| 摘要 |
<p>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 plasticising comonomer like 2-ethylhexyl acrylate or n-butyl acrylate, and optionally a copolymerisable acid, and has Tg in the range -50 to <0°C, and B comprises units of vinylidene chloride, an alkyl acrylate and/or methacrylate or certain other comonomers, and optionally a copolymerisable acid, and has a Tg in the range 0 to 80°C, and wherein copolymer A has a modal molecular weight Mp within the range 100,000 to 700,000.</p> |
