Method for preparing crosslinkable polycyclic polycarbonate olig

Details Method for preparing crosslinkable polycyclic polycarbonate olig Method for preparing crosslinkable polycyclic polycarbonate olig

1987-03-24

1988-07-05

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528198, 528200, 528204, 528371, C08G 6362

Patent

active

047555866

ABSTRACT:
Polycyclic polycarbonate oligomers are prepared by the reaction of a bishaloformate and a tetrahydroxyaromatic compound (and optionally also a dihydroxy compound) in the presence of an olefinic tertiary amine and an aqueous slurry of an aldaline earth metal base. The proportion of water in the reaction mixture is up to about 15% by volume of the organic phase. The bishaloformate and hydroxy compounds, and most often also the amine, are preferably added gradually to the other materials.

REFERENCES:
patent: 4644053 (1987-02-01), Brunelle et al.
patent: 4650852 (1987-03-01), Evans et al.

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