申请人:Vulnax International Limited
公开号:EP0004711A2
公开(公告)日:1979-10-17
In the cross-linking of polymers containing ethylenic unsaturation, especially natural and synthetic rubbers of the isoprene or styrene-butadiene series, S-acyl derivatives of N-substituted thiohydroxylamines, previously known to be useful as accelerators for vulcanisation by sulphur or sulphur donors, can be used themselves as sole vulcanisation agents.
The preferred compounds for this purpose are the N-dithiocarbamoyl derivatives of amines, amides or imides, e.g. S-(N',N'-dimethylamino)-N,N-dimethyldithiocarbamate, S-(acetylamino) N,N-diethyldithiocarbamate or S-(phthalimido)-di-n-butyldithiocarbamate. Typical advantages of the resultant rubbers are better resistance to heat ageing and resistance to compression set when compared with sulphur cured rubbers and greater processing safety than TMTD-cured rubbers.
在含有乙烯不饱和度的聚合物,特别是异戊二烯或丁二烯系列天然橡胶和合成橡胶的交联过程中,N-取代的硫代羟胺的 S-酰基衍生物(以前已知可用作硫或硫供体的硫化促进剂)本身可用作唯一的硫化剂。
为此,首选的化合物是胺、酰胺或酰亚胺的 N-二硫代氨基甲酰衍生物,例如 S-(N',N'-二甲基氨基)-N,N-二甲基二硫代氨基甲酸酯、S-(乙酰氨基)N,N-二乙基二硫代氨基甲酸酯或 S-(邻苯二甲酰亚胺)-二-N-丁基二硫代氨基甲酸酯。与硫固化橡胶相比,硫固化橡胶具有更好的耐热老化性和抗压缩永久变形性,并且比 TMTD 固化橡胶具有更高的加工安全性。