Clearcoating composition with unblocked acid catalyst

Details Clearcoating composition with unblocked acid catalyst Clearcoating composition with unblocked acid catalyst

C - Chemistry, Metallurgy

09

D

C09D 7/14 (2006.01) C09D 161/28 (2006.01) C09D 175/12 (2006.01)

Patent

CA 2670687

A two-component solvent-borne clearcoat composition comprising an unblocked acid catalyst, a film-forming binder, and an aminoplast crosslinking agent (e.g., a melamine formaldehyde crosslinking agent) surprisingly provides enhanced appearance when compared to a one-component clearcoating composition containing blocked acid catalyst cured at temperatures above 121°C (250°F).

Composition de vernis incolore à base de solvant à deux composants comprenant un catalyseur acide non bloqué, un liant filmogène et un agent de réticulation aminoplastique (par exemple un agent de réticulation de type mélamine-formaldéhyde). Cette composition permet, de façon assez surprenante, d'obtenir un meilleur aspect qu'une composition de vernis incolore à un seul composant contenant un catalyseur acide bloqué, durcie à des températures supérieures à 121 °C.

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