Particulate-containing foamed plastic

Details Particulate-containing foamed plastic Particulate-containing foamed plastic

1980-08-04

1981-12-22

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

264DIG83, 366159, 366173, 366177, 422135, 425 4R, 425817R, B01F 1502, B01F 1504, B01J 1400

Patent

active

043070620

ABSTRACT:
A method and apparatus for incorporating particulate material in reactive resin mixes produced by the RIM method in the molding of foamed or unfoamed plastic articles, wherein the particulate material is introduced into the resin mix in a manner which substantially eliminates the severe abrasive effect such particulate material produces under conditions existing in prior methods due to flow through the various passages of the mixing head. The particulate material may constitute reinforcement for a plastic article, in which case short lengths of glass, carbon, graphite or other mineral or metal fibers and the like may be used. Alternatively, granular particulates such as carbon black, metal or mineral oxides, pigments, etc. may be incorporated for coloring the product, or increasing its resistance to actinic rays, or for imparting increased rigidity to the molded product, etc.

REFERENCES:
patent: 3220801 (1965-11-01), Rill, Jr. et al.
patent: 3232709 (1966-02-01), Cole
patent: 3353918 (1967-11-01), Perrin
patent: 3617029 (1971-11-01), Breer
patent: 3788337 (1974-01-01), Breer
patent: 3857550 (1974-12-01), Knipp
patent: 3964731 (1976-06-01), Ernst
patent: 4082512 (1978-04-01), Wingard et al.
patent: 4099919 (1978-07-01), Leidal
patent: 4106115 (1978-08-01), Takahashi et al.

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