Method of making a coated substrate having a water swellable coating layer
AssigneeFiber-Line, Inc.
InventorsVincent J. Pappas, Louis A. Vitola, Vernon Z. Detwiler
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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.
Claims10
A method for making a coated substrate, comprising:
- (a) preparing a dispersion comprising a particulate superabsorbent polymer and a liquid plastisol, the liquid plastisol comprising a polyvinyl chloride resin and a plasticizer;
- (b) contacting a substrate with the dispersion to form a coating layer of the dispersion on the substrate;
- and
- (c) heat curing the coating layer without fully fusing the coating layer for a period of time sufficient to form a water swellable, semi-gel coating layer.
Dependencies are inferred from the claim text.