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:
Apr. 11, 2000
Filed:
Nov. 18, 1998
Riken Vinyl Industry Co., Ltd., Tokyo, JP;
Abstract
The invention provides a process for the preparation of a thermoplastic elastomeric resin composition comprising (a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed of a vinyl aromatic compound and at least one polymeric block (B) composed of a conjugated diene compound, or a hydrogenated block copolymer, (b) 20 to 300 parts by weight of a non-aromatic softening agent for rubber, (c) 1 to 100 parts by weight of a peroxide-crosslinking type olefinic resin or a copolymeric rubber containing said resin, and (d) 10 to 150 parts by weight of a peroxide-decomposition type olefinic resin or a copolymer containing said resin, characterized in that the process comprises a step of heat-processing component (a), component (b), at least a part of component (c) and a part of component (d) in the presence of an organic peroxide to cause crosslinking, and a subsequent step of blending these with the remaining part of component (d) and, if any, the remaining part of component (c). The obtained composition is soft and good in rubber properties, mechanical strength and processability, and is less sticky.