Linear polyesters based on s-triazinedicarboxylic acids

Claim 2

A linear, thermoplastic polyester having a relative viscosity of 1.1 to 3.0, measured at 30° C. on a 1% strength solution consisting of equal parts of phenol and tetrachloroethane, characterised by the structural elements of the general formula I ##STR6## wherein R denotes an aliphatic radical having 1 to 6 C atoms or the para-phenylene radical, R' represents methyl, ethyl, phenyl or cyclohexyl, A denotes a diradical selected from the group consisting of ##STR7## wherein R" and R'" represent H atoms, chlorine atoms or bromine atoms, or R" represents a H atom and R'" represents a chlorine or bromine atom, and R 1 and R 2 represents methyl or ethyl, or conjointly represent pentamethylene, D denotes an aliphatic radical having 2 to 10 C atoms, and the mol fraction (x/x+y) formed from x and y has values of 0.1 to 1, and x and y each denote a number from 1 to 30, and y can also be 0.

Claim 3

A polyester according to claim 1 having a relative viscosity of 1.3 to 2.5, characterised in that, in the formula I, R denotes the para-phenylene radical, R' denotes ethyl or phenyl, A denotes the radical of the formula ##STR8## wherein R" and R'" represent H atoms, chlorine atoms or bromine atoms, and R 1 and R 2 each represent the methyl group, D denotes an aliphatic radical having 2 to 4 C atoms, and the mol fraction (x/x+y) formed from x and y has values of 0.4 to 0.9, x and y each denoting a number from 1 to 30.

Claim 4

A polyester according to claim 1, characterised in that, in the formula I, R represents the para-phenylene radical, R' represents the phenyl or ethyl group, A represents the 1,1'-methylene-bis-[3-ethylene-5,5-dimethylhydantoin] radical and D represents the butylene radical.

Claim 5

A polyester according to claim 1, characterised in that, in the formula I, R represents the para-phenylene radical, R' represents the phenyl group, A represents the 1,3-diethylene-4,5,6,7-tetrachlorobenzimidazolone radical and D represents the butylene radical.

Claim 6

Process for the manufacture of a linear, thermoplastic polyester having the structural elements of the formula I ##STR9## wherein R denotes an aliphatic radical having 1 to 6 C atoms or the para-phenylene radical, R' represents methyl, ethyl, phenyl or cyclohexyl, A denotes a diradical selected from the group consisting of ##STR10## wherein R" and R'" represent H atoms, chlorine atoms or bromine atoms, or R" represents a H atom and R'" represents a chlorine or bromine atom, and R 1 and R 2 represent methyl or ethyl, or conjointly represent pentamethylene, D denotes an aliphatic radical having 2 to 10 C atoms, x and y each represent a number from 1 to 30 and y can also be 0, characterised in that x+ y mols of s-triazinedicarboxylic acids or polyester-forming derivatives thereof, of the formula II ##STR11## wherein Q represents a hydrogen atom, an alkyl group having 1 to 6 C atoms or the phenyl group, are polycondensed with x mols of a diol selected from the group consisting of a diol of the formula III ##STR12## and y mols of a diol of the formula VI HO--D--OH (VI) in a molar ratio corresponding to the mol fraction (x/x+ y)= 0.1 to 1.0 and in the presence of catalysts, to a relative viscosity of 1.1 to 3.0, measured at 30° C. on a 1% strength solution consisting of equal parts of phenol and tetrachloroethane.

Claim 7

Process for the manufacture of a linear, thermoplastic polyester having the structural elements of the formula I ##STR9## wherein R denotes an aliphatic radical having 1 to 6 C atoms or the para-phenylene radical, R' represents methyl, ethyl, phenyl or cyclohexyl, A denotes a diradical selected from the group consisting of ##STR10## wherein R" and R'" represent H atoms, chlorine atoms or bromine atoms, or R" represents a H atom and R'" represents a chlorine or bromine atom, and R 1 and R 2 represent methyl or ethyl, or conjointly represent pentamethylene, D denotes an aliphatic radical having 2 to 10 C atoms, x and y each represent a number from 1 to 30 and y can also be 0, characterised in that x+ y mols of s-triazinedicarboxylic acids or polyester-forming derivatives thereof, of the formula II ##STR11## wherein Q represents a hydrogen atom, an alkyl group having 1 to 6 C atoms or the phenyl group, are polycondensed with x mols of a diol selected from the group consisting of a diol of the formula III ##STR12## and y mols of a diol of the formula VI HO--D--OH (VI) in a molar ratio corresponding to the mol fraction (x/x+ y)= 0.1 to 1.0 and in the presence of catalysts, to a relative viscosity of 1.1 to 3.0, measured at 30° C. on a 1% strength solution consisting of equal parts of phenol and tetrachloroethane.

Claim 8

Process according to claim 5, characterised in that x+ y mols of s-triazinedicarboxylic acid diesters of the formula II wherein R 1 denotes a lower alkyl group having 1 to 4 C atoms or the phenyl group, R denotes the para-phenylene radical and R' represents ethyl or phenyl, and x and y denote integers, are polycondensed, in a molar ratio corresponding to the mol fraction (x/x+ y)= 0.4 to 0.9, to a relative viscosity of 1.3 to 2.5, with x mols of the diol of the formula III or of a diol of the formula IV or V and y mols of an aliphatic diol of the formula VI wherein D denotes an aliphatic radical having 2 to 4 C atoms.

Claim 9

Process according to claim 5, characterised in that 2-diphenylamino- or 2-diethylamino-4,6-bis-(p-ethoxycarbonylanilino)-s-triazine is used as the s-triazinedicarboxylic acid derivative of the formula II.

Claim 10

Process according to claim 5, characterised in that 1,1'-methylene-bis-[3-(2-hydroxyethyl)-5,5-dimethylhydantoin] is used as the diol of the formula III and 1,3-di-(2-hydroxyethyl)-4,5,6,7-tetrachlorobenzimidazolone is used as the diol of the formula IV.