JPH0441774A - Liquid soft finishing agent - Google Patents

Abstract

PURPOSE:To obtain a liquid soft finishing agent for domestic use giving excellent softness to various fibers and exhibiting excellent dispersibility in rinsing water containing a quaternary an amide compound obtained by condensation reaction of a specific diamine and fatty acid, as an essential ingredient. CONSTITUTION:Diamine expressed by formula I (R<1> is 8-24C hydrocarbon group; (n) is 2 or 3) is subjected to condensation reaction with a compound expressed by formula II (R<2> is 7-23C hydrocarbon group) to obtain an amine having amide bonding. Next, said amine is made to quaternary compound by methyl chloride, etc., and the resultant compound is mixed with inorganic electrolyte (e.g. sodium chloride) in an amount of 0.3-20wt.% of the above-mentioned amine compound to afford a liquid soft finishing agent having extremely excellent dispersibility. Said finishing agent has excellent dispersibility in rinsing water in domestic washing and also imparts excellent softness and softness with enriched elasticity to various fibers.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid fabric softener that imparts excellent flexibility to various fibers and has good dispersibility in rinsing water. This invention relates to household liquid fabric softeners.

[Problems to be solved by conventional techniques and inventions] Currently,
Most commercially available household fabric softeners contain quaternary ammonium salts with two long-chain alkyl groups in each molecule, such as di(hardened tallow alkyl)dimethylammonium chloride. It is a composition with

The reason for this is that a small amount of quaternary ammonium salt has a good softening effect on various fibers.

The above-mentioned fabric softeners mainly composed of quaternary ammonium salts are commercially available and used as dispersions of 4 to 20%.

Quaternary ammonium salts are highly hydrophobic, so if the stirring force is weak when adding them to the rinsing water, they will have poor dispersibility in water.
Therefore, there is a possibility that it may become uneven on clothing. Commercially available softeners contain various additives in addition to the above-mentioned quaternary ammonium salt to improve their dispersibility in water, but their effects are still insufficient.

Liquid softeners using many quaternary ammonium salts as softening bases have been studied. For example, JP-A-2-6664
JP-A-55-76168 discloses a softening agent containing a quaternized partially amidated product which is a condensation product of an N-alkylamine having 3 or more nitrogen atoms and a higher fatty acid; Softeners containing quaternized products of '-dialkylalkylene diamines have been described, but their dispersibility in water is still insufficient.

[Means to solve the problem]

In view of the above circumstances, the present inventors have excellent flexibility,
As a result of intensive research to provide a fabric softener with good dispersibility in water, we discovered that a quaternized product of a special amidoamine compound has excellent flexibility and has very good dispersibility in rinsing water. The present invention has now been completed.

That is, the present invention provides a liquid fabric softener characterized by containing the following component (a) as an essential component.

(a) Diamine represented by general formula (I) and general formula (
A quaternized product of an amidoamine compound obtained by a condensation reaction with a fatty acid represented by II).

R'NHC-Hz-NHz (I)
j R''-C-OH (II) [In the formula, R1 is a straight chain or branched saturated or unsaturated hydrocarbon group having 8 to 24 carbon atoms, and R1 is a straight chain or branched chain having 7 to 23 carbon atoms. The saturated or unsaturated hydrocarbon group is 2 or 3, preferably 3.] The quaternized product of the amidoamine compound used in the present invention is N)
Quaternizing an amine having an amide bond obtained by a condensation reaction of 1 mole of the diamine represented by the formula and 1 to 2 moles of the fatty acid represented by the formula (II) with methyl chloride, dimethyl sulfate, diethyl sulfate, etc. by a conventional method. It is obtained by

The fatty acids used in this reaction are generally derived from natural oils such as coconut oil, palm oil, beef tallow, rapeseed oil, and fish oil, but chemically synthesized fatty acids may also be used.

In general formulas (1) and (I[), at least one of R1 and R1 preferably has 16 or more carbon atoms.

In the present invention, (→ component is 1 to 30% by weight in the composition)
, preferably 4 to 30% by weight, particularly preferably 10 to 2% by weight
It is blended in an amount of 5% by weight.

The composition of the present invention can be obtained, for example, by slowly adding a melt or concentrate of a quaternized amidoamine compound to an aqueous solution under stirring or shear mixing, but the method is not limited to this method. It can also be obtained by a method such as preparing a hydrate in advance or adding a neutralizing agent afterward.

When preparing the composition, in order to further improve viscosity reduction and dispersibility, 0.3 to 20% by weight of an inorganic electrolyte is added to component (a).
Preferably 0.6 to 10% by weight, particularly preferably 0.6
It is desirable to add up to 5% by weight. No I! Examples of the electrolyte include sodium chloride, sodium bromide, calcium chloride, and magnesium chloride.

In addition, in order to exhibit dispersibility in water and a preferable softening effect, it is desirable that the average particle size of component (a) be in the range of 0.1 to 5-5, and the average particle size should be adjusted within this range. The most appropriate method for this is to adjust the stirring shear force during blending depending on the type and amount of component (a). If the average particle diameter is less than 0.1 mm, the flexibility tends to decrease, and if it is larger than 5 mm, the dispersibility in water tends to decrease.

The liquid softener of the present invention may contain quaternary ammonium salts that have been commonly used, such as those shown below.

[In the formula, H2, H4, R@ and R9 each have 1 carbon number
0 to 24 alkyl group, alkenyl group, or β-hydroxyalkyl group, and R5, R6, and R7 are each an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, a benzyl group, or -(ctn4o)qn (however, ,
q is 1 to 3), and X is halogen or carbon number 1
Examples of the compound represented by the general formula (III), which represents a monoalkyl sulfate group having ~3 alkyl groups, include citalodimethylammonium chloride, citalodimethylammonium methyl sulfate, and di(hydrogenated tallow) dimethyl. Examples include ammonium chloride, distearyldimethylammonium chloride, dibehenyldimethylammonium chloride, dioleyldimethylammonium chloride, and the like.

Examples of compounds represented by the general formula (TV) include monochrome-trimethylammonium chloride, mono(
Examples include hydrogenated tallow) trimethylammonium chloride.

Examples of compounds represented by the general formula (V,) include 1
-Methyl-1-tallowamido-ethyl-2-tallowimidazolinium methyl sulfate, l-methyl-1-(
Examples include hydrogenated tallow tallow amidoethyl) imidazolinium methyl sulfate.

Examples of the compound represented by the general formula (Vl) include methylbis(tallowyloxyethyl)(2-hydroxyethyl)ammonium chloride, methylbis(stearoyloxyethyl)(2-hydroxyethyl)ammonium methylsulfate, etc. .

Examples of compounds represented by the general formula (■) include methylbis(tallowamideethyl)(2-hydroxyethyl)ammonium methylsulfate and methylbis(hydrogenated tallowamideethyl)(2-hydroxyethyl)
Examples include ammonium methyl sulfate.

By using these quaternary ammonium salts in combination, it is possible to impart softness with elasticity (fluffiness) to clothing.

Furthermore, the liquid fabric softener of the present invention may contain nonionic surfactants such as polyoxyethylene (5 to 50 mol) alkyl or alkenyl (Cz* to 84) ether, ethanol, propylene glycol, etc. to improve storage stability. Solvents such as ethylene glycol or urea; silicones such as polydimethylsiloxane, polyether-modified silicone, and amino-modified silicone to improve water absorption; pigments or dyes to improve the appearance of the product; and pigments or dyes to improve the whiteness of the finish. A fluorescent brightener and a fragrance can also be added to improve the appearance during use and after finishing.

〔Example〕

Next, the present invention will be explained in detail with reference to Examples, but the present invention is not limited to these Examples.

A method for producing a quaternized amidoamine compound used in the present invention will be illustrated by a synthesis example.

Synthesis Example 568 g (2 mol) of stearic acid was processed with 484 g (2 mol) of N-laurylpropylene diamine, 17
The reaction was carried out at 0 to 190°C for 3 hours, and 35 g of water was distilled off to obtain an amidoamine compound.

This amidoamine compound is quaternized by a known method,
Compound (a-1) of the present invention was obtained.

Similarly, compounds (a-2) of the present invention as shown in Table 1
(a-5) was synthesized.

Composition of Table 1 (a) Component Examples 1 to 13 and Comparative Example 1 The compositions having the formulations shown in Table 2 were evaluated for flexibility and water dispersibility by the following methods.

<Evaluation of flexibility> (1) Processing method 2 kg of commercially available cotton towels and 1 kg of acrylic chassis were washed 5 times with commercially available detergent Attack (manufactured by Kao Corporation, registered trademark) in 3.5” DH hard water (301 After washing the fabric (washing machine) and removing the fiber treatment agent attached to each fiber,
25°C at 10cc of a 15% dispersion of the blended composition in Table 2.
, under stirring for 1 minute.

(2) Evaluation method After drying the cloth treated with the above method indoors, 25℃, 65%
It was left in a constant temperature and humidity room at RH for 24 hours.

The flexibility of these fabrics was evaluated.

The softness evaluation was performed using 10cc of a softener made of 15% by weight of dihydrogenated beef tallow alkyldimethylammonium chloride.
Pairwise comparisons were made using the treated fabric as a control. The evaluation is expressed as follows.

+2・Softer than the control +l; Slightly softer than the control 0 Same as the control −1・Slightly softer than the control −2・Softer than the control <Evaluation of water dispersibility> Hitachi fully automatic washing II (product name [Shizuka Gozen for Bio
Fill a 65J) with water to a high water level and run it for 2 minutes with a soft water flow. After stopping the operation, the composition shown in Table 2 was added 5 seconds later, and the dispersibility was observed 5.10.30 seconds later. The evaluation is expressed as follows.

+2; Uniformly dispersed after 5 seconds +1; Uniformly dispersed after 10 seconds 0; Uniformly dispersed after 30 seconds -1; Partially uneven after 30 seconds - 2i Not dispersed or dispersed at all even after 30 seconds Shown in Table 2 Thus, by using the compound of the present invention, an effect that satisfies both flexibility and water dispersibility can be obtained.

Table 2 Flexibility, water dispersibility (Note) Rate 1 Blend amount of electrolyte; Weight % with respect to component (a) 2 Particle diameter; Rate 3a-6 measured by light scattering measuring instrument; Dihardened beef tallow alkyl dimethyl ammonium chloride; The amount of component (a) in the composition is 15% by weight.

Example 14 The following compositions were prepared and evaluated for flexibility and water dispersibility in the same manner as Examples 1-13. As a result, flexibility is +1,
Water dispersibility was +2.

L gold plate claw a -112% by weight Elasticity was evaluated.

<Evaluation of elasticity> Cotton towels treated in the same manner as in Examples 1 to 13 were folded into 8 and stacked in 3 layers, and after pressurizing at a pressure of 5 g/d for 5 minutes, the pressure was removed and the height of the towel was adjusted. was measured.

The higher the height of the towel, the better the elasticity.

As a result, the height of the towel when treated with the above composition was 9
．． 8C11, the height of the towel when treated with the composition of Comparative Example 1 was 8.8 CIl.

CaC1tO,
15 Perfume 0.3 Water Balance Note that the average particle diameter of the dispersed particles is 1.3μ.

Claims (1)

[Scope of Claims] 1. A liquid fabric softener characterized by containing the following component (a) as an essential component. (a) Diamine represented by general formula (I) and general formula (II)
) A quaternized product of an amidoamine compound obtained by a condensation reaction with a fatty acid represented by R^1NHC_mH_2_mNH_2(I)▲Formula,
Chemical formulas, tables, etc. are available▼(II) [In the formula, R^1 is a straight chain or branched saturated or unsaturated hydrocarbon group having 8 to 24 carbon atoms, and R^2 is a straight chain having 7 to 23 carbon atoms. chain or branched saturated or unsaturated hydrocarbon group, m is 2
Or 3. ] 2 Furthermore, the amount of inorganic electrolyte is 0.3 to 20% relative to component (a).
% by weight of the liquid fabric softener according to claim 1.