Resin binders for foundry molding sands

Details Resin binders for foundry molding sands Resin binders for foundry molding sands

B - Operations, Transporting

22

C

400/9043

B22C 1/22 (2006.01) C04B 26/04 (2006.01)

Patent

CA 1217591

ABSTRACT OF THE DISCLOSURE An aqueous dispersion of a copolymer comprising: (A) from 20 to 90 percent by weight of an unsaturated carboxylic acid of the formula Image where R1, R2, R3 are hydrogen, alkyl, or -(CH2)n COOM and M is a proton or an alkali metal or alkaline earth metal or an ammonium cation, and (B) from 10 to 80 percent of at least one other comonomer different from and copolymerizable with A; methods of making a ready-to-use foundry molding sand by mixing such a dispersion with sand; and such ready-to-use foundry molding sands.

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