THERMOTROPIC LIQUID CRYSTALLINE POLYMER REINFORCED WITH POLYIMIDE SIZED CARBON FIBERS
Assignee
DEUTSCHE BANK AG, NEW YORK BRANCH, AS COLLATERAL AGENT
Filed
Jan 14, 1983
Granted
Mar 28, 1995
Location
STATEN ISLAND NY US
Abstract
A thermotropic liquid crystalline polymer matrix having sized carbon fibers incorporated therein for reinforcement. The carbon fibers are coated on their surface with a sizing composition comprising a rigid polyimide coating which is derived from the reaction of at least one aromatic diamine, at least one dianhydride, and at least one aromatic tetracarboxylic acid diester in which the carboxylic acid groups and ester groups are ortho disposed. By the use of appropriate amounts of heat and pressure, multifilamentary bundles of carbon fibers are readily impregnated with thermotropic liquid crystalline polymer to form a prepreg having a uniform distribution of carbon fiber throughout.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jul 21, 1983
Rescinded
Feb 25, 1994
Duration
10 years, 7 months
Inventor
- 1ROBERT EDELMAN
Record Details
- Patent number
- US 5401779
- Application
- 06458076
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records