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:
Dec. 02, 1996
Filed:
May. 29, 1995
Glenn R Himes, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
Adhesive and sealant compositions having improved resistance to a degradation which comprises: (a) a hydrogenated triblock, multiblock, radial, or star block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene, (b) from 3 to 50 percent by weight of the total composition of a hydrogenated diblock copolymer of a vinyl aromatic hydrocarbon and a conjugated diene wherein the overall molecular weight of the diblock ranges from 8000 to 100,000, the molecular weight of the poly vinyl aromatic hydrocarbon block ranges from 4000 to 32,000, the molecular weight of the poly conjugated diene block ranges from 3000 to 90,000, and the vinyl aromatic hydrocarbon content ranges from 30 to 70 percent by weight of the diblock copolymer, and (c) 20 to 400 parts by weight per 100 parts by weight of total block copolymers of a tackifying resin.