JPH0559188A - Method for producing aqueous dispersion of chlorinated polyolefin resin - Google Patents

Abstract

PURPOSE:To obtain an aqueous dispersion of a chlorinated polyolefin resin having excellent storage stability for a long period of time, being extremely finely granulated, forming a coating film having excellent adhesivity to various substrates, hardness and chemical resistance because of possibility of solvent removal and complete aqueous property. CONSTITUTION:A premixed solution such as a premixed solution of a mixture of a chlorinated polyolefin resin and an acrylic resin having hydrophilic group and water or a preliminarily emulsified mixed solution of a terminal isocyanate group-containing urethane prepolymer having a hydrophilic group and water containing a neutralizing agent, having dissolved a chlorinated polyolefin resin is fed under pressure of 5-30kg/cm<2> to a suppressing part 1 in a chamber. A flow channel is divided into two, the mixed solution is introduced to a disc 3 and collided against plane parts 5 and 6 of a disc 4 under 100-10,000kg/cm<2> or the mixed solutions are mutually collided and emulsified.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing a new chlorinated polyolefin resin aqueous dispersion. More specifically, it relates to a method for producing an aqueous dispersion of a new chlorinated polyolefin resin having excellent stability, which is characterized by emulsifying and dispersing by passing through a novel emulsifying device.

[0002]

2. Description of the Related Art In recent years, water-based resins are characterized by low pollution and resource saving and are easy to handle and have little risk of fire.

Chlorinated polyolefin resin has excellent adhesion to various substrates and forms a hard and glossy film, which is difficult for water vapor and oxygen to pass through and is also attacked by various chemicals such as acid and alkali. It has a difficult property. For this reason, chlorinated polyolefins are widely used in printing inks, various primers, anticorrosion paints, chemical resistant paints, waterproofing agents, adhesives, etc., but generally in a state of being dissolved in a large amount of an aliphatic or aromatic solvent. Since it is used, there is a strong demand for an aqueous solution that is low in pollution, has no danger, and is excellent in environmental hygiene.

However, since conventional chlorinated polyolefin resins have a large specific gravity, when the resin is made into an aqueous dispersion, sedimentation of the resin easily occurs, and in order to suppress sedimentation, a large amount of emulsifier or protective colloid is required, There is a problem that the water resistance and adhesion of the coating film are significantly reduced.

For this reason, various methods have hitherto been studied for making the chlorinated polyolefin aqueous. The most common method is a method in which a chlorinated polyolefin dissolved in a solvent is mechanically dispersed in the presence of a general emulsifier or protective colloid. For example, it has already been disclosed that a resin solution in which a chlorinated polyolefin, a plasticizer and the like are dissolved is added to a solution of water and a surfactant and dispersed by a homomixer.

However, although the water-dispersed resin obtained by using this homomixer has a large particle size, there is no serious problem when it is used immediately after dispersion, but the storage stability is poor and the viscosity of the resulting aqueous dispersion is low. However, the removal of the contained organic solvent was difficult.

In place of this homomixer, various homogenizers, colloid mills, static mixers, etc. have been studied as means having a more mechanical dispersing force. However, among these, the static mixer has an effect of atomizing and dispersing in the case of liquid-liquid mixing which is relatively hydrophilic and has a high viscosity, but it is not so effective in dispersing hydrophobic polymers such as chlorinated polyolefin resin. No effect is observed.

A homogenizer consisting of a disk rotating at high speed and fine slits is also limited in rotation speed and slit spacing, and it is difficult to atomize it with sufficient stability. Among these, the Manton-Gorin colloid mill has the highest effect of atomization and dispersion, but this colloid mill has a structure in which a high-pressure predispersion liquid is passed between the slits pressed by the force of a strong spring. The pressure applied from the viewpoint of safety is limited, and since the amount of the premixed liquid to be injected is injected while pulsating, the slit spacing changes, and the particle size of the resulting dispersion liquid fluctuates. There is a big problem.

For this reason, it is necessary to repeatedly pass through the slits in applications where long-term stability is required, and it has been extremely difficult to actually manufacture the slits. Recently, a method of emulsifying a chlorinated polyolefin resin by using a water-based acrylic resin or urethane resin in combination without using a general emulsifier or protective colloid has been investigated. If you try to increase the content of chlorinated polyolefin as in the case of using a general emulsifier or protective colloid, the composition of a suitable water-based acrylic resin or urethane resin will be limited and it will be extremely difficult to atomize it. Tend to come.

[0010]

DISCLOSURE OF THE INVENTION The present invention is a method for producing an aqueous dispersion of a chlorinated polyolefin resin which is excellent in long-term storage stability, is extremely small and atomized, and is capable of desolvation and is substantially completely aqueous. The purpose is to provide.

[0011]

Means for Solving the Problems The present inventors have completed the present invention as a result of intensive research for solving the above problems.

That is, according to the present invention, the pre-emulsified mixed liquid is introduced into the channel in the chamber under pressure, and the mixed liquid is caused to collide with a predetermined flat portion in the channel under high pressure, or in the channel under high pressure. In the method for producing an aqueous dispersion of chlorinated polyolefin resin, the pre-emulsified mixed solution of water and chlorinated polyolefin resin is emulsified by an apparatus for emulsifying the mixed liquid by colliding with each other.

The aqueous dispersion obtained in the present invention is substantially completely aqueous, and by using an extremely small amount of a commonly used emulsifier or protective colloid, or by using an aqueous acrylic resin or an aqueous urethane resin having a wide composition range in combination. Also, a stable aqueous dispersion can be obtained without separation for a long period of time. Moreover, the coating film has extremely excellent adhesion and water resistance.

Next, the apparatus used in the present invention will be specifically described. The chamber of the device according to the invention comprises, in FIG. 1, restraining parts 1, 2 and disks 3, 4 which withstand ultra-high pressure. Each of the disks 3 and 4 is provided with two through holes and an extremely narrowed groove connecting the two holes. The groove preferably has a diameter of 50 to 1000 μm. The discs 3 and 4 are positioned inward so that the connecting grooves of the two discs are in contact with each other because the fluid passes from the disc 3 to the disc 4, and the discs are positioned at 90 degrees so that the grooves are cruciform. Are combined in.

The disk must be able to withstand fluid impingement under high pressure. For this reason, the material of the disk is an inorganic base material such as a sintered metal, a metal oxide, a boride, a carbide, a nitride, or another ceramic, or a mixture thereof, which can withstand ultrahigh pressure.

Next, the present invention will be specifically described with reference to the drawings. First, in FIG. 1, FIG. 2 and FIG. 3, the mixed liquid of pre-emulsified water and chlorinated polyolefin resin is mixed with 5 to 3 parts.
Under pressure of 0 Kg / cm ² , it is supplied to the restraining portion 1 in the chamber. The mixed liquid that has entered the restraining portion 1 is divided into two channels, is introduced into the disk 3, and collides with the flat surface portions 5 and 6 of the disk 4 as it is. The mixed liquid colliding with the flat surface is accelerated in the connecting groove 7 of the disk 3 on the side in contact with the disk 4 and flows toward the central portion, and the mixed liquid collides with each other at the central portion 8 of the disk 3. The resin particles are emulsified, dispersed, and crushed by the collision with the flat surface portion and the collision between the liquids, and become ultrafine particles. Next, the mixed liquid is formed into a disc 4 formed by 90-degree phase.
Flows outward from the central portion 8 through the connecting groove 9 and is taken out through two holes in the disk 4.

When the mixed liquid passes through the flow passage and the connecting groove divided into two in the chamber, the flow velocity increases and the pressure of the liquid increases. The pressure in this case is 100-10000 Kg / cm
^It is preferable to adjust to ² . If the pressure is less than 100 Kg / cm ^{2, the} dispersion force is weak and atomization becomes difficult. Further, when the pressure is increased above 10000 Kg / cm ^{2, the} atomization effect is not proportional even if the pressure is increased further, which is not only uneconomical but also the base material is abraded so that it can withstand long-term use. It is not preferable because it tends to disappear.

The apparatus of the present invention is not limited to the structure shown in FIGS. 1, 2 and 3, but the mixed solution can be made to collide with a predetermined flat portion in the channel of the chamber under high pressure, or high pressure. Basically, any structure may be used as long as it can cause the mixed liquids to collide with each other in the channel of the chamber below, but it is necessary to sufficiently emulsify, disperse, and crush the resin particles. Is preferably one having a structure in which the liquid or the mixed liquids can collide with the flat surface portion twice or more. For example, as shown in FIG. 4, the structure may be such that the flow paths are connected by the connecting groove on the surface where the disk 3a having one hole and the disk 4a having one hole are in contact with each other. As shown in FIG. 5, the structure may be such that, after colliding with the central portion of the connecting groove of the disk 3b, it can be taken out through the hole 10 of the disk 4b.

Examples of the new emulsifying apparatus used in the present invention include Microfluidizer manufactured by Microfluidic Co. of USA and Nanomizer manufactured by Cosmo Instrumentation Co. of Japan.

The chlorinated polyolefin resin used in the present invention includes ethylene, propylene, 1-butene, 3-
Α such as methyl-1-butene and 3-methyl-1-pentene
-Olefin homopolymers or copolymers, or α
-Copolymers of olefins and other monoweights, for example, chlorinated ethylene-vinyl acetate, ethylene-acrylic acid ester copolymers can be used together, but chlorinated polyethylene, chlorinated polypropylene, chlorinated Polypropylene-ethylene copolymer, chlorinated ethylene-vinyl acetate and the like are preferable. Alternatively, chlorinated rubber obtained by chlorinating raw rubber containing isoprene as a main component may be used. These chlorinated polyolefin resins may be used alone or in combination of two or more kinds. Commercially available products of chlorinated polyolefin resin are "Super Clon" (manufactured by Sanyo Kokusaku Pulp) and "Hard drain" (manufactured by Toyo Kasei Co., Ltd.).
Etc. As the chlorinated rubber, ADEKA chlorinated rubber [manufactured by Asahi Denka Kogyo Co., Ltd.] can be mentioned. Of these,
Those with a high degree of chlorination are provided as powder, so xylene,
It may be used by dissolving it in a known and commonly used aromatic solvent such as toluene.

In the present invention, the amount of the chlorinated polyolefin resin used in the chlorinated polyolefin resin aqueous dispersion is
It is 10 to 100% by weight, preferably 15 to 100% by weight. Use amount of chlorinated polyolefin resin is 10% by weight
If it is less than the above range, the adhesion to various raw materials, which is the gist of the present invention, deteriorates, which is not preferable.

Examples of general emulsifiers and protective colloids used in the present invention include the following. For example, sodium lauryl sulfate, sodium alkylbenzene sulfonate
Anionic emulsifiers such as da, sodium dioctyl sulphosuccinate, polyoxyethylene alkylphenyl ether sulfate; polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene- Nonionic emulsifiers such as polyoxypropylene block copolymers, water-soluble oligomers and emulsifiers having ethylenically unsaturated double bonds, so-called reactive emulsifiers, hydroxyethyl cellulose, carboxyethyl cellulose Such protective colloids can be used, and they can be appropriately selected and used.

The amounts of these general emulsifiers and protective colloids used are not particularly limited. Conventionally, it was general to use 5 to 10 parts with respect to 100 parts of solid content in the obtained chlorinated polyolefin resin aqueous dispersion, but in the present invention, 0.1 to 7 parts is a preferred amount to be used. Of these, 0.3 to 5 parts is particularly preferable. If the amount is less than 0.1 part, even if the emulsifying apparatus of the present invention is used, the once-atomized aqueous dispersion liquid tends to gradually re-aggregate during long-term storage, which is not preferable. On the other hand, if the amount is more than 7 parts, not only the emulsifying agent and protective colloid are further increased but the atomization effect cannot be remarkably obtained, but also the water resistance and adhesion of the coating film are deteriorated, which is not preferable.

As a method for dispersing a chlorinated polyolefin resin without using a general emulsifier or protective colloid, a water-based acrylic resin or urethane resin is used in combination, and the chlorinated polyolefin resin is dispersed by the dispersive power in water. The present invention can also be applied to a method.

For example, the following method can be mentioned as a method of using an acrylic resin together. A method of copolymerizing an acrylic monomer containing an α- or β-unsaturated carboxylic acid such as acrylic acid, methacrylic acid, crotonic acid or a salt thereof in a chlorinated polyolefin resin solution or a hydrophilic monomer such as the following. Examples thereof include a method of copolymerizing an acrylic monomer containing a monomer. For example, one end group of the polyoxyethylene moiety having an average molecular weight of 1500 to 15000 as a hydrophilic monomer is hydrogen or a carbon number of 1 to 20.
An acrylic acid (methacrylic acid) monomer having a side chain of the alkyl group can be used. The amount of the acid monomer or hydrophilic monomer used is 0.5 to 20% by weight based on the total amount of the chlorinated polyolefin resin and all the monomers.
When the amount of the acid monomer or hydrophilic monomer used is less than 0.5% by weight, the water dispersion effect of the resin solution obtained by using the emulsifying device of the present invention is not sufficient, so that a stable water dispersion liquid is obtained. Is difficult to obtain and is not preferable. If it exceeds 20% by weight, not only the water dispersion effect of the obtained resin solution is not increased so much and it is uneconomical, but also the water resistance of the obtained polymer is lowered, which is not preferable. A particularly preferable amount of the acid monomer or the hydrophilic monomer used is 1 to the total amount of the chlorinated polyolefin resin and all the monomers.
It is in the range of 15% by weight. Other polymerizable vinyl monomers copolymerizable with acid monomers or hydrophilic monomers include ethylenically unsaturated monomers. For example, methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, lauryl (meth) acrylate,
2-Hydroxyethyl (meth) acrylate, (meth)
Acrylic acid esters and methacrylic acid esters such as 2-hydroxypropyl acrylate, 2-hydroxy-3-chloropropyl (meth) acrylate, glycidyl ether (meth) acrylate, acrylamide, methacrylamide, N-methylacrylamide, Α- or β-unsaturated amides such as N-methyl acrylamide, unsaturated nitriles such as acrylonitrile and methacrylonitrile, vinyl chloride, vinylidene chloride, fluorine-containing monomers used for various water and oil repellents, etc. Vinyl halides, styrene derivatives such as styrene, α-methylstyrene and vinyltoluene, vinyl esters such as vinyl acetate and vinyl propionate, conjugated dienes such as α-olefin and butadiene, maleic anhydride, maleic acid Ester, itaconic acid aesthetic And ethylene, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, and the like, and one or more of them may be used.

The reaction of the acid monomer or hydrophilic monomer with another polymerizable vinyl monomer in the presence of the chlorinated polyolefin resin is carried out in an organic solvent, preferably a water-soluble organic solvent.

The organic solvent used is toluene,
Aromatic hydrocarbons such as xylene, aliphatic hydrocarbons such as hexane, peptane or octane, alicyclic hydrocarbons such as cyclohexane and cyclopentane, esters such as butyl acetate and ethyl acetate, isopropyl ether or butyl ether. Ethers such as, ketones such as methyl ethyl ketone, methyl isobutyl ketone,
n-butanol, 2-butanol, propylene glycol
, Isopropylene glycol, methanol, ethanol
Examples thereof include alcohols such as alcohol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and ethers such as diethylene glycol monoethyl ether. The amount of the above organic solvent is not particularly limited, but is usually 20 per 100 parts by weight of the total solid content.
Used in the range of up to 150 parts by weight. The alcohol solvent is preferably used within a range that does not impair the solubility of the chlorinated polyolefin resin.

In obtaining a vinyl copolymer resin solution of chlorinated polyolefin, benzoyl peroxide, lauroyl peroxide, di-tert-butyl peroxide, tert-butyl perbenzoate, tert-butyl peroctoate, acetyl peroxide, etc. are used. So-called radical initiators such as organic peroxides, nitriles such as 2,2'-azobisisobutyronitrile or 2,2'-azobispareronitrile can be used.

The method for preparing the above resin solution is not particularly limited, and for example, a radical initiator and a radical initiator can be added while stirring a water-soluble organic solvent solution containing a chlorinated polyolefin resin and an acid monomer or the above hydrophilic monomer. Other polymerizable vinyl monomers may be added dropwise, or a radical initiator and an acid monomer or hydrophilic monomer may be dissolved in the water-soluble organic solvent in which the chlorinated polyolefin resin is dissolved while heating and stirring. A vinyl monomer may be added dropwise, or a water-soluble organic solvent in which a chlorinated polyolefin resin is dissolved, a radical initiator, another polymerizable vinyl monomer and an acid monomer or a hydrophilic monomer may be added simultaneously in parallel. , A monomer to be copolymerized in a water-soluble organic solvent in which a chlorinated polyolefin resin is dissolved is polymerized with a radical initiator, and then an acid monomer or Aqueous monomer - may by way of further polymerizing added.

Dechlorination may occur in the polymerization step of the present invention. To suppress this side reaction, various epoxy resins, epoxides, basic lead salts, organic tin compounds, etc. are added as stabilizers. The amount of this stabilizer used is 1 to 5% by weight with respect to the chlorinated polyolefin resin usually used.

When an aqueous urethane resin is used as a method for dispersing the chlorinated polyolefin resin, it is carried out by the following method. As a normal water-based urethane resin manufacturing method,
A prepolymer having a carboxyl group that is relatively non-reactive with an isocyanate group and capable of forming a sufficient amount of a carboxyl group salt to form a stable aqueous dispersion is prepared. After the modified polyolefin resin is dissolved, an aqueous solution containing a neutralizing agent such as a tertiary amine is added to perform coarse emulsification, and then fine particle formation is performed through the emulsifying device of the present invention, and then chain extension may be performed. Then, the chlorinated polyolefin resin is dissolved in a prepolymer not containing a carboxyl group, and after adding an aqueous solution containing a small amount of an emulsifier to rough emulsification, fine particle formation is carried out through the emulsifying device of the present invention, and then chain extension is also performed. good. Thus, when it has the carboxyl group, a soap-free type polyurethane aqueous dispersion containing chlorinated polyolefin can be obtained by forming a salt, and when it does not contain the carboxyl group, a chlorinated polyolefin resin is prepared by using an emulsifier aqueous solution. It is possible to prepare a stable aqueous dispersion containing

The resulting vinyl copolymer resin solution is then roughly emulsified by adding water and then emulsified through the emulsifying device of the present invention. Further, when the vinyl copolymer has an acid group, if necessary, a part or all of the acid component is neutralized by dissolving it in water added at the time of rough emulsification with a volatile alkali such as ammonia, morpholine, etc. Emulsified through the device.

The aqueous dispersion of the chlorinated polyolefin resin obtained by the present invention can be directly kneaded with various coloring pigments, extender pigments, etc., and is excellent in dispersion stability and mechanical stability of the compounded liquid. It has the characteristic that the problem of bubble generation is extremely small.

The coating composition using the aqueous dispersion of the chlorinated polyolefin resin of the present invention can be applied by any method such as dipping method, brush coating, spray coating and roll coating. It can be applied to the surface of wood, paper, fibers, plastics, ceramics, inorganic cement substrates, iron, non-ferrous metals, etc. to impart excellent performance.

[0035]

EXAMPLES Next, examples will be given to specifically illustrate the present invention, but the present invention should not be limited to these examples. All parts and% in the examples are based on weight.

Example 1 A chlorinated polypropylene having a chlorine content of 26% and a molecular weight of about 60,000 was placed in a 21-four-neck flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and an inert gas inlet. 500 parts of a resin and 250 parts of toluene are added and dissolved by stirring at 80 ° C. for 2 hours. While cooling to 60 ° C. and stirring, an aqueous solution prepared by dissolving 2.5 parts of polyoxyethylene nonylphenol ether (40 moles of ethylene oxide added) in 500 parts of water at 60 ° C. was added dropwise over about 2 minutes. Then prepare a coarse emulsion. Then, the obtained coarse emulsion is used as a microfluidizer M-110Y.
(Manufactured by Microfluidic Co., Ltd.) and passed through the channel in the chamber at a pressure of 800 kg / cm ² , a milky white stable aqueous dispersion (referred to as resin 1) was obtained. The obtained aqueous dispersion was further desolvated at 60 ° C. under reduced pressure. Properties are non-volatile content 47.3%, pH
It had a viscosity of 5.6, a viscosity of 450 cps, a particle size of 0.7 microns, and no sedimentation was observed even after storage at room temperature for 3 months.

[Examples 2 to 3] [Comparative Examples 1 to 4] The amount of polyoxyethylene nonylphenol ether used, the type of emulsifier, and the pressure passing through the channel in the chamber in the case of a microfluidizer were changed. Except for the above, the same procedure as in Example 1 was carried out under the conditions shown in Tables 1 and 2 (Examples 2 and 3, Comparative Examples 1 to 4). The aqueous dispersions obtained in Examples 2 and 3 and Comparative Example 2 are referred to as Resin 2, Resin 3 and Resin 4, respectively.

The results are shown in Tables 1, 2 and 3.

[0039]

[Table 1]

[0040]

[Table 2]

[0041]

[Table 3] In addition, Manton-goulin colloid mill T in Tables 1 and 2
The YPE-15M was manufactured by Manton Gorin Co., the static mixer was manufactured by Noritake, and the TK-automixer was manufactured by Tokushu Kika.

Example 4 200 parts of a chlorinated polyethylene resin having a chlorine content of 26% and a molecular weight of about 80,000 and 100 parts of toluene were charged in the same apparatus as in Example 1 and heated to 105 ° C. with stirring. Warm. While maintaining the same temperature, it took 4 hours to prepare in advance a monomer mixture consisting of 240 parts of methyl methacrylate, 140 parts of lauryl methacrylate and 20 parts of methacrylic acid and 4 parts of tert-butyl peroxybenzoate as a polymerization initiator. After dropping in parallel, the acrylic resin was polymerized by further holding for 3 hours. After cooling to 60 ° C. and adding 23 parts of triethylamine, 1014 parts of water was added with stirring with a homomixer for coarse emulsification. Then, the obtained crude emulsion was introduced into Microfluidizer M-110Y (manufactured by Microfluidic Co., Ltd.) and passed under a pressure of 3500 kg / cm ² to obtain a milky white stable aqueous dispersion. The properties of the obtained aqueous dispersion are as follows: non-volatile content: 35.8%, pH: 8.5, viscosity: 940 cp
s, the particle size was 0.5 micron, and no sedimentation was observed even after storage at room temperature for 5 months.

EXAMPLE 5 138.6 parts of polytetramethylene ether glycol having a molecular weight of 1000, 567.6 parts of polytetramethylene ether glycol having a molecular weight of 2000 and 43 parts of dimethylolpropionic acid were placed in the same apparatus as in Example 1. 2.8 parts, 2 parts of isophorone diisocyanate
A prepolymer having a nonvolatile content of 60.7% and an NCO content of 2.37% was obtained from 33.4 parts and 655.5 parts of methyl ethyl ketone. While maintaining the obtained prepolymer at 60 ° C., a chlorine content of 35% was previously added to 163.8 parts of toluene.
%, Chlorinated polypropylene resin with a molecular weight of about 100,000 2
A solution in which 45.8 parts is dissolved is added to make a uniform solution. In a separate container, 33.1 parts of triethylamine and 37.8 parts of piperazine anhydride were dissolved in 1048 parts of water, and the homogeneous solution of the prepolymer and chlorinated polypropylene was stirred for about 5 minutes with a homomixer. Added. A white dispersion was obtained, which had a particle size of about 2.5 microns and was found to separate into two layers after 1 day. Then, the obtained white dispersion liquid was stirred again with a homomixer, and was then passed twice using a Microfluidizer M-110Y (manufactured by Microfluidic Co., Ltd.) under a pressure of 3500 kg / cm ² to give a bluish milky white A stable aqueous dispersion of was obtained. The properties of the obtained aqueous dispersion are such that the nonvolatile content is 41.1%,
The pH was 8.9, the viscosity was 1090 cps, the particle size was 0.5 micron, and no sedimentation was observed even after storage at room temperature for 5 months.

[Application] The resin dispersions obtained in Examples 1 to 3 and Comparative Example were tested for their effect as a primer for coating polypropylene molded articles. It was applied to a polypropylene plate used for a bumper for automobiles degreased with trichloroethylene, dried, and then spray coated with a two-component urethane paint to measure coating film characteristics. The results are shown in Table 4.

[0045]

[Table 4]

[0046]

The aqueous dispersion of chlorinated polyolefin resin obtained by the production method of the present invention is extremely stable,
By removing the solvent, it can be used as a complete aqueous dispersion containing substantially no organic solvent. Similar to the solvent type, it has excellent adhesion to various substrates and forms a hard and glossy film, which is difficult for water vapor and oxygen to pass through and is not easily attacked by various chemicals such as acids and alkalis. Retains the nature.

Therefore, the aqueous dispersion of the chlorinated polyolefin resin can be widely used for printing inks, various primers, anticorrosion paints, chemical resistant paints, waterproofing agents, adhesives, etc. as well as the solvent type.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a chamber of the apparatus.

FIG. 2 is a cross-sectional view of a chamber of this device.

FIG. 3 is an assembled perspective view of a disk of a chamber of the device.

FIG. 4 is an assembled perspective view of the disk of the chamber of the present apparatus.

FIG. 5 is an assembled perspective view of the disk of the chamber of the apparatus.

[Explanation of symbols]

 1, 2 Suppression part 3, 3a, 3b, 4, 4a, 4b Disk 5, 6 Flat surface of disk 7 Disk connecting groove 8 Central part of disk connecting groove 9 Disk connecting groove 10 Disk hole

Claims (5)

[Claims] 1. A pre-emulsified liquid mixture is introduced into a channel in a chamber under pressure, and the liquid mixture is caused to collide with a flat surface portion in the channel under high pressure, or the liquid mixture in the channel under high pressure. A method for producing an aqueous dispersion of a chlorinated polyolefin resin, which comprises emulsifying a pre-emulsified mixed liquid of water and a chlorinated polyolefin resin with an apparatus for emulsifying by colliding with each other. 2. The pressure at the time of collision is 100 to 10,000 kg /
The method for producing an aqueous dispersion of a chlorinated polyolefin resin according to claim 1, wherein the method is cm ² . 3. A pre-emulsified liquid mixture of water and a mixture of a chlorinated polyolefin resin and an acrylic resin having a hydrophilic group is used as a pre-emulsified liquid mixture of water and a chlorinated polyolefin resin. Item 3. A method for producing an aqueous dispersion of a chlorinated polyolefin resin according to Item 1 or 2. 4. A pre-emulsion of a hydrophilic group-containing isocyanate group-terminated urethane prepolymer in which a chlorinated polyolefin resin is dissolved and water containing a neutralizing agent, as a pre-emulsified liquid mixture of water and a chlorinated polyolefin resin. The method for producing an aqueous chlorinated polyolefin resin dispersion according to claim 1 or 2, wherein a mixed solution is used. 5. A pre-emulsified liquid mixture of an isocyanate group-terminated urethane prepolymer containing no hydrophilic group, in which a chlorinated polyolefin resin is dissolved, as a pre-emulsified liquid mixture of water and a chlorinated polyolefin resin. The method for producing an aqueous chlorinated polyolefin resin dispersion according to claim 1 or 2, which is used.