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US 4,752,300 AGranted
Dyeing and fire retardant treatment for nomex
AssigneeBurlington Industries, Inc.
InventorJames R. Johnson
Life of this patent
Estimating the term…
Abstract
Poly(m-phenyleneisophthalamide) fibers are simultaneously dyed and imparted improved flame retardant properties with a fire retardant liquid in which a disperse or acid dye is dissolved. Fabrics thus dyed and FR treated exhibit no afterglow when exposed to an open flame and a Limiting Oxygen Index greater than their undyed counterparts.
Claims13
A process of simultaneously dyeing and flame retarding an aramid fiber, comprising the steps of:
- (1) contacting dyeable poly(m-phenyleneisophthalamide) fibers or fabric with a solution consisting essentially of a flame-retarding amount of a cyclic phosphonate ester flame retardant represented by the formulae:
- ##STR4## where a is 0 or 1;
- b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3;
- R and R' are the same or different and are alkyl (C.sub.1 -C.sub.8), phenyl, halophenyl, hydroxyphenyl, tolyl, xylyl, benzyl, phenethyl, hydroxyethyl, phenoxyethyl, or dibromophenoxymethyl;
- R.sup.2 is alkyl (C.sub.1 -C.sub.4);
- and R.sup.3 is lower alkyl (C.sub.1 -C.sub.4) or hydroxyalkyl (C.sub.1 -C.sub.4);
- or ##STR5## where d is 0, 1 or 2;
- e is 1, 2 or 3;
- R.sup.2 is alkyl (C.sub.1 -C.sub.4);
- R.sup.3 is lower alkyl (C.sub.1 -C.sub.4) or hydroxyalkyl (C.sub.1 -C.sub.4), R.sup.4 is alkyl (C.sub.1 -C.sub.4) phenyl, halophenyl, hydroxyphenyl, hydroxyethyl, phenoxyethyl, dibromophenoxyethyl, tolyl, xylyl, benzyl, or phenethyl;
- and R.sup.5 is monovalent alkyl (C.sub.1 -C.sub.6), chlorophenyl, bromophenyl, dibromophenyl, tribromophenyl, hydroxyphenyl, naphthyl, tolyl, xylyl, benzyl, or phenethyl;
- divalent alkylene (C.sub.1 -C.sub.6), vinylene, o-phenylene, m-phenylene, p-phenylene, tetrachlorphenylene (o, m, or p), or tetrabromophenylene (o, m, or p);
- or trivalent phenyl and a disperse dyestuff, an acid dyestuff or both;
- and
- (2) heating the aramid fiber treated in step (1) to fix said dye to said fiber.
12 more elements
A process of dyeing and imparting a flame retardant treatment to a dyeable aramid fiber, comprising the successive steps:
- (1) contacting a dyeable poly(m-phenyleneisophthalamide) fiber with a solution consisting essentially of a flame-retarding amount of a cyclic phosphonate ester flame retardant represented by the formulae:
- ##STR6## where a is 0 or 1;
- b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3;
- R and R' are the same or different and are alkyl (C.sub.1 -C.sub.8), phenyl, halophenyl, hydroxyphenyl, tolyl, xylyl, benzyl, phenethyl, hydroxyethyl, phenoxyethyl, or dibromophenyoxymehtyl;
- R.sup.2 is alkyl (C.sub.1 -C.sub.4);
- and R.sup.3 is lower alkyl (C.sub.1 -C.sub.4) or hydroxyalkyl (C.sub.1 -C.sub.4);
- or ##STR7## where d is 0, 1 or 2;
- e is 1, 2 or 3;
- R.sup.2 is alkyl (C.sub.1 -C.sub.4);
- R.sup.3 is lower alkyl (C.sub.1 -C.sub.4) or hydroxyalkyl (C.sub.1 -C.sub.4);
- R.sup.4 is alkyl (C.sub.1 -C.sub.4) phenyl, halophenyl, hydroxyphenyl, hydroxyethyl, phenyoxyethyl, dibromophenoxyethyl, tolyl, xylyl, benzyl, or phenethyl;
- and R.sup.5 is monovalent alkyl (C.sub.1 -C.sub.6), chlorophenyl, bromophenyl, dibromophenyl, tribromophenyl, hydroxyphenyl, naphthyl, tolyl, xylyl, benzyl, or phenethyl;
- divalent alkylene (C.sub.1 -C.sub.6), vinylene, o-phenylene, m-phenylene, p-phenylene, tetrachlorphenylene (o, m, or p), or tetrabromophenylene (o, m, or p);
- or trivalent phenenyl and a disperse dyestuff, an acid dyestuff or both, the solution being maintained at a temperature of from about 300.degree. F. to a temperature not greater than the boiling point of the solution;
- (2) allowing the fiber to remain in contact with the solution until the dye is fixed to the fiber;
- and
- (3) removing and drying the dyed and flame-retardant-treated fiber.
14 more elements
Dependencies are inferred from the claim text.