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US 3,953,165 AGranted
Flameproofing resins for organic textiles from adduct polymers
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsArmand B. Pepperman, Jr., Donald J. Daigle, Sidney L. Vail
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Abstract
Hydroxymethylphosphine-ammonia and similar polymers, solubilized by hydroxymethylphosphonium salts and formaldehyde, were allowed to react with nitrogenous compounds such as urea, trimethylolmelamine and ammonia 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.
Claims4
A process for flameproofing organic textiles, comprising:
- a. reacting a hydroxymethyl phosphonium compound with ammonia or an amine to form an insoluble adduct polymer;
- b. mixing said polymer with a formaldehyde solution and a hydroxymethyl phosphonium compound at a mole ratio of formaldehyde to polymer phosphorus of from 1:4 to 4:1 and at a mole ratio of phosphonium compound to polymer phosphorus of from 1:10 to 2:1, thereby dissolving said polymer;
- and
- c. reacting in contact with an organic textile said dissolved polymer and a nitrogenous compound containing at least two members of the group consisting of hydrogen atoms or methylol radicals attached to a trivalent atom.
1 more element
Dependencies are inferred from the claim text.