Resin treatment method, cleaning agent composition, and agent for preventing damage to resin

Abstract

To provide a resin treatment method which prevents a resin from being damaged when the resin is treated by bringing a composition containing alkyl glucoside into contact with the resin, a cleaning agent composition which prevents a resin from being damaged without washing with water after cleaning, and a resin damage preventing agent.SOLUTION: A resin treatment method includes bringing a composition containing alkyl glucoside having an average sugar condensation degree of 1.8 or more into contact with a resin, and then allowing the resin to stand.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for treating resins, a detergent composition, and an agent for preventing damage to resins. [Background technology]

[0002] When cleaning the surface of a hard material, it is necessary to thoroughly remove dirt while not damaging the hard material.

[0003] For example, Patent Document 1 describes a liquid cleanser composition for flush toilets that is suitable for cleaning toilet bowls and toilet floors, does not cause cracks in ABS resin toilet seats, and has excellent long-term storage stability, (a) Alkyl glycoside 0.1 to 3.0% by weight (b) 0.05 to 1.0 wt.% of a partially crosslinked polyacrylic acid or its salt, the Brookfield yield value of which in a 0.3 wt.% aqueous solution is 100 g / sec·cm or more (c) Water-insoluble abrasive 1.0 to 20.0% by weight (d) Water remainder A liquid toilet cleanser composition has been proposed which contains as an essential component and has a pH adjusted to 6.0 to 8.0.

[0004] In addition, Patent Document 2 discloses a hard surface liquid detergent composition that does not damage plastics, has excellent detergency, and imparts a desirable gloss to the surface, and (a) 0.01 to 5% by weight of one or more surfactants selected from alkyl glycosides, sugar fatty acid esters, and amphoteric surfactants; (b) 1 to 30% by weight of one or more solvents selected from monohydric alcohols, polyhydric alcohols, and derivatives thereof, each having a vapor pressure of 2 mmHg (20°C) or more; (c) 0.5 to 15% by weight of one or more solvents selected from ethylene glycol, propylene glycol, butanediol, glycerin, and hexylene glycol; A hard surface liquid cleaning composition containing the above has been proposed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 4-96999 [Patent Document 2] Japanese Patent Application Publication No. 3-115497 Summary of the Invention [Problem to be solved by the invention]

[0006] When cleaning areas around water such as bathrooms and toilets, the detergent composition can be rinsed off with water after cleaning, but it is practically difficult to rinse off the detergent composition with water after cleaning flooring, tables, etc. Therefore, it is desired to develop a method for cleaning resins that does not require rinsing off the detergent composition with water after cleaning and that is less likely to damage the resin even if the detergent composition accumulates.

[0007] The present invention has been made in view of the above circumstances, and provides a method for treating a resin in which the resin is hardly damaged when the resin is treated by bringing a composition containing an alkyl glucoside into contact with the resin; a cleaning composition in which the resin is hardly damaged even without being washed away with water after cleaning; and an agent for preventing damage to the resin. [Means for solving the problem]

[0008] As a result of extensive research, the present inventors have found that the above problems can be solved by using a composition containing an alkyl glucoside with a high degree of sugar condensation.

[0009] That is, the present invention relates to a method for treating a resin, which comprises contacting the resin with a composition containing an alkyl glucoside having an average sugar condensation degree of 1.8 or more, and then allowing the resin to stand.

[0010] The present invention also relates to a cleaning composition that does not need to be rinsed off with water after cleaning, which contains an alkyl glucoside having an average sugar condensation degree of 1.8 or more.

[0011] The present invention also relates to an agent for preventing damage to resins, which comprises an alkyl glucoside having an average sugar condensation degree of 1.8 or more. [Effects of the Invention]

[0012] According to the resin treatment method of the present invention, by contacting a resin with a composition containing an alkyl glucoside having an average sugar condensation degree of 1.8 or higher and then allowing the resin to stand, the resin can be effectively cleaned without damaging the resin. Furthermore, since the composition is unlikely to damage the resin, there is no need to rinse it off with water. Therefore, the resin treatment method of the present invention is suitable as a method for cleaning or preventing damage to resin products, such as flooring and tables, for which it is practically difficult to rinse off the cleaning composition with water after cleaning. Furthermore, since the composition is unlikely to damage the resin and there is no need to rinse it off with water, it is useful as a cleaning composition that does not need to be rinsed off with water after cleaning. Furthermore, since alkyl glucosides having an average sugar condensation degree of 1.8 or higher are unlikely to damage the resin, they are useful as agents for preventing damage to resin.

[0013] When conventional alkyl glucosides with a relatively low average sugar condensation degree are used, the hydrophobic group portion of the alkyl glucoside is adsorbed to the resin surface, and the alkyl glucoside penetrates the resin and replaces the plasticizer, resulting in a loss of plasticity and damage to the resin, such as cracking. In contrast, the alkyl glucosides of the present invention with an average sugar condensation degree of 1.8 or more are highly hydrophilic and therefore less likely to be adsorbed to the resin surface, and their large molecular size makes them less likely to penetrate the resin, which is thought to help maintain the plasticity of the resin. Therefore, even if the alkyl glucoside is not washed away with water after contact with the resin, damage such as cracking is less likely to occur to the resin. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be described in detail below.

[0015] The method for treating a resin of the present invention is characterized by contacting a resin with a composition containing an alkyl glucoside having an average sugar condensation degree of 1.8 or more, and then allowing the resin to stand.

[0016] The resin is not particularly limited, and examples thereof include polyolefins such as polyethylene and polypropylene, ABS (acrylonitrile / butadiene / styrene copolymer) resin, polycarbonate, polyester, polyurethane, polystyrene, acrylic resin, polyvinyl chloride, fluororesin, polyamide, polyimide, polyacetal, polysulfone, epoxy resin, melamine resin, phenolic resin, urea resin, and unsaturated polyester resin. Among the above resins, from the viewpoint of significantly achieving the effects of the present invention, preferably one or more selected from ABS resin, polycarbonate, and polystyrene, more preferably ABS resin.

[0017] The alkyl glucoside is a sugar-based nonionic surfactant and is useful as a sustainable surfactant. Furthermore, the alkyl glucoside is less likely to damage resins, and is therefore useful as a resin damage prevention agent. The alkyl glucoside may be used alone or in combination of two or more.

[0018] The alkyl glucoside has an average sugar condensation degree of 1.8 or more, preferably 2 or more from the viewpoint of suppressing damage to the resin, and preferably 10 or less, more preferably 5 or less, even more preferably 3 or less, and even more preferably 2.9 or less from the viewpoint of ease of production.

[0019] The alkyl glucoside can be produced, for example, by a dehydration condensation reaction between a monosaccharide, polysaccharide, or complex sugar having an average sugar condensation degree of 1.8 or more and an alcohol.

[0020] From the viewpoint of suppressing damage to the resin, the alkyl glucoside is preferably an alkyl glucoside represented by the following general formula (1). [ka] (In the formula, R is a hydrocarbon group, G is a residue derived from a reducing sugar having 5 or 6 carbon atoms, and n is the average sugar condensation degree, which is 1.8 or more.)

[0021] In the general formula (1), R represents a hydrocarbon group. The hydrocarbon group is not particularly limited, and examples thereof include a linear or branched alkyl group, a linear or branched alkenyl group, an aryl group, and a hydrocarbon group in which two or more of these groups are bonded. Among these, from the viewpoint of suppressing damage to the resin, a linear or branched alkyl group or a linear or branched alkenyl group is preferred, a linear or branched alkyl group is more preferred, and a linear alkyl group is even more preferred.

[0022] The number of carbon atoms in the hydrocarbon group is not particularly limited, but from the viewpoint of suppressing damage to the resin, it is preferably 10 or more, more preferably 12 or more, and even more preferably 14 or more, and from the viewpoint of ease of production, it is preferably 36 or less, more preferably 28 or less, even more preferably 24 or less, even more preferably 22 or less, even more preferably 20 or less, even more preferably 18 or less, and even more preferably 16 or less.

[0023] When two or more alkyl glucosides having hydrocarbon groups with different carbon numbers are used in combination, the hydrocarbon groups are preferably linear or branched alkyl groups having 10, 12, or 14 carbon atoms, more preferably linear alkyl groups having 10, 12, or 14 carbon atoms, from the viewpoint of preventing damage to the resin and ease of production.

[0024] In the general formula (1), G is a residue derived from a reducing sugar having 5 or 6 carbon atoms. Examples of the reducing sugar include monosaccharides such as glucose, fructose, galactose, xylose, mannose, lyxose, and arabinose, and disaccharide or higher reducing sugars such as maltose, xylobiose, isomaltose, cellobiose, gentiobiose, lactose, sucrose, nigerose, turanose, solanose, raffinose, gentianose, and melezitose. Among these, from the viewpoints of suppressing damage to the resin and easy availability, preferably, one or more monosaccharides selected from glucose, fructose, galactose, xylose, mannose, lyxose, and arabinose are used, more preferably, one or more monosaccharides selected from glucose and fructose are used, and even more preferably, glucose is used.

[0025] In the general formula (1), n ​​is the average sugar condensation degree, which is 1.8 or more. The preferred range of the average sugar condensation degree n is as described above. The average sugar condensation degree n is 1 It can be measured by H-NMR.

[0026] The content of the alkyl glucoside in the composition is not particularly limited, but from the viewpoint of cleanliness, it is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more, and from the viewpoint of suppressing damage to the resin, stickiness, and stains, it is preferably 30% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less.

[0027] The composition can be prepared by mixing the alkyl glucoside with a solvent, such as water, an organic solvent such as alcohol, or a mixture thereof. From the viewpoint of less impact on the human body and the environment, water or a mixture of water and alcohol is preferred, and water is more preferred.

[0028] The composition may contain additives such as surfactants other than the alkyl glucoside, alkali agents, acids, dispersants, fragrances, pigments, dyes, bactericides, preservatives, solubilizing agents, chelating agents, and antioxidants, as necessary.

[0029] The composition does not need to be washed off with water because it is unlikely to damage resins, and is therefore useful as a cleaning composition that does not need to be washed off with water after cleaning.

[0030] The resin treatment method of the present invention includes, for example, a method for cleaning a resin and a method for preventing damage to a resin. The method for contacting the resin with the composition is not particularly limited, and examples thereof include a method of directly applying or spraying the composition onto the resin surface, a method of contacting the resin surface with an impregnated material such as paper, cloth, nonwoven fabric, resin sheet, or sponge impregnated with the composition, and a method of immersing a resin in the composition.

[0031] In the resin treatment method of the present invention, the resin is allowed to stand after contacting the composition with the resin. The standing time is not particularly limited, but may be 5 hours or more, 12 hours or more, 24 hours or more, or 3 days or more, from the viewpoint of preventing damage to the resin. It may also be, for example, 50 years or less, 30 years or less, or 10 years or less. The temperature during standing is not particularly limited, but from the viewpoint of preventing damage to the resin, it is preferably 0°C or more, more preferably 10°C or more, and even more preferably 20°C or more. From the same viewpoint, it is preferably 80°C or less, more preferably 70°C or less, and even more preferably 50°C or less.

[0032] In the resin treatment method of the present invention, the composition that has come into contact with the resin may be left to dry (left to stand) without being washed off with water, or may be wiped off with an absorbent material such as paper, cloth, nonwoven fabric, resin sheet, or sponge, or may be washed off with a solvent other than water (such as alcohol). Preferably, the composition is wiped off with an absorbent material without being washed off with water. The absorbent material may contain water. In the present invention, the embodiment in which the composition is wiped off with a water-containing absorbent material is not the same as the embodiment in which the composition is washed off with water. From the viewpoint of simplicity, the composition is preferably wiped off with a dry absorbent material. The composition that has come into contact with the resin may be wiped off before or after being left to stand. The composition may remain on the resin after wiping, but even if it remains, it will not damage the resin.

[0033] Examples of resin products to which the resin treatment method of the present invention can be applied include flooring, tables, chairs, toilets, bathtubs, and resin parts for vehicles such as automobiles. [Example]

[0034] The present invention will be described in detail below based on examples. Unless otherwise specified in the tables, the content of each component is expressed in mass %, and various measurement and evaluation methods are as follows.

[0035] <Synthesis of alkyl glucoside> Manufacturing Example 1 (Synthesis of alkyl glucoside 1) Decyl alcohol, dodecyl alcohol, and tetradecanol (mass ratio 6:3:1) (5 equivalents), anhydrous glucose (1 equivalent), and paratoluenesulfonic acid monohydrate (0.35 mol%) were placed in a reactor and stirred. The temperature was raised to 105°C, and the internal pressure was adjusted to 35 mmHg to initiate the dehydration reaction. Nitrogen was blown into the reactor at 20 mL / min (per 1 L vessel) to remove the water produced. The dehydration reaction was continued until the conversion rate, calculated from the glucose consumption, reached 99.9% or higher. After the reaction was completed, the vacuum was released, the temperature was lowered to 80°C, and sodium hypophosphite was added in the form of an aqueous solution in an amount of 1.65 equivalents relative to the paratoluenesulfonic acid. The system was heated to 180°C and the vacuum was lowered to 1 mmHg to distill off the unreacted alcohol. When the distilled alcohol amount was 89% of the raw alcohol, the vacuum was released, and the acid catalyst was neutralized with sodium hydroxide (decyl alcohol solution). Steaming was continued until the residual alcohol content was 1% or less, and alkyl glucoside 1 was obtained.

[0036] Manufacturing Example 2 (Synthesis of alkyl glucoside 2) A dehydration reaction was carried out in the same manner as in Production Example 1, except that decyl alcohol, dodecyl alcohol, and tetradecanol (mass ratio 3:4:3) (5 equivalents) were used. After the reaction was completed, the vacuum was released, the temperature was lowered to 80°C, and 0.8 equivalents of sodium hydroxide relative to the paratoluenesulfonic acid were added in the form of an aqueous solution. The mixture was heated to 120°C and 1 mmHg under reduced pressure, and the unreacted alcohol was distilled off. When the amount of alcohol distilled off was 80% of the starting alcohol, the vacuum was released, and the acid catalyst was neutralized with sodium hydroxide (decyl alcohol solution). Steaming was continued until the residual alcohol content was 1% or less, yielding alkyl glucoside 2.

[0037] Manufacturing Example 3 (Synthesis of alkyl glucoside 3) Alkyl glucoside 3 was obtained in the same manner as in Production Example 2, except that dodecyl alcohol was used and the amount of alcohol distilled off was 82% of the starting alcohol.

[0038] Production Example 4 (Synthesis of alkyl glucoside 4) Alkyl glucoside 4 was obtained in the same manner as in Production Example 1, except that dodecyl alcohol was used and the amount of alcohol distilled off was 93% of the starting alcohol.

[0039] <Preparation of Detergent Composition> Examples 1 to 5, Comparative Examples 1 to 3 The alkyl glucosides 1 to 4 synthesized in Production Examples 1 to 4, alkyl glucoside 5 (Glucopon 215UP, manufactured by BASF), alkyl glucoside 6 (Glucopon 425N / NH, manufactured by BASF), and alkyl glucoside 7 (Glucopon 600CSUP, manufactured by BASF) were mixed with water in the blending ratios shown in Tables 1 and 2 to prepare cleaning agent compositions.

[0040] <Method for measuring average sugar condensation degree> The average sugar condensation degree of alkyl glucosides 1 to 7 was measured by solid phase extraction under the following conditions after removing polysaccharides. 1 Calculated by H-NMR. (Solid phase extraction analysis method) After conditioning with methanol and ion-exchanged water, 2 mL of sample was charged, and sugar components were eluted with 10 mL of 5% acetonitrile solution, followed by 10 mL of methanol to elute alkyl glucosides. Each solution was transferred to a test tube, dried under nitrogen flow, and then the mass was measured. Column: InertSep C18 2000mg (GL Science) Sample: 2% by mass (dissolved in 5% by mass acetonitrile aqueous solution) ( 1 H-NMR analysis method) Measurement was performed using nuclear magnetic resonance spectroscopy (NMR) under the following conditions, and the average sugar condensation degree was calculated based on the peaks in the resulting chart. Equipment: Mercury 400BB (400 MHz, Varian) Observation width: 6410.3Hz Data points: 64K, Pulse width: 45μS, Pulse delay time: 10 seconds, Number of integrations: 64 Measurement temperature: room temperature, spin: x16, solvent: pyridine-d5 (a few drops of DO added) Condensation degree calculation method: {(number of protons adjacent to oxygen atoms appearing between 3.5 and 5.3 ppm / number of protons in alkyl moieties appearing between 0 and 2.0 ppm) - 2} / 7

[0041] <Method for evaluating resin damage> Test solutions were prepared by preparing aqueous solutions (pH: 6 to 8) containing 30% by mass of each of alkyl glucosides 1 to 7. The pH was adjusted using 1N HCl and 10% by mass Na2CO3 aqueous solution. An ABS test piece (70 mm x 10 mm x 1 mm) manufactured by Nippon Test Panel Co., Ltd. was immersed in the test solution under the following two conditions. Condition A: The ABS test piece was placed in a 5.8 mm wide beaker, bent so that it touched the bottom, and immersed in the test solution to a height of 20 mm. It was then left to stand at 20°C for 1 hour and then placed in a thermostatic chamber at 50°C for 24 hours. It was then removed and bent in half by hand. Condition B: The ABS test piece was placed in a glass tube so that the bent part was at an angle of 30°, immersed in the test solution to a height of 20 mm, left to stand at 20°C for 1 hour, and then left to stand in a thermostatic bath at 50°C for 120 hours. After that, the piece was removed and bent in half by hand. Based on the degree of cracking in the bent portion, the damage to the resin was evaluated according to the following criteria. 1: No cracks at all 2: Slight cracks 3: Cracks between 1mm and 3mm 4: Cracks of 3mm or more

[0042] <How to evaluate cleanliness> 0.3 mL of the prepared cleaning composition was sprayed onto the oil stain using a sprayer, and the oil stain was wiped off with dry kitchen paper, and the removal rate (%) of the oil stain was measured.

[0043] [Table 1]

[0044] [Table 2] [Industrial Applicability]

[0045] The resin treatment method, cleaning composition, and resin damage prevention agent of the present invention are useful for cleaning resin products such as flooring, tables, chairs, toilets, bathtubs, and resin parts of vehicles such as automobiles.

Claims

1. A method for treating a resin, comprising contacting an ABS resin with a composition containing an alkyl glucoside represented by the following general formula (1), allowing the ABS resin to stand, and then wiping off the composition that has come into contact with the ABS resin with a dry absorbent material: 【Chemistry 1】 (In the formula, R is a linear alkyl group having from 10 to 14 carbon atoms, G is a residue derived from a reducing sugar having from 5 or 6 carbon atoms, and n is the average sugar condensation degree, which is from 2.0 to 2.9.)

2. The method for treating a resin according to claim 1 , wherein the standing time is 5 hours or more.

3. 3. The method for treating a resin according to claim 1, wherein the composition is brought into contact with the ABS resin by bringing an impregnating material impregnated with the composition into contact with the surface of the ABS resin.

4. The method for treating a resin according to any one of claims 1 to 3, wherein the method for treating a resin is a method for cleaning a resin.

5. The method for treating resin according to any one of claims 1 to 3, wherein the method for treating resin is a method for preventing damage to resin.

6. A detergent composition containing an alkyl glucoside represented by the following general formula (1): A cleaning composition comprising contacting the cleaning composition with an ABS resin, allowing the ABS resin to stand, and then wiping the composition that has come into contact with the ABS resin with a dry absorbent material. 【Chemistry 2】 (In the formula, R is a linear alkyl group having from 10 to 14 carbon atoms, G is a residue derived from a reducing sugar having from 5 or 6 carbon atoms, and n is the average sugar condensation degree, which is from 2.0 to 2.9.)

7. A resin damage prevention agent comprising an alkyl glucoside represented by the following general formula (1): A damage prevention agent for resin, which comprises contacting the damage prevention agent with ABS resin, allowing the ABS resin with the damage prevention agent to stand, and then wiping the damage prevention agent that has come into contact with the ABS resin with a dry absorbent material. 【Transformation 3】 (In the formula, R is a linear alkyl group having from 10 to 14 carbon atoms, G is a residue derived from a reducing sugar having from 5 or 6 carbon atoms, and n is the average sugar condensation degree, which is from 2.0 to 2.9.)

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