Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1993-08-25
1995-10-03
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
2641761, 528167, 528196, C08G 6400
Patent
active
054553245
ABSTRACT:
Disclosed herein is an aromatic polycarbonate resin containing benzophenone and benzoate ester derivatives which have a molecular weight less than 1,000, each in an amount of 100 ppm or less. Also disclosed is a process for preparing an aromatic polycarbonate resin from an aromatic dihydroxy compound and a carbonate diester in which the benzophenone derivative content is 100 ppm or less by transesterification, comprising preparing a polycarbonate prepolymer having a viscosity average molecular weight of 5,000 to 20,000 using an iminocarboxylic acid or salt thereof as a transesterification catalyst and polymerizing the prepolymer in an extruder.
The aromatic polycarbonate is colorless and transparent and is suitable for extrusion molding.
REFERENCES:
patent: 3410823 (1968-11-01), Cleveland
patent: 3492268 (1970-01-01), Baker
patent: 3897392 (1975-07-01), Haupt et al.
patent: 4383092 (1983-05-01), Ko et al.
patent: 4514357 (1985-04-01), Kawaguchi et al.
patent: 4628081 (1986-12-01), Mark et al.
patent: 4948871 (1990-08-01), Fuknoka et al.
patent: 5204377 (1993-04-01), Fukawa et al.
patent: 5214073 (1993-05-01), Fukawa et al.
Database WPI, Derwent Publications, AN 80-91213C, JP-B-61 039 972, Sep. 6, 1986.
Database WPI, Derwent Publications, AN 92-213351, JP-A-4 142 329, May 15, 1992.
Patent Abstracts of Japan, vol. 17, No. 30 (C-1018), Jan. 20, 1993, JP-A-04 249 531, Sep. 4, 1992.
Polymer Degradation and Stability, vol. 14, 1986, pp. 1-22, A. Rivation, et al., "The Photo-Chemistry Of Bisphenol-A Polycarbonate Reconsidered: Part 2--FTIR Analysis Of The Solid-State Photo-Chemistry In `Dry` Conditions".
Journal of Polymer Science, vol. 23, No. 2, Feb. 1985, pp. 343-353, CH. Bailly, et al., "Crystallization Of Bisphenol-A Polycarbonate Induced By Organic Salts: Chemical Modification Of The Polymer. I. Model Reactions".
H. Schnell, "Chemistry And Physics Of Polycarbonates," pp. 44-51.
Kashiwagi Takeshi
Kimura Masatoshi
Nukui Masahiro
Shoji Hidekazu
Tayama Takao
Mitsubishi Chemical Corporation
Mosley Terressa
Seidleck James J.
LandOfFree
Aromatic polycarbonate resin of improved color does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aromatic polycarbonate resin of improved color, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aromatic polycarbonate resin of improved color will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1078215