Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-02-13
1990-09-04
Woo, Jay H.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
15624423, 15624427, 1563073, 264136, 264137, 264257, 264258, 26433111, 26433118, 525282, 525524, B29C 4320
Patent
active
049541951
ABSTRACT:
A process for increasing the damage tolerance in thermoset composites without loss of processibility or mechanical properties of the thermoset, by controlled solubility of a thermoplastic filler in the base thermoset. The process includes mixing spherical particles of a selected thermoplastic, such as polyimide, of particle size ranging from about 10 to 80 microns, with a hot thermoset resin, such as a bismaleimide, to form a uniform dispersion of the resin mixture, employing about 5 to about 40% of the thermoplastic by weight of the mixture of the two resins. The particles of thermoplastic are non-agglomerating and insoluble in the resin mixture. The hot resin dispersion is then applied to fiber reinforcement, such as carbon fiber tapes, to form pre-pregs. Upon curing the thermoset at elevated temperature, the thermoplastic particles dissolve in the thermoset resin, forming a composite with no definable boundary interfaces between the thermoplastic and thermosetting resins.
REFERENCES:
patent: 3920768 (1975-11-01), Kwiatkowski
patent: 4144284 (1979-03-01), Semanaz et al.
patent: 4212959 (1980-07-01), Fukami et al.
patent: 4468497 (1984-08-01), Street et al.
patent: 4562231 (1985-12-01), Dean
patent: 4691025 (1987-09-01), Domeier et al.
patent: 4749760 (1988-06-01), Wang
patent: 4757120 (1988-07-01), Bristowe et al.
patent: 4766179 (1988-08-01), DeKoning
patent: 4834933 (1989-05-01), Gardner
"The Toughening Effects of PBI in a BMI Matrix Resin," M. T. Blair et al, 33rd International SAMPE Symposium, Mar. 7-10, 1988, pp. 524-537.
"Semi-IPN Matrix Systems for Composite Aircraft Primary Structures", G. R. Almen et al, 33rd International SAMPE Symposium, Mar. 7-10, 1988, pp. 979-989.
Durkin II Jeremiah F.
Geldin Max
Lockheed Corporation
Woo Jay H.
LandOfFree
Production of thermoset composites containing thermoplastic fill does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of thermoset composites containing thermoplastic fill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of thermoset composites containing thermoplastic fill will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-439607