发明名称 |
Process for the preparation of unsaturated polyesters adapted for the production of unsaturated polyester resins |
摘要 |
A process for the preparation of an unsaturated polyester from a glycol and tetrahydrophthalic anhydride, maleic anhydride and/or fumaric acid, suitable for the production of an unsaturated polyester resin rapidly loosing its surface tackiness after cross-linking, and furnishing very flexible materials which are resistant to creasing, is described. The glycol employed has at least two ether bridges regularly alternated with -CH2-CH2- groups. The reaction is carried out in such a way as to obtain an alkyd essentially exempt from free tetrahydrophthalic anhydride. The resins thus prepared are adapted to the production of putties free from surface tackiness and having good finishing properties for application by spraying and/or by putty knife.
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申请公布号 |
US4312978(A) |
申请公布日期 |
1982.01.26 |
申请号 |
US19800143419 |
申请日期 |
1980.04.24 |
申请人 |
SNIA VISCOSA S.P.A. |
发明人 |
LIGUTTI, MARZIO;BERTOTTI, ELVIO |
分类号 |
C08G63/676;(IPC1-7):C08G63/66 |
主分类号 |
C08G63/676 |
代理机构 |
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地址 |
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