Process for the manufacture of flexible polyuretha

专利名称：Process for the manufacture of flexible

polyurethane foams with high load- bearingand high energy-absorption capacity

发明人：Wolfgang Jarre,Peter Weyland,Gerhard

Mueller

申请号：US06/028311申请日：19790409公开号：US04237240A公开日：19801202

摘要：The invention concerns a process for the manufacture of flexible polyurethanefoams by reaction of a mixture consisting of diphenylmethane diisocyanates andpolyphenylene polymethylene polyisocyanates having a functionality greater than 2containing 55 to 85 percent by weight diphenylmethane diisocyanate based on the totalweight of the isocyanate mixture with polyester polyols or mixtures of polyester polyolsand polyether polyols having a polyester polyol content of more than 60 percent byweight based on the weight of the polyol mixture, and optionally chain extenders,auxiliaries, and additives, in the presence of catalysts and, in particular, water as a blowingagent. The special selection of starting compounds results in the production of flexiblepolyurethane foams having a high resistance to hydrolysis, high load- bearing capacity,and high energy absorption upon impact.

申请人：BASF AKTIENGESELLSCHAFT

代理人：Norbert M. Lisicki,Joseph D. Michaels

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