Heat-resting aromatic polyestersulfone and process for preparing the same
AssigneeKanegauchi Kagaku Kogyo Kabushiki Kaisha
InventorsHiroshi Iwakiri, Masahiro Asada, Kazuya Yonezawa
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Abstract
An aromatic polyestersulfone having improved heat resistance, film-forming property, hydrolysis resistance and mechanical strength which comprises 1 to 100% by mole of recurring units of the general formula: ##STR1## and 99 to 0% by mole of recurring units of the general formula: ##STR2## wherein R and R' are the same or different and each is an alkyl or alkoxyl group having 1 to 4 carbon atoms, Ar is a bivalent aromatic group, and x and y are 0 or an integer of 1 to 4 provided that the sum of x and y is from 1 to 8.
Claims14
An aromatic polyestersulfone consisting essentially of (a) 30 to 100% by mole of units of the formula:
- ##STR15## and (b) 70 to 0% by mole of units of the formula:
- ##STR16## wherein a is 0 or 1, and X is a bivalent group selected from the group consisting of an alkylidene group having 1 to 8 carbon atoms, a cycloalkylidene group having 1 to 8 carbon atoms, --O--, --S-- and --CO--.
An aromatic polyestersulfone consisting essentially of units of the formula:
- ##STR17##
A process of preparing a heat-resisting aromatic polyestersulfone which comprises reacting an alkali metal salt of a difunctional phenol compound with a substantially equimolar amount of terephthaloyl dichloride, isophthaloyl dichloride or a mixture thereof in the presence of a phase transfer agent, said difunctional phenol compound being a mixture consisting essentially of 30 to 100% by mole of bis(4-hydroxy-3,5-dimethylphenyl)sulfone and 70 to 0% by mole of a substituted phenol compound of the formula:
- ##STR18## wherein a is 0 or 1, and X is a bivalent group selected from the group consisting of an alkylidene group having 1 to 8 carbon atoms, a cycloalkylidene group having 1 to 8 carbon atoms, --O--, --S-- and --CO--.
A film or sheet of an aromatic polyestersulfone consisting essentially of (a) 30 to 100% by mole of units of the formula:
- ##STR19## and (b) 70 to 0% by mole of units of the formula:
- ##STR20## wherein a is 0 or 1, and X is a bivalent group selected from the group consisting of an alkyliden group having 1 to 8 carbon atoms, a cycloalkylidene group having 1 to 8 carbon atoms, --O--, --S--.
A film or sheet of an aromatic polyestersulfone consisting essentially of units of the formula:
- ##STR21##
Dependencies are inferred from the claim text.