Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1981-05-15
1982-10-19
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524494, 524512, 524539, 524541, C08L 6124
Patent
active
043551289
ABSTRACT:
Economical durable molded articles are prepared by mixing a hardenable resin system, gypsum filler and glass fibers, molding the desired article from the mixture, and hardening the molded article by heat or by the use of a hardening agent. The resin system comprises at least one hardenable resin, for example urea formaldehyde resin, and can include a second hardenable resin, for example polyvinyl acetate resin. The gypsum filler may be an economical by-product of phosphate refining. The glass fibers may be an economical by-product from the manufacture of bulk filter media. The constituents of the resin system and their proportions are chosen to impart desired surface finishes to the molded article. Coloring agents and other additives may also be added to affect the surface finish and appearance.
REFERENCES:
patent: 2966473 (1960-12-01), Biefeld et al.
patent: 3786041 (1974-01-01), Talsma
patent: 3878142 (1975-04-01), Tisza
patent: 3975320 (1976-08-01), Lane et al.
patent: 4085246 (1978-04-01), Buser et al.
patent: 4159301 (1979-06-01), Buser et al.
Facet Enterprises Inc.
Jacobs Lewis T.
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