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:
Aug. 02, 1977
Filed:
Sep. 13, 1976
Maurice Douek, Los Angeles, CA (US);
Gustav A Schmidt, South Pasadena, CA (US);
Bernard M Malofsky, Bloomfield, CT (US);
Martin Hauser, West Hartford, CT (US);
Avery International Corporation, San Marino, CA (US);
Loctite Corporation, Newington, CT (US);
Abstract
There are provided curable anaerobic pressure sensitive adhesive stocks in the form of sheets and tapes in which the adhesive is contained between two differential release surfaces. This construction permits total pressure sensitive adhesive transfer to a substrate which is to be firmly secured to another substrate upon the exclusion of oxygen and initiation of cure of the anaerobic resin. The compositions are those, based on the total weight of the composition, containing from about 4 to about 40 percent by weight of a first anaerobic resin having a viscosity up to about 1000 cps at 25.degree. C from 0 to about 80 percent by weight of a second anaerobic resin having a viscosity greater than about 1000 cps at 25.degree. C, from about 9 to 95 percent by weight of a thermoplastic resin system, from 0 to about 10 percent of a latent accelerator and about 0.1 to about 10 percent of a hydroperoxide catalyst, the composition having static shear at 0.25 in.sup.2 at a load of 250 gram greater than 10 minutes, a Polyken tack of greater than 700 grams, a loop tack greater than 1.5 lbs/in.sup.2 and a 180.degree. peel greater than 2 lbs. An external primer may be provided to accelerate cure.