JPH0715116B2 - Liquid detergent composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a liquid detergent composition, and more specifically, to a liquid detergent composition containing a specific strongly electrolytic surfactant and hydroxypropylmethylcellulose, which has excellent stability. Has, and gives the foam creaminess and smoothness, and the foam has a good hold,
The present invention relates to a cleaning composition that suppresses the residual feeling (stickiness) after rinsing.

[Conventional technology and its problems]

Conventionally, alkanolamides of fatty acids, monoglycerides, and various ionic polymers have been used as foam modifiers of liquid detergents. However, if these are not added in a large amount, they have no effect, and if they are added in an amount sufficient to exert an effect, there is a problem that the feeling after washing is heavy or they are sticky.

In addition, nonionic polymers such as polyethylene oxide,
There are problems such as poor low temperature stability in a strong electrolyte surfactant.

[Means for solving problems]

The inventors of the present invention have improved such conventional problems and made a foamy and creamy foam with a good stickiness after washing, and in particular, with regard to hair, eliminate the entanglement of hair during washing and smooth after rinsing. The purpose of this study was to give a serious consideration. As a result, they have found that the specific hydroxypropylmethyl cellulose has excellent low-temperature stability even in the presence of a strong electrolyte surfactant, and a sufficient amount of foam can be obtained with a small amount. That is, it has been found that by blending hydroxypropyl methylcellulose, a finely textured and smooth foam can be obtained, and a liquid detergent composition having a smooth feel after rinsing can be obtained.

That is, the present invention provides the following components (A) and (B) (A) the following formula (I): (Wherein the molecular end and R are either a hydrogen atom, a methyl group or a hydroxypropyl group), and the methoxy group content is 25
~ 35% by weight, hydroxypropoxy group content 5 ~ 15
% By weight, and the viscosity of the 2% by weight aqueous solution at 20 ° C. is 50%.
~ 2,000 centipoise hydroxypropylmethylcellulose 0.1-2% by weight, (B) a straight or branched chain alkyl or alkenyl group having an average carbon number of 10-20, and having an average of 0.5-8 mol ethylene in one molecule. Oxide, propylene oxide, butylene oxide, Alkyl or alkenyl ether sulfate alkali metal added with ethylene oxide and propylene oxide in the ratio of 0.1 / 9.9 to 9.9 / 0.1 or ethylene oxide and butylene oxide in the ratio of 0.1 / 9.9 to 9.9 / 0.1 The present invention provides a liquid detergent composition containing 2 to 50% by weight of salt as an essential component.

The hydroxypropylmethyl cellulose used as the component (A) of the present invention has a structural unit represented by the general formula (I), and preferably has an average molecular weight of
It ranges from 20,000 to 70,000.

This hydroxypropylmethyl cellulose can be synthesized by a known method, or can be obtained as a commercial product.

This hydroxypropyl methylcellulose is 2% by weight
20% by using BM viscometer
It has a viscosity of 50 to 2,000 centipoise (CPS) when measured at 30 ° C. and 30 rpm. By the way, the average molecular weight of about 20,000 for 50 CPS and about 7 for 2,000 CPS.
It is 0,000. If it is 50 CPS or less, a sufficient foam-modifying effect is not observed, and if it is 2,000 CPS or more, the solubility becomes poor.

Further, the hydroxypropylmethyl cellulose is one in which a part of the hydroxyl groups of cellulose is substituted with a methoxy group or a hydroxypropoxy group, and the content ratio of the methoxy group is 25 to 35% in hydroxypropylmethylcellulose.
Preferably, the content of 27-32% hydroxypropoxy groups is 5-15%, preferably 7-13%. The degree of substitution of these is about 1.5 to 2.0, that is, 3 contained in 1 unit of glucose.
Of these hydroxyl groups, about 1.5 to 2.0 are substituted. Hydroxypropylmethyl cellulose out of this range has poor solubility and low temperature stability even when the viscosity of a 2% aqueous solution at 20 ° C. is 50 to 2,000.

The hydroxypropylmethyl cellulose is most suitable in terms of the stability at low temperature in the interior and the foam-modifying effect, and the most suitable one is a methoxy group content of 28 to 30%, a hydroxypropoxy group content of 7 to 12%, and a viscosity of a 2% aqueous solution at 20 ° C. Hydroxypropylmethyl cellulose having an average molecular weight of about 400 (average molecular weight of about 40,000) (Metroses 60SH, Shin-Etsu Chemical) can be mentioned.

Further, the component (B) has a linear or branched alkyl group or alkenyl group having an average carbon number of 10 to 20, and has an average of 0.5 to 8 mol of ethylene oxide, propylene oxide, and butylene oxide in one molecule. Ethylene oxide and propylene oxide in the ratio of 0.1 / 9.9 to 9.9 / 0.1 or ethylene oxide and butylene oxide in the range of 0.1 to 9.9
Alkali metal salt of alkyl or alkenyl ether sulfate added at a ratio of 9.9 / 0.1.

That is, the alkali metal salts of these anionic surfactants, especially the sodium salts thereof, are one of the most preferable bases for liquid detergents, but since they are strong electrolytes, nonionic polymers such as polyethylene oxide are used to improve foaming. Even if added as a denaturing agent, salting-out occurred, the effect of improving foam quality was not obtained, and stable formulation was impossible. However, the component (A) of the present invention, the hydroxypropyl methylcellulose, is based on the above-mentioned strong electrolyte as well as a liquid electrolyte based on a weak electrolyte such as an alkanolamine salt of an anionic surfactant. It can be incorporated into a liquid detergent and has an excellent foam-modifying effect.

The detergent composition of the present invention is prepared according to a conventional method by blending the component (A) in an amount of 0.1 to 2% by weight (hereinafter simply referred to as%) and the component (B) in an amount of 2 to 50%.

The detergent composition of the present invention includes, in addition to the above essential components, propylene glycol, glycerin, a dissolving agent such as urea, which is used as a blending component of a known detergent composition, ethanol, inorganic salts, higher alcohols, poly Viscosity adjusting agents such as acrylic acid, other fragrances, dyes, ultraviolet absorbers, antioxidants, anti-dandruff agents, bactericides, preservatives and the like can also be added.

〔The invention's effect〕

The detergent composition of the present invention has both excellent detergency due to a strong electrolyte and excellent foaming properties due to hydroxypropylmethyl cellulose. Therefore, it can be advantageously used as a shampoo, a skin cleanser, a dishwashing detergent, and the like.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to examples. In addition, in the following experiment, the liquid detergent was evaluated as follows. In addition, the amounts of the components are shown by weight% of the effective content.

(1) Solubility, low-temperature stability: A liquid detergent composition was prepared by a conventional method, and the state of the liquid immediately after preparation was judged as "solubility" according to the following criteria, and -5.
The state when stored at 0 ° C. for 1 day was similarly judged and shown as “low temperature stability”.

Evaluation content ○: Transparent and uniform.

Δ: Somewhat opaque, or a small amount of precipitate was present.

X: A large amount of precipitate or phase separation is observed.

(2) Slip of foam, creaminess, and stickiness after rinsing: Wet 30 g of human hair with water at 40 ° C., and add 20 g of water. It was then washed using 1 g of the above liquid detergent composition and the foam slippage during cleaning, creaminess and non-stickiness after rinsing were compared with a control shampoo (without hydroxypropylmethylcellulose in each experiment). ,
Sensory evaluation was performed.

Evaluation content ○: Clearly superior to the control shampoo.

Δ: Slightly superior to the control shampoo.

X: Same as control shampoo.

Example 1 A liquid detergent composition (shampoo) was prepared using hydroxypropylmethylcellulose having various viscosities, and its solubility and foam slip were evaluated. The results are shown in Table 2. The hydroxypropylmethyl cellulose used had a methoxy group content and a hydroxypropoxy content of 29% and 9.5%, respectively.

(Composition) Polyoxyethylene (3) Sodium lauryl sulfate 15% Hydroxypropyl methylcellulose (Table 2) 0.5 Lauric acid diethanolamide 3 Ion-exchanged water balance Example 2 A liquid detergent composition (shampoo) having the composition shown in Table 2 was prepared and its performance was evaluated organoleptically.

The results are also shown in the table.

Claims (1)

[Claims] 1. The following components (A) and (B) (A) the following formula (I): (Wherein the molecular end and R are either a hydrogen atom, a methyl group or a hydroxypropyl group), and the methoxy group content is 25
~ 35% by weight, hydroxypropoxy group content 5 ~ 15
% By weight, and the viscosity of the 2% by weight aqueous solution at 20 ° C. is 50%.
~ 2,000 centipoise hydroxypropylmethylcellulose 0.1-2% by weight, (B) a straight or branched chain alkyl or alkenyl group having an average carbon number of 10-20, and having an average of 0.5-8 mol ethylene in one molecule. Oxide, propylene oxide, butylene oxide, Alkyl or alkenyl ether sulfate alkali metal added with ethylene oxide and propylene oxide in the ratio of 0.1 / 9.9 to 9.9 / 0.1 or ethylene oxide and butylene oxide in the ratio of 0.1 / 9.9 to 9.9 / 0.1 A liquid detergent composition containing 2 to 50% by weight of salt as an essential component.