发明名称 |
PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT POLYESTER RESINS |
摘要 |
Preparation of high molecular weight polyester resins starting from resins with intrinsic viscosity I.V. lower than 0.57 dl/ comprising the following steps: (1) mixing the resin in the melt with a polyaddition additive containing at least two groups cap- able of addition reactions with the terminal OH and COOH groups of the resin ; (2) converting the melted polyester into solid particles and then subjecting the particles to crystallization; (3) heating the particles at temperature between 150 and 210 .degree.C up~ obtain the desired increase of intrinsic viscosity.
|
申请公布号 |
CA2096640(C) |
申请公布日期 |
2003.03.18 |
申请号 |
CA19922096640 |
申请日期 |
1992.10.15 |
申请人 |
|
发明人 |
AL GHATTA, HUSSAIN ALI KASHIF |
分类号 |
B29C49/02;B29C47/00;C08G63/00;C08G63/20;C08G63/80;C08G63/91;C08J11/04;(IPC1-7):C08G63/20;B29B7/46 |
主分类号 |
B29C49/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|