Polyamide molding compositions with improved optical properties and use of colorants therein

Patent metadata

Field	Value
Publication number	US-11155692-B2
Application number	US-201816757625-A
Country	US
Kind code	B2
Filing date	Dec 17, 2018
Priority date	Dec 18, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

Disclosed is a method of reducing a haze value in molding compositions including use of colorants selected from anthraquinone colorants, benzimidazolone colorants and perinone colorants. The molding compositions include at least one polyamide and at least one compound of the general formula (I)where x is 1, 2 or 3; R1 and R2 are mutually independently selected from hydrogen, linear C1-C7-alkyl, branched C3-C10-alkyl, unsubstituted or substituted C3-C12-cycloalkyl, unsubstituted or substituted C3-C12-cycloalkyl-C1-C4-alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C1-C4-alkyl; and Z is selected from C3-C10-alkanediyl, unsubstituted or substituted arylene, unsubstituted or substituted arylene-C1-C4-alkylene-arylene, unsubstituted or substituted heteroarylene, unsubstituted or substituted heteroarylene-C1-C4-alkylene-heteroarylene, unsubstituted or substituted C5-C8-cyclo-alkylene, unsubstituted or substituted C5-C8-cycloalkylene-C1-C4-alkylene-C5-C8-cycloalkylene, unsubstituted or substituted heterocycloalkylene and unsubstituted or substituted heterocycloalkylene-C1-C4-alkylene-heterocycloalkylene.

First claim

The invention claimed is:

1. A method of reducing a haze value, the method comprising:
using colorants selected from anthraquinone colorants, benzimidazolone colorants and perinone colorants, in molding compositions comprising at least one polyamide and at least one compound of the general formula (I)

wherein
x is 1, 2 or 3;
R 1 and R 2 are mutually independently selected from hydrogen, linear C 1 -C 7 -alkyl, branched C 3 -C 10 -alkyl, unsubstituted or substituted C 3 -C 12 -cycloalkyl, unsubstituted or substituted C 3 -C 12 -cycloalkyl-C 1 -C 4 -alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C 1 -C 4 -alkyl, and Z is selected from C 3 -C 10 -alkanediyl, unsubstituted or substituted arylene, unsubstituted or substituted arylene-C 1 -C 4 -alkylene-arylene, unsubstituted or substituted heteroarylene, unsubstituted or substituted heteroarylene-C 1 -C 4 -alkylene-heteroarylene, unsubstituted or substituted C 5 -C 8 -cyclo-alkylene, unsubstituted or substituted C 5 -C 8 -cycloalkylene-C 1 -C 4 -alkylene-C 5 -C 8 -cyclo-alkylene, unsubstituted or substituted heterocycloalkylene and unsubstituted or substituted heterocycloalkylene-C 1 -C 4 -alkylene-heterocycloalkylene;
wherein the haze value is reduced by at least 10%, determined by ASTM D1003 with a layer thickness of 1.27 mm in comparison with a reference polyamide composition without the colorants.

2. The method according to claim 1 , wherein the quantity used of the colorants is from 10 to 1000 ppm, based on the entire molding composition.

3. The method according to claim 1 , wherein the ratio by weight in which the colorants are used in relation to the at least one compound of the general formula (I) is in the range from 1:1 to 1:1000.

4. The method according to claim 1 , characterized in that the colorants are dyes, pigments or mixtures of these.

5. The method according to claim 1 , wherein the colorant is a benzimidazolone colorant.

6. A molding composition comprising:
as component A, at least one polyamide;
as component B, from 0.1 to 2% by weight of at least one compound of the general formula (I),

where
x is 1, 2 or 3;
R 1 and R 2 are mutually independently selected from hydrogen, linear C 1 -C 7 -alkyl, branched C 3 -C 10 -alkyl, unsubstituted or substituted C 3 -C 12 -cycloalkyl, unsubstituted or substituted C 3 -C 12 -cycloalkyl-C 1 -C 4 -alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C 1 -C 4 -alkyl, and
Z is selected from C 3 -C 10 -alkanediyl, unsubstituted or substituted arylene, unsubstituted or substituted arylene-C 1 -C 4 -alkylene-arylene, unsubstituted or substituted heteroarylene, unsubstituted or substituted heteroarylene-C 1 -C 4 -alkylene-heteroarylene, unsubstituted or substituted C 5 -C 8 -cyclo-alkylene, unsubstituted or substituted C 5 -C 8 -cycloalkylene-C 1 -C 4 -alkylene-C 5 -C 8 -cyclo-alkylene, unsubstituted or substituted heterocycloalkylene and unsubstituted or substituted heterocycloalkylene-C 1 -C 4 -alkylene-heterocycloalkylene; and
as component C, from 10 to 1000 ppm of at least one colorant selected from anthraquinone colorants, benzimidazolone colorants and perinone colorants and mixtures thereof,
where the quantities are based on the entire molding composition.

7. The molding composition according to claim 6 , which comprises at least 60% by weight of component A.

8. The molding composition according to claim 7 , which comprises at least 80% by weight of component A.

9. The molding composition according to claim 8 , which comprises at least 90% by weight of component A.

10. The molding composition according to claim 6 , wherein the quantity of component B is from 0.2 to 1.7% by weight.

11. The molding composition according to claim 10 , wherein the quantity of component B is from 0.5 to 1.5% by weight.

12. The molding composition according to claim 6 , wherein the quantity of component C is from 20 to 500 ppm.

13. The molding composition according to claim 12 , wherein the quantity of component C is from 50 to 200 ppm.

14. The molding composition according to claim 6 , wherein the ratio by weight of component C to component B is from 1:1 to 1:1000.

15. The molding composition according to claim 14 , wherein the ratio by weight of component C to component B is from 1:5 to 1:700.

16. The molding composition according to claim 15 , wherein the ratio by weight of component C to component B is from 1:10 to 1:500.

17. The molding composition according to claim 6 , wherein Z in the compound of the general formula (I) is trans-1,4-cyclohexylene.

18. The molding composition according to claim 17 , wherein in the compound of the general formula (I) R 1 and R 2 are identical and are selected from hydrogen, tert-butyl, 1,1-dimethylpropyl, 1,5-dimethylhexyl, 1,1,3,3-tetramethylbutyl and 1-adamantyl, Z is trans-1,4-cyclohexylene and x is 1.

19. The molding composition according to claim 6 , wherein the colorant is a benzimidazolone colorant.

20. A process for the production of molding compositions according to claim 6 , which comprises mixing, with one another, components A, B and C and optionally other ingredients.

21. A method of producing fibers, films, or moldings, the method comprising using the molding compositions according to claim 6 .

22. A fiber, film or molding made of a molding composition according to claim 6 .

Assignees

• Basf Se

Inventors

• Richter Florian
• Xalter Rainer

Classifications

• C08L77/06

  Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) · CPC title

• C08K5/0041 Primary

  Optical brightening agents, organic pigments · CPC title

• C08L77/00

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08K5/3477

  Six-membered rings · CPC title

• C08K5/132

  Phenols containing keto groups {, e.g. benzophenones} · CPC title