JP5703108B2 - Adhesive composition for organic fiber cord, rubber reinforcing material, tire and bonding method using the same - Google Patents

Description

  The present invention relates to an adhesive composition for an organic fiber cord, and a rubber reinforcing material, a tire and an adhesion method using the same, and more specifically, does not contain resorcin and formalin, and is an organic material having good adhesion and environment, in particular, working environment. The present invention relates to an adhesive composition for fiber cords, a rubber reinforcing material using the same, a tire, and a bonding method.

  Conventionally, an RFL (resorcin / formalin / latex) adhesive containing resorcin, formalin and rubber latex has been used for bonding a tire cord made of polyester fiber or the like to a rubber composition for tires, and thermosetting the adhesive. It is known that the adhesive force is ensured by (see Patent Documents 1 to 3).

  Further, the adhesion can be further improved by using a resorcin formalin resin obtained by initial condensation of resorcin and formalin (see Patent Documents 4 and 5) or pretreating a tire cord made of polyester fiber with an epoxy resin. It has been known.

However, although formalin is an important raw material for crosslinking resorcin, it is suspected to be carcinogenic, so in recent years it has been controlled and used in the atmosphere during use, taking into account the environment, especially the working environment. There is a need to reduce the amount. In addition, resorcin is suspected as an environmental hormone, and a reduction in the amount of use is required.
Therefore, an adhesive composition for organic fiber cords that does not contain resorcinol and formalin and has good adhesion and environment, particularly work environment, and a rubber reinforcing material, tire, and bonding method using the same have been proposed. Since the curing of the agent is slow, the adhesive is often dried and adhered to a curing device, and the productivity is low, so that it is not put into practical use (see Patent Document 6).

JP 58-2370 A (Claims etc.) JP-A-60-92371 (Claims) JP-A-60-96674 (Claims etc.) JP 63-249784 A (Claims etc.) Japanese Examined Patent Publication No. 63-61433 (Claims) JP 2010-255153 A (Claims etc.)

However, these adhesive compositions for organic fiber cords that do not contain resorcin and formalin affect the heat-resistant adhesion performance of the adhesive components used, so the organic fiber cord is coated with the adhesive composition to form an adhesive layer. It was difficult to achieve compatibility with a decrease in workability during formation.
Under such circumstances, the present invention does not contain resorcin and formalin, and has an adhesive property and environment, particularly an organic fiber cord adhesive composition having good working environment, and a rubber reinforcing material, a tire and a bonding method using the same. It is a problem to provide.

As a result of intensive studies to achieve the above object, the present inventor has found that the above problems can be solved and the object can be achieved by using a specific rubber latex as an adhesive for organic fiber cords. It was. The present invention has been completed based on such findings.
That is, the present invention
[1] In an organic fiber cord adhesive composition containing a blocked isocyanate compound (A), an epoxy compound (B), and a rubber latex (C), the rubber latex (C) is a butadiene monomer 35 to 75. Copolymer rubber latex (a) obtained by emulsion polymerization of 15% by mass, vinyl pyridine monomer 15-30% by mass and styrene monomer 10-55% by mass (in terms of solid content) And butadiene monomer 3 to 20% by mass, styrene monomer 75 to 96.9% by mass, ethylene unsaturated carboxylic acid 0.1 to 10% by mass, and other copolymerizable monomers 0 to An organic fiber cord comprising 10 to 50 parts by mass (in terms of solid content) of a copolymer rubber latex (b) having a glass transition temperature of 40 to 90 ° C. obtained by emulsion polymerization of 20% by mass. Adhesive composition,
[2] The adhesive composition for organic fiber cords according to [1], further comprising an amine curing agent (D),
[3] The ratio of the total mass of the blocked isocyanate compound (A), the epoxy compound (B), and the amine curing agent (D) to the mass of the rubber latex (C) {(A) + (B) + (D)} / (C) is an adhesive composition for organic fiber cords according to the above [1] or [2], which is 0.1 or more and 1.0 or less,
[4] An organic fiber cord for reinforcing a tire formed by twisting organic fibers is coated with the organic fiber cord adhesive composition of any one of [1] to [3] to form an adhesive layer, An adhesion method characterized by adhering the organic fiber cord and rubber via the adhesive composition for organic fiber cords,
[5] The bonding method according to [4], wherein the organic fiber cord adhesive composition is impregnated with the organic fiber cord to form the adhesive layer.
[6] After the adhesive layer is formed, drying treatment and heat treatment are performed, and further, the organic fiber cord is embedded in unvulcanized rubber, and the unvulcanized rubber is vulcanized to obtain the organic fiber cord. The bonding method according to [4] or [5] above, wherein rubber is bonded via the adhesive composition for organic fiber cords,
[7] The bonding method according to any one of [4] to [6], wherein the organic fiber cord is made of polyester or nylon.
[8] A rubber reinforcing material comprising an organic fiber cord for reinforcing a tire formed by twisting an organic fiber and a rubber covering the organic fiber cord, wherein the organic fiber cord and the rubber are the above-mentioned [1] ]-[3] A rubber reinforcement characterized by being bonded using the adhesive composition for organic fiber cords,
[9] The rubber reinforcing material according to [8], wherein the organic fiber cord is made of polyester or nylon;
[10] A tire using the rubber reinforcing material according to [8] or [9] above,
Is to provide.

  According to the present invention, the above configuration does not contain resorcinol and formalin, and adhesion for organic fiber cords is excellent in adhesiveness and environment, in particular, working environment and excellent in initial adhesiveness, heat-resistant adhesiveness and bending fatigue property. It is possible to provide an agent composition, a rubber reinforcing material having the above performance, a tire, and an adhesion method using the same.

Hereinafter, preferred embodiments of the present invention will be described in detail.
The adhesive composition for organic fiber cords of the present invention comprises a blocked isocyanate compound (A), an epoxy compound (B), and a rubber latex (C).
Furthermore, the adhesive composition for organic fiber cords preferably contains an amine curing agent (D). Thereby, in the process of adhesion | attachment of an organic fiber cord and rubber | gum, resorcinol and formalin are not used substantially, but the adhesive force more than equivalent can be obtained with one bath. Even when organic fiber cords such as polyester fibers and aramid fibers that are difficult to bond are used, they can be used without pretreatment with an epoxy compound.

  The blocked isocyanate compound (A) used in the adhesive composition for organic fiber cords of the present invention is obtained by addition reaction of a known blocking agent to the isocyanate group of the organic polyisocyanate compound. This blocked isocyanate does not react with water at room temperature, but when heated, the blocking agent is dissociated to regenerate active isocyanate groups. Here, examples of the organic polyisocyanate compound include methylene diphenyl polyisocyanate and polymethylene polyphenyl polyisocyanate. Moreover, as blocking agents, phenols such as phenol, thiophenol, chlorophenol, cresol, resorcinol, p-sec-butylphenol, p-tert-butylphenol, p-sec-amylphenol, p-octylphenol, p-nonylphenol, etc. Secondary or tertiary alcohols such as isopropyl alcohol and tert-butyl alcohol; aromatic secondary amines such as diphenylamine and xylidine; phthalimides; lactams such as δ-valerolactam; ε-caprolactam Active methylene compounds such as malonic acid dialkyl ester, acetylacetone and acetoacetic acid alkyl ester; oximes such as acetoxime, methylethylketoxime and cyclohexanone oxime; 3-hydride Examples include basic nitrogen compounds such as loxypyridine and acidic sodium sulfite.

  As the epoxy compound of the component (B) used in the organic fiber cord adhesive composition of the present invention, diethylene glycol diglycidyl ether, polyethylene diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, glycerol polyglycidyl ether, trimethylolpropane polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythiol polyglycidyl ether, diglycerol polyglycidyl ether, sorbitol poly Reaction product of polyhydric alcohols such as glycidyl ether and epichlorohydrin; phenol novolac type epoxy resin, cresol novolac type Novolak epoxy resins such as carboxymethyl resin; bisphenol A type epoxy resins.

The rubber latex of component (C) used in the adhesive composition for organic fiber cords of the present invention includes 35 to 75% by mass of a butadiene monomer, 15 to 30% by mass of a vinylpyridine monomer, and a styrene monomer. 50-90 parts by mass (solid content conversion) of rubber latex (a) obtained by emulsion polymerization of 10-55% by mass of the product, 3-20% by mass of butadiene monomer, 75-96.9 of styrene monomer The glass transition temperature Tg obtained by emulsion polymerization of 0.1% by mass to 0.1% by mass of an ethylenically unsaturated carboxylic acid monomer and 0 to 20% by mass of another copolymerizable monomer is 40 to 90 ° C. It is necessary to consist of 10 to 50 parts by mass (in terms of solid content) of the copolymer rubber latex (b).
Further, the rubber latex of the component (C) is composed of (a) 35 to 75% by mass of a butadiene monomer, 15 to 30% by mass of a vinylpyridine monomer, and 10 to 55% by mass of a styrene monomer. (B) 3-20% by mass of butadiene monomer, 75-96.9% by mass of styrene monomer, 0.1% of ethylenically unsaturated carboxylic acid monomer It is preferably composed of the copolymer latex having a double structure obtained by emulsion polymerization of a monomer composed of 10 to 10% by mass and another monomer capable of copolymerization of 0 to 20% by mass.
The initial adhesiveness of the adhesive composition for organic fiber cords of the present invention tends to be inferior when the blending amount of the butadiene monomer is less than the above range or when the blending amount of the styrene monomer is more than the above range. In addition, the adhesive composition for organic fiber cords which does not contain resorcin and formalin according to the present invention can have a higher glass transition temperature Tg than conventional RFL adhesive compositions, thereby improving workability and heat resistant adhesiveness. Bending fatigue resistance is also improved while ensuring. However, the bending fatigue property tends to deteriorate when the glass transition temperature of the copolymer rubber latex (b) is higher than the glass transition temperature range.

  The butadiene-vinylpyridine-styrene copolymer is a ternary copolymer of a conjugated butadiene compound, a vinylpyridine compound, and a styrene compound. Here, the vinylpyridine monomer includes vinylpyridine and a substituted vinylpyridine in which a hydrogen atom in the vinylpyridine is substituted with a substituent. Examples of the vinylpyridine compounds include 2-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine, 2-methyl-5-vinylpyridine, 5-ethyl-2-vinylpyridine, etc. Among these, 2 -Vinylpyridine is preferred. These vinylpyridine monomers may be used alone or in combination of two or more.

  Examples of the conjugated butadiene monomer include aliphatic conjugated butadiene compounds such as 1,3-butadiene and 2-methyl-1,3-butadiene. Among these, 1,3-butadiene is preferable. These conjugated butadiene monomers may be used alone or in combination of two or more.

  The styrenic monomer includes styrene and substituted styrene in which a hydrogen atom in the styrene is substituted with a substituent. Examples of the styrene monomer include styrene, α-methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2,4-diinopropylstyrene, 2,4-dimethylstyrene, 4-t -Butyl styrene, hydroxymethyl styrene, etc. are mentioned, Among these, styrene is preferable. These styrenic monomers may be used alone or in combination of two or more.

The method for producing the carboxyl group-modified styrene-butadiene copolymer latex (b) used in the present invention is an ethylenically unsaturated carboxylic acid monomer such as acrylic acid, methacrylic acid, cinnamic acid, itaconic acid, fumaric acid. It can be obtained by copolymerizing at least one kind such as maleic acid, styrene, butadiene and other monomers copolymerizable as required. As the ethylenically unsaturated carboxylic acid monomer, acrylic acid is particularly preferable.
Moreover, the glass transition temperature of this copolymer needs to be 40-90 degreeC.

In the adhesive composition of the present invention, the styrene-butadiene copolymer latex is a carboxy-modified latex, whereby the negative charge on the particle surface is increased to form a stable electric double layer, and the mechanical stability of the rubber latex. In addition, chemical stability is improved, and the amount of gum-up generated during the impregnation treatment with the adhesive liquid is reduced. In particular, chemically bonded carboxyl groups present on the surface of the particles are formed around the particles, which increases the thickness of the electric double layer, stabilizes the latex particles as a colloid, and improves the mechanical stability of the latex.
The mechanical stability of the adhesive liquid using the carboxy-modified styrene-butadiene terpolymer is improved, and particularly in the case of an adhesive containing natural rubber latex, the mechanical stability is usually lowered, but the carboxy-modified styrene-butadiene is reduced. It improves by using together with ternary copolymer latex.

In the present invention, it is the ratio of the total mass of the blocked isocyanate compound (A), the epoxy compound (B) and the amine curing agent (D) to the mass of the rubber latex (C) {(A) + (B) + (D)} / (C) is preferably 0.1 or more and 1.0 or less. If this ratio is less than 0.1, the effect of the epoxy compound and the blocked isocyanate compound may not be sufficiently obtained. On the other hand, if this ratio exceeds 1.0, sufficient adhesion may not be obtained. Is not preferable.
As the amine curing agent for the epoxy compound as the component (D), various amine compounds such as aliphatic amines and aromatic amine-modified amines are used. For example, as the chain aliphatic polyamine, diethylenetriamine (DTA), triethylenetetramine (TTA), diethylaminopropylamine (DPDA), as the cyclic aliphatic polyamine, piperazine, N-aminoethylpiperazine, (N-AEP), Mensendiamine (MDA), fatty aromatic amines include m-xylenediamine (M-XDA), aromatic amines include metaphenylenediamine (MPDA), diaminodiphenylmethane (DDM), diaminodiphenylrulphone (DDS), and the like. . Of these, piperazine is preferable.

  Moreover, the adhesive composition for organic fiber cords of the present invention is the ratio of the mass of the blocked isocyanate compound to the mass of the epoxy compound (the mass of the blocked isocyanate compound / the mass of the epoxy compound) = (A) / (B ) Is preferably 0.1 or more and 30 or less, and more preferably 0.1 or more and 10 or less. If the ratio is less than 0.1, the effect of the blocked isocyanate compound may not be sufficiently obtained. On the other hand, if the ratio is more than 30, sufficient adhesive force may not be obtained, which is not preferable. .

  The rubber reinforcing material of the present invention is a rubber reinforcing material comprising an organic fiber cord for reinforcing a tire formed by twisting organic fibers and a rubber covering the organic fiber cord, and the organic fiber cord and the rubber are: It is bonded by using the adhesive composition for organic fiber cords of the present invention. Here, the material of the organic fiber cord is not particularly limited, but a thermoplastic is preferable. Examples of the thermoplastics include polyamides, polyesters, polyolefins such as polypropylene and polyethylene, polycarbonates, polyacrylates, styrene resins such as ABS resins, and vinyl chloride resins. Among these, polyesters or nylons are preferable, It is particularly preferable to use polyester which has high mechanical strength and is relatively difficult to adhere to rubber by a normal method.

As an adhesion method of the present invention, an organic fiber cord for reinforcing a tire formed by twisting organic fibers is coated with the adhesive composition for organic fiber cords to form an adhesive layer, and the organic fiber cord Rubber can be bonded via the adhesive composition for organic fiber cords.
In the bonding method of the present invention, examples of the method for forming the adhesive layer include dipping, brushing, casting, spraying, roll coating, knife coating, and the like. It is preferable to impregnate the cord adhesive composition to form an adhesive layer. Compared with the two-stage method in which the epoxy compound is attached in the first step and the blocked isocyanate compound and rubber latex are attached in the second step, the dipping is a one-step method, so an adhesive layer is formed at a lower cost. it can. Here, the thickness of the adhesive layer is preferably 0.5 to 50 μm, and more preferably 1 to 10 μm.
Here, the density | concentration of the adhesive composition of an impregnation liquid is 5-20 mass% (solid content conversion), Preferably it is 7.5-15 mass%. After forming the adhesive layer, drying treatment is performed at 120 ° C. to 180 ° C. for 0.5 to 3 minutes, and heat treatment is performed at 180 ° C. to 260 ° C. for 0.5 to 3 minutes. Further, the organic fiber cord is unvulcanized rubber. The organic fiber cord and the rubber are preferably bonded to each other through the adhesive composition for organic fiber cords after being embedded in the unvulcanized rubber. Thereby, adhesiveness can be made more favorable.
Furthermore, it is particularly preferable that the organic fiber cord is made of polyester or nylon from the viewpoint of effectively exhibiting the effect.

  On the other hand, the coated rubber constituting the rubber reinforcing material of the present invention is preferably formed by blending a rubber component with a compounding agent usually used in the rubber industry. Here, the rubber component is not particularly limited. For example, in addition to natural rubber, polyisoprene rubber (IR), polybutadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), acrylonitrile butadiene rubber (NBR). Conjugated diene-based synthetic rubbers such as chloroprene rubber (CR) and butyl rubber (IIR), ethylene-propylene copolymer rubber (EPM), ethylene-propylene-diene copolymer rubber (EPDM), polysiloxane rubber, etc. Among these, natural rubber and conjugated diene synthetic rubber are preferable. Moreover, these rubber components may be used individually by 1 type, and may be used in combination of 2 or more type.

  Vulcanization of the rubber component includes, for example, sulfur, tetramethyltyrarium disulfide, tyrarium polysulfide compounds such as dipentamethylenetyrarium tetrasulfide, 4,4-dithiomorpholine, p-quinonedioxime, p, p ′. -Dibenzoquinone dioxime, cyclic sulfur imide, and peroxide can be used as a vulcanizing agent, and sulfur is preferably used as a vulcanizing agent.

  In addition, various compounding agents such as fillers such as carbon black, silica, and aluminum hydroxide that are usually used in the rubber industry, vulcanization accelerators, anti-aging agents, softening agents, and the like can be appropriately mixed with the rubber component. it can. Furthermore, it is good also as a composite_body | complex with the particle | grains, fiber, cloth, etc. of various materials.

  The tire of the present invention preferably uses the rubber reinforcing material of the present invention and is used for a carcass or a belt reinforcing layer. The tire of the present invention is excellent in durability since a rubber article having high durability is used.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.
In addition, about the adhesiveness of this invention, it calculated | required with the following method about the glass transition temperature (Tg) of the rubber component of initial stage adhesiveness, heat-resistant adhesiveness, bending fatigue property, and copolymer rubber latex (b).
(Initial adhesion)
The adhesive strength of the obtained adhesive was measured according to JIS K6301 and evaluated as the initial adhesive strength. The adhesive strength is shown as an index with the adhesive strength of the conventional example (RFL type) shown in Table 2 as 100, and the larger the value, the better the result. The results are also shown in Table 1 below.
(Heat resistant adhesiveness)
Subsequently, the sample was placed in a test piece oven similar to that obtained for the initial adhesive strength and allowed to stand at 160 ° C. for 3 hours. This test piece was similarly measured according to the above JIS K6301 and evaluated as heat resistant adhesive strength. The heat-resistant adhesive strength is indicated by an index with the adhesive strength of the conventional example (RFL type) shown in Table 2 as 100, and the larger the numerical value, the better the result. The results are also shown in Table 1 below.
Further, bending fatigue resistance was evaluated by the following method.
(Bending fatigue)
Adhesive treatment cords are arranged at 50 / 5cm, and the same unvulcanized rubber 0.4mm sheet used in the above adhesion test is laminated from both sides, 5cm wide x 60cm long rubber topping A sheet was produced. An unvulcanized compounded rubber sheet having a thickness of 3 mm is sandwiched between two such topping sheets, and an unvulcanized compounded rubber sheet is laminated on the upper and lower surfaces so that the total thickness of the sample is 15 mm. Was fixed and vulcanized under a constant length at 145 ° C. for 40 minutes under a pressure of 20 kg / cm ² to prepare a sample for bending fatigue resistance test. Next, this sample was hung on a pulley having a diameter of 60 mm, a load of 150 kg was applied from both ends, and bending was repeated 5000 times per hour under an atmospheric temperature of 120 ° C. Removed after bending 1 million times, out of the two fiber cord layers, take out the cord on the side that contacts the pulley (the side subjected to repeated compression strain), measure its breaking strength, and the strength of the new article before the bending test of that value The bending fatigue property of the cord was expressed by the retention ratio (%) relative to.
(Glass transition temperature; Tg)
The glass transition temperature (Tg) of the rubber component (solid content) of the (C) component (b) copolymer latex shown in Table 1 is measured by ASTM D3418 using a DuPont 910 type differential scanning calorimeter (DSC). It was measured according to the method described in -82, and the extrapolated onset temperature when each copolymer was measured; Tf was defined as the glass transition temperature of the corresponding copolymer component; Tg.

(Examples 1-2, Comparative Examples 1-5 and Conventional Examples)
A polyester tire cord (made of polyester, 1670 dtex / 2, twist number 39 × 39/10 cm: two 1670 dtex polyester fibers twisted at a twist number 39 × 39/10 cm) was prepared. Adhesive compositions of Example 1 and Comparative Examples 1 to 5 were prepared with the formulation shown in Table 1 below, and an aqueous adhesive solution containing 20% by mass of the adhesive composition was prepared. The prepared tire cord was dipped in the aqueous adhesive solution for 1 minute and pulled up to attach the aqueous adhesive solution to the tire cord.

The tire cord to which the adhesive aqueous solution was adhered was dried at 180 ° C. for 1 minute. Then, using a heat treatment machine, the tire cord to which the adhesive adhered was applied with a tension of 1-2 kg / piece (cord tension) and heat treated at 240 ° C. for 2 minutes to produce a tire cord to which the adhesive was adhered. .
As a conventional example, a conventional tire cord was manufactured using a conventional resorcin / formalin / latex adhesive as an adhesive aqueous solution. The blending composition is shown in Table 2, and the blending composition of the coated rubber is shown in Table 3.

［注］
＊１）ブロックドイソシアネート化合物（第一工業製薬（株）製、「エラストロンＢＮ２７」、固形分濃度３０％、メチレンジフェニルの分子構造を含む熱反応型水性ウレタン樹脂）
＊２） エポキシ化合物（ナガセケムテックス（株）製、「デナコールＥＸ６１４Ｂ」、ソルビトール・ポリグリシジルエーテル）
＊３）アミン硬化剤：ピペラジン
＊４）エチレン系不飽和カルボン酸：アクリル酸

[note]
* 1) Blocked isocyanate compound (Daily Kogyo Seiyaku Co., Ltd., “Elastolon BN27”, solid content concentration 30%, heat-reactive aqueous urethane resin containing methylenediphenyl molecular structure)
* 2) Epoxy compound (manufactured by Nagase ChemteX Corporation, “Denacol EX614B”, sorbitol polyglycidyl ether)
* 3) Amine curing agent: piperazine * 4) Ethylenically unsaturated carboxylic acid: Acrylic acid

［注］
＊５）ビニルピリジン・スチレン・ブタジエン共重合ラテックス：日本ゼオン（株）製、商品名「Ｎｉｐｏｌ２５１８ＦＳ」固形分４０．５質量％
＊６）スチレン・ブタジエン共重合体ラテックス：日本ゼオン（株）製、「ＮｉｐｏｌＬＸ１１０」固形分４０．３質量％］

[note]
* 5) Vinylpyridine / styrene / butadiene copolymer latex: manufactured by Nippon Zeon Co., Ltd., trade name “Nipol 2518FS”, solid content: 40.5% by mass
* 6) Styrene-butadiene copolymer latex: "Nipol LX110" solid content 40.3% by mass, manufactured by Nippon Zeon Co., Ltd.

The present invention does not contain resorcin and formalin, and has an adhesive composition for organic fiber cords having excellent adhesiveness and environment, in particular, good working environment and excellent initial adhesiveness, heat-resistant adhesiveness and bending fatigue resistance, and the same. A rubber reinforcing material, a tire, and a bonding method having the above performance can be provided.
The rubber reinforcing material of the present invention is preferably used as a carcass or a belt reinforcing layer.

Claims (10)

In the adhesive composition for organic fiber cords including the blocked isocyanate compound (A), the epoxy compound (B), and the rubber latex (C), the rubber latex (C) is a butadiene monomer in an amount of 35 to 75% by mass, Copolymer rubber latex (a) obtained by emulsion polymerization of 15-30% by mass of vinylpyridine monomer and 10-55% by mass of styrene monomer, and butadiene type 3 to 20% by weight of monomer, 75 to 96.9% by weight of styrene monomer, 0.1 to 10% by weight of ethylenically unsaturated carboxylic acid, and 0 to 20% by weight of other copolymerizable monomers Ri copolymer rubber latex having a glass transition temperature obtained by emulsion polymerization is 40 to 90 ° C. (b) 10 to 50 parts by weight (solid basis) Tona, Do include resorcin and formalin The organic fiber cord adhesive composition.   Furthermore, the adhesive composition for organic fiber cords of Claim 1 containing an amine hardening | curing agent (D).   It is the ratio of the total mass of the (blocked) isocyanate compound (A), the epoxy compound (B) and the amine curing agent (D) to the mass of the rubber latex (C) {(A) + (B) + ( D)} / (C) is 0.1 or more and 1.0 or less, The adhesive composition for organic fiber cords of Claim 1 or 2.   An organic fiber cord for reinforcing a tire formed by twisting organic fibers is coated with the adhesive composition for organic fiber cords according to any one of claims 1 to 3 to form an adhesive layer, and the organic A bonding method comprising bonding a fiber cord and rubber through the adhesive composition for organic fiber cords.   The adhesion method according to claim 4, wherein the adhesive layer is formed by impregnating the organic fiber cord adhesive composition with the organic fiber cord.   After forming the adhesive layer, drying treatment and heat treatment, further embedding the organic fiber cord in an unvulcanized rubber, vulcanizing the unvulcanized rubber, the organic fiber cord and the rubber, The adhesion method according to claim 4 or 5, wherein adhesion is performed through the organic fiber cord adhesive composition.   The adhesion method according to claim 4, wherein the organic fiber cord is made of polyester or nylon.   A rubber reinforcing material comprising an organic fiber cord for reinforcing a tire formed by twisting an organic fiber and a rubber covering the organic fiber cord, wherein the organic fiber cord and the rubber are defined in claims 1 to 3. A rubber reinforcing material which is bonded using the adhesive composition for organic fiber cords according to any one of the above.   The rubber reinforcing material according to claim 8, wherein the organic fiber cord is made of polyester or nylon.   A tire using the rubber reinforcing material according to claim 7 or 8.