Unsaturated esters and their use in coating compositions

Details Unsaturated esters and their use in coating compositions Unsaturated esters and their use in coating compositions

C - Chemistry, Metallurgy

07

C

C07C 69/593 (2006.01) C07C 67/08 (2006.01) C07C 67/26 (2006.01) C07C 69/60 (2006.01) C08F 220/20 (2006.01) C08F 222/10 (2006.01) C08G 18/62 (2006.01) C09D 135/02 (2006.01)

Patent

CA 2231503

Hydroxy functional, unsaturated diesters are disclosed that comprise the esterification reaction products of unsaturated anhydrides with secondary alcohols to form monoesters, followed by oxyalkylation of the monoester with epoxy compounds, whereby a diester is formed with hydroxy functionality. Use of secondary alcohol yields monoesters less prone to disproportionation. The unsaturated diesters may be copolymerized with vinyl monomers to form hydroxy functional copolymers useful in coating applications, wherein they may be included in compositions along with a curing agent that is reactive with hydroxy groups.

L'invention concerne des diesters insaturés à fonctionnalité hydroxy comprenant les produits de réactions d'estérification d'anhydrides insaturés avec des alcools secondaires pour former des monoesters, suivies par une oxyalkylation du monoester avec des composés époxy, de manière à former un diester à fonctionnalité hydroxy. L'utilisation d'alcool secondaire permet d'obtenir des monoesters moins sujets à disproportion. Les diesters insaturés peuvent être copolymérisés avec des monomères vinyliques afin de former des copolymères à fonctionnalité hydroxy utiles dans des applications de revêtement, dans lesquelles ils peuvent être inclus dans des compositions comprenant un agent de durcissement réagissant avec des groupes hydroxy.

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