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. 05, 2003
Filed:
Jan. 14, 2002
Werner Siol, Darmstadt, DE;
Peter Pokinskyj, Rossdorf, DE;
Merck Patent GmbH, Berlin, DE;
Abstract
The invention describes polyesters containing (meth)acrylate end groups, of the general formula (I) CH ═CRCOO—PE—OCOCR═CH where R=CH or H, where PE=[—A—OCO—B—COO—] —A—, [—CHR′—COO—] —A—[—OCOCHR′—] , or combinations thereof, in which A is an alkylidene radical having 2-20 carbon atoms or an alkoxylidene radical having 2-1000, preferably 2-500, alkoxylidene units, B is a saturated alkylidene radical having 2-10 carbon atoms, R′ is H or CH , m is 1-100, n is 1-100, and, if both m and n are present, the sum m+n is 2-200, where the polyesters containing (meth)acrylate end groups are characterized in that a) the content of short-chain di(meth)acrylates (II) CH ═CRCOO—A—OCOCR═CH is <5% by weight, b) the content of hydroxyl groups is <0.25 mol/mol of (meth)acrylate, and c) the APHA color number is <200.