Method of shaping articles using shaping surfaces having release

Details Method of shaping articles using shaping surfaces having release Method of shaping articles using shaping surfaces having release

1983-05-09

1985-07-30

Godici, Nicholas P.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

106 3822, 156 622, 156289, 164 15, 164138, 264338, 427133, 427135, B22C 300, B22C 902, B29J 500

Patent

active

045320969

ABSTRACT:
Method of forming or shaping a resin-bound mass (e.g., core-making or mold-making pattern or core box, particle board, etc.) in or from shaping means having shaping surfaces and releasing the shaped resin-bond mass from the shaping surfaces, which comprises coating the shaping surfaces of the shaping means with an improved, substantially stable, alcoholic dispersion or solution of a release coating suitable for repeated use, heating the coated shaping surfaces of the shaping means for sufficient time to convert the coating thereon to a stable, cured, abrasive-resistant release coating, placing a curable resin-bound mass of solids to be shaped against the release-coated shaping surfaces, curing the resin-bound mass, and separating the cured resin-bound mass from contact with the release coated shaping surfaces. The coating composition comprises a substantially stable alcoholic dispersion or solution of a substantially pure silanol of the formula RSi(OH).sub.3 or partial condensate of one or more silanols of the formula RSi(OH).sub.3, wherein R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical.

REFERENCES:
patent: 2666685 (1954-01-01), Hommel et al.
patent: 2884432 (1959-04-01), Gordon
patent: 3401735 (1968-09-01), Pursall
patent: 3684756 (1972-08-01), Brooks
patent: 3986997 (1976-10-01), Clark

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