Formaldehyde-free flame retardant treatment for cellulose-containing materials
AssigneesAkzo Nobel N.V., University of Georgia Research Foundation, Inc.
InventorsJeffrey K. Stowell, Edward D. Weil, William L. Coble, Charles Q. Yang
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Abstract
An aqueous finishing composition for cellulose-containing materials, comprising a hydroxyalkyl-functional organophosphorus flame retardant (which contains a substantially non-volatile component at the curing temperature) and a non-formaldehyde cross-linking agent (such as a polycarboxylic acid cross-linking agent), and the materials treated with such a composition. Optional ingredients for the aqueous finishing composition include a cross-linking catalyst and/or an inexpensive saturated alpha-hydroxy polycarboxylic acid such as citric acid (partial replacement of a more expensive preferred polycarboxylic acid will reduce finishing costs).
Claims19
An aqueous finishing composition for application to materials comprising cellulose, comprising a hydroxyalkyl-functional organophosphorus ester flame retardant and a non-formaldehyde cross-linking agent.
An aqueous finishing composition for application to a material comprising cellulose that comprises from about 1% to about 60%, by weight of the composition, of a non-volatile, hydroxyalkyl-functional organophosphorus ester flame retardant and from about 1% to about 40%, by weight of the composition, of a non-formaldehyde cross-linking agent.
Dependencies are inferred from the claim text.