JPH0873833A - Tack agent composition - Google Patents

Abstract

PURPOSE: To obtain the subject composition excellent in rereleasability and repeated usability, thus useful for rereleasable memory paper etc., by incorporating a finely spherical tack agent or a tack agent containing such tack agent with a polyester and/or chlorlnated PP resin. CONSTITUTION: This composition is obtained by incorporating (A) pref. 100 pts.wt. of a finely spherical tack agent (pref. acrylic one) or a tack agent containing such tack agent with (B) pref. 5-50 (more pref. 15-30) pts.wt. of a polyester resin and/or chlorinated PP resin (pref. low-chlorinated one with the chlorine content of 20-40wt.% or so). The average particle diameter of the finely spherical tack agent in the component A is pref. 10-100 (more pref. 20-70)μm. Another version of this composition, obtained by incorporating the component B in the finely spherical tack agent dispersed in a dispersion medium for aerosols, is useful as a sprayable rereleasable tack agent excellent in aerosol sprayability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive composition suitable mainly for re-peelable memo papers, re-peelable memo films, and other re-peelable products requiring re-peelability and reusability.

[0002]

2. Description of the Related Art Releasable type memo paper, releasable type memo film, and other releasable products are manufactured by releasing paper on one side, the other side (non-releasing side) of a base material such as plastic film. An undercoat layer (anchor coat layer) is provided on the mold treatment surface),
It is carried out by a structure in which a removable pressure-sensitive adhesive layer is provided thereon. As such a releasable product, for example, a pressure-sensitive adhesive sheet obtained by forming a pressure-sensitive adhesive layer composed of pressure-sensitive adhesive microspheres on a surface base material, and further bonding release paper to the surface base material and the pressure-sensitive adhesive. A releasable pressure-sensitive adhesive sheet characterized in that an undercoating agent layer containing a pigment is provided between the layers (Japanese Patent Laid-Open No. 1-229089).

However, the step of preliminarily providing an undercoating agent layer on the non-releasing treated surface of the substrate is complicated, has good adhesiveness to the substrate and does not require an undercoating agent layer. The demand for things is growing. Examples of the removable pressure-sensitive adhesive composition that does not require such an undercoating agent layer include (meth) acrylate, a water-soluble monomer copolymerizable with the (meth) acrylate, and two or more polymerizations in the molecule. Of an average particle size of 10 to 100 μm obtained by aqueous suspension polymerization of a composition containing an oil-soluble polyfunctional monomer having a polyunsaturated group in the presence of an oil-soluble polymerization initiator and a surfactant. A sprayable pressure-sensitive adhesive composition has been proposed in which nitrocellulose is contained in a hydrophilic microsphere and dispersed in an aerosol dispersion medium (Japanese Patent Laid-Open No. 4-1174).
No. 78).

However, the sprayable pressure-sensitive adhesive composition according to the above proposal exhibits good adhesiveness when the substrate is paper without providing an undercoating agent layer, but when the substrate is a plastic film, the undercoating agent layer is provided. If it is not provided, good adhesiveness cannot be exhibited, and there is a problem in that there are restrictions in terms of use and workability.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides an undercoating agent layer without providing an undercoating agent layer.
An object of the present invention is to provide a removable pressure-sensitive adhesive composition that exhibits excellent adhesiveness to both plastic film substrates and paper substrates.

[0006]

A pressure-sensitive adhesive composition according to the invention of claim 1 (hereinafter referred to as "first invention") is a polyester containing a fine spherical pressure-sensitive adhesive or a pressure-sensitive adhesive containing a fine spherical pressure-sensitive adhesive. A resin and / or a chlorinated polypropylene resin are contained, whereby the above object is achieved.

The pressure-sensitive adhesive composition according to the invention of claim 2 (hereinafter referred to as "second invention") is a polyester resin and / or a polyester resin and / or a fine spherical pressure-sensitive adhesive dispersed in a dispersion medium for an aerosol. It is characterized by containing a chlorinated polypropylene resin, whereby the above object is achieved.

The pressure-sensitive adhesive composition according to the first invention and the second invention has a microspherical pressure-sensitive adhesive as a main component.

The type of the above-mentioned microspherical pressure-sensitive adhesive is not particularly limited, but an acrylic microspherical pressure-sensitive adhesive is preferably used.

The acrylic microspherical pressure-sensitive adhesives include methyl (meth) acrylate, ethyl (meth) acrylate,
Various alkyl (meth) s such as propyl (meth) acrylate, butyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate
An acrylate monomer as a main component, and these monomers and (meth) acrylic acid, maleic acid, 2-hydroxyethyl (meth) acrylate, N-methylol (meth) acrylamide, glycidyl (meth) acrylate, vinyl acetate, It can be obtained by copolymerizing with a monomer such as vinyl propionate, styrene and acrylonitrile.
The term "(meth) acrylate" used herein means "acrylate" or "methacrylate".

A specific method for producing the above-mentioned acrylic microspherical pressure-sensitive adhesive is, for example, after suspension polymerization or solution polymerization described in JP-A-50-2736, JP-A-63-260973 and the like. It is carried out by preparing an aqueous suspension of the microspherical pressure-sensitive adhesive by a method of suspending it in water, and then performing dehydration and solvent removal steps using, for example, a centrifuge.

The average particle size of the above-mentioned microspherical pressure-sensitive adhesive is not particularly limited, but is preferably 10 to 100 μm, more preferably 20 to 70 μm. If the average particle size of the microspherical pressure-sensitive adhesive is less than 10 μm, the characteristics as the microspherical pressure-sensitive adhesive are not exhibited, and the adhesive strength becomes too strong and the removability decreases. On the other hand, if the average particle diameter of the microspherical pressure-sensitive adhesive exceeds 100 μm, the adhesion area with the adherend decreases, so that it becomes difficult to obtain good adhesion.

In the pressure-sensitive adhesive composition according to the first aspect of the present invention, the pressure-sensitive adhesive containing a microspherical pressure-sensitive adhesive means a pressure-sensitive adhesive obtained by mixing the above-mentioned micro-spherical pressure-sensitive adhesive with a usual solvent type pressure-sensitive adhesive.

The types of the above-mentioned ordinary solvent-type pressure-sensitive adhesives include
Although not particularly limited, rubber-based, acrylic-based,
Solvent-based pressure-sensitive adhesives such as silicone-based adhesives are listed.
One kind or two or more kinds are preferably used, and among them, an acrylic solvent type pressure-sensitive adhesive is more preferably used.

The amount of the solvent-based adhesive mixed with the microspherical adhesive is not particularly limited, but it should be up to about 20 parts by weight of the solvent-based adhesive with respect to 100 parts by weight of the solid spherical adhesive. Is preferred. Microsphere adhesive 100 with solid content
If the mixing amount of the solvent-based adhesive with respect to parts by weight exceeds about 20 parts by weight, the removability of the obtained adhesive composition may be deteriorated.

The mixing method of the microsphere adhesive and the solvent-type adhesive does not require any special method. If necessary, an organic solvent may be added to the solvent-type adhesive and the microsphere-type adhesive may be added. It may be dispersed uniformly while stirring.

In the pressure-sensitive adhesive composition according to the first invention,
It is necessary that the polyester resin and / or the chlorinated polypropylene resin is contained in the microsphere adhesive or the adhesive containing the microsphere adhesive.

Further, in the pressure-sensitive adhesive composition according to the second invention, it is necessary that a polyester resin and / or a chlorinated polypropylene resin is contained in the fine spherical pressure-sensitive adhesive dispersed in the dispersion medium for aerosol. Is.

In the pressure-sensitive adhesive composition according to the first invention and the second invention, a pressure-sensitive adhesive composition obtained by incorporating a polyester resin and / or a chlorinated polypropylene resin into the microspherical pressure-sensitive adhesive which is the main component. Adhesive strength to plastic film and paper is remarkably improved, and for both plastic film base and paper base,
It exhibits excellent adhesiveness without providing an undercoat layer.

In the pressure-sensitive adhesive composition according to the second invention, the pressure-sensitive adhesive composition obtained by dispersing a fine spherical pressure-sensitive adhesive containing a polyester resin and / or a chlorinated polypropylene resin in a dispersion medium for aerosol is Exhibits excellent aerosol sprayability.

The type of the polyester resin used in the pressure-sensitive adhesive composition according to the first and second inventions is not particularly limited, but ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol. , Tripropylene glycol, 1,3-butylene glycol, 2,3
-Butylene glycol, bisphenol dioxyethyl ether, bisphenol dioxypropyl ether,
Neopentyl glycol, 1,4-butanediol,
One or more glycols such as 1,6-hexanediol and phthalic acid, phthalic anhydride, isophthalic acid, 3,6-endomethylenetetrahydrophthalic anhydride, tetrahydrophthalic acid, adipic acid, sebacic acid,
Thiodiglycolic acid, tetrachlor phthalic anhydride,
Various saturated polyester resins obtained by reacting with one or more types of saturated dibasic acids such as 3,6-endodichloromethylenetetrachlorophthalic acid are exemplified, and one or more types thereof are preferable. Used.

The chlorinated polypropylene resin used in the pressure-sensitive adhesive composition according to the first and second aspects of the invention is a white pellet resin obtained by chlorinating polypropylene resin and has a chlorine content of 20-40%. A low chlorinated polypropylene resin is preferably used.

The above polyester resin and chlorinated polypropylene resin may be contained alone in the microsphere adhesive or the adhesive containing the microsphere adhesive, respectively.
Although it may be contained in combination, it is more preferable that the polyester resin / chlorinated polypropylene resin is contained in combination in a weight ratio of about 1 to 5/9 to 5.

The content of the above-mentioned polyester resin and / or chlorinated polypropylene resin with respect to the microspherical pressure-sensitive adhesive or the pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive is not particularly limited, but the solid content of the microspherical pressure-sensitive adhesive or The polyester resin and / or chlorinated polypropylene resin is preferably about 5 to 50 parts by weight, and more preferably about 15 to 30 parts by weight, based on 100 parts by weight of the adhesive containing the spherical adhesive.

It is obtained when the content of the polyester resin and / or the chlorinated polypropylene resin is less than about 5 parts by weight based on the solid content of 100 parts by weight of the solid content of the fine spherical adhesive or the adhesive containing the fine spherical adhesive. If the effect of improving the adhesive strength of the pressure-sensitive adhesive composition is not obtained, and conversely the content of the polyester resin and / or chlorinated polypropylene resin exceeds about 50 parts by weight, the tackiness of the obtained pressure-sensitive adhesive composition is Get scarce.

The method of incorporating the polyester resin and / or the chlorinated polypropylene resin into the microspherical pressure-sensitive adhesive or the pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive is not particularly limited, and includes the microspherical pressure-sensitive adhesive or the microspherical pressure-sensitive adhesive. Polyester resin and / or chlorinated polypropylene resin may be directly added to an organic solvent dispersion liquid of an adhesive and dissolved by stirring, or a solution in which polyester resin and / or chlorinated polypropylene resin is previously dissolved in an organic solvent is prepared. Then, the solution may be mixed with a fine spherical adhesive or an organic solvent dispersion liquid of an adhesive containing a fine spherical adhesive in a predetermined mixing ratio, but it is easy to change the mixing ratio, and it is possible to shorten the time. The latter method is more preferable in consideration of the fact that a polyester resin and / or a chlorinated polypropylene resin can be mixed with the above.

By mixing an organic solvent dispersion of a polyester resin and / or a chlorinated polypropylene resin prepared in advance with an organic solvent dispersion liquid of a fine spherical adhesive or an adhesive containing a fine spherical adhesive, the solid content is Since the viscosity of the pressure-sensitive adhesive composition can be reduced without lowering it, the coatability is also improved.

In the adhesive composition according to the second invention,
It is necessary that the microspherical pressure-sensitive adhesive containing the polyester resin and / or the chlorinated polypropylene resin is dispersed in the dispersion medium for aerosol.

The dispersion medium for aerosol used in the pressure-sensitive adhesive composition according to the second aspect of the present invention is a first organic solvent for exhibiting sprayability and a first for controlling swelling degree and dispersibility of the fine spherical pressure-sensitive adhesive. No. 2 organic solvent and a propellant for spraying as an aerosol, and these solvents and propellants must be mutually soluble or have stable dispersibility under a jettable pressure. is there.

The first organic solvent for exerting the spraying property is not particularly limited, but includes toluene, n-hexane, 1,1,1-trichloroethane and the like, and one of them is used. Alternatively, two or more kinds are preferably used.

The second solvent for controlling the degree of swelling and dispersibility of the microspherical pressure-sensitive adhesive is not particularly limited, but alcohols such as methanol, ethanol and isopropanol, acetone and methyl ethyl ketone. , Ketones such as methyl isobutyl ketone, etc., and one kind or two or more kinds thereof are preferably used.

The mixing ratio of the first organic solvent and the second organic solvent is not particularly limited, but about 50 to 80% by weight of the first organic solvent and 50 to 2 of the second organic solvent.
It is preferably about 0% by weight.

When the mixing ratio of the first organic solvent is less than about 50% by weight, the sprayability of the obtained pressure-sensitive adhesive composition is deteriorated, and conversely, the mixing ratio of the second organic solvent is 20% by weight.
If the amount is less than the above range, the degree of swelling of the microspherical pressure-sensitive adhesive becomes too high, resulting in poor sprayability of the pressure-sensitive adhesive composition obtained.

The mixing ratio of the total amount of the first and second organic solvents and the fine spherical adhesive is not particularly limited, but the solid content of the fine spherical adhesive is 3 to 20% by weight. %
The mixing ratio is preferably such that the solid content is about 8 to 15% by weight.

If the solid content of the microspherical pressure-sensitive adhesive is less than about 3% by weight, the pressure-sensitive adhesive composition obtained will have poor tackiness or slow drying. On the contrary, the solid content is 20
If it exceeds about 5% by weight, the viscosity of the obtained pressure-sensitive adhesive composition becomes too high, resulting in poor sprayability.

Further, the propellant for spraying as an aerosol is not particularly limited, but includes dimethyl ether, a mixed system of propane and butane (liquefied natural gas), chlorofluorocarbon, and the like, and one of these is used. Or 2
More than one species are preferably used, and among them, dimethyl ether and liquefied natural gas that do not cause environmental problems are more preferably used.

For aerosol cans, generally 1.5 kg / c
An injection pressure of m ² or more is required, and the upper limit is the legal limit of the internal pressure of the aerosol (7 kg / cm ^{2 at} 45 ° C).
A preferable injection pressure is in the range of about 1.5 to 4 kg / cm ² , and it is preferable that the propellant is contained in an amount such that the injection pressure falls within the range shown on the left.

In addition to the above components, the pressure-sensitive adhesive composition according to the first invention and the second invention may contain elastomers such as cyclized rubber and nitrocellulose, if necessary, within a range that does not impair the object of the present invention. One or more of various additives such as various cellulose derivatives, tackifying resins, softening agents, plasticizers, fillers, stabilizers, and colorants may be contained.

The coating amount of the pressure-sensitive adhesive composition according to the first invention and the second invention on the substrate is not particularly limited and varies depending on the type of the substrate, but after drying it is 5 to 50 g /
It is preferably in the range of about m ² , and particularly 10 to
More preferably, it is in the range of about 40 g / m ² .

If the coating amount of the pressure-sensitive adhesive composition on the substrate is less than about 5 g / m ² after drying, the tackiness or adhesive strength will be weak, and conversely, if it exceeds about 50 g / m ² , the coating will be covered. The adhesive strength to the adherend becomes too strong, the removability decreases, and the cost increases due to excessive coating.

[0041]

The pressure-sensitive adhesive composition according to the first invention and the second invention is
Since the polyester resin and / or the chlorinated polypropylene resin is contained in the microspherical pressure-sensitive adhesive or the pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive, without providing an undercoat layer,
It exhibits excellent adhesiveness to both plastic film base materials and paper base materials, and also has good removability from adherends.

The pressure-sensitive adhesive composition according to the second invention comprises a first organic solvent for exhibiting sprayability and a second organic solvent and aerosol for controlling the swelling degree and dispersibility of the fine spherical pressure-sensitive adhesive. Since it is dispersed in an aerosol dispersion medium composed of a propellant for injecting as described above, a good aerosol spray property is exhibited.

[0043]

EXAMPLES In order to explain the present invention in more detail, examples will be given below. In the examples, "part" means "part by weight" and "%" means "% by weight". Also, the evaluation is 2
It was carried out under an atmosphere of 3 ° C-65% RH.

(Example 1)

( 1) Preparation of Microspherical Pressure-Sensitive Adhesive n-butyl acrylate, 2-ethylhexyl acrylate, styrene, vinyl acetate and vinyl propionate mixed monomers are solution copolymerized, and the resulting solution copolymer is dispersed in water. Then, an aqueous suspension of acrylic microsphere adhesive was prepared. Then, dehydration and solvent removal were performed with a centrifuge to obtain an acrylic microspherical adhesive having an average particle diameter of 35 μm.

( 2) Preparation of pressure-sensitive adhesive containing microspherical pressure-sensitive adhesive 80 parts of the obtained acrylic micro-spherical pressure-sensitive adhesive was mixed with toluene 4
After being dispersed in a mixed solvent of 53.5 parts and 453.5 parts of methyl isobutyl ketone, 3 parts of a toluene solution of zinc acetate (solid content: 5%) and an acrylic solvent-based pressure-sensitive adhesive (trade name "SK-Dyne 701"). , Solid content 40%, manufactured by Soken Kagaku Co., Ltd.) and mixed to obtain a solid content of 8.4% and a viscosity of 200.
A pressure-sensitive adhesive containing a fine spherical pressure-sensitive adhesive of 00 cps (23 ° C.) was prepared.

( 3) Preparation of Polyester Resin Solution 250 parts of saturated polyester resin, 440 parts of toluene,
200 parts isopropanol and 11 methyl ethyl ketone
It was dissolved in 0 part of the mixed solvent to prepare a polyester resin solution having a solid content of 25%.

( 4) Preparation of pressure-sensitive adhesive composition 90 parts of pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive obtained above (solids 7.6 parts) and 10 parts of polyester resin solution (solids 2.5 parts) Were mixed to prepare a pressure-sensitive adhesive composition having a solid content of 10.1%.

( 5) Evaluation The results of evaluating the coatability of the pressure-sensitive adhesive composition obtained above and the adhesiveness to a substrate by the following methods are shown in Table 1.

Coatability: A bar coater was used to coat the above adhesive composition on woodfree paper so that the coating amount after drying would be 18 g / m ^2, and was evenly coated on the surface of woodfree paper. Whether or not it was visually observed and judged as good or bad.

Adhesiveness to substrate : The above-mentioned pressure-sensitive adhesive composition was coated on a surface of a stretched polypropylene film having no undercoat layer by a bar coater so that the coating amount after drying was 18 g / m ^2. Then, after leaving at 23 ° C. for 15 minutes, the coated surfaces of the stretched polypropylene film are strongly pressure-bonded by hand, immediately peeled off, and the presence or absence of peeling of the pressure-sensitive adhesive layer from the stretched polypropylene film surface is visually observed. Adhesion to the substrate was evaluated according to the criteria. [Judgment Criteria] ∙ When the pressure-sensitive adhesive layer was not peeled from either side of the base material × ・ ・ ・ When the pressure-sensitive adhesive layer was peeled from one or both sides of the base material

The polyethylene terephthalate film, the polyethylene film, the polyvinyl chloride film, and the high-quality paper, all of which were not provided with the undercoating agent layer, were evaluated for adhesion to the substrate by the same method and judgment criteria as above.

(Example 2)

250 parts of a chlorinated polypropylene resin having a chlorine content of 25% was dissolved in a mixed solvent of 550 parts of toluene and 200 parts of isopropanol to prepare a chlorinated polypropylene resin solution having a solid content of 25%.

90 parts (solid content: 7.6 parts) of the pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive prepared in Example 1 was mixed with 10 parts of the above chlorinated polypropylene resin solution (solid content: 2.5 parts) to obtain a solid. A 10.1% adhesive composition was prepared.

(Example 3)

To 90 parts of the pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive prepared in Example 1 (solid content: 7.6 parts), 2 parts of polyester resin solution prepared in Example 1 (solid content: 0.5 parts) 8 parts (solid content: 2 parts) of the chlorinated polypropylene resin solution prepared in Example 2 was mixed to prepare an adhesive composition having a solid content of 10.1%.

(Example 4)

To 89 parts (solid content: 7.5 parts) of the pressure-sensitive adhesive containing the microspherical pressure-sensitive adhesive prepared in Example 1, 10 parts (solid content: 2.5 parts) of the polyester resin solution prepared in Example 1 were added. 1 part of a toluene solution of cyclized rubber (solid content 30%) was mixed to prepare an adhesive composition having a solid content of 10.3%.

Table 1 shows the results of evaluation of the coatability of the three types of pressure-sensitive adhesive compositions prepared in Examples 2 to 4 and the adhesion to the substrate in the same manner as in Example 1. .

(Comparative Example 1)

The coatability and the adhesiveness to the substrate were evaluated in the same manner as in Example 1 except that the pressure sensitive adhesive composition containing the fine spherical pressure sensitive adhesive prepared in Example 1 was used as the pressure sensitive adhesive composition. The results are shown in Table 1.

(Comparative Example 2)

The polyester resin solution prepared in Example 1 was used as an undercoat, and a base material precoated so that the coating amount after drying was 5 g / m ² was used. Table 1 shows the results of evaluation of the coatability and the adhesiveness to the substrate in the same manner as in Example 1 except that the pressure sensitive adhesive itself containing the prepared microspherical pressure sensitive adhesive was used.

[0065]

[Table 1]

(Example 5)

( 1) Preparation of fine spherical pressure sensitive adhesive dispersion 100 parts of the acrylic fine spherical pressure sensitive adhesive having an average particle diameter of 35 μm prepared in Example 1 was mixed with toluene (first organic solvent) 54
It was dispersed in a mixed solvent of 0 part and 360 parts of acetone (second organic solvent) to prepare a fine spherical pressure sensitive adhesive dispersion having a solid content of 10%.

( 2) Preparation of sprayable pressure-sensitive adhesive composition 80 parts of the microspherical pressure-sensitive adhesive dispersion obtained above (solid content 8
Part) and 20 parts of polyester resin solution prepared in Example 1 (solid content 5 parts) were mixed to prepare an adhesive composition having a solid content of 13%.

100 parts of the obtained pressure-sensitive adhesive composition (solid content 1
3 parts) was filled in an aerosol can, and 50 parts of dimethyl ether as a propellant was press-fitted to prepare a sprayable pressure-sensitive adhesive composition filled in the aerosol can.

( 3) Evaluation The spraying property of the sprayable pressure-sensitive adhesive composition filled in the aerosol can obtained above and the adhesiveness to the substrate were evaluated by the following methods. there were.

[0071] Spray properties: 20cm in fine paper which is arranged vertically apart, sprayed with the spray adhesive composition was visually observed uniformly whether it is coated on fine paper surface, determine the quality did. At this time, the internal pressure of the aerosol can was 2.5 kg / cm ² .

Adhesiveness to Substrate : The sprayable pressure-sensitive adhesive composition is applied to a surface of a stretched polypropylene film having no undercoat layer at a coating amount after drying of 10 g /
Adhesion to a substrate was evaluated in the same manner as in Example 1 except that spray coating was performed so as to have a m ² and drying was performed at 23 ° C. for 5 minutes. Further, the polyethylene terephthalate film, the polyethylene film, the polyvinyl chloride film, and the high-quality paper, all of which were not provided with the undercoating agent layer, were evaluated for adhesion to the substrate in the same manner as above.

(Example 6)

Microspherical PSA dispersion 8 prepared in Example 5
5 parts (solid content 8.5 parts) and 15 parts (solid content 3.75 parts) of the chlorinated polypropylene resin solution prepared in Example 2 were mixed to prepare an adhesive composition having a solid content of 12.25%. did. Then, using the obtained pressure-sensitive adhesive composition, a sprayable pressure-sensitive adhesive composition filled in an aerosol can was prepared in the same manner as in Example 5.

(Embodiment 7)

Microspherical pressure-sensitive adhesive dispersion liquid 8 prepared in Example 5
To 0 parts (solid content 8 parts), 4 parts of polyester resin solution prepared in Example 1 (solid content 1 part) and 16 parts of chlorinated polypropylene resin solution prepared in Example 2 (solid content 4 parts)
And were mixed to prepare an adhesive solution having a solid content of 13%. Then, using the obtained pressure-sensitive adhesive composition, a sprayable pressure-sensitive adhesive composition filled in an aerosol can was prepared in the same manner as in Example 5.

(Comparative Example 3)

A sprayable pressure-sensitive adhesive composition filled in an aerosol can was obtained in the same manner as in Example 5 except that the fine spherical pressure-sensitive adhesive dispersion liquid itself prepared in Example 5 was used as the pressure-sensitive adhesive composition. .

(Comparative Example 4)

200 parts of nitrocellulose for lacquer having a nitrification degree of 10% and a polymerization degree of 30 was dissolved in a mixed solvent of 300 parts of ethyl acetate, 300 parts of toluene and 200 parts of isopropanol to prepare a nitrocellulose solution having a solid content of 20%. .

Microspherical pressure-sensitive adhesive dispersion liquid 8 obtained in Example 5
0 part (solid content 8 parts) and 20 parts of the nitrocellulose solution obtained above (solid content 4 parts) were mixed to prepare an adhesive composition having a solid content of 12%. Then, using the obtained pressure-sensitive adhesive composition, a sprayable pressure-sensitive adhesive composition filled in an aerosol can was prepared in the same manner as in Example 5.

The sprayability and adhesiveness to the base material of the sprayable pressure-sensitive adhesive compositions filled in the four kinds of aerosol cans prepared in Examples 6 to 7 and Comparative Examples 3 to 4 were the same as in Example 5. The results of the evaluations are shown in Table 2.

[0083]

[Table 2]

[0084]

As described above, the pressure-sensitive adhesive composition according to the first aspect of the present invention exhibits excellent adhesiveness to both plastic film base materials and paper base materials, so the base material surface is preliminarily undercoated. Since it is not necessary to provide an agent layer and has good removability, it is preferably used as a re-peeling pressure-sensitive adhesive.

The pressure-sensitive adhesive composition according to the second aspect of the invention has the same characteristics as the pressure-sensitive adhesive composition according to the first aspect of the invention and has good aerosol sprayability, so that it is suitable as a sprayable removable pressure-sensitive adhesive. Used for.

Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C09J 7/02 JKF 123/28 JCM 133/06 JDD 167/00 JFS

Claims (2)

[Claims] 1. A pressure-sensitive adhesive composition comprising a microspherical pressure-sensitive adhesive or a pressure-sensitive adhesive containing a microspherical pressure-sensitive adhesive, which contains a polyester resin and / or a chlorinated polypropylene resin. 2. A pressure-sensitive adhesive composition, characterized in that a polyester resin and / or a chlorinated polypropylene resin is contained in a fine spherical pressure-sensitive adhesive dispersed in an aerosol dispersion medium.