氯（lǜ）丁橡膠，是由氯丁二烯（即2-氯-1,3-丁二烯）為主（zhǔ）要原料進行α-聚合而（ér）生產的合成橡膠，被廣泛應用於抗風化產品、粘（zhān）膠鞋（xié）底、塗料和火箭燃料（liào）。

外觀為乳白色、米黃色或淺棕色的片狀或塊狀物，是氯（lǜ）丁二烯（即2-氯-1,3-丁二烯）為（wéi）主要原料進行α-聚合生成的彈性體。氯（lǜ）丁（dīng）橡膠溶解度參數占δ=9.2～9.41。溶於甲苯、二甲苯、二氯乙烷、三釩（fán）乙（yǐ）烯，微溶於丙酮、甲乙酮（tóng）、醋酸乙酯、環己烷，不溶於正己（jǐ）烷、溶劑（jì）汽油，但可溶（róng）於由適當比例的良溶劑（jì）和不良（liáng）溶劑（jì）及非溶劑或（huò）不良溶（róng）劑和非溶劑組成的混合溶劑，在植物油和礦物油中溶脹而不溶解。

有良好的物（wù）理機械性能，耐油，耐熱，耐燃，耐日光，耐臭氧，耐酸堿，耐化（huà）學試劑。缺點是耐寒性和貯存穩定性較差。具有較高的拉伸強度、伸（shēn）長率和可（kě）逆的結晶性，粘（zhān）接性（xìng）好。耐老化（huà）、耐熱。耐油（yóu）、耐化學腐蝕性優異。耐候（hòu）性（xìng）和耐臭（chòu）氧老化僅次於乙丙橡（xiàng）膠和丁基橡（xiàng）膠。耐熱性與丁腈（jīng）橡膠（jiāo）相（xiàng）當，分解溫度230～260℃，短期可耐120～150℃，在80～100℃可長期使用，具有一定的阻燃（rán）性。耐油（yóu）性僅次於丁腈橡膠。耐無機酸、堿腐蝕（shí）性良好。耐寒性稍差，電絕緣性（xìng）不佳。生膠（jiāo）儲存穩定性差，會產生“自硫”現象（xiàng），門尼黏度增大，生膠變硬。

Neoprene is a synthetic rubber produced by α-polymerization of chloroprene (i.e. 2-chloro-1,3-butadiene) as the main raw material, and is widely used in weather-resistant products, viscose soles, coatings and rocket fuel.

It is milky white, beige or light brown in appearance as flakes or lumps, and is an elastomer produced by the α-polymerization of chloroprene (i.e. 2-chloro-1,3-butadiene) as the main raw material.The solubility parameters of neoprene accounted for δ=9.2~9.41.It is soluble in toluene, xylene, dichloroethane, trivanadium ethylene, slightly soluble in acetone, methyl ethyl ketone, ethyl acetate, cyclohexane, insoluble in n-hexane, solvent gasoline, but soluble in an appropriate proportion of benign solvent and bad solvent and non-solvent or a mixed solvent composed of a bad solvent and non-solvent, swelling in vegetable oil and mineral oil without dissolution.

It has good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, chemical reagent resistance.Its disadvantages are poor cold resistance and storage stability.It has high tensile strength, elongation and reversible crystallinity with good adhesion. It has excellent aging resistance, heat resistance, oil resistance and chemical resistance. Its weather resistance and ozone aging resistance are second only to ethylene propylene rubber and butyl rubber.Its heat resistance is comparable to nitrile rubber, the decomposition temperature is 230~260 °C, the short-term resistance is 120~150 °C, and it can be used for a long time at 80~100 °C, and has certain flame retardancy.Its oil resistance is second only to nitrile rubber. Its resistance to inorganic acids and alkalis is good, but its cold resistance is slightly poor, and its electrical insulation is not good. Its raw rubber storage stability is poor, which will produce the phenomenon of "self-sulfur", Mooney viscosity increases, and the raw rubber becomes hard.

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