JPH02175974A - Bonding of aromatic polyamide fiber to rubber formulation - Google Patents

Abstract

PURPOSE:To accomplish the title bonding with high level by treating aromatic polyamide fiber with a RF(resorcin-formalin) resin and a halogen-contg. polymer latex followed by further treatment with an adhesive composition comprising RF resin and adhesive rubber latex. CONSTITUTION:Aromatic polyamide fiber is, in advance, treated with an isocyanate or epoxy compound to activate its surface followed by treatment with a combination of a RF(resorcin-formalin) resin and halogen-contg. (>=45wt.%) polymer latex (e.g. polyvinyl chloride, chlorinated rubber), then heat treatment and further treatment with an adhesive composition comprising (1) a RF resin and (2) an adhesive rubber latex compatible with the adherend rubber polymer in the rubber formulation (e.g. having a solubility parameter falling within the range that of said adherend rubber + or -1.0), thus improving the adhesive force to adhesive rubber including specialty rubber without causing variation in the adhesive force and decrease in the flexural fatigue resistance of said fiber, thereby accomplishing excellent peel adhesive force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adhering aromatic polyamide fibers and rubber compounds.

Traditionally, industrial rubber products such as tires, rubber hoses, power transmission belts, and conveyor belts have been reinforced using fiber materials. Synthetic fibers are generally stronger and have a higher modulus of elasticity than natural fibers such as cotton, wool, and hemp.
It is widely used as such a reinforcing fiber material because it has excellent properties such as excellent resistance to friction and almost no dimensional change due to water or heat. In particular, in recent years, among synthetic fibers, aliphatic polyamide fibers,
Polyamide-based and polyester-based synthetic fiber materials, such as aromatic polyamide fibers and polyester fibers, are often used as reinforcing fiber materials.

Conventionally, in order to bond fibers and rubber compounds, a mixture of resorcinol/formalin resin and rubber latex,
There is a widespread method of using so-called resorcinol formalin resin rubber latex (hereinafter referred to as RFL) as an adhesive.
This method is known, and according to this method, it is possible to obtain a certain degree of adhesive strength between synthetic fibers and rubber compounds.

However, the adhesion performance between the reinforcing fiber material and rubber is an important factor that influences the performance of rubber products as described above. The adhesive strength provided is insufficient.

Therefore, in the past, methods using various RFLs have been proposed in order to increase the adhesive strength between synthetic fibers and rubber compounds. A method has been proposed for adhering chlorohydrin rubber and chloroprene rubber using RFL, which is a mixture of chlorohydrin rubber latex and chloroprene rubber latex with resorcinol/formalin resin.

JP-A-59-89375 proposes a method of bonding rubber to fibers using RFL made of chloroprene-dichlorobutadiene copolymer latex and resorcinol-formalin resin.

On the other hand, regarding rubber, in recent years, not only natural rubber, styrene/butadiene rubber, etc., but also high B'& Japanese or fully saturated rubbers have come to be used in various fields, and such special rubbers are more difficult to adhere to synthetic fibers.

Therefore, regarding the adhesion between such rubber and fibers, Japanese Patent Application Laid-Open No. 61-207442 describes, for example, how to adhere a highly saturated hydrocarbon rubber containing a nitrile group, such as hydrogenated nitrile rubber, to fibers. Chlorhydrin polymer, chloroprene rubber, chlorosulfonated polyethylene,
A method using RFL made of a halogen-containing polymer such as chlorinated polyethylene and a resorcinol/formalin resin has been proposed.

However, compared to conventional aliphatic polyamide fibers and polyester fibers, aromatic polyamide fibers have a more inert surface and are significantly inferior in RFL wettability. When a vulcanized adhesive composite is used in a high-temperature environment and under harsh conditions where it is subjected to dynamic external forces such as bending, compression, and elongation, resulting in large shear between fibers and rubber, as described above, According to conventional bonding methods, the adhesion strength is insufficient, and as a result, peeling failure occurs at the interface between the fiber and rubber, and the product cannot have a long service life. Characteristics are not fully utilized.

An object of the present invention is to provide an adhesion method that can achieve significantly improved adhesion between aromatic polyamide fibers and rubber compared to conventional methods. .

The present invention provides a method for adhering aromatic polyamide fibers and a rubber compound, in which aromatic polyamide fibers are bonded to (a) a resorcinol/formalin resin and a halogen-containing polymer latex having a halogen content of 45% by weight or more. A first step of treating aromatic polyamide fibers with a resorcinol/formalin resin/halogen-containing polymer latex containing, and (b) an adhesive rubber latex that is compatible with the resorcinol/formalin resin and the rubber polymer in the rubber compound. It is characterized by including a second step of treating with the adhesive composition containing the adhesive composition.

In the method of the present invention, the resorcinol/formalin resin used in the first step is conventionally known for adhesion between rubber and fibers, and usually, resorcin and formalin are mixed at a molar ratio of resorcin/formalin. 1/
It is an initial condensate obtained by condensation in the presence of a basic catalyst at a concentration of 3 to 3/l, and is usually used as an aqueous solution of 5 to 80% by weight.

Furthermore, the halogen content used in the method of the present invention is 4
Examples of the halogen-containing polymer latex containing 5 tffi% or more include vinyl chloride, chlorinated rubber, chlorinated polyethylene, dichlorobutadiene homopolymer, vinyl acetate, vinyl chloride, vinylidene chloride, maleic anhydride, acrylic ester, Methacrylic acid ester, acrylonitrile, vinyl ether compound, ethylene, propylene,
Examples include copolymers with chlorobrene and the like.

In particular, in the present invention, vinyl chloride, chlorinated rubber, or a mixture thereof is preferably used.

In the method of the present invention, as a first step, the aromatic polyamide fiber is made of a mixture containing a resorcinol/formalin resin and a halogen-containing polymer latex having a halogen content of 145% by weight or more as described above. Aromatic polyamide fibers are treated with halogen polymer latex.

In such a resorcinol/formalin resin/halogen-containing polymer latex, the halogen-containing polymer has high polarity,
It has a high affinity for aromatic polyamide fibers, and not only has excellent wettability, but also forms an adhesive layer with high cohesive force between the aromatic polyamide fibers. Therefore, a halogen-containing polymer having a halogen content of less than 45% by weight is poor in the above-mentioned effects and is not suitable for use in the present invention. In particular, resorcinol/formalin resin/halogen-containing polymer latex containing a halogen-containing polymer with a halogen content of less than 40% by weight can achieve strong adhesion between aromatic polyamide fibers and rubber. Can not do it.

The above-mentioned resorcinol/formalin resin/halogen-containing polymer latex preferably contains a halogen-containing polymer in the range of 50 to 1000 parts by weight, particularly 200 to 800 parts by weight, per 100 parts by weight of the resorcinol/formalin resin.
The content is preferably within the range of parts by weight. Further, the solid content concentration in the resorcinol/formalin resin/halogen-containing polymer latex is preferably in the range of 10 to 50% by weight.

In the first step, the aromatic polyamide fibers are treated with the resorcinol/formalin resin/halogen-containing polymer latex by immersing the fibers in the latex and then subjecting them to heat treatment, if necessary. This heat treatment may be carried out at a temperature sufficient to react and fix the latex attached to the fibers, and is usually 100 to 270°C.
You can process it for several minutes.

On the other hand, even if aromatic polyamide fibers are treated with a latex containing only the halogen-containing polymer, effective adhesion cannot be obtained between the aromatic polyamide fibers and the rubber. In addition, as the halogen content in the halogen-containing polymer increases, the adhesive layer tends to become harder, and furthermore, as the amount of resorcinol/formalin resin/halogen-containing polymer latex attached to the aromatic polyamide fiber increases, There is a tendency to reduce the bending fatigue resistance of aromatic polyamide fibers.

Therefore, in the present invention, the halogen content in the halogen-containing polymer used is preferably 50% by weight or less. In addition, it is desirable to reduce the amount of resorcinol, formalin resin, and halogen-containing polymer latex attached to aromatic polyamide fibers as much as possible. This may cause variations.

Therefore, according to the method of the present invention, as the second step, a resorcinol/formalin resin/adhesive rubber latex containing a resorcinol/formalin resin and an adhesive rubber having compatibility with the adherent rubber polymer in the rubber compound is used. By this treatment, even if the amount of resorcinol/formalin resin/halogen-containing polymer latex adhering to the aromatic polyamide fiber is small, there is no bond between the aromatic polyamide fiber and the adhered rubber. Moreover, strong adhesion can be achieved without variations in adhesive strength or deterioration of the bending fatigue resistance of aromatic polyamide fibers.

As the resorcinol/formalin resin in the adhesive composition used in this second step, the same one as described above can be used.

As the adhered rubber that is compatible with the adhered rubber, - For boat fishing, unvulcanized rubber that is the same as the adhered rubber or unvulcanized rubber that is similar from the viewpoint of chemical structure, but different Even if unvulcanized rubber has a chemical structure, if the polarity of the adhesive rubber latex, that is, the solubility parameter (hereinafter referred to as SP value) is similar to that of the adhered rubber, it will not be compatible with the adhered rubber. Since it is soluble, it can be used as an adhesive rubber latex in an adhesive composition by adding an appropriate vulcanizing agent to the adhesive rubber compound in advance depending on the adhesive rubber used.

Although various methods are known for determining the SP value, the SP value is usually determined by the method of Sma Il. This method is described, for example, in J. Paxnt Technol, +76 (1970); New Values of
the 5olubility Parame-te
rs from Vapor Pressure Da
It is described in ta.

In the method of the present invention, the rubber in the adhesive composition preferably has an SP value in the range of +1.0 to -1.0 with respect to the SP value determined by the method of Small above of the adhered rubber. . When outside this range, the polarity difference between the adhered rubber and the adhered rubber is too large, resulting in poor compatibility with the adhered rubber, making it difficult to achieve strong adhesion between the aromatic polyamide fiber and the rubber. I can't.

The adhesive composition preferably contains adhesive rubber in a range of 10 to 90 parts by weight, particularly in a range of 20 to 80 parts by weight, per 100 parts by weight of resorcinol/formalin resin. In the adhesive composition, when the blending amount of the adhesive rubber to the resorcinol/formalin resin is out of the above range, strong adhesion cannot be obtained between the aromatic polyamide fiber and the rubber compound. Further, in the adhesive composition, the solid content concentration is preferably 10 to 50% by weight.

The treatment of the aromatic polyamide fibers with the adhesive composition in the second step is also carried out by immersing the fibers in the composition and then subjecting them to heat treatment, if necessary. This heat treatment may be carried out at a temperature sufficient to cause reaction and fixation of the above-mentioned composition attached to the fibers, and is usually carried out at 100 to 270''C for several minutes.

Furthermore, according to the method of the present invention, prior to the first step, the aromatic polyamide fibers can be treated with a solution of an isocyanate, an epoxy compound, or a mixture thereof.

In this treatment, the aromatic polyamide fibers are immersed in the above solution, and if necessary, heat-treated to fix the compound to the fibers.The isocyanate compound is not particularly limited, but For example, polyisocyanates such as tolylene diisocyanate, metaphenylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, and polymethylene polyphenyl diisocyanate are preferably used. Also,
Such polyisocyanates include trimethylolpropane,
2 active hydrogens in the molecule, such as pentaerythritol
A polyisocyanate obtained by reacting the above compounds, or a polyisocyanate obtained by reacting the polyisocyanate with a blocking agent such as phenols, tertiary alcohols, or secondary amines. Blocked polyisocyanate, in which isocyanate groups are blocked, is also suitably used as the polyisocyanate compound.

As the epoxy compound, a polyepoxy compound having two or more epoxy groups in the molecule is preferable, and therefore, for example, ethylene glycol, glycerin, sorbitol,
Reaction products of polyhydric alcohols such as pentaerythritol, polyalkylene glycols such as polyethylene glycol, and halogen-containing epoxy compounds such as epichlorohydrin, resorcinol, bis(4-hydroxyphenyl)dimethylethane, phenol/formamide resin, resorcinol. - A reaction product of a polyhydric phenol such as formamide resin or a phenol resin and a halogen-containing epoxy compound such as epichlorohydrin is preferably used.

Organic solvents for forming solutions of isocyanate compounds or epoxy compounds as described above are not particularly limited, but are usually benzene, xylene,
Aromatic hydrocarbons such as toluene, aliphatic ketones such as methyl ethyl ketone and methyl isobutyl ketone, ethyl acetate,
Esters such as amyl acetate are preferably used. The solid content concentration in such a solution is not particularly limited, but is usually preferably in the range of 10 to 50% by weight.

The treatment with a solution of an isocyanate compound or an epoxy compound activates the surface of the aromatic polyamide fiber, increases the wettability of the fiber with the resorcinol/formalin resin/halogen-containing polymer latex in the first step, and furthermore, It reacts with the methylol groups of the resorcinol/formalin resin in the first step, or is converted into a resin during vulcanization of the rubber to aromatic polyamide fibers, forming a strong adhesive layer.

The aromatic polyamide fibers treated as described above are then brought into close contact with a rubber compound and vulcanized and bonded under the usual processing conditions known for the rubber compound.

The method of the present invention can be applied to adhered rubbers such as, but not limited to, natural rubber, styrene-butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, chlorinated polyethylene, chlorosulfonated polyethylene, It can be applied to epichlorohydrin rubber, fluororubber, etc. Particularly suitable are natural rubber, styrene-butadiene rubber, chloroprene rubber, and acrylonitrile-butadiene rubber.

Such rubbers may contain appropriate amounts of various reinforcing fillers, anti-aging agents, plasticizers, vulcanization aids, processing aids, etc., which are known as conventional rubber compounds. .

As described above, according to the method of the present invention, in the first step, aromatic polyamide fibers are treated with resorcinol, formalin resin, and halogen-containing polymer latex, and then, in the second step, By treating with an adhesive composition containing a resorcinol/formalin resin and an adhesive rubber that is compatible with the rubber polymer in the rubber compound, aromatic polyamide fibers can be strongly vulcanized and bonded to various rubber compounds. can do.

Therefore, the method of the present invention is suitable for adhering fibers as reinforcing bodies for various rubbers in dynamic products such as power transmission belts, conveyor belts, tires, and the like.

Implementation (2) The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples in any way.

The rubber and latex used in the examples and their preparation will be explained below.

Polyvinyl chloride latex (PVC latex) Zeon 150X50, manufactured by Nippon Zeon ■, solid content 48% by weight, chlorine content of polyvinyl chloride 57% by weight, S
P value 9.7° Chlorinated rubber latex 30 parts of chlorinated rubber CR-150 manufactured by Asahi Denka Corporation, which has a chlorine content of 65% by weight and an SP value of 9.5, was added to 60 parts of toluene to prepare a mixture, and this was mixed with 100 parts of water. and 1.4 parts of an emulsifier (Aerosol 0TR) were added to water, and mixed for 5 minutes using a homo mixer to obtain a latex. Solid content 2
0% by weight.

Chloroprene rubber latex Manufactured by Denki Kagaku Kogyo ■ Roloprene rubber latex LV-6
0, solid content 50% by weight, chlorine content of chloroprene rubber 4
1% by weight, SP value 9.2゜Chlorosulfonated polyethylene latex manufactured by Iron Seikagaku Kogyo ■, solid content 40% by weight, chlorine content of chlorosulfonated polyethylene 25% by weight, SPPO 21゜Natural rubber latex solid content 60% by weight, SP value of natural rubber 8.3° Styrene-butadiene rubber latex (SBR latex) N1pol LX 110 manufactured by Nippon Zeon ■, solid content by weight%.

Acrylonitrile/butadiene rubber and tolyl rubber) Nitrile rubber N1pol 1043, S manufactured by Nippon Zeon ■
PPO27゜chloroprene rubber Neobrene WRT manufactured by Showa Denko ■, SP value 9.2゜Isocyanate compound As the isocyanate compound, Millionate MR (polymethylene polyphenyl polyisocyanate) manufactured by Nippon Polyurethane Industries ■ or PAP manufactured by Kasei Upjohn "■"
I was used.

Epoxy compound Denacol EX313 (glycerol polyglycidyl ether) manufactured by Nagase Kasei Kogyo Chlorinated natural rubber CR-150 manufactured by Asahi Denka ■, chlorine content 65% by weight, SPP
O25° Also, the peeling state of the obtained adhesive is shown below.

F Fiber fracture F-A 11i Fiber-adhesive interface fracture A Adhesive fracture A-R Adhesive-rubber interface fracture R Rubber cohesive fracture Example 1 Aromatic polyamide fiber cord (Banjin ■ Technora, 1
500D/1x3) was immersed in treatment liquid (a) having the composition shown in Table 1, and then heat-treated at 200°C for 2 minutes.

Next, when Example Formulation A and Comparative Example Formulation C were used, after being immersed in the treatment liquid (b), it was heated at 200°C for 2 hours.
Heat treated for minutes.

After adhering each of the fiber cords treated as described above to a sheet made of unvulcanized rubber compound 1 below,
A bond was obtained by vulcanization at 0°C for 30 minutes.

Sue Meng Emu Bokin Tachiage Natural Rubber 100 parts Zinc white 5 parts Stearic acid
Part 2 Sulfur
2.5 parts FEF carbon black
45 parts process oil
5 parts N-oxydiethylene-2-bendithiazylsulfenamide 1 part 2.2.
4-) Dimethyl-1,2-dihydroquinoline
0.2 parts The thus obtained adhesive was tested at a peeling speed of 100ffl [117
The 180° peel adhesion between the fiber cord and the rubber was measured in minutes. The results are shown in Table 1.

Example 2 The same aromatic polyamide fiber cord as in Example 1 was immersed in each of the treatment liquids (a) having the compositions shown in Table 2.
Heat treated at 00'C for 2 minutes, then immersed in the treatment solution (b) listed in Formulation A in Table 1 above, and heated to 200'C.
The sample was heat-treated for 2 minutes.

After each of the fiber cords treated as described above was brought into close contact with the sheet of the unvulcanized rubber compound 1,
The adhesive was vulcanized for 30 minutes to obtain an adhesive.

This adhesive was tested at a peeling speed of 100 m using a peel tester.
The 180° peel adhesion between the fiber cord and the rubber was measured at 1/min. The results are shown in Table 2.

Furthermore, based on the results of the treatments using the above formulations A and E as examples according to the present invention and the treatments using the above formulations C, F, and G as comparative examples, it was determined that the halogen-containing polymer in the treatment liquid (a) The relationship between the halogen content and the adhesive strength of the resulting adhesive is shown in Figure 1.After treating aromatic polyamide fibers with RFL containing polyvinyl chloride latex or chlorinated rubber latex, natural rubber was used as the adhesive rubber. It is shown that extremely high adhesion forces can be achieved by treating with an adhesive composition containing the compound and vulcanizing it onto a natural rubber compound.

Example 3 The same aromatic polyamide fiber cord as in Example 1 was immersed in each of the treatment solutions (a) having the compositions shown in Table 3, and then heat treated at 200°C for 2 minutes, and then the cords shown in Table 3 were After being immersed in the treatment liquid (b) having the composition, it was heat-treated at 200°C for 2 minutes.

Each of the fiber cords treated as described above was mixed with the unvulcanized rubber compound 1, unvulcanized rubber compound 2 and 3 shown below.
After adhering to each sheet consisting of
The adhesive was vulcanized for 30 minutes to obtain an adhesive.

Sulfur rubber 2 Neoprene WRT 100 parts Magnesium oxide 4 parts Zinc oxide
5 parts SRF carbon black 40 parts 2-mercaptoimidacillin
0.5 parts N, N″-Gβ-naphthyl-P-
Phenyl diamine 0.5 part 2.2
．． 4-) Samethyl-1,2-dihydroquinoline
0.5 part process oil
10 parts stearic acid
0.5 parts Frame rubber 3 Nitrile rubber 100 parts Zinc white 1
No. 5 Part stearic acid
1 part sulfur
0.5 part SRF carbon black
40 parts tetramethylthiuram disulfide
2 parts Mercaptobenzothiazole 0.5 parts This adhesive was measured for 180° peel adhesion between the fiber cord and the rubber using a peel tester at a peel speed of 100 m+n/min.

The results are shown in Table 3.

In addition, the SP value of the adhered rubber in the rubber compound, and the difference between the aromatic polyamide fiber and the adhered rubber in the obtained adhesive when using the adhesive composition shown in Table 1 containing natural rubber or nitrile rubber as the adhesive rubber. FIG. 2 shows the relationship between the adhesive strength and the adhesive force between the two.

If an aromatic polyamide structure is treated with the above-mentioned Example Formulation A using an adhesive composition containing natural rubber (SP value 8.3), when the adhered rubber is natural rubber, the fibers and natural rubber will be bonded. A strong bond is obtained between the two.

Similarly, the adhered rubber is chloroprene rubber (SP value 9°2)
Even when the SP value of chloroprene rubber is close to that of natural rubber, and the difference therebetween is 0.9, strong adhesion can be obtained between the fibers and the chloroprene rubber.

However, if the adhered rubber is nitrile rubber (SP value 9.7), the difference between the SP value of the natural rubber contained in the adhesive rubber is as large as 4 months, and the difference between the fiber and the nitrile rubber is large. strong adhesion cannot be obtained.

On the other hand, if aromatic polyamide fibers are treated with the above recipe J using an adhesive composition containing nitrile rubber (SP value 9.7), if the adhered rubber is natural rubber, the SP value will be the same as that of nitrile rubber. Because of the large difference in , it is not possible to obtain strong adhesion between the fiber and natural rubber. However, when the adhered rubber is chloroprene rubber or nitrile rubber, the SP value of these adhered rubbers is the same as or close to that of the nitrile rubber that is the adhesive rubber, so there is a gap between the fibers and these adhered rubbers. Strong adhesion can be obtained.

Styrene-butadiene rubber (SP value 8.
Formulation H using 8) and chloroprene rubber (SP value 9.
Formula 2 using 2) shows that these adhesive rubbers have SP on all natural rubber, chloroprene rubber, and nitrile rubber.
Since the values are the same or close, it is possible to achieve strong adhesion between all rubber and aromatic polyamide fibers.

Example 4 After immersing the same aromatic polyamide fiber cord as in Example 1 in the treatment solution (a) having the composition shown in Table 4,
'C for 2 minutes, and then immersed in a treatment solution (b) having the composition shown in Table 4, followed by heat treatment at 200°C for 2 minutes.

Each of the fiber cords treated as shown in Table 1 was brought into close contact with each of the nitrile rubber sheets made of the unvulcanized rubber compound 3, and then vulcanized at 150°C for 30 minutes to obtain an adhesive. .

Regarding this adhesive, the 180° peel adhesive strength between the fiber cord and the rubber was measured using a peel tester at a peel rate of 100 cylinders/min. The results are shown in Table 4.

In addition, the adhesive was wrapped around rotating bending bars located above and below, one end was fixed to the frame, a load of 1.5 kg was applied to the other end, and the rotating bending bars were reciprocated up and down 10,000 times. , a bending test was conducted.

Table 4 shows the strength retention rate. The strength retention rate is the value obtained by dividing the strength before the bending test by the strength after the test.

Example 5 After immersing the same aromatic polyamide fiber cord as in Example 1 in the pretreatment liquid (C) having the composition shown in Table 5,
It was heat-treated at 200°C for 2 minutes, and then, in the same manner as in Formulation A in Example 1, it was sequentially immersed in treatment solutions (a) and 3), and heat-treated at 200°C for 2 minutes.

Each of the fiber cords treated as described above was adhered to each of the sheets made of the unvulcanized rubber compound 1, and then vulcanized at 150'C for 30 minutes to obtain an adhesive.

``For this adhesive, the 180'' peel adhesive strength between the fiber cord and the rubber was measured using a peel tester at a peel rate of 100 cylinders/min.The results are shown in Table 5.

Table 5

[Brief explanation of the drawing]

Figure 1 is a graph showing the relationship between the chlorine content of the chlorine-containing polymer in resorcinol/formalin resin/chlorine-containing polymer latex and the adhesive strength between aromatic polyamide fiber and natural rubber. 2 is a graph showing changes in adhesive strength between aromatic polyamide fibers and adhered rubber when adhered rubbers and adhesive rubbers having various SP values are used. Patent Applicant Band-Kagaku Co., Ltd. Agent Patent Attorney Ittsu Makino Department Figure 1 0O Toyu Horikoku 0 Haruka Content (Roll Z)

Claims (3)

[Claims] (1) In the method of bonding aromatic polyamide fibers and rubber compounds, aromatic polyamide fibers are bonded to (a) resorcinol/formalin resin and halogen content 45
A first step of treating with a resorcinol-formalin resin/halogen-containing polymer latex containing at least % by weight of a halogen-containing polymer latex, and (b) a resorcinol/formalin resin and the adhered rubber polymer in the rubber compound. A method for adhering aromatic polyamide fibers and a rubber compound, the method comprising a second step of treating with an adhesive composition containing a compatible adhesive rubber latex. (2) The aromatic polyamide fiber and rubber compound according to claim 1, wherein the adhesive rubber latex has a solubility parameter in the range of +1.0 to -1.0 of the solubility parameter of the adhered rubber. Adhesion method. (3) The method for adhering aromatic polyamide fibers and a rubber compound according to claim 1, characterized in that prior to the first step, the aromatic polyamide fibers are treated with an isocyanate compound or an epoxy compound.