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. 20, 1993
Filed:
Oct. 31, 1990
Neil S Davidson, Stirling, GB;
Geoffrey Harrison, Hertfordshire, GB;
Kenneth Wilkinson, Pertshire, GB;
BP Chemicals Limited, London, GB;
Abstract
A photodegradable polymer composition comprising 50 to 99 weight percent based on the total weight of photodegradable polymer composition of a thermoplastic addition polymer and 1 to 50 weight percent based on the total weight of the photodegradable polymer composition of a photodegrading agent, said photodegrading agent being a polyketone which is a linear copolymer consisting of units of --CO(C.sub.2 H.sub.4)-- and units --CO(B')-- where B' is derived from olefinically unsaturated hydrocarbon selected from the group consisting of CHR.sub.4 .dbd.CHR.sub.5 (I) and CH.sub.2 .dbd.C(R.sub.6)(CHR.sub.7 R.sub.8) (II), wherein R.sub.4 is a hydrocarbyl group, R.sub.5 is hydrogen or a hydrocarbyl group, R.sub.6 is a hydrocarbyl group, and R.sub.7 and R.sub.8 are individually hydrogen or hydrocarbyl groups.