CN110615990A - Temperature-resistant acid-resistant fluorosilicone rubber elastomer material and preparation method and application thereof - Google Patents
Temperature-resistant acid-resistant fluorosilicone rubber elastomer material and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a temperature-resistant acid-resistant fluorosilicone rubber elastomer material, a preparation method and application thereof, wherein the acid-resistant temperature-resistant fluorosilicone rubber elastomer material comprises 107 room temperature silicone rubber, fluorosilicone resin, acid-resistant filler, a cross-linking agent and an additive, and is prepared by the following method: dehydrating and blending 107 room temperature silicone rubber, fluorosilicone resin, acid-resistant filler, high temperature-resistant filler, carbon black and rubber plasticizer at 100-150 ℃ and 0.06-0.09 MPa to obtain a component A; uniformly mixing a cross-linking agent, a rubber plasticizer and a catalyst to obtain a component B; and (3) uniformly mixing the component A and the component B according to the weight ratio of A to B being 10-20: 1 at room temperature, and defoaming for 3-10 minutes under the condition of 0.08-0.10 MPa to obtain the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material. The material is moisture cured at room temperature or low temperature, and compared with other anticorrosive materials, the material has excellent acid corrosion resistance, high temperature resistance, high elasticity and high adhesion, and the preparation process is simple and the construction is convenient.
Description
Technical Field
The invention belongs to the field of desulfurization and denitrification chimney building anticorrosive materials, and particularly relates to a temperature-resistant acid-resistant fluorosilicone rubber elastomer material as well as a preparation method and application thereof.
Background
Since the first industrial revolution, the chemical industry has been rapidly developed for hundreds of years, and the harm of chemical pollutants to the environment is becoming serious. The chemical industry inevitably produces waste gas, waste liquid, waste residue and other three-waste pollutants in the production process, and the pollutants have very high temperature and very strong corrosivity to chemical production equipment. In order to solve the problem, chemical plants generally brush acid-resistant anticorrosive paint on various sewage pipes and devices of the waste treatment system to solve the problem of strong corrosion of the waste treatment system. Particularly in recent years, with the increasing awareness of environmental protection, the development of acid-resistant and temperature-resistant materials has been increasing.
Currently, as an anticorrosive coating, a flake coating, a polyurea elastomer coating, and a silicone sealant are used in many cases. For example, chinese patent CN100393829A discloses a vinyl resin glass flake coating, which has the characteristics of good anti-permeability and wear resistance, and its temperature resistance and corrosion resistance are fully proved by engineering practice, and can instantly resist the high temperature of 220 ℃ when working at 180 ℃ for a long time, but the flake coating has almost no elasticity, and the flake lining is easy to crack and fall off during use, which causes equipment corrosion. Chinese patent CN101280153A discloses a high-temperature-resistant acid-resistant polyurea anticorrosive paint for a desulfurization flue lining, which has excellent waterproof and corrosion-resistant characteristics, but the material has poor elasticity and cannot be directly used for bonding the joint part of a device. Chinese patent CN101638518A discloses an acid gas corrosion resistant high temperature resistant room temperature vulcanized silicone rubber which has good elasticity, can be used as a joint part of an adhesive bonding device, has excellent high temperature resistance, can be used at 180 ℃ for a long time, but is not resistant to corrosion of strong mixed acid, is easy to lose elasticity after long-term use and has acid liquor leakage phenomenon.
The chemical industry is compelling to solve the corrosion problem of three wastes to equipment, and as the corrosive substances of the chemical industry generally have the characteristics of strong acid, high temperature and the like, the materials which have excellent acid resistance, temperature resistance, high elasticity and bonding property are few in the prior chemical anti-corrosion materials. Therefore, it is very important to develop an acid-resistant and temperature-resistant elastomer material with excellent comprehensive performance.
Disclosure of Invention
Aiming at the defects of the performance of the existing acid-resistant and temperature-resistant material, the invention adds the fluorosilicone resin with low surface energy into the room temperature vulcanized silicone rubber to prepare the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material, and the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material is a bi-component product, has high elasticity after vulcanization, has excellent acid resistance and high temperature resistance, and can be used as a chemical anticorrosion material.
The technical scheme provided by the invention is as follows:
a temperature-resistant acid-resistant fluorosilicone rubber elastomer material is composed of an A component and a B component which are independently packaged, wherein the weight ratio of the A component to the B component is 10-20: 1;
the component A comprises 107 room temperature silicone rubber, fluorosilicone resin, acid-resistant filler, high temperature-resistant filler, carbon black and a rubber plasticizer, wherein the weight ratio of the components is as follows: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 15-40: 50-500: 20-150: 30-200: 20 to 210;
the component B comprises a rubber plasticizer, a cross-linking agent and a catalyst, wherein the weight ratio of the components is as follows: rubber plasticizer: a crosslinking agent: 10-40% of catalyst: 1-10: 0.01 to 0.1.
On the basis of the technical scheme, the weight ratio of the component A to the component B is 12-18: 1.
on the basis of the technical scheme, the weight ratio of the component A to the component B is 15: 1.
on the basis of the technical scheme, the component A comprises the following components in percentage by weight: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 10-20: 400-500: 60-150: 30-100: 20 to 120.
On the basis of the technical scheme, the component A comprises the following components in percentage by weight: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 14-16: 430-470: 80-100: 40-60: 80-100.
On the basis of the technical scheme, the component A comprises the following components in percentage by weight: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 15: 450: 90: 50: 100.
on the basis of the technical scheme, the component B comprises the following components in percentage by weight: rubber plasticizer: a crosslinking agent: the catalyst is 10-20: 1-10: 0.01 to 0.1.
On the basis of the technical scheme, the component B comprises the following components in percentage by weight: rubber plasticizer: a crosslinking agent: catalyst 10: 8-10: 0.05 to 0.1.
On the basis of the technical scheme, 107 room temperature silicone rubber with the viscosity range of 1000-.
Based on the technical scheme, the fluorosilicone resin with the particle size range of 0.1-100 mu m is selected.
On the basis of the technical scheme, the acid-resistant filler is selected from at least one of silicon micropowder and kaolin, and the particle size of the acid-resistant filler is 0.01-5 mu m.
On the basis of the technical scheme, the cross-linking agent is selected from one or more of alkoxy silane, ketoxime silane and acyloxy silane; the rubber plasticizer is at least one of paraffin oil, aromatic oil and rubber oil; the catalyst is selected from any one of dibutyltin dilaurate, dibutyltin diacetate, dibutyltin dioctoate and stannous octoate.
On the basis of the technical scheme, the 107 room temperature silicone rubber is alpha, omega-dihydroxy polydimethylsiloxane, and the viscosity range of the silicone rubber is 10000 mpa.s; the grain size range of the fluorosilicone resin is 0.2 mu m; the acid-resistant filler is silicon micro powder with the particle size of 0.2 mu m; the high-temperature resistant filler is rutile titanium dioxide, and the average grain diameter is less than or equal to 0.3 mu m; the cross-linking agent is alkoxy silane; the rubber plasticizer is paraffin oil; the catalyst was dibutyltin dilaurate.
A method for preparing a temperature-resistant and acid-resistant fluorosilicone rubber elastomer material comprises the following steps:
(1) adding 100 parts by weight of 107 room-temperature silicone rubber, 15-40 parts by weight of fluorosilicone resin, 50-500 parts by weight of acid-resistant filler, 20-150 parts by weight of high-temperature-resistant filler, 30-200 parts by weight of carbon black and 20-210 parts by weight of rubber plasticizer into a vacuum kneader at the temperature of 70-90 ℃ to mix uniformly, and dehydrating and blending for 30-200 minutes under the conditions that the temperature is 80-150 ℃ and the vacuum degree is 0.08-0.10 MPa to obtain a component A;
(2) adding 10-40 parts by weight of rubber plasticizer, 1-10 parts by weight of cross-linking agent and 0.01-0.1 part by weight of catalyst into a planetary machine, and stirring for 10-60 minutes in vacuum to obtain a component B;
(3) and (4) taking the component A and the component B, and respectively and independently packaging.
The use method of the temperature-resistant acid-resistant fluorosilicone rubber elastomer material comprises the following steps: and (3) uniformly mixing the component A and the component B according to a ratio at room temperature, and defoaming for 3-10 minutes under the condition that the vacuum degree is 0.08-0.10 MPa to obtain the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material.
The invention has the following advantages and beneficial effects:
1. the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared by the invention adopts a fluorosilicone resin system, overcomes the defect that other anticorrosive materials are not resistant to mixed acid, has excellent acid resistance, simultaneously gives consideration to the high temperature resistance of the anticorrosive materials, and has wide application fields.
2. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared by the invention has better elongation at break, and overcomes the defects of no elasticity and high internal stress of the traditional anticorrosive paint.
3. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material disclosed by the invention is simple in preparation process and easy to carry out industrial production.
4. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared by the invention is packaged by two components, can be directly used after being uniformly mixed, and is simple to construct and convenient to operate.
5. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared by the invention does not contain a volatile solvent, and no harmful substances are generated in the curing process, so that the environment-friendly performance is excellent.
6. The elongation attenuation performance of the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared by the invention after high-temperature aging (120 ℃ for 24h) and mixed acid soaking treatment (50 ℃ for 14 days) is superior to that of a foreign famous brand.
Detailed Description
The present invention is described in detail below by way of examples, and it should be noted that the following examples are only for the purpose of further illustrating the technical solutions of the present invention, and are not to be construed as limiting the scope of the present invention, and those skilled in the art can make some insubstantial modifications and adaptations in accordance with the present invention.
The fluorine-modified silicone resins used in the following examples were purchased from Shanghai Hui research New materials, Inc.
Example 1
100 parts by weight of 107 room temperature silicone rubber with rotational viscosity of 10000mpa.s, 15 parts by weight of fluorosilicone resin with particle size of 0.2 mu m, 450 parts by weight of silicon micropowder with particle size of 0.2 mu m, 100 parts by weight of rutile type titanium dioxide with average particle size of 0.1 mu m, 50 parts by weight of carbon black and 90 parts by weight of paraffin oil are added into a vacuum kneader with the temperature of 80 ℃ and mixed evenly; dehydrating and blending for 120 minutes under the conditions that the temperature is 80 ℃ and the vacuum degree is-0.09 MPa to obtain a component A;
adding 10 parts by weight of methyltrimethoxysilane, 10 parts by weight of paraffin oil and 0.08 part by weight of dibutyltin dilaurate into a stirrer together, and stirring for 7 minutes to obtain a component B;
at room temperature, uniformly mixing the component A and the component B according to the mass ratio of A to B being 15 to 1, and defoaming for 5 minutes under the condition that the vacuum degree is 0.085MPa to obtain the acid-resistant and temperature-resistant fluorosilicone rubber elastomer material, wherein the details of the test results of the product performance are shown in Table 2.
Example 2
100 parts by weight of 107 room temperature silicone rubber with rotational viscosity of 10000mpa.s, 20 parts by weight of fluorosilicone resin with particle size of 0.2 mu m, 450 parts by weight of silicon micropowder with particle size of 0.2 mu m, 100 parts by weight of rutile type titanium dioxide with average particle size of 0.1 mu m, 50 parts by weight of carbon black and 90 parts by weight of paraffin oil are added into a vacuum kneader with the temperature of 80 ℃ and mixed evenly; dehydrating and blending for 120 minutes under the conditions that the temperature is 80 ℃ and the vacuum degree is-0.09 MPa to obtain a component A;
adding 10 parts by weight of methyltrimethoxysilane, 10 parts by weight of paraffin oil and 0.08 part by weight of dibutyltin dilaurate into a stirrer together, and stirring for 7 minutes to obtain a component B;
at room temperature, uniformly mixing the component A and the component B according to the mass ratio of A to B being 15 to 1, and defoaming for 5 minutes under the condition that the vacuum degree is 0.085MPa to obtain the acid-resistant and temperature-resistant fluorosilicone rubber elastomer material, wherein the details of the test results of the product performance are shown in Table 2.
Example 3
100 parts by weight of 107 room temperature silicone rubber with rotational viscosity of 10000mpa.s, 25 parts by weight of fluorosilicone resin with particle size of 0.2 mu m, 450 parts by weight of silicon micropowder with particle size of 0.2 mu m, 100 parts by weight of rutile type titanium dioxide with average particle size of 0.1 mu m, 50 parts by weight of carbon black and 90 parts by weight of paraffin oil are added into a vacuum kneader with the temperature of 80 ℃ and mixed evenly; dehydrating and blending for 120 minutes under the conditions that the temperature is 80 ℃ and the vacuum degree is-0.09 MPa to obtain a component A;
adding 10 parts by weight of methyltrimethoxysilane, 10 parts by weight of paraffin oil and 0.08 part by weight of dibutyltin dilaurate into a stirrer together, and stirring for 7 minutes to obtain a component B;
at room temperature, uniformly mixing the component A and the component B according to the mass ratio of A to B being 15 to 1, and defoaming for 5 minutes under the condition that the vacuum degree is 0.085MPa to obtain the acid-resistant and temperature-resistant fluorosilicone rubber elastomer material, wherein the details of the test results of the product performance are shown in Table 2.
Example 4
100 parts by weight of 107 room temperature silicone rubber with rotational viscosity of 10000mpa.s, 30 parts by weight of fluorosilicone resin with particle size of 0.2 mu m, 450 parts by weight of silicon micropowder with particle size of 0.2 mu m, 100 parts by weight of rutile type titanium dioxide with average particle size of 0.1 mu m, 50 parts by weight of carbon black and 90 parts by weight of paraffin oil are added into a vacuum kneader with the temperature of 80 ℃ and mixed evenly; dehydrating and blending for 120 minutes under the conditions that the temperature is 80 ℃ and the vacuum degree is-0.09 MPa to obtain a component A;
adding 10 parts by weight of methyltrimethoxysilane, 10 parts by weight of paraffin oil and 0.08 part by weight of dibutyltin dilaurate into a stirrer together, and stirring for 7 minutes to obtain a component B;
at room temperature, uniformly mixing the component A and the component B according to the mass ratio of A to B being 15 to 1, and defoaming for 5 minutes under the condition that the vacuum degree is 0.085MPa to obtain the acid-resistant and temperature-resistant fluorosilicone rubber elastomer material, wherein the details of the test results of the product performance are shown in Table 2.
TABLE 1 amounts (in parts by weight) of each component in examples 1-4
The temperature-resistant and acid-resistant fluorosilicone rubber elastomer materials prepared in examples 1 to 4 were tested for post-curing performance before construction, and the cured dumbbell test pieces were tested in a mixed acid (concentration of each component in the mixed acid: H) for simulating the inner wall environment of a thermal power chimney2SO4:9.5wt％，HNO30.5 wt%, HCl 0.1 wt%, HF 0.1 wt%), for 14 days, and aging at 120 deg.C for 24 hours. Testing the working life and the sag according to GB/T13477 and testing the Shore hardness according to GB/T531; testing tensile strength and elongation at break according to GB/T528; the shear strength was measured according to GB/T7124 and the results are shown in Table 2.
TABLE 2 comparison of the results of the performance tests of the temperature and acid resistant fluorosilicone rubber elastomer materials prepared in examples 1-4
The results show that compared with the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared in example 1, the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material prepared in examples 2 to 4 has higher elongation, and still maintains better mechanical strength and elasticity after being mixed with acid and subjected to high temperature.
TABLE 3 comparison of the properties of the temperature and acid resistant fluorosilicone rubber elastomer material prepared in example 1 with the acid and temperature resistant materials of a foreign famous competitive product (Hangaobnggdo, Germany)
TABLE 4 decay comparison of the performance of the acid and temperature resistant fluorosilicone rubber elastomer material prepared in example 1
The above embodiments are merely for clearly illustrating the embodiments and are not intended to limit the embodiments. Other variants and modifications of the invention, which are obvious to those skilled in the art and can be made on the basis of the above description, are not necessary or exhaustive for all embodiments, and are therefore within the scope of the invention.
Claims (10)
1. A temperature-resistant acid-resistant fluorosilicone rubber elastomer material is composed of an A component and a B component which are independently packaged, and is characterized in that: the weight ratio of the component A to the component B is 10-20: 1;
the component A comprises 107 room temperature silicone rubber, fluorosilicone resin, acid-resistant filler, high temperature-resistant filler, carbon black and a rubber plasticizer, wherein the weight ratio of the components is as follows: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 10-40: 50-500: 20-150: 30-200: 20 to 210;
the component B comprises a rubber plasticizer, a cross-linking agent and a catalyst, wherein the weight ratio of the components is as follows: rubber plasticizer: a crosslinking agent: 10-40% of catalyst: 1-10: 0.01 to 0.1.
2. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material of claim 1, wherein: the weight ratio of the component A to the component B is 12-18: 1.
3. the temperature-resistant acid-resistant fluorosilicone rubber elastomer material of claim 2, wherein: the weight ratio of the component A to the component B is 15: 1.
4. the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material of claim 1, wherein: in the component A, the weight ratio of each component is as follows: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 10-20: 400-500: 60-150: 30-100: 20 to 120 parts; in the component B, the weight ratio of each component is as follows: rubber plasticizer: a crosslinking agent: the catalyst is 10-20: 1-10: 0.01 to 0.1.
5. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material of claim 4, wherein: in the component A, the weight ratio of each component is as follows: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 14-16: 430-470: 80-100: 40-60: 80-100 parts of; in the component B, the weight ratio of each component is as follows: rubber plasticizer: a crosslinking agent: catalyst 10: 8-10: 0.05 to 0.1.
6. The temperature-resistant and acid-resistant fluorosilicone rubber elastomer material of claim 5, wherein: in the component A, the weight ratio of each component is as follows: 107 room temperature silicone rubber: fluorine-silicon resin: acid-resistant filler: high-temperature resistant filler: carbon black: rubber plasticizer 100: 15: 450: 90: 50: 100, respectively; in the component B, the weight ratio of each component is as follows: rubber plasticizer: a crosslinking agent: catalyst 10: 10: 0.08.
7. the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material according to any one of claims 1 to 6, wherein: the 107 room temperature silicone rubber is alpha, omega-dihydroxy polydimethylsiloxane, and the viscosity range is 1000-80000 mpa.s; the grain size range of the fluorosilicone resin is 0.1-100 mu m; the acid-resistant filler is at least one of silicon micropowder and kaolin, and the particle size of the acid-resistant filler is 0.01-5 mu m; the high-temperature resistant filler is rutile titanium dioxide, and the average grain size is less than or equal to 0.3 mu m; the cross-linking agent is one or more of alkoxy silane, ketoxime silane and acyloxy silane; the rubber plasticizer is at least one of paraffin oil, aromatic oil and rubber oil; the catalyst is any one of dibutyltin dilaurate, dibutyltin diacetate, dibutyltin dioctoate and stannous octoate.
8. The temperature-resistant acid-resistant fluorosilicone rubber elastomer material of claim 7, wherein: the 107 room temperature silicone rubber is alpha, omega-dihydroxy polydimethylsiloxane, and the viscosity range of the 107 room temperature silicone rubber is 10000 mpa.s; the particle size range of the fluorosilicone resin is 0.2 mu m; the acid-resistant filler is silicon micro powder with the particle size of 0.2 mu m; the cross-linking agent is alkoxy silane; the rubber plasticizer is paraffin oil; the catalyst is dibutyltin dilaurate.
9. A method for preparing the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material of any one of claims 1-8, comprising the steps of:
(1) adding 100 parts by weight of 107 room-temperature silicone rubber, 15-40 parts by weight of fluorosilicone resin, 50-500 parts by weight of acid-resistant filler, 20-150 parts by weight of high-temperature-resistant filler, 30-200 parts by weight of carbon black and 20-210 parts by weight of rubber plasticizer into a vacuum kneader at the temperature of 70-90 ℃ to mix uniformly, and dehydrating and blending for 30-200 minutes under the conditions that the temperature is 80-150 ℃ and the vacuum degree is 0.08-0.10 MPa to obtain a component A;
(2) adding 10-40 parts by weight of rubber plasticizer, 1-10 parts by weight of cross-linking agent and 0.01-0.1 part by weight of catalyst into a planetary machine, and stirring for 10-60 minutes in vacuum to obtain a component B;
(3) taking the component A and the component B in the weight ratio of claim 1, and independently packaging the components.
10. The use method of the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material according to any one of claims 1 to 8, comprising the steps of: and (3) uniformly mixing the component A and the component B at room temperature, and defoaming for 3-10 minutes under the condition that the vacuum degree is 0.08-0.10 MPa to obtain the temperature-resistant and acid-resistant fluorosilicone rubber elastomer material.
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| CN115806796A (en) * | 2021-12-29 | 2023-03-17 | 上海市塑料研究所有限公司 | Room-temperature vulcanized oil-resistant fireproof organic silicon adhesive and preparation method thereof |
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