FLOW IN REINFORCED POLYIMIDE COMPOSITIONS

• US 20130001824A1
• Filed: 06/30/2011
• Published: 01/03/2013
• Est. Priority Date: 06/30/2011
• Status: Active Grant

• Current Assignee: SHPP Global Technologies BV
• Original Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Inventors: Lingannaiah, Chandrashekhar, Sinha, Reema, Kumanan, Anton, Ganguly, Anirban, Mitra, Susanta, Bolvari, Anne, Yun, Zheng
• Granted Patent: US 8,784,719 B2
• Time in Patent Office: Days
• US Class Current: 264/241
• CPC Class Codes: B29B 7/90 Fillers or reinforcements , e.g. fibres
• CPC Class Codes: C08K 7/02 Fibres or whiskers
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 77/00 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 Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors

Abstract

Reinforced polyimide compositions that include a reinforcing filler and a polyamide flow promoter improve flow promotion while maintaining other mechanical, thermal, flame and/or electrical properties of the compositions. The compositions may include an inorganic or organic reinforcing filler, a polyimide resin such as polyetherimide or polyamideimide and a small amount of an aromatic or aliphatic polyamide as the flow promoter. The resulting compositions may be used in thinner-wall applications while still retaining the advantageous physical properties of reinforced polyimide compositions not having the flow promoter. 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.

Claims

1. A reinforced polyimide composition comprising:

(a) from about 10 wt % to 60 wt % of a reinforcing filler;

(b) from about 1 wt % to about 10 wt % of a polyamide flow promoter; and

(c) weight % balance of a polyimide resin;

wherein the composition exhibits a linear flow during injection molding of at least about 10% greater than that of a reference reinforced polyimide composition consisting essentially of substantially the same proportions of the same polyimide resin and the same reinforcing filler, in the absence of polyamide flow promoter, under substantially identical injection molding conditions.

2. The composition of claim 1, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

or a combination including at least one of the foregoing polyimide resins.

3. The composition of claim 1, wherein the reinforcing filler is selected from glass fiber, glass flake, glass beads, carbon fiber, aramid fiber, or a combination including at least one of the foregoing reinforcing fillers.

4. The composition of claim 1, wherein the polyamide flow promoter is selected from nylon 6, nylon 66, polyphthalamide (PPA), nylon 11, nylon 610, nylon 410, nylon 1010, nylon 1012, and nylon 510, or a combination including at least one of the foregoing polyamide flow promoters.

5. The composition of claim 1, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

wherein the reinforcing filler comprises glass fibers; and

wherein the polyamide flow promoter comprises polyphthalamide.

6. A reinforced polyimide composition comprising:

(a) a polyimide resin;

(b) a reinforcing filler in an amount resulting in a resin;

filler ratio of from about 1;

2 to about 9;

1; and

(c) a polyamide flow promoter in an amount effective such that the composition exhibits a linear flow during injection molding of at least about 10% greater than that of a reference reinforced polyimide composition consisting essentially of substantially the same proportions of the same polyimide resin and the same reinforcing filler, in the absence of polyamide flow promoter, under substantially identical injection molding conditions.

7. The composition of claim 6, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

or a combination including at least one of the foregoing polyimide resins.

8. The composition of claim 6, wherein the reinforcing filler is selected from glass fiber, glass flake, glass beads, carbon fiber, aramid fiber, or a combination including at least one of the foregoing reinforcing fillers.

9. The composition of claim 6, wherein the polyamide flow promoter is selected from nylon 6, nylon 66, polyphthalamide, or a combination including at least one of the foregoing polyamide flow promoters.

10. The composition of claim 6, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

wherein the reinforcing filler comprises glass fibers; and

wherein the polyamide flow promoter comprises polyphthalamide.

11. A method of increasing linear flow during injection molding of a reinforced polyimide composition, the method comprising combining a polyimide resin, a reinforcing filler, and a polyamide flow promoter;

wherein the reinforcing filler is combined in an amount resulting in a resin;

filler ratio of from about 1;

2 to about 9;

1; and

wherein the polyamide flow promoter is combined in an amount effective such that the composition exhibits a linear flow during injection molding of at least about 10% greater than that of a reference reinforced polyimide composition consisting essentially of substantially the same proportions of the same polyimide resin and the same reinforcing filler, in the absence of polyamide flow promoter, under substantially identical conditions.

12. The method of claim 11, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

or a combination including at least one of the foregoing polyimide resins.

13. The method of claim 11, wherein the reinforcing filler is selected from glass fiber, glass flake, glass beads, carbon fiber, aramid fiber, or a combination including at least one of the foregoing reinforcing fillers.

14. The method of claim 11, wherein the polyamide flow promoter is selected from nylon 6, nylon 66, a polyphthalamide, or a combination including at least one of the foregoing polyamide flow promoters.

15. The method of claim 11, wherein the polyimide resin is selected from a polyetherimide, polyamideimide;

or a combination including at least one of the foregoing polyimide resins, wherein the reinforcing filler comprises glass fibers; and

wherein the polyamide flow promoter comprises a polyphthalamide.

16. A method of restoring injection molding linear flow loss in a reinforced polyimide composition, the method comprising adding, to a mixture of polyimide resin and a reinforcing filler, a polyamide flow promoter in an amount sufficient to restore at least about 10% of flow loss observed when comparing injection molding linear flow rate of a reference reinforced polyimide composition consisting essentially of substantially the same proportions of the same polyimide resin and the same reinforcing filler, in the absence of polyamide flow promoter, under substantially identical injection molding conditions, to injection molding linear flow rate of a substantially identical unfilled reinforced polyimide, in the absence of polyamide flow promoter, under substantially identical injection molding conditions.

17. The method of claim 16, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

or a combination including at least one of the foregoing polyimide resins.

18. The method of claim 16, wherein the reinforcing filler is selected from glass fiber, glass flake, glass beads, carbon fiber, aramid fiber, or a combination including at least one of the foregoing reinforcing fillers.

19. The method of claim 16, wherein the polyamide flow promoter is selected from nylon 6, nylon 66, polyphthalamide, or a combination including at least one of the foregoing polyamide flow promoters.

20. The method of claim 16, wherein the polyimide resin is selected from polyetherimide, polyamideimide;

wherein the reinforcing filler comprises glass fibers; and

wherein the polyamide flow promoter comprises polyphthalamide.