CN1079823C - Liquid detergent composition - Google Patents

Abstract

The present invention provides a liquid detergent composition which has excellent fatty stain removal ability and excellent storage stability. The above liquid detergent composition comprises:

(a) polyoxyethylene alkyl ethers containing an alkyl group derived from a primary alcohol,

(b) Polyoxyethylene alkyl ethers containing an alkyl group derived from a secondary alcohol. as well as

(c) a solvent,

Wherein (a)/(b) weight ratio is 10/1-1/10.

Description

liquid detergent composition

[Field of invention]

The present invention relates to a liquid detergent composition for clothing, and more particularly to a liquid detergent composition suitable for clothing, when the composition is applied directly to particularly soiled parts of clothing, regardless of No matter how hard the washing water is, it has excellent cleaning power and strong decontamination effect, and it has low viscosity and is very convenient to use.

[Description of related technologies]

Generally, households use weak alkaline detergents to wash clothes repeatedly, and liquid detergents and soaps are directly applied to the stained parts to wash long-lasting stains on shirt collars and cuffs. However, even with the cleaning method as described above, the phenomenon of gradual fading and yellowing of clothes, especially white underwear, occurs frequently every day. This is because a human body fat component enters the cotton fiber and is not completely removed by normal washing, but gradually accumulates and is oxidized, eventually leading to fading and yellowing. This denatured fatty stain can be removed by applying liquid detergent or soap and washing, or by professional washing. However, good results cannot be obtained in terms of labor and cost.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a liquid detergent composition for laundry having an extremely strong greasy stain removal capability.

[Overview of the invention]

The present inventors have made various studies, and as a result surprisingly found that the above object can be achieved, and a very convenient liquid detergent composition can be obtained by adding polyoxyethylene prepared from ethylene oxide to a primary alcohol. Alkyl ethers and polyoxyethylene alkyl ethers obtained by adding ethylene oxide to secondary alcohols are mixed in a specific mixing ratio and prepared by adding a solvent to complete the present invention.

That is to say, the present invention provides a kind of liquid detergent composition, it comprises:

(a) a polyoxyethylene alkyl ether obtained by adding an average of 5 to 15 moles of ethylene oxide to a primary alcohol containing 8 to 16 carbon atoms,

(b) polyoxyethylene alkyl ethers obtained by adding an average of 5 to 15 moles of ethylene oxide to secondary alcohols containing 8 to 16 carbon atoms, and

(c) A solvent.

The total weight of component (a) and component (b) accounts for 20%-60% (weight) of the composition and the weight ratio of (a)/(b) is 10/1-1/10. [Detailed description of the invention]

The liquid detergent composition for laundry of the present invention will be described in detail below.

The nonionic surfactant of component (a) of the present invention is derived from primary alcohol, and it is that average 5～15 moles of ethylene oxide (hereinafter referred to as EO) are added in the primary alcohol with 8～16 carbon atoms A material obtained is preferably a polyoxyethylene alkyl ether prepared by adding 7 to 12 moles of EO to a primary alcohol having 10 to 14 carbon atoms. More than 16 carbon atoms in the alkyl group will cause a decrease in detergency, while less than 8 will also cause a decrease in detergency. Adding the average molar number of EO over 15 not only destroys the stability of the composition at low temperature, but also reduces the detergency. Adding the average number of moles of EO of less than 5 cannot give a sufficient cleaning effect.

The nonionic surfactant of component (b) of the present invention is derived from secondary alcohol, and it is a kind of material obtained by adding an average of 5 to 15 moles of EO into secondary alcohols with 8 to 16 carbon atoms, more preferably A polyoxyethylene alkyl ether prepared by adding an average of 7 to 12 moles of EO to secondary alcohols with 10 to 14 carbon atoms. Deviations from these ranges cause the same problems as those described above.

In the present invention, the weight ratio of the two nonionic surfactants of components (a) and (b) is 10/1 to 1/10, preferably (a)/(b) is 3/1 to 1/5 . The weight ratio exceeding 10/1 increases viscosity and reduces ease of use. Meanwhile, a weight ratio of less than 1/10 may reduce detergency.

Component (a) and component (b) are incorporated into the composition at a ratio of 20% to 60%, preferably 30% to 60% (by weight) of the composition in total.

Even if the nonionic surfactant concentration of component (a) and component (b) contained in the composition is as high as 20% to 60% (weight), the liquid detergent composition of the present invention can also be mixed stably without causing Gelling or increased viscosity. In addition, the present invention provides excellent detergency.

Furthermore, a solvent is added as component (c) to the liquid detergent composition of the present invention. Such solvents include ethanol, isopropanol, butanol, propylene glycol, ethylene glycol, and polypropylene glycol. A compound represented by the following formula (I) can also be used as the solvent:

[Wherein R ¹ represents a linear or branched chain alkyl group containing 1 to 4 carbon atoms, an allyl group, a benzyl group or a phenyl group; R ² represents hydrogen or a methyl base group; and x represents a number from 1 to 10].

The compound represented by the above-mentioned formula (I) is preferably used as the solvent used in the present invention. Among them, the product of formula (I) in which ^R is a phenyl group and ^R is hydrogen is particularly preferred for cleaning fatty stains.

The production method of the compound represented by the above-mentioned formula (I) is not particularly limited, and includes wherein the solvent is optionally selected from those solvents in which x in formula (I) are 1 to 3, respectively, and x is 4 to 10, preferably is those solvents of 4 to 6, and the method of mixing the solvents in a ratio satisfying the above numerical conditions, or wherein an alkylene oxide compound such as ethylene oxide and 1,2-propylene oxide is combined with a compound having 1 to 4 carbon atoms A method of reacting lower alcohols, benzyl alcohol or phenol in the presence of a basic catalyst such as sodium hydroxide and potassium hydroxide. Preferably component (c) of formula (I) is a mixture of compounds of formula (I) and x values which differ from one another. Preferably component (c) comprises a compound having an x value of 0 and an x value of 10 or greater in an amount of not more than 5% by weight, more preferably not more than 1% by weight.

Component (c) is incorporated into the composition at a rate of 0.1-30% by weight, preferably 1%-30% by weight, more preferably 10-20%. The incorporation of component (c) can provide a liquid detergent with more excellent cleaning ability and very convenient use.

The liquid detergent composition of the present invention comprises the above-mentioned components (a) to (c) as essential components and the balance of water and optional components.

In the present invention, surfactants other than components (a) and (b) may also be incorporated. Nonionic surfactants include polyoxyethylene alkylphenyl ether, polyoxypropylene alkyl ether, polyoxypropylene alkenyl ether, polyoxybutylene alkyl ether, polyoxybutylene alkenyl ether, sucrose fatty acid Esters, fatty acid monoglycerides, higher fatty acid alkanolamides, polyoxyethylene higher fatty acid alkanolamides, amine oxides and alkyl glucosides, preferably the alkyl glucosides represented by the following formula (II):

R ³ (OR ⁴ ) _x G _y (II)

[wherein R ³ represents a linear or branched alkyl group, an alkenyl group or an alkylphenyl group with an average of 8 to 18 carbon atoms; R ⁴ represents a group with an average of 2 to 4 an alkylene group of carbon atoms; G represents a residue derived from a reducing sugar having 5-6 carbon atoms; x is a number of 0-6 on average; and y is a number of 1-10 on average.

Anionic surfactants include alkylbenzene sulfonates, alkyl or alkenyl ether sulfates plus alkylene oxides, fatty acid salts, olefin sulfonates and alkane sulfonates. Particularly preferred are alkylbenzene sulfonates in which the alkyl group has an average of 8 to 20 carbon atoms, and alkyl ether sulfates in which the alkyl group has an average of 8 to 20 carbon atoms, wherein the alkyl group has an average of 8-20 carbon atoms and ethylene oxide are added to polyoxyethylene alkyl ether sulfate with an average molar number of 1-6, and fatty acid salts with an average of 10-18 carbon atoms. The counterions that make up the salts of these anionic surfactants include alkali metal ions such as sodium and potassium, ammonium and alkanolamines such as monoethanolamine, diethanolamine and triethanolamine. The above-mentioned anionic surfactants may be used alone or in combination of two or more.

Furthermore, the addition of cationic surfactants makes it possible to provide softness or good touch. The cationic surfactant may be incorporated in any proportion as long as the effects of the present invention are not hindered. Generally, they are incorporated in a proportion of 0.1% to 5% by weight.

As long as the effect of the present invention is not hindered, as other surfactants, amphoteric surfactants such as, for example, alkylcarbobetaines (alkylcarbobetaines), alkylsulfobetaines, alkylhydroxysulfobetaines, alkylamides, etc. Hydroxysultaines, Alkylamidoamine Betaines and Alkylimidazoline Betaines.

An alkaline agent is incorporated into the liquid detergent compositions of the present invention. The alkaline agent to be incorporated is not particularly limited and includes alkanolamines such as monoethanolamine, diethanolamine or triethanolamine, ammonia, N-alkylalkanols, N-aminoalkylalkanolamines, and dialkylene base triamine. Of these, alkanolamines and ammonia are preferred, and monoethanolamine, diethanolamine, and triethanolamine are particularly preferred in terms of soil removal. These alkaline agents can be used alone or in combination of two or more. The alkaline agent is blended in a proportion of 1%-20% (weight) to control the pH value of the composition between 6-12, particularly preferably 7-11.

Other optional components include aminopolyacetates such as nitrilotriacetate, ethylenediaminetetraacetate, iminodiacetate, diethylenetriaminepentaacetate, ethylene glycol Etherdiaminetetraacetate, hydroxyethyliminodiacetate and triethylenetetraminehexaacetate, as well as polyacrylates, polycis-butylene as organic polycarboxylic acids with the ability to replenish divalent metals Elenate, malonate, succinate, diglycolate, malate, tartrate and citrate, etc. Sodium citrate or monoethanolamine salts are more preferred. In addition, as long as the performance of the composition of the present invention is not hindered, polymers such as salts of high molecular compounds, including polyvinylpyrrolidone having the ability to inhibit recontamination, polyethylene glycol with an average molecular weight of 5,000 or more, may also be incorporated. Diol, a maleic anhydride-diisobutylene copolymer, a maleic anhydride-methyl vinyl ether copolymer, a maleic anhydride-isobutylene copolymer, a maleic anhydride A condensate of butenedioic anhydride-vinyl acetate copolymer and an aqueous formaldehyde solution of naphthalenesulfonate. Also, enzymes such as protease, lipase, and cellulase, enzyme stabilizers such as calcium chloride and magnesium sulfate, fluorescent dyes such as Chinopearl CBS (manufactured by Chiba Geigy Co., Ltd.), and general stabilizers in liquid detergents can be incorporated. regular spices.

The liquid detergent composition for laundry of the present invention is characterized in that it exhibits excellent fatty stain removal effect by coating and detergency by conventional washing method in washing, and is also excellent in convenience of use.

[Example]

The present invention is explained below with reference to Examples, but the present invention is not limited to these Examples.

Example 1

The liquid detergent compositions shown in Table 1 were prepared, and the viscosity of each composition was measured.

Viscosity at 20° C. under the conditions of No. 2 spindle, 60 revolutions/min, and 60 seconds was measured using an AB type viscometer (PVM-B type digital viscometer manufactured by Tokyo Keiki Co., Ltd). The results are shown in Table 1.

The following substances were used as component (a) and component (b).

• Nonionic surfactant a ₁ : prepared by adding an average of 10 moles of EO to a linear primary alcohol having 12 carbon atoms.

• Nonionic surfactant a ₂ : prepared by adding an average of 12 moles of EO to a linear primary alcohol with 12 carbon atoms.

• Nonionic surfactant b ₁ : prepared by adding an average of 7 moles of EO to straight-chain secondary alcohols with 12 to 14 carbon atoms.

·Nonionic surfactant b ₂ : prepared by adding an average of 12 moles of EO to straight-chain secondary alcohols with 12 to 14 carbon atoms.

                                                          

1 2 3 4 5 6 7 8 1 component (a) nonionic surfactant a ₁ 40 40 10 10 nonionic surfactant a ₂ 40 40 10 10 40 component (b) nonionic surfactant b ₁ 10 10 30 30 10 Nonionic surfactant b ₂ 10 10 30 30 Component (c) Formula (I) compound R ¹ : phenyl group 20 20 20 20 10 10 10 10 -R ² : Hx: 3 water B ^* B ^* B ^* B ^* B ^* B * B ^* B ^* B ^* B ^* evaluation result viscosity (cp.20 ℃) 126 132 130 140 140 130 160 160 <1000B ^* : used to adjust the total amount to 100 balance (apply below same notation)

Example 2

The liquid detergent compositions shown in Table 2 were prepared using the nonionic surfactant a ₂ and the nonionic surfactant b ₁ used in Example 1, and the following tests were carried out.

(1) Prepare manually soiled cloth to evaluate degreasing power

200 grams of triolein was dissolved in 80 liters of Perclene and a #2003 cloth was soaked in it and soiled with triolein. The Perclene was then dried off to produce an artificially soiled cloth.

(2) Method for evaluating degreasing power

The aforementioned manually soiled cloths were cut into a size of 5 cm x 5 cm, and 0.2 g of the present detergent composition was applied to an area of 2 cm x 2 cm on each manually soiled cloth. Then, a set of five cloths was rotated in a Turgotometer at 100 rpm and washed under the following conditions.

Washing conditions:

Washing time: 10 minutes

Water hardness: 4°

Rinse: Rinse with city water for 5 minutes

After washing, the portion of the soiled cloth on which the present detergent composition had been applied was cut out exactly 2 cm x 2 cm, and a set of five cloths was subjected to Soxhlet extraction for 12 hours using chloroform as a solvent. Unwashed artificially soiled cloths were also cut out 2 cm x 2 cm, and the extraction was performed in the same manner. The chloroform in the extract was removed by an evaporator to determine the amount of triolein extracted. The degreasing rate is determined by the following formula:

Degreasing rate (%)=[(extraction amount of unwashed dirty cloth-extraction amount of washed dirty cloth)/unwashed

      Extraction amount of polyester dirty cloth] × 100

(3) Storage stability test

The compositions in Table 2 were stored at 40°C and -5°C for 20 days respectively, and the phenomena of separation, turbidity and precipitation were observed. The evaluation criteria are as follows:

○: No separation, turbidity and precipitation occurred at both 40°C and -5°C.

×: Separation, turbidity and precipitation occurred at 40°C or -5°C.

                                                       

9 10 11 12 13 14 15 16 17 2 3 4 5 Component (a): Nonionic Surfactant a ₂ 40 15 10 10 4 10 10 10 15 50 2 2 Component (b): Nonionic Surfactant b ₁ 10 15 10 25 36 20 20 20 15 50 40 28 Component (c): Formula (I) compound structure: R ¹ : Ph Ph Ph Ph Ph Ph Ph Bz Bz C ₄ H ₉ - - Ph Ph

R ² : H H H H H CH ₃ H CH ₃ H - - H H

x: 3 3 3 3 3 3 3 3 2 - - 3 3 Blending amount 20 10 10 10 10 10 10 10 10 - - 5 10 Alkyl Glucoside ^* - - 10 - - - - - - - - - - Single Ethanolamine 4 4 4 4 4 4 4 4 4 - 4 4 4 Ethanol 2 2 2 2 2 2 2 2 2 2 2 2 2 Propylene Glycol 1 1 1 1 1 1 1 1 1 1 1 1 1 Water B B B B B B B B B B B B B Evaluation Results Degreasing Rate (% ) 85 75 76 76 72 75 73 72 68 55 58 60 60 Stability ○ ○ ○ ○ ○ ○ ○ ○ ○ × × ○ ○ (Visual inspection)

^* : Alkyl glucoside, wherein R ³ is an alkyl group with 8 to 16 carbon atoms, x is 0; y is 13; G is formula (II)

Glucose residues in .

Ph: phenyl group

Bz: benzyl group

Claims (2)

1. liquid detergent composition is characterized in that comprising:

(a) by average 5～15 moles of ethylene oxide are joined the Voranol EP 2001 that makes in the primary alconol with 8～16 carbon atoms,

(b) by being added, average 5～15 moles of ethylene oxide have the Voranol EP 2001 that makes in the secondary alcohol of 8～16 carbon atoms, and

(c) be selected from the solvent of compound of ethanol, Virahol, butanols, propylene glycol, 1,2 ethylene glycol, polypropylene glycol and following formula (I) expression:

R wherein ¹Represent a straight or branched alkyl group, an allyl group, a benzyl group or a phenyl group with 1～4 carbon atom; R ²Expression hydrogen or a methyl group; Represent one 1～10 number with x,

Wherein the total amount of component (a) and component (b) accounts for 20%～60% (weight) in composition, and (a)/(b) weight ratio is 10/1～1/10, and the content of component (c) is 0.1～30% weight, and surplus is water and optional components.

2. the described composition of claim 1, wherein R ¹Represent a benzyl group or a phenyl group.