Structured kaolin agglomerates and methods of making the same

Details Structured kaolin agglomerates and methods of making the same Structured kaolin agglomerates and methods of making the same

1981-07-27

1982-08-24

Poer, James

Compositions: ceramic

Ceramic compositions

Clay containing

106308N, C09C 308

Patent

active

043461786

ABSTRACT:
Kaolin (clay) platelets in water are flocculated with an acid (pH 3.0) to form "structured agglomerates", which are stabilized by reacting with an urea-formaldehyde prepolymer. The urea-formaldehyde prepolymer forms polymeric agglomerated particles when it comes in contact with the catalytic, acidic kaolin "structured agglomerates." The urea-formaldehyde polymeric agglomerated particles cause adhesion or stabilizing of the structured kaolin agglomerates to form a three-dimensional network of "open structure" with a large number of microvoids (pores). The urea-formaldehyde polymer in the stabilized product varies from 5 to 95% by weight based on the total weight of the final product.
The size of the primary particles of the urea-formaldehyde polymer is from 0.1 to 0.7.mu. (micron). The size of the kaolin platelets is from 0.1 to 10.mu. (microns). The structured agglomerates of kaolin-urea-formaldehyde possess a size ranging from 0.25 to 40.mu. (microns).

REFERENCES:
patent: 3912532 (1975-10-01), Simone

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