The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1982
Filed:
Jul. 27, 1981
Peter Economou, Millington, NJ (US);
Yara Engineering Corporation, Elizabeth, NJ (US);
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).