Flame-retardant and fabric-softening treatment of textile materials
AssigneeAlbright & Wilson UK Limited
InventorsMohsen Zakikhani, Xiao Ping Lei
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Abstract
A one-pack composition conferring flame-retardant and fabric-softening properties on fabrics comprises a THP.sup.+ salt, an organic nitrogen compound (eg urea) and a hydroxyl-reactive organic compound having 12 or more carbon atoms. Preferred examples of such compounds include C.sub.12 amine, C.sub.18 amine and tallow amine (viz C.sub.16 /C.sub.18 /C.sub.20 amine mixture).
Claims29
A composition for both flame-retarding and fabric-softening a textile material, wherein said composition comprises a product obtained by the reaction of:
- (a) a tetrakis (hydroxyorgano)phosphonium (THP.sup.+) salt;
- (b) an amide selected from the group consisting of urea and thiourea;
- and
- (c) an aliphatic hydroxyl-reactive compound containing at least one alkyl group having from 12 to 30 carbon atoms.
A method for making a composition for flame retarding and fabric softening a textile material, wherein said method comprises the following stages:
- (i) placing a tetrakis (hydroxyalkyl) phosphonium salt (THP+) solution in a vessel and adjusting its pH to about 6.0 with an inorganic base to form a first mixture;
- (ii) dissolving an amide selected from the group consisting of urea and thiourea in the first mixture to form a second mixture;
- (iii) adding an aliphatic hydroxyl-reactive compound, said aliphatic hydroxyl-reactive compound containing at least one alkyl group having from 12 to 30 carbon atoms, to the second mixture;
- (iv) maintaining the second mixture at an appropriate temperature for a time sufficient to bring about the formation of a condensation product between the tetrakis (hydroxyalkyl) phosphonium salt and the amide;
- (v) cooling the product;
- and
- (vi) adding sufficient water to the product to make a stable solution of said product.
Dependencies are inferred from the claim text.