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US 4,954,544 AGranted
Modified adhesive composition which undergoes color changes upon application
AssigneeConros Corporation
InventorAshok K. Chandaria
Life of this patent
Estimating the term…
Abstract
Adhesive compositions are provided containing additives which improve application characteristics and which undergo a color change upon application to a substrate. The adhesive composition is preferably in stick-form disposed in an applicator such as a reclosable tube dispenser.
Claims11
An adhesive composition, which upon application to a substrate, undergoes a change from colored to colorless, said composition comprised of:
- (a) polyvinylpyrrolidone in an aqueous organic medium with a soap forming gelling agent, p1 (b) a colored indicator additive which upon exposure to air becomes colorless, and which has the formula:
- ##STR2## wherein each R individually represents hydrogen or lower alkyl, (c) a carbamide, and
- (d) a non-ionic surfactant.
Dependencies are inferred from the claim text.