Method of manufacturing a bonded particulate article by reacting a hydrolyzed amylaceous product and a heterocyclic compound
AssigneeAmerican Cyanamid Company
InventorsAlbert P. Paul, Richard A. Szarz, Roger J. Card
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Abstract
Disclosed herein is a method of manufacturing a bonded particulate article by admixing particulate material with a binder system, the binder system being formed by admixing a polyol comprising a water soluble amylaceous hydrolyzate with a heterocyclic compound comprising the reaction product of glyoxal, urea, and formaldehyde, alone, or in further combination with ethylene glycol, with a solvent, and with an acid effective to control the rate of cross-linking between said polyol and said heterocyclic compound; forming the admixture in a shape and curing the shape to a bonded article.
Claims9
A curable composition adapted to produce a shaped bonded particulate article, said composition comprising
- (i) a particulate material;
- and, as a binder therefor,
- (ii) a polyol comprising a hydrolyzed, gelatinized amylaceous material;
- (iii) a crosslinker for said polyol (ii) comprising the reaction product of glyoxal, urea and formaldehyde, alone, on in further combination with ethylene glycol;
- (iv) an acid catalyst;
- and
- (v) a solvent for the binder.
A bonded particulate article manufactured by
- (i) admixing 80%-99% of particulate material with 1%-20% of binder system, the binder system being formed by admixing 20-55% of saccharide material, 3%-60% of crosslinker comprising the reaction product of glyoxal, urea and formaldehyde, 0.2%-10% of an acid, and 15%-85% of solvent by weight;
- (ii) forming the admixture into a shape;
- and
- (iii) curing.
Dependencies are inferred from the claim text.