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. 03, 1999
Filed:
Nov. 15, 1997
Abstract
The present invention provides a primer composition for polyolefins which has sufficient adhesion to polyolefin base materials and excellent resistance to gasohol and high pressure washing of cars. This primer composition for polyolefins comprises: acid anhydride-modified polypropylene chloride (A), which includes polypropylene chloride moiety (a1) and acid anhydride moiety (a2) as bonded thereto, and has a chlorine content of 19.5 to 20.5 wt %, an acid anhydride moiety content of 0.8 to 1.2 wt %, and a weight-average molecular weight of 30,000 to 36,000; and acryl-modified polypropylene chloride (B), which includes polypropylene chloride moiety (b1) and acrylic polymer chain moiety (b2) as grafted thereon, and has a weight-average molecular weight of 30,000 to 200,000, wherein: polypropylene chloride moiety (b1) has a chlorine content of 20 to 30 wt %; acrylic polymer chain moiety (b2) has a glass transition temperature of 60.degree. C. or higher; and the ratio by weight between moieties (b1) and (b2) is b1/b2 =5/95 to 50/50; wherein the ratio by weight between acid anhydride-modified polypropylene chloride (A) and acryl-modified polypropylene chloride (B) is A/B=90/10 to 20/80.