JPH0441775A - 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 having excellent dispersibility in rinsing water containing an acid-neutralized amine having single ester group in the molecule as an essential ingredient. CONSTITUTION:An amine having single ester group in the molecule neutralized with inorganic acid or organic acid expressed by the formula (R<1> is 11-23C hydrocarbon; R is 8-24C hydrocarbon; (m) is 2 or 3) is mixed with an inorganic electrolyte (e.g. sodium chloride) in an amount of 0.3-20wt.% of above-mentioned compound to afford a liquid soft finishing agent having excellent dispersibility. Said finishing agent has excellent dispersibility in rinsing water in domestic washing and 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 one to two long-chain alkyl groups in one molecule, such as di(hardened tallow alkyl)dimethylammonium chloride. This is a composition with the main ingredient. 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 softener having the quaternary ammonium salt as its main base is usually commercially available and used as a 4-20% dispersion.

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.

In addition, liquid softeners using various amines as softening bases have been known for some time.
JP-A-58-60070 discloses a composition that imparts flexibility to fibers containing a long-chain alkylamine such as methyldi(hardened tallow alkyl)amine, and JP-A-58-60070 discloses a composition that imparts flexibility to fibers containing a long-chain alkylamine such as methyldi(hardened tallow alkyl)amine. A textile material finishing agent containing a quaternary ammonium salt and a fatty acid ester that gives smoothness and a comfortable touch is disclosed in JP-A No. 61167083.
JP-A No. 61-275474 discloses a softening agent with good dispersibility containing a quaternary ammonium compound, a condensation reaction product of a higher fatty acid and a human'roxy lower alkyl polyamine, and an alkylamine polyglycol ether. A stable aqueous dispersion for textile treatment containing a di(higher alkyl)cyclic amine and a Brønsted acid has been disclosed in JP-A-6
4-85368 discloses a softening composition containing a di-long chain alkylamine-anionic surfactant ion pair complex, a non-silicone wax, and a liquid carrier, as disclosed in JP-A-2-6662.
JP-A-2-14076 discloses a fabric conditioning composition containing an amine such as a condensate of a hydroxy lower alkyl alkylene diamine and a higher fatty acid, and an amphoteric fabric conditioning agent. Fabric conditioning compositions containing functional carboxylic acid complexes that impart softness and antistatic properties are described.

Further, JP-A-52-5394 describes a fabric conditioning composition containing a mono- or di-long chain alkyl alkylene diamine static electricity suppressant and a quaternary ammonium softener.

However, the effects of softeners containing these amines are still insufficient.

[Means to solve the problem]

As a result of intensive research into softeners containing amines, the present inventors discovered that a neutralized salt of a special ester amine compound has excellent flexibility and has very good dispersibility in rinsing water. It was completed.

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

(a) A neutralized product of an inorganic acid or an organic acid of an amine containing one ester group represented by the general formula (I) in the molecule.

[In the formula, R1 is a straight chain or branched saturated or unsaturated hydrocarbon group having 11 to 23 carbon atoms, R is a straight chain or branched saturated or unsaturated hydrocarbon group having 8 to 24 carbon atoms, and m is 2 or Represents 3. ] Neutralized ester amine compounds used in the present invention include alkanolamines such as N-long chain alkylgetanolamine and N-long chain alkyldibrobanolamine, and fatty acids having 12 to 24 carbon atoms or methyl fatty acids. A compound obtained by neutralizing the ester amine obtained by reaction with an ester with an inorganic acid such as hydrochloric acid or sulfuric acid, or an organic acid such as acetic acid, glycolic acid, lactic acid, citric acid, maleic acid, fumaric acid, or toluenesulfonic acid. can be mentioned. 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.

As for component (a), it is desirable that at least one of R and R in general formula (I) has 16 or more carbon atoms.

In the present invention, component (a) is present in the composition in an amount of 1 to 30% by weight, preferably 4 to 30% by weight, particularly preferably 10 to 30% by weight.
It is blended in an amount of 25% by weight.

The composition of the present invention can be obtained, for example, by slowly adding a melt or concentrate of an amine compound to an aqueous solution containing a neutralizing agent under stirring or shear mixing, but the method is not limited to this method. It can also be obtained by preparing a neutralized product in advance or adding a neutralizing agent afterwards.

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
Inorganic electrolytes that are preferably added at ~5% by weight include sodium chloride, sodium bromide, calcium chloride,
Examples include magnesium chloride.

Moreover, in order to exhibit dispersibility in water and a preferable softening effect, it is desirable that the average particle diameter of component (a) be in the range of 0.1 to 5-5. The most appropriate method for adjusting the average particle diameter within this range is to adjust the stirring shear force during blending depending on the type and amount of component (a). (a)
If the average particle diameter of the component is less than 0.1 stm, flexibility tends to decrease, and 5I! If it is larger than m, 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, Rff, R4, R1 and R9 are each an alkyl group, alkenyl group or β-hydroxyalkyl group having 10 to 24 carbon atoms, and BS, Rh and R7 are each an alkyl group having 1 to 3 carbon atoms or hydroxy Alkyl group, benzyl group or -(CJnO)q-H (however,
q is 1 to 3), χ is halogen or carbon number 1
Indicates a monoalkyl sulfate group having ~3 alkyl groups. ] Examples of compounds represented by general formula n) include sitalodimethylammonium chloride, sitalodimethylammonium methyl sulfate, di(hydrogenated tallow)dimethylammonium chloride, distearyldimethylammonium chloride, and dibehenyldimethylammonium chloride. , dioleyldimethylammonium chloride, and the like.

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

Examples of compounds represented by general formula (IV) include 1
-Methyl-1-tallowamido-ethyl 2-tallowimidazolinium methylsulfate, 1-methyl-1-(hydrogenated tallowtallowamidoethyl)imidazolinium methylsulfate, and the like.

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

Examples of compounds represented by the general formula (Vl) include methylbis(tallowamidoethyl)(2hydroxyethyl)ammonium methylsulfate and methylbis(hydrogenated tallowamidoethyl)(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. The ratio of component (a) to quaternary ammonium salt is (→/weight ratio of quaternary ammonium salt: 9515 to 20
/80, preferably from 9515 to 50150, particularly preferably from 90/10 to 60/40, and the sum of the weights of component (a) and quaternary ammonium salt in the composition is from 10 to It is preferably 30% by weight.

Furthermore, the liquid fabric softener of the present invention may contain nonionic surfactants such as polyoxyethylene (5 to 50 mol) alkyl or alkenyl (01□ to 24) ether, ethanol, propylene glycol, etc. to improve storage stability. Solvents such as ethylene glycol or urea, silicones such as polydimethylsiloxane, polyether-modified silicones, and amino-modified silicones to improve water absorption, pigments or dyes to improve product appearance, and whiteness to the finished product. 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 neutralized product of the amidoamine compound used in the present invention will be illustrated by a synthesis example.

Synthesis Example 546 g of N-laurylgetanolamine was added to 596 g of methyl stearate and reacted at 140 to 160°C for 3 hours to obtain an ester amine.

This condensate was added to 500 g of a 12% acetic acid aqueous solution to obtain the compound (a-1) of the present invention.

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> (I) 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 @ DI hard water (30 !washing machine)
After removing the fiber treatment agent attached to each fiber, 10 cc of a 15% dispersion of the blended composition shown in Table 2 was heated at 25°C.
Processed under stirring for 1 minute.

(2) Evaluation method After drying the cloth treated with the above method indoors at 25°C165
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 20 cc of a softener consisting 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.

12; Softer than the control +1; Slightly softer than the control 0; Same as the control 1; Control is slightly softer -2; Control is softer <Evaluation of water dispersibility> Hitachi fully automatic washing machine (product name "Shizuka Gozen for Bio 6"
Fill a 5J) 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 unevenly dispersed after 30 seconds - -2: Not dispersed at all even after 30 seconds Table 2 As shown in the figure, 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) Umbrella 1 Electrolyte blending amount; Weight % of component (a) Umbrella 2 Particle diameter; Measured by light scattering measuring instrument -3 Quaternary ammonium salt; Dicured 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.

1 gold 1 sole a -112% by weight Further, using the above composition, elasticity was evaluated by the following method.

<Evaluation of elasticity> Cotton towels treated in the same manner as in Examples 1 to 13 were folded into 8, stacked in 3 layers, and 5 g/c1il pressure was applied.
After applying pressure for a minute, the pressure was removed and the height of the towel 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
．． 7CI, the height of the towel when treated with the composition of Comparative Example 1 was 8.8 cm.

CaCIz 0.1
5 Fragrance 0.3 Water Balance The average particle diameter of the dispersed particles is 1.0. It is s.

Claims (1)

[Scope of Claims] 1. A liquid fabric softener characterized by containing the following component (a) as an essential component. (a) A neutralized product of an inorganic or organic acid of an amine containing one ester group represented by the general formula (I) in the molecule. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (I) [In the formula, R^1 is a straight chain or branched saturated or unsaturated hydrocarbon group having 11 to 23 carbon atoms, and R is a straight chain having 8 to 24 carbon atoms. or a branched saturated or unsaturated hydrocarbon group, m represents 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.