Robert J Craig

US Patent:

42062624, Jun 3, 1980

Filed:

Jan 16, 1978

Appl. No.:

5/869407

Inventors:

Robert S. Craig - Hoffman Estates IL

Assignee:

Acme Resin Corporation - Forest Park IL

International Classification:

B32B 1904
B32B 2714
B32B 2747

US Classification:

428404

Abstract:

A resin-coated sand comprising: (a) particles of sand coated with from about 1% to about 8%, by weight of the sand, of a novolak resin consisting essentially of about 50% to about 98% of a phenol-formaldehyde novolak resin and about 2% to about 50% of a catechol-formaldehyde novolak resin; and, (b) a curing agent. The sands are especially useful for forming foundry cores and molds.

US Patent:

42810906, Jul 28, 1981

Filed:

Nov 1, 1979

Appl. No.:

6/090388

Inventors:

Robert S. Craig - Hoffman Estates IL

Assignee:

Acme Resin Corporation - Forest Park IL

International Classification:

C08L 6112

US Classification:

525501

Abstract:

A resin-coated sand comprising: (a) particles of sand coated with from about 1% to about 8%, by weight of the sand, of a novolak resin consisting essentially of about 50% to about 98% of a phenol-formaldehyde novolak resin and about 2% to about 50% of a catechol-formaldehyde novolak resin; and, (b) a curing agent. The sands are especially useful for forming foundry cores and molds.

US Patent:

43335136, Jun 8, 1982

Filed:

Mar 5, 1981

Appl. No.:

6/240641

Inventors:

Robert S. Craig - Hoffman Estates IL

Assignee:

Acme Resin Corporation - Englewood Cliffs NJ

International Classification:

B22C 122

US Classification:

164526

Abstract:

A resin-coated sand comprising: (a) particles of sand coated with from about 1% to about 8%, by weight of the sand, of a novolak resin consisting essentially of about 50% to about 98% of a phenol-formaldehyde novolak resin and about 2% to about 50% of a catechol-formaldehyde novolak resin; and, (b) a curing agent. The sands are especially useful for forming foundry cores and molds.

US Patent:

41139160, Sep 12, 1978

Filed:

Jun 9, 1976

Appl. No.:

5/694426

Inventors:

Robert Simpson Craig - Hoffman Estates IL

Assignee:

Acme Resin Corporation - Forest Park IL

International Classification:

B32B 516

US Classification:

428404

Abstract:

A resin coated sand comprising: (a) particles of sand coated with from about 1% to about 8% by weight sand of phenol-formaldehyde morolak resin; (b) a curing agent; and (c) from about 2% to about 50% by weight of phenol-formaldehyde morolak resin of an epoxy and/or phenoxy resin. The resin coated sands of the present invention provide improved thermal shock resistance without creating smoke and odor problems. In addition, the resin coated sands of the invention can be formed into foundry articles that possess good tensile strength.