resistance

Insulation resistance

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

Poor Excellent Poor Excellent Poor Excellent

Poor

Oil resistance

CRNR

SBRNBR

EPDM

Poor Excellent

Excellent Poor Excellent

Weather resistanceGas transmission resistance

CRNR

SBRNBR

EPDM

CRNR

SBRNBR

EPDM

Poor Excellent Poor Excellent

Ozone resistance

CRNR

SBRNBR

EPDM

Poor Excellent Poor Excellent Poor Excellent Poor Excellent

Well balanced elastomer CR

*These figures are only for reference purposes and therefore do not serve as specifications

Polychloroprene Rubber

Historical Overview

Process (Butadiene)

Dry Latex

Butadiene Chlorine

Monomer Synthesis

CausticSoda

Resin

Modifier

Dichlorobutene Synthesis and Refining Process

Drying Process

Chlorobutadiene Synthesis and Refining Process

Emulsification, Polymerization

Emulsion

Finishing &Packaging

Polymerization

DCB

CD

Paperbag（Skid/Pallet）● IBC/Tote

ISO Tank●

●Flexi-bag●

DichlorobuteneDCB Chlorobutadiene(or chloroprene) monomerCD

LocationPlant: Kawasaki, Japan

Process1963: Started production with Acetylene process1972: Converted to butadiene process, developed by DuPont, 　　 for safety concerns

Footprints1960: Established Showa Neoprene (Showa Denko 50% ,DuPont 50%)1963: Started Neoprene production at Kawasaki with DuPont technology2002: Terminated JV and started CR business as Showa Denko

Quality & Environment ManagementISO9001, ISO14001, OSHMS

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Foam to foam, Shoe sole bonding, Contact adhesive, High pressure laminate, Metal bonding

Water-based adhesives

Showa Denko Chloroprene latex grades are emulsions of polymerized chloroprene dispersed in water; containing emulsifying agents and stabilizers.  The latex grades are viscous, o�-white, liquids which range in solid content from 47% to 60%.  Showa Denko chloroprene latex is available in over 15 di�erent grades, each tailored to meet the requirements of speci�c end uses.

Surgical gloves, Industrial gloves, Medical breathing bags

Dipped goods

It is intended for use by persons having technical skill, at their own discretion and risk.　Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your Showa Denko customer service representative.

LATEX Aqueous Dispersion

Asphalt emulsion, Mortar modi�cation, Water proof coating, Roo�ng

Construction & Coating

Sealant, Mattress, Textile coating, Flame retardant foam

Others

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Showa Denko Chloroprene is available in a dry chip form. There are around 30 dry grades that cover a wide range of properties and performance to meet the requirements from automobile, adhesive, construction and general rubber industry �elds.

It is intended for use by persons having technical skill, at their own discretion and risk.　Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your Showa Denko customer service representative.

DRY CHIP General Purpose 5

Bearing pad, Joint, Rubber sheet

Construction

Sponge, Escalator handrail, Mattress

Others

Transmission belt, Hose, Engine mount

Automotive

Foam to foam, Carpet backing, High pressure laminate

Adhesive

Conveyor belt, Gasket, Boots seal,O-ring, Wire and cable

Industrial

CR Business Global Network

Country/CityGermany/Munich

■ Sales office

Company NameShowa Denko Europe GmbH

Country/CityJapan/Kawasaki

■ CR business headquarters, sales office, plant, R&D

Company NameShowa Denko K.K.

USA/New York Showa Denko America, Inc.Singapore/Singapore Showa Denko Singapore (Pte.) Ltd.China/Shanghai Showa Denko (Shanghai) Co., Ltd. Korea/Seoul　 Korea Showa Chemicals Co.

Profile Showa Denko K.K.

PetrochemicalsOlefins (ethylene and propylene) and organic chemicals(vinyl acetate monomer, ethyl acetate and allyl alcohol)

ChemicalsFunctional chemicals, basic chemicals, industrial gases, high-purity gases, Polychloroprene (CR) , and chlorinated polyethylene (CPE).

ElectronicsHard disks (HDs), compound semiconductors (LED chips), and rare earth magnetic alloys

InorganicsGraphite electrodes and ceramics (alumina and abrasives)

AluminumRolled products specialty components, and beverage cans

OthersLithium-ion battery (LIB) materials, building products, and general trading

Since its foundation in 1939, Showa Denko K.K. has been one of Japan’s leading chemical manufacturers. For more than 70 years we have responded to the changing needs from various markets by continuously developing new chemicals and products in close cooperation with our customers.

Europe

North AmericaAsia

Asia

JAPAN

About us 6

Fast SlowCrystallization Rate

Sol(

Low

)H

igh

400

SD100 SD77S SND57 SD81

671A AE101

654

SD78

Coating, Binder

Asphalt Modification

Dipped Goods (Glove)

Adhesives

572 842A571

115

Cohesion ↑Tensile strength ↑Hardness ↑

Cohesion ↑Tensile strength ↑Hardness ↑

Low temp. resist ↑Dry tack ↑Elongation ↑

Low temp. resist ↑Dry tack ↑Elongation ↑

753

750 650

Gel

Co

nte

nt

LATEX APPLICATION MAP BY CRYSTALLIZATION VS. GEL CONTENT 7

AnionicCopolymer

11.5

1.151.41

8

37

High gel

Very highHighSlow

Very highHigh

Extremely fast

Bondedfibers

Coatings

Adhesives

Adhesives

Dipped goods

Non-wovenfabric

Low modulus

Excellent elasticity

Adhesives

Dipped goods

Non-wovenfabric

Low modulus

Acceleratorfree

Dipped goods

Adhesives

Foam

Sealant

High solid same polymeras 750

Dipped goods

Fabric impregnation (Binder)

Treated paper

Bonded fibers

Dipped goods

Coatings

Carpet backing

Dipped goods

Adhesives

Bonded fibers

Treated paper

Mastics

Adhesives Adhesives Pressuresensitiveadhesives

Primer

Adhesives

Good quickbreak withexcellent stability

Adhesives

Excellentquick breakwith decentstability

Adhesives Elasticizedportlandcement

Sealants

Coatings

Asphaltemulsion

Colloidalstability atlow pH

Contact adhesives

Coating

Mastics

Sealant

Asphaltemulsion

AnionicHomopolymer

12.5

1.131.23

40

41

Low gel

MediumHigh

Medium

LowMedium

Medium-fast

AnionicHomopolymer

12

1.111.23

15

38

High gel

Medium Medium

Fast

Medium Med.-highVery slow

AnionicHomopolymer

12.5

1.131.23

40

41

Med-high gel

Very highHigh

Med.-fast

HighHigh

Medium-fast

AnionicHomopolymer

11.5

1.11123

10

38

High gel

MediumMedium

Fast

HighMedium Very fast

AnionicHomopolymer

11.5

1.11123

10

38

High gel

MediumMedium

Fast

HighMedium

Slow

AnionicHomopolymer

12.5

1.131.23

35

41

Sol

LowMedium-high

Slow

Medium Medium Medium

AnionicHomopolymer

12.5

1.121.23

300

38

Sol

Very highHighSlow

HighHigh

Extremely

AnionicHomopolymer

12.5

1.121.23

300

38

Sol

Very highHighSlow

HighHigh

Extremely

AnionicHomopolymer

12.3

1.131.23

30

40

Med.gel

Very highHigh

Med.-fast

HighHigh

Medium-fast

Non ionicHomopolymer

12.5

1.131.23

200

36

Med-high gel

HighHigh

Med.-fast

High-mediumHigh-mediumMedium-fast

Non ionicCopolymer

7

1.091.24

300

47

Med.gel

HighMediumMedium

Medium Medium

Slow

Contact adhesives

Pressuresensitiveadhesive

Non ionicCopolymer

7

1.081.23

200

47

Sol

LowLowSlow

Low Low

Very slow

AnionicCopolymer

AnionicCopolymer

AnionicCopolymer

12

1.121.23

10

39

Med.gel

HighHigh

Medium

LowMedium

Extremely slow

12

1.121.23

10

39

High gel

HighHigh

Medium-fast

LowMedium

Extremely slow

12

1.131.23

400

39

Med.gel

HighHigh

Medium

LowMedium

Extremely slow

pH, 25℃Specific gravity, 25℃ Latex Polymer

Surface tension, dyn/cm, 20℃

Polymer type

Tensile strengthElongation

ModulusTensile strengthCrystallization rate

Emulsifiers

PolarityHomo/Copolym.

＊1)

＊1） : pH values decline slowly upon ageing. ＊2） : Spindle No.2Note

49 59 50 59 50 50 58 55 55 60.5 59 47.5 46.550 50 60

Ozone and weather

resistanceLow modulus Fast curing

Water based adhesives for

foam bonding

Water based adhesives for

foam bondingNon-ionic Non-ionicExcellent flexibility

Water based adhesives for high pressure

laminate

Good wet strength

Fast crystallizing

General purpose

Good tackiness

Grades

Main Feature

Physical Characteristics

Wet gel properties

Cure rateCured Film Properties

400 750 753 650 654 842A 671A 572 571 SND57 SD77S SD100 SD78 AE101 115

・

・・

・・・

・・

・・・

・・

・・・・・

・・

・

・・・・

・・・・

・

・ ・ ・

・

・・

・・

・ ・

・・・

・

・

・・・・

Non-ionic

SD81

・

・

＜

Resinate Resinate Resinate Resinate Resinate Resinate Resinate Resinate Resinate Resinate Resinate Resinate Resinate

96 90 110 73 78 47 81 92 88 40 77 78 95 77 95 40

Polyvinylalcohol

Resinate,Non-ionic

Polyvinylalcohol

The information set forth herein is furnished free of charge and is based on technical data that Showa Denko K.K. believes to be reliable. It is intended for use by persons having technical skill, at their own discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Because conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on any patents. CAUTION: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your Showa Denko customer service representative. Showa Denko Chloroprene is a trademark of Showa Denko K.K. Copyright 2016　 Showa Denko K.K. All Rights Reserved.

*2) *2) *2)

＜

Solids Content, %

Primary Applications&

Other Characteristics

Brookfield viscosity, mPa・s, 25℃(Spindle No.1, 30rpm)

Softening point, ℃(Creeping temp)

SHOWA DENKO CHLOROPRENE LIQUID DISPERSION PROPERTIES (Typical Values)　 8

ACAD

AD40 AG

AF

Fast SlowCrystallization Rate

Mo

on

ey V

isco

sity

, 　M

L1+

4' @

10

0℃

150

100

50

30

0

WXKT

WXK

SND5

SND8WXJK

WHV140

WHV

WHV100 TW100

TW SND22 WRT TRT

SND43

SND45

SND37

SND48

WD

WKWM1

GNADS

W WXJ

SND35

WB GRTGW

PLOT OF DRY GRADES CRYSTALLIZATION RATE VS. MOONEY VISCOSITY 9

10

Note ＊： Brookfield viscosity of 5% raw polymer solution in toluene at 25℃, [mPas]　　 ＊＊： Brookfield viscosity of 10% raw polymer solution in toluene / hexane（60/40 vol / vol） at 25℃, [mPas]

GENERAL PURPOSE

SHOWA DENKO CHLOROPRENE DRY GRADE PROPERTIES (Typical Values)

** * * *

*

*

The information set forth herein is furnished free of charge and is based on technical data that Showa Denko K.K. believes to be reliable. It is intended for use by persons having technical skill, at their own discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Because conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on any patents. CAUTION: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your Showa Denko customer service representative. Showa Denko Chloroprene is a trademark of Showa Denko K.K. Copyright 2016　 Showa Denko K.K. All Rights Reserved.

GNGRTGWW

WM1WHV

WHV100WHV140

WXJSND5SND8WRTWDWB

WXKWXKTSND37

WKWXJK

SND35SND43SND45

TWTW100SND22SND48

TRTAC

ADSAD

AD40AFAG

42－5934－5234－5242－5134－41

109－130 95－105100－150

42－5167－7632－3742－51

100－12042－5173－89

106－11773－8942－5142－5163－7378－8860－7342－51

85－10242－51

85－10042－5131－4310－3533－46

76－115 40－115 80－130

MediumSlowSlow

MediumMediumMediumMediumMedium

Very SlowVery SlowVery Slow

Extremely slowExtremely slow

MediumVery SlowVery SlowVery SlowMedium

Very SlowExtremely slowExtremely slowExtremely slow

MediumMedium

Very slowVery slow

Extremely slowVery fastVery fastVery fastVery fast

SlowMedium-Slow

Non-staining, sulfur modified G type with best tear strength and flex resistanceGood low temperature properties, G type with best tack for frictioning applicationSulfur modified G type with better heat and compression set resistance than GNStandard grade for general purposes Lower viscosity version of WHigher viscosity version of W for high loading application and general adhesivesLower viscosity version of WHVFor high viscosity adhesiveGood low tempetature properties for general useHigher viscosity version of WXJLower viscosity version of WXJExcellent low temperature propertiesHigher viscosity version of WDBest extrusion and calendering propertiesGood low temperature properties with better extrudabilityHigher viscosity version of WX-K for high loading useBetter extrusion version of WX-K with improved mold releaseBetter mold release version of W with good mill-and flow-abilityImproved mold release version of WXJ with good mill-abilityMore excellent low temperature properties of WRT with improved mold release for injection molding goodsHigher viscosity version of SND-35 with less shrinkageMore excellent low temp. and improved brittleness temp. version of WRT with improved mold release for injection molding goodsSuperior extrusion and calendering grade with good tensile propertiesHigher viscosity version of TW for high loading useGood low temperature properties with better extrudabilityHigher viscosity version of SND-22 with better calender-ability and extrusion-ability having colapse resistanceExcellent low temperature properties with better processabilityAdhesives and paints use with good breakdown propertiesLow solution viscosity version of AD. Low VOC adhesive potentialAdhesives and paints use with good solution viscosity stabilityHigh solution viscosity version of ADExcellent hot bond strength, carboxylatedExcellent sprayability, thixotropic

(Extrusion & calendering)

(Low mold fouling group)

(Specific group for extrusion, calendering)

(Adhesive application)

W Types

W Types

T Types

A Types

(Sulfur-modified group)

(Basic group)

(Crystallization resistant group)

G Types

(Adhesive application)W Types

W Types

W Types

Grades Other CharacteristicsMooney Viscosity[ML 1+4, 100℃]

CrystallizationRateType

The information set forth herein is furnished free of charge and is based on technical data that Showa Denko K.K. believes to be reliable. It is intended for use by persons having technical skill, at their own discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Because conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on any patents.

CAUTION: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your Showa Denko customer service representative. Showa Denko Chloroprene is a trademark of Showa Denko K.K. Copyright 2016　 Showa Denko K.K. All Rights Reserved.

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