Polymer and curable compositions improved in storage stability

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 33/12 (2006.01) C08F 220/14 (2006.01) C08L 33/08 (2006.01) C09J 157/06 (2006.01) C09K 3/10 (2006.01)

Patent

CA 2513410

Current compositions which comprise vinyl polymers having crosslinking silyl groups often suffer from retarded curing after the storage. A curable composition comprising as the essential component a vinyl polymer (I) which has at least one crosslinking silyl group at the end and comprises essential constituent units derived from a monomer having a methyl ester group; sealing compounds, liquid gaskets, and adhesives, made by using the curable composition; a polymer which has at least one crosslinking functional group at the end and a backbone chain made of a vinyl polymer, characterized in that methyl acrylate accounts for 2 to 80 wt% of the monomers constituting the backbone chain; and curable compositions improved in storage stability, which comprise as the essential components the following two components: (a) a vinyl polymer having at least one crosslinking silyl group and (b) a compound having a methyl ester group except the polymer (a).

L'invention concerne des composition courantes comprenant des polymères vinyliques à groupes de réticulation, qui souffrent d'un retard de durcissement après le stockage. Une composition durcissable comprend comme composant essentiel un polymère vinylique (I) possédant au moins un groupe silyle de réticulation au niveau de l'extrémité et des unités de constituants essentiels dérivés d'un monomère possédant un groupe ester de métyle. L'invention concerne également des composés d'étanchéité, des joints statiques liquides et des adhésifs produits par utilisation de ladite composition durcissable. L'invention concerne enfin un polymère possédant au moins un groupe fonctionnel de réticulation au niveau d'une extrémité et une chaîne de squelette en polymère vinylique, caractérisé en ce que l'acrylate de méthyle représente 2-80% en poids des monomères constituant ladite chaîne de squelette. L'invention concerne enfin des compositions durcissables à stabilité de stockage améliorée comprenant comme composants essentiels les deux composants suivants: a) un polymère vinylique possédant au moins un groupe silyle de réticulation et b) un composé possédant un groupe ester de méthyle à l'exception du polymère a).

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