Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1980-10-24
1983-01-18
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
525439, 528176, 528179, 528182, 528191, 528194, 528370, 528371, 528372, C08G 6364
Patent
active
043693032
ABSTRACT:
A process for producing an aromatic polyesterpolycarbonate, which comprises polycondensing (a) a dihydroxydiaryl compound, (b) a terephthaloyl chloride and/or isophthaloyl chloride reactant, and (c) phosgene by an interfacial polymerization process in the presence of water, methylene chloride and an acid binding agent thereby preparing an aromatic polyesterpolycarbonate product containing structural units of the formula: ##STR1## wherein X is a divalent group, and the aromatic rings may be substituted, and structural units of the formula: ##STR2## wherein X is a divalent group, and the aromatic rings may be substituted, said condensation reaction being characterized in that after at least 95% of the total --COCl groups in the terephthaloyl chloride and/or isophthaloyl chloride and phosgene starting materials has reacted, a chloroformate compound or additional phosgene is added to the reaction mixture in an amount to bring the concentration of --COCl groups to a level of 10 to 1000 .mu.eq/g relative to the total amount of the above starting materials to complete the reaction.
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Polymer Science USSR, vol. 9, 1967, No. 7, Mar., 1968, pp. 1705-1711, G. S. Kolesnikov et al., "Study of Polyestercarbonates Based on Diane, Phosgene and the Dichloride of Terephthalic Acid".
Polymer Science USSR, vol. 10, 1968, No. 1, Oct., 1968, pp. 170-177, H. S. Kolesnikov et al., "The Synthesis and Properties of Mixed Polyesters from Phosgene, Terephthalyl Dichloride and 2,2-DI-(3-methyl-4-hydroxyphenyl) Propane".
Kohyama Katsuhisa
Matsuno Akira
Mori Hazime
Nakamura Katsuhiko
Sakata Katsuyuki
Lee Lester L.
Mitsubishi Chemical Industries Limited
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