Thermally conductive thermoplastic resin compositions

• US 20050176835A1
• Filed: 01/10/2005
• Published: 08/11/2005
• Est. Priority Date: 01/12/2004
• Status: Abandoned Application

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Fredrickson, Becky, Kobayashi, Toshikazu
• Application Number:
  US11/032,468
• Publication Number:
  US 20050176835A1
• Time in Patent Office: Days
• US Class Current: 521/56
• CPC Class Codes: C08G 2261/514 Electron transport
• CPC Class Codes: C08K 3/10 Metal compounds
• CPC Class Codes: C08K 3/16 Halogen-containing compounds
• CPC Class Codes: C08K 5/1345 Carboxylic esters of phenolcarboxylic acids
• CPC Class Codes: C08K 7/02 Fibres or whiskers
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08L 2205/12 containing additives being liquid crystalline or anisotropic in the melt
• CPC Class Codes: C08L 23/0884 Epoxide containing esters
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• 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 77/02 Polyamides derived from omega-amino carboxylic acids or from lactams thereof C08L77/10 takes precedence
• CPC Class Codes: C08L 77/06 Polyamides derived from polyamines and polycarboxylic acids C08L77/10 takes precedence
• CPC Class Codes: H01L 23/3737 Organic materials with or without a thermoconductive filler
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

Thermally conductive thermoplastic polymer resin compositions comprising thermoplastic polymer, calcium fluoride, and, optionally, one or more of fibrous filler, liquid crystalline polymer, and polymeric toughening agent. The compositions are particularly useful for molded or extruded parts.

Claims

1. A thermally conductive thermoplastic polymer composition, comprising:

(a) about 15 to about 70 weight percent of at least one isotropic thermoplastic polymer selected from the group consisting of thermoplastic polyesters, polyamides, polyacetals, polycarbonates, polyphenylene oxides, polyphenylene sulfides, polysulphones, polyarylates, polyetheretherketones, polyetherketoneketones, and syndiotactic polystyrenes;

(b) about 30 to about 70 weight percent of uncoated calcium fluoride;

(c) 0 to about 30 weight percent of at least one fibrous filler;

(d) 0 to about 40 weight percent of at least one liquid crystalline polymer and;

(e) 0 to about 15 weight percent of at least one polymeric toughening agent,

the above stated percentages being based on the total weight of the composition.

2. The composition of claim 1 wherein the fibrous filler is present in from 5 to about 30 weight percent, based on the total weight of the composition.

3. The composition of claim 1 wherein the liquid crystalline polymer is present in from about 5 to about 40 weight percent, based on the total weight of the composition.

4. The composition of claim 1 wherein the thermoplastic polymer is at least one thermoplastic polyester.

5. The composition of claim 1 wherein the polymeric toughening agent is present in about 2 to about 15 weight percent, based on the total weight of the composition.

6. The composition of claim 1 wherein the fibrous filler is wollastonite.

7. The composition of claim 4 wherein the polymeric toughening agent is a copolymer of ethylene, butyl acrylate, and glycidyl methacrylate and/or a copolymer of ethylene, ethyl acrylate, and glycidyl methacrylate.

8. The composition of claim 4 wherein the polymeric toughening agent is a core-shell acrylic polymer.

14. An article made from the composition of claim 1.

15. The article of claim 14 in the form of a motor housing.

16. The article of claim 14 in the form of an automotive lamp housing.

9. A thermally conductive thermoplastic polymer composition, comprising:

(a) about 15 to about 70 weight percent of at least one isotropic thermoplastic selected from the group consisting of thermoplastic polyesters, polyamides, polyacetals, polycarbonates, polyphenylene oxides, polyphenylene sulfides, polysulphones, polyarylates, polyetheretherketones, polyetherketoneketones, and syndiotactic polystyrenes;

(b) about 30 to about 70 weight percent of surface-coated calcium fluoride;

(c) about 2 to about 15 weight percent of at least one polymeric toughening agent or about 5 to about 40 weight percent of at least one liquid crystalline polymer, or a mixture of these; and

(d) 0 to about 30 weight percent of at least one fibrous filler;

the above stated percentages being based on the total weight of the composition.

10. The composition of claim 9 wherein the fibrous filler is present in from 5 to about 30 weight percent, based on the total weight of the composition.

11. The composition of claim 9 wherein the thermoplastic polymer is at least one thermoplastic polyester.

12. The composition of claim 9 wherein the polymeric toughening agent is a copolymer of ethylene, butyl acrylate, and glycidyl methacrylate and/or a copolymer of ethylene, ethyl acrylate, and glycidyl methacrylate.

13. The composition of claim 9 wherein the polymeric toughening agent is a core-shell acrylic polymer.

17. An article made from the composition of claim 9.