JPH01321977A - Method for reducing or preventing discoloration of textile materials - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION One problem that arises with dyed materials containing free dyes or dyes that are not sufficiently bound to the material is that the dyes do not remain in the material during normal home washing operations;
That is, free or poorly bound dyes can be liberated and therefore absorbed by other substrates (dyed or undyed), thereby affecting the hue. or the actual coloration of these other substrates.

To solve this problem, the present invention provides a method for reducing or preventing discoloration of textile materials in washing baths, comprising: free dyes or releasable dyes (i.e., which can be removed from the material by washing). one or more dyed textile materials containing dyes), together with textile materials capable of being discolored, in the following A-
D. A. Monofunctional or polyfunctional amines having one or more primary, secondary and/or tertiary amino groups, up to 50% of which are dicarboxylic acids or their mono- or di- A polymeric reaction product containing at least one free hydrogen atom bonded to a nitrogen atom with cyanamide, dicyandiamide (DCDA), guanidine or bisguanide optionally substituted with an ester, or B, said product A and an epihalohydrin. or a water-soluble polymeric reaction product with its precursor, or C0 at least 1
D, a water-soluble homopolymer or copolymer of mono- or di-allylamine capable of forming an acid addition salt and/or at least one N atom is an ammonium group, or D, at least one N with monomers copolymerizable with mono- and/or di- and/or tri-allyl amines whose atoms are capable of forming acid addition salts and/or in which at least one N atom is a quaternary ammonium group. a water-soluble copolymer, or a mixture of one or more of the above-mentioned products A to D. A method is provided that includes washing the dye in the presence of a dye scavenger (for entrapment).

Dye scavengers may be dyed or undyed. Preferably the scavenger is undyed.

Preferably, the polymer material of the dye scavenger is 4000 or more,
More preferably, it has a molecular weight of 5,000 or more.

The products A are known and described, for example, in published British Patent Application No. 2,142,642, US Pat. No. 4,764,585 and US Pat. It can be produced by method D.

Suitably, the amine in free base or salt form is reacted with the other starting materials without the intervention of water at elevated temperature, if desired in the presence of a non-aqueous solvent. Preferably, the reaction is 140
carried out without solvent intervention at a temperature of ~160°C;
Ammonia is liberated for many reactant combinations. The reactants preferably contain from 0.1 to 1 mole of cyanamide per mole of reactive -NH- or -NH2 groups,
DCDA, guanidine or biguanide are reacted in a molar ratio, and when DCDA is reacted with a polyalkylene polyamine, the molar ratio of these reactants is more preferably between 2:1 and 1:2, especially about 1:l. It is. Preferably, the reactants are catalysts selected from metals, metal salts, and heterocyclic nitrogen-containing compounds (U.S. Pat. No. 4,764,585).
The reaction is carried out in the presence of a catalyst (defined as a catalyst).

The product A is a nearly colorless viscous liquid or solid, D is basic, and is water-soluble in organic base or salt form.
, containing a reactive hydrogen atom bonded to nitrogen.

Up to 50 mol%, preferably up to 20 mol%, of the DCDA or other agent to be reacted with the amine may be replaced by dicarboxylic acids or mono- or di-esters thereof. Suitable acids include adipic acid, oxalic acid and terephthalic acid, such as acids in the form of their dimethyl esters.

Particularly preferred products A are preferably U.S. Pat.
4,585, the reaction product of DCDA with diethylenetriamine or triethylenetetramine in the presence of a catalyst selected from metals, metal salts and heterocyclic nitrogen-containing compounds (in particular zinc chloride) .

Product B is described in US Pat. No. 4,439,203.

Products C and D are published in Japanese Patent Application Publication No. 51-5779.
3.56-9999.56-53292.56-134
284.57-11288.57-82591.57-
92012.60-7079.45-1457 and 4
9-31631.

Other products C and D are described in EP 280,655 and in DE 37 20 508.

Preferably, the polymeric material is product A, C or D.

More preferably, the polymeric material of the scavenger is a product A or a product C'', ie a synergistic mixture D, comprising as active ingredients a textile auxiliary agent (T) and a polymeric compound (P), where T is 1)4 2) reacting the epihalohydrin with aqueous ammonia at 50-90"C at an initial molar ratio of 8-10 moles of ammonia to 8-10 moles of ammonia; and 2) after removal of excess ammonia, the product 1 of step 1 is further 0. The product of a two-step reaction involving reaction with 1 to 0.5 moles of epihalohydrin, in which D and P contain a water-soluble homopolymer of mono-di-allylamine or mono-di- or tri-allylamine units ( Preferably, it is a water-soluble copolymer (consisting of such a potential).

Such products are described in EP 280.655 (corresponding to US patent application 151.032).

The synergistic mixture may further include: 3) the reaction product of epichlorohydrin or its precursor and a polyalkylene polyamine.

Most preferably, the polymeric material is Product A (particularly the product of Example 1 described in US Pat. No. 4,764,585).

The amount of polymeric material to the base material of the scavenger is 1 to 20% of the base material.
% by weight, more preferably 2 to 6% by weight.

The scavenger may be in any form. The polymeric material may be applied to the entire substrate or only to the surface. Preferred substrates include fabrics, garments, films, nonwoven materials or paper.

The substrate may be natural or synthetic, preferably undyed cotton, undyed regenerated cellulose or undyed natural or synthetic polyamide.

The substrate is treated with any of the products A to D by D, for example by impregnation, padding, spraying, printing, exhaustion, etc., by known methods. The amount used is preferably 2 to 200g/
I! , more preferably 10 to 80 g/i (components A to
D), the preferred bath ratio is 1:1
~1:30.

The cleaning agents so obtained can be used in standard laundry operations by simply adding them to the laundry. Scavengers trap free or liberated dyes. In particular, it captures anionic dyes that are free in the bath. In this way, the scavenger will prevent soiling of the laundry with undesirable free dyes that are undesirably absorbed onto other laundry items in the wash. The scavenger is optimally effective, especially for light-colored dyeings, preferably at no higher than 1/1 standard concentration.

The amount of scavenger should be sufficient to prevent or reduce staining and/or discoloration. This amount will vary depending on the total amount of laundry and the nature of the laundry containing free or releasable dye.

The amount of cleaning agent for each load of laundry is preferably 1
5-80g per kg, more preferably 10-30g
It is.

- Preferably, the base material of the scavenger is a fibrous material.

In this specification, products A to D also include mixtures thereof, unless otherwise specified.

The invention is further illustrated by the following examples. In the examples, D, parts and % are by weight, and temperatures are in °C unless otherwise specified.

Example 1 A 100% cotton fabric was padded (squeezed to 80% dry weight) with the product of Example 1 of US Pat. No. 4,764,585, at 60 g/i calculated on 100% active substance.
This was then dried at 100°C.

This fibrous material (hereinafter referred to as scavenger) is then treated with C,
1. Added to domestic colored laundry consisting of cotton fabrics dyed with Reactive Violet 23 and undyed cotton fabrics. The weight of the laundry is 3 kg.D
, the bath ratio was 1:4. The washing powder used was
“Omo” is a commercially available product for 60°C.
It was used in an amount of g/l.

The amount (weight) of cleaning agent to the laundry is about 1%, i.e. 30
g of scavenger was used.

The laundry and cleaning agent were then washed in a Bauknecht washing machine, a commercial domestic washing machine, at 60°C and then dried.

After drying, it was observed that the dye scavenger absorbed the dye from the dyeing with insufficient fastness.

Example 2 C, 1, C instead of reactive violet 23,
1. Example 1 was repeated using Direct Blue 251. The resulting scavenger was contaminated with free dye.

Example 3 The polymeric product of Example 1 of GB 2,192,893 A was used to prepare a dye scavenger.

Example 1 was repeated using the following laundry items.

60-70% cotton dyed with C,1, Direct Blue 251, 10% nylon dyed with the dye of Example 1 of DE 2,400,654, 15% C,1, Day. Dacron T56 stained with Sparse Yellow 23 and 5% of C,1
, 0rion stained with Basic Blue 45
0 Next, the laundry was washed at 60° C. with a cleaning agent.

The scavenger absorbed the free dyes present (mainly C, R, Direct Blue 251) while the laundry fabric retained its clear hue.

In all of these examples, the other fabrics in the laundry had very little free or released dye staining compared to the cleaner.

Claims (1)

[Claims] 1. A method for reducing or preventing discoloration of textile materials in a washing bath, comprising a free dye or a releasable dye (i.e., a dye that can be removed from the material by washing). or more dyed fibrous materials, together with fibrous materials that can be discolored, as described in A to
D. A. Monofunctional or polyfunctional amines having one or more primary, secondary and/or tertiary amino groups, up to 50% of which are dicarboxylic acids or their mono- or di- A polymeric reaction product containing at least one free hydrogen atom bonded to a nitrogen atom with cyanamide, dicyandiamide (DCDA), guanidine or bisguanide optionally substituted with an ester, or B, said product A and an epihalohydrin. or a water-soluble polymeric reaction product with a precursor thereof, or C, at least 1
D, a water-soluble homopolymer or copolymer of mono- or di-allylamine capable of forming an acid addition salt and/or at least one N atom is an ammonium group, or D, at least one N atom is capable of forming acid addition salts and/or in which at least one N atom is a quaternary ammonium group. or a mixture of one or more of the above-mentioned products A to D is applied (capturing free dyes or dyes released on washing). washing in the presence of a dye scavenger). 2. The method of claim 1, wherein the dye scavenger is undyed. 3. The method according to claim 1, wherein the polymeric material of the dye scavenger has a molecular weight of 4,000 or more. 4. the polymeric material is selected from products A, C or D;
The method according to claim 1. 5. The method according to claim 1, wherein the polymeric material is product A. 6. The polymeric material is the reaction product of diethylenetriamine or triethylenetetramine and DCDA, reacted at elevated temperature in the presence of a catalyst selected from metals, metal salts and heterocyclic nitrogen-containing organic bases. The method according to claim 1. 7. The method according to claim 6, wherein the catalyst is zinc chloride. 8. The polymeric material is a synergistic mixture containing as active ingredients a textile auxiliary (T) and a polymeric compound (P), where T is 1) 50 in an initial molar ratio of 4 moles of epihalohydrin to 8 to 10 moles of ammonia. A two-step reaction comprising reacting epihalohydrin with aqueous ammonia at ~90°C, and 2) reacting the product of step 1 with a further 0.1-0.5 moles of epihalohydrin after removal of excess ammonia. a water-soluble homopolymer of mono- or di-allylamine or mono-,
2. The method of claim 1, wherein the copolymer is a water-soluble copolymer consisting of di- or tri-allylamine units. 9. The method of claim 8, wherein the polymeric material further comprises 3) a reaction product of epichlorohydrin or its precursor and a polyalkylene polyamine.