Patent · US Expired

Polyesters containing (meth)acrylate end groups

US6602963B2 · kind B2 · utility

3Cited by

7References

22Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Werner Siol · Pfungstadt, DE
Peter Pokinskyj · Roßdorf, DE

Key dates

Filing date	Jan 14, 2002
Grant date	Aug 5, 2003
Priority date	—
Expiry date	Feb 8, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F222/102
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention describes polyesters containing (meth)acrylate end groups, of the general formula (I) CH2&boxH;CRCOO—PE—OCOCR&boxH;CH2 where R=CH3 or H, where PE=[—A—OCO—B—COO—]m—A—, [—CHR′—COO—]n—A—[—OCOCHR′—]n, 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 CH3, 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) CH2&boxH;CRCOO—A—OCOCR&boxH;CH2 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.