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Preformed compositions in shaped form comprising polymer blends

A pre-formed, composite technology that can be used in other chemical processes, chemical instruments and methods to solve problems such as added labor requirements, time-consuming, etc.

Inactive Publication Date: 2010-05-26
PRC DE SOTO INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

this process is time consuming and can add labor requirements to active aircraft with many access doors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1 provides a conductive preform composition in molded form that exhibits EMI / RFI shielding effectiveness. The following materials were mixed in proportions according to Table 1 to provide a conductive base composition: PERMAPOL P 3.1 polythioether polymer from PRC-DeSoto International, Inc., THIOPLAST G4 from Akcros Chemicals (New Brunswick, New Jersey) Polysulfide polymer, phenolic resin adhesion promoter from PRC-DeSoto International, Inc. and HB-40 modified polyphenyl plasticizer from Solutia, Inc. (St. Louis, Missouri). Using a high shear grinding blade (Cowls blade), the following materials were added one by one and blended until inserted: calcium chromate corrosion inhibitor (Wayne Pigment Corp., Milwaukee, Wisconsin), hydrophobic fumed silica (R202, obtained from Aerosil / Degussa, Diamond Bar, California), Ni fibers (30 μm in diameter, 500 μm in length; available from Intramicron, Birmingham, Alabama), Ni-coated graphite (I) (60% Ni-coated graphite; availa...

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Abstract

Preformed compositions in shaped form comprising polymer blends, and the use of these preformed compositions in shaped form to seal apertures are disclosed. In certain embodiments, the preformed compositions are electrically conductive and are capable of shielding EMI / RFI radiation. The polymer blend includes a polysulfide component and a polythioether component.

Description

field of invention [0001] The present invention relates to a preformed composition in shaped form and to the use of the preformed composition for sealing holes. Background of the invention [0002] Electromagnetic interference can be defined as unwanted conducted or radiated electrical disturbances from electrical or electronic sources (including transients), which may interfere with the operation of other electrical or electronic instruments. Such interference can occur at frequencies throughout the electromagnetic spectrum. Radio Frequency Interference ("RFI") is often used interchangeably with Electromagnetic Interference ("EMI"), although RFI more properly refers to the radio frequency portion of the electromagnetic spectrum generally defined from 10 kilohertz (KHz) to 100 gigahertz (GHz). [0003] Electronic equipment is typically housed in an enclosure. The enclosure not only serves as a physical barrier to protect the device from environmental damage, but can also b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L81/04
CPCC09K3/1012C08L81/02C08L81/04C08L81/00C08L81/06
Inventor M·A·科斯曼A·K·巴拉德埃里斯
Owner PRC DE SOTO INT INC