DENKA

Product Information

DENKA CHLOROPRENE

Product Information

Outline

Chloroprene rubber has many superior characteristics compared to natural and even other synthetic rubber types, so it has numerous applications. In particular, its possible uses have been expanded to civil engineering/construction and precision components as well. Our company meets such needs by providing a wide range of grades such as special denatured types, and latex best suited to making aqueous adhesives, etc.

Characteristics

Chloroprene rubber demonstrates a good balance of features, including such as resistance to ozone, oil and heat; flame retardancy, weatherability, special cohesiveness, etc., and is very easy to process.

Uses

  • Electrical wiring and cables
  • Automotive components
  • Belts, hoses
  • Coated cloth, foam rubber
  • General industrial articles
  • Adhesives, etc.

Related Information

Comparison between Chloroprene Rubber and Other Rubber

Compared with natural rubber and other synthetic rubber, chloroprene has many excellent properties. A comparison of the properties of 8 kinds of rubber are shown in the follow table.
The data show that properties of chloroprene are superior to those of the other rubbers in general. Taking advantage of these excellent properties, chloroprene rubber is now used for a wide range of applications.

Comparison of the Properties of Chloroprene with those of Other Types of Rubber
Mechanical strength Low temperature brittleness Deterioration stance Processing characteristics Adhesion properties
Tensile strewngth Elongation Tear strength Permanent set Heat resistanvt Ozone resistance Oil resistance Flame resistance
CR
(Chloroprene rubber)
E E
F~E
E F 120°C F F F E E
NR
(natural rubber)
E E E E E 100°C P P P E E
SBR
(styrene butadiene rubber)
F F G F E 100°C P P P E E
NBR
(nitrile butadiene rubber)
F F F F G
120°C
P E P E F
EPT
(ethylene propylene rubber)
F F G G E 150°C E P P E P
CSM
(chlorosulfonated polyethylene)
F G F G F 140°C E F F F F
CHC
(epichlorohydrin rubber)
G G F G G 140°C E F F P E
ACM
(acryic rubber)
P G G P G 160°C E F P G F

E: Excellent
F: Fair
G: Good
P: Poor

Applications of "DENKA CHLOROPRENE"

(1) Wire and Cable

"DENKA CHLOROPRENE" is used as the sheath for wire and cable.

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(2) Automotive rubber parts

"DENKA CHLOROPRENE" has applications such as for mechanical parts in automobiles including air suspensions, constant-velocity joint boots, rack and pinion boots, power steering hoses, brake hoses and other hoses, various transmission belts, gaskets, dust seals and isolation materials for which oil resistance and deterioration resistance are indispensable.

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(3) Belts/hoses

"DENKA CHLOROPRENE" is widely used for conveyer belts that are used for mining and similar fields, conveyer belts for carrying high-temperature or burning materials such as coke, transmission belts, and other flat and V-belts. "DENKA CHLOROPRENE" is also used for various hose covers and tubes.

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(4) Rubber lining / Sponge / Wetsuits

"DENKA CHLOROPRENE" is widely used in the form of rubber lining for various applications such as container bags, cover sheets, tents, leisure boats, rescue boats, and flame retardant wear for fire fighters, etc.
"DENKA CHLOROPRENE" is also used for sponges which have a low specific gravity, for wetsuits used in marine sports, and as cushion rubber to protect against danger to human life by fire, etc., in aircraft, boats, and automobiles.

(5) Rubber products for general purposes/new fields

"DENKA CHLOROPRENE" is used for rubber rollers in offset printing presses which utilize water and oil to print, as rubber rollers which are exposed to oil and high temperatures in steelmaking, and as pads and packings, gaskets and dust seals for various types of machinery. Recently, in addition to is wide use for automobile parts and rubber products for general industries, there are great expectations for new applications of "DENKA CHLOROPRENE" in the civil engineering and construction fields including as tunnel segment seal gaskets and elastomeric isolators for bridges as well as for various marine-related rubber parts.

(6) Adhesives

Among many kinds of rubber adhesives, those which are based on "DENKA CHLOROPRENE" have established a firm reputation in various application areas, since it has good applicability and has various excellent adhesion properties.
Recently, "DENKA CHLOROPRENE LATEX" is being used as a solvent free adhesive.

More Information

A special synthetic rubber, "DENKA CHLOROPRENE," which was developed and produced based on DENKA's own technology, has easy processing characteristics and excellent properties with remarkable durability under severe condition such as:

  • weather resistance;
  • ozone resistance;
  • oil resistance;
  • abrasion resistance;
  • flame resistance;
  • heat resistance; and
  • excellent adhesion properties.

Ever since DENKA successfully developed "DENKA CHLOROPRENE" in 1962, its excellent characteristics and applications have been widely recognized and the demand for "DENKA CHLOROPRENE" has steadily increased. At present, these products are shipped throughout Japan, and more than half of the production is exported to more than 50 countries worldwide.

Typical Grades of "DENKA CHLOROPRENE"

Sales of "DENKA CHLOROPRENE" were started with four grades in October, 1962. Since then, new types have been successively added to meet the requirements of customers. The following introduces the major product types for many "DENKA CHLOROPRENE" products.

(1) General
※at production
Type Crystallization Rate Moony Viscosity Typical Apprications/ Properties
M-40 Medium 48±5 General purpose, cables, belts, hoses, other industrial goods
M-41 Medium 48±5 Same purpose as M-40, but with less roll sticking and mold staining
M-30 Medium 38 General purpose, the same as M-40 with low viscosity
M-100 Medium
100±10
Indsutrial goods(for high loading)
M-120 Medium 120±10 sheets, packing, hoses, other industrial goods(for high loadings)
S-40 Slow 48±5 Industrial goods/ low temperture resistance
S-41 Slow 48±5 Same purpose as S-40, with less roll sticking and mold staining
S-40V Very slow 48±5 Same purpose as S-40, improved low temprature resistance, less roll sticking and mold staining
ES-40 Very slow 43±5 Calenderd sheets, extruded goods with precise shapes and low temperture resistance
ES-70 Very slow 75±5 Same purpose as ES-40, with high viscosity(for high loading)
EM-40 Medium 48±5 Calenderd sheet, extruded goods with pracise shapes
MT-40 Medium 48±5 Calenderd sheet, extruded goods/ well-balanced in extrusion characteristics and mechanical strangth
MT-100 Medium 95±10 Extruded goods(for high loading)
PM-40 Medium 50±10※ Sulfur-modifired type suitable for belts, sponges, cable cover material and as a shock absorber
PM-40NS Medium 50±10※ Same purpose as PM-40, especially for non-discoloring or non-standing goods
PS-40A Slow 30-55※ Same purpose as PM-40NS/ improved storage stabillity and low temperature resistance
(2) DCR Series: for Special Applications
Type Crystallization Rate Moony Viscosity Typical Apprications/ Properties
DCR-30 Very slow 120±10 Indstrial goods/ low tempreture resitance(for high loading)
DCR-31 Very slow 80±10 Same purpose as DCR-30, with low viscosity
DCR-34 Slow 65±7 Indsutrial goods/ high heat resistance and mechanical strength
DCR-36 Very slow 80±10 Indstrial goods, suitable for injection molding/ low tempreture resistance
DCR-40 Slow 40-55 Sulfur-modifired type, suitable for belts, sponges and molded goods
DCR-40A Slow 35-50 Sulfur-modifired/ improved heat resistance and strage stability
DCR-42A Medium 40-55 Cables, heses/ high performance and high loading
DCR-66 Very slow 60-80 Auto parts (CVJ boots etc.)/ high loading and high performance with low temprature resistance
(3) Adhesives
Type Crystallization Rate Moony Viscosity Typical Apprications/ Properties
A-90 Fast 48±4(a) General purpose, most commonly used type
A-91 Fast 48±4(a) Suitable for two-part adhesives, faster reactivity with isocyante
A-90S Fast 48±4(a) Same purpose as A-90 / less discoloration in MMA grafted adhesives
A-30 Fast 20±3(a) Lowest viscosity type, suitable for spray type adhesive
A-70 Fast 40±3(a) Same purpose as A-90, with low viscosity
A-100 Fast 57±4(a) Same purpose as A-90, with high viscosity
A-120 Fast 67±5(a) High viscosity type
A-400 Fast 500-1000(b) Extremely high viscosity type, modifier of solution viscosity and bonding strength
TA-85 Fast 44±5(a) Thiuram stabilized type, combined use with A-type or TA-type adhesives
M-130L Medium 1000-1500(c) Contact cement type, combined use with A-type or TA-type adhesives
M-130H Medium 1510-2700(c) Same prupose as M-130L, with high viscosity
DCR-11 Medium or less 80(d) Mastic type adhesive, thixotropic effect
DCR-15H Fast 2710-4000(c) Suitable for higher viscosity adhesives than those made with DCR-15L

(a): Mooney viscosity MS 2+2.5 at 100140°C
(b): Solution viscosity (m Pa s) = 5% toluene solution
(c): Solution viscosity (m Pa s) = 10% toluene solution
(d): Mooney viscosity ML 1+4 at 100140°C

(4)Latex
Grade Solids
(%)
pH Viscosity
(mPa・s)
Ionicity Crystallization Rate Typical applications
Adhesives Dipping Products Paper Processing, etc.
FB-80 55 ≥ 12 10-100 Anion Fast    
ALX-600 60 ≥ 12 50-600 Anion Very fast    
LC-21 50 6~9 100-1000 Nonion Medium    
LM-61 60 ≥ 12 60-200 Anion Medium
LV-60A 60 ≥ 12 50-300 Anion Very slow

Elastomers Dept. Product List

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Elastomers & Performance Plastics

Elastomers Dept.
TEL
+81-3-5290-5550
FAX
+81-3-5290-5400
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