INTRINSICALLY CONDUCTIVE THERMOPLASTIC COMPOSITION AND COMPOUNDING PROCESSING FOR MAKING CONDUCTIVE FIBER

• US 20080139065A1
• Filed: 12/11/2006
• Published: 06/12/2008
• Est. Priority Date: 12/11/2006
• Status: Abandoned Application

• Current Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Liu, Bo, Lucco, Lowrence D., Amarasekera, Jayantha
• Application Number:
  US11/609,147
• Publication Number:
  US 20080139065A1
• Time in Patent Office: Days
• US Class Current: 442/189
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• 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: D01F 1/09 for making electroconductive or anti-static filaments
• CPC Class Codes: D01F 6/62 from polyesters
• CPC Class Codes: D01F 6/92 of polyesters
• CPC Class Codes: Y10T 428/2918 including free carbon or carbide or therewith [not as steel]
• CPC Class Codes: Y10T 428/298 Physical dimension
• CPC Class Codes: Y10T 442/3065 Including strand which is of specific structural definition
• CPC Class Codes: Y10T 442/696 Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]

Abstract

A conductive thermoplastic composition capable of forming conductive fibers including monofilaments, methods of making these compositions, and fibers including these compositions. The conductive thermoplastic compositions may be formed using any method capable of forming the compositions into fibers. The fibers are substantially smooth and/or are capable of being woven into fabrics or other articles to provide conductive properties to the fabric or article. These fibers provide effective static charge dissipation that may be imparted into applications such conveying belts or protective clothing for clean room operation.

Claims

1. A thermoplastic composition, comprising:

from 60 to 99% by weight of an organic polymer; and

from 0.5 to 40% by weight of a conductive filler;

wherein the thermoplastic composition is capable of forming a fiber having an average diameter with a standard deviation of 0.02 mm or less along a length of the fiber.

2. The thermoplastic composition of claim 1, wherein the organic polymer is an amorphous polymer selected from polycarbonates, polyethersulfones, polysulfonates, polyetherimides, poly(p-phenylene oxide);

polyamideimides, atactic polystyrene, polyarylsulfones, polyvinyl chlorides, or a combination comprising at least one of the foregoing amorphous polymers.

3. The thermoplastic composition of claim 1, wherein the organic polymer is a semi-crystalline polymer selected from polyesters, polyamides, polyphthalamide;

polyphenylene sulfides;

polyether etherketones;

polyetherketones;

polyether ketone ketones, liquid crystal polymers, polyimides, polyacetals, syndiotactic polystyrene, polyacrylics, polyarylates, polytetrafluoroethylenes;

polysulfonates;

polyvinyl alcohols, polysulfonamides, polysilazanes, polyphosphazenes, polyureas, or a combination comprising at least one of the foregoing semi-crystalline polymers.

4. The thermoplastic composition of claim 1, wherein the organic polymer is selected from polyetherimide, polybutylene terephthalate, and an permanent anti-static agent, such as polyamide/polyetheramide copolymer, or a combination comprising at least one of the foregoing organic polymers.

5. The thermoplastic composition of claim 4, wherein the organic polymer comprises a mixture of polybutylene terephthalate and a permanent anti-static agent and wherein the permanent anti-static agent is present in an amount from 1 to 40% by weight of the total weight of the thermoplastic composition.

6. The thermoplastic composition of claim 5, wherein the permanent anti-static agent comprises a polyamide/polyetheramide copolymer.

7. The thermoplastic composition of claim 5, wherein the permanent anti-static agent is present in an amount from 10 to 35% by weight of the total weight of the thermoplastic composition.

8. The thermoplastic composition of claim 1, wherein the conductive filler is selected from low-structure carbon black, single-wall carbon nanotubes, multi-wall nanotubes, vapor-grown carbon fibers, metal coated small carbon fibers, metal coated mineral particles with an average particle size smaller than 2 microns or a combination comprising at least one of the foregoing conductive fillers.

9. The thermoplastic composition of claim 8, wherein the conductive filler comprises low-structure carbon black having a surface area less than 300 m²/g.

10. The thermoplastic composition of claim 1, wherein the conductive filler is present in an amount of from 2 to 20% by weight of the total weight of the thermoplastic composition.

11. The thermoplastic composition of claim 1, further comprising an additive selected from a flame retardant agent, an antidrip agent, a heat stabilizer, a light stabilizer, an antioxidant, a plasticizer, an antistat agent, a mold release agent, a UV absorber, a lubricant, a pigment, a dye, a colorant, or combinations including one or more of the foregoing additives.

12-32. -32. (canceled)