Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Woven fabric – Including a free metal or alloy constituent
Patent
1998-10-22
2000-06-06
Pezzuto, Helen L.
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Woven fabric
Including a free metal or alloy constituent
442173, 442180, 442233, 442234, 524571, B32B 0700
Patent
active
060718366
ABSTRACT:
An electrical substrate material is presented comprising a thermosetting matrix of polybutadiene or polyisoprene in an amount of about 15 to about 50 volume %; a fabric reinforcement in an amount of 0 to about 40 volume %; a particulate filler, preferably ceramic, in an amount of from 0 to about 60 volume %; microballoons in an amount from 0 to about 60 volume %; and optionally a flame retardant. A peroxide cure initiator and/or crosslinking agent may optionally be added. The presence of a very high surface area particulate filler, preferably fumed silica, is also preferred, in that its presence results in a prepreg which has very little tackiness and can therefore be easily handled by operators. This low tackiness feature allows for the use of conventional automated layup processing, including foil cladding, using one or more known roll laminators. While the prepreg of this invention is tack-free enough to be handled relatively easily by hand, it is also tacky enough to be tacked to itself using a roll laminator (e.g., nip roller) at room temperature. The composition of this invention is particularly well suited for making electrical circuit substrates for microwave and digital circuits, typically in the form of the thermosetting composition being laminated onto one or both opposed surfaces to a metal conductive foil such as copper.
REFERENCES:
patent: 3642687 (1972-02-01), Naarmann et al.
patent: 3644584 (1972-02-01), Fryd
patent: 3860672 (1975-01-01), Lagally
patent: 3919133 (1975-11-01), Dawans et al.
patent: 3940534 (1976-02-01), Fick et al.
patent: 4017436 (1977-04-01), Tabana et al.
patent: 4197377 (1980-04-01), Bohm et al.
patent: 4229550 (1980-10-01), Jones et al.
patent: 4241132 (1980-12-01), Pratt et al.
patent: 4268433 (1981-05-01), Sawatari et al.
patent: 4370448 (1983-01-01), Leland
patent: 4384066 (1983-05-01), O'Shea
patent: 4499240 (1985-02-01), Valentine
patent: 4554470 (1985-11-01), Jerson et al.
patent: 4587300 (1986-05-01), Valentine
patent: 4600745 (1986-07-01), Creighton
patent: 4704318 (1987-11-01), Saito et al.
patent: 4780507 (1988-10-01), Gaku et al.
patent: 4789708 (1988-12-01), Guzy
patent: 4820764 (1989-04-01), Guzy et al.
patent: 4904760 (1990-02-01), Gaku et al.
patent: 4997702 (1991-03-01), Gazit et al.
patent: 5223568 (1993-06-01), Landi et al.
patent: 5264065 (1993-11-01), Kohm
patent: 5354611 (1994-10-01), Arthur et al.
patent: 5358775 (1994-10-01), Horn, III
patent: 5374453 (1994-12-01), Swei et al.
patent: 5506049 (1996-04-01), Swei et al.
patent: 5552210 (1996-09-01), Horn, III et al.
"High Vinyl 1-2 Liquid Polybutadiene-Ricon Molding Compounds CCS-110" Feb. 1, 1980 Colorado Chemical Spec.
Colorado Chemical Brochure--"Ricon Product Bulletin", Aug. 20, 1985 High Vinyl 1-2 Liquid Polybutadiene.
N. Sawatari, I. Watanabe, H. Okuyama and K. Murakawa, "A New Flame Retardant, 1,2-Polybutadiene Laminate", 1983 pp. 131-137.
Bruzzone et al., LaChimica E. L'Industria 47 (12) 1298-1302 (1965) "High-Temperature Thermal Cross-linking of Cistatic Polybutadiene".
McCreedy et al., Polymer 20(4)(1979) "Effect of Thermal Crosslinking on Decomposition of Polybutadiene".
Barth et al., Modern Plastics pp. 142-148, *(Nov. 1970) "Fast-Curing Polybutadiene Thermosetting Resins".
United Kingdom Search Report dated Sep. 17, 1997.
Hand Doris I.
St. Lawrence Michael E.
Pezzuto Helen L.
World Properties, Inc.
LandOfFree
Polybutadiene and polyisoprene thermosetting compositions and me does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polybutadiene and polyisoprene thermosetting compositions and me, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polybutadiene and polyisoprene thermosetting compositions and me will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2213373