Method of preparing an acrylic copolymer having an acid anhydride group
US6723813B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2003 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Jun 17, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is a method of preparing an acrylic copolymer having an acid anhydride group with a number average molecular weight of 1,500-5,000 comprising;polymerizing a monomer mixture of a radical polymerizable monomer having an acid anhydride group and another radical polymerizable monomer at a temperature of 150° C. or higher by using a radical initiator,wherein the concentration of the monomer mixture is 50-75 wt %.This method can provide an acrylic copolymer having an acid anhydride group with a relatively low molecular weight that does not cause the problem of yellowing after baking when used in an acid/epoxy curing type clear paint, by means of high temperature polymerization without the use of a large amount of an expensive initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.