Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-02-14
1999-03-09
Short, Patricia A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525390, C08G 6548, C08G 6538
Patent
active
058802215
ABSTRACT:
The present invention deals with the distribution of polyphenylene ethers 1. by reacting the polyphenylene ether in solution with a phenolic compound, wherein special phenolic compounds are used. The redistribution reaction can be performed in toluene or in toluene/alcohol blends. The reaction can be run in the presence or the absence of a catalyst. By using a process for the redistribution of polyphenylene ethers by reacting the polyphenylene ether in solution with a phenolic compound, wherein the polyphenylene ether is reacted with a phenolic compound with formula 3 wherein the phenolic rings are disubstituted with methyl groups or ethyl groups in the ortho positions and the group X is separated from the phenolic ring through at least two carbon atoms and the phenolic compound has a molecular weight of not more than 400 g/mol, preferably not more than 300 g/mol and the redistribution is performed in a mixture of toluene and methanol with 1-30 volume % of methanol or in toluene in the presence of a phase transfer catalyst such as tri (C8-C1O alkyl) methyl ammonium chloride as a promoter; and a diphenoquinone, preferably of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone is used as a catalyst and the molar concentration of the phenolic compound is chosen between 0.9 to 1.1 times the molar quantity of monomeric units in the polyphenylene ether in the reaction solution, more than 90% of the phenolic compound can be incorporated in the polyphenylene.
REFERENCES:
patent: 3306874 (1967-02-01), Hay
patent: 3306875 (1967-02-01), Hay
patent: 3367978 (1968-02-01), White
patent: 3496236 (1970-02-01), Cooper et al.
patent: 3496239 (1970-02-01), Hamilton et al.
patent: 4234706 (1980-11-01), White
patent: 4859739 (1989-08-01), Yates et al.
patent: 5039781 (1991-08-01), Neugebauer et al.
patent: 5128422 (1992-07-01), Kowalczik et al.
patent: 5315042 (1994-05-01), Cipullo
XP-002063818--The Synthesis of 4-Hydroxyarylene Ethers by the Equilibration of Phenols with Poly (2,6-dimethyl-1-1, 4-phenylene ether).
A.S. Hay, H.S. Blanchard, G.F. Endres, J.W.Eutace, J.Am.Chem.Soc. 81,6335 (1959).
D.M. White: J. Org. Chem. 34,297 (1969).
C.D. Cooper, A.R. Gilbert, H. Finkbeiner, Polymer Preprints (Am.Chem. Soc., Div. Polym. Chem.)7,166 (1966).
D.A. Bolon Org. Chem. 34, 1584 (1969).
D.M. White: J. Pol.Sci. Part A-1, 9,663 (1971).
D.M. White: Macromolecules 12, No. 5, 1008 (1979).
H.A.M. van Aert et al., Macromolecules 28, 7967 (1995).
H.S.-I Chao and J.M. Whalen: Reactive Polymers 15, 9 (1991).
V. Percec et al.: Makromol. Chem., Macromol. Symp. 54/55,275 (1992).
J.M. Tingerthal et al.: J. Polym. Sci., Part A, Polym. Chem. 25(8) 2043 (1987).
D. Aycock, V. Abolins nd D.M. White, in Encyclopedia of Polymer Science & Engineering, 2.sup.nd ed., vol. 13, H.F. Mark, N.M. Bikales, C.G. Overberger & G. Menges Eds., Wiley, NY 1988, p.l.
D.M. White, in Comprehensive Polymer Science, vol. 5, G.Allen & J.C. Bevington Eds., Pergamon, Oxford, 1989, p. 473.
James Wang & V. Percec, Phase transer . . ., polymer Bulletin 25, 25-32, 1991).
D. White, Reactions of Poly (phenylene oxide . . .) J. Poly. Sci., 19, 1367-83 (1981).
A.M. Van Aert, Controlled Molecular Weight . . ., JMS-PureAppl. Chem., A32(3), pp. 515-523 (1995).
Roderic P. Quirk Lin-fang Zhu, Anionic synthesis of chain-end . . ., Makromol. Chem. 190, 487-493 (1989).
Herbert S.I. Chao & Jana M. Whalen, Preparation of Poly (2,6-Dimethyl-. . .J. App. Poly. Sci. 49, 1537-46 (1993).
Van Aert, HAM, et al., J. Macromol. Sci., Pure & Appl. Chem,. v. A32 (1995), p. 515.
Akira Mitui, et al., Kobunshi Ronbunshu (1994), 51 (3), 157-66 (Abstract).
Sigeki Takayama et al., Kobunshi Ronbunshu (1994), 51 (7), 479-85.
de Wit Gert
Liska Juraj
van Aert Hubertus Adrianus Maria
General Electric Company
Short Patricia A.
LandOfFree
Redistribution of polyphenylene ethers and polyphenylene ethers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Redistribution of polyphenylene ethers and polyphenylene ethers , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redistribution of polyphenylene ethers and polyphenylene ethers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1322088