Polyphenylene ether resin compositions for EMI electromagnetic interference shielding
First Claim
1. A thermoplastic molding composition which comprises:
- (a) a polyphenylene ether-styrene resin composition; and
(b) a conductive material selected from the group consisting of aluminum flakes, a combination of aluminum flakes with carbon fibers or conductive carbon black, a combination of carbon fibers and conductive carbon black, and carbon fibers, in an amount sufficient to render the composition when molded shielding against electromagnetic interference.
1 Assignment
0 Petitions
Accused Products
Abstract
Compositions or composites comprising a polyphenylene ether-styrene resin blend or composition are disclosed which have electromagnetic shielding properties so that when the compositions are used for electronic equipment components or housings they provide shielding against electromagnetic interference referred to as EMI. The composites eliminate the secondary treatments which have been used heretofore to provide these shielding properties, such as the application of electrically conductive silver, nickel, copper and graphite coatings, or the use of metal screens. The novel compositions of a polyphenylene ether-styrene blend contain as a conductive material, which attenuates the EMI, aluminum flakes, or a combination of aluminum flakes with carbon fibers or with a highly conductive carbon black or a combination of carbon fibers with conductive carbon black, or carbon fibers per se.
-
Citations
20 Claims
-
1. A thermoplastic molding composition which comprises:
-
(a) a polyphenylene ether-styrene resin composition; and (b) a conductive material selected from the group consisting of aluminum flakes, a combination of aluminum flakes with carbon fibers or conductive carbon black, a combination of carbon fibers and conductive carbon black, and carbon fibers, in an amount sufficient to render the composition when molded shielding against electromagnetic interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification