Process for preparing halogenated aromatic hydroxy ethers

Details Process for preparing halogenated aromatic hydroxy ethers Process for preparing halogenated aromatic hydroxy ethers

1976-12-23

1978-06-13

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252182, 260 457P, 260 775R, C07C 4102

Patent

active

040949109

ABSTRACT:
An oxyalkylated, halogenated product useful in making polyurethane foams is prepared by reacting an epoxide compound with a halogenated aromatic hydroxyl-containing compound (phenol) which is either a monohydroxy or polyhydroxy compound. Said aromatic hydroxyl compound has a hydroxy group attached directly to the aromatic nucleus. By the process of the invention, hydroxyalkylation occurs in the presence of a catalyst selectively active in the predominant oxyalkylation of aromatic hydroxyl groups, said catalyst selected from the group consisting of zinc, magnesium and a zinc or magnesium salt as defined. The reaction mixture can include an aliphatic hydroxyl-containing compound, a neutral phosphorus compound, and aliphatic or aromatic anhydrides or mixtures thereof to enhance the flame-retardant properties of the oxyalkylated product.

REFERENCES:
patent: 2807651 (1957-09-01), Britton et al.
patent: 3274129 (1966-09-01), Bailey
Colclough et al., Jour. of Polymer Science, vol. 34 (1959) pp. 171-174.

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