초록 ▼

High molecular weight, linear copolyester compositions having improved thermo-oxidative stability comprising the condensation product of (A) dicarboxylic acids or the C1 to C4 lower alkyl esters thereof, (B) glycols and (C) copolymerizable hindered phenolic comonomers wherein repeat units of said hi

High molecular weight, linear copolyester compositions having improved thermo-oxidative stability comprising the condensation product of (A) dicarboxylic acids or the C1 to C4 lower alkyl esters thereof, (B) glycols and (C) copolymerizable hindered phenolic comonomers wherein repeat units of said hindered phenolic comonomers are present in the copolyesters in an amount ranging from about 0.1 to 10.0 mol percent based on the dicarboxylic acids or the C1 to C4 lower alkyl esters thereof.

대표청구항 ▼

High molecular weight linear copolyester compositions having improved thermo-oxidative stability comprising the condensation product of A. an ester forming reactant selected from the group consisting of aromatic dicarboxylic acids or the C1 to C4 lower alkyl esters thereof, mixtures of two or more o

High molecular weight linear copolyester compositions having improved thermo-oxidative stability comprising the condensation product of A. an ester forming reactant selected from the group consisting of aromatic dicarboxylic acids or the C1 to C4 lower alkyl esters thereof, mixtures of two or more of said aromatic dicarboxylic acids or two or more of the C1 to C4 lower alkyl esters thereof, mixtures of at least one of said aromatic dicarboxylic acids with at least one saturated aliphatic dicarboxylic acid containing from 4 to 10 carbon atoms and mixtures of at least one of the C1 to C4 lower alkyl esters of said aromatic dicarboxylic acids with at least one C1 to C4 lower alkyl ester of said saturated aliphatic dicarboxylic acids containing from 4 to 10 carbon atoms, B. glycols selected from the group consisting of glycols of the series HO(CH2)nOH where n is an integer from 2 to 10 and 1,4-cyclohexanedimethanol and C. copolymerizable hindered phenolic comonomers selected from the group consisting of hindered phenolic comonomers corresponding to the formula where x and n are integers ranging from 0 to 1, m is an integer ranging from 1 to 2, R is a tertiary alkyl radical containing from 4 to 8 carbon atoms and R1 is a radical selected from the group consisting of －CH2OH, －COOH and －COOR2 where R2 is an alkyl radical containing from 1 to 4 carbon atoms and mixtures thereof, and wherein units of said copolymerizable hindered phenolic comonomers are present in the copolyester in an amount ranging from about 0.1 to 10.0 mol percent of (A).