JP2017206597A - Water-repellent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel water-repellent composition having excellent fast-acting properties.SOLUTION: A water-repellent composition contains a water-repellent polymer and a solvent for the water-repellent polymer. The solvent is a C7 aliphatic hydrocarbon. Based on the total amount of the water-repellent composition, the contents of the water-repellent polymer and the solvent are 0.5-1.5 mass% and 89.0-99.5 mass%.SELECTED DRAWING: None

Description

  The present invention relates to a water-repellent composition.

  Conventionally, water repellent sprays have been used to impart water repellency to textiles such as clothing, bags, shoes, or leather products. As water-repellent compositions used in water-repellent sprays, for example, Patent Documents 1 and 2 disclose water-repellent compositions containing a silicone-based substrate and specific hydrocarbons.

JP 2008-150498 A JP2011-219601A

  In a scene where a general consumer goes out or rains immediately before going out, the water repellent composition is required to have a characteristic (that is, rapid effect) that quickly exhibits water repellency after use. However, there are currently no reported examples of water-repellent compositions excellent in rapid efficacy.

  An object of the present invention is to provide a novel water-repellent composition having excellent rapidity.

  One aspect of the present invention is a water-repellent composition containing (A) a water-repellent polymer and (B) a solvent for the water-repellent polymer, wherein (B) the solvent is an aliphatic hydrocarbon having 7 carbon atoms. Based on the total amount of the water-repellent composition, the contents of (A) the water-repellent polymer and (B) the solvent are 0.5 to 1.5% by mass and 89.0 to 99.5% by mass, respectively. A water-repellent composition is provided.

  In the water-repellent composition according to the present invention, the water-repellent polymer may be a silicone compound and / or a fluorinated polymer.

  The water repellent composition according to the present invention may further contain (C) a solubilizer.

  Another aspect of the present invention provides a water-repellent spray having a spray container and the water-repellent composition contained in the spray container.

  ADVANTAGE OF THE INVENTION According to this invention, the water-repellent composition excellent in rapid effect is provided. The water-repellent composition of the present invention exhibits rapid action not only when the target fiber product or leather product is dried but also when it contains moisture. Moreover, the water-repellent composition of the present invention can suppress discoloration of the target product.

  Hereinafter, embodiments for carrying out the present invention will be described in detail.

  The water-repellent composition according to the present embodiment comprises (A) a water-repellent polymer (hereinafter sometimes abbreviated as “(A) component”) and (B) a solvent for the water-repellent polymer (hereinafter referred to as “(B) component”. The component (B) is an aliphatic hydrocarbon having 7 carbon atoms, and the content of the component (A) and the component (B) is within a predetermined range. It is characterized by being.

  In the water repellent composition according to this embodiment, the component (A) is a water repellent polymer. In the present specification, the “water-repellent polymer” refers to a polymer having a property of repelling water droplets on the surface, and the contact angle is preferably 60 ° or more (more preferably 90 ° or more). The component (A) may be any polymer that has water repellency and is soluble in the component (B). Examples thereof include silicone compounds and fluorinated polymers.

  The silicone compound is a compound having a siloxane bond (Si—O—Si), and polyorganosiloxane is typical.

  Examples of the polyorganosiloxane include polydimethylsiloxane and polymethylphenylsiloxane. The polyorganosiloxane may have a functional group such as an unsaturated bond or an amino group.

  The silicone compound may be used in combination with a metal alkoxide such as titanium alkoxide, or an alkoxysilane such as dialkoxydialkylsilane or trialkoxyalkylsilane.

  Although the average molecular weight of a silicone compound can be suitably determined according to the chemical structure of a silicone compound, it is preferable that it is a molecular weight which can be melt | dissolved or disperse | distributed to (B) component.

  Examples of the fluorinated polymer include a copolymer of (a) a fluorinated (meth) acrylic compound and (b) a non-fluorinated (meth) acrylic compound. Here, “(meth) acrylic compound” means a compound having an acryloyl group or methacryloyl group, and “(meth) acrylate” means acrylate or methacrylate, respectively, and similar compounds are understood in the same manner.

  (A) The fluorinated (meth) acrylic compound refers to a compound in which at least a part of hydrogen atoms of the (meth) acrylic compound is a fluorine atom. For example, fluoroalkyl (meth) acrylate (preferably perfluoroalkyl ( (Meth) acrylate) and N-alkylperfluoroalkylsulfonamidoalkyl (meth) acrylate (preferably N-methylperfluorooctylsulfonamidoethyl (meth) acrylate).

  Examples of (b) non-fluorinated (meth) acrylic compounds include alkyl (meth) acrylates. Carbon number of the alkyl group in alkyl (meth) acrylate may be 1-22, and it is preferable that it is 1-18.

  (A) A component may be used individually by 1 type and may be used in combination of 2 or more type.

  Content of (A) component in the water repellent composition which concerns on this embodiment is 0.5-1.5 mass% on the basis of the total amount of a water repellent composition. In this case, the content of the component (A) is calculated as a non-volatile content (solid content) equivalent. The content of the component (A) is preferably 0.7 to 1.5% by mass and more preferably 0.8 to 1.0% by mass from the viewpoint of more prominently achieving the effects of the present invention. preferable.

  In the water repellent composition according to this embodiment, the component (B) is an aliphatic hydrocarbon having 7 carbon atoms.

  The C7 aliphatic hydrocarbon may be a saturated hydrocarbon or an unsaturated hydrocarbon, but is preferably a saturated hydrocarbon. Examples of the saturated hydrocarbon having 7 carbon atoms include n-heptane, 2-methylhexane, 3-methylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3. -Dimethylpentane, 3-ethylpentane, 2,2,3-trimethylbutane. Among these, n-heptane is preferable.

  (B) A component may be used individually by 1 type and may be used in combination of 2 or more type.

  The content of the component (B) in the water repellent composition according to this embodiment is 89.0 to 99.5% by mass based on the total amount of the water repellent composition. The content of the component (B) is preferably 91.0 to 99.5% by mass and more preferably 92.0 to 99.5% by mass from the viewpoint of more prominently achieving the effects of the present invention. preferable.

  The water-repellent composition according to this embodiment may further contain (C) a solubilizer (hereinafter sometimes abbreviated as “component (C)”). In the present specification, the “solubilizing agent” means a solvent having an effect of easily dissolving the water-repellent polymer in the solvent. When the water repellent composition further contains the component (C), the water repellent polymer is more easily dissolved in the solvent, and the water repellent polymer is stabilized in the solvent. As the component (C), a solvent capable of dissolving or dispersing the component (A) is used. Examples of such a solvent include lower alcohol, acetone, methyl ethyl ketone, methyl acetate, and ethyl acetate.

  Examples of the lower alcohol include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, and tert-butanol.

  The solubilizer is preferably ethanol, n-propanol, isopropanol, acetone, or ethyl acetate, more preferably ethanol, n-propanol, or isopropanol, and still more preferably isopropanol.

  (C) A component may be used individually by 1 type and may be used in combination of 2 or more type.

  When the water-repellent composition according to this embodiment contains the component (C), the content of the component (C) in the water-repellent composition is that of the water-repellent composition from the viewpoint of more prominently achieving the effects of the present invention. Based on the total amount, for example, it may be 10% by mass or less, preferably 8.0% by mass or less, and more preferably 7.0% by mass or less.

  The water-repellent composition according to this embodiment can contain various additives in addition to the above-described components as long as the effects of the present invention are not impaired. Examples of the additive include a fragrance, a texture adjusting agent, and an ultraviolet absorber.

  The water-repellent composition according to this embodiment can be produced by introducing other components into the solvent. For example, it can be produced by mixing a water-repellent polymer, a solvent, and, if necessary, a solubilizer while being heated or pressurized as necessary.

  As a usage form of the water-repellent composition according to the present embodiment, for example, the water-repellent composition can be used by attaching it to the surface of the target product. Examples of the method of attaching the water repellent composition to the surface of the target product include a method of filling the spray container with the water repellent composition and spraying the surface of the target product.

  The water repellent spray according to this embodiment has a spray container and a water repellent composition accommodated in the spray container.

  As the spray container, one having a strength that does not cause leakage of the water-repellent composition to be contained and does not deform due to pressure even when a propellant or the like is introduced is used. Specific examples include aerosol spray containers, trigger spray containers (direct pressure type or pressure accumulation type), and dispenser spray containers.

  When filling an aerosol spray container with a water-repellent composition, LPG (liquefied petroleum gas), dimethyl ether, carbon dioxide gas, nitrogen gas, or the like can be used as a propellant. These propellants may be used alone or in combination of two or more. As the propellant, carbon dioxide is preferable because it is nonflammable and changes in particle diameter due to temperature are small.

  As a method for producing a water-repellent spray according to the present embodiment, for example, when the spray container is an aerosol spray container, the water-repellent composition is placed in an aerosol can, closed and then filled with a propellant. be able to. When the spray container is a trigger spray container or a dispenser spray container, a water-repellent spray can be produced by filling the spray container with the water-repellent composition as it is.

  Hereinafter, the present invention will be described in detail based on examples. In addition, this invention is not limited to a following example.

1. Preparation of water-repellent composition and water-repellent spray Polyorganosiloxane (X-61-684B, manufactured by Shin-Etsu Chemical Co., Ltd.) and n-heptane were added to isopropanol in the container, and then stirred at room temperature. The water-repellent compositions of the examples and comparative examples shown were prepared. In addition, the unit of each component in Table 1 is mass%.
Each water-repellent composition (120 g) prepared above was placed in an aerosol can and then filled with carbon dioxide (5 g) to prepare a water-repellent spray corresponding to each water-repellent composition.

2. Evaluation (2-1) Rapid effect of water repellency performance Attached white cloth for test 100% cotton (Kanakin No. 3, JIS L0803 compliant) Cut out to 20 × 20 cm size as a test piece, The test piece after spraying the water-repellent composition (4-5 g) in the prepared water-repellent spray so as to be uniform and naturally drying for 1 minute at room temperature (temperature 25 ° C., humidity 60%). Was subjected to a water repellency test based on the JIS L1092 spray test. The state of the test piece at this time was visually observed, and the rapid effect of water repellency was evaluated according to the following criteria.
(Double-circle): The outstanding water-repellent performance is recognized.
○: Excellent water repellency is recognized.
Δ: Water repellency is recognized.
X: Water repellency is not recognized.

(2-2) Discoloration of fabric and leather Attached white cloth for test 100% polyester fabric (conforming to JIS L0803) and cowhide (brown with gloss) cut to a size of 6 x 7 cm were used as test pieces. The water-repellent composition (0.3 g) in the water-repellent spray prepared above was sprayed so as to be only in the central part and dried at room temperature. The state of the test piece at this time was visually observed, and the discoloration (color fading, etc.) of the fabric and leather was evaluated according to the following criteria.
A: Appearance change is not recognized.
○: Almost no change in appearance.
Δ: Some change in appearance is observed, but there is no practical problem.
×: Appearance change is recognized

  The evaluation results of (2-1) and (2-2) are shown in Table 1.

(2-3) Immediate effect of water-repellent performance in wet fabric Attached white fabric for testing 100% wool (conforming to JIS L0803) fabric cut out to a size of 20 x 20 cm is used as a test piece, and the whole is ion-exchanged After spraying water (3-3.5 g) by spraying, the test piece dried at room temperature (temperature 25 ° C., humidity 60%) for 10 minutes, 15 minutes or 20 minutes, The water-repellent composition (4-5 g) in the water-repellent spray used in Example 3 was sprayed uniformly and dried naturally at room temperature (temperature 25 ° C., humidity 60%) for 1 minute. The later test piece was subjected to a water repellency test based on the JIS L1092 spray test. The state of the test piece at this time was visually observed, and the rapid effect of water repellency was evaluated according to the following criteria.
(Double-circle): The outstanding water-repellent performance is recognized.
○: Excellent water repellency is recognized.
Δ: Water repellency is recognized.
X: Water repellency is not recognized.

  The evaluation results of the above (2-3) are shown in Table 2.

The water-repellent composition of each Example had an excellent rapid effect of exhibiting water-repellent performance even in a natural drying time of 1 minute, and was able to suppress discoloration of the fabric and leather after drying. Moreover, even if it was the cloth | dough of the wet state, it became a quick effect. On the other hand, in the water-repellent composition of Comparative Example 1 containing 2.0% of the component (A) in terms of solid content, discoloration of the fabric and leather was observed, the component (B) was 84.0%, (C) In the water-repellent composition of Comparative Example 2 containing 15.0% of the component, quick action was not obtained and discoloration of the leather was observed.

Claims (4)

A water repellent composition comprising a water repellent polymer and a solvent for the water repellent polymer,
The solvent is an aliphatic hydrocarbon having 7 carbon atoms;
The water repellent composition, wherein the content of the water repellent polymer and the solvent is 0.5 to 1.5 mass% and 89.0 to 99.5 mass%, respectively, based on the total amount of the water repellent composition. .   The water repellent composition according to claim 1, wherein the water repellent polymer is a silicone compound and / or a fluorinated polymer.   The water-repellent composition according to claim 1 or 2, further comprising a solubilizer. The water-repellent spray which has a spray container and the water-repellent composition as described in any one of Claims 1-3 accommodated in this spray container.