Coated substrate having a water swellable coating
First Claim
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1. A coated substrate, comprising:
- (a) a substrate having an exterior surface;
(b) a water swellable semi-gel coating comprising a particulate superabsorbent polymer dispersed in a polyvinyl chloride plastisol, wherein the coating is applied to the exterior surface of the substrate for substantially blocking the penetration of water through the semi-gel coating.
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Abstract
A method for forming a water swellable coating and a water swellable coating for forming a coated substrate are provided. The water swellable coatings are semi-gel dispersions of particulate superabsorbent polymer in a polyvinyl chloride plastisol. A dispersion is formed from the polymer and plastisol, then contacted with a substrate and heat cured to a semi-gel state. The coatings are capable of swelling in the presence of water to protect the substrates from water penetration, block water from penetrating the coatings to reach other substrates or to retain water to prevent leakage.
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12 Claims
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1. A coated substrate, comprising:
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(a) a substrate having an exterior surface;
(b) a water swellable semi-gel coating comprising a particulate superabsorbent polymer dispersed in a polyvinyl chloride plastisol, wherein the coating is applied to the exterior surface of the substrate for substantially blocking the penetration of water through the semi-gel coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification