JPH06172718A - Novel pressure-sensitive adhesive material - Google Patents

Abstract

PURPOSE:To improve pliability, adhesion to soft PVC, and storage stability by forming a pressure-sensitive adhesive layer on a substrate obtained by curing a specific composition. CONSTITUTION:100 pts.wt. poly(alkylene oxide) (A) containing an Si-bonded hydroxyl or hydrolyzable group and at least one, per molecule, organosilicon group crosslinkable through a siloxane bond and having a mol.wt. of 500-50,000 is mixed with 10-500 pts.wt. liquid organic rubber polymer containing at least one, per molecule, functional group capable of forming a hydrogen bond with the polymer (A) and having a mol.wt. of 500-50,000 and 0.1-10 pts.wt. curing catalyst to obtain a curable composition. This composition is applied on a release film and dried at ordinary temp. to 150 deg.C for 0.5-30min to obtain a substrate in tape or sheet form. A pressure-sensitive adhesive layer having a thickness of 5mum to 1mm is formed on the substrate.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention has a pressure-sensitive adhesive layer laminated on a flexible substrate obtained by curing a specific composition and has a high adhesive strength and storage stability. The present invention relates to an excellent tape-shaped or sheet-shaped pressure-sensitive adhesive material.

[0002]

2. Description of the Related Art There have heretofore been known several methods for obtaining a tape-shaped or sheet-shaped pressure-sensitive adhesive having a relatively high adhesive force. For example, a method of increasing the thickness of the pressure-sensitive adhesive layer is known, but the thickness of the adhesive layer has a limit, and thus the adhesive force also has a limit.

Further, when a thick foam is used as the base material, the adhesiveness of the pressure-sensitive adhesive becomes relatively good, but in the case of the most common urethane foam or polyethylene foam, a relatively high peel adhesion and shearing force are used. There is a problem in that it is not easy to combine the adhesive force with the adhesive strength, and satisfactory properties are not obtained.

In order to solve such a problem, a pressure-sensitive adhesive containing a specific type of bubbles in a specific ratio (Japanese Patent Laid-Open No. 58-125776) has been obtained. However, this pressure-sensitive adhesive has a pressure-sensitive adhesive property by being foamed with a composition that has a pressure-sensitive adhesive property when polymerized and then placed on a substrate and polymerized on site before the bubbles disappear. It has the drawback that it has to be in a state that is quite special both in terms of form and manufacturing.

It should be noted that, instead of the bubbles, pressure sensitive adhesive tape containing glass microbubbles which employs ultraviolet polymerization (Japanese Patent Application Laid-Open No. Sho 5 (1999) -58200).
No. 3-141346 and JP-A-62-34976) are also implemented, but when a sufficient amount of black pigment is added, ultraviolet rays are blocked and polymerization is hindered. There was a drawback that it was difficult to obtain.

[0006] Further, a pressure-sensitive adhesive layer is laminated on a substrate obtained by curing a curable composition mainly composed of a rubber-based organic polymer and a curing catalyst which are liquid at room temperature, in a tape or sheet form. The pressure-sensitive adhesive of JP-A-3-122175 is known, but when the pressure-sensitive adhesive is stored for a long period of time or at a high temperature, the uncured material of the rubber-based organic polymer of the base material is pressure-sensitive. There is a drawback in that the adhesive strength is gradually reduced after shifting to the adhesive layer, that is, the storage stability is insufficient. In particular, the decrease in high-temperature adhesive strength with respect to soft PVC, which is used as an adherend in many applications including automobile applications, is remarkable.

[0007]

The present invention provides a tape-like or sheet-like pressure-sensitive adhesive which is excellent in flexibility, particularly has a high adhesive force to soft PVC, and is excellent in storage stability. To do. That is, the present invention is

(A) At least one silicon-containing group (hereinafter referred to as a reactive silicon group) having a hydroxyl group or a hydrolyzable group bonded to a silicon atom and capable of being crosslinked by forming a siloxane bond in the molecule. A polyalkylene oxide having (B) a rubber-based organic polymer which is liquid at room temperature and which has at least one functional group capable of forming a hydrogen bond with the above polyalkylene oxide in the molecule, and (C) curability containing a curing catalyst as a main component. The present invention relates to a tape-shaped or sheet-shaped pressure-sensitive adhesive material obtained by laminating a pressure-sensitive adhesive layer on a substrate obtained by curing a composition. The polyalkylene oxide (A) having a reactive silicon group as used in the present invention becomes a rubber-like substance after curing and has flexibility.

Such polyalkylene oxide (A)
The main chain of is not particularly limited as long as it has an ether bond in the molecule, but polypropylene oxide is preferable. The reactive silicon group contained in the polyalkylene oxide (A) is a well-known group and has a characteristic that it can be crosslinked even at room temperature. Examples of such reactive groups, the general ^{_{formula: X a (R 1 3-}} a) Si - [- O-Si (R 1 2-b) (X
_b ) −] _m −

[Wherein X represents a hydroxyl group or a hydrolyzable group, and R ¹ Is a monovalent hydrocarbon group having 1 to 20 carbon atoms,
a is 0, 1, 2 or 3, b is 0, 1, 2 or 3, and m is 0 or 1 to 19. However, 1 ≦ a + mb
Is. ] It is the triorganosiloxy group shown by these.

Specific examples of the hydrolyzable group include generally known groups such as a hydrogen atom, a halogen atom, an alkoxy group and an acyloxy group. Of these, the alkoxy groups are mildly hydrolyzable,
It is particularly preferable because it is easy to handle.

R ¹ Specific examples thereof include an alkyl group such as a methyl group and an ethyl group, a cycloalkyl group such as a cyclohexyl group, an aryl group such as a phenyl group, an aralkyl group such as a benzyl group, and a trimethylsiloxy group. It may also be a hydrocarbon group in which some hydrogen atoms are substituted. Of these, a methyl group is particularly preferable.

One molecule of the polyalkylene oxide (A) contains at least one, preferably 1.2 to 6 reactive silicon groups. If the number of reactive silicon groups contained in one molecule is less than 1, curing will be insufficient, which is not preferable. Further, if the number exceeds 6, the flexibility of the cured product becomes insufficient.

In the polyalkylene oxide (A), the reactive silicon group is preferably present at the molecular end. When the reactive silicon group is present at the terminal of the molecule, the molecular weight between the cross-linking points becomes large, so that there is an advantage that a cured product having flexibility and high elongation is easily obtained.

The polyalkylene oxide (A) has a molecular weight of about 500 to 50,000, particularly 1,000 to 20,000, because the polyalkylene oxide (A) needs to be liquid at room temperature. Something is preferable.

As a component used in the present invention, a rubber-type organic polymer (B) which is liquid at room temperature and has at least one functional group capable of hydrogen bonding with the polyalkylene oxide (A) in the molecule [hereinafter, referred to as liquid Rubber (B)].

The liquid rubber as referred to herein is a polymer having fluidity at room temperature and has a three-dimensional network structure by an appropriate chemical treatment, so that a cured product having the same physical properties as ordinary vulcanized rubber can be obtained. It is a substance. Specific examples of such liquid rubber include, for example, liquid polybutadiene, liquid polyisoprene, liquid styrene-butadiene rubber, liquid acrylonitrile-butadiene rubber, liquid polychloroprene, liquid polysulfide, liquid polyisobutylene, liquid butyl rubber, polybutene, or the like. However, the present invention is not limited to these. The molecular weight of the liquid rubber is about 500 to 50,000,
In particular, about 1,000 to 30,000 is preferable.

Further, the polyalkylene oxide (A)
The functional group capable of hydrogen bonding with, for example, a hydroxyl group, a carboxyl group, an amino group, an amide group, an imino group, an imide group, a ureido group, a mercapto group, a thiocarboxyl group,
Examples thereof include thioamide group and thioureido group, but are not limited thereto. These functional groups are contained in the liquid rubber molecule at least 1, preferably 1 to 20 per liquid rubber molecular weight 5,000. If the amount is less than 1, the effect of the present invention is not sufficient,
If this amount exceeds 20, the fluidity of the liquid rubber (B) deteriorates and the processing is hindered. These functional groups may be bonded to the ends of the liquid rubber molecular chain or may be bonded in the middle of the molecular chain.

The liquid rubber (B) may be used alone or in combination of two or more kinds. Among these,
Particularly, carboxyl group-modified polyisoprene and carboxyl group-modified polybutadiene are preferable because they give a pressure-sensitive adhesive base material having excellent flexibility and storage stability.

The liquid rubber (B) is used in an amount of 10 to 500 parts with respect to 100 parts of the polyalkylene oxide.
Further, 30 to 500 parts, particularly 50 to 300 parts are preferable. If this amount is 10 parts or more, the effect of the present invention is particularly large, and if it exceeds 500 parts, the mechanical strength of the cured product as the base material is lowered.

When the base material according to the present invention is desired to have mechanical strength, an appropriate amount of the crosslinking agent for the liquid rubber (B) is used. The cross-linking agent is not particularly limited as long as it reacts with the functional group of the liquid rubber (B), and a usual cross-linking agent can be used.

Examples of such a cross-linking agent include epoxy resins, metal compounds and polyamino compounds when the liquid rubber (B) is a carboxyl group-modified liquid rubber. Of these, epoxy resins are preferable in terms of the balance between pot life and curability of the curable composition. Specific examples of the epoxy resin include bisphenol A such as Epicoat 828 of Yuka Shell Epoxy Co., Ltd. and Araldite GY25O of Ciba-Geigy Co., Ltd. of Japan.
Type epoxy resin, brominated bisphenol A type epoxy resin, polyphenol type epoxy resin and the like.

Further, an appropriate amount of a curing agent can be used to accelerate the reaction between the crosslinking agent and the liquid rubber (B).
For example, in the case of an epoxy resin and a carboxyl-modified liquid rubber, a tertiary amine such as 1,2,6-tris (dimethylaminomethyl) phenol is used.

A curing catalyst is a component used together with the polyalkylene oxide (A). The curing catalyst acts on the polyalkylene oxide (A) used in the present invention to crosslink and cure it to form a stable base material composition.
The curing catalyst used together with the polyalkylene oxide (A) is not particularly limited, and a commonly used silanol condensation catalyst is used.

Specific examples of such a curing catalyst include, for example, titanic acid esters, tin carboxylates, organic zirconium compounds, reaction products of dibutyltin oxide and phthalic acid esters, chelate compounds, lead octylate, amine compounds. , Acidic phosphoric acid esters, saturated or unsaturated polyvalent carboxylic acids or their anhydrides, reaction products of amine compounds with acidic phosphoric acid esters, saturated or unsaturated polyvalent carboxylic acids or their anhydrides, other acidic catalysts, basic Known silanol catalysts such as catalysts can be mentioned. Specific examples of the titanic acid esters include tetrabutyl titanate and tetrapropyl titanate.

Specific examples of the tin carboxylates include:
Examples thereof include dibutyltin dilaurate, dibutyltin dimaleate, dibutyltin diacetate, tin octylate and tin naphthenate. Specific examples of the organic zirconium compound include zirconium tetraisopropoxide and zirconium tetrabutoxide.

Specific examples of the chelate compound include organic aluminum compounds such as aluminum trisacetylacetonate, aluminum trisethylacetoacetate and diisopropoxyaluminum ethylacetoacetate, dibutyltin diacetylacetonate, zirconium tetraacetylacetonate and titanium. Tetraacetylacetonate and the like can be mentioned.

Specific examples of the amine compound include butylamine, laurylamine, dibutylamine, dilaurylamine, dimethylbutylamine, dimethyllaurylamine, monoethanolamine, triethylenetriamine, guanidine, 2-ethyl-4-methylimidazole, 1,
8-diazabicyclo (5,4,0) undecene-7 (DBU) and the like can be mentioned. Further, the acidic phosphate ester is -O-
A phosphoric acid ester containing a P (= O) (-OH)-moiety, for example, (R ² O) _d -P (= O) (-OH) _3-d [wherein d is 1 or 2, R ² Represents an organic group] and the like. Specifically, (CH ₃ O) ₂
-P (= O) -OH, CH 3 O-P (= O) (- OH)
_{2, (C 2 H 5 O} ) 2 -P (= O) -OH, C 2 H 5 O
-P (= O) (- OH ) 2, [(CH 3) 2 CHO] -
P (= O) -OH, ( CH 3) 2 CHO-P (= O)
_{(-OH) 2, (C 4} H 9 O) 2 -P (= O) -OH,
_{C 4 H 9 O-P (} = O) (- OH) 2, (C8 H17O)
_2- P (= O) -OH, C8 H17O-P (= O) (-O
H) ₂ , (C ₁₀ H ₂₁ O) ₂ -P (= O) -OH, C ₁₀ H
_{21 O-P (= O)} (- OH) 2, (C 13 H 27 O) 2 -P
_{(= O) -OH, C 13} H 27 O-P (= O) (- O
_{H) 2, (HO-C} 6 H 12 O) 2 -P (= O) -OH,
_{HO-C 6 H 12 O-} P (= O) (- OH) 2, [(CH
_{2 OH) (CHOH) O]} 2 -P (= O) -OH, (C
_{H 2 OH) (CHOH) O} -P (= O) (- OH) 2,
_{[(CH 2 OH) (CHOH} ) C 2 H 4 O] 2 -P (=
_{O) -OH, (CH 2 OH} ) (CHOH) C 2 H 4 O-
P (= O) (-OH) ₂ , etc. are mentioned.

Among these, amine compounds, acidic phosphoric acid esters, saturated or unsaturated polyvalent carboxylic acids or their anhydrides, reaction products of amine compounds and acidic phosphoric acid esters, amine compounds and saturated or unsaturated polyvalent acids. A reaction product with a carboxylic acid or an anhydride thereof is preferable from the viewpoint that a pressure-sensitive adhesive having good flexibility and excellent low-temperature characteristics can be obtained.

The amount of these curing catalysts used is preferably 0.1 to 10 parts, especially 0.5 to 8 parts, per 100 parts of polyalkylene oxide (A). If this amount is less than 0.1 part, the catalytic effect will not be sufficient, and if it exceeds 10 parts, the curing will be too fast and the coating workability on the support will be poor. Other components used include a filler used for adjusting the physical properties of the base material and a solvent for adjusting the viscosity of the curable composition for the base material.

Specific examples of such a filler include silica fine powder, calcium carbonate, clay, talc, titanium oxide, zinc oxide, diatomaceous earth, barium sulfate, and the like.
Examples thereof include carbon black and organic or inorganic spherical micro hollow bodies.

Examples of inorganic spherical micro hollow bodies include glass spherical micro hollow bodies, silica balloons, fly ash balloons, and shirasu balloons. Examples of the organic spherical micro hollow bodies include phenol resin balloons. These may be used alone or in combination of two or more. Further, those obtained by treating the surface of these spherical micro hollow bodies with a silane compound, polypropylene glycol or the like can also be used. These micro hollow bodies are used to reduce the weight of the cured product without impairing the flexibility, elongation and mechanical strength of the cured product.

The amount of these inorganic and organic spherical micro hollow bodies used is preferably 3 to 50 parts, more preferably 5 to 30 parts, per 100 parts of polyalkylene oxide (A). If this amount is less than 3 parts, weight reduction cannot be sufficiently achieved,
When it exceeds 50 parts, the elongation and strength of the base material are deteriorated, which is not preferable.

Further, a tackifying resin can be used for controlling the flexibility of the base material and increasing the strength. The tackifying resin is not particularly limited, and any tackifying resin that is commonly used can be used.

Specific examples of such tackifying resins include phenol resins, modified phenol resins, terpene-phenol resins, petroleum resins, rosin ester resins, low molecular weight polystyrene resins and terpene resins. These may be used alone or in combination of two or more. Of these, phenol resin-based and phenol-containing resin-based resins are particularly preferable because they easily exhibit flexibility, high elongation and high strength.

The tackifying resin is used in an amount of 0 to 140 parts, especially 5 parts, based on 100 parts of the polyalkylene oxide (A).
It is preferably ˜80 parts. If this amount exceeds 140 parts by weight, the elastic modulus becomes high, and rubber-like properties cannot be sufficiently obtained, which is not preferable.

Further, an antioxidant, an ultraviolet absorber, a pigment,
Surfactants and the like are used according to each purpose.
In addition, additives other than the above-mentioned additives can be used if necessary.

In the present invention, the polyalkylene oxide (A) may be mixed with other components by using a mixer such as a Banbury mixer, a kneader, a roll or a planetary mixer. When it is used, it can be easily mixed by pulverizing it into a fine powder of about 1 to 100 μm in advance. The fine powder of the tackifying resin does not necessarily have to be in a uniformly dissolved state before coating, and may exist in the rubber-based organic polymer as small particles in a non-uniformly dispersed state.

The production of a cured sheet from the curable composition prepared as described above is usually accomplished by applying the composition to a silicone release film or the like, followed by drying and curing.

The coating method is not particularly limited, and the curable composition may be coated using an ordinary coater. After the coating, a drying / curing step is started, but the drying and curing conditions are from room temperature to 150 ° C. for about 0.5 to 30 minutes. The tape-shaped or sheet-shaped pressure-sensitive adhesive of the present invention,
The cured sheet thus obtained is used as a base material, and a pressure-sensitive adhesive layer is laminated on the base material to be manufactured.

The pressure-sensitive adhesive of the pressure-sensitive adhesive layer used in the present invention is not particularly limited, and examples thereof include solvent-based, emulsion-based or solvent-free acrylic ester copolymer-based adhesives, natural rubber and synthetic. Solvent type or hot melt type adhesives obtained by blending a tackifying resin with rubber, and other pressure sensitive adhesives are used. Among them, acrylic ester copolymer-based pressure-sensitive adhesives are preferable because they are excellent in initial and final adhesive strength, weather resistance and aging resistance. Furthermore, an acrylic acid ester copolymer-based pressure-sensitive adhesive containing a carboxyl group-containing polymer as a main component is particularly preferable because it has excellent chemical anchoring effect on the surface of an adherend and adhesive properties.

As the pressure-sensitive adhesive, a tackifying resin can be used for the purpose of enhancing the adhesive force. As the tackifying resin,
There is no particular limitation, and any commonly used tackifying resin can be used, but a phenol resin-based resin or a phenol-containing resin-based resin is particularly preferable. These may be used alone or in combination of two or more. The pressure-sensitive adhesive of the present invention can also be produced by applying a pressure-sensitive adhesive to a substrate, drying and curing it, but it is not limited to these methods. The thickness of the pressure-sensitive adhesive layer thus formed is not particularly limited, but is usually 5 μm to 1
The thickness is about mm, preferably 25 to 200 μm.

The pressure-sensitive adhesive thus obtained has an M ₁₀₀ (tensile stress at 100% elongation) of 10 kg / at room temperature.
cm ² It has the following flexibility and favorable adhesive properties such as peel adhesive strength, shear adhesive strength, and high retention rate, and it is easy to mix colored materials including black in appearance and relatively inexpensive in terms of cost. Therefore, there are some products for automobiles (for example,
Adhesion of side moldings, emblem moldings, weather strips, etc.), assembling and fixing of electric products, indoor furniture, display boards, building materials, etc., and their industrial value is very high.

[0044]

EXAMPLES Next, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. Examples 1, 2, 3, 4 per molecule average of 1.5 amino dimethoxy silyl _{group: -Si (CH 3) (OCH} 3) 2

Polypropylene oxide having an average molecular weight of 7,500, having a carboxyl group in the molecular chain on average of about 1
Liquid polyisoprene having zero average molecular weight of 25,000 [Kuraray Co., Ltd., Kuraprene LIR-410], hindered phenolic antioxidant (Ouchi Shinko Chemical Co., Ltd.)
Made: Nocrac NS-6), UV absorber (Ciba Geigy Co .: Tinuvin 327), carbon black (Asahi Carbon Co., Ltd .: # 80) were weighed in the prescribed amounts as shown in Table 1, and 3 paints were applied. The mixture was kneaded with a roll four times and mixed. Thereafter, Shirasu balloons (Idjichi Kasei Co., Ltd.: Win write MSB5011) and dilauryl monomethylamine as a curing catalyst (manufactured by Kao Corp.: FARMIN M ₂ -20) and di -2
A predetermined amount of an equal mixture of ethylhexyl phosphate [DP-8R manufactured by Daihachi Chemical Industry Co., Ltd.] was added and mixed, and degassed under reduced pressure. The obtained curable composition was applied on a silicone-released PET film (Toyo Metallizing Co., Ltd .: Therapy Q-1) with a doctor blade to a thickness of 1.1 mm, and then at 140 ° C. A heat-curing treatment was performed for 20 minutes to obtain a cured sheet as a base material.

On the other hand, the pressure sensitive adhesive layer was prepared as follows. That is, 40% of the copolymer of 90% by weight of butyl acrylate, 8% by weight of acrylic acid and 2% by weight of vinyl acetate.
To 100 parts by weight of a toluene solution, 2 parts by weight of phenyl diisocyanate was added as a cross-linking agent and mixed, and a silicone release paper (Lintec Co., Ltd.) was used by using a doctor blade.
(Manufactured by WBG-70EN) so that the adhesive thickness is 100 μm, and dried at 100 ° C. for 5 minutes. The double-sided adhesive tape of the present invention was obtained by laminating the obtained pressure-sensitive adhesive layer on both sides of the base material so that air bubbles did not enter.

The flexibility of the pressure-sensitive adhesive is further measured by tensile properties (dumbbell JIS No. 3, tensile speed 3 after aging at 65 ° C. for 7 days).
It was evaluated by measuring 00 mm / min, measuring temperature 23 ° C., using autograph).

Regarding the storage stability, the obtained double-sided adhesive tape was treated at 65 ° C. for a predetermined time, and then a 180 ° peel strength was measured using a soft PVC (polyvinyl chloride) plate as an adherend.
As for the 180 ° peeling strength, a double-sided adhesive tape piece having a width of 25 mm, which is lined with a PET film having a thickness of 50 μm, is prepared, and is bonded to a soft PVC (polyvinyl chloride) plate having a thickness of 1.2 mm which is previously lined with a steel plate. . After leaving it at room temperature for 1 day, use an autograph to make it 50 mm under an atmosphere of 80 ° C.
It was measured at a pulling speed of 1 / min. The results are shown in Table 1. Example 5

In Example 1, Claprene LIR-4
Example 1 was repeated except that 0.5 part of an epoxy resin (Yukaka Shell Epoxy Co., Ltd .: Epicoat 828) was further added as the crosslinking agent of 10. The results of measuring the same items as in Example 1 are shown in Table 1. Example 6

Instead of Claprene LIR-410 of Example 1, liquid 1,2-polybutadiene having carboxyl groups at both ends of the molecular chain and an average molecular weight of 1,350 (manufactured by Nippon Soda Co., Ltd., NISSO-PB C-1000). ) Was carried out in the same manner as in Example 1 except that 100 parts were used. The results of measuring the same items as in Example 1 are shown in Table 1. Example 7

Instead of Claprene LIR-410 of Example 1, liquid 1,2-polybutadiene having carboxyl groups at both ends of the molecular chain and having an average molecular weight of 2,000 (manufactured by Nippon Soda Co., Ltd., NISSO-PB G-2000). ) Was carried out in the same manner as in Example 1 except that 100 parts were used. The results of measuring the same items as in Example 1 are shown in Table 1. Comparative Example 1 The procedure of Example 1 was repeated, except that Craprene LIR-410 of Example was not used. The results of measuring the same items as in Example 1 are shown in Table 1. Comparative example 2

Instead of Claprene LIR-410 of the example, liquid polyisoprene having an average molecular weight of 29,000 having no functional group [Kuraprene LIR-3 manufactured by Kuraray Co., Ltd.]
0] was used in the same manner as in Example 1. The results obtained by measuring the same items as in Example 1 are
Shown in the table.

[0053]

[Table 1]

Considering the above results, the pressure-sensitive adhesive of the present invention has a low M ₁₀₀ , excellent flexibility, and soft PV.
It was found that the initial high temperature adhesive strength to C and the storage stability were excellent. In addition, when the liquid polyisoprene having no functional group was used in Comparative Example 2, the base material and the pressure-sensitive adhesive layer were peeled off (base material peeling), and the adhesive strength was remarkably low.

[0055]

The pressure-sensitive adhesive of the present invention has excellent flexibility,
Moreover, it has excellent initial high temperature adhesive strength to soft PVC and storage stability.

Claims (3)

[Claims] 1. A polyalkylene oxide having (A) at least one silicon-containing group in a molecule, which has a hydroxyl group or a hydrolyzable group bonded to a silicon atom and can be crosslinked by forming a siloxane bond, ) Obtained by curing a rubber-based organic polymer which has at least one functional group capable of forming a hydrogen bond with the polyalkylene oxide in the molecule and which is liquid at room temperature, and (C) a curable composition containing a curing catalyst as a main component. A tape-shaped or sheet-shaped pressure-sensitive adhesive obtained by laminating a pressure-sensitive adhesive layer on the obtained substrate. 2. The rubber organic polymer (B) comprises a hydroxyl group, a carboxyl group, an amino group, an amide group, an imino group, an imide group, a ureido group, a mercapto group, a thiocarboxyl group,
The tape-shaped or sheet-shaped pressure-sensitive adhesive according to claim 1, which is a polyisoprene having at least one thioamide group or at least one thioureido group in a molecule, polybutadiene, or a copolymer mainly composed of these. 3. The tape-shaped or sheet-shaped pressure-sensitive adhesive material according to claim 1, wherein the curable composition contains a crosslinking agent for the rubber-based organic polymer (B).