The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 1996
Filed:
Jan. 27, 1995
Ralph J Shuman, Needham, MA (US);
Barbara J Burns, Auburn, MA (US);
Avery Dennison Corporation, Pasadena, CA (US);
Abstract
An adhesive composition which undergoes a change from colored to colorless upon application to a substrate. The composition comprises a shape-giving base, the shape-giving base comprising a gel of a gel-forming salt of an aliphatic carboxylic acid having from about 8 to 36 carbon atoms with a cation selected from the group consisting of alkali metals, ammonia and lower alkylamines in an aqueous liquid selected from the group consisting of water and mixtures of water with water-miscible organic solvents. In a preferred embodiment, the aforementioned gel-forming salt of an aliphatic carboxylic acid is sodium stearate. The composition additionally includes an adhesive component selected from the group consisting of water-soluble and water dispersible adhesives. In a preferred embodiment, the adhesive component is polyvinylpyrrolidone. The composition further includes triethanolamine and a colored indicator which upon exposure to air becomes colorless, the colored indicator being a phthalein, such as phenolphthalein. The adhesive composition is preferably in stick-form disposed in an applicator, such as a reclosable tube dispenser.