Furan-phenolic resin coated sand for collapsible foundry molds

Details Furan-phenolic resin coated sand for collapsible foundry molds Furan-phenolic resin coated sand for collapsible foundry molds

1975-10-16

1977-09-27

Kendall, Ralph S.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428407, 260 56, 164 43, B22C 116

Patent

active

040513017

ABSTRACT:
A resin for coating sand and a resin-coated sand produced therefrom wherein the resin is prepared by incorporating furan into a phenolic novolak resin. In the preferred practice, the resin is produced by reaction of furfuryl alcohol with a phenolic compound at an acid pH to give a furfuryl-phenolic intermediate in a first step, and then, in a second step, reacting the furfuryl-phenolic intermediate with a lower aliphatic aldehyde to produce the resin. The resin-coated sands of the present invention provide unexpectedly improved shakeout and collapsibility characteristics in the shell process.

REFERENCES:
patent: 2453704 (1948-11-01), Dunlop et al.
patent: 2566851 (1951-09-01), Novotny et al.
patent: 2745816 (1956-05-01), Dijkstra
patent: 2834741 (1958-05-01), Bleuenstein
patent: 2861977 (1958-11-01), Baxter et al.
patent: 2970121 (1961-01-01), Schmittenberger
patent: 3299167 (1967-01-01), Knowlson et al.
patent: 3312650 (1967-04-01), Case et al.
patent: 3549584 (1970-12-01), Sekera
patent: 3725333 (1973-04-01), Adkins et al.
Brown et al., Furfurylated Novolak Resins, Industrial and Engineering Chemistry, 11-53, pp. 1675, 1676.

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