JP2019060055A - Cleaning finish agent and cleaning agent - Google Patents

Abstract

To provide a cleaning finish agent with low pH while suppressing increase of viscosity and a cleaning method using the cleaning finish agent, for overcoming problems that viscosity of the cleaning finish agent becomes high and workability is deteriorated when pH of general cleaning finish agents containing a cationic surfactant is tried to be reduced, and that load on a pump is increased in the case that viscosity of the cleaning finish agent is high since there are many cases for supplying the cleaning finish agent into a tank by a pump in a business cleaning machine.SOLUTION: A cleaning finish agent contains quaternized article of trialkanolamine fatty acid ester (X) and polycarboxylic acid (Y). Preferably the cleaning finish agent has pH of 1 to 3. Preferably the cleaning finish agent is a cleaning finish agent for business cleaning machine using cleaning water with pH of 10 to 11.SELECTED DRAWING: None

Description

  The present invention relates to laundry finishes and methods of washing.

  When washing using various washing machines, generally, each process is performed in the order of a washing process, a rinsing process, and a finishing process (Patent Document 1). In the finishing step, in order to impart softness to items to be washed such as linen and clothes, a laundry finish containing a cationic surfactant as a main component is used (Patent Document 2).

JP, 2010-214002, A JP, 2017-89068, A

  For example, in the washing step, since alkaline washing water is used for the to-be-washed matter, it is necessary to lower the pH of the to-be-washed matter in the rinsing step and the finishing step performed after the washing step.

  In particular, in the case of using a commercial washing machine such as a continuous washing machine, the process often proceeds from the washing process to the rinsing process and the finishing process without dehydration. That is, the material to be washed is carried to the next step while containing a large amount of washing water used in the washing step. Moreover, in a commercial washing machine, washing water with a high pH which is not used in general homes is used. Therefore, from the viewpoint of sufficiently lowering the pH of the material to be washed, it is preferable that the pH of the laundry finish be sufficiently lower than that used at home.

  However, when the pH of a general laundry finish containing a cationic surfactant is lowered, there is a problem that the viscosity of the laundry finish is increased and the workability is deteriorated. Further, in the case of commercial washing machines, there are many cases in which the laundry finish is supplied into the tank by the pump, so there is also a problem that the load on the pump is increased if the viscosity of the laundry finish is high.

  This invention was made in order to solve the above-mentioned subject, and the purpose is to provide the laundry finish which made pH low, suppressing the increase in viscosity, and the laundry method using the said laundry finish. is there.

  The inventors of the present invention have intensively studied to solve the above-mentioned problems, and as a result, they find that the above-mentioned problems can be solved by using a certain kind of material, and have completed the present invention.

  That is, the laundry finishing agent of the present invention contains a quaternary substance (X) of trialkanolamine fatty acid ester and a polycarboxylic acid compound (Y).

  According to the present invention, the pH can be lowered while suppressing an increase in the viscosity of the laundry finish.

  First, the contents of the embodiment of the present invention will be listed.

  (1) The laundry finishing agent according to the embodiment of the present invention contains a quaternary substance (X) of trialkanolamine fatty acid ester and a polycarboxylic acid (Y). Such a configuration makes it possible to obtain a laundry finish having a low pH and a low viscosity.

  (2) Preferably, the laundry finish has a pH of 1 to 3. Such a configuration can easily lower the pH of the material to be washed.

  (3) Preferably, the laundry finish is a laundry finish for a commercial washing machine in which wash water having a pH of 10 to 11 is used. According to such a configuration, it is possible to finish the object to be washed to a suitable pH in a situation where high pH wash water is used as in the case where a cleaning company uses a commercial washing machine to wash.

  (4) The washing method according to the embodiment of the present invention includes a washing step using washing water of pH 10 to 11, and a washing and finishing including a quaternary compound (X) of trialkanolamine fatty acid ester and a polycarboxylic acid (Y) And a finishing step using an agent. According to such a method, the object to be washed can be finished to a suitable pH in a situation where a high pH washing water is used as in the case where a cleaning company uses a commercial washing machine for washing.

  Hereinafter, embodiments of the present invention will be described in detail.

  The laundry finish in the present embodiment contains a quaternary substance (X) of trialkanolamine fatty acid ester and a polycarboxylic acid (Y).

  The quaternized product (X) of trialkanolamine fatty acid ester can be obtained, for example, by quaternizing ester of trialkanolamine and fatty acid with an alkylating agent.

  Examples of trialkanolamines include, but not limited to, triethanolamine, triisopropanolamine, tri (2-butanol) amine, tri (t-butanol) amine and the like. The trialkanolamine is preferably triethanolamine from the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered.

The fatty acid is not particularly limited, but is preferably a saturated fatty acid having 10 to 26 carbon atoms or an unsaturated fatty acid having 10 to 22 carbon atoms.

As the saturated fatty acid having 10 to 26 carbon atoms, for example, a saturated fatty acid having 10 carbon atoms such as decanoic acid (capric acid), a saturated fatty acid having 12 carbon atoms such as dodecanoic acid (lauric acid), 13 carbon atoms such as tridecanoic acid Saturated fatty acid, saturated fatty acid having 14 carbon atoms such as tetradecanoic acid (myristic acid), disintegrated fatty acid having 15 carbon atoms such as pentadecanoic acid (pentadecyl acid), saturated fatty acid having 16 carbon atoms such as hexadecanoic acid (palmitic acid), C17 saturated fatty acid such as heptadecanoic acid (margaric acid), C18 saturated fatty acid such as octadecanoic acid (stearic acid), C19 saturated fatty acid such as nonadecanoic acid, carbon such as eicosanoic acid (arachidic acid) Number 20 saturated fatty acid, C22 saturated fatty acid such as docosanoic acid (behenic acid), tetracosanoic acid Serine acid) saturated fatty acids 24 carbon atoms such as, include saturated fatty acids having a carbon number of 26 such hexacosanoic acid (cerotic acid). Among them, saturated fatty acids having 10 to 20 carbon atoms are particularly preferred from the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered.

  Examples of unsaturated fatty acids having 12 to 22 carbon atoms include unsaturated fatty acids having 12 carbon atoms such as dodecenoic acid, unsaturated fatty acids having 13 carbon atoms such as tridecenoic acid, and unsaturated fatty acids having 14 carbon atoms such as tetradecenoic acid. C15 unsaturated fatty acids such as pentadecenoic acid, C16 unsaturated fatty acids such as hexadecenoic acid (palmitoleic acid etc.), C17 unsaturated fatty acids such as heptadecenoic acid, octadecenoic acid (oleic acid, vacenic acid Etc.), octadecadienoic acid (such as linoleic acid), octadecatrienoic acid ((9,12,15) -linolenic acid, 6,9,12) -linolenic acid, eleostearic acid etc. Unsaturated fatty acid, C 19 unsaturated fatty acid such as nonadecenoic acid, eicosadienoic acid (such as 8, 11-eicosadienoic acid), Examples thereof include C20 unsaturated fatty acids such as cosatrienoic acid (such as 5, 8, 11-eicosatrienoic acid) and eicosatetraenoic acid (such as arachidonic acid). Among them, unsaturated fatty acids having 16 to 18 carbon atoms are particularly preferable from the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered.

  The alkylating agent is not particularly limited, and alkyl halides such as methyl chloride, ethyl chloride, methyl bromide and methyl iodide, and alkyl sulfates such as dimethyl sulfate, diethyl sulfate and di-n-propyl sulfate, etc. Alkylating agents are included. As the alkylating agent, dimethyl sulfate is preferable from the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered.

  Examples of the polycarboxylic acid (Y) include, but are not limited to, succinic acid, adipic acid, sebacic acid, dodecanedicarboxylic acid, azelaic acid, citric acid, malic acid and agaricic acid. Citric acid or malic acid is preferred as the polycarboxylic acid (Y) from the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered.

  The quaternary compound (X) of trialkanolamine fatty acid ester is represented by the compound represented by the following general formula (1) and the following general formula (2) from the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered. It is particularly preferred to include at least one compound selected from the group consisting of compounds.

However, in the general formula (1), ^{R 1} represents a saturated hydrocarbon group or unsaturated hydrocarbon group having a carbon number of 18 16 to 18 carbon atoms.

Further, in the general formula (2), ^{R 2} represents an unsaturated hydrocarbon group having a saturated hydrocarbon group or a 16 to 18 carbon atoms having 10 to 20 carbon atoms. Each R ² in the general formula (2) may be different from or identical to each other.

  From the viewpoint of suppressing the viscosity even when the pH of the laundry finish is lowered, the laundry finish in the present embodiment has 5 quaternized compounds (X) of trialkanolamine fatty acid ester with respect to 100 parts by mass of the laundry finish. It is preferable to include 25 parts by mass, more preferably 8 to 20 parts by mass, and still more preferably 8 to 15 parts by mass.

  The weight ratio ((X) / (Y)) of the quaternary compound (X) of the trialkanolamine fatty acid ester to the polycarboxylic acid (Y) contained in the laundry finish in the present embodiment is a laundry finish. From the viewpoint of suppressing the viscosity even when the pH is lowered, 0.1 to 5 is preferable, 0.2 to 4 is more preferable, and 0.3 to 3.5 is more preferable.

  To the laundry finish in the present embodiment, various materials added to a general laundry finish such as a fiber lubricant such as a silicone compound, an antibacterial agent, a fragrance and an antifoamer can be added.

  The laundry finishing agent according to the embodiment of the present invention is preferably used in a commercial washing machine that performs a washing process with washing water of high pH, and more preferably used in a continuous washing machine.

  In the continuous washing machine, the washing step, the rinsing step and the finishing step are performed in this order, and then the object to be washed is dewatered by a dehydrator. The washing process includes, for example, a pre-washing process and a main-washing process.

  The continuous washing machine includes, for example, a plurality of tanks (here, the first tank to the thirteenth tank) arranged in a line, and each step is performed using the plurality of tanks in order. Specifically, for example, the first tank and the second tank are used in the pre-washing step, the third tank to the ninth tank are used in the main washing step, and the tenth tank to the twelfth tank are used in the rinsing step, The thirteenth tank is used in the finishing step. The to-be-washed | cleaned material thrown into the continuous washing machine is sent to the tank which adjoins in order from a 1st tank, and reaches a 13th tank through each process.

  Detergent and bleach are added to any of the tanks in which the main washing process is performed. The material to be washed is washed with a liquid in which the detergent and the bleaching agent are diluted with water, that is, washing water. The pH of the washing water is 10-11. The said pH is higher than the wash water used with a washing machine at home. The bleach may not be added.

  Fresh water, i.e. water, is supplied to any of the vessels in which the rinsing step takes place. In addition, washing water moves from the adjacent tank to the tank where the rinsing process is performed along with the object to be washed. By the rinsing step, the pH of the liquid contained in the material to be washed is lowered to 9-7. That is, the to-be-washed | cleaned material of pH 9-7 moves to the 13th tank which performs a finishing process.

  The laundry finishing agent according to the embodiment of the present invention is charged into the thirteenth tank in which the finishing process is performed. The laundry finishing agent according to the embodiment of the present invention has, for example, a pH of 1 to 3. Thereby, pH of the liquid in a 13th tank can be easily adjusted to 6-7 near pH of human skin.

  In addition, although pH of the to-be-washed thing which moves to a 13th tank presupposed that it is 9-7 here, you may be higher.

<Example>
Hereinafter, the laundry finish of the present embodiment will be described in more detail based on Examples and Comparative Examples. The invention is not limited thereby. In the present specification, “parts” and “%” represent “parts by mass” and “% by mass”, respectively, unless otherwise specified.

The material used in an Example and a comparative example is shown.
Cationic surfactant Quaternary of trialkanolamine fatty acid ester (X)
・ Quaternary of triethanolamine fatty acid ester (X-1)
(Trade name: REVOQUAT WE28 SH, manufactured by EVONIK, a compound of the above general formula (2))
・ Quaternary of triethanolamine fatty acid ester (X-2)
(Trade name: REWOQUAT WE 28 E US, manufactured by EVONIK, a compound of the above general formula (1))
Other cationic surfactant (A)
・ Distearyl dimethyl ammonium chloride (A-1)
(Brand name: Cortamine D86P made by Kao Corporation)
· Trioxyethylene methyl ammonium salt methyl sulfate (trade name: Lion softer EQ, manufactured by Lion Corporation) (A-2)
・ Stearic acid dimethylaminopropylamide (A-3)
(Brand name: Parner SDPA-4B, manufactured by Miyoshi Yushi Co., Ltd.)
Polycarboxylic acid (Y)
· Citric acid (Y-1)
・ Malic acid (Y-2)

  Table 1 shows the results of each evaluation, the respective materials used in the manufacture and their blending amounts (the numerical values are parts by mass), the pH, and the laundry finishing agents of Examples 1 to 8 and Comparative Examples 1 to 3, respectively. Show.

(Production of laundry finish)
The materials listed in Table 1 are mixed at 60 ° C. until the cationic surfactant is completely dissolved. The washing and finishing agents thus produced are used to evaluate viscosity and defoaming power.

(viscosity)
The measurement of viscosity measured the laundry finishing agent adjusted to 20 degreeC according to JISZ8803 using BM type | mold viscosity meter (rotor No. 2, rotation speed 60rpm).

(Defoaming power) The defoaming power is an index showing the degree to which the foaming liquid suppresses foaming. The defoaming force is measured by the following procedure. That is, 0.1 g of nonionic surfactant Neugen LP-180 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) is dissolved in 100 ml of 40 ° C. water and poured gently into a 500 ml graduated cylinder so as not to foam. Next, 0.05 g of the laundry finish is placed in the measuring cylinder. Next, air is sent to the liquid in the measuring cylinder for 30 seconds using an air pump and a diffuser stone to try to froth the liquid. Next, turn off the air pump and measure the amount of foam immediately after. Specifically, the amount of foam is measured based on the scale near the upper end of the foam in the measuring cylinder and the scale near the lower end of the foam. As the laundry finishing agent, from the viewpoint of the handleability of the material to be washed, the higher the defoaming power, that is, the smaller the amount of foam, the better. Evaluation criteria are shown below.
A: The amount of foam is less than 100ml
B: The amount of bubbles exceeds 100 ml and less than 300 ml
C: The amount of foam exceeds 300 ml

  As apparent from Table 1, it can be seen that the laundry finishes of Examples 1 to 8 have lower viscosity despite their lower pH than Comparative Examples 2 and 3. Moreover, compared with the comparative example 1, it turns out that pH is low and the defoaming power of the laundry finishing agents of Examples 1-8 is also high.

Claims (4)

  A laundry finish comprising a quaternary ester of trialkanolamine fatty acid ester (X) and a polycarboxylic acid (Y).   The laundry finish according to claim 1, wherein the pH is 1-3.   The laundry finish according to claim 1 or 2, which is a laundry finish for a commercial washing machine in which wash water having a pH of 10 to 11 is used. a washing step using washing water of pH 10-11,
And a finishing step using a laundry finish comprising a quaternary ester of trialkanolamine fatty acid ester (X) and a polycarboxylic acid (Y).