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US 4,071,501 AGranted
Water soluble adduct of hydroxymethyl phosphorous compound and ammonia or amine compound and method of preparation
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsArmand B. Pepperman, Jr., Donald J. Daigle, Sidney L. Vail
Life of this patent
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Abstract
Soluble adduct polymers were allowed to react with phenol, alkyl substituted phenols or halogen substituted phenols which contain one or more hydrogens ortho or para to the phenolic hydroxyl group to (a) prepare flame resistant polymers and (b) prepare flame-, glow-, wrinkle- and shrink-resistant woven and knit textiles which contain 25% or more cellulosic fibers.
Claims2
A process for preparing a water soluble adduct polymer comprising:
- a. reacting a hydroxymethyl phosphorus compound selected from the group consisting of tris(hydroxymethyl)phosphine and tetrakis (hydroxymethyl) phosphonium hydroxide with a nitrogenous compound selected from the group consisting of ammonia, hexamethylenetetramine, ethylenediamine and 1,6-hexamethylene diamine at a mole ratio of 1:4 to 4:1 of amine to phosphorus compound to form an insoluble polymeric precipitate;
- and
- b. dissolving the precipitate from (a) in the presence of formaldehyde and an inorganic or organic acid with a mole ratio of 1:4 to 4:1 of formaldehyde to phosphorus contained in the precipitate and a 1:10 to 2:1 ratio of acid to phosphorus contained in the precipitate.
Dependencies are inferred from the claim text.