Process for stabilizing copolymers of ethylenically unsaturated fluoro compounds with vinyl ethers
申请人:E.I. du Pont de Nemours and Company
(a Delaware corporation)
公开号:EP0481478A1
公开(公告)日:1992-04-22
A copolymer of an unsaturated fluoro compound with a vinyl ether and, optionally, with at least one additional ethylenically unsaturated monomer can be stabilized against gelling by the addition, either to the copolymerization reaction or to the copolymer in solution or in aqueous dispersion, of a 2,2-unsubstituted alicyclic 1,3-diketone in the presence of the enolate ion of said ketone, which enolate may be formed in situ. Solutions and dispersions of such copolymers are very useful in hard, weather-resistant finishes, for example, those used for bridge ironwork and architectural maintenance and in automotive applications.
在共聚反应中或在溶液或水分散液中加入 2,2-未取代脂环族 1,3-二酮,在所述酮的烯酸根离子(烯酸根可在原位形成)存在的情况下,可稳定不饱和氟化合物与乙烯基醚以及至少另外一种乙烯基不饱和单体的共聚物,防止胶凝。这种共聚物的溶液和分散体在坚硬的耐候饰面中非常有用,例如用于桥梁铁制品和建筑维护以及汽车应用中的饰面。