Curable compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 57/06 (2006.01) C08F 8/42 (2006.01) C08L 83/10 (2006.01) C09D 4/00 (2006.01) C09D 143/04 (2006.01)

Patent

CA 2346357

Attempts have been made to reduce the tackiness of the surface of a cured article containing a vinyl polymer having crosslinkable silyl as the curing component, to facilitate the application of an alkyd coating to the cured article, and to obtain a flexible cured article by using a curable composition having a low viscosity. Curable compositions which contain: (A) a vinyl polymer having at least one, on average, crosslinkable functional group (crosslinkable silyl, etc.); (B) a photo-curable substance; (C) an air- oxidation curable substance; (D) a polymer plasticizer; (E) a reactive plasticizer which is a vinyl polymer having one or less, on average, crosslinkable silyl group; or (F) a compound having one silanol group per molecule and/or a compound capable of forming a compound having one silanol group per molecule when reacted with moisture.

Des tentatives ont été faites pour réduire le pouvoir adhésif de la surface d'un article polymérisé contenant un polymère vinylique, dans lequel l'agent durcisseur est un silyle réticulable, pour faciliter l'application sur ledit article d'un revêtement alkyde et pour obtenir un article polymérisé souple au moyen d'une composition durcissable de faible viscosité. L'invention concerne des compositions durcissables comprenant: A) un polymère vinylique renfermant au moins, en moyenne, un groupe fonctionnel réticulable (silyle réticulable, etc.); B) une substance photodurcissable; C) une substance polymérisable par oxydation à l'air; D) un plastifiant de polymère; E) un plastifiant réactif représenté par un polymère vinylique renfermant au maximum, en moyenne, un groupe silyle réticulable; ou F) un composé renfermant un groupe silanol par molécule et/ou un composé capable de former un composé renfermant un groupe silanol par molécule quand il est mis à réagir avec l'humidité.

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