Plastic molded pieces having the appearance of a solid metallic

Details Plastic molded pieces having the appearance of a solid metallic Plastic molded pieces having the appearance of a solid metallic

1991-03-27

1993-01-05

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523218, 428 44, 428 49, 428325, 428327, 428328, 524439, 524440, 524441, C08J 932, C08K 308, B32B 314, B32B 516

Patent

active

051771241

ABSTRACT:
A utilitarian and/or decorative object and a method for forming the object fabricated mainly of a plastic material, such as polyester, having a metallic outer face which thereby imparts to this object the appearance and/or hand of a like object made entirely of metal. In this technique, a mixture of a liquid monomer, a curing agent therefor, a dispersion of metal particles and floatable particles are poured into a mold for forming the object. The metal particles are permitted to settle in the mold or the mold is centrifuged to cause the metal particles to migrate toward the outer or lower region of the piece and concentrate in this region before the monomer polymerizes and hardens to bind the particles. At the same time the floatable particles, such as glass or ceramic microspheres, rise to the inner or upper region of the piece and concentrate in this region before the monomer polymerizes and upon hardening of the monomer maintains the article in the desired shape without distortion from warping from uneven shrinkage. After removal from the mold, the outer face of the piece is polished and buffed to remove the fine plastic skin from the surface of the metal particles and to polish the exposed metal surface, whereby the resultant plastic piece simulates the appearance of a solid metal piece.

REFERENCES:
patent: 2145068 (1939-01-01), Batcheller
patent: 2168331 (1939-08-01), Fields et al.
patent: 2265226 (1941-11-01), Clewell et al.
patent: 2454910 (1948-11-01), Carr
patent: 2773287 (1956-12-01), Stout
patent: 3010158 (1961-11-01), Broderson
patent: 3219734 (1965-11-01), Mattin
patent: 3615963 (1971-10-01), Johansson et al.
patent: 3870775 (1975-03-01), Castro et al.
patent: 4521475 (1985-05-01), Riccio et al.
patent: 4568586 (1986-02-01), Gobrecht

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