Thermoplastic polyimide as flow promoter and flame retardant synergist for filled polyamide compositions

Patent metadata

Field	Value
Publication number	US-9328241-B2
Application number	US-201213612399-A
Country	US
Kind code	B2
Filing date	Sep 12, 2012
Priority date	Sep 12, 2012
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

Disclosed herein are compositions comprising polyamides, thermoplastic polyimides, and inorganic fillers. The compositions can also comprise a flame retardant additive. Also disclosed are materials and devices made thereof. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

First claim

What is claimed is:

1. A composition comprising:
(a) about 30% to about 80% by weight polyamide;
(b) about 2% to about 15% by weight thermoplastic polyimide; and
(c) about 30% to about 50% by weight inorganic filler,
wherein the composition has a melt viscosity that is at least 10% lower as compared to a substantially identical composition but without the thermoplastic polyimide as determined by test method ISO 11443 at the same temperature and at the same shear rate.

2. The composition of claim 1 , further comprising above 0% to about 20% by weight of at least one flame retardant additive.

3. The composition of claim 1 , wherein the thermoplastic polyimide is a polyetherimide.

4. The composition of claim 1 , wherein the thermoplastic polyimide is present in an amount of about 2% to about 10% by weight of the composition.

5. The composition of claim 1 , wherein the polyamide is present in an amount of about 40% to about 60% by weight of the composition.

6. The composition of claim 2 , wherein the flame retardant additive is present in an amount of about 10% to about 16% by weight of the composition.

7. The composition of claim 2 , wherein the flame retardant additive is selected from the group consisting of halogen-free phosphinate, halogen-free disphosphinate, reaction product of melamine with phosphoric acid, phosphazene compounds, and mixtures thereof.

8. The composition of claim 2 , wherein the flame retardant additive comprises aluminum phosphinate and melamine polyphosphate.

9. The composition of claim 3 , wherein the polyetherimide is selected from the group consisting of polyetherimide homopolymer, copolymer, and mixtures thereof.

10. The composition of claim 1 , wherein the inorganic filler is selected from the group consisting of glass fiber, carbon fiber, glass flake, ceramic fiber, and mixtures thereof.

11. The composition of claim 1 , wherein the inorganic filler is selected from the group consisting of glass fiber, carbon fiber, and mixtures thereof.

12. The composition of claim 1 , wherein the polyamide is polyphthalamide.

13. The composition of claim 1 , wherein the polyamide is selected from the group consisting of PA9T, PA6T, PA6I, PA6-6T, PA6-6IT, PA6M-T, and mixtures thereof.

14. A device comprising the composition of claim 1 .

15. The device of claim 14 , wherein the device is a computer.

16. The composition of claim 1 , wherein the composition has a melt viscosity that is at least 20% lower as compared to a substantially identical composition but without the thermoplastic polyimide as determined by test method ISO 11443 at a the same temperature and at the same shear rate.

17. The composition of claim 2 , wherein the composition has a flammability rating of V0 as determined by test method UL 94.

18. A new composition comprising:
(d) about 30% to about 80% by weight polyamide;
(e) about 2% to about 15% by weight thermoplastic polyimide; and
(f) about 30% to about 50% by weight inorganic filler,
wherein the composition has a notched IZOD impact strength that is at least 100% of the notched IZOD impact strength of a substantially identical composition but without the thermoplastic polyimide as determined by test method ASTM D256.

19. A composition comprising:
(g) about 30% to about 80% by weight polyamide;
(h) about 2% to about 15% by weight thermoplastic polyimide; and
(i) about 30% to about 50% by weight inorganic filler,
wherein the composition has a notched IZOD impact strength that is at least 90% of the notched IZOD impact strength of a substantially identical composition but without the thermoplastic polyimide as determined by test method ASTM D256 and wherein the composition has a melt viscosity that is at least 10% lower as compared to a substantially identical composition but without the thermoplastic polyimide as determined by test method ISO 11443 at same temperature and at the same shear rate.

Assignees

• Zheng Yun
• Song Shijie
• Ganguly Anirban
• An Yuxian
• Sabic Global Technologies Bv

Inventors

• Zheng Yun
• Song Shijie
• Ganguly Anirban
• An Yuxian

Classifications

• C08L77/06 Primary

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

• C08K7/14

  Glass · CPC title

• C08L77/00 Primary

  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

• C08K5/5313

  Phosphinic compounds, e.g. R2=P(:O)OR' · CPC title

• C08G69/36

  derived from amino acids, polyamines and polycarboxylic acids · CPC title