Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1981-11-17
1983-07-26
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528128, 528173, 528176, 528179, 528180, 528182, 528190, 528191, C08G 6364
Patent
active
043955347
ABSTRACT:
A process for producing an aromatic polyester carbonate resin in which the molar ratio of the dihydric phenolic compound residue to aromatic dicarboxylic acid residue to carbonate bond is in the range of 2:0.5:1.5-2:1.4:0.6 and these constituent components form an alternating configuration of high regularity, said process comprising a first step wherein in producing a hydroxyl-terminated aromatic oligocarbonate by reacting a dihydric phenolic compound with a halogenated carbonyl compound in a reaction medium consisting of water and a water-immiscible solvent in the presence of a basic inorganic compound, the reaction is carried out by using the basic inorganic compound in an amount of 0.6-1.6 moles per mole of the dihydric phenolic compound and the halogenated carbonyl compound in an amount of 0.3-0.8 mole per mole of the dihydric phenolic compound to form a reaction product mixture consisting predominantly of a phenolic hydroxyl-terminated oligocarbonate of a degree of polymerization of 1-3, and a second step in which an esterification reaction is carried out by reacting the reaction product mixture obtained in the first step with an aromatic dicarboxylic acid dichloride in the presence of a basic inorganic compound in an amount at least sufficient to neutralize the free phenolic hydroxyl groups that remain in the reaction product mixture.
REFERENCES:
patent: 4105633 (1978-08-01), Swart et al.
patent: 4252939 (1981-02-01), Mori et al.
patent: 4255556 (1981-03-01), Segal
patent: 4297455 (1981-10-01), Lindner et al.
patent: 4330662 (1982-03-01), Bales
Harada Masahiro
Nomura Isao
Shimizu Senzo
Taniyama Susumu
Usui Motohachi
Lee Lester L.
Mitsubishi Gas Chemical Company Inc.
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