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:
Jul. 29, 1980
Filed:
Jun. 22, 1979
Dilip K Ray-Chaudhuri, Bridgewater, NJ (US);
Eric A Meier, North Brunswick, NJ (US);
National Starch and Chemical Corporation, Bridgewater, NJ (US);
Abstract
Improved storage-stable anaerobic curing adhesive compositions useful as anaerobic adhesives and sealants are prepared by first mixing a polymerizable acrylate ester monomer, an inhibitor for free radical polymerization, a chelator, and at least an effective amount of an accelerator system consisting of an N-substituted sulfonamide and an aromatic tertiary amine. The resultant homogeneous mixture is thereafter maintained at a temperature of at least about 20.degree. C. for a period of time sufficient to provide the composition with anaerobic curing properties and a specified minimum amount of active oxygen. In one embodiment, the mixture is stirred at a temperature of 45.degree.-80.degree. C. for 10-30 hours. In another embodiment, the mixture is maintained at an elevated temperature without stirring.