Chloroprene Rubber (CR) - High-Quality Synthetic Rubber from China Suppliers & Factory
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, as well as rocket fuel.
Appearing as milky white, beige or light brown flakes or blocks, Neoprene is an elastomer and an important variety of synthetic rubber. 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 and ultra-high pressure
- Medium pressure and low pressure hoses
- Oil and fuel hoses
- Brake hoses
- Hoses for use in the petroleum industry
Cables & Wires
- Rubber-sheathed flexible cables
- Trailing cables
- Welding cables
- Flat flexible power and control cables
- Flat flexible lighting cables
- Cable sheathing
Belts & Molded Parts
- Power transmission belts for automotive & general industry
- Conveyer belts with steel cord and textile reinforcement
- Bellows and dust caps / Elbows
- Rubber Seals / Spring elements
- Dampers and bearings
- Windshield wiper blades
Adhesives & Sealing
- Raw material for adhesive production (bonding metal, wood, rubber, leather, fiber, cement, etc.)
- Sealing strips
- Graft-copolymerized with reactive monomers (MMA, acrylic acid) to improve bonding to PVC, PU, and EVA
Frequently Asked Questions (FAQ)
What is Chloroprene Rubber (Neoprene) and its main uses?
Chloroprene Rubber (Neoprene) is an elastomer and synthetic rubber produced by α-polymerization of chloroprene. It is highly valued for its physical and mechanical properties and is widely used in anti-weathering products, viscose soles, coatings, and rocket fuel.
What are the primary performance advantages of Neoprene?
Neoprene offers high tensile strength, elongation, and reversible crystallinity. It exhibits excellent resistance to heat, aging, weather, ozone, oil, chemicals, and inorganic acids/alkalis, alongside certain flame retardancy properties.
What are the disadvantages of Chloroprene Rubber?
The main disadvantages of Chloroprene Rubber are its poor cold resistance and relatively low storage stability compared to other synthetic rubbers.
Which global brands can this product substitute?
This Chloroprene Rubber can successfully substitute Japan Denka A series, Dupont Neoprene series, Lanxess Baypren, and Tosoh Skyprene series.
What is the solubility profile of Chloroprene Rubber?
It 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 completely insoluble in n-hexane and solvent gasoline.
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 modification significantly improves its bonding performance to synthetic materials like PVC, PU, and EVA.