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发明授权
US5554690A Low viscosity adhesive compositions containing asymmetric radial polymers 失效
含有不对称径向聚合物的低粘度粘合剂组合物

Low viscosity adhesive compositions containing asymmetric radial polymers
摘要：
A low viscosity adhesive composition which comprises:(a) an asymmetric radial block copolymer of a vinyl aromatic hydrocarbon and at least one conjugated diene having from 3 to 6 polymer arms, which:(i) contains from 33 to 85% by weight of polyvinyl aromatic hydrocarbon block/polydiene block copolymer arms and the balance polydiene homopolymer arms,(ii) has vinyl aromatic hydrocarbon blocks with block molecular weights of from 8000 to 30,000,(iii) has conjugated diene blocks in the copolymer arms with a molecular weight of at least 6000, and(iv) has a polyvinyl aromatic hydrocarbon content of from 10 to 40% by weight; and(b) from 20 to 400 parts per hundred parts of polymer of a tackifying resin.The invention also encompasses the polymers used in the adhesive.
摘要（中）：

一种低粘度粘合剂组合物，其包含：（a）乙烯基芳族烃和至少一种具有3至6个聚合物臂的共轭二烯的不对称的径向嵌段共聚物，其：（i）含有33至85重量％的聚乙烯 芳族烃嵌段/聚二烯嵌段共聚物臂和余量聚二烯均聚物臂，（ii）具有阻挡分子量为8000至30,000的乙烯基芳族烃嵌段，（iii）共聚物臂中共轭二烯嵌段在分子量为 至少6000，和（iv）具有10至40重量％的聚乙烯基芳族烃含量; 和（b）每100份增粘树脂聚合物为20-400份。 本发明还包括在粘合剂中使用的聚合物。

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