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:
May. 26, 1992
Filed:
May. 23, 1991
Applicant:
Inventors:
Eit Drent, Amsterdam, NL;
Anthonius J Breed, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528271 ; 528205 ; 528392 ;
Abstract
Polyesters or polyanhydrides are produced by reaction of non-conjugated dienes with diols or dicarboxylic acids, respectively, in the presence of a catalyst composition formed from a palladium compound, a monodentate phosphorus ligand optionally employed with a bidentate phosphorus ligand and a limited amount of a protonic acid having a pKa below 2, in the substantial absence of water. The polymer products are useful as constituents of sealants, adhesives and paints.