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Primary Examiner: Czaja, Donald E.
Assistant Examiner: White, R. A.
Attorney: Awalt, Jr.; Thomas Y.

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Title: Method of preparing phosphorus-bromine containing fire retardant polyester fibers

Abstract: Fire retardant qualities are incorporated into polyester fibers by adding to the polymer, prior to spinning thereof into filaments, not more than 25 percent, based on the weight of the polymer, of a compound having the general formula: ##SPC1## Where R and R' are radicals selected from the group consisting of hydrogen, methyl, ethyl, aryl, and brominated aryl; where R" is a radical selected from the group consisting of alkyl, aryl, and brominated aryl; and where n is an integer of from 1 to about 100.

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Inventors: King, Henry L. (Cary, NC, US)

Application Number: 132369
Filing Date: 1971-04-08
Publication_date: 1976-01-13
Assignee: Monsanto Company (Decatur, AL)
Primary Class(es): 524/132 525/437, 525/534, 525/538, 528/287, 528/299, 528/308.5
Other Classes:
US Patent Ref:

2572076	Oct, 1951	Toy	260/61.
2682522	Jun, 1954	Coove, Jr. et al.	260/47.
3027349	Mar, 1962	Bahr et al.	260/45.
3053878	Sep, 1962	Friedman et al.	260/927.
3406224	Oct, 1968	McDonough	260/860.
3535300	Oct, 1970	Gable	260/29.
3583938	Jun, 1971	Okada et al.	260/45.
3584074	Jun, 1971	Shima et al.	260/857.

Other Refs: Other References: Hilado, Flammability Handbook For Plastics, 1969, pp. 82-86.