Thermoplastic paste for the production of foundry mold cores and

Details Thermoplastic paste for the production of foundry mold cores and Thermoplastic paste for the production of foundry mold cores and

1989-02-10

1991-08-27

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 3827, 106 389, 501107, C04B 3568

Patent

active

050430149

ABSTRACT:
A thermoplastic paste for the production of foundry mold cores comprises, per 100 parts by weight of mineral filler comprised of fused silica, zircon and cristobalite, between 0.2 and 0.5 parts by weight of a mold release agent, and an organic binder formed by at least 15 to 20 parts by weight of polyethylene glycol having an average molecular weight between 1400 and 1600. A process suitable for the production of foundry mold cores from such a past comprises a shaping stage followed by a single firing cycle in four steps, namely,

REFERENCES:
patent: 4093017 (1978-06-01), Miller et al.
patent: 4190450 (1980-02-01), Robb et al.
patent: 4236568 (1980-12-01), Larson
patent: 4844148 (1989-07-01), Cuisin et al.

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