JPS617397A - Additive for granular detergent - 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] Production! The present invention relates to additives for granular detergents, and particularly to additives used in granular detergents containing anionic surfactants.

Come on! Technical Supervisor: Usually, when washing clothes at home to make them softer,
After washing with detergent, rinse off the detergent ingredients with plenty of water,
After that, a cationic surfactant such as a quaternary ammonium salt is used as a main component. A method of processing by adding a softening agent has been adopted.

This is because, although cationic surfactants have excellent softening effects and antistatic effects, they cannot provide sufficient softening effects when used together with detergents. The reason for this is that household detergents generally have anionic surfactants as their main ingredient, so when cationic surfactants are added during washing, the anionic surfactants in the detergent are This is because they lose their ionicity and become dispersed and stabilized, making it difficult for them to be absorbed by clothing.

However, performing washing and softening separately requires extra time and effort, and consumers are demanding detergents that combine cleaning and softening.

Conventionally, it has been proposed to granulate a cationic surfactant with an inorganic or organic salt or an organic dispersion inhibitor as a method of adding a cationic surfactant at the same time as washing to give a sufficient softening effect to clothing ( Japanese Patent Publication No. 36-8927, U.S. Patent No. 4,073,735, Japanese Patent Publication No. 55-86
895, JP-A-53-41312, JP-A-49-984
03).

Furthermore, as a further improvement technique, it has been proposed to incorporate nonionic cellulose derivatives (Japanese Patent Application Laid-open No.
9-6293).

Problem 11 that Hatsu Parts aims to solve: However, in the method of granulation using inorganic salts as shown in Japanese Patent Publication No. 36-8927, although a softening effect is recognized for synthetic fibers, it is not effective for softening cotton. was insufficient.

Furthermore, although the method described in JP-A-59-6293 can impart flexibility to cotton, it is necessary to use a large amount of softening ingredients in order to obtain a sufficient effect.
In practical terms, further improvements were to be made.

The present invention was made to solve the problems of the prior art as described above, and it is possible to perform a soft finish at the same time as cleaning, and is also excellent for cotton fabrics. An object of the present invention is to provide an additive for granular detergents having a softening effect.

That is, the granular detergent additive of the present invention has the following (a)
and (b) component in weight ratio (a)/(b)”99.9
It is characterized by containing in the range of 10.1 to 75/25.

(a) Cationic surfactant represented by the following general formula (I) (wherein R1, R, are Cx x ''-Cz a (7) 7
/L/ represents a kyl group, represents R3°, or halogen, C
H, So4. C, H, So, or (b) the following general formula (
The acrylamide-based polymer represented by It) is 1000 or more. ) Specific examples of the cationic surfactant as component (a) include distearyldimethylammonium salt, dihydrogenated beef tallow alkyldimethylammonium salt, distearylmethylbenzylammonium salt, and the like. Further, specific examples of halogen as a counter ion include chloride and bromide.

The acrylamide polymer of component (b) includes acrylamide polymer (Rs: H) and methacrylamide polymer (R5: CHl), and specific examples of R, and R7 include hydrogen, -CH3, -C2H, and CH(CHa).
)2, -C(C:H,)3, -〇, Hl,, -C(C
Alkyl groups such as H,)2 CH, C(CH,)3; -
CH20H1-CH2CH20H.

-CHx CH, CH, OR5-CH(CHa)CH,
Hydroxyalkyl group such as OR; CH20C4H
g, CHz OCa H4(CH-)2, -C(CH3
), CH, C0CH.

Examples include substituted alkyl groups such as.

Further, n is 1000 or more, preferably 10.00
It is 0 or more.

The weight ratio of component (a) and component (b) is (a) / (b)
:99.910.1 to 1/1, preferably 99/1 to 75/25. This ratio is 99.
If it is smaller than 910.1, the softening effect on cotton cloth will not be significant, and if it is larger than 1/1, the dissolution and dispersibility of the particles will deteriorate.

It is preferable that component (a) and component (b) are uniformly mixed. A suitable mixing method is to disperse the cationic activator in an organic solvent or water, mix it with a 10% or less aqueous solution of an acrylamide polymer, and thoroughly mix the mixture using a kneader or the like. This liquid mixture can be dried by spray drying, or may be dried by heating and reducing pressure while mixing in a kneader. Of course, any method that allows uniform mixing may be used. For example, the cationic surfactant does not necessarily have to be in the form of a solution; a cationic surfactant powder (purity of 90% or more) may be melted and mixed with a heated aqueous acrylamide solution.

Alternatively, the acrylamide polymer may be pulverized and added to a solution or melted cationic surfactant.

The granular detergent additive of the present invention can be produced by an appropriate granulation method.
It is preferable that the particles have an average particle diameter of 500 μm or less.

If the particle size is large, not only will it be difficult to uniformly impart a softening effect to the items to be washed, but also the additive particles may adhere to the items to be washed as they are at the end of washing, which is undesirable.

Note that if the particle size is too small, such as 100 μm or less, caking of the detergent may occur. At this time, it is appropriate to add the fine powder after agglomerating it using an appropriate inorganic coating agent.

By pre-mixing and granulating the cationic surfactant and the acrylamide polymer, the adsorption to the fabric to be washed, especially cotton fabric, during washing can be dramatically improved. Therefore, even when used in the presence of an anionic surfactant, the flexibility-imparting effect inherent to a cationic surfactant can be exhibited.

As described above, the granular detergent additive of the present invention is particularly effective when added to detergents containing anionic surfactants, and is conveniently used by being blended into detergents in advance. In this case, the granular detergent additive is added in an amount of 0.1 to 20% based on the amount of cationic surfactant to the detergent composition.
It is appropriate to mix wt%, preferably 0.5 to 1
It is 0wt%. Of course, they may be stored separately from the detergent composition and individually added to the washing liquid during washing. Also,
It can also be used alone without using detergent.

The additive for granular detergents of the present invention can impart flexibility to cotton fabrics at the same time as cleaning them.

A solution of 75 wt% dihydrogenated beef tallow alkyldimethylammonium chloride (Alucard 2 HT) and 25 wt% isopropyl alcohol and a 2% acrylamide polymer aqueous solution were mixed at 40°C and then dried under reduced pressure at 50°C. The dried product was made into particles of 250 μm or less using a pulverizer.

The above operations were repeated to prepare granular detergent additives having various acrylamide polymers and blending ratios shown in Table 1.

These additives were blended as a cationic surfactant at 3vt% into a granular detergent having the composition shown below. Further, as a control, only dihydrogenated beef tallow alkyldimethylammonium chloride was similarly blended (Nα1 in Table 1). These compositions were washed and their softening effects on cotton fabrics were measured and are shown in Table 1.

Acid soda (C12 alkyl) 20wt%
Sodium silicate 10wt%
Soda carbonate 10vt% zeolite (A-type zeolite, average particle size 2μm) 15
vt% carboxymethyl cellulose 0.6
vt% soap (beef tallow fatty acid) 0
．． 7vt% polyethylene glycol (molecular weight 6000)
0.5vt% soda citrate
0.8wt% fluorescent agent 0.5wt
% Fragrance 0.2v
t% Sodium sulfate, water Balance Softness/Efficacy Test Method Nylon tricot cloth (30 denier) 30g
x4 pieces acrylic jersey cloth 90g
x2 cotton towels 80g
2 pieces of bleached cotton cloth 50gX4
Cotton knitted cloth 85gX4
A test cloth consisting of a sheet is washed for 15 minutes using the above granular detergent and tap water at 60'C, and then rinsed three times for 3 minutes each using tap water at 60C to pre-treat the test cloth. Next, this test cloth was placed in a jet-type household electric washing machine, and a detergent concentration of 0 was applied using a composition (&1 to 9 in Table 1) containing the above-mentioned granular detergent with each additive (&1 to 9 in Table 1) and tap water at 25°C. .13%, bath ratio 3
After washing for 10 minutes under 0x conditions and dehydrating for 1 minute,
Rinse with tap water at ℃ for 3 minutes and dehydrate for 1 minute.
Repeated times. Thereafter, the test fabric was air-dried for 24 hours, and then the air-dried test fabric was conditioned at 25° C. and 65% RH.

A cotton towel was taken out from the test fabric thus obtained, and its feel was judged by five judges, and the flexibility imparting effect of the additive composition was evaluated based on the average of the five judges. The feel was evaluated based on the following criteria and compared with the feel of a cotton towel obtained by the same procedure as above except that a detergent containing no additives was used.

Extremely soft 5 points Quite soft 4 points Soft
3 points Slightly soft
2 points Slightly soft 1 point (blank below) Table 1: Cationic surfactant/polyacrylamide polymer ratio (a)/(b)

Claims (1)

[Claims] 1. (a) A cationic surfactant represented by the following general formula (I), ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (However, R_1 and R_2 are C_1_2 to C_2_6. Represents an alkyl group, R_3 and R_4 represent an alkyl group of C_1 to C_4, a benzyl group, a hydroxyalkyl group of C_3 to C_4 or a polyoxyalkylene group, X is a halogen, CH_3SO_4, C_2H_5SO_4 or (b) Acrylamide polymer represented by the following general formula (II) ▲ Numerical formula, chemical formula, table, etc. are available ▼ (II) (However, R_5 is hydrogen or a methyl group, and R_6 and R_7 are Hydrogen, a substituted alkyl group such as an alkyl group or a hydroxyalkyl group, which may be the same or different. n is 1000 or more.) and the weight ratio (a)/(b) = 99.9/ 0.1~1
A granular detergent additive characterized in that the additive is contained in a ratio of /1.