Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1994-03-23
1999-05-04
Chen, Vivian
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428482, 428483, 264101, 264226, 264255, 264257, 264258, 264511, 264513, 264516, 156382, 156500, 523500, 4254051, B32B 2708, B32B 2712, B32B 2720, B32B 2736
Patent
active
059003111
ABSTRACT:
Fiber-reinforced thermosetting polyester composites containing in excess of 30 wt %, based on the weight of the composite, reinforcing fiber, are made by a vacuum-assisted transfer molding technique from a 1-phase composite matrix precursor comprising a polyester, a reactive monomer, and a low-profile additive. The polyester has a molecular weight/double bond factor of between about 150 and 190, styrene is a preferred reactive monomer, and a preferred low-profile additive is a thermoplastic polymer with a weight average molecular weight in excess of 3,000 and which is miscible in the polyester and reactive monomer. The polyester composite is formed by coating the surface of a mold with a gel coat; applying a skin laminate over the partially cured gel coat; applying a fiber reinforcement to the skin laminate; closing the mold; and injecting the 1-phase matrix precursor while the mold is under vacuum. The hallmark of these composites is their combination of physical strength as measured by one or more standard strength tests for composites and smooth surface profile as compared to the thermosetting polyester composites made from a typical hand lay-up or spray up process, or a conventional vacuum-assisted transfer molding process.
REFERENCES:
patent: 2913036 (1959-11-01), Smith
patent: 3701748 (1972-10-01), Kroekel
patent: 3753843 (1973-08-01), Hutchison
patent: 4132755 (1979-01-01), Johnson
patent: 4312829 (1982-01-01), Fourcher
patent: 4525498 (1985-06-01), Atkins et al.
patent: 4902215 (1990-02-01), Seemann, III
patent: 5009821 (1991-04-01), Weaver
patent: 5052906 (1991-10-01), Seemann
patent: 5082878 (1992-01-01), Bansleben et al.
patent: 5104983 (1992-04-01), Stock et al.
patent: 5162401 (1992-11-01), Ross et al.
patent: 5202366 (1993-04-01), Reid et al.
patent: 5213747 (1993-05-01), Lippert
patent: 5256709 (1993-10-01), Ross et al.
patent: 5305568 (1994-04-01), Beckerman
patent: 5376721 (1994-12-01), McGarry et al.
patent: 5386963 (1995-02-01), Nasvik
patent: 5399621 (1995-03-01), Kohlhammer
patent: 5401803 (1995-03-01), Rex
D.R. Paul et al., Eds., Polymer Blends, vol. II, Chapter 23 by K. E. Atkins, New York Academic Press, pp. 391 et seq. (1978).
Campanella David A.
Hsu Chih-Pin G.
Chen Vivian
Cook Composites and Polymers Co.
LandOfFree
Thermosetting polyester composites prepared via vacuum-assisted does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermosetting polyester composites prepared via vacuum-assisted , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermosetting polyester composites prepared via vacuum-assisted will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1869044