A paint resin emulsion having weatherability

C - Chemistry – Metallurgy – 09 – D

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C09D 157/04 (2006.01) C09D 143/04 (2006.01)

Patent

CA 2251706

To provide improved acrylic resin which has weatherability such as the gloss- retaining ability almost as good as that of the fluorine resin or silicone resin while maintaining the advantages of the conventional acrylic resin binder as paint resin such as the gloss or pigment dispersion stability. The emulsion is characterized in that it comprises in 100 wt.% of resin emulsion component thereof: (a) 0.1 to 10 wt.% of a monomer containing light stabilizing group; and (b) 0.1 to 10 wt.% of a monomer containing alkoxysilyl group. Preferably, it further comprises (c) 0.1 to 10 wt.% of monomer containing ultra-violet absorbent group.

La présente invention concerne une résine acrylique présentant des qualités de résistance aux intempéries, et notamment de maintien de l'éclat se comparant à ce qu'on obtient avec les fluororésines ou les résines siliconiques, tout en conservant les qualités que l'on constate en matière d'éclat et de stabilité de la dispersion pigmentaire en utilisant comme résine de peinture un liant conventionnel à la résine acrylique. L'émulsion est caractérisée en ce qu'elle contient, en masse rapportée au composant émulsion résinique, (a) de 0,1 à 10 % d'un monomère contenant un groupe photostabilisant, et (b) de 0,1 à 10 % d'un monomère contenant un groupe alcoxysilyl. De préférence, elle contient également (c) de 0,1 à 10 % d'un monomère contenant un groupe absorbant l'ultraviolet.

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