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Chloroprene Rubber (CR) from China Suppliers - High-Quality Factory Production for Durable Applications
Product Introduction
Chloroprene Rubber is a synthetic rubber produced by α-polymerization of chloroprene (i.e. 2-chloro-1,3-butadiene) as the main raw material. It is widely used in anti-weathering products, viscose soles, and coatings. and rocket fuel.
Appearance & properties: Appearing as milky white, beige or light brown flakes or blocks, Neoprene is an elastomer & important variety of synthetic rubber.
Key Performance: It has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, and chemical reagent resistance. The disadvantage is poor cold resistance and storage stability.
Neoprene has high tensile strength, elongation, reversible crystallinity and good adhesion. Resistant to aging and heat. Excellent oil and chemical resistance. Weather resistance and ozone aging resistance are second only to ethylene propylene rubber and butyl rubber. The heat resistance is equivalent to that of nitrile rubber, with a decomposition temperature of 230 to 260°C, short-term resistance to 120 to 150°C, and long-term use at 80 to 100°C. It has certain flame retardancy. Oil resistance is second only to nitrile rubber. Good resistance to inorganic acid and alkali corrosion.
The solubility parameter of chloroprene rubber accounts for δ=9.2~9.41. Soluble in toluene, xylene, dichloroethane, trivanadium, slightly soluble in acetone, methyl ethyl ketone, ethyl acetate, cyclohexane, insoluble in n-hexane, solvent gasoline, but soluble in appropriate proportions of good solvents and A mixed solvent composed of a poor solvent and a non-solvent or a poor solvent and a non-solvent, which swells in vegetable oil and mineral oil without dissolving.
Technical Specifications
| Item: | CR240 | CR241 | CR242 | CR243 | CR244 | CR244A | CR244B | CR231 | CR232 | CR233 | CR281 | CR282 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Viscosity mpa.s (25℃, 5% Xylene solution) | 13-24 | 25-34 | 35-53 | 54-75 | 76-115 | 116-140 | ≥ 140 | *** | *** | |||
| Viscosity mpa.s (25℃, 10% Xylene solution) | *** | 500-1500 | 1500-2500 | 2500-5000 | *** | |||||||
| Viscosity mpa.s (25℃, 15% Xylene solution) | *** | *** | 1000-3000 | 3000-6000 | ||||||||
| Application | Adhesive, Adhesive with higher tack; Adjust the viscosity, improve the initial adhesion | Goods with highly loading, adhesive, conveyor belts, hoses, rubber seals, some other hard rubber product. | *** | |||||||||
| Substitute | Japan Denka A series; Dupont Neoprene series; Lanxess Baypren; Tosoh Skyprene | |||||||||||
Product Application
Hoses
- Hoses for high pressure, ultra-high pressure, medium and low pressure
- Oil and fuel hoses
- Brake hoses
- Hoses for use in the petroleum industry
Cables and Wires
- Rubber-sheathed flexible cables & trailing cables
- Welding cables
- Flat flexible power, control, and lighting cables
- Cable sheathing
Conveyor & Transmission Belts
- Power transmission belts for the automotive and general industry
- Conveyor belts with steel cord and textile reinforcement for industries
Molded Parts & Seals
- Bellows and dust caps / Elbows
- Rubber Seals / Sealing strips
- Spring elements / Dampers and bearings
- Windshield wiper blades
Adhesive Formulations
- Raw material for bonding metal, wood, rubber, leather, fiber, and cement
- Graft-copolymerized with MMA and acrylic acid to improve bonding to PVC, PU, and EVA
Frequently Asked Questions (FAQ)
What is Chloroprene Rubber (Neoprene) and how is it produced?
Chloroprene Rubber (Neoprene) is an elastomer and an important synthetic rubber produced by the α-polymerization of chloroprene (2-chloro-1,3-butadiene) as the main raw material. It appears as milky white, beige, or light brown flakes or blocks.
What are the main performance advantages and disadvantages of Neoprene?
It features excellent physical and mechanical properties, including high tensile strength, elongation, and good adhesion. It is highly resistant to oil, heat, flames, sunlight, ozone, acids, alkalis, and chemical reagents. Its primary disadvantages are poor cold resistance and limited storage stability.
What is the heat resistance range of Chloroprene Rubber?
Neoprene has a decomposition temperature of 230 to 260°C. It can withstand short-term exposure to temperatures ranging from 120 to 150°C and is suitable for long-term use at temperatures between 80 to 100°C.
What are the solubility characteristics of Chloroprene Rubber?
Chloroprene Rubber has a solubility parameter of δ=9.2~9.41. It is soluble in toluene, xylene, and dichloroethane; slightly soluble in acetone, methyl ethyl ketone, ethyl acetate, and cyclohexane; and insoluble in n-hexane or solvent gasoline. It swells in vegetable oil and mineral oil without dissolving.
Which international brands can this CR series substitute?
The CR series can serve as a substitute for Japan Denka A series, Dupont Neoprene series, Lanxess Baypren, and Tosoh Skyprene.
How can the bonding performance of neoprene adhesives be improved?
It can be graft-copolymerized with reactive monomers such as methyl methacrylate (MMA) and acrylic acid. This chemical modification enhances the bonding performance of neoprene adhesives to synthetic materials like PVC, PU, and EVA.