Hydroxyl-terminated polybutadienes and their use i

专利名称：Hydroxyl-terminated polybutadienes and

their use in curing formulations

发明人：Herbert Chao,Nan Tian,Alain Drexler,John

Schmidhauser

申请号：US10732732申请日：20031210公开号：US06864321B2公开日：20050308

摘要：Compositions comprising (A) non-branched polybutadiene having terminalhydroxyl functionality less than 2 per molecule by average; and (B) branchedpolybutadiene having terminal hydroxyl functionality more than 2 per molecule byaverage; the weight ratio of (A) to (B) being about 99:1 to 1:99. These compositions arereacted with organic polyisocyanates to form prepolymers which are cured by reactionwith a chain extender such as a diol to produce cured resins which exhibit unexpectedlyimproved tear strength properties and themoplasticity with high modulus, and improvedtackiness and shelf life for hot melt adhesives. The prepolymers have lower viscosity andbetter storage stability as compared with those from conventional branched

polybutadienes of the (B) type. Alternatively, the compositions can be cured directly in aone-shot reaction with diisocyanates to form a polyurethane with the described

combination of properties. In addition, the compositions of (A) and (B) can be reacted toform polybutadienes with carboxyl, amine or epoxy-terminal functionality with are usefulcomponents of formulations.

申请人：Herbert Chao,Nan Tian,Alain Drexler,John Schmidhauser

地址：Paoli PA US,Wilmington DE US,Philadelphia PA US,Paoli PA US

国籍：US,US,US,US

代理机构：Cozen O'Connor, P.C.

代理人：Michael B. Fein, Esq.

更多信息请下载全文后查看