CN112795197A - Methyl vinyl silicone rubber and preparation method thereof - Google Patents
Methyl vinyl silicone rubber and preparation method thereof Download PDFInfo
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- CN112795197A CN112795197A CN202011633035.0A CN202011633035A CN112795197A CN 112795197 A CN112795197 A CN 112795197A CN 202011633035 A CN202011633035 A CN 202011633035A CN 112795197 A CN112795197 A CN 112795197A
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 109
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 108
- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical compound C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 153
- 239000005060 rubber Substances 0.000 claims abstract description 152
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 52
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 49
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 49
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims abstract description 19
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000012763 reinforcing filler Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 5
- GTELLNMUWNJXMQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical class OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCC(CO)(CO)CO GTELLNMUWNJXMQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 75
- 238000004073 vulcanization Methods 0.000 claims description 46
- 238000004898 kneading Methods 0.000 claims description 44
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 35
- 229910052731 fluorine Inorganic materials 0.000 claims description 35
- 239000011737 fluorine Substances 0.000 claims description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 238000007493 shaping process Methods 0.000 claims description 21
- -1 methylvinylsiloxane Chemical class 0.000 claims description 10
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 7
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- OLLFKUHHDPMQFR-UHFFFAOYSA-N dihydroxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](O)(O)C1=CC=CC=C1 OLLFKUHHDPMQFR-UHFFFAOYSA-N 0.000 claims description 3
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021485 fumed silica Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 59
- 239000000203 mixture Substances 0.000 description 39
- 238000001035 drying Methods 0.000 description 21
- 239000002390 adhesive tape Substances 0.000 description 20
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 11
- 238000011056 performance test Methods 0.000 description 10
- 239000006229 carbon black Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 description 3
- 235000012438 extruded product Nutrition 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 2
- WRXCBRHBHGNNQA-UHFFFAOYSA-N (2,4-dichlorobenzoyl) 2,4-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1Cl WRXCBRHBHGNNQA-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/05—Polymer mixtures characterised by other features containing polymer components which can react with one another
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention relates to methyl vinyl silicone rubber and a preparation method thereof. The methyl vinyl silicone rubber comprises the following raw materials in parts by weight: 60-70 parts of methyl vinyl silicone rubber crude rubber, 25-35 parts of fluororubber, 2-10 parts of vinyl fluorosilicone oil, 3-6 parts of structure control agent, 2-10 parts of auxiliary vulcanizing agent, 15-30 parts of reinforcing filler, 1-4 parts of vulcanizing agent and 0.1-0.5 part of release agent; the co-vulcanizing agent is at least one of trimethylolpropane trimethacrylate, triallylisocyanurate and ethoxylated trimethylolpropane triacrylate. The methyl vinyl silicone rubber has high oil resistance and high temperature resistance, and the extrusion molding processability is good.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to methyl vinyl silicone rubber and a preparation method thereof.
Background
The silicone rubber has excellent performances of high and low temperature resistance, weather resistance, physiological inertia, low compression set, no odor, colorability and the like, and is widely used in the fields of building doors and windows, electronic appliances, automobile locomotives, aerospace and aviation and the like. The conventional methyl vinyl silicone rubber has poor solvent and oil resistance due to the non-polarity of the conventional methyl vinyl silicone rubber, so that the application of the conventional methyl vinyl silicone rubber in the oil resistance field is limited. In general, in the case of an apparatus using oil-resistant rubber, since the temperature of the working environment is increased due to energy loss during use such as kinetic friction and compression of the apparatus, it is required that the sealing rubber maintains excellent properties at high temperatures for a long period of time. The nitrile rubber used in the market at present has good oil resistance, but poor high and low temperature resistance. Fluororubbers and fluorosilicone rubbers have excellent oil resistance and high temperature resistance, but are expensive and have poor processability. Therefore, the silicone rubber with excellent oil resistance, high and low temperature resistance and low cost is developed, and the application market is wide.
The traditional oil-resistant rubber has the problems of poor high temperature resistance, poor oil resistance, high price, low production efficiency and the like. Chinese invention patent CN 110172251A discloses an oil-resistant silicone rubber and a preparation method thereof, wherein the volume change of the silicone rubber reaches 25% after being soaked in ASTM 3# standard oil for 150 ℃ 24h, and the oil resistance is usually detected to be 150 ℃ 72h, so the oil resistance needs to be further improved. The Chinese invention patent CN 103642248A discloses an oil-resistant silicone rubber composition, which adopts a composition of diatomite and polytetrafluoroethylene to improve the oil resistance, the high temperature resistance reaches 360 ℃, but the oil resistance is only detected by ASTM 1# oil, the oil resistance needs to be improved, and the use of a dipentavulcanizing agent is only suitable for compression molding, and the production efficiency is lower.
In addition, the method blends the fluororubber and the methyl vinyl silicone rubber so as to give consideration to better oil resistance and high temperature resistance, but because the fluorine element in the fluororubber is the element with the strongest electronegativity in the periodic table of the elements, the fluororubber has extremely strong electron-withdrawing effect and enhances the interaction force among molecular chains. Meanwhile, the radius of the fluorine atoms is close to half of a C-C bond, and the fluorine atoms are closely arranged around the C atoms, so that a strong shielding effect is generated on a C-C main chain, and a large steric hindrance is also generated, so that in the blended rubber of silicon rubber and fluororubber, the oil resistance is required to be improved by increasing the addition amount of the fluororubber. However, the flexibility of the molecular chain of the fluororubber is reduced, the rigidity is increased, the processability is poor, the fluororubber with high viscosity has rough and wrong wrinkles on the surface of an extruded product due to larger extrusion expansion coefficient, and the addition amount of the fluororubber needs to be controlled, so that the silicone rubber is a continuous phase and the fluororubber is a dispersed phase in the blended rubber, and the surface of the extruded product is smooth. Therefore, it is difficult to achieve both high oil resistance and good processability in the blending of fluororubber and methyl vinyl silicone rubber.
Disclosure of Invention
Based on the above, the invention provides methyl vinyl silicone rubber and a preparation method thereof. The methyl vinyl silicone rubber has high oil resistance and high temperature resistance, and the extrusion molding processability is good.
The specific technical scheme is as follows:
on one hand, the invention provides methyl vinyl silicone rubber, which comprises the following raw materials in parts by weight:
the co-vulcanizing agent is at least one of trimethylolpropane trimethacrylate (TMPTMA), Triallylisocyanurate (TAIC) and ethoxylated trimethylolpropane triacrylate (ETPTA).
In one embodiment, the vinyl fluorosilicone oil is a terminal vinyl fluorosilicone oil.
In one embodiment, the fluorine content of the vinyl fluorosilicone oil is 50% to 70%.
In one embodiment, the co-curative is trimethylolpropane trimethacrylate.
In one embodiment, the raw methyl vinyl silicone rubber comprises a first raw methyl vinyl silicone rubber and a second raw methyl vinyl silicone rubber; the molecular weight of the first methyl vinyl silicone rubber raw rubber is 50-70 ten thousand, the molar content of vinyl is 0.02-0.05%, the molecular weight of the second methyl vinyl silicone rubber raw rubber is 50-70 ten thousand, and the molar content of vinyl is 0.19-0.25%.
In one embodiment, the fluororubber is a binary fluororubber with the fluorine content of 60-70% and/or a ternary fluororubber with the fluorine content of 60-70%.
In one embodiment, the structure control agent is at least one of α, ω -dihydroxypolydimethylsiloxane, diphenylsilanediol, hexamethyldisilazane, and dimethyldiethoxysilane.
In one embodiment, the reinforcing filler is at least one of precipitated silica and fumed silica, and the specific surface area is 150m2/g～400m2/g。
In another aspect of the present invention, there is provided a method for preparing the methyl vinyl silicone rubber, comprising the steps of:
kneading the methyl vinyl silicone rubber crude rubber, the reinforcing filler, the vinyl fluorosilicone oil, the structure control agent and the release agent, then adding the preheated fluororubber and the auxiliary vulcanizing agent, and kneading to prepare a rubber compound;
mixing the rubber compound with the vulcanizing agent, and then carrying out thin-pass treatment to prepare a rubber compound rubber sheet;
and extruding and vulcanizing the rubber sheet of the rubber compound.
In one embodiment, the kneading is performed by first kneading for 0.5 to 4 hours, then heating to 100 to 200 ℃ and kneading for 0.5 to 4 hours, then keeping the temperature unchanged, and continuing kneading for 0.5 to 4 hours under a vacuum degree of-0.1 to 0.10 MPa.
In one embodiment, the vulcanization refers to that the extrudate is firstly vulcanized and shaped at the temperature of 400-600 ℃, then is subjected to primary vulcanization at the temperature of 200-300 ℃, and then is subjected to secondary vulcanization at the temperature of 150-250 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides methyl vinyl silicone rubber, which takes methyl vinyl silicone rubber as a main body, keeps the high temperature resistance of the silicone rubber, improves the polarity of the silicone rubber by introducing fluorine-containing polar groups into fluororubber and end vinyl fluorosilicone oil, simultaneously generates crosslinking reaction between methyl and vinyl and between methyl under the action of a specific vulcanizing agent auxiliary agent, can shorten the vulcanizing time, improves the crosslinking density, is beneficial to the crosslinking reaction between fluororubber C-H and methyl vinyl silicone rubber, and simultaneously can absorb hydrogen fluoride released in the vulcanizing process of the fluororubber, promote the silicone rubber, the fluororubber and the vinyl fluorosilicone oil to generate a synergistic effect while improving the mechanical property of the silicone rubber, and improve the oil resistance of the silicone rubber. Therefore, under the condition that the addition amount of the fluororubber is small, better oil resistance and high temperature resistance can be realized, the extrusion molding performance of the system is good, the surface of an extruded product is smooth, and the fluororubber is suitable for extrusion molding processing. In addition, the addition of the vinyl fluorosilicone oil can not only perform a crosslinking reaction between the vinyl and the methyl vinyl silicone rubber, but also play a role of a compatilizer, and is beneficial to improving the dispersibility of the fluororubber in the methyl vinyl silicone rubber.
In conclusion, the methyl vinyl silicone rubber is modified, so that the oil resistance is improved on the premise of keeping excellent high temperature resistance, low cost and good processability. And can be used for compression molding, also can be used to high production efficiency's extrusion moulding simultaneously, improve production efficiency greatly. Can be widely applied to other fields such as aerospace, automobile industry, mechanical oil seal, oil exploitation, oil refining and the like.
Detailed Description
The methyl vinyl silicone rubber and the preparation method thereof of the present invention will be described in further detail with reference to specific examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention provides methyl vinyl silicone rubber which comprises the following raw materials in parts by weight:
wherein the co-vulcanizing agent is at least one of trimethylolpropane trimethacrylate (TMPTMA), Triallylisocyanurate (TAIC) and ethoxylated trimethylolpropane triacrylate (ETPTA).
In one specific example, the mass fraction of the fluororubber in the methyl vinyl silicone rubber is 18% to 22%.
Further, the vinyl fluorosilicone oil is terminal vinyl fluorosilicone oil. Therefore, the crosslinking density can be further improved by matching with a specific vulcanizing agent auxiliary agent.
In one specific example, the fluorine content of the vinyl fluorosilicone oil is 50% to 70%.
Further, the co-vulcanizing agent is trimethylolpropane trimethacrylate (TMPTMA). Double bonds in trimethylolpropane trimethacrylate (TMPTMA) can better absorb hydrogen fluoride released in the vulcanization process of the fluororubber, so that the synergistic effect among the silicone rubber, the fluororubber and the vinyl fluorosilicone oil is improved, and the oil resistance of the silicone rubber is improved.
In one specific example, the raw methyl vinyl silicone rubber comprises a first raw methyl vinyl silicone rubber and a second raw methyl vinyl silicone rubber; the molecular weight of the first methyl vinyl silicone rubber raw rubber is 50-70 ten thousand, the molar content of vinyl is 0.02-0.05%, the molecular weight of the second methyl vinyl silicone rubber raw rubber is 50-70 ten thousand, and the molar content of vinyl is 0.19-0.25%. Proper gradient can be formed by adopting the raw methyl vinyl silicone rubber with two vinyl molar contents, and the crosslinking density is improved.
In one specific example, the fluororubber is a binary fluororubber with a fluorine content of 60% to 70% and/or a ternary fluororubber with a fluorine content of 60% to 70%.
In one specific example, the structure-controlling agent is at least one of α, ω -dihydroxypolydimethylsiloxane, diphenylsilanediol, hexamethyldisilazane, and dimethyldiethoxysilane.
In one specific example, the reinforcing filler is at least one of precipitated silica and fumed silica, and the specific surface area is 150m2/g～400m2/g。
In one particular example, the vulcanizing agent is a general-purpose vulcanizing agent, such as a peroxide vulcanizing agent. Specifically, the vulcanizing agent is at least one of dibenzoyl peroxide (BPO), 2, 4-dichlorobenzoyl peroxide (DCBP) and tert-butyl peroxybenzoate (TBPB).
In addition, the mold release agent may be of a general kind, such as zinc stearate.
The invention also provides a preparation method of the methyl vinyl silicone rubber, which comprises the following steps:
the methyl vinyl silicone rubber raw rubber, the reinforcing filler, the vinyl fluorosilicone oil, the structure control agent and the release agent are kneaded for the first time, then preheated fluororubber and an auxiliary vulcanizing agent are added, and the mixture is kneaded for the second time to prepare a rubber compound;
mixing the rubber compound with the vulcanizing agent, and then carrying out thin-pass treatment to prepare a rubber compound rubber sheet;
and extruding and vulcanizing the rubber sheet of the rubber compound.
According to the preparation method of the methyl vinyl silicone rubber, preheated fluororubber is added into the kneading machine in the last step of the silicone rubber compound production process, so that the production steps can be simplified, the production efficiency can be improved, and the fluorine loss of the fluororubber in the process processing can be reduced. In one specific example, the preheated fluororubber means that the fluororubber is preheated to a temperature of 70 ℃ to 90 ℃. Further, after the first kneading is finished, the temperature of the materials is reduced to 70-90 ℃, and then the preheated fluororubber is added.
In one specific example, the kneading is performed by kneading for 0.5 to 4 hours, heating to 100 to 200 ℃ and kneading for 0.5 to 4 hours, maintaining the temperature, and continuing the kneading for 0.5 to 4 hours under a vacuum degree of-0.1 to 0.10 MPa.
In one specific example, after the second kneading is completed, the resultant rubber mixture is left to stand for 20 to 30 hours, and then the next step is performed.
In one specific example, the thin pass is performed on an open mill 3 to 5 times, and then the gap between two rollers is adjusted to 0.8 to 1.2mm, and the thin pass is performed 5 to 10 times.
In one specific example, the vulcanization refers to that the extrudate is firstly vulcanized and shaped at the temperature of 400-600 ℃, then is subjected to primary vulcanization at the temperature of 200-300 ℃, and then is subjected to secondary vulcanization at the temperature of 150-250 ℃. It can be understood that the primary vulcanization is usually dynamic vulcanization, for example, the material is vulcanized by passing through a drying tunnel heated to the above temperature, and the time can be reasonably controlled according to the product state; the secondary vulcanization is usually static vulcanization, for example, the material is put into an oven for vulcanization, and the time can be controlled to be 2-6 h.
The following are specific examples, and the raw materials used in the examples are all commercially available products unless otherwise specified.
Example 1
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of raw methyl vinyl silicone rubber (molar fraction of vinyl: 0.03%, average molecular weight: about 65 ten thousand) and 45.5 parts of raw methyl vinyl silicone rubber (molar fraction of vinyl: 0.21%, average molecular weight: about 65 ten thousand) were charged in a kneaderAbout: 68 ten thousand) and 4 parts of α, ω -dihydroxypolydimethylsiloxane (viscosity: 30mpa.s), 30 parts of precipitated silica (specific surface area: 200m2And/g) 4 parts of end vinyl fluorosilicone oil (fluorine content is 70 percent), 0.2 part of zinc stearate, kneading the mixture at normal temperature for 2 hours, kneading the mixture fully and uniformly, kneading the mixture at 170 ℃ and normal pressure for 2 hours, kneading the mixture at 170 ℃ and vacuum degree of-0.08 MPa for 2 hours, cooling the mixture to 80 ℃, adding 30 parts of binary fluororubber preheated to 80 ℃ and 4 parts of TMPTMA, kneading the mixture uniformly to prepare a rubber compound, and standing the rubber compound for 24 hours. And (3) taking the mixed rubber and 2.5 parts of 2, 4-dichloroperoxybenzoyl (bis-di-tetra) to perform thin passing on an open mill for 4 times, adjusting the gap between two rollers to be 1mm, and performing thin passing for 8 times to prepare the rubber sheet of the mixed rubber.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 1. The correlation performance test was performed, and the results are shown in table 1.
Example 2
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.03 percent, the average molecular weight is about 65 ten thousand), 45.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.21 percent, the average molecular weight is about 68 ten thousand) are sequentially added with 4 parts of alpha, omega-dihydroxy polydimethylsiloxane (the viscosity is 30mPa.s), 30 parts of precipitated white carbon black (the specific surface area is 200m2/g),6 parts of vinyl-terminated fluorosilicone oil (the fluorine content is 50 percent) and 0.2 part of zinc stearate, the mixture is kneaded at normal temperature for 2 hours, fully and then kneaded under the conditions of 150 ℃ and normal pressure for 2 hours, then kneaded under the conditions of 170 ℃ and the vacuum degree of-0.08 MPa for 2 hours, cooled to 80 ℃, 30 parts of binary fluorine rubber preheated to 80 ℃ and 4 parts of TMPTMA are added, and the mixture is uniformly kneaded to prepare a rubber compound which is left to stand for 24 hours. And (3) taking 2.5 parts of the rubber compound, thinly passing the rubber compound on an open mill for 5 times, adjusting the gap between two rollers to be 1mm, and thinly passing the rubber compound for 8 times to obtain the rubber sheet of the rubber compound.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 520 ℃, and then vulcanizing the adhesive tape for one time through a section of 220 ℃ drying tunnel. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 2. The correlation performance test was performed, and the results are shown in table 1.
Example 3
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.03 percent, the average molecular weight is about 65 ten thousand), 45.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.21 percent, the average molecular weight is about 68 ten thousand) are sequentially added with 4 parts of alpha, omega-dihydroxy polydimethylsiloxane (the viscosity is 30mPa.s), 30 parts of precipitated white carbon black (the specific surface area is 200m2/g),6 parts of vinyl-terminated fluorosilicone oil (the fluorine content is 70 percent) and 0.2 part of zinc stearate, the mixture is kneaded at normal temperature for 2 hours, fully and then kneaded under the conditions of 170 ℃ and normal pressure for 2 hours, then kneaded under the conditions of 170 ℃ and vacuum degree of-0.08 MPa for 2 hours, cooled to 80 ℃, 30 parts of binary fluorine rubber preheated to 80 ℃ and 6 parts of TMPTMA are added, and the mixture is uniformly kneaded to prepare a rubber compound which is left to stand for 24 hours. And (3) thinly passing 3 parts of the rubber compound on an open mill for 4 times, adjusting the gap between two rollers to 1mm, and thinly passing for 8 times to obtain the rubber compound sheet.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 550 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 230 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 3. The correlation performance test was performed, and the results are shown in table 1.
Example 4
This example is a methyl vinyl silicone rubber, which is prepared as follows:
25 parts of ternary fluororubber (fluorine content 68%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.03 percent, the average molecular weight is about 65 ten thousand), 45.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.21 percent, the average molecular weight is about 68 ten thousand) are sequentially added with 4 parts of alpha, omega-dihydroxy polydimethylsiloxane (the viscosity is 30mPa.s), 30 parts of precipitated white carbon black (the specific surface area is 200m2/g),6 parts of vinyl-terminated fluorosilicone oil (the fluorine content is 70 percent), 0.2 part of zinc stearate, the mixture is kneaded at normal temperature for 2 hours, fully and uniformly kneaded at 170 ℃ and normal pressure for 2 hours, then kneaded at 170 ℃ and the vacuum degree of-0.08 MPa for 2 hours, cooled to 80 ℃, 25 parts of ternary fluorine rubber preheated to 80 ℃ and 6 parts of TMPTMA are added, and the mixture is uniformly kneaded to prepare a rubber compound, and the rubber compound is left for 24 hours. And (3) taking 2.5 parts of the rubber compound, thinly passing the rubber compound on an open mill for 4 times, adjusting the gap between two rollers to be 1mm, and thinly passing the rubber compound for 8 times to obtain the rubber sheet of the rubber compound.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 4. The correlation performance test was performed, and the results are shown in table 1.
Example 5
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of ternary fluororubber (fluorine content 68%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.03 percent, the average molecular weight is about 65 ten thousand), 45.5 parts of methyl vinyl silicone rubber raw rubber (the vinyl molar fraction is 0.21 percent, the average molecular weight is about 68 ten thousand) are sequentially added with 4 parts of alpha, omega-dihydroxy polydimethylsiloxane (the viscosity is 30mPa.s), 30 parts of precipitated white carbon black (the specific surface area is 200m2/g),8 parts of vinyl-terminated fluorosilicone oil (the fluorine content is 70 percent), 0.2 part of zinc stearate, the mixture is kneaded at normal temperature for 2 hours, fully and uniformly kneaded at 170 ℃ and normal pressure for 2 hours, then kneaded at 170 ℃ and the vacuum degree of-0.08 MPa for 2 hours, cooled to 80 ℃, 30 parts of ternary fluorine rubber preheated to 80 ℃ and 6 parts of TMPTMA are added, and the mixture is uniformly kneaded to prepare a rubber compound, and the rubber compound is left for 24 hours. And (3) thinly passing 3 parts of the rubber compound on an open mill for 4 times, adjusting the gap between two rollers to 1mm, and thinly passing for 8 times to obtain the rubber compound sheet.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 520 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 230 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 5. The correlation performance test was performed, and the results are shown in table 1.
Example 6
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of methyl vinyl silicone rubber crude rubber (molar fraction of vinyl: 0.03%, average molecular weight: about 65 ten thousand), 45.5 parts of methyl vinyl silicone rubber crude rubber (molar fraction of vinyl: 0.21%, average molecular weight: about 68 ten thousand) were added to a kneader, followed by 4 parts of α, ω -dihydroxypolydimethylsiloxane (viscosity: 30mpa.s) and 30 parts of precipitated white carbon black (specific surface area: 200 m)2(g)/g), 4 parts of end vinyl fluorosilicone oil (fluorine content is 70 percent), 0.2 part of zinc stearate, kneading for 2 hours at normal temperature, fully and uniformly kneading, then kneading for 2 hours at 170 ℃ and normal pressure, then kneading for 2 hours at 170 ℃ and vacuum degree of-0.08 MPa, cooling to 80 ℃, and adding 30 parts of binary fluorine rubber preheated to 80 DEG CAnd 4 parts of TAIC, kneading uniformly to prepare a rubber compound, and standing for 24 hours. And (3) taking the mixed rubber and 2.5 parts of 2, 4-dichloroperoxybenzoyl, thinly passing the mixed rubber on an open mill for 4 times, adjusting the gap between two rollers to be 1mm, and thinly passing the mixed rubber for 8 times to obtain the mixed rubber sheet.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 6. The correlation performance test was performed, and the results are shown in table 1.
Example 7
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 65 parts of methyl vinyl silicone rubber crude rubber (vinyl molar fraction: 0.11%, average molecular weight: 67 ten thousand) are added into a kneader, 4 parts of alpha, omega-dihydroxy polydimethylsiloxane (viscosity: 30mPa.s) and 30 parts of precipitated silica (specific surface area: 200 m)2And/g) 4 parts of end vinyl fluorosilicone oil (fluorine content is 70 percent), 0.2 part of zinc stearate, kneading the mixture at normal temperature for 2 hours, kneading the mixture fully and uniformly, kneading the mixture at 170 ℃ and normal pressure for 2 hours, kneading the mixture at 170 ℃ and vacuum degree of-0.08 MPa for 2 hours, cooling the mixture to 80 ℃, adding 30 parts of binary fluororubber preheated to 80 ℃ and 4 parts of TMPTMA, kneading the mixture uniformly to prepare a rubber compound, and standing the rubber compound for 24 hours. And (3) taking the mixed rubber and 2.5 parts of 2, 4-dichloroperoxybenzoyl (bis-di-tetra) to perform thin passing on an open mill for 4 times, adjusting the gap between two rollers to be 1mm, and performing thin passing for 8 times to prepare the rubber sheet of the mixed rubber.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 7. The correlation performance test was performed, and the results are shown in table 1.
Comparative example 1
Comparative example 1 is a methyl vinyl silicone rubber with precipitated silica added on the market, and the preparation method is as follows:
30 parts of raw methyl vinyl silicone rubber (molar fraction of vinyl: 0.03%, average molecular weight: about 65 ten thousand), 70 parts of raw methyl vinyl silicone rubber (molar fraction of vinyl: 0.21%, average molecular weight: about 68 ten thousand), 4 parts of alpha, omega-dihydroxy polydimethylsiloxane (viscosity: 30mPa.s) are added into a kneader, the mixture is kneaded uniformly, and 40 parts of precipitated white carbon black (specific surface area: 200 m) are added in portions2And/g) and 0.2 part of zinc stearate, are kneaded for 2 hours at normal temperature, are uniformly and fully kneaded, are kneaded for 2 hours at 170 ℃ and normal pressure, are kneaded for 2 hours at 170 ℃ and vacuum degree of-0.08 MPa to prepare rubber compound, and are left for 24 hours. And (3) taking 1.5 parts of 2, 4-dichloroperoxybenzoyl (bis-di-tetra) from the rubber compound, thinly passing the rubber compound on an open mill for 4 times, adjusting the gap between two rollers to be 1mm, and thinly passing the rubber compound for 8 times to prepare the rubber compound film.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product D1. The correlation performance test was performed, and the results are shown in table 1.
Comparative example 2
This example is a methyl vinyl silicone rubber, which is prepared as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of raw methyl vinyl silicone rubber (molar fraction of vinyl: 0.03%, average molecular weight: about 65 ten thousand), 45.5 parts of raw methyl vinyl silicone rubber (molar fraction of vinyl: 0.21%, average molecular weight: about 68 ten thousand) and 4 parts of alpha, omega-dihydroxy-terminated elastomer were added in this order in a kneaderPolydimethylsiloxane (viscosity: 30 mPas), 30 parts of precipitated silica (specific surface area: 200 m)2And/g) 4 parts of terminal vinyl fluorosilicone oil (fluorine content is 70 percent), 0.2 part of zinc stearate, kneading the mixture at normal temperature for 2 hours, kneading the mixture fully and uniformly, kneading the mixture at 170 ℃ and normal pressure for 2 hours, kneading the mixture at 170 ℃ and vacuum degree of-0.08 MPa for 2 hours, cooling the mixture to 80 ℃, adding 30 parts of binary fluororubber preheated to 80 ℃, kneading the mixture uniformly to prepare rubber compound, and standing the rubber compound for 24 hours. And (3) taking the mixed rubber and 2.5 parts of 2, 4-dichloroperoxybenzoyl (bis-di-tetra) to perform thin passing on an open mill for 4 times, adjusting the gap between two rollers to be 1mm, and performing thin passing for 8 times to prepare the rubber sheet of the mixed rubber.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product D1. The correlation performance test was performed, and the results are shown in table 1.
Comparative example 3
The comparative example is a methyl vinyl silicone rubber, and the preparation method is as follows:
30 parts of binary fluororubber (fluorine content 66%) are preheated in an oven at 80 ℃ for 2 h. 19.5 parts of methyl vinyl silicone rubber crude rubber (molar fraction of vinyl: 0.03%, average molecular weight: about 65 ten thousand), 45.5 parts of methyl vinyl silicone rubber crude rubber (molar fraction of vinyl: 0.21%, average molecular weight: about 68 ten thousand) were added to a kneader, followed by 4 parts of α, ω -dihydroxypolydimethylsiloxane (viscosity: 30mpa.s) and 30 parts of precipitated white carbon black (specific surface area: 200 m)2And/g) 4 parts of methyl fluorosilicone oil (fluorine content is 70 percent), 0.2 part of zinc stearate, kneading the mixture at normal temperature for 2 hours, fully and uniformly kneading the mixture, then kneading the mixture at 170 ℃ and normal pressure for 2 hours, then kneading the mixture at 170 ℃ and vacuum degree of-0.08 MPa for 2 hours, cooling the mixture to 80 ℃, adding 30 parts of binary fluororubber preheated to 80 ℃ and 4 parts of TMPTMA, uniformly kneading the mixture, and preparing the rubber compound, standing the mixture for 24 hours. Taking the mixed rubber, 2.5 parts of 2, 4-dichloro-diphenyl-methaneAnd 4 times of thinly passing benzoyl peroxide (bis-di-tetra) on an open mill, adjusting the gap between two rollers to be 1mm, and thinly passing 8 times to prepare the rubber sheet of the rubber compound.
The rubber sheet of the rubber compound is made into a rubber compound with the diameter of about 4 cm, and the rubber compound is fed into a screw extruder and extruded out through a special die. And (3) vulcanizing and shaping the extruded adhesive tape through a section of ultrahigh-temperature vulcanization shaping drying tunnel with the temperature of 500 ℃, and then vulcanizing the adhesive tape for one time through a section of drying tunnel with the temperature of 200 ℃. And (3) putting the rubber strip subjected to primary vulcanization into an oven at 200 ℃ for 4 hours for secondary vulcanization to obtain an oil-resistant silicone rubber product 7. The correlation performance test was performed, and the results are shown in table 1.
TABLE 1
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The methyl vinyl silicone rubber is characterized by comprising the following raw materials in parts by weight:
the co-vulcanizing agent is at least one of trimethylolpropane trimethacrylate, triallylisocyanurate and ethoxylated trimethylolpropane triacrylate.
2. The methyl vinyl silicone rubber according to claim 1, wherein the vinyl fluorosilicone oil is a terminal vinyl fluorosilicone oil.
3. The methyl vinyl silicone rubber according to claim 1, wherein the fluorine content of the vinyl fluorosilicone oil is 50% to 70%.
4. The methylvinylsiloxane rubber of claim 1, wherein the co-curative is trimethylolpropane trimethacrylate.
5. The methyl vinyl silicone rubber according to any one of claims 1 to 4, wherein the raw methyl vinyl silicone rubber comprises a first raw methyl vinyl silicone rubber and a second raw dimethyl vinyl silicone rubber; the molecular weight of the first methyl vinyl silicone rubber raw rubber is 50-70 ten thousand, the molar content of vinyl is 0.02-0.05%, the molecular weight of the second methyl vinyl silicone rubber raw rubber is 50-70 ten thousand, and the molar content of vinyl is 0.19-0.25%.
6. The methyl vinyl silicone rubber according to any one of claims 1 to 4, wherein the fluororubber is a binary fluororubber having a fluorine content of 60% to 70% and/or a ternary fluororubber having a fluorine content of 60% to 70%.
7. The methyl vinyl silicone rubber according to any one of claims 1 to 4, wherein the structure-controlling agent is at least one of α, ω -dihydroxy polydimethylsiloxane, diphenylsilanediol, hexamethyldisilazane, and dimethyldiethoxysilane.
8. According to claimThe methyl vinyl silicone rubber according to any one of claims 1 to 4, wherein the reinforcing filler is at least one of precipitated silica and fumed silica, and has a specific surface area of 150m2/g～400m2/g。
9. The method for preparing methyl vinyl silicone rubber according to any one of claims 1 to 8, characterized by comprising the steps of:
kneading the methyl vinyl silicone rubber crude rubber, the reinforcing filler, the vinyl fluorosilicone oil, the structure control agent and the release agent, then adding the preheated fluororubber and the auxiliary vulcanizing agent, and kneading to prepare a rubber compound;
mixing the rubber compound with the vulcanizing agent, and then carrying out thin-pass treatment to prepare a rubber compound rubber sheet;
and extruding and vulcanizing the rubber sheet of the rubber compound.
10. The method for preparing methyl vinyl silicone rubber according to claim 9, wherein the kneading is performed by first kneading for 0.5 to 4 hours, then heating to 100 to 200 ℃ and kneading for 0.5 to 4 hours, then maintaining the temperature, and continuing kneading for 0.5 to 4 hours under a vacuum degree of-0.1 to 0.1 MPa; and/or
The vulcanization refers to the steps of carrying out vulcanization shaping on the extrudate at the temperature of 400-600 ℃, then carrying out primary vulcanization at the temperature of 200-300 ℃, and then carrying out secondary vulcanization at the temperature of 150-250 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115232476A (en) * | 2022-07-11 | 2022-10-25 | 浙江葆润应用材料有限公司 | Material for liquid cooling pipe sleeve and preparation method and application thereof |
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| CN108059830A (en) * | 2017-11-25 | 2018-05-22 | 天长市荣盛有机硅科技有限公司 | A kind of digital keys methyl vinyl silicone rubber |
| CN110172251A (en) * | 2019-06-11 | 2019-08-27 | 东莞市南炬高分子材料有限公司 | A kind of resistance oil silicone rubber and preparation method thereof |
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