Polycarbonate resin with a reduced volatile chlorine content and

Details Polycarbonate resin with a reduced volatile chlorine content and Polycarbonate resin with a reduced volatile chlorine content and

1997-12-09

1999-11-16

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, C08G 6400

Patent

active

059860375

ABSTRACT:
There is provided a polycarbonate resin with a reduced volatile chlorine content in which the amount of a chlorinous matter as volatilized from the resin when the resin is heated at 280.degree. C. for 30 minutes and then allowed to stand at room temperature for 3 days is 30 ppb or lower as calculated in terms of the amount of Cl atom. There is also provided a process for producing a polycarbonate resin using phosgene as a raw material, the improvement comprising using phosgene having a chlorine concentration of up to 1,000 ppb as the raw material thereby to provide the resin with a reduced volatile chlorine content.

REFERENCES:
patent: 3895045 (1975-07-01), Firth, Jr.

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