Patent ID: 6166168
Filing Date: 2000-12-26
Classification: B01D,C08G,C08L,Y10S

Abstract:
A polyalkyl ether/polyaryl ether sulfone or ketone copolymer which has a reduced viscosity, measured at 35.degree. C. in a mixed solvent of phenol and 1,1,2,2-tetrachloroethane in a weight ratio of 6/4, of at least 0.5 dl/g and which essentially consists of recurring units represented by the following formula (1):--[O--Ar.sup.1 --Z--Ar.sup.2 --O--Ar.sup.3 --]-- (1)wherein Ar.sup.1, Ar.sup.2 and Ar.sup.3 are the same or different and each a divalent aromatic hydrocarbon group which may be substituted and Z is >C.dbd.O or >SO.sub.2,and recurring units represented by the following formula (2):--[--(OR).sub.n --O--Ar.sup.3 --]-- (2)wherein R is an alkylene group having 2 or 3 carbon atoms or a combination of an alkylene group having 2 or 3 carbon atoms and an alkylene group having 4 carbon atoms, Ar.sup.3 is defined the same as above and n is a numeral which ensures that the molecular weight of a unit represented by --(OR).sub.n -- is in the range of 400 to 20,000,the recurring units represented by the above formula (2) being present at least two on an average in one molecule, and the proportion of the unit represented by --(RO).sub.n -- in the above formula (2) being 10 to 90% by weight based on the total weight of the recurring units of the above formulas (1) and (2).