JP3164679B2 - Liquid soft finish - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft finish, and more particularly to a liquid soft finish capable of imparting excellent flexibility and elasticity (fluffiness) to various fibers.

[0002]

2. Description of the Related Art
Commercially available products as household softeners are mostly quaternary ammonium salts having 1-2 long-chain alkyl groups in one molecule such as di (hardened tallow alkyl) dimethylammonium chloride. It is a composition containing a main component. The reason for this is that the quaternary ammonium salt has a good softening effect on various fibers in a small amount.

[0003] However, the above quaternary ammonium salts have a remarkable softening effect on cotton,
It is hard to say that the effect is sufficient for synthetic fibers such as acrylic, polyester, and polyamide. If the treatment is performed at a higher concentration, the elasticity of the garment may be reduced and the texture may be impaired.

[0004] In the case of long-term storage, the viscosity may increase, the composition may become a gel, or may be separated, especially at low temperatures.

For this reason, various polyoxyethylene-based nonionic activators, electrolytes, and solvents other than the soft component are required, and many of them are blended for stabilization, but the effect is still insufficient.

[0006] The above-mentioned softening agents based on quaternary ammonium salts are usually marketed as 4-20% dispersions,
It is used.

[0007] Since the quaternary ammonium salt has a strong hydrophobicity, when it is poured into rinse water, if the stirring power is weak, the quaternary ammonium salt is poorly dispersible in water, which may cause unevenness in clothing. Commercially available softeners incorporate various additives in addition to the above quaternary ammonium salts to improve dispersibility in water, but their effects are still insufficient.

[0008] In addition, conventionally, liquid softening agents containing various amines as softening bases are known. For example, JP
No. 597965 discloses methyldi (hardened tallow alkyl)
JP-A-58-60070 discloses a composition for imparting flexibility to a fiber containing a long-chain alkylamine such as an amine containing an acylated alkanolamine, a water-soluble quaternary ammonium salt and a fatty acid ester. A fibrous material finishing agent that gives smoothness and a comfortable touch to the growing fiber is disclosed in
Japanese Patent Application Laid-Open No. 1-167083 discloses a softener having good dispersibility containing a quaternary ammonium compound, a higher fatty acid and a hydroxy lower alkyl polyamine polyglycol ether, and Japanese Patent Application Laid-Open No. 61-275474 discloses a di (higher alkyl) ring. A stable aqueous dispersion for treating textiles containing the formula amine and Bronsted acid is disclosed in JP-A-64-85368.
JP-A-2-14076 discloses a softening composition comprising a dilong-chain alkylamine-anionic surfactant ion-pair complex, a non-silicone wax and a liquid. Softeners containing functional carboxylic acid complexes and fabric conditioning compositions that impart antistatic properties are described.

Furthermore, Japanese Patent Application Laid-Open No. 52-5394 discloses a fabric conditioning composition containing a mono- or di-long-chain alkylalkylenediamine antistatic agent and a quaternary ammonium softener.

These amine-containing softeners are dispersible,
Although the storage stability is relatively good as compared with the softener containing a quaternary ammonium salt, the softness performance is still insufficient.

[0011]

Means for Solving the Problems The present inventors have conducted intensive studies on a softener containing an amine. As a result, a neutralized product or quaternized product of a special (dilong chain type) amine compound has excellent flexibility. In addition, they have found that elasticity (plumpness) can be imparted to clothing, and the present invention has been completed.

That is, the present invention provides the following general formula (A) or
It is intended to provide a liquid softening finish comprising at least one neutralized or quaternized product of the compound represented by (B) as an essential component.

[0013]

Embedded image

Wherein R ¹ , R ² : an alkyl group or hydroxyalkyl group having 1 to 4 carbon atoms R ³ , R ⁴ : a linear or branched chain having 7 to 35 carbon atoms which may be substituted by a hydroxyl group Alkyl or alkenyl group p: an integer of 1 to 3 m, n: an integer of 0 to 3 ].

Typical examples of the amine represented by the general formula (A) or (B) according to the present invention include N, N-dimethyl-2,3
Acylated diamino-propylamine. Although a method for synthesizing such an acylated product is not described in detail here, epichlorohydrin is reacted with N, N-dimethylamine, and a hydroxyl group is brominated with phosphorus tribromide. It is further aminated with ammonium hydroxide. Finally, the desired product can be easily obtained by acylating it with a fatty acid or an ester compound thereof. The fatty acid or its ester compound used in this reaction is generally derived from natural fats and oils such as coconut oil, palm oil, beef tallow, lard oil, rapeseed oil and fish oil, but is chemically derived from octadecanoic acid or hydroxyoctadecanoic acid. May be used. In the general formula (A) or (B), R ¹ and R ² , or R ³ and R ⁴ may be the same or different.

Acids for obtaining the neutralized product of the present invention from the amine represented by the general formula (A) or (B) include inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid, acetic acid, lactic acid, and the like. Examples thereof include organic acids such as glycolic acid, citric acid, maleic acid, fumaric acid, and toluenesulfonic acid. Also, the general formula (A)
Alternatively, examples of the quaternizing agent for obtaining the quaternized amine represented by (B) include alkyl halide compounds such as methyl chloride, and alkyl sulfate compounds such as dimethyl sulfate.

The liquid softening agent of the present invention can be obtained, for example, by slowly adding a melt or a concentrated solution of an amine compound to an aqueous solution containing a neutralizing agent under stirring or shear mixing, but is not limited to this method. However, it is also possible to obtain a neutralized product in advance or to obtain a neutralized product by post-addition.

In the present invention, the acid neutralized product or quaternized product of the amine represented by the general formula (A) or (B) may be used alone or in combination of two or more. The total amount of the composition is 4 to 40% by weight, preferably 6 to 30% by weight, particularly preferably 10 to 30% by weight.

The liquid soft finish of the present invention may be modified with a silicone compound such as dimethylpolysiloxane or dimethylpolysiloxane partially modified with an amino group or a polyoxyalkylene group, particularly preferably partially modified with a polyoxyalkylene group. By blending the dimethylpolysiloxane thus obtained, it is possible to improve the feel of soft-treated clothing without impairing water absorption. These silicone compounds are
It is preferable to add 0.3 to 5% by weight to the entire soft finish.

It is desirable to add 0.05 to 0.4% by weight of an inorganic electrolyte such as sodium chloride, calcium chloride or magnesium chloride to the liquid softener of the present invention for adjusting the viscosity.

[0021] Liquid softener of the present invention has high stability to long-term storage, polyoxyethylene (5-50 moles) for stabilization in more severe storage conditions alkyl or alkenyl (C ₁₂ -C ₂₄₎ ethers or polyoxypropylene (5-50 moles) alkyl or alkenyl (C ₁₂ -C ₂₄₎ nonionic surfactants such as ether, ethanol, propylene glycol, and solvent or urea, such as ethylene glycol and glycerin Can be blended. Further, known esters, nonionic or cationic compounds, long-chain alcohols, long-chain amines, long-chain fatty acids and the like may be used in combination as a soft base.

It is also possible to incorporate a pigment or dye for the appearance of the product, a fluorescent whitening agent for the whiteness of the finished product, and a fragrance for improving the taste at the time of use and after the finished product. The balance of the liquid softener of the present invention is water and optional components.

[0023]

The liquid softening agent of the present invention has a softening effect and an antistatic effect on various fibers which are equal to or higher than those of hardened tallow alkyldimethylammonium chloride which has been widely used in the past, and surprisingly. It has been found that elastic softness can be obtained.

[0024]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. Table 1 shows the compounds used in the examples and comparative examples.

[0025]

[Table 1]

Examples 1 to 9 and Comparative Example 1 1) Evaluation of elasticity (1) Treatment method 2 kg of commercially available cotton towel and 1 kg of acrylic jersey were 3.5 °
Repeatedly wash (30 liter washing machine) 5 times with a commercially available detergent attack (manufactured by Kao Corporation, registered trademark) in DH hard water,
After removing the fiber treating agent attached to each fiber, 1.5 g of a soft finish formulation prepared by dispersing a neutralized product or a quaternized product of the compound shown in Table 1 in water was added in the amount shown in Table 2. twenty five
The mixture was treated under stirring at 1 ° C for 1 minute. (2) Evaluation method The cloth treated by the above method was air-dried indoors, and then left in a constant temperature and humidity room at 25 ° C and 65% RH for 24 hours. These fabrics were evaluated for elasticity.

The elasticity was evaluated by comparing one pair with a cloth treated with 10 cc of a soft finishing agent comprising 15% by weight of dihydrogenated tallow alkyldimethylammonium chloride. The evaluation is expressed as follows. +2; higher elasticity than control +1; slightly higher elasticity than control 0; same as control -1; slightly lower elasticity than control -2; lower elasticity than control As shown in Table 2, the present invention By using the compound of (1), an effect of satisfying elasticity can be obtained.

[0028]

[Table 2]

Examples 10 to 12 and Comparative Example 2 To evaluate the elasticity of the compositions having the compositions shown in Table 3, the pile height of cotton towels was measured. <Evaluation of Elasticity> Cotton towels treated in the same manner as in Examples 1 to 9 and Comparative Example 1 were folded in eight, three sheets were stacked and pressed for 5 minutes at a pressure of 5 g / cm ² . The pressure was removed and the height of the towel was measured. The higher the height of the towel, the better the elasticity.

[0030]

[Table 3]

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-113077 (JP, A) JP-A-4-3332764 (JP, A) JP-A-5-195432 (JP, A) 12203 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 13/46, 13/325

Claims (1)

(57) [Claims] 1. A liquid softener comprising, as an essential component, at least one neutralized or quaternized product of a compound represented by the following general formula (A) or (B). Embedded image [Wherein R ¹ , R ² : an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group R ³ , R ⁴ : a linear or branched alkyl group having 7 to 35 carbon atoms which may be substituted by a hydroxyl group Or an alkenyl group p: an integer of 1 to 3 m, n: an integer of 0 to 3; ]