Claims
- 1. A linear thermoplastic polyester which has a relative viscosity of at least 1.30, measured on a solution of 1 gram of polyester in 100 ml of a solvent consisting of equal parts of phenol and symmetrical tetrachloroethane at 30.degree. C., which comprises the condensation product in about a 1:1 molar ratio of diacids (a) and (b) with diols (c) and (d) so that the composition of the polyester comprises
- (a) from 25 to 50 mol %, based on total polyester, of radicals of at least one dicarboxylic acid which contain NH groups and is of the formula I
- hooc--a--(co).sub.n --NH--X--NH--(CO).sub.n --A--COOH (I)
- in which A represents o-phenylene, m-phenylene, p-phenylene, 1,4-naphthylene or 1,6-naphthylene,
- n is 0 or 1, and
- X, when n is 0, represents a radical of formula II ##STR14## in which R is methyl, ethyl, cyclohexyl or phenyl, or x, when n is 1, represents a divalent hydrocarbon radical of aliphatic or aromatic character;
- (b) from 25 to 0 mol %, based on the total polyester, of radicals of terephthalic acid, isophthalic acid or a mixture thereof; and
- in the diol component of the polyester
- (c) from 0 to 25 mol %, based on the total polyester, of radicals of one or more diols containing aliphatic diol groups; and
- (d) from 50 to 25 mol %, based on the total polyester, of radicals of at least one bisphenol derivative of formula III ##STR15## in which R.sup.1 represents hydrogen, methyl or ethyl, R.sup.2 represents hydrogen, chloro, bromo or methyl, and Y represents methylene, ethylene, phenylmethylene, diphenylmethylene, methylphenylmethylene, alkylidene of 2 to 4 carbon atoms, 1,1-dichloroethylidene, 1,1,1-trichloroethylidene, cycloalkylidene of 5 to 8 carbon atoms, a direct bond, O, S or SO.sub.2,
- wherein the radicals (a) and (b) are attached to radicals (c) and (d) through ester linkages in a random distribution.
- 2. A polyester according to claim 1, which has a relative viscosity of 1.5-3.5.
- 3. A polyester according to claim 1 containing from 40 to 50 mol % of component (a), from 10 to 0 mol % of component (b), from 10 to 0 mol % of component (c), and from 40 to 50 mol % of component (d).
- 4. A polyester according to claim 1, wherein, in formula I, A represents m-phenylene or p-phenylene.
- 5. A polyester according to claim 1, wherein R, in formula II, represents ethyl or phenyl.
- 6. A polyester according to claim 3 containing 50 mol % of component (a), and 50 mol % of component (d).
- 7. A polyester according to claim 4 wherein A is p-phenylene.
- 8. A polyester according to claim 1 wherein x, as a divalent hydrocarbon radical, represents alkylene of 1 to 12 carbon atoms; or cycloalkylene, alkylcycloalkylene, alkylenecycloalkylene, alkylenecycloalkylenealkylene, alkylenealkylcycloalkylene, arylene, alkylarylene, alkylenearylene or alkylenearylenealkylene, which contains a total of 5 to 15 carbon atoms.
- 9. A polyester according to claim 1, wherein the diol is a linear or branched alkylenediol having 2 to 12 carbon atoms.
- 10. A polyester according to claim 1, wherein the diol containing aliphatic diol groups is of the general formula IV ##STR16## in which R.sup.3 represents methyl or a hydrogen atom and Z represents a radical of the formulae Va-Vc ##STR17## in which R.sup.4, R.sup.5 and R.sup.6 independently of one another represent alkyl having 1 to 4 C atoms or together represent tetramethylene or pentamethylene, and the R.sup.7 independently of one another represent a hydrogen, chlorine or bromine atom.
- 11. A polyester according to claim 10, wherein R.sup.3 represents a hydrogen atom, R.sup.4, R.sup.5 and R.sup.6 represent methyl and all of the R.sup.7 represent either a hydrogen atom, a chlorine atom or a bromine atom.
- 12. A polyester accordng to claim 1, wherein, in formula III, R.sup.1 represents methyl or a hydrogen atom and R.sup.2 is bonded in the two ortho-positions relative to the oxygen atom.
- 13. A polyester according to claim 1 wherein, in formula III, R.sup.2 represents a hydrogen atom.
- 14. A polyester according to claim 1, wherein Y is ethylidene, 1,1- or 1,2-propylidene, 1,1-dichloro- or 1,1,1-trichloro-ethylidene, butylidene, cyclohexylidene, methylene, ethylene, phenylmethylene, diphenylmethylene or methylphenylmethylene.
- 15. A polyester according to claim 1, wherein the diol of the formula III is 2,2-bis-[4'-(.beta.-hydroxyethoxy)-phenyl]-propane.
- 16. A polyester according to claim 8 wherein cycloalkylene contains 5 to 7 carbon atoms in the ring, arylene represents phenylene, and alkylene in alkylenecycloalkylene, alkylenecycloalkylenealkylene, alkylenealkylcycloalkylene, alkylenearylene or alkylenearylenealkylene contains 1 to 4 carbon atoms.
- 17. A polyester according to claim 16, wherein X, in formula I, represents phenylene, cyclohexylene or a radical of the formulae ##STR18##
- 18. A polyester according to claim 16 wherein alkylene contains 1 to 2 carbon atoms.
- 19. A polyester according to claim 9 wherein the alkylenediol contains 2 to 6 carbon atoms.
- 20. A polyester according to claim 19 wherein the alkylenediol is ethylene glycol or tetramethylene glycol.
- 21. A polyester according to claim 10 wherein R.sup.3 is hydrogen.
- 22. A polyester according to claim 12 wherein R.sup.1 is hydrogen.
Parent Case Info
This application is a continuation in part of application Ser. No. 836,941, filed Sept. 27, 1977 and now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3393180 |
Thoma et al. |
Jul 1968 |
|
3717614 |
Lyssy et al. |
Feb 1973 |
|
3772250 |
Economy et al. |
Nov 1973 |
|
3920611 |
Rio et al. |
Nov 1978 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
836941 |
Sep 1977 |
|