申请人:The Dow Chemical Company
公开号:US05143968A1
公开(公告)日:1992-09-01
Polystyrene-polyisoprene-polystyrene block copolymers, hot-melt adhesive compositions constituted of polystyrene-polyisoprene-polystyrene block copolymers, and articles of manufacture produced therefrom. These copolymers possess blocks of high average molecular weight polystyrene (12,000 to 20,000) and low overall average molecular weight (60,000 to 110,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.
聚苯乙烯-聚异戊二烯-聚苯乙烯嵌段共聚物,由聚苯乙烯-聚异戊二烯-聚苯乙烯嵌段共聚物构成的热熔粘合剂组合物以及由此制成的制品。这些共聚物具有高平均分子量聚苯乙烯块(12,000至20,000)和低总平均分子量(60,000至110,000),因此当与兼容的粘合剂树脂以及最好还有次要粘合剂树脂或增塑油和稳定剂按所需比例混合时,可以形成优越的热熔粘合剂组合物。这些热熔粘合剂组合物具有卓越的耐热性、低粘度的静态失效时间、良好的剥离粘附性、良好的粘着性以及在低于可能损坏基材的温度下与聚乙烯或聚丙烯基材结合的高能力。