Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
236 words
A process for producing oxybenzoyl copolyesters comprising 3 to 300 of at least a portion of a repeating unit of the formula, ##STR11## wherein m and n are each 0 or 1, and W is --O--, --SO 2 --, --S--, or --CO--, which comprises reacting at least a portion of the amount present of a compound of the formula (II), ##STR12## wherein R 1 is a hydrogen atom, a benxyl, lower alkyl or phenyl group, and Y is a hydrogen atom or a lower alkanoyl group, with at least a portion of the amount present of a compound of the formula (III), ##STR13## wherein X is a halogen atom, in the presence of an aliphatic, alicyclic or aromatic hydrocarbon solvent having a boiling point of 100° to 260° C. under atmospheric pressure to produce bis(carboxyphenyl)phthalate, adding a compound of the formula (V), ##STR14## wherein W is --O--, --SO 2 --, --S-- or --CO--, Z is a hydrogen atom or an alkanoyl group, and m and n are each 0 or 1, and optionally a compound of the formula (IV), ##STR15## wherein R 2 and R 3 are each a hydrogen atom, a benzyl, lower alkyl or phenyl group, and carrying out polycondensation with the removal of the solvent and by-products so that the polymerization system is made substantially free from the solvent at least at the end of the polycondensation to carry out substantial bulk polycondensation.
Claim 2
Dependent Claim
236 words
A process for producing oxybenzoyl copolyesters comprising 3 to 300 of at least a portion of a repeating unit of the formula, ##STR11## wherein m and n are each 0 or 1, and W is --O--, --SO 2 --, --S--, or --CO--, which comprises reacting at least a portion of the amount present of a compound of the formula (II), ##STR12## wherein R 1 is a hydrogen atom, a benxyl, lower alkyl or phenyl group, and Y is a hydrogen atom or a lower alkanoyl group, with at least a portion of the amount present of a compound of the formula (III), ##STR13## wherein X is a halogen atom, in the presence of an aliphatic, alicyclic or aromatic hydrocarbon solvent having a boiling point of 100° to 260° C. under atmospheric pressure to produce bis(carboxyphenyl)phthalate, adding a compound of the formula (V), ##STR14## wherein W is --O--, --SO 2 --, --S-- or --CO--, Z is a hydrogen atom or an alkanoyl group, and m and n are each 0 or 1, and optionally a compound of the formula (IV), ##STR15## wherein R 2 and R 3 are each a hydrogen atom, a benzyl, lower alkyl or phenyl group, and carrying out polycondensation with the removal of the solvent and by-products so that the polymerization system is made substantially free from the solvent at least at the end of the polycondensation to carry out substantial bulk polycondensation.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein said oxybenzoyl copolyesters contain at least 50 mole % of the structure of the formula (I).
Claim 4
Dependent Claim
23 words
A method according to claim 2, wherein said oxybenzoyl copolyesters contain at least 70 mole % of the structure of the formula (I).
Claim 5
Dependent Claim
25 words
A method according to claim 1, wherein the boiling point of the solvent is within a range of 120° to 230° C. under atmospheric pressure.
Claim 6
Dependent Claim
50 words
A method according to claim 4, wherein the solvent is a member selected from the group consisting of ethylbenzene, xylene, cumene, n-propylbenzene, p-diethylbenzene, o-, m-, and p-cymene, n-butylbenzene, o-, m-, and p-ethyltoluene, 1,2,3,4-tetramethylbenzene, 1,2,3,5-tetramethylbenzene, 1,2,4,5-tetramethylbenzene, 1-methylanthracene, indane, β-ethylnaphthalene, biphenyl, octane, cyclooctane, nonane, decane, undecane, dodecane, tridecane, tetradecane, α-methylnaphthalene and β-methyl-naphthalene.