Process for improving the adhesive properties of ethylene-propylene co- and terpolymers
AssigneeStamicarbon B.V.
InventorsLowhardt A. A. Schoen, Franciscus A. Busschers
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Abstract
A process for improving the adhesive properties of the surface of a body or article derived from co-polymers or terpolymers of ethylene and propylene wherein the surface of the article or body is treated with a primer containing an isocyanate-terminated prepolymer which is the reaction product of a rubber-like, hydroxyl-containing alkadiene-derived polymer and an organic diisocyanate.
Claims8
A process for improving the adhesive properties of a surface of a body derived from copolymers or terpolymers of ethylene and propylene which comprises applying to the surface a layer of a primer containing an isocyannate-terminated prepolymer which is the reaction product of a rubber-like, hydroxyl-containing alkadiene-derived polymer and an organic diisocyanate, wherein the ratio of diisocyanate to every moleequivalent of the hydroxyl groups in the rubber-like polymer is at least 0.9 mole diisocyanate:1 mole equivalent of hydroxyl group.
A process for coating the surface of an ethylene-propylene co-polymer or a terpolymer derived from ethylene and propylene which comprises:
- (a) first coating the surface with one or more layers of a primer containing a reaction product derived from a rubber-like hydroxyl group-containing alkadiene derived polymer and an organic diisocyanate wherein the ratio of diisocyanate to every mole-equivalent of the hydroxyl groups in the rubber-like polymer is 0.9 mole dissocyanate:1 mole equivalent of hydroxyl groups, and (b) subsequently applying a layer of a paint of lacquer to the surface as treated in (a).
Dependencies are inferred from the claim text.