Showa Denko America

Functional elastomer providing a good balance of important properties for a wide variety of applications

Showa Denko has been manufacturing Polychloroprene in both solid and liquid dispersions for over 50 years with consistent, high quality performance and customer satisfaction. Showa Denko had a joint venture with DuPont from 1963 up until 2002 and continues to use the same manufacturing methods, formulations, and technology.

Polychloroprene is used in a wide variety of applications, including but not limited to: adhesives, asphalt emulsions, bridge bearings, coatings, general rubber parts, hoses, medical devices, textiles, waterproof membranes. Polychloroprene offers a good balance of properties over other elastomers, such as: high elasticity, oxidation resistance, heat resistance, oil resistance, low temperature resistance, compression set, weather resistance, ozone resistance, abrasion resistance, and flame resistance.

Product Name: Showa Denko Chloroprene
Chemical Name: Polychloroprene
HS Code Number: Dry 4002.49.00, Latex 4002.41.00

Footprints:

1960 Established Showa Neoprene (JV: SDK 50%,Dupont 50%)
1963 Started Neoprene local production at Kawasaki.
2002 DuPont/Showa Denko joint venture terminated. Showa Denko took over 100% of the Chloroprene production plant in Japan.
2010 United States of America – Anti-Dumping Duty on Japanese chloroprene was lifted.
2012 First U.S. warehouse opened in Cincinnatti, OH.
2012 Second U.S. warehouse opened in Rancho Cucamonga, CA.

Grade Selection Guide (PDF)

Sample Request Form (Word Document)

General Brochure (PDF)

Liquid Dispersion – Latex:

Showa Denko Latex is available in both anionic and non-ionic forms.

Grade Polarity Solid content(%) Polymer Structure Crystallization Rate Other Characteristics
Gel Content Homo /Copolymer
400 Anionic 50 Medium Copolymer Extremely fast Ozone,Weatherability
750 Anionic 50 Medium Copolymer Extremely slow Flex, excellent elasticity
752 Anionic 50 Medium Copolymer Extremely slow Flex resistance elasticity (soft) very low modulus
753 Anionic 50 Medium Copolymer Extremely slow Flex, excellent elasticity with accelerator-free
650 Anionic 60 Medium Copolymer Extremely slow High solid version of LD750
654 Anionic 59 Low Copolymer Low Low modulus
842A Anionic 50 High Homopolymer Very slow High cure rate
671A Anionic 59 Med-High Homopolymer Medium-Slow High wet gel strength
AE101 Non ionic 59 Med-High Homopolymer Medium-Slow Colloidal stability at low pH
572 Anionic 50 High Homopolymer Fast Quick Grab strength
571 Anionic 50 High Homopolymer Slow General Purpose, High cure rate
115 Non ionic 47.5 Low Copolymer Slow Carboxylated,Hot bond strength
SD77S Anionic 55 Sol(No gel) Homopolymer Very fast Quick break for foam bonding
SD100 Anionic 55 Sol(No gel) Homopolymer Very fast Excellent Quick break for foam bonding
SND 57 Anionic 58 Sol(No gel) Homopolymer Medium Tackiness, very low MW
SD78 Anionic 60 Med-High Copolymer Fast-Medium Wood High Pressure Laminate

Dry Grades:

Showa Denko Chloroprene has four different types: A, W, T and G.

Dry Grade - General Purpose

Grade Mooney Viscosity
[ML 1+4,100℃]
Crystallization Rate Other Characteristics
G Types (Sulfur-modified Group)
GN 42-59 Medium Non-staining, sulfur modified basic G type with best tear strength and flex resistance
GRT* 40-54 Slow Good low temperature properties G type with best tack for frictioning application
GW 37-49 Slow Sulfur modified G type with better heat and compression set resistance than GN and GRT
W Types (Basic Group)
W 42-51 Medium Standard grade for general purpose
WM1* 34-41 Medium Lower viscosity version of W
WHV 109-130 Medium Higher viscosity version of W for high loading application and general adhesives
WHV100 95-105 Medium Lower viscosity version of WHV
W Types (Crystallization Resistant Group)
WXJ 42-51 Very Slow Good low tempetature properties for general use
SND5 67-76 Very Slow Higher viscosity version of WXJ
SND8* 32-37 Very Slow Lower viscosity version of WXJ
WRT 42-51 Extremely slow Excellent low temperature properties
WD 100-120 Extremely slow Higher viscosity version of WRT for high loading use
W Types (Extrusion & Calendering)
WB 42-51 Medium Best extrusion and calendering properties
WXK 73-89 Very Slow Good low temperature properties with better extrudability
WXKT 106-117 Very Slow Higher viscosity version of WX-K for high loading use
SND37 73-89 Very Slow Better extrusion version of WX-K with improved mold release
W Types (Low Mold Fouling Group)
WK 42-51 Medium Better mold release version of W with good mill-and flow-ability
WXJK 42-51 Very Slow Improved mold release version of WXJ with good mill-ability
SND35 63-73 Extremely slow More excellent low temperature properties of WRT with improved mold release for injection molding goods
SND43 78-88 Extremely slow Higher viscosity version of SND-35 with less shrinkage
SND45 60-73 Extremely slow More excellent low temp. and improved brittleness temp. version of WRT with improved mold release for injection molding goods
T Types (Specific Group for Extrusion, Calendering)
TW 42-51 Medium Superior extrusion and calendering grade with good tensile properties
TW100 85-102 Medium Higher viscosity version of TW for high loading use
SND22 42-51 Very slow Good low temperature properties with better extrudability
SND48 85-100 Very slow Higher viscosity version of SND-22 with better calender-ability and extrusion-ability having colapse resistance.
TRT 42-51 Extremely slow Excellent low temperature properties with better processability

* Please contact your regional account representative for supply availability.

Dry Grade – Adhesive Application

Grade Mooney Viscosity
[ML 1+4,100℃]
Crystallization Rate Form Other Characteristics
W Types
W 42-51 Medium Chip/Slice Most common grade
WM1 34-41 Medium Chip Lower viscosity version of W.
WHV 109-130 Medium Slice Higher viscosity version of W.
WHV100 95-105 Medium Chip/Slice Lower viscosity version of WHV.
WHV140 86-130 * Medium Slice For high viscosity adhesive
WHV200*** 180-300 * Medium Chip For further high viscosity adhesive
WXJ 42-51 Very slow Chip Soft film and high tack at low temperature.
WRT 42-51 Extremely slow Chip Extremely soft film and high tack at low temperature.
A Types
AC 31-43* Very fast Chip Adhesives and paints use with good breakdown properties
ADS 10-35* Very Fast Chip Low solution viscosity of AD, low VOC adhensive potential
AD 33-46* Very fast Slice Adhesives and paints use with good solution viscosity stability
AD40*** 76-115* Very fast Slice High solution viscosity version of AD
AF 45-115** Slow Chip Excellent hot bond strength. Carboxylated.
AG 80-130 Medium-Slow Slice Excellent sprayability, thixotropy.

* 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]
*** Produce to Order

Packing of Chloroprene Rubber

Paper Bag
25kg or 20kg/Bag
(55.10lb or 44.08lb/Bag)

EVA Bag
25kg (55.10lb)/Bag
Melting Point at 90⁰C(194⁰F)

Skid/Pallet
1,000kgs (2,204lb)/Pallet
16 pallets in a 20ft container
16,000kgs (35,264lb)

IBC
Net: 1110kg (2,442lb)
Gross: 1170kg (2,574lb)
Size: 1200 X 1150 X 1100mm

ISO Tank
Approx. 5,000 gallons
or 44,000lb or 20MT
wet weight