Process for preparing flame retardant thermoplastic polyesters

Details Process for preparing flame retardant thermoplastic polyesters Process for preparing flame retardant thermoplastic polyesters

1975-08-26

1978-04-18

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 75NK, C08G 6376, C08K 340

Patent

active

040850862

ABSTRACT:
A process for preparing a flame retardant thermoplastic polyester which comprises reacting a low molecular weight polyester having terminal hydroxyl groups with a polyfunctional isocyanate, said low molecular weight polyester being one synthesized using as its acid component a compound selected from the group consisting of terephthalic acid and its lower alkyl esters of 1-4 carbon atoms and as its alcohol component 1,4-butanediol and a compound selected from the group consisting of an alkylene oxide adduct of 2 - 4 carbon atoms of tetrabromobisphenol A and an alkylene oxide adduct of 2 - 4 carbon atoms of tetrachlorobisphenol A.

REFERENCES:
patent: 2762789 (1956-09-01), Fisher et al.
patent: 2843568 (1958-07-01), Benning et al.
patent: 3403132 (1968-09-01), Waller
patent: 3639655 (1972-02-01), Jones
patent: 3676376 (1972-07-01), Svoboda et al.
patent: 3787526 (1974-01-01), Burns et al.
patent: 3887523 (1975-06-01), Yau et al.
patent: 3935166 (1976-01-01), Kanai et al.

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