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    • 97. 发明授权
    • Primer compositions
    • 底漆组合物
    • US4287114A
    • 1981-09-01
    • US91761
    • 1979-11-06
    • Kunio ItohTakeshi FukudaMasaaki Matumura
    • Kunio ItohTakeshi FukudaMasaaki Matumura
    • C08L83/00C08K3/36C08K5/14C08L83/04C09D183/04C09J183/00C08L83/06
    • C09D183/04
    • The adhesive bonding of a silicone rubber to a metal surface can be very much improved by the use of the inventive primer composition, in particular, with respect to the heat resistance and anti-oil resistance of the adhesion. The inventive primer composition comprises (a) a substantially linear diorganopolysiloxane of gum-like consistency free from aliphatic unsaturation, (b) an organopolysiloxane with the organic group/silicon atom molar ratio of 1.9 to 2.3 and having a limited amount of vinyl groups directly bonded to the silicon atoms and a viscosity of 5 to 10,000 centistokes at 25.degree. C., (c) an organopolysiloxane resin with the molar ratio of organic groups/silicon atoms of 0.5 to 1.7, (d) an organosilane compound such as vinyl trimethoxysilane or vinyl tris(2-methoxyethoxy) silane, (e) a finely divided silica filler, (f) an organic peroxide and (g) a curing agent for silicone resins, all in limited weight proportions.
    • 通过使用本发明的底漆组合物,特别是关于粘合性的耐热性和抗油性,可以使硅橡胶与金属表面的粘合粘合力得到非常大的改善。 本发明的底漆组合物包含(a)不含脂肪族不饱和度的胶状稠度的基本上线性的二有机聚硅氧烷,(b)有机基/硅原子摩尔比为1.9至2.3的有机聚硅氧烷,并且具有有限量的直接键合的乙烯基 在25℃下粘度为5〜10000厘沲,(c)有机基团/硅原子摩尔比为0.5〜1.7的有机聚硅氧烷树脂,(d)有机硅烷化合物如乙烯基三甲氧基硅烷或 乙烯基三(2-甲氧基乙氧基)硅烷,(e)细碎二氧化硅填料,(f)有机过氧化物和(g)有机硅树脂的固化剂,均为有限重量比。