Process for the production of a branched polycarbonate with emul

Details Process for the production of a branched polycarbonate with emul Process for the production of a branched polycarbonate with emul

1993-03-12

1994-02-01

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528128, 528129, 528137, 528148, 528171, 528173, 528174, 528176, 528179, 528191, 528193, 528196, 528198, 528201, 528202, C08G 6424

Patent

active

052833143

ABSTRACT:
A process for producing a branched polycarbonate comprising reacting a dihydric phenol, such as 2,2-bis(4-hydroxyphenyl) propane, a polyfunctional organic compound, such as 1,1,1-tris-(4-hydroxyphenyl)ethane, and phosgene to produce a polycarbonate oligomer, and then polycondensing with stirring the polycarbonate oligomer with a dihydric phenol, such as 2,2-bis(4-hydroxyphenyl) propane, and a monohydric phenol, such as p-tert butylphenol, whereby the interfacial area of the resultant emulsion is not less than 40 m.sup.2 /L.

REFERENCES:
patent: 4001184 (1977-01-01), Scott
patent: 4048200 (1977-09-01), Tresper et al.
patent: 4415723 (1983-11-01), Hedges et al.
patent: 4695620 (1987-09-01), Masumoto et al.
patent: 4888400 (1989-12-01), Boden et al.

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