Peroxide curable fluoroelastomer compositions containing a tetraalkylammonium halide and coagent
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0340786A1
公开(公告)日:1989-11-08
A peroxide curable elastomer composition comprising a fluoroelastomer whose interpolymerized units consist essentially of up to 3 mole % of a bromine containing olefin with the proviso that enough of such units are present to provide at least 0.05 weight percent bromine, at least 30 weight percent vinylidene fluoride units, and at least one fluorine-containing monomer that is copolymerizable with the bromine-containing olefin and vinylidene fluoride, contains 2-7 carbon atoms, no bromine atoms, and at least as many fluorine atoms as carbon atoms;
about 0.02-0.8 weight percent, based on the weight of the fluoroelastomer, of a tetraalkylammonium halide where each alkyl group contains 1-10 carbon atoms and the halide is a chloride, bromide or iodide;
about 0.5-10 weight percent, based on the weight of the fluoroelastomer, of an organic peroxide curing agent; and
about 1-15 weight percent, based on the weight of the fluoroelastomer, of a coagent that is a polyunsaturated compound which is capable of cooperating with the organic peroxide curing agent to cure the fluoroelastomer. These fluoroelastomer compositions form a strong adhesive bond with metal and resist separation from the metal.
一种可过氧化物固化的弹性体组合物,它包括一种氟弹性体,其互聚单元基本上由不超过 3 摩尔%的含溴烯烃组成,但这种单元的存在必须足以提供至少 0.05重量%的溴,至少30重量%的偏氟乙烯单元,以及至少一种可与含溴烯烃和偏氟乙烯共聚的含氟单体,该单体含有2-7个碳原子,不含溴原子,氟原子的数量至少与碳原子的数量相同;
约 0.02-0.8 重量百分比的四烷基卤化铵(以氟橡胶重量为基准),其中每个烷基含有 1-10 个碳原子,卤化物为氯化物、溴化物或碘化物;
以氟橡胶重量为基准,约 0.5-10 重量百分比的有机过氧化物固化剂;以及
以氟橡胶重量为基准,约 1-15 重量百分比的助剂,该助剂为多不饱和化合物,可与有机过氧化物固化剂配合固化氟橡胶。这些氟橡胶组合物能与金属形成牢固的粘合剂,并能防止与金属分离。