CN103122147B - Room temperature vulcanization two-component silicone sealant used in nuclear power station and preparation process thereof - Google Patents
Room temperature vulcanization two-component silicone sealant used in nuclear power station and preparation process thereof Download PDFInfo
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Abstract
The invention discloses a room temperature vulcanization two-component silicone sealant used in a nuclear power station and a preparation process thereof. The two-component silicone sealant comprises a component A and a component B, wherein the component A comprises 450 to 620 weight parts of vinyl silicone oil with the viscosity of 1,000 to 10,000mPa.s, 20 to 50 weight parts of vinyl phenyl silicone oil with the viscosity of 200 to 2,000mPa.s, 400 to 500 weight parts of 300 to 1,000-mesh quartz sand, 0.5 to 2 weight parts of carbon black and 0.3 to 1 weight part of Pt catalyst; the component B comprises 400 to 500 weight parts of vinyl silicone oil with the viscosity of 1,000 to 10,000mPa.s, 400 to 500 weight parts of 300 to 1,000-mesh quartz sand, 50 to 80 hydrogen-containing silicone oil containing 1.0 to 1.5 percent hydrogen, 5 to 20 hydrogen-containing silicone oil containing 0.2 percent hydrogen and 0 to 0.1 weight part of inhibitor; and during use, the component A and the component B in a mass ratio of 1:0.9-1.1 are mixed for use. The preparation process is simple and practical; and tests prove that various kinds of performance such as fireproof performance and irradiation-resisting performance of the two-component silicone sealant meets using standards of the nuclear power station.
Description
Technical field
The present invention relates to a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants and preparation technology thereof.
Background technology
Organosilicon macromolecule material has the performance of many uniquenesses, as high-low temperature resistant, weather-proof, ageing-resistant, electric insulation, resistance to ozone, hydrophobic, difficult combustion etc., for other organic polymer material can not compare and substitute.All be widely used in aerospace, electric, light industry, chemical industry, weaving, machinery, building, agricultural, communications and transportation, health care, daily life etc., and become novel high polymer material important in national economy.
Along with developing rapidly of nuclear industry technology, under the environment that some are special, as nuclear reactor center or near, the product such as gasket materials, sealing material of use is proposed the requirement of radiation resistance.Under energetic ray effect, can produce macromole chain rupture or crosslinking reaction etc. cause a series of structural change, its version and intensity of variation depend on the chemical constitution of material, molecular structure and medium, and these changes change some performance of material, affect the use of product.
But the silicone rubber used at present, substantially for the field such as building, does not possess strong anti-radiation performance.Therefore, prepare the construction of organosilicon sealing material to Nuclear power plants with good radiation resistance and there is important practical significance.
Summary of the invention
Technical problem to be solved by this invention is the needs according to the sealing of Nuclear power plants pipeline, provides a kind of and meets Room temperature vulcanization two-component silicone sealant and the preparation technology thereof that Nuclear power plants uses standard.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
For a Room temperature vulcanization two-component silicone sealant for Nuclear power plants, comprise component A, B component, described component A by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000 mPa.s: 450 ~ 620 parts;
The vinyl phenyl silicone oil of viscosity 200 ~ 2000 mPa.s: 20 ~ 50 parts;
300 ~ 1000 object quartz sands: 400 ~ 500 parts;
Carbon black: 0.5 ~ 2 part;
Pt catalyzer: 0.3 ~ 1 part;
Described B component by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000mPa.s: 400 ~ 500 parts;
300 ~ 1000 object quartz sands: 400 ~ 500 parts;
The containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%: 50 ~ 80 parts;
The containing hydrogen silicone oil of hydrogeneous 0.2%: 5 ~ 20 parts;
Inhibitor: 0 ~ 0.1 part;
During use, 1:0.9 ~ 1.1 are used in combination in mass ratio for component A, B component.
Wherein, vinyl silicone oil is middle segment or the two ends abbreviation with the linear polydimethylsiloxane of vinyl, formal name used at school Polymethyl methacrylate; Vinyl phenyl silicone oil and phenyl-vinyl silicon oil; Quartz sand is a kind of nonmetallic mineral, and be a kind of silicate minerals of hard, wear-resisting, stable chemical performance, its main mineral constituent is SiO
2, the color of quartz sand is oyster white or semi-transparent clear shape, hardness 7; Carbon black is hydro carbons under the strict processing condition controlled through the black powder material of gas phase incomplete combustion or pyrolysis, its composition mainly elemental carbon.
Said components is preferred, and component A by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000 mPa.s: 500 ~ 570 parts;
The vinyl phenyl silicone oil of viscosity 200 ~ 2000 mPa.s: 25 ~ 40 parts;
300 ~ 1000 object quartz sands: 410 ~ 460 parts;
Carbon black: 1.2 ~ 2 parts;
Pt catalyzer: 0.3 ~ 0.8 part;
Described B component by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000: 460 ~ 490 parts;
300 ~ 1000 object quartz sands: 440 ~ 480 parts;
The containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%: 55 ~ 70 parts;
The containing hydrogen silicone oil of hydrogeneous 0.2%: 8 ~ 15 parts;
Methylbutynol: 0.005 ~ 0.06 part.
As said components further preferably, in component A, vinyl silicone oil viscosity is 1000 ~ 5000 mPa.s, and vinyl phenyl silicone oil viscosity is 400 ~ 1000 mPa.s, and in B component, vinyl silicone oil viscosity is 1000 ~ 5000 mPa.s.
In preferred plan of the present invention, described component A by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 5000 mPa.s: 530 parts;
The vinyl phenyl silicone oil of viscosity 400 ~ 1000 mPa.s: 30 parts;
300 ~ 1000 object quartz sands: 437.5 parts;
Carbon black: 2 parts;
Pt catalyzer: 0.5 part;
Described B component by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 5000: 470 parts;
300 ~ 1000 object quartz sands: 460 parts;
The containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%: 60 parts;
The containing hydrogen silicone oil of hydrogeneous 0.2%: 10 parts;
Methylbutynol: 0.01 ~ 0.02 part;
During use, component A, B component mass ratio are: 1:1.
A preparation technology for the Room temperature vulcanization two-component silicone sealant for Nuclear power plants described in above-mentioned any one, comprises the steps:
The preparation of component A:
(1) by metering, vinyl silicone oil, vinyl phenyl silicone oil are joined in reaction flask, at the temperature of 10 ~ 50 ° of C, stir 10min make it mix completely;
(2) in step (1) gained mixed solution, add quartz sand, be uniformly mixed 60min;
(3) in step (2) gained solution, add Pt catalyzer, carbon black, be uniformly mixed;
(4) by the degassed 30 ~ 60min of step (3) gained solution for vacuum;
(5) by step (4) gained solution 100 object filtering net pressure filters, fillingly namely component A is obtained;
The preparation of B component:
A vinyl silicone oil, the containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%, the containing hydrogen silicone oil of hydrogeneous 0.2% join in reaction flask by metering by (), stir 10min and make it be mixed to get mixing solutions completely at the temperature of 10 ~ 50 ° of C;
B () adds quartz sand, inhibitor in step (a) gained mixing solutions, be uniformly mixed 60min;
C () is by the degassed 30 ~ 60min of step (b) gained solution for vacuum;
D namely (), by step (c) gained solution 100 object filtering net pressure filters, fillingly obtain B component.
In described step (1), the viscosity of mixing solutions is 1000 ~ 2500 mPa.s.
In described step (2), the viscosity of solution is 2500 ~ 5500 mPa.s, and keeps solution temperature in reaction flask to be 10 ~ 50 ° of C.
In described step (a), the viscosity of mixing solutions is 1000 ~ 2500 mPa.s.
In described step (b), the viscosity of solution is 2500 ~ 5500 mPa.s, and keeps solution temperature in reaction flask to be 10 ~ 50 ° of C.
Described inhibitor is methylbutynol.Inhibitor is also called retarder, and be retardance or the material reducing chemical reaction velocity, act on identical with negative contact agent, it can not stop polyreaction, just slows down polyreaction, so as to suppressing or relax the material of chemical reaction.Kind is a lot, as the negative contact agent of catalyzed reaction, and the stopper of macromolecular compound, the oxidation inhibitor of plastics, rubber, grease etc., froth suppressor, the knock-compound of gasoline, etch-proof buffer reagent etc.Inhibitor of the present invention is methylbutynol; Also the alkynol class inhibitor that other physico-chemical properties are close can be adopted, as acetylene hexalin etc., or other class silicon rubber inhibitor used.
The organosilicon material (vinyl silicone oil) that the present invention selects has unique Si-O major key, compared with other organic materials, has excellent high-and low-temperature resistance performance, the features such as good electric property.For the silicon rubber containing phenylene group, containing penylene chain link in its molecular chain, owing to introducing aromatic structure in silicon rubber macromole, its structural singularity, determine material, to energetic ray, also there is excellent radiation resistance, can be used in the fields such as aerospace industry, nuclear industry and nuclear reactor, the present invention selects vinyl phenyl silicone oil.
Compared with prior art, the two component silicone sealant of high-density self cure of the present invention has the utilisation technology effect of following advantage and essence:
1, the two component silicone sealant of high-density self cure provided by the invention has excellent radiation hardness effect, meets Nuclear power plants and uses standard.
2, the two component silicone sealant product preparation process of high-density self cure provided by the invention is simple, and reaction conditions has no special requirements, and preparation time is shorter; After tested, the various performances such as sealing glue fire prevention, radiation hardness, sealing property, intensity reach the requirement of relevant criterion to this series products.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention does not limit by embodiment.
The Room temperature vulcanization two-component silicone sealant for Nuclear power plants of the present embodiment comprises component A, B component, wherein component A, B component by weight each component specifically form as shown in table 1.
The proportioning of component A, B component in table 1 the present embodiment
Under the component proportion of above-mentioned table 1, each component for the present embodiment is studied:
(1) vinyl silicone oil selected by the base glue of Room temperature vulcanization two-component silicone sealant that prepared by the present embodiment, and its molecular structure is:
Vinyl silicone oil molecular structure is basically identical, and the key distinction is molecular weight (i.e. viscosity).The base mateiral of different viscosity is to product performance, and the viscosity particularly before solidification has important impact.In order to the viscosity keeping product suitable, we screen a series of vinyl silicone oil, by great many of experiments and research, the present embodiment finally determines that component A adopts viscosity to be 1000 ~ 5000 mPa.s, consumption is 500 ~ 570 parts of vinyl silicone oils, B component adopts viscosity to be 1000 ~ 5000 mPa.s, consumption is 460 ~ 490 parts of vinyl silicone oils, vinyl silicone oil adopts proportioning of the present invention and viscosity parameter, determine other ingredient names mated and physical and chemical parameter simultaneously, consumption, above-mentioned each component is adopted to match, finally prepd seal gum just can reach the radioprotective parameter request of Nuclear power plants.
(2) filler Room temperature vulcanization two-component silicone sealant needs to use filler, and conventional filler has: thermal silica, precipitated silica, calcium carbonate, titanium dioxide, carbon black, MQ silicone resin etc.In the present invention, we select quartz sand as filler, and have carried out testing comparing to thermal silica and quartz sand.
Thermal silica has certain strengthening action to the product after solidification, but when addition is more, too obvious to the product thickening power before solidification, have impact on the use properties of product, particularly too high viscosity can reduce the sealing property of product.Quartz sand is less than white carbon black as during filler to the strengthening action of the product after solidification, but its thickening power is well below white carbon black, therefore we use quartz sand to do filler, adopt the vinyl silicone oil that molecular weight is relatively high as base glue simultaneously, improve the intensity of the rear sealing prod of solidification.The present invention compares by experiment, and the optimum size determining quartz sand in room temperature vulcanization organosilicon foam is 300 ~ 1000 orders, and consumption is 410 ~ 460 parts.
(3) containing hydrogen silicone oil
Containing hydrogen silicone oil can be the containing hydrogen silicone oil of straight chain, it can be the containing hydrogen silicone oil of ring-type, we compare the Methyl Hydrogen Polysiloxane Fluid of hydrogen richness 0.2 to 1.5, determine best hydrogen content, and hydrogen content described here refers to the active hydrogen massfraction in containing hydrogen silicone oil.
Found through experiments, the contents of ethylene in vinyl silicone oil is identical, silica powder consumption identical time, along with the increase of active hydrogen massfraction in containing hydrogen silicone oil, the tensile strength of silicon rubber first increases and subtracts afterwards, and elongation constantly declines.This is due to the raising along with active hydrogen massfraction, and the cross-linking density of silicon rubber improves, and this contributes to dispersive stress; And the further raising of active hydrogen massfraction causes the decline of the molecule segment length between silicone rubber crosslinking point, make the molecular chain strength degradation between cross-linking set, so the tensile strength of silicon rubber and tear strength also decline.Silicon rubber elongation at break constantly declines is increase due to the cross-linking density along with silicon rubber, and the molecular chain between cross-linking set can not cause by ordered arrangement.Found by further experiment, adopt the containing hydrogen silicone oil 55 ~ 70 parts of hydrogeneous 1.0 ~ 1.5% and the containing hydrogen silicone oil 8 ~ 15 parts of hydrogeneous 0.2% with the use of, the performance of the Room temperature vulcanization two-component silicone sealant of preparation is had a distinct increment.
(4) curing mechanism of catalyzer Room temperature vulcanization two-component silicone sealant is hydrosilation reaction, and the catalyzer of hydrosilation reaction all can use in principle.But because the sealing material product of the present invention's description is to the particular requirement of element, therefore the Platinic chloride complex compound that activity is higher, can be dissolved in organopolysiloxane is adopted, alkene complex as Platinic chloride: double-seal head Pt complex compound, this catalyst activity is high, experiment finds, has good catalytic effect when adopting Pt catalyst levels to be 0.3 ~ 0.8 part.
(5) inhibitor is in order to regulate vulcanization rate and extend using period, and can use reaction suppressor to suppress hydrosilation reaction during solidification.The present invention, by a series of experiment, adopts the alkynol compound good with sizing material consistency to be inhibitor.Systematic study is carried out to the consumption of inhibitor simultaneously, finally determined to adopt methylbutynol 0.005 ~ 0.06 part ideal as its effect of inhibitor.It is pointed out that the addition of inhibitor can adjust according to construction requirement completely, to adapt to the different requirements of site operation to set time.
(6) impact of radiation dose
Macromolecular material is under x radiation x condition, and crosslinked and DeR occurs simultaneously, if to be cross-linked, generates three-dimensional network polymer; If to be degraded to master, breaking polymer chains, molecular weight is caused to reduce.In general, when low dose radiation, based on crosslinking reaction, when radiation dose increases, turn to based on DeR.During material generation radiation degradation, its structure and composition are damaged, and the mechanical property of material worsens, and finally make the function of expection reduce.Common dimethyl silicone rubber is standing 12.9 ~ 15.48 × 10
3c/ kg (5 ~ 6 × 10
7human relations) namely can follow the string after irradiation, the radioresistance of the special methyl vinyl silicone rubber coordinated approximately also can only reach 2.58 × 10
4c/ kg (1 × 10
8human relations) left and right.The radiation-resistant property improving silicon rubber must be managed for this reason, the present invention has selected the silicone oil containing aromatic nucleus with very high radiation-resistant property, this is because containing conjugated double bond in huge aromatic nucleus, can absorbed radiation energy, make material stable under radiation environment.Accordingly, in silicon rubber molecule, suitably introduce phenyl be expected the radiation-resistant property improving silastic material, the present invention is in order to improve the anti-radiation performance of Room temperature vulcanization two-component silicone sealant, in formula, employ a certain amount of vinylsiloxane rubber (i.e. vinyl phenyl silicone oil) containing phenyl, its molecular structural formula is as follows:
Experiment finds, vinyl phenyl silicone oil viscosity is 200 ~ 2000 mPa.s, and when consumption is 25 ~ 40 parts, the silicone sealant radiation hardness effect of preparation is ideal.
In the present embodiment, the preparation technology of the Room temperature vulcanization two-component silicone sealant for Nuclear power plants described in table 1, comprises the steps:
The preparation of component A:
(1) join in reaction flask by metering by vinyl silicone oil, vinyl phenyl silicone oil, at the temperature of 10 ~ 50 ° of C, stir 10min make it mix completely, the viscosity controller of mixed solution is 1000 ~ 2500 mPa.s;
(2) in step (1) gained mixed solution, add 300 ~ 1000 object quartz sands, be uniformly mixed 60min, in this step, the viscosity controller of mixed solution is 2500 ~ 5500 mPa.s, and keeps solution temperature in reaction flask to be 10 ~ 50 ° of C;
(3) in step (2) gained mixed solution, add Pt catalyzer, carbon black as auxiliary agent, be uniformly mixed;
(4) by step (3) gained mixed solution vacuum outgas 30 ~ 60min;
(5) by step (4) gained mixed solution 100 object filtering net pressure filters, fillingly namely component A is obtained;
The preparation of B component:
A vinyl silicone oil, the containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%, the containing hydrogen silicone oil of hydrogeneous 0.2% join in reaction flask by metering by (), at the temperature of 10 ~ 50 ° of C, stir 10min under certain temperature makes it be mixed to get mixing solutions completely, and the viscosity controller of mixed solution is 1000 ~ 2500 mPa.s;
B () adds 300 ~ 1000 object quartz sands, inhibitor in step (a) gained mixing solutions, 60min is uniformly mixed with high-speed emulsifying machine, in this step, the viscosity controller of solution is 2500 ~ 5500 mPa.s, and keeps solution temperature in reaction flask to be 10 ~ 50 ° of C;
C () is by the degassed 30 ~ 60min of step (b) gained solution for vacuum;
D namely (), by step (c) gained solution 100 object filtering net pressure filters, fillingly obtain B component.
According to said ratio and preparation technology, by the Room temperature vulcanization two-component silicone sealant prepared by table 1 proportioning, there is radiation resistance described in table 2 and other physicochemical property parameters.Be 1000 ~ 10000 mPa.s at each component proportion medium vinyl silicon oil viscosity of table 1, vinyl phenyl silicone oil viscosity is 200 ~ 2000 mPa.s, in B component, vinyl silicone oil viscosity is 1000 ~ 10000 mPa.s, in above-mentioned range of viscosities, the two component silicone sealant of prepared high-density self cure all can meet the radiotolerant requirement of Nuclear power plants.Be 1000 ~ 5000 mPa.s in vinyl silicone oil viscosity, vinyl phenyl silicone oil viscosity is 400 ~ 1000 mPa.s, and in B component, vinyl silicone oil viscosity is 1000 ~ 5000 mPa.s, the now preparation fire prevention room temperature vulcanization organosilicon of resistance to irradiation foaming properties is better, and radiation-resistant property significantly improves.
The detection method of each parameter in table 2, the test basis of radiation-resistant property: with reference to the requirement of the program B in " Technical specification-10.21(B.T.S-10.21) other shutoff and special fire prevention " annex E4 and EJ/T1111-2000 " test method of compressed water reactor nuclear power station-service coating lacquer film gamma-ray irradiation impact ".Irradiation test is carried out according to test basis, as through 5 × 10 by the Room temperature vulcanization two-component silicone sealant sample prepared by table 1 proportioning
5there is not the phenomenons such as dimensional contraction, stripping, crackle, swelling, foaming, efflorescence in Gy integral dose after irradiating, color and luster is unchanged, mechanical property also has no considerable change, after pre-irradiation, the sealing property of test specimen all meets the demands, then the radiation-resistant property of this product meets the related request specified in test basis; Otherwise radiation-resistant property then belongs to the related request not meeting and specify in test basis.
Thermal conductivity test basis: the standard according to GB/T10295-2008 detects, detects the thermal conductivity of sample under the condition of medial temperature 20 DEG C.
The performance perameter of table 2 Room temperature vulcanization two-component silicone sealant
According to the detected result of table 2, Room temperature vulcanization two-component silicone sealant product provided by the invention has excellent radiation hardness effect; And other physical and chemical parameters all can reach the requirement of relevant criterion to this series products, and suitable with same kind of products at abroad performance; The particularly component of sequence number 1, Room temperature vulcanization two-component silicone sealant prepared according to the methods of the invention, carrying out irradiation test according to 1.2 times of " test method of compressed water reactor nuclear power station-service coating lacquer film gamma-ray irradiation impact " middle irradiation during use, its radiation-resistant property still meets the demands.The silicone sealant material of the present invention's development meets Nuclear power plants and uses standard, applies further to this product, has great importance to the construction of nuclear power station of promotion China.
According to above-described embodiment, just the present invention can be realized well.Above-described embodiment is only most preferred embodiment of the present invention, but embodiments of the present invention are not limited in this.
Claims (10)
1. for a Room temperature vulcanization two-component silicone sealant for Nuclear power plants, it is characterized in that, comprise component A, B component, described component A by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000 mPa.s: 450 ~ 620 parts;
The vinyl phenyl silicone oil of viscosity 200 ~ 2000 mPa.s: 20 ~ 50 parts;
300 ~ 1000 object quartz sands: 400 ~ 500 parts;
Carbon black: 0.5 ~ 2 part;
Pt catalyzer: 0.3 ~ 1 part;
Described B component by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000mPa.s: 400 ~ 500 parts;
300 ~ 1000 object quartz sands: 400 ~ 500 parts;
The containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%: 50 ~ 80 parts;
The containing hydrogen silicone oil of hydrogeneous 0.2%: 5 ~ 20 parts;
Inhibitor: 0 ~ 0.1 part;
During use, 1:0.9 ~ 1.1 are used in combination in mass ratio for component A, B component.
2. a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 1, is characterized in that, described component A by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000 mPa.s: 500 ~ 570 parts;
The vinyl phenyl silicone oil of viscosity 200 ~ 2000 mPa.s: 25 ~ 40 parts;
300 ~ 1000 object quartz sands: 410 ~ 460 parts;
Carbon black: 1.2 ~ 2 parts;
Pt catalyzer: 0.3 ~ 0.8 part;
Described B component by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 10000: 460 ~ 490 parts;
300 ~ 1000 object quartz sands: 440 ~ 480 parts;
The containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%: 55 ~ 70 parts;
The containing hydrogen silicone oil of hydrogeneous 0.2%: 8 ~ 15 parts;
Methylbutynol: 0.005 ~ 0.06 part.
3. a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 1, it is characterized in that, in described component A, vinyl silicone oil viscosity is 1000 ~ 5000 mPa.s, vinyl phenyl silicone oil viscosity is 400 ~ 1000 mPa.s, in B component, vinyl silicone oil viscosity is 1000 ~ 5000 mPa.s.
4. a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 2, is characterized in that, described component A by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 5000 mPa.s: 530 parts;
The vinyl phenyl silicone oil of viscosity 400 ~ 1000 mPa.s: 30 parts;
300 ~ 1000 object quartz sands: 437.5 parts;
Carbon black: 2 parts;
Pt catalyzer: 0.5 part;
Described B component by weight each component is configured to:
The vinyl silicone oil of viscosity 1000 ~ 5000: 470 parts;
300 ~ 1000 object quartz sands: 460 parts;
The containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%: 60 parts;
The containing hydrogen silicone oil of hydrogeneous 0.2%: 10 parts;
Methylbutynol: 0.01 ~ 0.02 part;
During use, component A, B component mass ratio are: 1:1.
5. the preparation technology of a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants described in Claims 1-4 any one, is characterized in that, comprise the steps:
The preparation of component A:
(1) by metering, vinyl silicone oil, vinyl phenyl silicone oil are joined in reaction flask, at the temperature of 10 ~ 50 ° of C, stir 10min make it mix completely;
(2) in step (1) gained mixed solution, add quartz sand, be uniformly mixed 60min;
(3) in step (2) gained solution, add Pt catalyzer, carbon black, be uniformly mixed;
(4) by the degassed 30 ~ 60min of step (3) gained solution for vacuum;
(5) by step (4) gained solution 100 object filtering net pressure filters, fillingly namely component A is obtained;
The preparation of B component:
A vinyl silicone oil, the containing hydrogen silicone oil of hydrogeneous 1.0 ~ 1.5%, the containing hydrogen silicone oil of hydrogeneous 0.2% join in reaction flask by metering by (), stir 10min and make it be mixed to get mixing solutions completely at the temperature of 10 ~ 50 ° of C;
B () adds quartz sand, inhibitor in step (a) gained mixing solutions, be uniformly mixed 60min;
C () is by the degassed 30 ~ 60min of step (b) gained solution for vacuum;
D namely (), by step (c) gained solution 100 object filtering net pressure filters, fillingly obtain B component.
6. the preparation technology of a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 5, is characterized in that, in described step (1), the viscosity of mixing solutions is 1000 ~ 2500 mPa.s.
7. the preparation technology of a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 5, it is characterized in that, in described step (2), the viscosity of solution is 2500 ~ 5500 mPa.s, and keeps solution temperature in reaction flask to be 10 ~ 50 ° of C.
8. the preparation technology of a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 5, is characterized in that, in described step (a), the viscosity of mixing solutions is 1000 ~ 2500 mPa.s.
9. the preparation technology of a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 5, it is characterized in that, in described step (b), the viscosity of solution is 2500 ~ 5500 mPa.s, and keeps solution temperature in reaction flask to be 10 ~ 50 ° of C.
10. the preparation technology of a kind of Room temperature vulcanization two-component silicone sealant for Nuclear power plants according to claim 5, is characterized in that, described inhibitor is methylbutynol.
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| CN112679959A (en) * | 2020-12-25 | 2021-04-20 | 浙江中特化工有限公司 | Transparent bi-component flame-retardant liquid silicone rubber filling material and preparation method thereof |
| CN116254002B (en) * | 2023-02-23 | 2023-12-19 | 深圳市森日有机硅材料股份有限公司 | Liquid silicone rubber composition for coating air bags and preparation method thereof |
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