| 摘要 |
Aqueous latex compositions for use as contact adhesives comprising a mixture of an amorphous copolymer A and an amorphous copolymer B and preferably a tackifying resin where A comprises units of vinylidene chloride, an internally plasticizing comonomer like 2-ethylhexyl acrylate or n-butyl acrylate, and optionally a copolymerizable acid, and has Tg in the range -50 DEG to <0 DEG C. and B comprises units of vinylidene chloride, an alkyl acrylate and/or methacrylate or certain other comonomers, and optionally a copolymerizable acid, and has a Tg in the range 0 DEG to 80 DEG C., and wherein copolymer A has a modal molecular weight Mp within the range 100,000 to 700,000.
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