Process for producing lactone polymer and an anti-shrinking thermosetting resin composition having formulated therein said lactone polymer as an anti-shrinking agent
US4835213A · kind A · utility
8Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Feb 26, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a lactone polymer which comprises reacting an ester compound synthesized from an alcohol and an acid or acid anhydride thereof with a lactone and a ring-opening polymerization initiator without being accompanied by condensation. The thus produced lactone polymer is effective for preventing shrinkage of thermosetting resins, particularly unsaturated polyester resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.