Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1981-12-29
1983-08-23
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528126, 528128, 528172, 528175, 528210, 528211, 528212, 528214, 528215, 528216, 528217, 528218, 528219, C08G 6540, C08G 7523
Patent
active
044004990
ABSTRACT:
Described herein is an integrated process for the preparation of substantially linear high molecular weight thermoplastic polymers derived from aryl polyhalide monomers. Aryl polyhalide monomers are first prepared by the reaction of an alkali metal salt of a phenol compound, e.g., dipotassium salt of bisphenol A, with a dihalobenzenoid compound, e.g., 4,4'-dichlorophenylsulfone, in a liquid phase of an aprotic solvent and an azeotrope former, e.g., toluene. Water is removed from the reaction mass as an azeotrope until substantially anhydrous conditions are attained. The aryl polyhalide monomers are then coupled by contacting the monomers with a catalyst mixture of a nickel compound and a ligand in the presence of a reducing metal, e.g., zinc, and an aprotic solvent under substantially anhydrous conditions to form substantially linear high molecular weight thermoplastic polymers.
REFERENCES:
patent: 4105635 (1978-08-01), Freeman
patent: 4105636 (1978-08-01), Taylor
patent: 4108837 (1978-08-01), Johnson et al.
patent: 4113698 (1978-09-01), Staniland
patent: 4195175 (1979-11-01), Johnson et al.
patent: 4263466 (1981-04-01), Colon et al.
patent: 4275186 (1981-06-01), Kawakami et al.
patent: 4307222 (1981-12-01), Schwab et al.
Michio Zembayashi et al., Nickel-Phosphine Complex-Catalyzed Homo Coupling . . . , Tetrahedran Letters No. 47, 4089-4092 (1977).
Takakazu Yamamoto et al., A Novel Type of Polycondensation . . . , Bull. Chem. Soc. Japan 51 (7), 2091-2097 (1978).
Coon Gerald L.
Lee Lester L.
Papuga Donald M.
Union Carbide Corporation
LandOfFree
Integrated process for the preparation of substantially linear h does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Integrated process for the preparation of substantially linear h, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated process for the preparation of substantially linear h will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1947920