JPH11279291A - Production of reinforced rubber product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for efficiently producing a reinforced rubber product having firm adhesion between a halogenated butyl rubber excellent in gas impermeability and polyester fibers useful for reinforcing the rubber product and further excellent in flexibility and tack. SOLUTION: The characteristic of this method for producing a reinforced rubber product comprises treating polyester fibers with a first bonding treating liquid containing a polypoxide compound, further treating the treated polyester fibers with a second bonding treating liquid containing a mixture of a resorcinol- formaldehyde precondensate with a chloroprene-based rubber latex and then vulcanizing and bonding the polyester fibers to a halogenated butyl rubber when bonding and reinforcing the halogenated butyl rubber with the polyester fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a reinforced rubber product such as a tire cord, a power transmission belt, a conveyor belt, and a rubber hose. More specifically, it is a reinforced rubber product obtained by bonding and reinforcing halogenated butyl rubber with polyester fiber, which efficiently produces a reinforced rubber product having high rubber / fiber adhesion and excellent flexibility and tackiness. How to do it.

[0002]

2. Description of the Related Art Reinforcing fibers for reinforcing rubber products such as tires, belts and rubber hoses are mainly polyester fibers such as polyethylene terephthalate fibers, polyamide fibers such as nylon 6 fibers and nylon 66 fibers, and aromatic polyamides. High-strength synthetic fibers such as fibers and polyvinyl alcohol fibers are mainly used.

[0003] Among them, polyester fiber satisfying high modulus and low shrinkage is mainly used as a reinforcing material for a cooler hose.

However, the properties required for the reinforcing fibers of the cooler hose include not only high modulus and low shrinkage, but also excellent durability and good adhesion to rubber. However, polyester fibers are inherently inferior in adhesiveness to rubber, so after treatment with an epoxy compound or an isocyanate compound, a mixture of a resorcinol-formaldehyde initial condensate and a rubber latex (R
A method of improving the adhesion of polyester fibers to rubber by treating with FL) or coating the surface with a mixture of a halogenated phenol compound and RFL has been conventionally proposed.

Since the inner tube rubber for the cooler hose is generally required to have a property of hardly permeating gas, it is desired to use gas-impermeable halogenated butyl rubber represented by chlorinated butyl rubber. ing.

However, it is difficult to obtain strong adhesion of polyester fiber to halogenated butyl rubber by the conventional method of improving the adhesion to rubber. For example, it is necessary to use a rubber paste at the time of braiding a hose. There was a problem that it was inferior in nature and environment.

For this reason, the use of reinforced rubber products in which halogenated butyl rubber is reinforced with polyester fibers, especially rubber hoses, has not been developed.

[0008]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying to solve the problems in the prior art described above.

Accordingly, an object of the present invention is to provide a strong adhesive property between halogenated butyl rubber having excellent gas impermeability and a polyester fiber useful for reinforcing rubber products such as rubber hoses, and also having flexibility. And a method for efficiently producing a reinforced rubber product having excellent tackiness.

[0010]

Means for Solving the Problems In order to solve the above problems, a method for producing a reinforced rubber product of the present invention has the following constitution. That is, when the halogenated butyl rubber is bonded and reinforced with a polyester fiber product, the polyester fiber product is treated with a first bonding treatment liquid containing a polyepoxide compound, and further a mixture of a resorcinol-formaldehyde initial condensate and a chloroprene rubber latex. And vulcanizing and bonding the polyester fiber and the halogenated butyl rubber after the treatment with a second bonding treatment liquid containing the same.

In the method for producing a reinforced rubber product according to the present invention, the first adhesive treatment liquid comprises a polyepoxide compound,
Using a blocked isocyanate and / or an ethylene urea compound, a rubber latex and a silicate compound as an adhesive component, wherein the second bonding treatment liquid is a mixture of a resorcinol-formaldehyde initial condensate and a chloroprene rubber latex and a chlorophenol compound Is used as an adhesive component, and the chloroprene-based rubber latex in the second adhesive treatment liquid contains 2-chloro-1,3-butadiene monomer and / or 2,3-dichloro-1,3-butadiene monomer. A polymer or copolymer latex obtained by emulsion polymerization, the first adhesive treatment liquid is applied to a polyester fiber product, and dried at a temperature of 150 to 250 ° C., and then a temperature of 200 to 255 ° C. And then apply a second adhesive treatment liquid and dry at a temperature of 150 to 250 ° C. Heat-treating at a temperature of 0 to 240 ° C., wherein the amount of adhesion of the first adhesive treatment liquid to the polyester fiber is 0.5 to 2% by weight in terms of solid content; 1.0 ~
It is a preferable condition that the content is in the range of 3% by weight, and by applying these conditions, it is possible to expect to obtain a better effect.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The polyester fiber constituting the polyester fiber product used in the present invention is desirably a fiber obtained by melt spinning a polyester containing terephthalic acid as a main bifunctional carboxylic acid and ethylene glycol as a main glycol component. Terephthalic acid in which part or all is replaced by 2,6-naphthalenedicarboxylic acid, 4,4-dicarboxyphenoxyethane and isocyanate group, etc., and ethylene glycol is partially or entirely replaced by diethylene glycol, propylene glycol and butanediol It is also possible to use a fiber made of a polyester or a copolymerized polyester replaced with the above.

Further, if the amount of the polyester is small, trimesic acid, trimellitic acid, boric acid, phosphoric acid,
It may be a copolymer of trifunctional compounds such as glycerin and trimethylolpropane.

Further, the polyester may be modified with various modifiers, for example, terminal carboxyl blocking agents such as carbodiimide compounds, epoxy compounds, isocyanate compounds and oxazoline compounds.

The method of spinning the polyester fiber may be a method in which spinning and drawing are performed in two steps, or a method in which both steps are performed in one step.

The polyester fiber product used in the present invention includes, in addition to the filament yarn made of the polyester, a cord, a woven fabric and a woven fabric made of the filament yarn. The treatment with the adhesive treatment liquid described above may be applied to the polyester fiber product of any form.

On the other hand, examples of the halogenated butyl rubber used in the present invention include chlorinated butyl rubber and brominated butyl rubber. Among them, chlorinated butyl rubber, which is a typical halogenated butyl rubber, is produced by dissolving butyl rubber in carbon tetrachloride or the like and blowing chlorine.

The polyepoxide compound contained in the first adhesive treatment solution used in the present invention is a compound containing two or more epoxy groups in one molecule, and specific examples include glycerol, pentaerythritol, sorbitol, Reaction products of polyhydric alcohols such as ethylene glycol, polyethylene glycol and propylene glycol with halogen-containing epoxides such as epichlorohydrin, resorcinol, bis (4-hydroxyphenyl) dimethylmethane, phenol-formaldehyde resin and resorcinol-formaldehyde Reaction products of polyhydric phenols such as resins with the above-mentioned halogen-containing epoxides, bis- (3,4-epoxy-6-methyl-dicyclohexylmethyl) adipate and 3,4-epoxycyclohexene epoxy Polyepoxide compounds obtained by oxidizing unsaturated bond portions such as amides, bisphenol A type epoxy compounds, bisphenol A type urethane-modified epoxy compounds, and the like. These may be used alone or as a mixture of two or more. be able to.
Among them, a preferred polyepoxide compound is a reaction product of a polyhydric alcohol and epichlorohydrin (a polyglycidyl ether compound of a polyhydric alcohol).

In the first adhesive treatment liquid used in the present invention, the above polyepoxide compound alone may be used as an adhesive component, but the above polyepoxide compound, blocked isocyanate and / or ethylene urea compound, rubber latex and silicate compound Is more preferably used as an adhesive matrix component.

The blocked polyisocyanate compound preferably used in the first adhesive treatment liquid is a compound which releases an active isocyanate compound by releasing a blocking agent by heat, and specifically includes tolylene diisocyanate, metaphenylene and the like. Polyisocyanate compounds such as diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate and triphenylmethane triisocyanate, phenols such as phenol, cresol and resorcinol, ε-caprolactam, lactams such as valerolactam, acetoxime,
Reaction products with a blocking agent selected from oximes such as methyl ethyl ketone oxime and cyclohexane oxime, and ethylene imine.

Among these blocked polyisocyanate compounds, use of an aromatic polyisocyanate compound blocked with ε-caprolactam and an aromatic compound of diphenylmethane diisocyanate give good results.

The ethylene urea compound preferably used in the first bonding treatment liquid is one which improves the adhesiveness of the ethylene imine ring which has been opened and reacted by heating.
Typical examples thereof include reaction products of aromatic and aliphatic isocyanates such as hexamethylene diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, and triphenylmethane diisocyanate with ethyleneimine.

Among these ethylene urea compounds, the use of an aromatic ethylene urea compound of diphenylmethane diethylene urea gives good results.

The first adhesive treatment liquid may contain one or both of the above-mentioned blocked polyisocyanate compound and ethylene urea compound.

The rubber latex preferably contained in the first adhesive treatment liquid includes styrene-butadiene rubber latex (SBR latex), vinylpyridine-styrene-butadiene copolymer latex (VP latex), acrylonitrile-butadiene rubber Latex (NBR latex), chloroprene rubber latex (CR latex), chlorosulfonated polyethylene latex (CSM latex), acrylate rubber latex, natural rubber latex (NR latex), etc., are excellent in improving adhesiveness. In terms of chloroprene rubber latex (CR latex)
Is most preferred.

The silicate compound preferably used in the first adhesive treatment liquid is an inorganic compound containing silicon, magnesium, sodium and lithium as constituent elements and further containing or not containing fluorine and / or aluminum as constituent elements. Which is a synthetic inorganic compound generally called smectite.

The silicate compound preferably has a light transmittance T of 1% aqueous dispersion of 50% or more, particularly preferably 70% or more. The silicate compound preferably has a 1% aqueous dispersion having a thixotropy index of 2 to 10, particularly 3 to 9.

The term "light transmittance T" as used herein means that a 1% aqueous dispersion of a silicate compound is thoroughly stirred, allowed to stand for one day, and only an aqueous dispersion that has not settled and separated is placed in a 10 mm cell. , U-3000 type spectrophotometer (manufactured by Hitachi, Ltd.)
Is a value obtained by measuring the light transmittance at a wavelength of 500 nm by using.

The thixotropy index refers to a 2% aqueous dispersion of a silicate compound, which is stirred well and then allowed to stand for one day.
The viscosity of the aqueous dispersion without sedimentation was measured at a viscosity of 6 rpm and 60 rpm using a B-type viscometer (manufactured by Shibaura System Co., Ltd.) and expressed as (viscosity at 6 rpm) / (viscosity at 60 rpm). is there.

The above silicate compound, especially synthetic smectite, becomes a thixotropic dispersion when dispersed in water, and has a function of obtaining a stable viscosity.

Therefore, the silicate compound acts as a permeation suppressant and a softening agent, and the first adhesive treatment liquid containing the silicate compound is stable and excellent even if the amount of adhesion to the polyester fiber is reduced. Not only can the adhesiveness to the rubber be obtained, but also the treated cord can be made flexible and the reduction in cord strength can be effectively prevented.

That is, since the silicate compound has a large number of hydroxyl groups on the surface, it absorbs water molecules in the adhesive composition and penetrates into the interior of the fiber cord, so that epoxy compounds, isocyanate compounds, rubber latex, etc. Since the penetration of the adhesive matrix component into the interior of the fiber cord is suppressed, when heat treatment is performed on the fiber cord in this state, the adhesive matrix component is solidified at the surface layer portion of the fiber cord, and the inner layer portion of the fiber cord is As a result, mainly the silicate compound remains and the degree of freedom between the single fibers in the inner layer of the cord is increased, so that the flexibility of the fiber cord is improved and the high strength of the fiber cord itself is maintained.

Further, by the addition of the silicate compound, aggregation of the adhesive matrix component such as rubber latex in the adhesive treatment liquid is suppressed, and each adhesive matrix component is uniformly mixed and stabilized, so that the adhesive matrix is formed. Since the particles are uniformly adhered to the fiber surface under excellent cohesion, even with a small amount of adhesion, excellent adhesion to rubber can be obtained.

From the viewpoint of preventing the initial adhesive strength of the treated polyester fiber from decreasing, the compounding ratio of the polyepoxide compound / blocked polyisocyanate compound and / or ethylene urea compound / rubber latex in the first adhesive treatment liquid is 10%. 25 to 25% by weight 20 to 35% by weight 0 to 70% by weight, especially 10 to 20% by weight 20 to
A ratio of 30% by weight to 0 to 70% by weight is preferred.

The first adhesive treatment liquid is preferably used as a solution (including a dispersion) having a total solid content of the adhesive component of 2 to 10% by weight, particularly 4 to 7% by weight.

From the viewpoint of sufficiently suppressing the reduction in the strength of the treated polyester fiber, for example, the cord, and preventing the adhesion of the treated fiber cord to the rubber from decreasing, the compounding amount of the silicate compound is set to the first bonding amount. The amount is preferably 1 to 15% by weight, more preferably 3 to 10% by weight, based on the adhesive component contained in the treatment liquid.

On the other hand, the mixture of the resorcinol-formaldehyde precondensate and the rubber latex, which is a component of the second adhesive treatment liquid used in the present invention, is generally called RFL, and is hereinafter abbreviated as RFL. I do.

In the second treatment liquid of the present invention, it is important to use chloroprene rubber latex as the rubber latex. Instead of this chloroprene rubber latex, polybutadiene latex (PBD latex) and styrene-butadiene type latex are used. Polymerized rubber latex (SBR latex), vinylpyridine-styrene-butadiene copolymer rubber latex (VP latex), chlorosulfonated polyethylene rubber latex (CSM
Latex), butyl rubber latex (IIR latex), acrylate rubber latex, and other rubber latex such as natural rubber latex (NR latex), when the rubber latex component is used, it is superior between halogenated butyl rubber and polyester fiber. Cannot obtain good adhesion.

The chloroprene rubber latex used in the second processing solution of the present invention includes 2-chloro-1,
3-butadiene and / or 2,3-dichloro-1,
A polymer or copolymer latex obtained by emulsion polymerization of a 3-butadiene monomer is preferably used. When this copolymer latex is used, the content of 2,3-dichloro-1,3-butadiene is 20% by weight or more,
In particular, it is preferably at least 40% by weight. 2,3-
This is because the higher the content of dichloro-1,3-butadiene, the better the adhesion between the polyester fiber and the halogenated butyl rubber.

In the second bonding treatment liquid of the present invention, only the above-mentioned RFL can be used as an adhesive component. However, by further using a chlorophenol-based compound as an adhesive component together with the above-mentioned RFL, polyester fibers and halogenated butyl rubber can be used. Can be significantly improved.

Specific examples of the above-mentioned chlorophenol-based compounds include "Casabond E" (registered trademark, manufactured by Thomas Swan Company), "Denabond", "Denabond A", and "Denabond K" (registered trademark, Nagase Chemicals, Inc.) Co., Ltd.)
And 2-6 bis (2,4-dihydroxyphenylmethyl) -4-chlorophenol.

In the above RFL, resorcinol (A)
And the precondensate of formaldehyde (B) are usually reacted in the presence of an alkali catalyst. Preferred (B) / (A)
(Molar ratio) is 1/1 to 3/1. In addition, the adhesiveness to the rubber is sufficiently increased, and the adhesiveness of the cord and the knitted fabric is prevented from increasing. From the viewpoint of preventing the amount from becoming sufficient, the solid component weight ratio of RF (C) and chloroprene rubber latex (D) (C)
/ (D) is preferably in the range of 1/2 to 1/10.

Further, from the viewpoint that the flexibility of the cord and the knitted fabric or the like is sufficient while the adhesiveness is also sufficient, the preferred weight of the RFL (aqueous composition E) and the chlorophenol compound (F) is used. The ratio E / F is 1 / 0.1 to 1 /
2 range.

The second adhesive treatment liquid of the present invention is usually used at a solid concentration of 5 to 20% by weight.

Next, an example of a method for producing a rubber hose reinforced with the polyester fiber cord of the present invention will be described.

First, the first adhesive treatment liquid is immersed in a polyester fiber cord, dried at a temperature of about 70 to 150 ° C., and then subjected to a heat treatment at a temperature of about 200 to 255 ° C.

Here, the above heat treatment temperature range is preferable in order to ensure that the adhesion to the rubber is sufficient while preventing the adhesive treatment agent from deteriorating and the adhesion to the rubber from being insufficient.

Subsequently, a second polyester fiber cord was added.
After applying the adhesive treatment liquid and drying at about 70 to 150 ° C., the temperature is about 150 to 240 ° C., preferably 170 to 240 ° C.
Heat treatment is performed at a temperature of about 220 ° C.

The first adhesive treatment is performed from the viewpoint of preventing the RFL component from adhering to the roller without solidifying, thereby reducing the amount of adhesion to the cord and causing uneven adhesion and insufficient adhesion to rubber. It is preferable that the drying temperature after application of the liquid and the drying temperature after application of the second adhesive treatment liquid be 70 ° C. or higher.

In order to prevent the cord from having sufficient adhesiveness to rubber, while preventing the RFL component from deteriorating due to excessively high temperature and reducing the adhesiveness to rubber, the second adhesive treatment liquid is used. The heat treatment temperature after the application is preferably in the above range.

The amount of the second adhesive treatment liquid applied to the polyester cord is preferably in the range of 0.5 to 2% by weight in terms of solid content.

The amount of the second bonding solution applied to the polyester cord is preferably in the range of 1 to 3% by weight in terms of solid content.

Next, the vulcanization of the halogenated butyl rubber is carried out, and the chlorinated butyl rubber can be vulcanized by sulfur in the same manner as ordinary butyl rubber through a double bond in the molecule. In addition, vulcanization can be carried out with zinc white, amine, phenol or the like through chlorine in the molecule.

Thus, according to the method for producing a reinforced rubber product of the present invention, a reinforced rubber product having high rubber / fiber adhesion, excellent flexibility and tackiness can be efficiently produced. Reinforced rubber products exhibit excellent performance when applied to tire hoses, power transmission belts, conveyor belts and rubber hoses, especially automotive hoses such as radiator hoses, heater hoses, power steering hoses and oil hoses .

[0056]

EXAMPLES Hereinafter, the structure and effects of the present invention will be described more specifically with reference to examples.

The measured values in the following examples were obtained by the following methods. In addition, parts and% in Examples all show parts by weight and% by weight.

[Yarn strength] Tensile tensile tester
(Registered trademark) using JIS L1017 (199
Measured according to 5).

[Adhesion treatment agent adhesion amount] JIS L 101
7 (1995) by the dip pickup-mass method.

[Treatment Cord Adhesion] <Rubber Formulation> (Parts) Cl-IIR (chlorinated butyl rubber) 100 Antioxidant 2246 1.0 MgO 1.0 Carbon black HAF 30.0 Carbon black FEF 30.0 Stearic acid 1 2.0 Staybelite Esrer 10 5.0 Zinc flower 5.0 TMTD 1.0 MBTS 2.0 Using the above compounded rubber and the processing cord, a 25 mm wide test piece was prepared, and a peel test described in JISK 6328 (1995). The treatment cord / rubber peeling force was measured by the method. That is, after unvulcanized rubber (0.4 cm thick) was attached to an aluminum plate of 10 cm in length and 6 cm in width, treatment cords were arranged without gaps. Next, this was put into a vulcanization mold and vulcanized at 150 ° C. for 30 minutes using a vulcanization press. After cooling, the vulcanized product was cut to a width of 25 mm to prepare a test piece, and the treated cord / rubber peeling force was measured according to the peeling test method described in JIS K6328.

[Flexibility of cord] The treated cord was cut straight into 2 cm pieces and placed on a bridge (1 cm interval, φ: 0.6 mm) of a Tensilon tensile tester.
The maximum stress when the hook bar (φ: 0.6 mm) perpendicular to the cord was lowered at the center of the cord (2 cm / min) was obtained, and the value was defined as the cord hardness. Those having a soft cord hardness and within the acceptance criteria were evaluated as “○”, and those having a rigid cord hardness outside the acceptance criteria were evaluated as “x”.

[Adhesiveness of cord] One skein of a 90 m cord was prepared with a measuring machine, and a tactile test was performed with bare hands. It was evaluated.

Example 1 A first adhesive treatment liquid was obtained by dissolving a polyepoxide compound in water and adjusting the solid content to 6%.

On the other hand, in the presence of an alkali catalyst, resorcinol and formalin are mixed at a molar ratio of 2/3, and the mixture is aged for 2 hours. An initial condensate having a solid content of 10% is obtained. 2,3-dichloro-1,3-
Butadiene / 2-chloro-1,3-butadiene ratio (D
By mixing 12.5 parts of CB / MCB) with 100 parts of 1/9) by weight of the solid content and aging for 24 hours,
An RFL having a solid content of 30% was prepared. As a chlorophenol compound (C), "Denabond" (registered trademark,
25% was added to the mixture, and the solid content was adjusted to 20% with water, and further diluted with water to obtain a solid content of 10%.

High-speed melt-spinning of polyethylene terephthalate having a yarn viscosity of 0.95, high-speed melt-spinning, and two 1000-denier multifilaments obtained by drawing are aligned and laid 9 times / 10
The raw cord was obtained by twisting with a twist number of cm.

Next, the first adhesive treatment liquid was applied to the raw cord using a computer treater (manufactured by Ritzler Co.), and drained with an air wiper.
Drying was performed at 20 ° C. for 100 seconds, followed by heat treatment at 240 ° C. for 60 seconds.

Further, the second adhesive treatment liquid was applied,
Drying was performed at 20 ° C. for 100 seconds, followed by heat treatment at 210 ° C. for 60 seconds.

Table 1 shows the results of evaluation of the adhesiveness and flexibility of the cord. As is clear from the results in Table 1 and Table 2 described later, the halogenated butyl rubber hose reinforced with the polyester fiber cord obtained by the method of the present invention (Examples 1 to 7) is a method not satisfying the conditions of the present invention. The adhesion between the rubber and the polyester fiber cord was extremely good as compared with the rubber hose obtained in (1).

[0069]

[Table 1] Example 2 Polyepoxide compound / blocked isocyanate compound / chloroprene rubber latex (DC
B / MCB solids weight ratio is 1/9)
A silicate compound (Si) was added to 100 parts of a mixed solution mixed at a ratio of 1.0% / 23% / 66.0%.
_{O 2 / Al 2 0 3 /} MgO / Na 2 0 / Li 2 O / F =
54.5 / 0.19 / 27.2 / 5.8 / 1.1 / 2.
9, transmittance: 95%, thixotropic index: 8.9,)
The first adhesive treatment liquid was obtained by adding 6 parts of an aqueous solution of the above to make the solid content of the mixed liquid 6%.

Otherwise, the same operation as in Example 1 was performed, and the results of evaluating the adhesiveness and flexibility of the obtained cords are shown in Table 1.

(Examples 3 to 7) The adhesion amounts of the first and second adhesive treatment liquids to the cord, the DCB / MCB ratio of the chloroprene rubber latex and the chlorophenol compound were changed as shown in Table 1. The same operation as in Example 2 was performed except that the evaluation was made, and the results of evaluating the adhesiveness, flexibility, and the like of the obtained cords are also shown in Table 1.

(Comparative Example 1) The same operation as in Example 1 was performed except that the treatment with the second adhesive treatment liquid was omitted, and the obtained cord was evaluated for adhesiveness and flexibility. The results are shown in Table 2.

[0073]

[Table 2] (Comparative Examples 2 and 3) All of Example 2 except that the amounts of the first and second adhesive treatment liquids applied to the cord and the DCB / MCB ratio of the chloroprene rubber latex were changed as shown in Table 1. Table 2 shows the results of evaluating the adhesiveness, flexibility and the like of the obtained cords.

(Comparative Examples 4 to 6) The amount of adhesion of the first adhesive treatment liquid to the cord was changed as shown in Table 2, and as a rubber latex of the second adhesion treatment liquid, vinylpyridine-styrene-butadiene copolymer latex (VP) was used. latex)
And a styrene-butadiene rubber latex (SBR latex) having a solids weight ratio of 50/50 (Comparative Example 5) or a chlorosulfonated polyethylene rubber latex (CSM latex Comparative Examples 6 and 7). The same operation as in Example 2 was carried out except that the amount of the second adhesive treatment liquid attached to the cord was changed as shown in Table 2, and the results of evaluating the adhesion, flexibility, etc. of the obtained treated cord were shown. Also described in 2.

[0075]

According to the method for producing a reinforced rubber product of the present invention, a reinforced rubber product having high adhesion between a halogen-imparted butyl rubber having excellent gas impermeability and polyester fiber, and having excellent flexibility and tackiness can be obtained. It can be manufactured efficiently, and the resulting reinforced rubber products are used in tire cords, power transmission belts, conveyor belts and rubber hoses, especially automotive hoses such as radiator hoses, heater hoses, power steering hoses and oil hoses. Excellent performance when applied.

Claims (6)

[Claims] When the halogenated butyl rubber is bonded and reinforced with a polyester fiber product, the polyester fiber product is treated with a first bonding treatment liquid containing a polyepoxide compound, and a resorcinol-formaldehyde precondensate and a chloroprene rubber latex are further treated. And vulcanizing the polyester fiber product and the halogenated butyl rubber and then vulcanizing the polyester fiber product and the halogenated butyl rubber. 2. The adhesive treatment solution according to claim 1, wherein the first adhesive treatment liquid comprises a polyepoxide compound, a blocked isocyanate and / or an ethylene urea compound, a rubber latex and a silicate compound as an adhesive matrix component.
3. The method for producing a reinforced rubber product according to item 1. 3. The reinforcement according to claim 1, wherein the second adhesive treatment liquid comprises a mixture of a resorcinol-formaldehyde precondensate and a chloroprene rubber latex and a chlorophenol compound as an adhesive component. Manufacturing method of rubber products. 4. A chloroprene-based rubber latex in the second adhesive treatment liquid is obtained by emulsion polymerization of a 2-chloro-1,3-butadiene monomer and / or a 2,3-dichloro-1,3-butadiene monomer. The method for producing a reinforced rubber product according to any one of claims 1 to 3, which is a polymer or a copolymer latex obtained by the above method. 5. Applying the first bonding treatment liquid to a polyester fiber product, drying at a temperature of 150 to 250 ° C., heat treating at a temperature of 200 to 255 ° C., and then applying a second bonding treatment liquid. The method for producing a reinforced rubber product according to any one of claims 1 to 4, wherein the heat treatment is performed at a temperature of 150 to 240 ° C after drying at a temperature of 150 to 250 ° C. 6. An adhesion amount of the first adhesive treatment liquid to the polyester fiber product of 0.5 to 2% by weight in terms of solids, and an adhesion amount of the second adhesion treatment liquid to the polyester fibers of 1.0 to 1.0% in solids equivalent. The method for producing a reinforced rubber product according to any one of claims 1 to 5, wherein the content is in a range of from 3 to 3% by weight.