Process for obtaining reinforced cellular materials based on uns

Details Process for obtaining reinforced cellular materials based on uns Process for obtaining reinforced cellular materials based on uns

1982-05-20

1984-04-24

Anderson, Philip E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

264 453, 264 467, 264 50, 264 53, 264257, 2643286, 264DIG5, 521 81, 521138, B29D 2700

Patent

active

044448325

ABSTRACT:
A process for obtaining cellular materials from unsaturated polyester resins reinforced with fillers having a density below 0.7 kg/lt by injecting a liquid foam, made from the resins by mechanical introduction of a gas therein into a closed mold, is described. The liquid foam, obtained from polyester resins including additives and optionally a reinforcement of synthetic, artificial, vegetable or mineral fibres having a length lower than 5 mm, and optionally containing a low boiling foaming agent, is injected voluminized and cross-linked in the hot or in the cold in a closed mold containing a reinforcing agent of synthetic, artificial, vegetable or mineral fibers as a monofilament mat, a cut fibre mat, a mono or bidirectional roving woven mat, rovings, fabrics.

REFERENCES:
patent: 3896060 (1975-07-01), Plunguian et al.
patent: 4026828 (1977-05-01), Smiley
patent: 4119583 (1978-10-01), Filip et al.
patent: 4148854 (1979-04-01), Cordts et al.
Kubiak, Richard S. and Robert C. Harper "The Development of Non-Urethane erials for the RIM Process", In 45th Annual Technical Conference, 1980, Reinforced Plastics/Composites Institute, The Society of the Plastics Industry, Inc., Section 22C, pp. 1-7.

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