US 5,126,387 AGranted

Flame retardant compositions and method of use

AssigneeAlbright & Wilson Limited

InventorGeoffrey Hand

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Abstract

A flame retardant composition comprises at least one cyclic phosphonate ester and at least one phosphono amide. The ester and the amide are present in a ratio by weight of 0.1 to 2:1. A co-curing agent (e.g. urea, ethylene urea or an amino-triazine) may be included. The composition may also contain a non-rewetting agent and/or a softening or conditioning agent. The composition is used for the flame retardant treatment of a fabric by first impregnating the fabric with an aqueous solution of the composition and then heating the impregnated fabric at at least 100.degree. C. and under acid pH conditions.

Claims22

Dependent claims

A flame retardant composition comprising:

(i) at least one cyclic phosphonate ester, said cyclic phosphonate ester having the formula (I):
##STR4## wherein:
a is a whole number of from 0 to 2;
b is a whole number of from 0 to 2;
c is a whole number of from 1 to 3;
(a+b+c) is 3;
R and R.sup.1, which may be the same or different, are radicals selected from the group consisting of alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloxyalkoxy and aralkoxy, the alkyl portion of said radicals optionally including at least one hydroxyl radical but no halogen radicals and the aryl portion of said radicals optionally including at least one radical selected from the group consisting of chlorine, bromine and hydroxyl;
R.sup.2 is a radical selected from the group consisting of alkyl, hydroxyalkyl and aryl;
R.sup.3 is a radical selected from the group consisting of lower alkyl and hydroxyalkyl;
or said cyclic phosphonate ester having the formula (II) ##STR5## wherein:
d is a whole number of from 0 to 2;
e is a whole number of from 1 to 3;
(d+e) is 3;
R.sup.2 and R.sup.3 are as defined above;
R.sup.4 is a radical selected from the group consisting of alkyl, aryl, aralkyl and aryloxyalkyl, the aryl portion of said radicals optionally including at least one radical selected from the group consisting of bromine, chlorine and hydroxyl;
R.sup.5 is a tervalent hydrocarbyl radical, which may be aliphatic or aromatic and if aromatic, said radical R.sup.5 may optionally include a radical selected from the group consisting of bromine, chlorine, alkyl and hydroxyl;
(ii) at least one phosphono amide having the formula:
##STR6## wherein:
R.sup.6 is selected from the group consisting of hydrogen, alkyl radicals and alkenyl radicals;
R.sup.7 and R.sup.8 which may be the same or different, are organic radicals;
R.sup.9 is selected from the group consisting of hydrogen, halogen, alkyl radicals and radicals having the formula CH.sub.2 CONHCH.sub.2 OR.sup.6.
and
(iii) a co-curing agent for said component (ii), said co-curing agent being a material selected from the group consisting of urea, amino triazines, ethylene urea, acetylene diurea, etherified formaldehyde condensates of acetylene diurea and mixtures of any two or more of said materials, said composition having, in an aqueous solution, a pH value of 3 or less.

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Dependencies are inferred from the claim text.

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Abstract

A flame retardant composition comprising:

(i) at least one cyclic phosphonate ester, said cyclic phosphonate ester having the formula (I):
##STR4## wherein:
a is a whole number of from 0 to 2;
b is a whole number of from 0 to 2;
c is a whole number of from 1 to 3;
(a+b+c) is 3;
R and R.sup.1, which may be the same or different, are radicals selected from the group consisting of alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloxyalkoxy and aralkoxy, the alkyl portion of said radicals optionally including at least one hydroxyl radical but no halogen radicals and the aryl portion of said radicals optionally including at least one radical selected from the group consisting of chlorine, bromine and hydroxyl;
R.sup.2 is a radical selected from the group consisting of alkyl, hydroxyalkyl and aryl;
R.sup.3 is a radical selected from the group consisting of lower alkyl and hydroxyalkyl;
or said cyclic phosphonate ester having the formula (II) ##STR5## wherein:
d is a whole number of from 0 to 2;
e is a whole number of from 1 to 3;
(d+e) is 3;
R.sup.2 and R.sup.3 are as defined above;
R.sup.4 is a radical selected from the group consisting of alkyl, aryl, aralkyl and aryloxyalkyl, the aryl portion of said radicals optionally including at least one radical selected from the group consisting of bromine, chlorine and hydroxyl;
R.sup.5 is a tervalent hydrocarbyl radical, which may be aliphatic or aromatic and if aromatic, said radical R.sup.5 may optionally include a radical selected from the group consisting of bromine, chlorine, alkyl and hydroxyl;
(ii) at least one phosphono amide having the formula:
##STR6## wherein:
R.sup.6 is selected from the group consisting of hydrogen, alkyl radicals and alkenyl radicals;
R.sup.7 and R.sup.8 which may be the same or different, are organic radicals;
R.sup.9 is selected from the group consisting of hydrogen, halogen, alkyl radicals and radicals having the formula CH.sub.2 CONHCH.sub.2 OR.sup.6.
and
(iii) a co-curing agent for said component (ii), said co-curing agent being a material selected from the group consisting of urea, amino triazines, ethylene urea, acetylene diurea, etherified formaldehyde condensates of acetylene diurea and mixtures of any two or more of said materials, said composition having, in an aqueous solution, a pH value of 3 or less.

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