发明名称 |
Method of making block copolymers by solid state polymerization |
摘要 |
A method of preparing block copolymers by solid state polymerization is described. A mixture of a partially crystalline polycarbonate having activated terminal aryloxy groups, for example terminal methyl salicyl groups, when heated together with an oligomeric polyester having reactive terminal hydroxy groups under solid state polymerization conditions affords block copolymers. The activated terminal aryloxy groups play a key role in preserving the block lengths of the starting materials. A control sample in which the partially crystalline polycarbonate lacks activated terminal aryloxy groups, for example polycarbonates substituted by phenol, affords a much lower molecular weight, more highly randomized copolymer product. The product block copolymers are useful as "weatherable" plastic materials.
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申请公布号 |
US2004138383(A1) |
申请公布日期 |
2004.07.15 |
申请号 |
US20030743241 |
申请日期 |
2003.12.22 |
申请人 |
O'NEIL GREGORY ALLEN;DAY JAMES;BRUNELLE DANIEL JOSEPH;SURIANO JOSEPH ANTHONY;MCCLOSKEY PATRICK JOSEPH;SMIGELSKI PAUL MICHAEL |
发明人 |
O'NEIL GREGORY ALLEN;DAY JAMES;BRUNELLE DANIEL JOSEPH;SURIANO JOSEPH ANTHONY;MCCLOSKEY PATRICK JOSEPH;SMIGELSKI PAUL MICHAEL |
分类号 |
C08G81/00;C08G63/64;C08G63/80;(IPC1-7):C08F8/30 |
主分类号 |
C08G81/00 |
代理机构 |
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