Ambient temperature curing coating composition
AssigneeAkzo Nobel Coatings International B.V.
InventorSteve Alister Nixon
Life of this patent
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Abstract
Ambient temperature curing coating composition comprising—a branched alkoxy-functional polysiloxane having the formula R2-O-[Si(R1)2—O]n—R2, wherein each R1 is selected from the group consisting of alkyl, aryl, and alkoxy groups having up to six carbon atoms, and Osi(OR3)3 groups, wherein each R3 independently has the same meaning as R1, each R2 is selected from the group consisting of hydrogen and alkyl and aryl groups having up to six carbon atoms, and wherein n is selected such that the molecular weight of the polysiloxanes is in the range of from 500 to about 2,000,—a catalyst, and—an acrylic polymer. The acrylic polymer is substantially free of functional groups that can react with the polysiloxane or with the catalyst in the coating composition.
Claims17
Ambient temperature curable coating composition comprising
- a branched alkoxy-fimctional polysiloxane having the formula
- wherein each R1 is independently selected from the group consisting of alkyl groups having up to six carbon atoms, aryl groups having up to six carbon atoms, alkoxy groups having up to six carbon atoms, and OSi(OR3)3 groups, wherein each R3 independently has the same meaning as R1 each R2 is independently selected from the group consisting of hydrogen, allyl, and aryl groups having up to six carbon atoms, and wherein n is selected such that the molecular weight of the polysiloxanes is in the range of from 200 to about 5,000,
- an amino-functional catalyst,
- an acrylic polymer which is substantially free of functional groups that can react with the polysiloxane or with the catalyst in the coating composition,
- wherein said coating composition comprises more than 60% by weight solids.
Dependencies are inferred from the claim text.