Tetrakis-hydroxymethyl-phosphonium sulphate precondensate with urea - is used as flame retardant for cellulose-contg. textile (NL 12.9.77)

Compositions retardatrices de flamme pour des matieres textiles

  • Inventors:
  • Assignees: American Cyanamid Co
  • Publication Date: October 07, 1977
  • Publication Number: FR-2343796-A1


Flame retardant for textiles contg. cellulose consists of an aq. soln. of a condensate (I) of tetrakis(hydroxymethyl)phosphonium sulphate (II) and urea. (I) pref. contains 4.0-9.0 esp. 5-7.5 (wt.)pts. (II)/pt. urea and the soln. contains 8.0-10.0% P. The use of the sulphate instead of the chloride avoids the possibility of the formation of bis(chloromethyl)ether, which is very toxic. The use of the precondensate of (II) and urea reduces the amt. of HCHO, which is partly eliminated during drying. In an example, (I) was prepd. by reacting 1.32 mole (II) and 1.65 mole urea in aq. soln., followed by treatment with dil. H peroxide soln. The (II)/urea wt. ratio of (I) was 5.4:1.




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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    EP-0076138-A2April 06, 1983Albright & Wilson LimitedMatériaux textiles ininflammables
    EP-0076138-A3January 11, 1984Albright & Wilson LimitedFlameproofing textiles
    US-4494951-AJanuary 22, 1985Albright & Wilson LimitedFlameproofing textiles