Polymer composition with metal coated carbon flakes

• US 6,503,964 B2
• Filed: 01/10/2001
• Issued: 01/07/2003
• Est. Priority Date: 01/11/2000
• Status: Expired due to Term

• Current Assignee: Cool Options, Inc.
• Original Assignee: Cool Options, Inc.
• Inventors: Smith, Lyle James, Sagal, Mikhail, McCullough, Kevin A., Miller, James D.
• Primary Examiner(s): Yoon, Tae H.
• Application Number:
  US09/757,499
• Publication Number:
  US 20010025075A1
• Time in Patent Office: 727 Days
• Field of Search: 523/215, 523/137, 524/495, 427/217, 428/403, 428/570
• US Class Current: 523/137
• CPC Class Codes: C08K 9/02 Ingredients treated with inorganic substances
• CPC Class Codes: C09K 19/52 characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
• CPC Class Codes: Y10T 428/12181 Composite powder [e.g., coated, etc.]
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

A thermally conductive and electromagnetic interference and radio frequency reflective polymer composition and a method for creating the same is disclosed. Thermally conductive filler material is coated with a thermally conductive and electromagnetic interference and radio frequency reflective coating material and mixed with a base polymer matrix. The mixture is molded into the desired shape. The electromagnetic interference and radio frequency reflective coating material prevents the absorption and transfer of EMI and RF waves through the filler material thus resulting in an EMI and RF reflective composition.

Claims

1. A method of molding a composition, comprising the steps of:

providing a base polymer matrix material;

providing a thermally conductive and electromagnetic interference and radio frequency absorptive carbon flake filler material;

coating said filler material with a coating material;

mixing said filler material with said base matrix into a mixture; and

molding said mixture into a net-shape molded article.

2. The method of claim 1, wherein said step of providing a base matrix material is providing a liquid crystal polymer.

3. The method of claim 1, wherein said step of coating is coating with a thermally conductive and electromagnetic interference and radio frequency reflective material selected from the group consisting of:

aluminum, copper and nickel.

4. A method of molding a thermally conductive electrically insulative composition, comprising the steps of:

providing a base polymer matrix material;

providing a thermally conductive carbon flake filler material;

coating said filler material with an electromagnetic interference and radio frequency reflective material, producing a coated filler material;

mixing said filler material with said base matrix into a mixture; and

net shape molding said mixture of said coated filler material and said base matrix.

5. The method of claim 4, wherein said step of providing a base matrix material is providing a liquid crystal polymer.

6. The method of claim 4, wherein said step of coating is coating