Title: Process of preparing fire-retardant natural and synthetic fibers

Abstract: Disclosed are brominated azido fire-retardants having the formula (Br).sub.x --R--[(R').sub.n --A].sub.y where R is an organic radical; R' is selected from ##STR1## where R" is selected from alkylene, cycloalkylene, alkylene cycloalkylene, arylene, alkylene arylene, and the foregoing radicals with bromo substituents, and b is an integer from 1 to 10; A is selected from ##STR2## and --SO.sub.2 N.sub.3 where z is 0 or 1; x is at least 3; n is 0 or 1; and y is an integer from 1 to 100. Also disclosed is the process of preparing fire-retardant natural and synthetic fibers and films which comprises contacting the surface of said fiber or film with a brominated azido fire-retardant and initiating reaction of the fire-retardant with the fiber or film by heat or irradiation.

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Inventors: Chien, James C. W. (Amherst, MA, US)
Schappell, Frederick George (Newark, DE, US)

Application Number: 569251
Filing Date: 1975-04-18
Publication_date: 1977-02-22
Assignee: Hercules Incorporated (Wilmington, DE)
Primary Class(es): 427/595 8/181, 8/194, 427/394
Other Classes:
US Patent Ref:

3211713	Oct, 1965	Breslow	260/93.
3220985	Nov, 1965	Breslow	260/79.
3284421	Nov, 1966	Breslow	260/80.
3695821	Oct, 1972	Sakai et al.	8/2.

Other Refs:
Primary Examiner: Lusignan, Michael R.
Assistant Examiner:
Attorney: Staves; Marion C.