JP2002121461A - Stock solution for forming polyurethane or aromatic polyamide and utilization of hydrotalcite compound particle for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain hydrotalcite compound particles having excellent affinity and dispersibility for an organic polar solvent and a stock solution for forming a polyurethane or an aromatic polyamide comprising the particles uniformly dispersed and compounded therein. SOLUTION: This dispersion comprises the hydrotalcite compound particles having (1) 0.1-3 μm average secondary particle diameter measured by the laser light diffraction scattering method, (2) 0.5-10 m2/g specific surface area measured by the BET method and (3) a crystal granular shape of a plate form and an organic polar solvent. The stock solution for forming the polyurethane or the aromatic polyamide comprises the hydrotalcite compound particles, the organic polar solvent and the polyurethane or aromatic polyamide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article made of polyurethane or aromatic polyamide having excellent chlorine resistance and heat deterioration resistance, and a molding solution for the molded article. More specifically, the present invention relates to a molded article formed from a polyurethane or an aromatic polyamide containing hydrotalcite compound particles of a specific shape, and a molding solution for the molded article. The present invention also relates to the hydrotalcite compound particles themselves mixed in the stock solution for molding.

[0002] Hydrotalcite compound particles can be used as polyurethane, polyvinyl chloride (P) as a fast halogen scavenger or an acid neutralizer due to its anion exchange ability.
Widely used for resin or rubber (elastomer) such as VC), polyolefin and polyamide. However, with the recent increase in social requirements, the resin has been required to have excellent stability against chlorine, heat, light, and the like. Therefore, it is necessary for the various compounding agents to be added to the resin to have excellent stability such as chlorine resistance, heat resistance, and light resistance. It has been found that there is.

For example, polyurethane elastic fibers have been widely used in functional clothing because of their high rubber elasticity, excellent recoverability, and excellent mechanical properties such as tensile stress. Further, it is also known that physical properties, discoloration and the like are caused by pool water subjected to chlorine bleaching and chlorine sterilization during washing. In order to prevent the deterioration due to chlorine, a method using zinc oxide as a chlorine-resistant agent (JP-A-57-2960)
No. 9 and Japanese Patent Application No. 56-93119) are mainly used, but they have a drawback that zinc oxide is easily eluted under acidic conditions in the dyeing step.

In order to reduce this drawback, a method using hydrotalcite compound particles has been proposed (JP-A-59-133248). However, although hydrotalcite compound particles have an effect as a chlorine-resistant agent, dimethylformamide (DMF) and dimethylacetamide (D) used for polyurethane polymerization and spinning are used.
MAC), etc., because of their poor affinity for organic polar solvents and poor dispersibility, many improvement proposals have been made.

For example, JP-A-3-292364 discloses hydrotalcite compound particles having an average particle diameter of 1 μm or less which have been surface-treated with a higher fatty acid and / or a silane coupling agent, and JP-A-5-78569 discloses carbon particles. It has been proposed to use hydrotalcite compound particles surface-treated with several tens to thirty fatty acids. JP-A-10-168657 and JP-A-10-168657
In Japanese Patent Application No. 0-168662, hydrotalcite compound particles and / or basic metal aluminum hydroxy compound particles that have been refined through a pulverization (or grinding) step using a bead mill are mixed with an anionic surfactant, a fatty acid, a silane, and a polyorganic compound. It has been proposed to use it with or without coating with a surface treatment agent such as siloxane, polyorganohydrogensiloxane.

[0006] Hydrotalcite compound particles surface-treated with higher fatty acids are used as a chlorine-resistant agent for polyurethane fibers. However, dimethylformamide, dimethylacetamide, dimethylsulfoxide and the like used for polyurethane polymerization and spinning are used. The organic polar solvent has poor compatibility with the hydrotalcite compound particles, and when used, wet grinding is performed in the organic solvent for a long time to obtain fine particles and disperse. Nevertheless, the problem of screen mesh penetration has not been completely solved, and is only used in some grades of polyurethane fibers as a chlorine degradant.

[0007] In addition, a part of the crystal surface of the hydrotalcite compound particles is destroyed by wet pulverization, resulting in a crystal defect, which becomes a new active site. The interaction with other organic additives such as an antioxidant causes color development. In some cases, the crystal defects may increase the solubility and increase the discoloration in the tannin solution treatment after dyeing. Furthermore, the aggregation of the hydrotalcite compound particles progresses in a form in which the crystal defects are complementary to each other, which causes a problem of poor screen mesh passage property, and the defects become adsorption sites of adhering water. It can cause problems. The aromatic polyamide film or fiber is
Due to its extremely excellent strength and rigidity, it is processed into industrial reinforcing materials, bulletproof vests and the like, but these are also required to have chlorine resistance and heat deterioration resistance, like polyurethane.

In order to solve these problems, studies have been conducted to find out that the shape, particle size and specific surface area of hydrotalcite compound particles mutually affect the dispersibility, heat deterioration, chlorine resistance and physical properties. It has been found that, by setting these to specific values, it can be a high dispersibility stabilizer having excellent heat deterioration resistance, chlorine deterioration resistance, workability, discoloration resistance, fading resistance, and reduction of environmental load. .

[0009]

SUMMARY OF THE INVENTION The main object of the present invention is to provide hydrotalcite compound particles which can be easily dispersed in an organic polar solvent without the need for wet pulverization, and are added as stabilizers to various polymers and the like. When doing
First, it is particularly suitable when a method of mixing after first dispersing in an organic polar solvent is adopted, and particularly when used as a chlorine deterioration preventing agent for polyurethane fibers, it is easy to prepare a dispersion in an organic polar solvent. Another object of the present invention is to provide hydrotalcite compound particles that do not cause problems such as coloring, discoloration, and clogging of a mesh in a manufacturing process.

A further object of the present invention is to provide a resin composition and a molded article thereof which, when incorporated into a resin, a dye or the like as a stabilizer, do not cause deterioration of the physical properties of the resin, thermal deterioration of molded articles and processed articles, chlorine deterioration, and the like. It is to provide processed products.

[0011]

Most of the problems that occur when hydrotalcite compound particles are used as a chlorine-resistant agent for polyurethane are as follows.
It originates in poor compatibility with organic polar solvents such as C and poor dispersibility, and the problem is further increased as a result of prolonged wet pulverization to compensate for this. Therefore, hydrotalcite compound particles which can be easily dispersed in an organic polar solvent only by ordinary stirring without performing wet grinding treatment, or hydrotalcite having a solid crystal structure in which the crystal surface does not change at all even if wet grinding is performed As a result of intensive studies on the talcite compound particles, the present invention has been achieved.

That is, the reason why the hydrotalcite compound particles are excellent in dispersibility and exert a remarkable effect on chlorine resistance deterioration is that the particle diameter, specific surface area and shape are affected, and therefore, the compound is not added to the resin. It has been found that hydrotalcite compound particles for obtaining a composition having high dispersibility and extremely low chlorine deterioration must have a shape satisfying specific conditions.

According to the present invention, (A) (1) the average secondary particle diameter measured by a laser beam diffraction scattering method is 0.60 to 3;
μm, (2) hydrotalcite compound particles having a specific surface area of 0.5 to 10 m ² / g measured by the BET method, and (3) plate-like crystal particles, and (B) an organic polar solvent. A dispersion comprising:

According to the present invention, (A) (1) the average secondary particle diameter measured by a laser beam diffraction scattering method is 0.60 to 3 μm, and (2) the specific surface area measured by a BET method is 0.5 to 10 m ² / g,
And (3) a hydrotalcite compound particle having a plate-like crystal particle shape, and a stock solution for dry or wet molding comprising (B) an organic polar solvent and (C) polyurethane or an aromatic polyamide.

According to the present invention, there is further provided a polyurethane fiber obtained by dry or wet molding the stock solution.
An aromatic polyamide fiber or an aromatic polyamide film is provided.

Hereinafter, the present invention will be described in more detail. The hydrotalcite compound particles used in the present invention have an average secondary particle diameter (MV value) of 0.60 to 3 μm, and preferably 0.8 to 2 μm, obtained by particle size distribution measurement by a laser light diffraction scattering method. And more preferably 1.0
１．５1.5 μm. The larger the average particle diameter is, the better the dispersibility in the organic polar solvent is, and the lower the viscosity is, the easier it is to use. However, for use in fiber or film applications, the average particle size is preferably at most 3 μm. If the lower limit of the range is less than 0.6 μm, aggregation tends to occur, the viscosity in an organic polar solvent increases, and the usability deteriorates. In addition, when wet pulverization is performed as necessary, the tendency of coloring is increased.

The specific surface area measured by the BET method is 0.5
10 to 10 m ² / g, preferably 1 to 7 m ² / g. It is considered that the smaller the specific surface area, the smaller the contact area with the solvent and the smaller the interaction between them, so that the dispersibility is also improved. When the specific surface area exceeds 10 m ² / g, aggregation tends to occur. On the other hand, when the specific surface area is less than 0.5 m ² / g, the chemical activity becomes too low and the chlorine resistance deteriorates. Further, from the viewpoint of preventing chlorine deterioration, the amount is preferably 1 to 7 m ² / g or more.

As the shape of the crystal particles, those having a low dispersion viscosity, good mesh permeability, and not easily broken during wet pulverization are desirable. Therefore, those having a plate shape are used, and the average aspect ratio (long diameter / thickness) is preferable. ) Is 1.
Hydrotalcite compound particles having 7 to 8, particularly preferably 2 to 6, plate-like crystal particle shapes are preferred.

The hydrotalcite compound particles of the present invention
Having the general chemical formula (I):_1-xAl_x(OH)_Two(CO_Three)_y(A^n-)_z・ MH_TwoO (I) In the formula, x is 0.1 <x <0.45, preferably 0.2 <x
<0.45, y and z are 0.9x ≦ (2y + nz) <
Satisfies 1.5x. m satisfies 0 ≦ m <1. A^n-
Is CO_Three ^2-Other than n-valent anions
As NO_Three ^-, Cl^-, OH^-, SO_Four ^2-, SO_Three ^2-,
S_TwoO_Three ^2-, HPO_Four ^2-, PO_Four ^3-, HPO_Three ^2-, PO_Three ^3-,
PO_Two ^-, H_TwoBO_Three ^-, SiO_Three ^2-, HSi_TwoO_Five ^-, Si_TwoO
_Five ^2-Or an organic acid ion is preferably mentioned.

In the present invention, the hydrotalcite compound particles satisfy the conditions (1) to (3) above.
The preparation method is not particularly limited. Examples of the preparation method include the following. JP-B-46-2280, JP-B-47-32198, JP-B-50-30039, JP-B-48-29777, and JP-B-51-29
No. 129, and hydrotalcite compound particles obtained by other methods can be obtained, for example, by heat treatment in an aqueous medium.

It is desirable that the hydrotalcite compound particles of the present invention be sufficiently washed with water after preparation. Content of soluble salts such as hydrochloride, bromate, nitrate, sulfate, carbonate, borate and bicarbonate of alkali metals and alkaline earth metals which may interact with organic polar solvents. Is desirably sufficiently low. Further, it is advantageous that each content of Pb, Hg, Cd or Sn, which is considered to have a large environmental load, is 1 ppm or less as a metal.

The hydrotalcite compound particles of the present invention have a low specific surface area and a large crystal particle, resulting in a low chemical activity and excellent acid resistance, a small adsorption capacity for dye molecules, and a wet pulverization treatment. Are stable crystal particles that can withstand the same and have extremely excellent dispersibility in organic polar solvents. Therefore, the hydrotalcite compound particles of the present invention can be advantageously used for dry or wet molding using an organic polar solvent such as polyurethane or aromatic polyamide. That is, the hydrotalcite compound particles of the present invention can be extremely well dispersed in a stock solution for molding in which a polyurethane or aromatic polyamide is dissolved in an organic polar solvent, and can maintain a stable dispersion state.

According to the present invention, it is possible to prepare an organic polar solvent dispersion in which hydrotalcite compound particles are well dispersed, and to prepare a molding solution in which a polyurethane or aromatic polyamide to which the dispersion is added is dissolved. Films and fibers can be obtained under stable conditions. Thus, a polyurethane fiber or an aromatic polyamide fiber or film in which hydrotalcite compound particles are uniformly dispersed in a polymer can be obtained.

In the present invention, as the organic polar solvent, those usually used for preparing a solution of polyurethane or aromatic polyamide are used. For example, dimethylformamide (DMF), dimethylacetamide (DMA)
C), dimethyl sulfoxide (DMSO) and N
-Methylpyrrolidone (NMP) is preferred.
The content of the hydrotalcite compound particles in the dispersion obtained by dispersing the hydrotalcite compound particles in an organic polar solvent is preferably 10 to 30% by weight, and more preferably 15 to 25% by weight.

The hydrotalcite compound particles of the present invention themselves have excellent affinity and dispersibility for organic polar solvents, but their effects are further enhanced by surface treatment with a surface treatment agent. In addition, the effect as a chlorine-resistant agent in a molded article of polyurethane or aromatic polyamide becomes excellent.

Examples of the surface treating agent for the hydrotalcite compound particles include higher fatty acids; mono- or diesters of orthophosphoric acid and stearyl alcohol, and their partial acid or phosphoric acid partial esters such as alkali metal salts; silane coupling Agent (general formula: Y—Si (OR) ₃ , Y
Represents an alkyl group, a vinyl group, an allyl group, an amino group, a methacryl group, a mercapto group, and OR represents an alkoxy group);
Titanate coupling agents such as isopropyl triisostearoyl titanate, isopropyl tris (dioctyl pyrophosphate) titanate, isopropyl tri (N-aminoethyl-aminoethyl) titanate, and isopropyl tridecylbenzenesulfonyl titanate; acetoalkoxy aluminum diisopropylate And other aluminum-based coupling agents.

Of these, at least one surface treatment agent selected from the group consisting of higher fatty acids, anionic surfactants, phosphate esters and coupling agents is preferred.

The surface coating treatment of the hydrotalcite compound particles using the above-mentioned surface treating agent can be carried out by a known wet or dry method.
For example, as a wet method, the surface treatment agent may be added in a liquid or emulsion state to a slurry of hydrotalcite compound particles and mechanically sufficiently mixed at a temperature up to about 100 ° C. In the dry method, the hydrotalcite compound particles may be added in a liquid, emulsion, or solid state with sufficient stirring by a mixer such as a Henschel mixer or the like, and sufficiently mixed with or without heating.

The surface-treated hydrotalcite compound particles may be washed with water, dehydrated, granulated, dried,
A means such as pulverization or classification can be appropriately selected and carried out to obtain a final product form. The amount of the surface treatment agent to be added is 10 parts by weight or less, preferably 0.1 to 5 parts by weight, per 100 parts by weight of the hydrotalcite compound particles. In the present invention, the surface of the hydrotalcite compound particles may be modified with at least one compound selected from the group consisting of silicon compounds, boron compounds, and aluminum compounds. By coating and modifying the surface, the basicity is reduced and the positive charge is reduced, so that coloring and discoloration of the resin can be suppressed.

Examples of the surface modifier include a silicon compound, a boron compound and an aluminum compound. Specifically, for example, sodium silicate, sodium silicate such as sodium orthosilicate, 1, 2, or 3 water glass, lithium silicate, potassium metasilicate,
Potassium orthosilicate, sodium tetraborate, sodium metaborate, sodium orthoaluminate, potassium orthoaluminate, sodium orthoaluminate, potassium metaaluminate, aluminum chloride, aluminum nitrate, aluminum sulfate, aluminum phosphate, etc. . These surface modifiers are based on 100 parts by weight of the hydrotalcite compound particles, Si, B or A.
It is used in a range of 2 parts by weight or less in terms of l. The hydrotalcite compound particles having been surface-modified in this manner can be further additionally treated with the above-mentioned surface treating agent and used.

For example, since the melting point of polyurethane fibers exceeds the decomposition temperature of urethane bonds and spinning by melt spinning is impossible, dry spinning is carried out by extruding a polyurethane solution into a heated gas stream after polymerization in a solvent and drying. And a production method such as wet spinning extruded into a coagulation bath. In the case of producing aromatic polyamide fibers (or films), a wet molding method is mainly used for the same reason. The hydrotalcite compound particles of the present invention have excellent affinity and dispersibility for organic polar solvents,
A molded product (fiber or film) in which the particles are homogeneously dispersed in polyurethane or aromatic polyamide is obtained. Thus, in the polyurethane or aromatic polyamide, the hydrotalcite compound particles exhibit an excellent effect as a chlorine-resistant agent.

Thus, according to the present invention, there is provided a stock solution (I) for dry or wet molding comprising (I) (A) hydrotalcite compound particles, (B) an organic polar solvent and (C) polyurethane, and (II) ) A stock solution for dry or wet molding comprising (A) hydrotalcite compound particles, (B) an organic polar solvent and (C) an aromatic polyamide (I)
I) is provided. In the stock solution for molding (I), the content of the hydrotalcite compound is suitably 0.05 to 5% by weight, preferably 0.1 to 3% by weight, and the polyurethane content is 10 to 45% by weight. Preferably 20 to
35% by weight is suitable.

On the other hand, in the stock solution for molding (II), the content of the hydrotalcite compound is suitably 0.05 to 5% by weight, preferably 0.1 to 3% by weight. Is 5 to 40% by weight, preferably 7 to
30% by weight is suitable. In polyurethane and aromatic polyamide, other additives usually added, for example,
Antioxidants, light stabilizers, ultraviolet absorbers, gas-resistant stabilizers,
Coloring agents, matting agents, fillers and the like can be added. These additives are added to a stock solution for molding.
The hydrotalcite compound particles of the present invention are finally added to the polyurethane or aromatic polyamide in the range of 0.1 to 10% by weight, preferably 0.5 to 5% by weight.

In the present invention, polyurethane is generally used for the production of elastic fibers, and includes, for example, a soft segment portion in which a diol is connected by a urethane bond and a hard segment portion which is, for example, a polyurea of an organic diisocyanate and a diamine. This is called a segmented polyurethane composed of For example, polyester diol, polyether diol, polycarbonate diol, polylactone diol, or a mixture thereof, or a copolymer thereof and an organic diisocyanate, and obtained by reacting with an organic diisocyanate at a molecular weight of 1,000 to 3,000 and at both ends. A prepolymer having an isocyanate group and a bifunctional active hydrogen compound as a chain extender, for example, diamines such as ethylenediamine, propylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine, heptamethylenediamine, and octamethylenediamine; Hydrazine derivatives such as dorado, bissemicarbazide, aminosemicarbazide, ethylene glycol, 1,3 propylene glycol, 1,4
-A polyurethane mainly composed of low molecular weight glycols such as butanediol, pentamethylene glycol and heptamethylene glycol.

The aromatic polyamide is an aromatic diamine such as metaphenylenediamine, paraphenylenediamine, 3,4'-diaminodiphenyl ether or 4,4'-diaminodiphenyl ether, and an aromatic diamine such as isophthalic dichloride or terephthalic dichloride. It is obtained by a reaction with an aromatic dicarboxylic acid chloride, and specific examples include polymetaphenylene isophthalamide or a copolymer thereof, and polyparaphenylene terephthalamide or a copolymer thereof.

[0036]

Next, the present invention will be described in detail with reference to examples.

The following physical properties and durability were measured by the following methods and means. (1) Average secondary particle size : The particle size distribution was measured by a laser diffraction scattering method, and the obtained MV value was defined as the average secondary particle size. (2) Aspect ratio (major axis / thickness) : Magnification is set to 50,000 times with a scanning electron microscope model JSM-6300, upright particles are searched for, and their thickness and diameter are measured. Here, the aspect ratio is a major axis / thickness. (3) BET specific surface area: The nitrogen adsorption amount at the temperature of liquid nitrogen was measured, and the specific surface area was determined by the BET method. (4) DMAC solution viscosity : After adding a hydrotalcite compound particle sample to a DMAC (dimethylacetamide) solvent, the mixture was stirred for 1 hour with a homomixer to obtain 13% by weight DMAC.
A suspension was prepared, and the viscosity was measured at 25 ° C. using a B-type viscometer. (5) Final sedimentation volume ratio : DMAC of each sample after viscosity measurement
The suspension was transferred to a measuring cylinder and allowed to stand for about one month, and the sedimentation volume was measured and expressed as a percentage of the original suspension volume. From the observation result by the phase contrast optical microscope, D
It has been confirmed that a MAC suspension having a small sedimentation volume has excellent dispersibility, while a suspension having a large sedimentation volume has poor dispersibility. Therefore, the degree of dispersibility is expressed in the sedimentation volume. The smaller the final sedimentation volume ratio, the better the dispersibility. (6) Measurement of acid reactivity by pH-STAT : 50 ml
Put 50 ml of pure water in a beaker, and place it in a thermostat.
7.5 ° C. After setting the pH meter electrode and the syringe for injecting 1N-HCl titrant into the beaker,
A 500 mg sample was charged under stirring, and the consumption of 1N HCl was recorded against time at a set pH of 2.0. 1N HCl amount corresponding to 25 mol% of the sample (4.25 ml)
The time T25 required to consume was measured. The smaller the T25 value, the higher the reactivity with the acid, and the larger the T25 value, the lower the reactivity. (7) SO ₄ content : colorimetric method (8) Cl content : absorptiometry (9) SiO ₂ content : gravimetric method Next, the present invention will be described in more detail by way of examples.

Examples 1 to 10 and Comparative Examples 1 to 3 Measurements of physical properties, chemical analysis and various tests were performed on various hydrotalcite compound particle samples having different average secondary particle diameters and BET specific surface areas, and the results are shown in Table 1. It was shown to.

[0039]

[Table 1]

Example 11 In a 300 ml beaker, 30.75 g of the hydrotalcite compound particles of Example 2 were weighed, and DMAC 236.5 was used.
g with a homomixer at 5,500-6,000r
The dispersion was performed at pm for 1 hour to prepare a hydrotalcite compound particle dispersion liquid [A]. 90 parts by weight of a DMAC solution containing 30 parts by weight of polyurethane and 10 parts by weight of a phenolic antioxidant were mixed in a homomixer at 5,500 to 6,000.
The mixture was mixed at 1 rpm for 1 hour to prepare a polyurethane [B]. This phenolic antioxidant is manufactured by Ciba-Geigy I.
RGANOX 1010 was used. Next, 60 parts by weight of the hydrotalcite compound particle dispersion [A] and 40 parts by weight of the polyurethane solution [B] were mixed with a homomixer for 5,50 parts.
The mixture was mixed at 0 to 6,000 rpm for 1 hour to prepare a polyurethane solution [C]. 10 parts by weight of the polyurethane solution [C] was added to 90 parts by weight of the DMAC solution and mixed with a homomixer at 5,500 to 6,000 rpm for 1 hour to obtain a stock solution for polyurethane molding having the following composition.

Composition of stock solution for polyurethane molding; hydrotalcite compound particles 0.78 parts by weight Phenolic antioxidant 0.4 parts by weight Polyurethane 28.08 parts by weight DMAC 70.74 parts by weight

Example 12 A stock solution for polyurethane molding was prepared in the same manner as in Example 11 except that the hydrotalcite compound particles of Example 7 were used.

Example 13 A polyurethane molding stock solution was prepared in the same manner as in Example 11 except that the hydrotalcite compound particles of Example 8 were used.

Example 14 An undiluted solution for polyurethane molding was prepared in the same manner as in Example 11 except that the hydrotalcite compound particles of Example 10 were used. The stock solutions for molding obtained in Examples 11 to 14 did not have any coloration or discoloration, had no problem in mesh / filtration properties, and did not show any change in sedimentation / separation of components even after standing for 5 hours. It showed a good stable state.

Example 15 108 g of m-phenylenediamine (MPD) and 203 g of isophthalic dichloride (IPC) were added to 360 g of DMA.
Low temperature solution polymerization was performed in the C solution. Subsequently, 296 g of a 25 wt% calcium hydroxide (Ca (OH) ₂ ) DMAC solution was added for neutralization, and then the DMAC dispersion 8 of the hydrotalcite compound particles (decrystallized water product) of Example 4 was added.
0 g was added and mixed to obtain a stock solution of polymetaphenylene isophthalamide for molding. The obtained stock solution for molding has the composition shown below.

22.7 parts by weight of polymer 1.1 parts by weight of hydrotalcite compound particles 62.1 parts by weight of DMAC The obtained stock solution for molding has no coloring or discoloration.
No change in sedimentation / separation of components was observed even after standing for a long time, indicating a good and stable state.

[0047]

According to the present invention, hydrotalcite compound particles which can be easily dispersed in an organic polar solvent can be provided. At the same time, when added as a stabilizer to various polymers, pigments, etc., it is particularly suitable when it is necessary to adopt a method of first suspending and mixing in an organic polar solvent, and particularly, it is easily used without a wet grinding treatment. It is possible to provide a chlorine-resistant agent for polyurethane or aromatic polyamide molded articles, which does not cause problems in appearance and process such as coloring, discoloration and clogging of meshes, etc.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09C 1/02 C09C 1/02 3/12 3/12 D01F 6/90 301 D01F 6/90 301 6/94 6/94 A F term (reference) 4F071 AA55 AB21 AE19 AE22 AF02 BA02 BC01 4J002 CK021 CL031 DE286 GK01 HA03 4J037 AA09 CA12 CA23 CA26 CB05 CB09 CB17 CB19 CB21 CB22 CB23 CC26 CC27 DD01 DD02 DD05 EE DD DD EE DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD DD FF25 4L035 AA04 BB02 BB03 BB11 BB14 JJ08 KK01 KK03 KK05 KK10 LC04

Claims (32)

[Claims] (A) (1) an average secondary particle diameter measured by a laser light diffraction scattering method is 0.60 to 3 μm;
(2) Specific surface area measured by BET method is 0.5 to 10
A dispersion liquid comprising m ² / g and (3) hydrotalcite compound particles having a plate-like crystal particle shape and (B) an organic polar solvent. 2. The dispersion according to claim 1, wherein the content of the hydrotalcite compound particles is 10 to 30% by weight. 3. The hydrotalcite compound particles,
The dispersion of claim 1 having an average aspect ratio (major axis / thickness) of 1.7 to 8. 4. The hydrotalcite compound particles,
2. The dispersion according to claim 1, wherein the surface is surface-treated with a surface treatment agent. 5. The hydrotalcite compound particles,
2. The dispersion according to claim 1, which is prepared in an organic polar solvent without wet grinding. 6. (A) (1) an average secondary particle diameter measured by a laser light diffraction scattering method is 0.60 to 3 μm;
(2) Specific surface area measured by BET method is 0.5 to 10
m is ² / g, and (3) the hydrotalcite compound particles (B) an organic polar solvent and (C) dry or wet molding stock comprising a polyurethane which is a crystalline particle shape plate. 7. The stock solution according to claim 6, wherein the content of the hydrotalcite compound particles is 0.05 to 5% by weight and the content of polyurethane is 10 to 45% by weight. 8. The hydrotalcite compound particles,
The stock solution for molding according to claim 6, which has an average aspect ratio (major axis / thickness) of 1.7 to 8. 9. The hydrotalcite compound particles,
7. The stock solution for molding according to claim 6, wherein the surface is surface-treated with a surface treatment agent. 10. The stock solution for molding according to claim 6, wherein the hydrotalcite compound particles are prepared in an organic polar solvent without performing wet grinding treatment. (A) (1) The average secondary particle diameter measured by a laser light diffraction scattering method is 0.60 to 3 μm,
(2) Specific surface area measured by BET method is 0.5 to 10
(3) Polyurethane fibers containing hydrotalcite compound particles having a plate-like crystal particle shape of m ² / g. 12. The polyurethane fiber according to claim 11, wherein the content of the hydrotalcite compound is 0.1 to 10% by weight. 13. The polyurethane fiber according to claim 11, wherein the hydrotalcite compound particles have an average aspect ratio (major axis / thickness) of 1.7 to 8. 14. The polyurethane fiber according to claim 11, wherein the surface of the hydrotalcite compound particles is subjected to a surface treatment with a surface treating agent. 15. The polyurethane fiber according to claim 11, obtained by dry or wet molding the stock solution for molding according to claim 6. 16. (A) (1) an average secondary particle diameter measured by a laser light diffraction / scattering method is 0.60 to 3 μm;
(2) Specific surface area measured by BET method is 0.5 to 10
m is ² / g, and (3) the hydrotalcite compound particles (B) an organic polar solvent and (C) dry or wet molding stock consisting aromatic polyamide is a crystalline particle shape plate. 17. The stock solution for molding according to claim 16, wherein the content of the hydrotalcite compound particles is 0.05 to 5% by weight and the content of the aromatic polyamide is 5 to 40% by weight. 18. The stock solution for molding according to claim 16, wherein the hydrotalcite compound particles have an average aspect ratio (major axis / thickness) of 1.7 to 8. 19. The stock solution for molding according to claim 16, wherein the surface of the hydrotalcite compound particles is subjected to a surface treatment with a surface treating agent. 20. (A) (1) The average secondary particle diameter measured by a laser light diffraction scattering method is 0.60 to 3 μm,
(2) Specific surface area measured by BET method is 0.5 to 10
An aromatic polyamide film or fiber containing hydrotalcite compound particles having a m ² / g and (3) a plate-like crystal particle shape. 21. The aromatic polyamide film or fiber according to claim 20, wherein the content of the hydrotalcite compound particles is 0.1 to 10% by weight. 22. The aromatic polyamide film or fiber according to claim 20, wherein the hydrotalcite compound particles have an average aspect ratio (major axis / thickness) of 1.7 to 8. 23. The aromatic polyamide film or fiber according to claim 20, wherein the surface of the hydrotalcite compound particles is surface-treated with a surface treatment agent. 24. The aromatic polyamide film or fiber according to claim 20, obtained by dry or wet molding the stock solution for molding according to claim 16. 25. (1) an average secondary particle diameter measured by a laser light diffraction scattering method is 0.60 to 3 μm;
(2) The specific surface area measured by the BET method is 0.5 to 1
(3) Hydrotalcite compound particles for dispersing an organic polar solvent, wherein the particle size is 0 m ² / g and (3) the crystal particles have a plate shape. 26. The hydrotalcite compound particles according to claim 25, which have a plate-like crystal particle shape having an average aspect ratio (major axis / thickness) of 1.7 to 8. 27. The hydrotalcite compound particles according to claim 25, which has been surface-treated with a surface treating agent. 28. The hydrotalcite compound particles according to claim 25, wherein the particles are surface-modified with at least one selected from the group consisting of a silicon compound, a boron compound and an aluminum compound. 29. The hydrotalcite according to claim 3, wherein the surface treatment agent is at least one selected from the group consisting of higher fatty acids, anionic surfactants, phosphate esters, and coupling agents. Compound particles. 30. The hydrotalcite compound particles according to claim 25, wherein the average secondary particle diameter measured by a laser light diffraction scattering method is 0.8 to 2 μm. 31. The hydrotalcite compound particles according to claim 25, wherein particles having a secondary particle diameter of 5 μm or more measured by a laser light diffraction scattering method are 1% or less. 32. An average aspect ratio (major axis / thickness) of 2
26. The hydrotalcite compound particles according to claim 25, having a plate-like crystal particle shape in the range of from 6 to 6.