Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1987-08-04
1988-12-27
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, 528171, 528174, 528196, 528202, 528204, C08G 6362
Patent
active
047941561
ABSTRACT:
High molecular weight polyhalobisphenol polycarbonates are produced by adding phosgene to a polyhalobisphenol in the alkali metal phenate form whereby the chloroformates of the bisphenol are formed and then adding an activated pyridine such as 4-aminopyridines or 2-substituted pyridines to generate a high molecular weight polycarbonate having an inherent viscosity in the range from about 0.4 to about 0.9.
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Aguilar Jose L.
Ho Thoi H.
Kao Che I.
Kassell Frederick B.
Anderson Harold D.
Colley B. G.
The Dow Chemical Company
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