JPS61254678A - Aerosol type pressure-sensitive adhesive composition - Google Patents

Abstract

PURPOSE:To provide the titled aqueous dispersion-based composition of improved workability, stain resistance, etc., comprising water-soluble polymer, propellant, and water-dispersed hydrosol prepared by neutralizing the acid group in a specific acrylic copolymer followed by phase inversion. CONSTITUTION:The objective composition comprising a water-dispersed hydrosol with an average particle size 0.01-1.0mu prepared by adding alkali and water to (A) a copolymer with a weight-average molecular weight 10<4>-10<6> from (i) 1-20wt% of an unsaturated monomer having acid group and (ii) 99-80wt% of another unsaturated monomer consisting mainly of 2-15C (meth)acrylic alkyl ester copolymerizable with the component (i) to (partially) neutralize the acid group followed by phase inversion, (B) 0.01-20pts.wt. per 100pts.wt. of the component (A), of a water-soluble polymer and (C) a propellant.

Description

Detailed Description of the Invention [Field of Industrial Application] This invention improves workability, stain resistance, initial adhesion, and water resistance by making it possible to spray apply a specific hydrosol composition having pressure-sensitive adhesive properties. The present invention relates to a novel solvent-free, water-dispersed aerosol type pressure-sensitive adhesive composition that has significantly improved various properties such as:

[Conventional technology]

Traditionally, pressure-sensitive adhesives have been applied either directly to the adhesive surface or as pressure-sensitive adhesive tapes applied to one or both sides of a support such as paper or plastic film. There are problems in terms of area application and workability, and in the latter case, it is difficult to use especially on rough surfaces, and its usage is limited.

As a way to solve these problems, spray application of pressure-sensitive adhesives has the advantage of being easy to work with and can be applied uniformly to rough surfaces, so it can be used not only for industrial purposes but also for general household use. There are also many.

As an aerosol type pressure sensitive adhesive,
As seen in Japanese Patent No. 2460, a solvent type using an organic solvent as a medium is used. However, although these solvent-type aerosol pressure-sensitive adhesives are good in terms of sprayability and various adhesive properties, they are relatively low in concentration to prevent stringing during spraying, so they cannot be used in large quantities. Since it requires the use of organic solvents, it has flammability, inhalation toxicity to the human body, and other pollution-related problems, so it was necessary to pay close attention when using it.

Spray versions of emulsion-type pressure-sensitive adhesives have been developed to improve the above problems, but while they are non-polluting, they cannot be used as air sprays or airless sprays due to the stability of the emulsion particles. but,
From the viewpoint of portability, it could not be used as an aerosol play device, which is the simplest and most requested device.

In other words, when an emulsion-type pressure-sensitive adhesive is sealed in a pressure can with a propellant such as liquefied petroleum gas (LPG), chlorofluorocarbon gas, or ethers, the emulsion particles swell, coagulate, gel, and thicken due to the propellant during storage. It becomes unstable due to the following phenomena. Furthermore, when sprayed, the emulsion particles are destroyed by the large mechanical shearing force at the nozzle, resulting in clogging of the nozzle and resulting in poor spray performance. At present, solvent-free aerosol pressure-sensitive adhesives have not yet been put into practical use, as there are problems such as unavoidable foaming during spraying caused by the adhesive, and the inability to achieve uniform application.

[Problems to be solved by the invention] As described above, conventional aerosol-type pressure-sensitive adhesives have problems such as toxicity and pollution when using solvent-based adhesives, while emulsion-type adhesives do not have these problems. However, on the other hand, there was a problem that it was difficult to perform a stable aerosol spray due to destabilization of the emulsion particles and foaming during spraying.

Therefore, the present invention solves the above-mentioned conventional problems, enables a stable aerosol spray without a solvent, and also provides an industrially useful product that can form an adhesive coating film with good adhesive properties using this aerosol spray. The present invention aims to provide an aerosol type pressure sensitive adhesive composition.

[Means for Solving the Problems] As a result of intensive studies to achieve the above object, the inventors found that the particle diameter of the dispersed particles is smaller and the stability is lower than that of the conventional emulsion type adhesive. By using a high hydrosol type adhesive and using a water-soluble polymer substance as one of the components of this adhesive, which greatly contributes to the stability of the hydrosol, it is possible to produce a stable aerosol spray over a long period of time. In addition, this aerosol spray can provide a solvent-free, water-dispersed aerosol-type pressure-sensitive adhesive composition that forms an adhesive film with excellent adhesive properties such as initial adhesive strength and cohesive strength. This led to the completion of this invention.

That is, this invention provides an unsaturated monomer 1 having an acidic group.
~20% by weight, and 99% to 80% by weight of other unsaturated monomers whose main component is alkyl (meth)acrylic acid esters whose alkyl groups have 2 to 15 carbon atoms and can be copolymerized with this. An average particle diameter of 0.01 obtained by adding an alkali and water to a copolymer with an average molecular weight of 10 to 10 to neutralize some or all of the acidic groups in the copolymer, and inverting the phase.
~0.1μ water-dispersed hydrosol and 0°01~ for 100 parts by weight of the above copolymer contained in this hydrosol
The present invention provides an aerosol-type pressure-sensitive adhesive composition containing as essential components a water-soluble polymeric substance in a proportion of 20 parts by weight, and a propellant.

[Structure and operation of the invention]

The unsaturated monomer having an acidic group used to obtain the copolymer in this invention is an essential component for introducing a functional group, that is, an acidic group, into the copolymer necessary for hydrosolization. Unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, styrene sulfonic acid, allyl sulfonic acid, sulfopropyl acrylate, 2-acryloyloxynaphthalene-2-sulfonic acid, 2-methacryloyl Examples include saturated sulfonic acids such as oxynaphthalene-2-sulfonic acid, 2-acdylamido-2-methylpropanesulfonic acid, and 2-acryloyloxybenzenesulfonic acid, and these monomers may contain one or more types. Can be used.

The amount of the unsaturated monomer having an acidic group used is preferably 1 to 20% by weight, preferably 3 to 10% by weight in the monomer mixture for obtaining the copolymer. If the amount of this monomer used is less than 1% by weight, it will be difficult to form a hydrosol, and if it is used in excess of 20% by weight, there is a risk that adhesive properties such as tackiness and adhesion will be impaired. be.

On the other hand, other unsaturated monomers that can be copolymerized with the above monomers are important components for imparting pressure-sensitive adhesive properties, such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, acrylic acid The number of carbon atoms in the alkyl group is 2 or more, such as inoctyl, ethyl methacrylate, butyl methacrylate, etc.
No. 15 (meth)acrylic acid alkyl ester is used as the main component. This main monomer may be used alone or in combination of two or more types. Further, up to 40% by weight of this main monomer may be replaced with other modifying monomers.

Examples of single substances for modification include (meth)acrylic acid alkyl esters in which the number of carbon atoms in the alkyl group is outside the above range, such as methyl acrylate and methyl methacrylate, vinyl acetate, acrylonitrile, styrene, and 2-methoxyethyl acrylate. , vinyl ethers, glycidyl acrylate,
Examples include glycidyl methacrylate, 2-hydroxyethyl methacrylate, acrylamide, and N-methylolacrylamide.

The amount of the copolymerizable unsaturated monomer composed of the main monomer or the modifying monomer is 80 to 99% in the total mixture to obtain the copolymer. % by weight, preferably 90-97% by weight.

Mixtures of these monomers can be prepared using solution polymerization, emulsion polymerization,
Copolymerization can be carried out by conventionally known methods such as suspension polymerization and bulk polymerization, but particularly preferred are bulk polymerization and solution polymerization using a small amount of solvent. Among these polymerization methods, in the bulk polymerization method, the copolymer obtained by this polymerization method can be used as it is as a raw material for hydrosolization.

In the solution polymerization method, if the amount of solvent used is more than 20% by weight, part or all of the organic solvent is removed after polymerization by means such as distillation, but if it is in the 20-polymer form or less, it can be used as a raw material for hydrosolization. Can be used as The organic solvent in this case is preferably an alcoholic water-soluble solvent as described below. Of course, even if it is less than 20% by weight, part or all of it can be removed by the same means as described above.

Note that various general organic solvents can be used as the solvent used in the solution polymerization method, but if the solvent is to be subjected to hydrosolization with some or all remaining after polymerization, preferably methyl alcohol, ethyl alcohol, n- It is desirable to use alcohol-based hydrophilic solvents such as butyl alcohol, n-propyl alcohol, isopropyl alcohol, and 5ec-butyl alcohol, or oligomers or prepolymers having hydrophilic groups such as hydroxyl groups, carboxyl groups, and ami-7 groups.

On the other hand, in other polymerization methods, the medium used in each method is removed by appropriate means after synthesis to obtain a solid material substantially free of medium. That is, in the emulsion polymerization method, water is removed by coagulating and separating by salting out, and in the suspension polymerization method, water is removed by filtering the particulate copolymer. Note that some of the emulsifier or dispersant used during polymerization will adhere to the surface of the copolymer particles, but this will be removed during the above-mentioned medium removal operation, and if necessary, most of it will be washed several times. It can be removed completely.

In addition, emulsion polymerization produces highly three-dimensional copolymers,
A so-called gelled product may be formed, but such a copolymer may be an obstacle to hydrosolization.
It is desirable to prevent the formation of this copolymer as much as possible during emulsion polymerization.

However, even if a small amount of this type of copolymer is produced, it can be eliminated by masticating using a mixing roll, a Banbury mixer, etc., and applying a high shearing force.

The weight average molecular weight of the copolymer thus obtained is 1
If the molecular weight is less than 10, the cohesive force of the pressure-sensitive adhesive of the present invention will be poor, so even if it is sprayed onto the object and then adhered. Sufficient adhesive strength may not be obtained and there is a risk of the adhesive falling off, which is not preferable. Furthermore, if the molecular weight exceeds 10, it becomes difficult to form a hydrosol, which may lead to unfavorable results in terms of adhesive properties and the like.

In this invention, while stirring the copolymer thus obtained, alkali and water are added to neutralize some or all of the acidic groups in the copolymer, and O/
A water-dispersed hydrosol is prepared by phase inversion to W type. At this time, in order to facilitate hydrosolization, if necessary, the total amount of the organic solvent that may be contained in this copolymer is 20 parts by weight or less based on 100 parts by weight of the copolymer. After adding a proportion of an alcohol-based water-soluble solvent such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, or 5ec-butyl alcohol, an alkali and water may be added for phase inversion.

Examples of the alkali used here include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, amines such as ethylamine and propylamine, ammonia, and α-aminoethyl alcohol. Among these, those that can be easily scattered when sprayed, such as ammonia, are preferred, and can prevent deterioration of adhesive properties due to residual non-volatile alkali. The alkali may be added in an amount of 0.02 to 2 equivalents based on the acidic groups of the copolymer in order to neutralize some or all of the acidic groups in the copolymer.

The temperature during the neutralization treatment can be appropriately set depending on the type and properties of the copolymer, but is generally preferably in the range of 30 to 95°C. As an example of the method of neutralization treatment and hydrosolization, a predetermined amount of alkali or alkaline aqueous solution is added to the copolymer which has been previously polymerized and separated, and the mixture is thoroughly stirred and mixed.
Subsequently, by gradually adding water and inverting the phase, water becomes a continuous phase, resulting in 0/W in which copolymer particles are finely dispersed.
There is a way to generate a dispersion of types. Of course, the present invention is not limited to this at all, and an aqueous alkaline solution may be added instead of the water used during phase inversion to perform the neutralization treatment and hydrosolization at the same time.

The water-dispersed hydrosol obtained in this way is stably dispersed with an average particle size in the range of 0.01 to 0.1 p, and the solid content concentration for good sprayability is 5 to 45% by weight. be.

The water-soluble polymeric substance used in this invention imparts stability to the hydrosol during aerosolization, and is preferably a synthetic polymeric substance or a semi-synthetic polymeric substance. Of course, this hinders the use of natural polymeric substances such as starch.

isn't it.

Examples of the above synthetic polymer substances include polyvinyl alcohol, sodium polyacrylate, and polyvinylpyrrolidone, and in addition, nonionic water-soluble polymer substances having alkylene oxide groups such as ethylene oxide and propylene oxide, and water-soluble polyurethane resins. etc. are included.

The above-mentioned 7-ionic water-soluble polymer substance has the general formula R
-0+ Cm H2m O)n H or R-o-+C
Mono- or dialkyl ethers of polyalkylene glycol represented by mH2mO溌R, such as polyethylene glycol mono(or di)alkyl ethers,
Polypropylene glycol mono(or di)alkyl ethers, or R-Cα%C-! Mono- or di-alkyl esters represented by (2-D)H or R-COO+CmH2mOCR, such as polyethylene glycol mono(or di)laurate, polyethylene glycol mono(or di)stearate, polypropylene glycol mono(or di) Examples include laurate, polypropylene glycol mono(or di)stearate, and the like.

Further, as the above-mentioned water-soluble polyurethane resin, for example, the general formula -++-CmH2mOgCON H-RN H
Examples include cationic water-based urethane resins using the water-soluble polyol represented by No. Coo as a raw material and represented by the following general formula; various water-soluble polyurethane resins can be used depending on the raw material polyol.

Furthermore, examples of the semi-synthetic polymeric substances include cellulose-based substances such as carboxymethyl cellulose, hydroxyethyl cellulose, ethyl cellulose, and methyl cellulose, and starch-based substances such as soluble starch and carboxymethyl starch.

Among these water-soluble polymer substances, those that are unlikely to cause a decrease in tackiness and water resistance as pressure-sensitive adhesives and have relatively little thickening effect are preferred, and from this point of view, the nonionic water-soluble Polymeric substances or water-soluble polyurethane resins are particularly preferred. In addition, if the molecular weight is too low, it will significantly impede the water resistance of the resulting coating film, and if it is too high, the water solubility will decrease. A blade in the range is preferred.

The use of these water-soluble polymer substances is not limited to one type, and two or more types may be used in combination.

As for the method of adding it, either a method of adding it to the copolymer before hydrosolization or a method of adding and mixing it to the generated hydrosol is possible. Further, when adding, it is preferable to dissolve the above-mentioned polymeric substance in a small amount of water in advance and then add it.

The amount of the above-mentioned water-soluble polymer substance to be used varies depending on the composition of the copolymer constituting the hydrosol and the stability of the hydrosol particles, but in general, it is 0 to 100 parts by weight of the copolymer.
．． 0.01 to 20 parts by weight, particularly 0.05 to 15 parts by weight. If the above usage amount is less than 0.01 parts by weight, the stability of the hydrosol particles in the aerosol can will be poor, and if it is used in excess of 20 parts by weight, the system (
The viscosity (of the hydrosol) may become too high, which may conversely cause the particles to become unstable in the aerosol can or cause stringing, as well as reducing adhesive properties such as tack and adhesion, especially water resistance. This may lead to a decline in

If necessary, an external crosslinking agent may be added to the hydrosol composition thus obtained to improve adhesive properties. This crosslinking agent can be added at any stage before or after synthesis of the copolymer.

In addition, various additives such as ordinary tackifiers, softeners, plasticizers, fillers, film-forming aids, colorants, fragrances, fluorescent agents, anti-aging agents, rust preventives, antibacterial agents, alcohols, and cellosolves are added. A small amount of a hydrophilic solvent such as the following may be added at any manufacturing step, including the step of incorporating the propellant described below.

The aerosol-type pressure-sensitive adhesive composition of the present invention is filled into a sealed pressure-resistant container for aerosol, containing the hydrosol, the water-soluble polymer substance, and a propellant as essential components. As the propellant to be used, any propellant that is normally used as a propellant for aerosols, such as LPG, chlorofluorocarbon gas, and dimethyl ether, can be used. Freon gas and dimethyl ether are preferred from the viewpoint of sprayability.

This propellant and the hydrosol composition (solid content concentration 5 to 4)
5% by weight) and the blending ratio is usually 30 to 90% by weight/10
~70% by weight, and can be appropriately selected depending on the purpose of use and the type of monomer used. If the blending ratio of the propellant exceeds the above range, a large amount of spray will be required to obtain the desired adhesiveness. In addition, if the blending ratio is small, the viscosity of the system becomes high, which makes it impossible to spray uniformly and may prevent a uniform coating film from being obtained.

〔Effect of the invention〕

As described above, the aerosol-type pressure-sensitive adhesive composition of the present invention is a water-dispersed hydrosol obtained by adding an alkali and water to neutralize and phase invert a specific copolymer having an acidic group, and containing additives. Because it uses an extremely stable ultra-fine particulate hydrosol composition containing a water-soluble polymeric substance as an essential ingredient in combination with a propellant, it has excellent storage stability that could not be achieved with an emulsion type. It has sprayability and can solve various problems such as pollution, which are the drawbacks of solvent-type products.

That is, when the composition of the present invention is sprayed, it does not foam because it does not contain a surfactant, and the particle size is approximately 0.00 mm.
The particles are very fine, measuring 1 to 0.1, and are stabilized by water-soluble polymers, so they have excellent storage stability and can be sprayed easily, producing a uniform adhesive coating.
This coating exhibits excellent initial adhesive strength due to its early drying properties, which are proportional to the fine particles. In other words, according to this invention, although it is a solvent-free type,
It is possible to provide an aerosol-type pressure-sensitive adhesive composition that has sprayability comparable to solvent-type adhesives and excellent storage stability and adhesive properties.

[Examples] Examples of the present invention will be shown below and explained in more detail, but the present invention is not limited only to these examples, and various modifications may be made without departing from the technical idea of the present invention. can be applied. In addition, parts in the following examples and comparative examples mean parts by weight.

Example 1 10% by weight of a mixture consisting of 90 parts of n-butyl acrylate, 10 parts of ethyl acrylate, 9 parts of acrylic acid, 0.1 part of benzoyl peroxide, and 0.05 part of lauryl mercaptan was charged into four Lof flasks. , Nitrogen substitution was performed for about 40 minutes while stirring. Next, the polymerization reaction was started by raising the internal temperature, and the remaining mixture was added dropwise for 4 hours while controlling the reaction temperature to 83°C ± 5°C depending on the stirring speed, external temperature, and dropping rate of the remaining mixture. The reaction yielded a copolymer with a weight average molecular weight of 5×10 (according to GPC).

To 100 parts of this copolymer, 5 parts of a 25% by weight aqueous solution of a nonionic water-soluble polymer substance (product name: Unisafe U11300, manufactured by NOF Corporation) was added and mixed. .4 equivalents of ammonia water (
10% by weight) was added to perform a neutralization treatment, and water was further added for phase inversion to obtain a hydrosol in which the continuous phase was water. The obtained hydrosol had a solid content concentration of 30.2% by weight, a viscosity at 25° C. of 24 poise, and an average particle size (according to Nanosizer) of 0.05 μm.

A mixture of 100 parts of the hydrosol composition thus obtained, 1.5 parts of methylcellosolve and 0.5 parts of fragrance was mixed at a ratio of 60% by weight and 40% by weight of dimethyl ether, and the mixture was filled into an aerosol can. Thus, an aerosol type pressure-sensitive adhesive composition of the present invention was obtained.

Example 2 80 parts of 2-ethylhexyl acrylate, n-acrylic acid
10% by weight of a monomer mixture consisting of 15 parts of butyl, 5 parts of acrylonitrile and 8 parts of methacrylic acid;
Five parts of propyl alcohol were charged into four flasks, and the flask was purged with nitrogen for about 40 minutes while stirring. Next, 0.1 part of benzoyl tNll-oxide was added and completely dissolved, and then the temperature was raised to 80°C to start polymerization. The polymerization reaction was carried out by controlling the reaction temperature to 83°C ± 5°C by adjusting the stirring speed, external temperature, and dropping speed while dropping the residual monomer mixture.
The reaction was carried out for a period of time to obtain a copolymer having a weight average molecular weight of 4 x 105 (according to GPC).

Next, 0.8 to the carboxyl group of the above copolymer.
Equivalent amounts of ammonia aqueous solution (10% by weight) and water were added, and neutralization and phase inversion were performed at a temperature of 70°C to obtain a hydrosol whose continuous phase was water. The obtained hydrosol had a solid content concentration of 33% by weight, a viscosity at 25°C of 72 poise, and an average particle size (measured by Nanosizer) of 0.06/''.

To 100 parts of this hydrosol, 0.5 part of a 25% by weight aqueous solution of a water-soluble polyurethane resin (trade name: Corafral PU-85, manufactured by BASF) was added and mixed as a water-soluble polymer substance. Hydrosol composition 65 thus obtained
and 35 parts of dichlorodifluoromethane (Freon 12) were mixed therein and filled into an aerosol can to obtain an aerosol-type pressure-sensitive adhesive composition of the present invention.

Example 3 Four mixed solutions consisting of 90 parts of n-butyl acrylate, 10 parts of 2-methoxyethyl acrylate, 5 parts of acrylic acid, 0.15 parts of lauryl mercaptan, 3 parts of polyoxyethylene alkylphenol ether, and 160 parts of water were prepared. Pour into a flask, heat to 70°C with stirring, add 5 parts of potassium persulfate aqueous solution (2% by weight) to start polymerization, and continue emulsion polymerization for 3 hours while maintaining the reaction temperature at about 70°C. The weight average molecular weight was 510 (GPC
A copolymer emulsion was obtained.

Next, the obtained copolymer emulsion is salted out by a conventional method, the precipitated copolymer is filtered, washed with water, and dried, and 5 parts of isopropyl alcohol is added to 100 parts of this copolymer. After mixing, a hydrosol was obtained in the same manner as in Example 1. The obtained hydrosol has a solid content concentration of 32
The viscosity at 25° C. was 53 poise, and the average particle size (according to S/Sizer) was 0.08 μm.

To 100 parts of this hydrosol, 10 parts of a 4% by weight aqueous solution of polyvinyl alcohol (trade name Gohsenol GH-17, manufactured by Nippon Gosei Kagaku Co., Ltd.; degree of saponification 88%) was added and mixed.

Using the hydrosol composition thus obtained, the same operations as in Example 1 were carried out to obtain an aerosol type pressure-sensitive adhesive composition of the present invention.

Comparative Example The copolymer emulsion obtained in Example 3 was thickened by adding an aqueous ammonia solution (25% by weight) in an amount of 0.3 equivalents to the carboxyl group without being hydrosolized, resulting in an emulsion-type emulsion. A pressure adhesive was obtained. This emulsion has a solid content concentration of 39.2% by weight, a viscosity of 90 poise at 25°C, and an average particle size (Nanosizer) of 0.
．． It was 15m.

A mixture of 1.5 parts of methyl cellosolve and 0.5 parts of fragrance was added to 10 (l) of the obtained emulsion type pressure-sensitive adhesive in the same manner as in Example 1 at a ratio of 60% by weight and 40% by weight of dimethyl ether. The mixture was mixed and filled into an aerosol can to obtain an emulsion type aerosol type pressure sensitive adhesive composition.

Using the aerosol type pressure-sensitive adhesive composition obtained in each example, the coating amount was 509/r on each of the materials shown in Table 1.
It was sprayed uniformly with RF, and after 5 seconds it was bonded to the adherend, and after being pressed back and forth with an IKg roller once, it was left for a predetermined period of time. After standing, the material to be coated was peeled off in a direction of 180 degrees with respect to the surface to which it was applied, and the adhesive strength was measured. The measurement results are shown in Table 1.

Furthermore, when the emulsion-type aerosol-type pressure-sensitive adhesive composition obtained in the comparative example was sprayed, sagging and aggregates occurred at the spout, resulting in very poor sprayability and a uniform coating film could not be obtained. There wasn't.

Foaming was also observed on the coated surface. Furthermore, the contents agglomerated one week after storage, making spraying completely impossible.

In addition, each aerosol type pressure-sensitive adhesive composition was placed on a glass plate for 50? /lri and dried at 100''C for 5 minutes to form a coating film.This was immersed in ion-exchanged water at 40'C and changes in the coating film were monitored.The results are shown in Table 2. It was shown to.

Table 1 Table 2 Note 1) Uneven coating film due to poor sprayability As is clear from Tables 1 and 2, the aerosol-type pressure-sensitive adhesive composition of the present invention has an initial failure rate when sprayed. Adhesion developed very quickly, good adhesive strength was obtained, and water resistance was also excellent. Also, due to good sprayability, no foaming, no agglomerates, and no sag were observed at the spout.

Furthermore, the contents did not aggregate even after being stored at 40°C for 6 months, demonstrating excellent storage stability.

Claims (1)

[Claims] (1) 1 to 20% by weight of an unsaturated monomer having an acidic group;
The alkyl group copolymerizable with this has 2 to 15 carbon atoms (
Weight average molecular weight 1 consisting of 99 to 80% by weight of an unsaturated monomer mainly composed of meth)acrylic acid alkyl ester
An average particle diameter of 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 1.0 to 1.0 to 1.0 to 0.01 to 0.01 to 0.01 to 0.01 to 0.01 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to by 0.01 to 0.0 to 10.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 0.0 to 1.0 to 0.0 to 1.0 to 1.0 1.0% and 0.01 and 1.0 and 0.0 and 0.0 and 0.0 and 0.0 and 0.0 and and 0.1μm
An aerosol comprising as essential components a water-dispersed hydrosol, a water-soluble polymeric substance in a proportion of 0.01 to 20 parts by weight per 100 parts by weight of the above-mentioned copolymer contained in this hydrosol, and a propellant. Type pressure sensitive adhesive composition.