发明名称 |
POLYMER, PROCESS AND COMPOSITION |
摘要 |
<p>There is described a process for producing a gel free hyperbranched polyamide polymer having primary amino groups (useful as a crosslinker). The process comprises the step of reacting at least one diamine and at least one unsaturated diester in a molar ratio of diamine to diester greater than 1 but less than 3 (preferably 2.1 to 2.9); to form the polyamide in a two stage reaction Michael addition and then amidation. The diamine in kept in excess with at least 5% of water by total weight of the diamine and diester, a reaction temperature less than the boiling point of the diamine; and is held under reduced pressure (30 mbar to 1 atms). Gelation does not occur even after substantially all ethylenic (-C=C-) double bonds; and >95% ester [-C(O)=O] groups have reacted. This violates the Flory rules which predict a gel would form based on the number of functional groups present and their degree of conversion.</p> |
申请公布号 |
EP2516513(A1) |
申请公布日期 |
2012.10.31 |
申请号 |
EP20100798802 |
申请日期 |
2010.12.21 |
申请人 |
DSM IP ASSETS B.V. |
发明人 |
FRIEDERICHS, JOSEPH PETRONELLA;VERMEULEN, JACOBUS ADRIAAN ANTONIUS;DRIESSEN, MARCO MARCUS MATHEUS |
分类号 |
C08G81/00;C08G83/00;C08K5/00 |
主分类号 |
C08G81/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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