THERMOSETTING POWDER BASED ON AN UNSATURATED POLYESTER RESIN,申请号CA19800350953-传众专利搜索

THERMOSETTING POWDER BASED ON AN UNSATURATED POLYESTER RESIN

申请公布号：CA1139483(A)

申请号：CA19800350953

申请日期：1980.04.30

申请公布日期：1983.01.11

申请人：

STAMICARBON B.V.

发明人：VAN GASSE, RENE L.E.;VERWER, ANDREAS N.J.

分类号：C08L67/00;C08F299/00;C08F299/04;C08L33/00;C08L33/02;C08L67/06;(IPC1-7):08G63/52;08G63/76;08L67/06;C08G63/76

主分类号：C08L67/00

摘要：<p>A thermosetting powder based on a homogeneous mixture containing 50 to 92 % by weight of an unsaturated polyester resin having a softening temperature of at least 50.degree.C 50 to 30 % bij weight of a prepolymer of a diallylester of an aromatic dicarboxylic acid, 3 to 20 % by weight of a high boiling, crosslinking monomer and 0,1 to 5 % by weight of hardening catalyst, all weight percentages relating to the overaal quantity of the polymerizable components. A process for the preparation of the thermosetting powder by melting and mixing the polyester resin and at least the greater part of the other polymerizable components except the catalyst subsequently the catalyst and the remaining portiez of the polymerizable components is rapidly admixed to the melt at a temperature hat is at least 20.degree. lower than the temperature corresponding to a half life time of 1 minute in which operation the time during which the catalyst is exposed to the higher temperature is max. 30 sec. after which the mixture is rapidly cooled and ground.</p>