Epoxidized modified acetophenone/formaldehyde resins
US4960840A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Aug 18, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/934
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyglycidyl ethers which are obtainable by reacting acetophenone with 0.7 to 1.4 mol of formaldehyde per mol of acetophenone, in the presence of an alkaline catalyst and in the temperature range from 50.degree. to 100.degree. C., to a carbonylated acetophenone/formaldehyde resin, hydrogenating said carbonylated resin to a modified hydroxylated acetophenone/formaldehyde resin, subsequently converting said resin with epichlorohydrin, in the presence of a phase transfer catalyst, into the corresponding polychlorohydrin ether, and dehydrochlorinating said ether with a base, are suitable for use as epoxy resins, for example for the preparation of powder coating compositions having good resistance to chemicals and good adhesion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.