Flexibilized chemically resistant epoxy resin
US4532299A · kind A · utility
15Cited by
7References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1983 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Jan 21, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for flexibilizing an epoxy resin is disclosed which comprises (a) preparing a dicarboxy-terminated prepolymer by reacting a carboxylic anhydride with a polybutadiene having a minor amount of pendant vinyl groups at a temperature from about 125.degree. to about 140.degree. F.; (b) reacting the prepolymer with an excess of liquid epoxy resin at a temperature from about 180.degree. to about 200.degree. F.; (c) adding a vinyl monomer in an amount of about 2% to about 25% of the mixture; and (d) adding epoxy and vinyl polymerization catalysts to cure the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.