CN108559150B - Low-hardness high-strength rubber for white butyl adhesive tape and preparation method and application thereof - Google Patents
Low-hardness high-strength rubber for white butyl adhesive tape and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to rubber for a low-hardness high-strength white butyl adhesive tape, a preparation method and application thereof, and belongs to the field of rubber materials. The butyl rubber fabric rubber comprises the following raw materials in percentage by weight: 100 parts of halogenated butyl rubber, 5-8 parts of zinc oxide, 1-3 parts of stearic acid, 15-25 parts of filler, 0-5 parts of vaseline, 1-3 parts of plasticizer, 1-1.5 parts of white pigment, 1.8-3.7 parts of accelerator, 0.8-1.2 parts of vulcanizing activator and 1-2 parts of vulcanizing agent. The butyl adhesive tape prepared from the rubber has excellent air tightness and can be used for packaging products with air isolation requirements; the rubber has the characteristics of low hardness, high strength, high elongation at break, good aging performance and good low-temperature resistance, and the prepared elastic garment is soft and high in strength and is not easy to damage.
Description
Technical Field
The invention relates to the field of rubber materials, in particular to rubber for a low-hardness high-strength white butyl adhesive tape, and a preparation method and application thereof.
Background
Currently relevant patents are body armor generally used to prevent bullets from harming the body, and there is no body armor for packing bombs for the time being. The elastic clothes are a sealed package product, the elastic clothes can be sleeved on an elastic body, after a zipper is closed, negative pressure is formed by extracting internal air, a dry, dust-free, salt mist-free and closed storage environment is formed, the damage of clothes, dampness, mildew and the like of the packaged product is greatly reduced, the service performance of the packaged product is kept for a long time, and the elastic clothes and the zipper are required to have excellent air tightness. In addition, the elastic garment should have certain strength and wear resistance.
Disclosure of Invention
The invention aims to provide the rubber for the low-hardness high-strength white butyl adhesive tape, and the preparation method and the application thereof.
The technical scheme of the invention is as follows: the rubber for the low-hardness high-strength white butyl tape comprises the following components in parts by weight: 100 parts of halogenated butyl rubber, 5-8 parts of zinc oxide, 1-3 parts of stearic acid, 15-25 parts of filler, 0-5 parts of vaseline, 1-3 parts of plasticizer, 1-1.5 parts of white pigment, 1.8-3.7 parts of accelerator, 0.8-1.2 parts of vulcanizing activator and 1-2 parts of vulcanizing agent.
Preferably, the rubber for the low-hardness high-strength white butyl rubber comprises the following components in parts by weight: 100 parts of halogenated butyl rubber, 5 parts of zinc oxide, 1.5 parts of stearic acid, 20 parts of filler, 3 parts of vaseline, 1 part of plasticizer, 1.5 parts of white pigment, 2.2 parts of accelerator, 1 part of vulcanization activator and 1 part of vulcanizing agent.
Preferably, the halogenated butyl rubber is brominated butyl rubber or chlorinated butyl rubber, such as brominated butyl rubber 2211, brominated butyl rubber 2244, chlorinated butyl rubber 1066 and the like, and brominated butyl rubber is more preferable;
the filler is white carbon black, and transparent white carbon black is preferred, so that the reinforcing effect is good;
the plasticizer is an ester plasticizer, such as dioctyl phthalate, dibutyl phthalate, dioctyl sebacate, dibutyl sebacate, dioctyl adipate and the like;
preferably, the accelerator is a mixed preparation of thiazoles, thiurams and thiourea accelerators, and the weight ratio of the thiazoles, the thiurams and the thiourea accelerators is 0.5-1.5: 0.8-1.2: 0.5-1, wherein the thiazole accelerator comprises any one of 2, 2' -dithiodibenzothiazole, 2-mercaptobenzothiazole or 2-mercaptobenzothiazole cyclohexylammonium salt; the thiuram accelerator comprises any one of tetramethylthiuram disulfide, tetramethylthiuram monosulfide and tetraethylthiuram disulfide; the thiourea accelerant is ethylene thiourea;
the vulcanizing activator is triethanolamine;
the vulcanizing agent is sulfur.
The preparation method of the rubber for the low-hardness high-strength white butyl tape comprises the following steps:
a: plasticating raw rubber: putting halogenated butyl rubber into an internal mixer for plastication to obtain plasticated rubber material;
b: mixing the rubber materials: adding 1/2 filler, titanium dioxide and zinc oxide into the plasticated rubber prepared in the step A according to the formula amount, mixing the rubber for the first time, adding 1/2 filler, vaseline, plasticizer and stearic acid, mixing for 2-3 minutes, adding a vulcanization activator and a thiazole accelerator, mixing the rubber for the second time, and discharging the rubber after the rubber is well pressed to obtain rubber compound after rubber discharge;
c: blanking: b, smashing the rubber compound after the rubber is discharged, which is prepared in the step B, on an open mill to obtain the rubber compound after the rubber is smashed;
d: adding an accelerant: adding thiuram accelerators and thiourea accelerators into the rubber compound after the ramming in the step C according to the formula amount, and then uniformly mixing the accelerators into the rubber compound for mixing;
e: sizing material thin passing: after all the accelerant is completely eaten, sweeping the sizing material and the accelerant on the material receiving disc by using a broom, pouring the material and the accelerant on an open mill, and feeding after left and right broaches;
f: placing the sizing material: and D, standing the sizing material prepared in the step E at room temperature for 8-24 hours.
Preferably, in the step a: the plasticating conditions are that the time is 1 to 3 minutes and the plasticating temperature is 70 to 80 ℃.
In the step B: the first rubber material mixing time is 1.5-2.5 minutes, the second rubber material mixing time is 0.3-0.7 minutes, and the rubber discharge temperature is less than or equal to 105 ℃.
In the step D: the mixing temperature is 40-60 ℃.
In the step E: after all the accelerant is completely eaten, sweeping the rubber material and the accelerant on the take-up pan by using a broom, pouring the rubber material and the accelerant on an open mill, pulling a left broach and a right broach for 3-4 times, adjusting the roller distance to 0.5-0.8mm, feeding the rubber material for 5 times, and discharging, wherein the discharging temperature is 50-70 ℃;
and in the step F, the sizing material prepared in the step E is kept at room temperature for 8-24 hours.
The low-hardness high-strength white rubber for the butyl fabric or the rubber for the low-hardness high-strength white rubber prepared by the preparation method can be used for manufacturing the elastic coating of the packaged bomb.
The invention has the following beneficial effects:
1. the elastic garment main body is a butyl adhesive tape and is formed by vulcanizing butyl adhesive with good air tightness and polyester cotton cloth.
2. Because the elastic clothing is required to be white or light-colored, the rubber formula for the butyl rubberized fabric cannot select carbon black with good reinforcing performance, and only selects white filler with relatively poor reinforcing effect.
3. The elastic coating rubber material has high required strength which is more than or equal to 14.7 MPa; the elongation is high and is more than or equal to 750 percent; the hardness is low, and the hardness is 28-38 degrees, which shows that if the strength of the rubber compound is improved by increasing the parts of the filler, the hardness is higher, the elongation is reduced, and the index requirements cannot be met; if the filler part is reduced to meet the hardness requirement, the strength of the rubber compound may not meet the index requirement, so that the selection and addition of the white filler and the vulcanizing agent in the rubber compound need to be controlled reasonably, and the vulcanization condition is proper to meet the index requirement.
4. The elastic garment rubber material has the characteristics of high tensile strength of more than or equal to 14.7MPa, high tensile elongation of more than or equal to 750 percent, low hardness, Shore A hardness of 28-38 ℃, good aging performance, aging coefficient of more than or equal to 0.8 at 90 ℃ of × 24h, good low temperature resistance, and brittle temperature of less than or equal to-40 ℃, and the prepared elastic garment is soft and high in strength and is not easy to damage.
5. The rubber prepared by the formula has excellent air tightness, and the hydrogen permeability is less than or equal to 4L/m2The elastic coating can be used for packaging products with air isolation requirements, the elastic coating is used for manufacturing elastic coatings of packaged bombs, the initial elastic coating negative pressure difference is 630-690 Pa, and after a negative pressure air tightness test is regularly stored for three months, negative pressure is still kept in the elastic coatings, so that the test requirements are met; after the test of the road transportation of 500km,the negative pressure is still kept in the elastic garment, and the test requirements are met. This excellent gas tightness protects the projectile from moisture, mildew, etc. The rubber has the characteristics of low hardness, high strength, high elongation at break and good aging performance, and the prepared elastic garment is soft and high in strength and is not easy to damage.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to obtain the composite rubber of the present invention, the following examples illustrate the preparation method thereof:
firstly, the processing technology is described:
mixing by an internal mixer:
preparing materials: weighing the raw materials according to the requirements of a formula table.
A: plasticating raw rubber: and (2) putting the weighed halogenated butyl rubber into an internal mixer for plasticating, wherein the plasticating time is 2 minutes, and the plasticating temperature is 70-80 ℃.
B: mixing the rubber materials: and B, adding 1/2 filler, titanium dioxide and zinc oxide into the plasticated rubber material prepared in the step A according to the formula amount, mixing for 2 minutes, then adding 1/2 filler, vaseline, plasticizer and stearic acid, mixing for 2-3 minutes, adding a vulcanization activator and a thiazole accelerator, and mixing for 0.5 minute. And (5) after the rubber materials are well laminated, removing the rubber. The glue discharging temperature is not more than 105 ℃.
C: blanking: and D, smashing the mixed rubber prepared in the step B on an open mill, and preparing to add sulfur on the open mill in the next step.
Vulcanizing by an open mill:
d: adding an accelerant: and D, adding thiuram accelerators and thiourea accelerators into the rubber compound prepared in the step C according to the formula amount, and then pulling left and right to uniformly mix the accelerators into the rubber compound. The mixing temperature was 50 ℃.
E: sizing material thin passing: after all the accelerant is completely eaten, the rubber material and the accelerant on the material receiving disc are swept up by a broom and poured onto an open mill. And (5) feeding after 3-4 times of left and right broaching tools. Adjusting the roller distance of the roller to be 0.7mm at minimum, adding the rubber material for 5 times of thin passing, and discharging. The mixing temperature was 60 ℃.
F: placing the sizing material: the compound prepared in step E was allowed to stand at room temperature for 16 hours.
The following examples illustrate the physical properties of the rubber for low-hardness high-strength white butyl rubber according to the present invention when different weight parts of the formulation are used:
example 1
Table 1 shows the mass parts of the components prepared by the above preparation method:
TABLE 1
The above table 1 shows the components and the amounts of the components of the material of this example, wherein:
mooney viscosity of raw rubber of brominated butyl rubber 2211
Should be 27-37, bromine content should be 1.9% -2.3%, volatile content should not be greater than 0.3%. The brominated butyl rubber has very good low permeability, and can ensure that the sealing elastic garment has excellent air tightness. Compared with chlorinated butyl rubber, brominated butyl rubber has higher vulcanization speed and better adhesive property with other matrixes, so that rubber prepared by adopting brominated butyl rubber as a main rubber seed can be better vulcanized with polyester cotton cloth in a later production procedure to obtain the butyl rubber cloth, and the butyl rubber cloth is also the main body of the elastic garment.
The zinc oxide is indirect zinc oxide. The zinc oxide can form soluble salt with stearic acid to enhance the activation of the accelerator.
The white carbon black is used as a reinforcing agent in the formula, and the reinforcing effect of the white carbon black exceeds that of any other white reinforcing agent. The white carbon black in the sizing material can easily harden the sizing material, so the addition of the softener, the embodiment adopts dioctyl phthalate and stearic acid, and the hardening condition of the sizing material can be improved. The white carbon black vulcanized rubber has the main characteristics of high strength, large elongation, good elasticity and heat resistance and higher tearing strength. As the white carbon black produced by the gas phase method is expensive, the heat generation is easy to generate during mixing in rubber, and the white carbon black produced by the precipitation method is relatively cheap, the hydrated silicon dioxide produced by the precipitation method, namely the transparent white carbon black, is selected.
The titanium dioxide has the function of color mixing, and if the rubber material is partially polluted by environmental influence in the production process, the color of the rubber material can be improved.
The accelerator adopts thiazole accelerator, thiuram accelerator and thiourea accelerator, has quick accelerating effect on rubber, and can endow vulcanized rubber with good aging resistance and wear resistance.
The performance test data of the rubber compound comprise 16.2MPa of tensile strength at break, 880 percent of tensile elongation at break, 29 percent of Shore A hardness, 16 percent of tensile permanent deformation at break, 0.94 of aging coefficient at 90 ℃ for × 24 hours, no damage to a sample at the temperature of minus 40 ℃, and 1.064L/m of hydrogen permeability2。
Example 2
Table 2 shows the mass parts of the components prepared by the above preparation method:
TABLE 2
Mooney viscosity of brominated butyl rubber 2244 crude rubber
41-51 percent, 1.9-2.3 percent of bromine and less than or equal to 0.3 percent of volatile matter. The brominated butyl rubber has very good low permeability, and can ensure that the sealing elastic garment has excellent air tightness. Compared with chlorinated butyl rubber, brominated butyl rubber has higher vulcanization speed and better adhesive property with other matrixes, and the likeThe rubber prepared by adopting the brominated butyl rubber material as the main rubber seed can be better vulcanized with the polyester cotton cloth in the later production procedure to obtain the butyl rubber cloth, which is also the main body of the elastic garment.
The zinc oxide can form soluble salt with stearic acid to enhance the activation of the accelerator.
The white carbon black is used as a reinforcing agent in the formula, and the reinforcing effect of the white carbon black exceeds that of any other white reinforcing agent. The white carbon black in the sizing material can easily harden the sizing material, so the softening agent is added, and the embodiment adopts vaseline, dibutyl phthalate and stearic acid to improve the hardening condition of the sizing material. The white carbon black vulcanized rubber has the main characteristics of high strength, large elongation, good elasticity and heat resistance and higher tearing strength. As the white carbon black produced by the gas phase method is expensive, the heat generation is easy to generate during mixing in rubber, and the white carbon black produced by the precipitation method is relatively cheap, the hydrated silicon dioxide produced by the precipitation method, namely the transparent white carbon black, is selected.
The titanium dioxide has the function of color mixing, and if the rubber material is partially polluted by environmental influence in the production process, the color of the rubber material can be improved.
The accelerator adopts thiazole accelerator, thiuram accelerator and thiourea accelerator, has quick accelerating effect on rubber, and can endow vulcanized rubber with good aging resistance and wear resistance.
The performance test data of the rubber compound comprise that the tensile strength is 17.5MPa, the tensile elongation is 960 percent, the Shore A hardness is 31, the tensile permanent deformation is 18 percent, the aging coefficient is 0.92 at 90 ℃ for × 24h, the sample is not damaged at the temperature of minus 40 ℃, and the hydrogen permeability is 0.936L/m2。
Example 3
Table 3 shows the mass parts of the components prepared by the above preparation method:
| serial number | Raw materials | Dosage (mass fraction) |
| 1 | Chlorinated butyl rubber 1066 | 100 |
| 2 | Zinc oxide | 8 |
| 3 | Stearic acid | 3 |
| 4 | White carbon black | 23 |
| 5 | Vaseline | 3 |
| 6 | Dioctyl sebacate | 1.5 |
| 7 | Titanium white powder | 1.5 |
| 8 | Triethanolamine | 0.8 |
| 9 | 2-mercaptobenzothiazole cyclohexylammonium salts | 1 |
| 10 | Tetraethylthiuram disulfide | 1.1 |
| 11 | Ethylene thiourea | 0.6 |
| 12 | Sulfur | 1.3 |
Chlorinated butyl rubber 1066 is produced by Exxon Mobil, Inc., and has a Mooney viscosity
Should be 33-43%, the chlorine content should be 1.18% -1.34%, and the water content should be no more than 0.3%. The chlorinated butyl rubber has very good low permeability, and can ensure that the sealing elastic garment has excellent air tightness. Compared with brominated butyl rubber, chlorinated butyl rubber has better scorch resistance, reversion resistance, good thermal stability and easy processing.
The zinc oxide can form soluble salt with stearic acid to enhance the activation of the accelerator.
The white carbon black is used as a reinforcing agent in the formula, and the reinforcing effect of the white carbon black exceeds that of any other white reinforcing agent. The white carbon black in the sizing material can easily harden the sizing material, so the softening agent is added, and vaseline, dioctyl sebacate and stearic acid are adopted in the embodiment to improve the hardening condition of the sizing material. The white carbon black vulcanized rubber has the main characteristics of high strength, large elongation, good elasticity and heat resistance and higher tearing strength. As the white carbon black produced by the gas phase method is expensive, the heat generation is easy to generate during mixing in rubber, and the white carbon black produced by the precipitation method is relatively cheap, the hydrated silicon dioxide produced by the precipitation method, namely the transparent white carbon black, is selected.
The titanium dioxide has the function of color mixing, and if the rubber material is partially polluted by environmental influence in the production process, the color of the rubber material can be improved.
The accelerator adopts thiazole accelerator, thiuram accelerator and thiourea accelerator, has quick accelerating effect on rubber, and can endow vulcanized rubber with good aging resistance and wear resistance.
The performance test data of the rubber compound comprise that the breaking strength is 17.5MPa, the breaking elongation is 780%, the Shore A hardness is 36, the breaking permanent deformation is 18%, the aging coefficient is 0.9 at 90 ℃ for × 24h, the sample is not damaged at the temperature of minus 40 ℃, and the hydrogen permeability is 1.181L/m 2.
The experiments show that the low-hardness high-strength white rubber for the butyl tape has excellent air tightness and can be used for packaging products with air isolation requirements; the rubber has the characteristics of low hardness, high strength, high elongation at break, good aging performance and good low-temperature resistance, and the prepared elastic garment is soft and high in strength and is not easy to damage.
Elastic clothes main body sizing material test:
1. comparative test of brominated butyl rubber to chlorinated butyl rubber and butyl rubber
Other systems in the fixed formula only change the main rubber species, and butyl rubber, chlorinated butyl rubber and brominated butyl rubber are respectively used for experiments. The results of the experiment are shown in Table 1.1.
TABLE 1.1 Effect of different gum species on sizing Properties
Remarking: the basic formula comprises 100 parts of rubber seeds, 5 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of sulfur, 4.5 parts of accelerator and 6 parts of plasticizer. The other systems in the formulation were the same, only the gum species was changed.
As can be seen from the results in Table 1.1, butyl rubber has lower strength than halogenated butyl rubber, and butyl rubber has poor vulcanization characteristics, so butyl rubber is not selected in the later test.
The brominated butyl rubber and the chlorinated butyl rubber have higher strength under the same condition, and halogenated butyl rubber (different brands) are selected for research in later tests. The chlorinated butyl rubber has high strength, but the brominated butyl rubber has better comprehensive performance than the chlorinated butyl rubber because the hardness of the rubber compound is larger.
2. Comparative testing of BIIR2211 and BIIR2244
The bromobutyl 2211 and the bromobutyl 2244 are adopted, the other components are unchanged, and the test results are shown in table 1.2.
TABLE 1.2 Effect of BIIR2211 and BIIR2244 on sizing materials
Remarking: the basic formula comprises 100 parts of rubber seeds, 30 parts of white carbon black and 6 parts of plasticizer. The other systems in the formula are the same, and only the glue species is changed.
From the results in table 1.2, it can be seen that bromobutyl rubber 2244 is stronger than bromobutyl rubber 2211. Considering that the hardness of the sizing material is higher, the white carbon black part is adjusted in the later test.
It can also be seen from the test results of example 1 and example 2 that bromobutyl rubber 2244 performs relatively better than bromobutyl rubber 2211 in combination.
3. Example 1 comparative testing of different ratios of raw materials
The a formulation is the formulation in example 1 and the B and C formulations are comparative tests. The different formulations are shown in table 1.3, and the detection results are shown in table 1.4.
TABLE 1.3 comparative testing of different formulations
| Serial number | Components | A formula | B formula | C formula |
| 1 | Brominated butyl rubber 2211 | 100 | 100 | 100 |
| 2 | Zinc oxide | 7 | 5 | 7 |
| 3 | Stearic acid | 1.5 | 1 | 1.5 |
| 4 | White carbon black | 18 | 20 | 21 |
| 5 | Phthalic acid diester | 1 | 1 | 2 |
| 6 | Titanium white powder | 1.2 | 1.2 | 1.2 |
| 7 | Triethanolamine | 1.2 | 1.2 | 1.2 |
| 8 | 2-mercaptobenzothiazole | 0.8 | 1 | 1 |
| 9 | Tetramethylthiuram disulfide | 1.2 | 1 | 1.2 |
| 10 | Ethylene thiourea | 0.5 | 0.5 | 0.5 |
| 11 | Sulfur | 1.2 | 1.2 | 1.2 |
TABLE 1.4 test results
4. Comparative test for filler part
The other components in the formula are not changed, only the parts of the transparent white carbon black are changed, and the test results are shown in table 1.5.
TABLE 1.5 comparative testing of filler parts
Remarking: the basic formula comprises 100 parts of BIIR2211, 5 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of sulfur, 2.8 parts of accelerator, 2 parts of plasticizer and 2 parts of vaseline.
As can be seen from the results in Table 1.5, the reduction of the amount of white carbon has little effect on the tensile strength of the compound, since the butyl rubber itself has a higher strength and the addition of the filler has little effect on the strength of the compound. Meanwhile, due to the reduction of white carbon black, the permanent deformation and hardness of the sizing material are greatly reduced, and the index requirements can be met. When the white carbon black is 15 parts, the rubber material has slightly low breaking strength, and other indexes can meet the index requirements, particularly the permanent deformation of the rubber material is reduced a lot. Therefore, the later test filler part is selected to be 15-25 parts.
5. Comparative test for Accelerator selection
Other components in the formula are unchanged, only the accelerator is changed, and the test results are shown in table 1.6.
TABLE 1.6 comparative testing of different accelerators
Remarking: the basic formula comprises 100 parts of BIIR2211, 5 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of sulfur, 2 parts of plasticizer and 2 parts of vaseline.
As can be seen from the results in Table 1.6, the reduction in the number and type of vulcanizing agents greatly reduces the tensile strength at break of the compound, while the hardness and permanent set of the compound are reduced and the elongation is increased. The reason is that the vulcanizing agent mainly influences the crosslinking density of the rubber compound, and the reduction of the vulcanizing agent greatly reduces the crosslinking density of the rubber compound, so that the strength of the rubber compound is greatly reduced, the hardness is reduced, and the elongation is increased.
According to the test results in table 1.6, the accelerators used in the later test were mixed preparations of thiazole, thiuram and thiourea accelerators.
Claims (6)
1. The rubber for the low-hardness high-strength white butyl tape is characterized by comprising the following components in parts by weight: 100 parts of halogenated butyl rubber, 5-8 parts of zinc oxide, 1-3 parts of stearic acid, 15-25 parts of filler, 0-5 parts of vaseline, 1-3 parts of plasticizer, 1-1.5 parts of white pigment, 1.8-3.7 parts of accelerator, 0.8-1.2 parts of vulcanizing activator and 1-2 parts of vulcanizing agent;
the halogenated butyl rubber is brominated butyl rubber or chlorinated butyl rubber;
the filler is transparent white carbon black;
the plasticizer is an ester plasticizer;
the white pigment is titanium dioxide;
the vulcanizing activator is triethanolamine; the vulcanizing agent is sulfur.
2. The low-hardness high-strength white rubber for butyl fabric according to claim 1, wherein the low-hardness high-strength white rubber for butyl fabric comprises the following components in parts by weight: 100 parts of halogenated butyl rubber, 5 parts of zinc oxide, 1.5 parts of stearic acid, 20 parts of filler, 3 parts of vaseline, 1 part of plasticizer, 1.5 parts of white pigment, 2.2 parts of accelerator, 1 part of vulcanization activator and 1 part of vulcanizing agent.
3. The low-durometer high-strength white rubber for butyl fabric as claimed in claim 1, wherein,
the accelerant is a mixed preparation of thiazole, thiuram and thiourea accelerators, and the weight ratio of the thiazole, the thiuram and the thiourea accelerators is 0.5-1.5: 0.8-1.2: 0.5-1, wherein the thiazole accelerator comprises any one of 2, 2' -dithiodibenzothiazole, 2-mercaptobenzothiazole or 2-mercaptobenzothiazole cyclohexylammonium salt; the thiuram accelerator comprises any one of tetramethylthiuram disulfide, tetramethylthiuram monosulfide and tetraethylthiuram disulfide; the thiourea accelerant is ethylene thiourea;
the vulcanizing activator is triethanolamine;
the vulcanizing agent is sulfur.
4. The method for preparing rubber for low-hardness high-strength white butyl rubber according to any one of claims 1 to 3, wherein the method comprises the following steps:
a: plasticating raw rubber: putting halogenated butyl rubber into an internal mixer for plastication to obtain plasticated rubber material;
b: mixing the rubber materials: adding 1/2 filler, titanium dioxide and zinc oxide into the plasticated rubber prepared in the step A according to the formula amount, mixing the rubber for the first time, adding 1/2 filler, vaseline, plasticizer and stearic acid, mixing for 2-3 minutes, adding a vulcanization activator and a thiazole accelerator, mixing the rubber for the second time, and discharging the rubber after the rubber is well pressed to obtain rubber compound after rubber discharge;
c: blanking: b, smashing the rubber compound after the rubber is discharged, which is prepared in the step B, on an open mill to obtain the rubber compound after the rubber is smashed;
d: adding an accelerant: c, adding thiuram accelerators and thiourea accelerators into the rubber compound after the ramming in the step C, and then pulling left and right to uniformly mix the accelerators into the rubber compound for mixing;
e: sizing material thin passing: after all the accelerant is completely consumed, pouring the sizing material and the accelerant on the material receiving disc into an open mill, and feeding after left and right broaching tools;
f: placing the sizing material: and D, standing the sizing material prepared in the step E at room temperature for 8-24 hours.
5. The method of claim 4, wherein:
in the step A: the plastication conditions are as follows: the temperature is 70-80 ℃, and the time is 1-3 minutes;
in the step B: the first rubber material mixing time is 1.5-2.5 minutes, the second rubber material mixing time is 0.3-0.7 minute, and the rubber discharge temperature is less than or equal to 105 ℃;
in the step D: the mixing temperature is 40-60 ℃;
in the step E: after all the accelerant is completely eaten, sweeping the rubber material and the accelerant on the take-up pan by using a broom, pouring the rubber material and the accelerant on an open mill, pulling a left broach and a right broach for 3-4 times, adjusting the roller distance to 0.5-0.8mm, feeding the rubber material for 5 times, and discharging, wherein the discharging temperature is 50-70 ℃;
and in the step F, the sizing material prepared in the step E is kept at room temperature for 8-24 hours.
6. Use of the low-durometer high-strength white rubber for butyl according to any one of claims 1 to 3 or the low-durometer high-strength white rubber for butyl prepared by the preparation method of any one of claims 4 to 5 for making the coating of packaged bombs.
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| CN112592543B (en) * | 2020-12-09 | 2022-09-13 | 中国第一汽车股份有限公司 | Butyl rubber compound for automobile vibration damping element and preparation method thereof |
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| CN1690109A (en) * | 2004-04-28 | 2005-11-02 | 兰科瑟斯有限公司 | Process to produce silica-filled elastomeric compounds |
| CN105137051A (en) * | 2015-09-15 | 2015-12-09 | 湖北华强科技有限责任公司 | Infusion rubber plug and medicine compatibility fast evaluation method |
| CN106084515A (en) * | 2016-07-06 | 2016-11-09 | 湖北华强科技有限责任公司 | One has puncture plug and preparation method |
| CN107474406A (en) * | 2017-07-18 | 2017-12-15 | 应城市恒天药业包装有限公司 | A kind of medicinal halogenated butyl rubber pad |
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| CN101068689B (en) * | 2004-12-03 | 2010-06-02 | 株式会社普利司通 | Laminate, method for producing the same and tire using the same |
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| CN1690109A (en) * | 2004-04-28 | 2005-11-02 | 兰科瑟斯有限公司 | Process to produce silica-filled elastomeric compounds |
| CN105137051A (en) * | 2015-09-15 | 2015-12-09 | 湖北华强科技有限责任公司 | Infusion rubber plug and medicine compatibility fast evaluation method |
| CN106084515A (en) * | 2016-07-06 | 2016-11-09 | 湖北华强科技有限责任公司 | One has puncture plug and preparation method |
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