A peroxide-curable fluoroelastomer composition which comprises a fluoroelastomer whose interpolymerized units consist essentially of units derived from vinylidene fluoride, units derived from at least one other fluorine-containing monomer copolymerizable therewith, said monomer being a compound which contains 2-7 carbon atoms, contains no bromine atoms or iodine atoms, and contains at least as many fluorine atoms as carbon atoms, and said fluoroelastomer contains up to 3 mole percent of units derived from a bromine-containing olefin or 0.1-2 mole percent of units derived from an iodine-containing olefin, and from about 0.05-2 parts per 100 parts fluoroelastomer of an N,N,N',N'- tetra-substituted 1,8-diaminonaphthalene having the formula:
wherein Ri, R2, R3 and R4 are independently alkyl groups of 1-6 carbon atoms, phenyl or benzyl, R1 and R2 and/or R3 and R4 can be joined to form a 5- or 6-membered heterocyclic ring in which a carbon atom can be replaced by an oxygen or a sulfur atom, R, and R3 and/or R2 and R4 can be joined to form a heterocyclic ring of 6-20 carbon atoms in which a carbon atom can be replaced by an oxygen or a sulfur atom, X and Y are independently an alkyl group or an alkoxy group containing 1-4 carbon atoms and n is 0-3.
一种过
氧化物固化型
氟弹性体组合物,它包含一种
氟弹性体,其互聚单元主要由衍生自
偏氟乙烯的单元、衍生自至少一种可与之共聚的其他含
氟单体的单元组成,所述单体是一种含有 2-7 个
碳原子的化合物,不含
溴原子或
碘原子,且含有至少与
碳原子数量相同的
氟原子,所述
氟弹性体含有高达 3 摩尔%的衍生自含
溴烯烃的单元或 0.每 100 份
氟弹性体中含有约 0.05-2 份 N,N,N',N'-四取代的
1,8-二氨基萘,其式如下:
其中 Ri、R2、R3 和 R4 独立地为 1-6 个
碳原子的烷基、
苯基或
苄基,R1 和 R2 和/或 R3 和 R4 可连接形成 5 或 6 元杂环,其中一个
碳原子可被
氧原子或
硫原子取代,R、和 R3 和/或 R2 和 R4 可连接形成 6-20 个
碳原子的杂环,其中一个
碳原子可被
氧原子或
硫原子取代,X 和 Y 独立地为含 1-4 个
碳原子的烷基或烷
氧基,n 为 0-3。