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:
Oct. 31, 1978
Filed:
Feb. 02, 1977
Other;
Abstract
A method is provided for producing a fine granular concentrate of fire-retarding, foam-forming solids for addition to host material including plastics, paints, coating compositions and the like by mixing particles of solid fire-retarding additives of particle size less than about 5.mu.m with a polymeric material wherein the particles are surrounded and coated by said polymeric material, said polymeric material being compatible with or the same as the host material to which the coated particles are subsequently added to confer fire-retarding and foam-forming properties thereto. The steps include drying said polymeric-particle mixture, comminuting said polymeric-particle mixture to a granular product of less than about 50.mu.m, and repeating the coating procedure at least one more time on said granular product by mixing said granular product with polymeric material, followed by drying and comminuting said granular-polymeric mixture to provide a granular concentrate having a size of less than about 50.mu.m with an outer layer of said polymeric material, said polymeric material in at least the outer layer of granular concentrate being characterized by being capable of splitting off nitrogen and/or water under pyrolitic conditions.