Treatment agents for textiles, method of producing same and...

Details Treatment agents for textiles, method of producing same and... Treatment agents for textiles, method of producing same and...

2001-09-26

2003-03-04

Niland, Patrick D. (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C427S372200, C427S385500, C428S423100, C524S590000, C524S591000, C524S839000, C524S840000, C442S043000, C442S059000

Reexamination Certificate

active

06528576

ABSTRACT:

Textile treatment compositions, preparation thereof and use thereof The invention relates to textile treatment compositions including bisulphite-blocked polyisocyanate prepolymers and specific softener formulations, to a process for preparing these textile treatment compositions and to their use.
The handle modification of textile materials is a very important field. Similarly, equipping textile materials to resist shrinkage under the influence of moisture is an important part of textile resin finishing. DE-C-24 14 470 describes for example the finishing of textile materials with bisulphite-blocked polyisocyanate prepolymers. These bisulphite-blocked polyisocyanate prepolymers are prepared by reacting polyisocyanates with polyhydroxy compounds and subsequently blocking the isocyanate end groups with bisulphite. Since bisulphite-blocked polyisocyanate prepolymers are self-crosslinking compounds, there is no need to add catalysts in the finishing step. However, it is disadvantageous that bisulphite-blocked polyisocyanate prepolymers do not perform equally well in all existing textile finishing processes.
U.S. Pat. No. 3,898,197 and GB-A-1,062,564 each disclose bisulphite-blocked polyisocyanate prepolymers useful for modifying keratinous fibres.
However, when bisulphite-blocked polyisocyanate prepolymers are used to provide shrink resistance to and influence the handle of textile materials they generally also significantly reduce the softness of the finished materials. This is why it is customary to include softeners in the finish which make good this disadvantage. The various known softener types and their properties are reviewed by P. Hardt in Melliand Textilberichte 9/1990, p. 699.
JP 09195167 A2 discloses in particular cationic softener compositions comprising polyhydric alcohols. DE-A-19 629 666 describes the use of alkylpolyglycosides for hydrophilicizing polypropylene and polyester fibres. DE-A-31 38 181 describes softener mixtures which include fatty acid amides.
The use of these substances in the finish confers a very soft handle on the textile materials. But known softeners all have the disadvantage that they generally contain a long hydrophobic moiety. This hydrophobic moiety is in turn responsible for the poor water-absorbing properties of the treated textiles. This hydrophobicity is unwelcome especially in the case of towels, bathrobes and terry material.
It is an object of the present invention to provide a self-crosslinking textile treatment composition whereby the textile material is simultaneously provided with good hydrophilicity, a good soft handle and a high surface smoothness. In addition, the textile treatment composition shall be very widely usable in all existing textile finishing processes and, in particular, have such a liquor stability that it can be applied to textiles via jet dyeing machines.
The invention provides textile treatment compositions characterized in that they include two components K1 and K2 in a weight ratio of (0.1-5):1,
where K1 is a mixture which includes
(A) 0-30% by weight of polyalcohols obtainable by the reaction of formaldehyde with ketones bearing at least 4 replaceable hydrogens adjacent to the carbonyl group, in the presence of alkaline catalysts,
(B) 0-30% by weight of polyalcohols which have at least two OH groups and do not come within the definition of A),
(C) 0.1-10% by weight of adducts of C
12
-C
22
fatty acids or C
8
-C
18
fatty alcohols or C
12
-C
36
-alkyl- or di-(C
12
-C
36
)-alkyl-amines or C
9
-C
24
-alkylphenols with 2-100 mol of ethylene oxide, and
(D) 70-99.9% by weight of an aqueous softener formulation which includes 10-90% by weight of softener compounds, based on the aqueous softener formulation,
 where (A)+(B)≧0.1% by weight, based on the sum total of the individual components (A) to (D),
and the component K2 is a polyisocyanate prepolymer whose isocyanate groups are present in bisulphite-blocked form.
The polyalcohols (A) of component K1 are obtainable by reacting formaldehyde with ketones bearing at least 4 replaceable hydrogen atoms adjacent to the carbonyl group, in the presence of alkaline catalysts.
The ketones preferably have the general formula (1)
where
R and R′ are independently straight-chain or branched C
1
-C
24
-alkyl, C
1
-C
24
-alkenyl, phenyl or naphthyl radicals or R and R′ combine to form an alkylene radical —(—CH
2
—)—
p
where p=2-6 and one or two CH
2
groups may be replaced by a hetero atom, preferably oxygen,
m is 0 or 1, and
n is 0, 1, 2, 3or 4.
Preferably R and R′ are independently —CH
3
, —C
2
H
5
, —C
3
H
7
, —i—C
3
H
7
, —C
4
H
9
, —CH=C(CH
3
)
2
or combine to form an alkylene radical
where p=2 or 3.
The straight-chain or branched C
1
-C
24
-alkyl and C
1
-C
24
-alkenyl groups of R and R′ are optionally substituted by OH, COOH or SO
3
H. Similarly, the phenyl or naphthyl radical may be substituted by OH, COOH or SO
3
H. Thusly substituted R and R′ preferably have the formulae —CH
2
-COOH and —CH
2
-C(CH
3
)
2
(OH).
Useful ketones are particularly alicyclic ketones, such as cyclopentanone and cyclohiexanione; similarly, aliphatic ketones such as acetone, methyl ethyl ketone, methyl propyl ketone, methyl isopropyl ketone, methyl butyl ketone, methyl isobutyl ketone, methyl sec-butyl ketone, mesityl oxide, diacetone alcohol, laevulinic acid, diethyl ketone, diacetyl, acetylacetone, acetonylacetone or methyl benzyl ketone are particularly suitable.
Formaldehyde can be used in the form of paraformaldehyde, trioxymethylene or a formaldehyde polymer which releases formaldehyde under reaction conditions.
The polyalcohols (A) of component K1 are particularly preferably compounds of the formulae 2(1) to 2(8), which are obtainable via the abovementioned reaction:
Examples of suitable alkaline catalysts are oxides or hydroxides of the alkali or alkaline earth metals. Preference is given to the use of alkaline earth metal hydroxides, especially calcium hydroxide.
The preparation of the polyalcohols (A) is described in general terms in U.S. Pat. No. 2,462,031 incorporated herein by reference.
The polyalcohols (B) of component K1 possess at least two OH groups and do not come within the definition of the polyalcohols (A).
Examples of suitable polyalcohols (B) are pentaerythritol, neopentyl glycol, ethylene glycol, diethylene glycol, triethylene glycol, trimethylolpropane, glycerol, polyglycerol, dipentaerythritol, diglycerol, glucose or carbohydrates having more than 2 OH groups.
The ethylene oxide adducts (C) of component K1 are adducts of C
12
-C
22
fatty acids or C
8
-C
18
fatty alcohols or C
12
-C
36
-alkyl- or di-(C
12
-C
36
)-alkyl-amines or C
9
-C
24
-alkylphenols with 2-100 mol of ethylene oxide (see, for example, Tensid-Taschenbuch by W. Stache, 2nd Edition, 1981, p. 617-662).
Particularly preferred ethylene oxide adducts (C) are for example adducts of stearyl alcohol with 19, 56 or 95 mol of ethylene oxide, of oleyl alcohol with 19, 56 or 95 mol of ethylene oxide, of stearic acid with 6.5, 8.5 or 10 mol of ethylene oxide, of oleic acid with 6.5, 8.5 or 10 mol of ethylene oxide or of tallowamine with 2, 4.5, 10, 22 or 25 mol of ethylene oxide.
The components included in the aqueous softener formulation (D) are for example extensively described in DE-A 31 38 181 (counterpart of US-A 4,446,034, incorporated by reference). These are for example aqueous mixtures M1 including 50-80% by weight of the component (I) which comprises acylated alkanolamines obtainable by reacting saturated or unsaturated C
12
-C
22
-carboxylic acids and alkanolamines containing 1 or 2 nitrogen atoms, 1-3 OH groups and 2-6 carbon atoms, in a molar ratio of (1-3):1, 10-30% by weight of the component (II) which comprises water-soluble, quaternary ammonium salts of the general formula (3)
wherein
R
1
is a C
14
-C
25
-alkyl- or -alkenyl radical which is interrupted by an amide and/or ester group,
R
2
is a radical with the meaning of R
1
or a C
1
-C
4
-alkyl radical,
R
3
and R
4
are independently a C
1
-C
4
-alkyl radical, a hydroxyethyl,

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