2,2-Bis[4-(2,3-dibromopropoxy)-3,5-dibromophenyl]-propane proces

Details 2,2-Bis[4-(2,3-dibromopropoxy)-3,5-dibromophenyl]-propane proces 2,2-Bis[4-(2,3-dibromopropoxy)-3,5-dibromophenyl]-propane proces

1980-02-11

1981-11-24

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 4101

Patent

active

043026141

ABSTRACT:
2,2-Bis[4-(2,3-dibromopropoxy)-3,5-dibromophenyl]-propane (BDDP) has the structural formula ##STR1## This bisphenol-A derivative is prepared by reaction of 2,2-bis[4-hydroxy-3,5-dibromophenyl]-propane with an allyl halide and subsequent bromination of the diallyl ether obtained. In the first reaction step, a lower aliphatic alcohol is used as solvent, and in the second reaction step an aromatic halogenated hydrocarbon. The reaction product is then precipitated by excess alcohol, and separated. The BDDP is obtained in the form of granules and is suitable for application as flameproofing agent.

REFERENCES:
patent: 3895077 (1975-07-01), Brady et al.

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