Process for the preparation of polycarbonates having sulfonanili

Details Process for the preparation of polycarbonates having sulfonanili Process for the preparation of polycarbonates having sulfonanili

1982-11-04

1984-09-11

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, 528204, C08G 6362

Patent

active

044711042

ABSTRACT:
The present invention relates to the preparation of aromatic polycarbonates by the known two-phase interface process, from diphenols characterized in that aromatic sulfonanilides are used as chain terminators in amounts of about 2 mol % to 20 mol %, preferably in amounts of about 2.5 mol % to 10 mol %, relative to mols of diphenols employed. In addition, the present invention relates to the aromatic polycarbonates obtainable by the process according to the invention. The products of this invention have been found to have better self extinguishing property compared to polycarbonates without sulfonamide end groups.

REFERENCES:
patent: 3186961 (1965-06-01), Sears
patent: 4041003 (1977-08-01), Adelmann et al.
patent: 4188475 (1980-02-01), Margotte
Hackh's Chemical Dictionary, 4th Edition, pp. 47 and 646.

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