Back to results
US 7,022,265 B2Granted
Polyamide resin compositions with electromagnetic interference shielding properties and articles formed therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul P. Cheng, Yuji Saga
Life of this patent
Estimating the term…
Abstract
Polyamide resin compositions suitable for molded articles comprising polyamide, thermoplastic polyphenol, and of carbon fiber are disclosed. These may optionally include aramid fiber and zinc oxide whisker. Such compositions show remarkable shielding performance when subjected to electromagnetic fields, and with outstanding control of warpage and toughness.
Claims13
An electromagnetic interference resistant polyamide resin composition comprising:
- (a) 100 parts by weight of a polyamide;
- (b) about 5 to about 50 parts by weight of a thermoplastic polyphenol, where the total amount of (a)+(b) is about 35 to about 90 weight percent based on the total weight of the composition;
- (c) carbon fibers that are present in about 5 to about 60 weight percent based on the total weight of the composition;
- and
- (d) zinc oxide whiskers that are present in about 1 to about 10 weight percent, based on the total weight of the composition.
2 more elements
An electromagnetic interference resistant polyamide resin composition comprising:
- (a) 100 parts by weight of a polyamide;
- (b) about 5 to about 50 parts by weight of a thermoplastic polyphenol, where the total amount of (a)+(b) is about 35 to about 90 weight percent based on the total weight of the composition;
- (c) carbon fibers that are present in about 5 to about 60 weight percent based on the total weight of the composition;
- and
- (d) aramid fibers that are present in about 0.5 about 10 weight percent, based on the total weight of the composition.
2 more elements
Dependencies are inferred from the claim text.