Process for improving water-whitening resistance of pressure sensitive adhesives
AssigneeRohm and Haas Company
InventorTimothy G. Wood
Life of this patent
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Abstract
A process is disclosed for improving the water-whitening resistance of a pressure sensitive adhesive containing an aqueous latex emulsion and water-soluble ions by removing the water-soluble ions and adjusting the pH of the pressure sensitive adhesive formulation to at least about 6.0. The preferred method of removing the water-soluble ions is to contact either the aqueous latex emulsion, the formulated pressure sensitive adhesive containing the aqueous latex emulsion, or both with ion exchange resin. The product produced by the process is also disclosed.
Claims4
A process for improving the water-whitening resistance of a pressure sensitive adhesive containing an aqueous latex emulsion, where the pressure sensitive adhesive or the aqueous latex emulsion contain water-soluble ions, comprising:
- (a) removing the water-soluble ions;
- and
- (b) adjusting the pH of the pressure sensitive adhesive formulation to at least about 6.0.
Dependencies are inferred from the claim text.