Process for the production of liquid bromine-containing alkoxyla

Details Process for the production of liquid bromine-containing alkoxyla Process for the production of liquid bromine-containing alkoxyla

1985-10-09

1986-11-04

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252182, 521132, 521159, 521171, 524710, 524758, 524792, 528 76, 568581, 568614, C08G 1814

Patent

active

046211047

ABSTRACT:
Liquid bromine-containing alkoxylation products of butyne-(1,4)-diol which are storage stable are produced. More specifically, 1.5 to 2.5 mols alkylene oxide are reacted with each mol of butyne-(1,4)-diol present at elevated temperature in the presence of a catalyst. The catalyst is selected from (1) thioethers having a molecular weight of up to 5000 obtained by adding a mercaptan and/or mercaptoalcohol to an unsaturated hydrocarbon and/or (2) thioethers other than those of (1) having a molecular weight of from 500 to 5000 and/or (3) alkali metal chlorides. This alkoxylation product is then reacted with bromine at -10.degree. to 80.degree. C. The bromide is reoxidized with aqueous hydrogen peroxide solution, stabilized with a relatively non-volatile epoxide and dehydrated. The product thus obtained is particularly useful in the production of flame resistant isocyanate addition products such as polyurethane foams.

REFERENCES:
patent: 3292191 (1966-12-01), Kamborian
patent: 3366557 (1968-01-01), Foulke et al.
patent: 3764546 (1973-10-01), Feltzin et al.
patent: 3839465 (1974-10-01), Schneider et al.
patent: 4020024 (1977-04-01), Walraevens et al.
patent: 4128532 (1978-12-01), Eimers et al.

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