Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1987-06-08
1989-03-07
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
264257, 2643286, 2643287, 26433119, B29C 4304, B29C 4500, B29C 4534
Patent
active
048104442
ABSTRACT:
A process for the preparation of molded high strength composites comprising fibrous reinforcing material impregnated with a reaction injection molded polyisocyanurate resin. The process comprises first evacuating a mold containing the fibrous reinforcing material said mold equipped with means for accepting an overflow volume of the resin. The mold system is pressurized prior to gelation causing the overflow volume to be forced into a final volume. The molded composites have a high flexural moduli, good physical properties, low void content and smooth surface.
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Alberino Louis M.
Carleton Peter S.
Waszeciak Douglas P.
Durkin II Jeremiah F.
Lowe James
Rose James S.
The Dow Chemical Company
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