申请人:Mitsubishi Chemical Corporation
公开号:EP3943565A1
公开(公告)日:2022-01-26
The following is provided as an adhesive composition which adheres strongly and maintains high static shear stably even when exposed to high temperature and high humidity with respect to poor adhesion adherends such as ethylene propylene diene rubber (EPDM), butyl rubber (IIR), chloroprene rubber (CR), styrene butadiene rubber (SBR), thermoplastic polyolefin rubber, and modified asphalt.
An adhesive composition containing an acrylic resin (A) containing a terminal carboxyl-containing monomer (a1) unit represented by the following general formula (1), a (meth)acrylic acid monomer (a2) unit and a hydroxyl-containing monomer (a3) unit; an epoxy crosslinking agent (b1), and an isocyanate crosslinking agent (b2). In general formula (1):
R1 represents hydrogen or a methyl group, R2 represents a saturated divalent aliphatic group, an unsaturated divalent aliphatic group, a divalent aromatic group, a saturated divalent alicyclic group, or an unsaturated divalent alicyclic hydrocarbon group, and n is a positive number of not less than 1.
下面提供一种粘合剂组合物,该组合物即使暴露在高温和高湿环境中,对于粘合力较差的粘合剂,如乙丙橡胶(EPDM)、丁基橡胶(IIR)、氯丁橡胶(CR)、丁苯橡胶(SBR)、热塑性聚烯烃橡胶和改性沥青,也能牢固地粘合并稳定地保持较高的静态剪切力。
一种含有丙烯酸树脂(A)的粘合剂组合物,该丙烯酸树脂含有由以下通式(1)表示的含端羧基单体(a1)单元、(甲基)丙烯酸单体(a2)单元和含羟基单体(a3)单元;环氧交联剂(b1)和异氰酸酯交联剂(b2)。在通式(1)中
R1 代表氢或甲基,R2 代表饱和二价脂肪族基团、不饱和二价脂肪族基团、二价芳香族基团、饱和二价脂环族基团或不饱和二价脂环族烃基团,n 是不小于 1 的正数。