Melt polymerization process for preparing a melt processable resorcinol phthalate polyester utilizing a metal acetate catalyst
US4127560A · kind A · utility
29Cited by
4References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1977 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Aug 8, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/19
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A melt processable resorcinol phthalate polyester having a terephthalic acid content not greater than about 30 mole percent is prepared by a two-stage process utilizing an alkali or alkaline earth metal acetate catalyst. The first stage yields a non-volatile pre-polymer which is then melt polymerized to the resorcinol phthalate polyester. A process for preparing a melt processable resorcinol phthalate polyester from resorcinol by reacting it with an acetylating agent is also disclosed. The resulting polyester exhibits high char and low flammability in addition to being melt processable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.