| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject adhesive capable of manifesting excellent initial adhesive strength and water resistance and suitable for bonding a building material to a rough surface of a concrete, a calcium silicate board, a gypsum board, wood, etc., by blending a rubber component with a specific amount of a specified silane compound. SOLUTION: This rubber-based pressure-sensitive adhesive is obtained by blending (A) 100 pts.wt. of a rubber component comprising at least one of a polyisobutylene, a butyl rubber and a halogenated butyl rubber with (B) 0.5-30 pts.wt. of (B1 ) a mercaptosilane compound such asγ- mercaptopropylmethyldimethoxysilane or (B2 ) an alkylalkoxysilane compound having a >=4C alkyl group such as n-butyltrimethoxysilane. Furthermore, the adhesive may be prepared by blending (C) 0.1-15 pts.wt. of an epoxysilane compound or a vinylsilane compound and (D) 0.1-15 pts.wt. of the component B2 respectively based on 100 pts.wt. of the component A.
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