申请人:The Malaysian Rubber Producers Research Association
公开号:US04118367A1
公开(公告)日:1978-10-03
The invention relates to the production of silica reinforced rubber incorporating a novel azo-silane coupling agent which does not depend on the vulcanization reaction to effect coupling to the rubber. The novel coupling agents are of the general formula: Y -- X -- CO -- N .dbd. N -- CO -- X.sup.1 -- Z where X and X.sup.1 are the same or different and each is an imino group, an oxygen atom, or a substituted or unsubstituted methylene group; Y is a substituted or unsubstituted alkyl, aryl or aralkyl group or is the same as Z; and Z as an alkyl, aryl or aralkyl group which has an substituent at least one silane group of the formula: --Si(OR).sub.3 or --OSi(OR).sub.3 in which R is a straight or branched chain alkyl group. The azo-silane is typically used in amounts of from .1 to 10 pphr. Silica reinforced rubber vulcanizates produced using the azo-silane can have improved properties e.g. abrasion resistance, scorch resistance and resilience as compared with vulcanizates made using conventional coupling agents.
本发明涉及生产硅增强橡胶的方法,其中包括一种新型偶氮硅烷偶联剂,该偶联剂不依赖于硫化反应来使橡胶与硅烷偶联。新型偶联剂的一般式为:Y - X - CO - N = N - CO - X1 - Z,其中X和X1相同或不同,每个都是亚胺基,氧原子或取代或未取代的亚甲基基团; Y是取代或未取代的烷基,芳基或芳基烷基团,或与Z相同; Z是具有至少一个硅烷基团的烷基,芳基或芳基烷基团,该硅烷基团的化学式为:-Si(OR)3或-OSi(OR)3,其中R是直链或支链烷基团。通常使用偶氮硅烷的量为0.1至10 pphr。使用偶氮硅烷生产的硅增强橡胶硫化胶可以与使用传统偶联剂制成的硫化胶相比具有改善的性能,例如耐磨性,耐热性和回弹性。