A fluororubber-chlorinated butyl rubber blended rubber tape and preparation method thereof

Abstract

The present invention relates to the technical field of protective material utilization, and provides a fluororubber-chlorobutyl rubber blended rubber tape and a preparation method thereof. The fluororubber-chlorobutyl rubber blended rubber tape provided by the present invention comprises a first fluororubber-chlorobutyl rubber blended rubber surface rubber layer, a first fluororubber adhesive layer, a nylon skeleton layer, a second fluororubber adhesive layer and a second fluororubber-chlorobutyl rubber blended rubber surface rubber layer which are sequentially stacked; the first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer comprise a homogenizer, a flame retardant and an acid absorbent. The tape has good resistance to chemical penetration, and has both air tightness and flame retardancy, and has broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of protective materials, and in particular to a fluororubber-chlorinated butyl rubber blended rubber tape and a preparation method thereof. Background Art

[0002] Multi-layer composite tape is a material that can effectively protect against high-risk chemicals, radioactive pollution, etc., and can protect personnel from harm from toxic and harmful chemical industrial products, organic solvents, and highly corrosive substances.

[0003] Fluororubber composite material is a kind of adhesive tape composite material with high air tightness, high barrier property, corrosion resistance, permeability and flame retardancy. Its excellent comprehensive performance makes it one of the main research materials for chemical-resistant adhesive tape. Chlorobutyl rubber has good permeability resistance and is extremely resistant to polar solvents such as esters, ethers, ketones, and chemicals such as medium-concentration acids and alkalis as well as animal oils, but it is not resistant to petroleum solvents and mineral oils, and will swell when in contact with them. At present, fluororubber and chlorobutyl rubber are both used in chemical-resistant adhesive tapes, but due to the large difference in the cohesive energy density of fluororubber and chlorobutyl rubber, it is difficult to achieve blending. Therefore, when preparing chemical-resistant adhesive tapes, fluororubber and chlorobutyl rubber are generally used separately. For example, Chinese patent CN109501415A discloses a tape material, in which a fluororubber layer and a chlorobutyl rubber layer are coated on the surface of the base fabric respectively, and then compounded with polyester-cotton cloth.

[0004] At present, there is no related report in the art on the use of fluororubber-chlorinated butyl rubber blended rubber to prepare chemical resistant adhesive tape. Summary of the invention

[0005] In view of this, the present invention provides a fluororubber-chlorobutyl rubber blended rubber tape and a preparation method thereof. The present invention uses fluororubber-chlorobutyl rubber blended rubber as the surface rubber layer of the tape, and the obtained tape has good chemical penetration resistance and is both airtight and flame retardant.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A fluororubber-chlorobutyl rubber blended rubber tape comprises a first fluororubber-chlorobutyl rubber blended rubber surface rubber layer, a first fluororubber adhesive layer, a nylon skeleton layer, a second fluororubber adhesive layer and a second fluororubber-chlorobutyl rubber blended rubber surface rubber layer which are stacked in sequence; the first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer comprise a leveler, a flame retardant and an acid absorbent.

[0008] Preferably, the thickness of the first fluororubber adhesive layer and the second fluororubber adhesive layer are independently 0.01-0.02 mm.

[0009] Preferably, the thickness of the first fluororubber-chlorinated butyl rubber blended rubber surface rubber layer and the second fluororubber-chlorinated butyl rubber blended rubber surface rubber layer are independently 0.06-0.1 mm.

[0010] Preferably, the thickness of the fluororubber-chlorinated butyl rubber blended rubber tape is 0.36-0.44 mm.

[0011] Preferably, the first fluororubber adhesive layer and the second fluororubber adhesive layer independently include the following components in parts by weight: 100 parts of type 26 fluororubber, 3 parts of stearic acid, 5 parts of magnesium oxide, 6 parts of calcium hydroxide, 8 parts of white carbon black, 1.5 parts of adhesive RS, 5 parts of adhesive RA-65, 1.5 parts of peroxide vulcanizer, and 3.0 parts of accelerator.

[0012] Preferably, the first fluororubber-chlorinated butyl rubber blended rubber surface rubber layer and the second fluororubber-chlorinated butyl rubber blended rubber surface rubber layer independently include the following components in parts by weight: 50 parts of 26 type fluororubber, 50 parts of chlorinated butyl rubber 1066, 2 parts of stearic acid, 10 parts of flame retardant, 6 parts of acid absorber, 10 parts of antimony trioxide, 25 parts of decabromodiphenyl ether, 25 parts of zinc borate, 15 parts of leveler 60NS, 1.5 parts of peroxide vulcanizer, and 3.0 parts of accelerator.

[0013] Preferably, the flame retardant is magnesium oxide, and the acid absorbent is calcium hydroxide.

[0014] Preferably, the gram weight of the nylon skeleton layer is 100±10g / m 2 .

[0015] The present invention also provides a method for preparing the fluororubber-chlorinated butyl rubber blended rubber tape described in the above scheme, comprising the following steps:

[0016] Fluororubber adhesive is coated on the upper and lower surfaces of the nylon skeleton layer to form a first fluororubber adhesive layer and a second fluororubber adhesive layer, and fluororubber-chlorinated butyl rubber blended rubber surface adhesive layers are coated on the surfaces of the first fluororubber adhesive layer and the second fluororubber adhesive layer to form a first fluororubber-chlorinated butyl rubber blended rubber surface adhesive layer and a second fluororubber-chlorinated butyl rubber blended rubber surface adhesive layer, and the obtained layered structure is vulcanized to obtain a fluororubber-chlorinated butyl rubber blended rubber tape.

[0017] Preferably, the vulcanization includes a first stage and a second stage which are performed sequentially, wherein the temperature of the first stage is 100-140°C and the time is 60±10 min, and the temperature of the second stage is 140-145°C and the time is 60±10 min.

[0018] The invention provides a fluororubber-chlorobutyl rubber blended rubber tape, comprising a first fluororubber-chlorobutyl rubber blended rubber surface rubber layer, a first fluororubber adhesive layer, a nylon skeleton layer, a second fluororubber adhesive layer and a second fluororubber-chlorobutyl rubber blended rubber surface rubber layer which are stacked in sequence; the first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer comprise a homogenizer, a flame retardant and an acid absorbent. The cohesive energy density of fluororubber and chlorobutyl rubber is quite different, and it is difficult to disperse them evenly when blended. The present invention improves the mixing uniformity of rubbers of different polarities and viscosities by adding a homogenizer. The homogenizer can be quickly absorbed by the rubber during the mixing cycle, and relatively low-viscosity rubber is immediately produced, so other additives can also be quickly mixed; at the same time, the present invention also adds an acid absorber to the fluororubber-chlorobutyl rubber blended rubber, which can effectively neutralize the medium of a class of substances such as hydrogen fluoride precipitated during the vulcanization process of fluororubber, and can also promote the improvement of crosslinking density, ensuring that the vulcanized rubber has good stability; the present invention also adds a flame retardant to the fluororubber-chlorobutyl rubber blended rubber to make it have flame retardant properties. The present invention uses fluororubber-chlorobutyl rubber blended rubber as the surface rubber layer, and can take advantage of the excellent chemical penetration resistance of fluororubber and chlorobutyl rubber, and make up for their shortcomings to achieve long-term and effective protection against a variety of hazardous chemicals, and has good flame retardancy and air tightness.

[0019] In addition, the skeleton layer used in the present invention is nylon, which is a new high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, aging resistance, and long life cycle.

[0020] Furthermore, the fluororubber adhesive layer used in the present invention is a composite of fluororubber and a meta-methyl methacrylate adhesive system, and has good flame retardancy and high bonding strength with nylon skeleton materials.

[0021] In summary, the fluororubber-chlorobutyl rubber blended rubber tape provided by the present invention has good resistance to chemical penetration, and has both air tightness and flame retardancy, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention provides a schematic structural diagram of a fluororubber-chlorinated butyl rubber blend rubber tape, wherein: 1-fluororubber-chlorinated butyl rubber blend rubber surface layer, 2-fluororubber adhesive layer, 3-nylon skeleton layer. DETAILED DESCRIPTION

[0023] The invention provides a fluororubber-chlorobutyl rubber blended rubber tape, comprising a first fluororubber-chlorobutyl rubber blended rubber surface rubber layer, a first fluororubber adhesive layer, a nylon skeleton layer, a second fluororubber adhesive layer and a second fluororubber-chlorobutyl rubber blended rubber surface rubber layer which are stacked in sequence; the first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer comprise a homogenizer, a flame retardant and an acid absorbent.

[0024] Figure 1 The schematic diagram of the structure of the fluororubber-chlorobutyl rubber blend rubber tape provided by the present invention, wherein 1 is the fluororubber-chlorobutyl rubber blend rubber surface layer, 2 is the fluororubber adhesive layer, and 3 is the nylon skeleton layer. Figure 1 Provide detailed explanation.

[0025] In the present invention, the gram weight of the nylon skeleton layer is preferably 100±10g / m 2 , more preferably 105g / m 2 The present invention has no special requirements for the nylon skeleton layer, and nylon fabrics well known to those skilled in the art can be used; the nylon skeleton material is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, anti-aging, and long life cycle.

[0026] In the present invention, the thickness of the first fluororubber adhesive layer and the second fluororubber adhesive layer is independently preferably 0.01~0.02mm, more preferably 0.015~0.018mm; the thickness of the first fluororubber-chlorinated butyl rubber blended rubber surface layer and the second fluororubber-chlorinated butyl rubber blended rubber surface layer is independently preferably 0.06~0.1mm, more preferably 0.08~0.09mm; the thickness of the fluororubber-chlorinated butyl rubber blended rubber tape is preferably 0.36~0.44mm, more preferably 0.4mm.

[0027] In the present invention, the gram weight of the fluororubber-chlorobutyl rubber blended rubber tape is preferably 360-400 g / m 2 .

[0028] In the present invention, the first fluororubber adhesive layer and the second fluororubber adhesive layer independently preferably include the following components in parts by weight: 100 parts of 26 type fluororubber, 3 parts of stearic acid, 5 parts of magnesium oxide, 6 parts of calcium hydroxide, 8 parts of white carbon black, 1.5 parts of adhesive RS, 5 parts of adhesive RA-65, 1.5 parts of peroxide vulcanizer, and 3.0 parts of accelerator; the peroxide vulcanizer is preferably DCP, and the accelerator is preferably TAIC.

[0029] In the present invention, the first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer independently preferably include the following components in parts by weight: 50 parts of 26 type fluororubber, 50 parts of chlorobutyl rubber 1066, 2 parts of stearic acid, 10 parts of flame retardant, 6 parts of acid absorber, 10 parts of antimony trioxide, 25 parts of decabromodiphenyl ether, 25 parts of zinc borate, 15 parts of leveler 60NS, 1.5 parts of peroxide vulcanizer, and 3.0 parts of accelerator; the flame retardant is preferably magnesium oxide, and the acid absorber is preferably calcium hydroxide; the peroxide vulcanizer is preferably DCP, and the accelerator is preferably TAIC. Type 26 fluororubber is resistant to petroleum-based oils, diester oils, silicone ether oils, silica oils, inorganic acids, most organic and inorganic solvents, and medicines, but is not resistant to low-molecular ketones, ethers, esters, ammonia, amines, hydrofluoric acid, chlorosulfonic acid, and phosphoric acid hydraulic oils; chlorinated butyl rubber has excellent permeability resistance, and is extremely resistant to polar solvents such as esters, ethers, ketones, and moderately concentrated acids and alkalis, as well as chemicals such as animal oils, but is not resistant to petroleum solvents and mineral oils, and will swell upon contact with them; the present invention adopts a blend of type 26 fluororubber and chlorinated butyl rubber as the surface rubber layer, and can utilize the excellent chemical permeability resistance of fluororubber and chlorinated butyl rubber to complement each other and achieve long-term and effective protection against a variety of hazardous chemicals.

[0030] The present invention also provides a method for preparing the fluororubber-chlorinated butyl rubber blended rubber tape described in the above scheme, comprising the following steps:

[0031] Fluororubber adhesive is coated on the upper and lower surfaces of the nylon skeleton layer to form a first fluororubber adhesive layer and a second fluororubber adhesive layer, and fluororubber-chlorinated butyl rubber blended rubber surface adhesive layers are coated on the surfaces of the first fluororubber adhesive layer and the second fluororubber adhesive layer to form a first fluororubber-chlorinated butyl rubber blended rubber surface adhesive layer and a second fluororubber-chlorinated butyl rubber blended rubber surface adhesive layer, and the obtained layered structure is vulcanized to obtain a fluororubber-chlorinated butyl rubber blended rubber tape.

[0032] The present invention has no special requirements for the coating method of the fluororubber adhesive layer and the fluororubber-chlorobutyl rubber blended rubber surface rubber layer, and methods familiar to those skilled in the art can be used. Specifically, the preparation method of the fluororubber adhesive layer is preferably: after mixing the fluororubber components, the mixed rubber and ethyl acetate are stirred at a mass ratio of 1:3 to form a slurry, and then coated; the preparation method of the fluororubber-chlorobutyl rubber blended rubber surface rubber layer is preferably: after mixing the fluororubber-chlorobutyl rubber components, the mixed rubber and 120# gasoline are stirred at a mass ratio of 1:1 to form a slurry, and then coated; the present invention has no special requirements for the mixing method of the fluororubber and fluororubber-chlorobutyl rubber, and it can be carried out according to the conventional open mill mixing process.

[0033] In the present invention, the vulcanization preferably includes a first stage and a second stage performed sequentially, the temperature of the first stage is preferably 100-140°C, more preferably 130-140°C, the time of the first stage is preferably 60±10min, the temperature of the second stage is preferably 140-145°C, and the time is preferably 60±10min.

[0034] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] Coat 0.02mm thick fluororubber adhesive on the upper and lower nylon skeleton layers to form upper and lower fluororubber adhesive layers, and coat 0.08mm thick fluororubber-chlorobutyl rubber blended rubber surface adhesive on the upper and lower fluororubber adhesive layers. Vulcanize in a vulcanizer to form a 0.40mm thick fluororubber-chlorobutyl rubber blended rubber tape. Vulcanization conditions: first vulcanize at 135°C for 60 minutes, then vulcanize at 145°C for 60 minutes, for a total of 120 minutes.

[0037] The composition ratio of the fluororubber adhesive layer is shown in Table 1:

[0038] Table 1 Ratio of components of fluororubber adhesive layer

[0039]

[0040] The composition ratio of fluororubber-chlorobutyl rubber blend is shown in Table 2:

[0041] Table 2 Ratio of components of fluororubber-chlorobutyl rubber blends

[0042] The properties of the fluororubber-chlorobutyl rubber blend and the properties of the fluororubber-chlorobutyl rubber blend tape were tested. The test methods and test results are shown in Table 3.

[0043] Table 3 Performance test results

[0044]

[0045] In Table 3: The adhesion strength between the adhesive layer and the fabric specifically refers to the adhesion strength between the fluororubber-chlorobutyl rubber surface adhesive layer and the nylon skeleton layer.

[0046] In Table 3: The surface rubber performance of the fluororubber-chlorobutyl rubber blend rubber is tested after the surface rubber is vulcanized. The vulcanization conditions are: 160℃×40min, and the vulcanization pressure is 20MPa.

[0047] According to the test results in Table 3, it can be seen that the fluororubber-chlorobutyl rubber blended rubber used in the present invention has good mechanical properties and flame retardancy, and the adhesive tape prepared using the fluororubber-chlorobutyl rubber blended rubber as the surface rubber layer has good flame retardancy, good anti-toxic and chemical penetration resistance, good heat resistance and cold resistance, and the fluororubber-chlorobutyl rubber surface rubber layer has high adhesion strength to the fabric.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fluororubber-chlorinated butyl rubber blended rubber plaster, characterized in that: The invention comprises a first fluororubber-chlorobutyl rubber blended rubber surface rubber layer, a first fluororubber adhesive layer, a nylon skeleton layer, a second fluororubber adhesive layer and a second fluororubber-chlorobutyl rubber blended rubber surface rubber layer which are stacked in sequence; the first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer contain a homogenizer, a flame retardant and an acid absorbent; The first fluororubber adhesive layer and the second fluororubber adhesive layer are independently composed of the following components in parts by weight: 100 parts of 26-type fluororubber, 3 parts of stearic acid, 5 parts of magnesium oxide, 6 parts of calcium hydroxide, 8 parts of white carbon black, 1.5 parts of adhesive RS, 5 parts of adhesive RA-65, 1.5 parts of peroxide curing agent, and 3.0 parts of accelerator; The first fluororubber-chlorobutyl rubber blended rubber surface rubber layer and the second fluororubber-chlorobutyl rubber blended rubber surface rubber layer are independently composed of the following components in parts by weight: 50 parts of 26 type fluororubber, 50 parts of chlorobutyl rubber 1066, 2 parts of stearic acid, 10 parts of flame retardant, 6 parts of acid absorber, 10 parts of antimony trioxide, 25 parts of decabromodiphenyl ether, 25 parts of zinc borate, 15 parts of leveling agent 60NS, 1.5 parts of peroxide vulcanizing agent, and 3.0 parts of accelerator; The thickness of the first fluororubber adhesive layer and the second fluororubber adhesive layer are independently 0.01 to 0.02 mm; The thickness of the first fluororubber-chlorinated butyl rubber blended rubber surface rubber layer and the second fluororubber-chlorinated butyl rubber blended rubber surface rubber layer are independently 0.06-0.1 mm.

2. The fluororubber-chlorobutyl rubber blend rubber tape according to claim 1, characterized in that: The thickness of the fluororubber-chlorinated butyl rubber blended rubber tape is 0.36-0.44 mm.

3. According to the fluororubber-chlorobutyl rubber blended rubber tape of claim 1, the flame retardant is magnesium oxide, and the acid absorbent is calcium hydroxide.

4. The fluororubber-chlorobutyl rubber blend rubber tape according to claim 1, characterized in that: The gram weight of the nylon skeleton layer is 100±10g / m 2 .

5. The method for preparing the fluororubber-chlorobutyl rubber blended rubber tape according to any one of claims 1 to 4, characterized in that: The following steps are involved: Fluororubber adhesive is coated on the upper and lower surfaces of the nylon skeleton layer to form a first fluororubber adhesive layer and a second fluororubber adhesive layer, and fluororubber-chlorinated butyl rubber blended rubber surface adhesive layers are coated on the surfaces of the first fluororubber adhesive layer and the second fluororubber adhesive layer to form a first fluororubber-chlorinated butyl rubber blended rubber surface adhesive layer and a second fluororubber-chlorinated butyl rubber blended rubber surface adhesive layer, and the obtained layered structure is vulcanized to obtain a fluororubber-chlorinated butyl rubber blended rubber tape.

6. The preparation method according to claim 5, characterized in that: The vulcanization includes a first stage and a second stage which are carried out in sequence. The temperature of the first stage is 100-140° C. and the time is 60±10 min. The temperature of the second stage is 140-145° C. and the time is 60±10 min.

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