Processes for producing aqueous alkyd resin dispersions
US6887909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Jun 20, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D167/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides production processes of aqueous alkyd resin dispersions, said processes comprising a step of synthesizing alkyd resin by dissolving polyester resin whose chief component is terephthalic acid and which has been recovered from waste materials and regenerated, in a mixture of an alcoholic component, fatty acid and/or oil and fat, and polybasic acid component, said alcoholic component containing tri- or lower polyhydric alcohol and tetra- or higher hydric alcohol at a weight ratio of the former/latter within a range of 0-20, to effect depolymerizaiton and concurrently, esterification reaction; if necessary a step of introducing acid radicals into the resin; and a step of neutralizing and/or dispersing with use of surfactant, the so obtained alkyd resin in water. According to the processes of the present invention, aqueous alkyd resin dispersions can be prepared within a short time, using polyester resin which has been recovered from waste materials and regenerated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.