Melt polymerization process for preparing a melt processable res

Details Melt polymerization process for preparing a melt processable res Melt polymerization process for preparing a melt processable res

1977-08-08

1978-11-28

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528275, 528305, C08G 6318

Patent

active

041275608

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.

REFERENCES:
patent: 2035578 (1936-03-01), Wagner
patent: 2595343 (1952-05-01), Drewitt et al.
patent: 3160602 (1964-12-01), Kantor et al.
patent: 4011199 (1977-03-01), McFarlane

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