What are the differences in the properties of neoprene models?
Good physical and mechanical properties, oil resistance, heat resistance, fire resistance, sunlight resistance, ozone resistance, acid and alkali resistance, chemical reagents. The disadvantage is cold resistance and poor storage stability. With high tensile strength, elongation and reversible crystallinity, good adhesion. Aging resistance, heat resistance. Excellent oil resistance and chemical resistance. Weatherability and ozone resistance are second only to that of ethylene propylene rubber and butyl rubber. The heat resistance and the nitrile rubber, the decomposition temperature of 230~260 DEG C, short-term resistance at 80~100 DEG 120~150 DEG C, can be used for a long time, with a certain flame retardancy. Oil resistance second only to nbr. Good resistance to inorganic acids and alkalis. Cold resistance is slightly worse, electrical insulation is poor. Rubber poor storage stability, will have a "sulfur" phenomenon, Mooney viscosity increased, hard rubber. Foreign brands are: AD 1, 30 (USA), A-90 (Japan), 320 (Germany), and MA40S (France).
The appearance of white, yellow or light brown flakes or lumps, is chloroprene (2- chloro -1,3- butadiene) as the main raw material for the polymerization of alpha elastomer. The solubility parameter of chloroprene rubber accounts for Delta =9.2~9.41. Soluble in toluene, xylene, two ethyl chloride, three vanadium ethylene, slightly soluble in acetone, methyl ethyl ketone, ethyl acetate, insoluble in hexane, cyclohexane, Yu Zheng solvent gasoline, but soluble by appropriate proportion of good and poor solvent and non solvent or poor solvent and non solvent composition of the mixed solvent in plants oil and mineral oil and solvent swelling.
Different types of applications are different:CR122 chloroprene rubber: belt, conveyor belt, wire and cable, oil resistant rubber sheet, oil hose, sealing materials and other rubber products.CR232 chloroprene rubber: cable sheath, oil resistant hose, rubber seals, adhesives and so on.CR2441 2442 chloroprene: a raw material used in adhesives for bonding metals, wood, rubber, leather and other materials.CR321 322 type chloroprene rubber cables, plywood, ordinary and hose, oil resistant rubber boots, air duct, cloth, tent cloth, conveyor belt, conveyor belt, rubber seals, agricultural capsule cushion, lifeboat etc..Used as toughening agent for modified acrylate fast structural adhesive (SGA).
