JP2001131530A - Thickening, gelling or solidifying agent for water and/or alcohol - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thickening, gelatinizing or solidifying agent for water and/or alcohol capable of uniformly thickening, gelatinizing or solidifying the water and/or alcohol and consisting of (A) N-vinylacetamide-based resin powder and (B) a water soluble organic solvent and/or liquid state surfactant not dissolv ing or hardly swelling the N-vinylacetamide-based resin powder, and provide a method for uniformly dispersing the N-vinylacetamide-based resin powder. SOLUTION: This thickening, gelatinizing or solidifying agent for the water and/or alcohol is obtained by including (A) N-vinylacetamide-based resin powder and (B) a water soluble organic solvent and/or liquid state surfactant not dissolving or hardly swelling the N-vinylacetamide-based resin powder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to (A) N-vinylacetamide resin powder, (B) a water-soluble organic solvent and / or a liquid organic solvent in which the N-vinylacetamide resin powder does not dissolve or hardly swell. Thickening of water and / or alcohol, characterized by comprising a surfactant,
The present invention relates to a method for thickening, gelling or solidifying a gelling or solidifying agent and water and / or alcohol, and is particularly characterized in that thickening, gelling or solidifying can be easily and uniformly performed.

[0002]

2. Description of the Related Art Conventionally, when an N-vinylacetamide resin powder is added to water or alcohol to thicken, gel, or absorb and solidify, particularly when the particle diameter is small, a uniform powder is obtained. Dispersion of the powder in water and / or alcohol requires strong stirring, and when stirring is insufficient, the dispersion becomes uneven and uniform dissolution thickening, swelling gelation, solidification cannot be achieved, or is extremely long. It took time, and it was not easy to uniformly thicken, gel, or absorb and solidify the fine powder of the N-vinylacetamide resin.

A thickening, gelling, and liquid-absorbing solidifying agent using N-vinylacetamide resin powder is disclosed in
In JP-A-504, there is a description as a waste liquid treating agent, but it is directly introduced into a liquid for solidifying the N-vinylacetamide-based resin powder, and is uniformly thickened, gelled, or solidified by liquid absorption according to the present invention. No effort has been made.

Japanese Patent Application Laid-Open Nos. Hei 7-163648 and Hei 10-128107 describe a method for preventing non-uniform gelation and liquid absorption when using N-vinylacetamide resin powder. However, any of these methods is a method of blending a powder other than the N-vinylacetamide-based resin powder with the N-vinylacetamide-based resin powder, and does not mention a method of dispersing the powder in a liquid as in the present invention.

The composition of the N-vinylacetamide resin powder of the present invention and a water-soluble organic solvent and / or a liquid surfactant is disclosed in JP-A-6-346041.
-The description of vinylacetamide resin and polyhydric alcohol composition is found, but the polyhydric alcohol used therein dissolves N-vinylacetamide resin,
On the other hand, the water-soluble organic solvent and the liquid surfactant used in the present invention do not dissolve or strongly swell the N-vinylacetamide resin powder, and are essentially different inventions.

Japanese Unexamined Patent Publication (Kokai) No. 2-18487 discloses a thickening, gelling, and liquid-absorbing solidifying agent for water, which uses a natural water-soluble polymer, duran gum. And other natural macromolecules are obtained from natural products, so their quality is not stable, and if not highly refined, phenomena such as contamination by contaminants and degradation by impurities will occur, and they will also have a unique odor. There are drawbacks such as having. Further, there is used a sequestering agent in order to obtain a uniform dispersion at the time of adding duran gum, but the water-soluble organic solvent and the liquid surfactant according to the present invention are not essential components.

Further, gelling of alcohol and solidifying agent for absorbing liquid are described in JP-A-8-231942, in which a dialkyl urea derivative is used, which is a water-soluble organic solvent and a liquid. No surfactant is used as an essential component.

[0008]

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, (A) N-vinylacetamide resin powder, (B) a water-soluble organic solvent and / or a liquid It has been found that by using a composition comprising a surfactant, the thickening, gelling or solidification of water and / or alcohol can be carried out very easily and uniformly.

[0009]

That is, the present invention relates to the following items. (1) (A) N-vinylacetamide resin powder,
(B) thickening of water and / or alcohol characterized by containing a water-soluble organic solvent and / or a liquid surfactant that does not dissolve or hardly swell the N-vinylacetamide resin powder; Gelling or solidifying agent. (2) When the N-vinylacetamide resin is a water-soluble N-
The thickening, gelling or solidifying agent for water and / or alcohol according to the above (1), which is a vinylacetamide resin. (3) The thickening, gelling or solidifying agent for water and / or alcohol according to the above (1), wherein the N-vinylacetamide-based resin is an N-vinylacetamide-based crosslinked resin. (4) The thickening, gelling or solidifying agent for water and / or alcohol according to any one of the above (1) to (3), wherein the water-soluble organic solvent is polyethylene glycol or polypropylene glycol. (5) The thickening, gelling or solidifying agent for water and / or alcohol according to any one of the above (1) to (4), wherein the liquid surfactant is liquid at 10 to 20 ° C. (6) The thickening, gelling or solidifying agent for water and / or alcohol according to any one of the above (1) to (5), wherein at least one nonionic surfactant is used as the liquid surfactant. . (7) (A) N-vinylacetamide resin powder;
(B) The ratio of a water-soluble organic solvent and / or a liquid surfactant that does not dissolve or hardly swell the N-vinylacetamide resin powder is 1:99 to 50:
50. The thickening, gelling or solidifying agent for water and / or alcohol according to any one of the above (1) to (6), which is 50.

(8) The thickening, gelling or solidifying agent for water and / or alcohol according to any one of the above (1) to (7), which further comprises (C) water. (9) (C) The thickening, gelling or solidifying agent for water and / or alcohol according to (8), wherein the content of water is 2 to 10% by mass relative to the total composition. (10) The (A) N-vinylacetamide resin powder is converted to (B) N using the thickener, gelling or solidifying agent for water and / or alcohol according to any of (1) to (7) above. Water and / or alcohol in which a vinylacetamide resin powder is dispersed in a water-soluble organic solvent and / or liquid surfactant which does not dissolve or hardly swell, and then the mixture is added to water and / or alcohol Thickening, gelling or solidifying method. (11) Using the thickening, gelling or solidifying agent for water and / or alcohol according to (8) or (9) above,
(A) N-vinylacetamide resin powder is mixed with (B) N-
The vinylacetamide-based resin powder is dispersed in a water-soluble organic solvent and / or a liquid surfactant that does not dissolve or hardly swell, and (C) water, and then the mixture is added to water and / or alcohol. And / or a method for thickening, gelling or solidifying alcohol.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The N-vinylacetamide resin used in the present invention has the following general formula (I)

[0012]

Embedded image

A (co) polymer of N-vinylacetamide with a homo- or copolymerizable comonomer represented by the formula:

In the present invention, copolymerizable comonomers include, for example, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (Meth) acrylate, 2-ethylhexyl (meth) acrylate, acrylonitrile, vinyl acetate, (meth) acrylamide, (meth) acrylic acid and salts thereof, N-vinylformamide, N-methylvinylformamide, N-methylvinylacetamide, N -Vinylpyrrolidone, vinylsulfonic acid, acrylamidomethylpropanesulfonic acid and salts thereof, and these comonomers, N-
Binary or multi-component copolymers with vinylacetamide monomers can be used.

When an N-vinylacetamide resin is used as a thickener, the N-vinylacetamide resin is preferably water-soluble. In the present invention,
"Water-soluble" means that the resin can be dissolved in water. When the resin is added to water in an amount of 0.2% by mass and appropriately stirred at around room temperature, the resin is uniformly dissolved in water within 24 hours. To become a clear solution.

Further, when an N-vinylacetamide resin is used as a gelling agent or a solidifying agent,
It is preferable to use a vinylacetamide-based crosslinked resin. In addition, an N-vinylacetamide-based crosslinked resin having a small particle diameter can be used as a thickener, and is particularly suitable for thickening that requires thixotropic properties.

The N-vinylacetamide resin powder of the present invention is a powder of the above-mentioned N-vinylacetamide resin, and the particle size of the powder is not particularly limited. But usually
When used as a thickening, gelling, and solidifying agent, it is useful to increase the dissolution rate and swelling rate of the resin. For this purpose, it is effective to reduce the particle size of the powder. As mentioned above, when the particle diameter is small, the dispersion tends to be uneven due to insufficient stirring during dispersion. Also, in the case of a powder having a relatively large particle diameter of several mm,
If the powder has a wide particle size distribution and contains a powder having a small particle size, it tends to be non-uniform when dispersed. Therefore, the present invention is particularly effective for these powders (small particle size powder, powder having a wide particle size distribution), and can be effectively used for powders having a particle size from submicron to several mm.

In the present invention, the N-vinylacetamide-based cross-linking resin is used in the presence of a cross-linking agent having two or more polymerizable double bonds in one molecule in the presence of N-vinylacetamide (and, if desired, other comonomers). ) Is (co) polymerized and cross-linked resin, or a non-cross-linked precursor polymer resin is manufactured in advance,
This is a resin produced by a method of forming a chemical bond by reacting it with a functional group in a polymerized resin, a method of crosslinking with radiation, peroxide, or the like.

Examples of the crosslinking agent having two or more polymerizable double bonds in one molecule used for crosslinking include tetraallyloxyethane, pentaerythritol tetraallyl ether, pentaerythritol triallyl ether,
Derived from compounds having two or more hydroxyl groups in one molecule, such as trimethylolpropane triallyl ether, ethylene glycol diallyl ether, diethylene glycol diallyl ether, triethylene glycol diallyl ether, diallyl ether, monosaccharides, disaccharides, polysaccharides, and cellulose. Polyallyl ethers: triallyl trimellitate, triallyl citrate, diallyl oxalate,
Polyallyl esters derived from compounds having two or more carboxyl groups in one molecule such as diallyl succinate, diallyl adipate and diallyl maleate; two allyl groups in one molecule such as diallylamine and triallyl isocyanurate Compounds having two or more vinyl ester structures in one molecule, such as divinyl oxalate, divinyl malonate, divinyl succinate, divinyl glutarate, divinyl adipate, divinyl maleate, divinyl fumarate, and trivinyl citrate. A bis (N-vinylcarboxylic acid amide) compound such as N, N'-butylenebis (N-vinylacetamide), N, N'-diacetyl-N, N'-divinyl-1,4-bisaminomethylcyclohexane; , N'-methylenebisacrylamide, ethylene glycol Multiple acrylamide structures such as (meth) acrylate, diethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, and (meth) acryl groups Any known crosslinking agent such as divinylbenzene, divinyl ether, allyl (meth) acrylate and the like can be used. In addition, one or more of these crosslinking agents can be used.

The amount of the crosslinking agent to be used is preferably 10% by mass or less, more preferably 6% by mass or less, based on the total amount of the polymerizable monomer containing N-vinylacetamide.

The crosslinking agent capable of forming a chemical bond by reacting with a functional group (eg, a hydroxyl group, an amino group, a carboxyl group, etc.) in the uncrosslinked precursor polymer resin includes polyglycidyl according to the functional group. Examples include ethers, polyisocyanurates, polyamines, polyols, and polycarboxylic acids. The amount of the cross-linking agent used is preferably such that the ratio of the polymer resin to the cross-linking agent is in the range of 90:10 to 99.999: 0.001 by mass based on the total amount of the cross-linked precursor polymer resin, and 95: 5. ~ 99.995: The range of 0.005 is more preferable. When the mass ratio of the cross-linking agent is more than 10, the amount of resin necessary for developing appropriate viscosity, gelation, and solidification becomes extremely large, and the mass ratio of the cross-linking agent becomes 0.0
If it is less than 01, the gel strength tends to be low when it is used as a gelling and solidifying agent, which is not preferable.

The N-vinylacetamide resin used in the present invention can be produced by known aqueous solution polymerization, reverse layer suspension polymerization, emulsion polymerization, precipitation precipitation polymerization, and the like. A powder is obtained by spray drying or the like.

In the present invention, the water-soluble organic solvent is
-Use a vinylacetamide-based resin powder that does not dissolve or hardly swells. The term “hard to swell” means that when the resin is added to a solvent and / or a liquid surfactant and left for 24 hours, and then the resin is filtered off, the solvent absorbed in the resin and / or It refers to a state in which the liquid surfactant is 10 times or less the mass of the resin. The type of the water-soluble organic solvent to be used is not particularly limited as long as the N-vinylacetamide resin powder does not dissolve or hardly swell, but polyethylene glycol or polypropylene glycol, acetone, tetrahydrofuran, dioxane, acetonitrile, etc. Solvents are suitable. Among them, in terms of safety such as flammability, the solvent evaporates during the operation and the N-vinylacetamide resin powder does not precipitate on the surface of equipment or containers, and the liquid is viscous. For this reason, it takes time for the liquid adhering to the surface of the N-vinylacetamide resin powder to mix with water and / or alcohol when mixed with water and / or alcohol.
-Polyethylene glycol or polypropylene glycol is particularly preferred from the viewpoint that the dispersion of the vinylacetamide resin powder becomes better.

In the present invention, the liquid surfactant is N
-Use a vinylacetamide-based resin powder that does not dissolve or hardly swells. The type of the liquid surfactant used in the present invention is not particularly limited as long as it is a liquid at or around room temperature where the N-vinylacetamide-based resin powder does not dissolve or hardly swells.
Anionic surfactants represented by alkyl benzene sulfonate, alkane sulfonate, olefin sulfonate, monoalkyl sulfate, polyoxyethylene alkyl ether sulfate, and polyoxyethylene alkylphenyl ether sulfate; Examples of the cations include alkali metal ions such as sodium and potassium, and alkanolamines such as monoethanolamine, diethanolamine and triethanolamine. Nonionic surfactants such as nonylphenyl ethers and polyoxyethylene alkyl ethers represented by ethylene oxide adducts of higher alcohols, polyoxyethylene alkylphenyl ethers, polyoxyethylene polyoxypropylene block copolymers, etc .; alkyl betaines, alkyl amides Betaine-type, imidazoline-type amphoteric surfactants such as betaine, carbobetaine and hydroxysulfobetaine; or phosphate esters such as fatty acid alkanolamides represented by coconut oil fatty acid diethanolamide and the like, borate ester surfactants and the like. These may be used alone or in combination of two or more.

Of these, nonionic surfactants are preferably used in view of stability, low foaming property, etc., and among them, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether and the like are particularly preferable.
Polyoxyethylene alkyl phenyl ether is more preferably used. When the surfactant alone is mixed with the N-vinylacetamide resin powder, 10 to 2
It is necessary to use a surfactant having a liquid form at 0 ° C. When the surfactant is not liquid in the above temperature range, it is essential to use the surfactant in combination with a water-soluble organic solvent.

The amounts of the water-soluble organic solvent and the liquid surfactant used in the present invention are such that (A) the N-vinylacetamide resin powder and (B) the N-vinylacetamide resin powder do not dissolve or swell. 1: 9 by mass ratio of a water-soluble organic solvent and / or a liquid surfactant which is difficult to perform.
9-50: 50 is preferred, preferably 10: 90-40:
60. If the mixing ratio of the water-soluble organic solvent and / or the liquid surfactant is less than 50, the flow of the mixed composition of the N-vinylacetamide resin powder and the water-soluble organic solvent and / or the liquid surfactant is reduced. When added in water and / or alcohol, the initial dispersion becomes poor, and when the mixing ratio is more than 99, on the contrary, it is added to water and / or alcohol to obtain a desired thickening, gelling or solidifying state. A large amount of the composition is required to obtain.

The thickening, gelling or solidifying agent for water and / or alcohol according to the present invention comprises: (A) dissolving or swelling the (B) N-vinylacetamide resin powder; After dispersing in a difficult water-soluble organic solvent and / or a liquid surfactant, the mixture is dispersed in water and / or alcohol to increase the viscosity, gel or solidify before use. The amount of water and / or alcohol used may be appropriately adjusted and changed depending on the intended use, and is not particularly limited.

As the alcohol which can be thickened, gelled or solidified by using the thickening, gelling or solidifying agent of water and / or alcohol of the present invention, N-vinylacetamide resin powder dissolves and swells. There is no particular limitation so long as it is, for example, methanol, ethanol, propanol, isopropanol, ethylene glycol or propylene glycol, methyl cellosolve, cellosolve, butyl cellosolve, propyl cellosolve, diethylene glycol, methyl carbitol, carbitol, butyl carbitol, propyl carbitol , Propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol monopropyl ether, dipropylene glycol Le, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monobutyl ether, dipropylene glycol monopropyl ether, glycerin and its derivatives.

Furthermore, when the thickening, gelling or solidifying agent of the present invention is stored for a long period of time, especially when the particle size of the N-vinylacetamide resin powder is small, it sediments in the composition over time and becomes hard. It may become a hard cake and may not return to a uniform original composition even if it is stirred again during use.

In order to prevent this phenomenon, water is contained in an amount of 2 to 10% by mass, particularly preferably 2 to 5% by mass, based on the total amount of the thickening, gelling or solidifying agent of water and / or alcohol. It is valid. "Water" here means
(A) N-vinylacetamide resin powder; (B) water-soluble organic solvent and / or water contained in a liquid surfactant. If the water content is less than 2% by mass, the effect of addition is not sufficient.
-The vinylacetamide-based resin powder swells with time, and the fluidity of the entire composition is lowered, which is not preferable.

The thickening, gelling or solidifying agent of the present invention may contain additives such as chelating agents, fragrances, dyes, bactericides, stabilizers, corrosion inhibitors, accidental corrosion inhibitors, if necessary. Antifoaming agent, pH adjuster, enzyme, isopentane, normal pentane and other blowing agents, stannous chloride, stannous sulfate, hydrazine,
Reducing agents such as erythorbic acid and ascorbic acid, antibacterial agents such as resorcinol and phenoxyethanol, talc, diatomaceous earth, feldspar, quartz, calcium phosphate, aluminum oxide,
Abrasives such as zirconia, titanium oxide and zinc oxide or inorganic electrolytes, N to assist thickening, gelling or solidification
A thickener other than vinylacetamide-based resin powder, a water-absorbing agent (for example, gum arabic, juran gum, tragacanth gum, locust bean gum, guar gum, echo gum,
Karaya gum, xanthan gum, succinoglucan, agar, starch, carrageenan, alginic acid, alginate, propylene glycol alginate, dextran, dextrin, amylose, gelatin, collagen, pullulan, pectin, amylopectin, starch, chitin, albumin, casein, gluten, etc. Of natural polymers, sodium amylopectin semiglycolate, polyglutamic acid, polyaspartic acid, methylcellulose, ethylcellulose, propylcellulose, ethylmethylcellulose, hydroxyalkylcellulose, hydroxypropylmethylcellulose, hydroxypropylstarch, carboxymethylstarch, starch glycolate, Starch phosphate salt, alkali metal carboxymethyl Loin, alkali metal cellulose sulfate, cellulose graft polymer, cellulose acetate phthalate, starch - acrylic acid graft polymer, starch - acrylonitrile graft polymer,
Semi-synthetic polymers such as phthalic anhydride-modified gelatin and succinic acid-modified gelatin, polyvinyl alcohol (crosslinked product),
Polyethylene oxide (crosslinked product), polyvinylpyrrolidone (crosslinked product), polyvinyl methyl ether (crosslinked product), polymethylvinyl ester (crosslinked product), polyacrylate (crosslinked product), polyacrylic acid crosslinked product, carboxyvinyl polymer ( Crosslinked product), vinylpyrrolidone-ethyl acrylate copolymer (crosslinked product), vinylpyrrolidone
Styrene copolymer (crosslinked product), vinylpyrrolidone-vinyl acetate copolymer (crosslinked product), vinyl acetate- (meth) acrylic acid copolymer (crosslinked product), vinyl acetate-crotonic acid copolymer (crosslinked product) , N-vinylformamide (co) polymer (crosslinked product), vinyl acetate-crotonic acid copolymer (crosslinked product), vinyl acetate-maleic acid ester copolymer (crosslinked product), polyvinyl sulfonic acid (crosslinked product), Polyitaconic acid (crosslinked product), polyhydroxyethyl acrylate (crosslinked product), polyacrylamide (crosslinked product), acrylamide-acrylate copolymer (crosslinked product), styrene-maleic anhydride copolymer (crosslinked product), Synthetic polymers such as isobutylene-maleic anhydride copolymer (crosslinked product), acrylamide-acrylic acid copolymer (crosslinked product), silica, alumina, Zeolite, diatomaceous earth, activated clay, bentonite, talc, kaolin, magnesium oxide powder,
(Inorganic substances such as basic magnesium sulfate and zeolite) may be added.

[0032]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention.

All the N-vinylacetamide resin powders used below were dried at 105 ° C. for 4 hours before use to remove the moisture contained therein before use in order to confirm the influence of water. In normal use, when the amount of water in the N-vinylacetamide resin powder is clear, there is no problem if used without drying.

Examples 1 to 16 In accordance with the amounts (% by mass) shown in Table 1, the thickening, gelling or solidifying agents of the present invention were prepared. In Examples 1 to 10, N-vinylacetamide (co) polymer powder as N-vinylacetamide homopolymer crosslinked resin “Noniolex (registered trademark of Showa Denko KK) NA-010F (manufactured by Showa Denko KK, average particle diameter) In Examples 11 to 12, N-vinylacetamide (co) polymer powder was used as an N-vinylacetamide homopolymer crosslinked resin "Noniolex (registered trademark of Showa Denko KK) NA-010M (Showa Denko KK) In Example 13, N-vinylacetamide (co) polymer powder was used as the N-vinylacetamide homopolymer crosslinked resin "Noniolex (registered trademark of Showa Denko KK)". NA-150F
(Manufactured by Showa Denko KK, average particle size 15 μm), and Example 14 used N-vinylacetamide (co) polymer powder as an N-vinylacetamide homopolymer resin “BIAC (registered trademark of Showa Denko KK) GE” -191
(Manufactured by Showa Denko KK, particle size 0.05-0.18μ
m)), and Example 15 is an N-vinylacetamide (co) polymer powder N-vinylacetamide / sodium acrylate copolymer resin "BIAC (registered trademark of Showa Denko KK) GE-167 (Showa Denko KK) Made by company,
Particle size 0.05-0.18 μm) "
Represents N-vinylacetamide (co) polymer powder as N-
Vinylacetamide homopolymer highly crosslinked resin "Reogic GX-205 (manufactured by Nippon Pure Chemical Co., Ltd., average particle size 2 μm
m) "was used. In addition, polyethylene glycol, polypropylene glycol, acetone, and tetrahydrofuran used commercial products, and the surfactant used a commercial product of Kao Corporation.

As a preparation method, first, a water-soluble organic solvent or a liquid surfactant is put in a container, a calculated amount of water is added and mixed, and N-vinylacetamide (co) polymer powder is added thereto. Then, the N-vinylacetamide (co) polymer powder was uniformly dispersed by stirring.

The above-mentioned dispersion was used in a test for thickening, gelling or solidifying water and / or alcohol. In Examples 1 to 5 and 7 to 15, 90% by mass of water was used.
In Example 6, while stirring 90% by mass of ethanol in Example 6, 10% by mass of the dispersion in Examples 1 to 15 and 18% by mass in Example 16 were poured, and stirring was continued for 10 minutes, followed by stirring. The operation was stopped, and the appearance of the liquid was visually observed to make a judgment.

(Comparative Examples 1-2) According to the compounding amount (% by mass) shown in Table 1 below, N-vinylacetamide (co) polymer powder N-vinylacetamide homopolymer crosslinked resin "Noniolex (Showa Denko KK) Registered trademark) N
A-010F (Showa Denko KK, average particle size 15
μm) ”. A commercially available polyethylene glycol was used.

In Comparative Example 1, 3.3% by weight of N-vinylacetamide (co) polymer powder was directly dispersed in water without dispersing in a water-soluble organic solvent or a liquid surfactant.
After stirring for 10 minutes, stirring was stopped and the appearance of the liquid was observed to make a judgment.

In Comparative Example 2, the same operation as in Example was carried out to increase the viscosity of N-vinylacetamide (co) polymer powder,
A gelling or solidifying agent is prepared, wherein the water content in the composition is 1.5% by weight. In the test for thickening, gelling or solidifying water and / or alcohol, the above dispersion was used, and 90% by mass of water and / or alcohol was stirred and dispersed.
After stirring for 10 minutes, stirring was stopped, and the appearance of the liquid was observed to make a judgment.

[0040]

[Table 1]

With respect to the thickening, gelling or solidifying agent of water and / or alcohol obtained in the above example, the N-
The dispersibility of the vinylacetamide (co) polymer powder and the re-stirring property after storage (re-stirring and re-uniformity of the precipitated powder after standing for 3 days) were examined.

Evaluation of dispersibility Observed visually. The evaluation criteria are as follows. …: “Very well dispersed and good fluidity”…: “Goodly dispersed but slightly poor fluidity” △: “Somewhat uneven dispersion and poor fluidity” × ... "Dispersion is uneven, paste-like and poor in fluidity" Re-stirring visually observed. The evaluation criteria are as follows. …: “Good” △: “Slightly poor” ×: “Poor” Further, dispersion when water and / or alcohol was thickened, gelled or solidified in water and / or ethanol and stirred for a certain period of time Sex was examined. Evaluation of water and ethanol dispersibility Observed visually. The evaluation criteria are as follows. …: “Good dispersion” Δ: “Slight dispersion is uneven” X: “Dispersion is uneven” Table 2 summarizes the above test results.

[0043]

[Table 2]

As shown in Table 2, each of the thickening, gelling or solidifying compositions of Examples 1 to 16 showed excellent properties in all items. On the other hand, in Comparative Example 1, after about 10 minutes of stirring, the mamako state (the added powder is dispersed in a large lump, and the surface of the lump is wet with the liquid but the contents remain as the powder) is eliminated. However, only a non-uniform gelled composition was obtained. In Comparative Example 2, although there was no problem in thickening and gelling water using the obtained composition, the storage stability of the composition was lacking, resulting in poor re-stirring properties.

[0045]

The (A) N-vinylacetamide resin powder is first dispersed in (B) a water-soluble organic solvent and / or a liquid surfactant in which the N-vinylacetamide resin powder does not dissolve or hardly swell. This makes it possible to uniformly thicken, gel or solidify water and / or alcohol. For example, thickening of alcohol for disinfecting, thickening of detergent, thickening or gelling of liquid pesticides, cosmetics Thickening or gelling, electrolyte thickening or gelling,
Gelling of aromatic deodorant solution, gelling of insecticide solution, gelling of repellent solution, thickening or gelling of disinfectant solution, medical wastewater, chemical wastewater, industrial wastewater, garbage wastewater, brake wastewater It is useful in a wide range of fields such as solidification of waste liquids such as heavy metal-containing waste liquids and radioactive waste liquids.

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Claims (11)

[Claims] (1) A water-soluble organic solvent and / or a liquid surfactant in which (A) N-vinylacetamide resin powder and (B) N-vinylacetamide resin powder do not dissolve or hardly swell. A thickening, gelling or solidifying agent for water and / or alcohol characterized by comprising: 2. The thickening, gelling or solidifying agent for water and / or alcohol according to claim 1, wherein the N-vinylacetamide resin is a water-soluble N-vinylacetamide resin. 3. The method according to claim 1, wherein the N-vinylacetamide resin is N-vinylacetamide resin.
2. The thickening, gelling or solidifying agent for water and / or alcohol according to claim 1, which is a vinylacetamide-based crosslinked resin. 4. The thickening, gelling or solidifying agent for water and / or alcohol according to claim 1, wherein the water-soluble organic solvent is polyethylene glycol or polypropylene glycol. 5. The thickening, gelling or solidification of water and / or alcohol according to claim 1, wherein the liquid surfactant is a liquid surfactant at 10 to 20 ° C. Agent. 6. The liquid surfactant at least as
6. The method according to claim 1, wherein one kind of nonionic surfactant is used.
The thickening of water and / or alcohol according to any of
Gelling or solidifying agent. 7. A method according to claim 1, wherein (A) the N-vinylacetamide resin powder and (B) a water-soluble organic solvent and / or a liquid surfactant in which the N-vinylacetamide resin powder does not dissolve or hardly swell. The ratio is from 1:99 by mass ratio.
The thickening, gelling or solidifying agent for water and / or alcohol according to any one of claims 1 to 6, wherein the ratio is 50:50. 8. The water and / or water according to any one of claims 1 to 7, further comprising (C) water.
Or alcohol thickeners, gels or hardeners. 9. The method according to claim 1, wherein the content of water is 2% with respect to the total composition.
The thickening, gelling or solidifying agent for water and / or alcohol according to claim 8, wherein the amount is 10 to 10% by mass. 10. A method for thickening, gelling or solidifying water and / or alcohol according to any one of claims 1 to 7 to convert (A) N-vinylacetamide resin powder to (B) N- The vinylacetamide-based resin powder is dispersed in a water-soluble organic solvent and / or a liquid surfactant that does not dissolve or hardly swell, and then the mixture is added to water and / or alcohol. Thickening, gelling or solidifying methods. 11. Using the thickener, gelling or solidifying agent for water and / or alcohol according to claim 8 or 9,
(A) N-vinylacetamide resin powder is mixed with (B) N-
The vinylacetamide-based resin powder is dispersed in a water-soluble organic solvent and / or a liquid surfactant that does not dissolve or hardly swell, and (C) water, and then the mixture is added to water and / or alcohol. And / or a method for thickening, gelling or solidifying alcohol.