CN102408722B - Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof - Google Patents
Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof Download PDFInfo
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- CN102408722B CN102408722B CN 201110303287 CN201110303287A CN102408722B CN 102408722 B CN102408722 B CN 102408722B CN 201110303287 CN201110303287 CN 201110303287 CN 201110303287 A CN201110303287 A CN 201110303287A CN 102408722 B CN102408722 B CN 102408722B
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Abstract
Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof, wherein component A itself is single-component dealcoholization type silicon rubber and can offer a final strength value equal to the mixture of component A and component B, and has a good storage stability. The component B contains water, wherein the water can be directly added in free-state way and carried on the filler material; the component B also contains reactive polymer which can be activated by contacting with the catalyst of the component A, and perform quick cross-linking reaction with the cross-linking agent in the component A at the same time, the advantages of the invention are as follows: on one hand, the invention solves the shortcoming that the single-component silicon rubber has bigger reliance on the temperature and humidity of the environment; on the other hand, the invention accelerates the curing and reduces sensibility of the bi-component system to the mix error and measurement error at the same time. The ratios of the component A and component B in the bi-component system can vary in a large range without producing adverse effect to the final strength.
Description
Technical field
The present invention relates to a kind of Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof, the component A of this two-pack dealcoholized silicone rubber self moisture absorption fully solidifies, and the introducing of B component simultaneously can also be accelerated to solidify.This novel two-component silicone rubber has solved the single-component silicon rubber shortcoming larger to the ambient temperature and humidity dependency on the one hand, has also reduced the susceptibility of bicomponent system to mixing errors and error in dipping on the other hand when acceleration is curing.This two-component silicone rubber can be widely used in bonding, the embedding of various electronics, electric elements, can play the provide protections such as protection against the tide, anticorrosion, insulation, is particularly suitable for requiring fast and the embedding of deep layer vulcanization parts and bonding.
Background technology
Room temperature vulcanized silicone rubber (be called for short RTV) is that not need heating be at room temperature a vulcanizable class silicon rubber, since coming out the sixties, development rapidly, be widely used in the industries such as electronics, electric, automobile and building, the rise of photovoltaic industry in recent years, for the development of RTV silicon rubber has brought new opportunity.RTV silicon rubber can be divided into two types of single component and two-packs by packaging means.
Single-component RTV silicon rubber is generally user institute preferably due to easy to use, because do not have mixing errors while using and error in dipping occurs.Yet the curing of single-component RTV silicon rubber is from outward appearance to inner essence, very difficult fully curing when curing depth is greater than certain thickness, relatively slow solidification rate causes its use seriously to be limited.Another shortcoming of single-component RTV silicon rubber is that their solidification rate is very large to the dependency of weather, the solidification rate that is to say them not only depends on surrounding temperature, and the atmospheric moisture around depending on to a greater extent, particularly in month in the winter time, atmospheric moisture is very low, so deep layer is solidified very slow.
The great advantage of two component RTV silicon rubber is exactly can deep layer vulcanization, conventional two-component adhesive system is that base glue and linking agent, catalyzer etc. are separated to packing, by a certain percentage they are mixed and use before use, the shortcoming of this system is that they are very sensitive to mixing errors, therefore only have when two kinds of components are fully mixed with correct stoichiometric ratio, just can obtain desirable solidifying and performance.
Summary of the invention
The object of the present invention is to provide a kind of novel bicomponent system, allow mixing errors and error in dipping while using, solve the problem of two components to mixing errors and error in dipping susceptibility, this pair of Component System can in very large range change the ratio between component A and B component, and can not have a negative impact to final strength.
in order to realize purpose of the present invention, proposea kind of Novel bi-component dealcoholization type silicon rubber sealant, this silicone rubber sealant comprises following A, two components of B:
Component A comprises following component:
A
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, its molecular structural formula is
hO[(CH3) 2 siO] n h, n=300～1500;
A
2. dimethyl silicone oil 10-30 part, its molecular structural formula is
(CH 3 ) 3 siO[(CH3) 2 siO] n si (CH 3 ) 3 , n=50～230;
A
3. dealcoholizing-type linking agent 3-8 part
A
4. silane coupling agent 1-5 part
A
5. reinforced filling 10-100 part
A
6. catalyzer 0.1-0.6 part
B component comprises following component:
B
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, its molecular structural formula is
hO[(CH3) 2 siO] n h, n=300～1500;
B
2. tensio-active agent 1-2 part, select polyoxyethylene nonylphenol ether;
B
3.deionized water 8-15 part, chemical formula is H
2o;
B
4. reinforced filling 10-100 part, the combination of selecting in gas-phase silica and light calcium carbonate at least one or several fillers;
Wherein, the volumetric mixture ratio of A, B be 20:1 to 2:1, wherein preferably 4:1 mixes.
Described A
3the dealcoholizing-type linking agent, select in methyltrimethoxy silane, vinyltrimethoxy silane, tetraethoxy and its partial hydrolystate at least one or several combinations;
Described A
4silane coupling agent, select in γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane and γ-urea propyl trimethoxy silicane at least one or several combinations;
Described A
5reinforced filling, the combination of selecting at least one or two fillers in gas-phase silica and light calcium carbonate;
Described A
6the moisture-curable catalyzer, select at least one in dibutyl tin laurate, two lauric acid dioctyl tins, stannous octoate, tetrabutyl titanate ester, four isobutyl-titanic acid ester and tetra isopropyl titanate;
Described B
1α, alpha, omega-dihydroxy polydimethyl siloxane viscosity in the time of 25 ℃ is 1000-50000mpa.s, preferred viscosities is 3000mpa.s;
Described B
4the gas-phase silica surface is through dimethyldichlorosilane(DMCS) or hexamethyldisilazane modification, and light calcium carbonate is processed through lipid acid, sylvic acid surface-modifying agent.
The present invention also proposes the preparation method of described Novel bi-component dealcoholization type silicon rubber sealant, and this silicone rubber sealant is comprised of A, two components of B, and A, B two component volume ratios are from 20:1 to 2:1, and wherein preferably 4:1 mixes;
The preparation method of component A is: by the A of certain proportioning
1, A
2in vacuum tightness-0.095～-mix de-bubbled, N under the condition of 0.1MPa
2add successively A under protection
3component, A
4component, A
5component and A
6component, add all in vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa, finally can make the component A of similar single-component de-alcoholized silicon rubber; at every turn
The preparation method of B component is: by the B of certain proportioning
1, B
2in vacuum tightness-0.095～-mix de-bubbled, N under the condition of 0.1MPa
2add successively B under protection
3, B
4component, add all in vacuum tightness-0.095～-stir 20min under 0.1MPa condition, finally can make B component; at every turn
Wherein,
A
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes
;
A
2. dimethyl silicone oil 10-30 part
;
A
3. dealcoholizing-type linking agent 3-8 part
A
4. silane coupling agent 1-5 part
A
5. reinforced filling 10-100 part
A
6. catalyzer 0.1-0.6 part
B
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes
;
B
2. tensio-active agent 1-2 part, select polyoxyethylene nonylphenol ether;
B
3.deionized water 8-15 part;
B
4. reinforced filling 10-100 part, the combination of selecting in gas-phase silica and light calcium carbonate at least one or several fillers.
Described A
3the dealcoholizing-type linking agent, select in methyltrimethoxy silane, vinyltrimethoxy silane, tetraethoxy and its partial hydrolystate at least one or several combinations;
Described A
4silane coupling agent, select in γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane and γ-urea propyl trimethoxy silicane at least one or several combinations;
Described A
5reinforced filling, the combination of selecting at least one or two fillers in gas-phase silica and light calcium carbonate;
Described A
6the moisture-curable catalyzer, select at least one in dibutyl tin laurate, two lauric acid dioctyl tins, stannous octoate, tetrabutyl titanate ester, four isobutyl-titanic acid ester and tetra isopropyl titanate;
Described B
1α, alpha, omega-dihydroxy polydimethyl siloxane viscosity in the time of 25 ℃ is 1000-50000mpa.s, preferred viscosities is 3000mpa.s;
Described B
4the gas-phase silica surface is through dimethyldichlorosilane(DMCS) or hexamethyldisilazane modification, and light calcium carbonate is processed through lipid acid, sylvic acid surface-modifying agent.
Described component A can also adopt following concrete steps to make: the α that is 20000mpa.s by 25 ℃ of lower viscositys, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 20 parts of the dimethyl silicone oils that viscosity is 500mpa.s, in vacuum tightness-0.095～-mix de-bubbled under the condition of 0.1MPa.Add 4 parts of vinyltrimethoxy silanes under nitrogen protection, then in vacuum tightness-0.095～-stirring 20min under the condition of 0.1MPa carries out end capping, add again the partial hydrolystate of 4 parts of tetraethoxys under nitrogen protection, vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa; The mixture that adds 2 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and 2 parts of γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicanes under nitrogen protection, vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa; The light calcium carbonate that adds successively 5 parts of thermal silicas and 50 parts under the nitrogen protection condition, vacuum tightness-0.095～-stirred, disperseed under the condition of 0.1MPa until to evenly without particle; Add the dibutyl tin laurate of 0.4 part under nitrogen protection, vacuum tightness-0.095～-stir the 20min plastic emitting under the condition of 0.1MPa;
Described B component can also adopt following concrete steps to make: the α that is 3000mpa.s by 25 ℃ of lower viscositys, and 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 1 part of polyoxyethylene nonylphenol ether, in vacuum tightness-0.095～-mix de-bubbled under the condition of 0.1MPa.Add 10 parts of deionized waters under the nitrogen protection condition, vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa.The light calcium carbonate that adds successively 3 parts of thermal silicas and 40 parts under the nitrogen protection condition, vacuum tightness-0.095～-stirred, disperseed until evenly without the particle plastic emitting under the condition of 0.1MPa.
The beneficial effect that the present invention compares with conventional art:
The advantage of Novel bi-component dealcoholization type silicon rubber sealant is to have solved on the one hand the single-component silicon rubber shortcoming larger to the ambient temperature and humidity dependency, has also reduced the susceptibility of bicomponent system to mixing errors and error in dipping on the other hand when acceleration is curing.Component A of the present invention can provide the final strength value suitable with the B component mixture with component A, and stability in storage is good.Moisture in B component, water can directly add and also be carried on filler material with the free state form, contains reactive polymer in B simultaneously, can activate by the catalyzer with component A, simultaneously, under the promotion of B component water, with the linking agent generation Quick cross-linking in A, react.Therefore, this pair of Component System can in very large range change the ratio between component A and B component, and can not have a negative impact to final strength.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, the present invention is described in more detail.
The present invention relates to a kind of Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof, it is characterized in that this silicone rubber sealant comprises following A, two components of B, the volumetric mixture ratio of A, B is that 20:1 is to 2:1.
1) component A, comprise following component, and each component is as follows by weight:
A
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes
A
2. dimethyl silicone oil 10-30 part
A
3. dealcoholizing-type linking agent 3-8 part
A
4. silane coupling agent 1-5 part
A
5. reinforced filling 10-100 part
A
6. catalyzer 0.1-0.6 part
Described A
1component is α, alpha, omega-dihydroxy polydimethyl siloxane, and its molecular structural formula is
hO[(CH3) 2 siO] n h,during n=300～1500,25 ℃, viscosity is 1000-50000mpa.s, the α that preferred viscosities is 20000mpa.s, alpha, omega-dihydroxy polydimethyl siloxane.
Described A
2component is dimethyl silicone oil, and its molecular structural formula is
(CH 3 ) 3 siO[(CH3) 2 siO] n si (CH 3 ) 3 , during n=50～230,25 ℃, viscosity is 50-500mpa.s, the dimethyl silicone oil that preferred viscosities is 500mpa.s.
Described A
3component is the dealcoholizing-type linking agent, selects in methyltrimethoxy silane, vinyltrimethoxy silane, tetraethoxy and its partial hydrolystate at least one or several combinations.The combination of preferred vinyl Trimethoxy silane and tetraethoxy partial hydrolystate.
Described A
4component is silane coupling agent, select in γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane and γ-urea propyl trimethoxy silicane at least one or several combinations.The preferably combination of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane.
Described A
5component is reinforced filling, selects in gas-phase silica and light calcium carbonate the combination of at least one or several fillers.The gas-phase silica surface is general through dimethyldichlorosilane(DMCS) or hexamethyldisilazane modification, and light calcium carbonate is generally processed through surface-modifying agents such as lipid acid, sylvic acids.
Described A
6component is the moisture-curable catalyzer, selects at least one in dibutyl tin laurate, two lauric acid dioctyl tins, stannous octoate, tetrabutyl titanate ester, four isobutyl-titanic acid ester, tetra isopropyl titanate.Preferred dibutyl tin laurate.
The preparation method of component A is: by the A of certain proportioning
1, A
2in vacuum tightness-0.095～-mix de-bubbled, N under the condition of 0.1MPa
2add successively A under protection
3component, A
4component, A
5component and A
6component, after adding at every turn all in vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa, finally can make the component A of similar single-component de-alcoholized silicon rubber.
2) B component comprises following component:
B
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes
B
2.tensio-active agent 1-2 part
B
3. deionized water 8-15 part
B
4. reinforced filling 10-100 part
Described B
1component is α, alpha, omega-dihydroxy polydimethyl siloxane, and its molecular structural formula is
hO[(CH3) 2 siO] n h,during n=300～1500,25 ℃, viscosity is 1000-50000mpa.s, the α that preferred viscosities is 3000mpa.s, alpha, omega-dihydroxy polydimethyl siloxane.
Described B
2component is tensio-active agent, selects polyoxyethylene nonylphenol ether
Described B
3component is deionized water, and chemical formula is H
2o
Described B
4component is reinforced filling, selects in gas-phase silica and light calcium carbonate the combination of at least one or several fillers.The gas-phase silica surface is general through dimethyldichlorosilane(DMCS) or hexamethyldisilazane modification, and light calcium carbonate is generally processed through surface-modifying agents such as lipid acid, sylvic acids.
The preparation method of B component is: by the B of certain proportioning
1, B
2in vacuum tightness-0.095～-mix de-bubbled, N under the condition of 0.1MPa
2add successively B under protection
3, B
4component, add all in vacuum tightness-0.095～-stir 20min under 0.1MPa condition, finally can make B component. at every turn
Embodiment:
The α that is 20000mpa.s by 25 ℃ of lower viscositys, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 20 parts of the dimethyl silicone oils that viscosity is 500mpa.s, in vacuum tightness-0.095～-mix de-bubbled under the condition of 0.1MPa.Add 4 parts of vinyltrimethoxy silanes under nitrogen protection; then in vacuum tightness-0.095～-stirring 20min under the condition of 0.1MPa carries out end capping; add again the partial hydrolystate of 4 parts of tetraethoxys under nitrogen protection, vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa.The mixture that adds 2 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and 2 parts of γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicanes under nitrogen protection, vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa.The light calcium carbonate that adds successively 5 parts of thermal silicas and 50 parts under the nitrogen protection condition, vacuum tightness-0.095～-stirred, disperseed under the condition of 0.1MPa until to evenly without particle.Add fast the dibutyl tin laurate of 0.4 part under nitrogen protection, vacuum tightness-0.095～-stir the 20min plastic emitting under the condition of 0.1MPa can make component A.
The α that is 3000mpa.s by 25 ℃ of lower viscositys, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 1 part of polyoxyethylene nonylphenol ether, in vacuum tightness-0.095～-mix de-bubbled under the condition of 0.1MPa.Add 10 parts of deionized waters under the nitrogen protection condition, vacuum tightness-0.095～-stir 20min under the condition of 0.1MPa.The light calcium carbonate that adds successively 3 parts of thermal silicas and 40 parts under the nitrogen protection condition, vacuum tightness-0.095～-stirred, disperseed until to evenly without the particle plastic emitting, making B component under the condition of 0.1MPa.
By A component silicone rubber sealant and the mixed silicone rubber sealant of two-pack 4:1,10:1 prepared in embodiment, utilize the mould of the about 2mm of thickness left and right to prepare the print of the about 2mm of thickness, under (23 ± 2) ℃, (50 ± 5) % humidity condition, solidify 14 days, be cut into dumbbell shape with special-purpose cut-off knife, press the GB/T531 tested for hardness, press GB/T528 test tensile strength and elongation at break.From test data, can find out, the mixed surface drying time of two components is compared shortening with single-component A, the mechanical property of different mixing proportion 4:1 and 10:1 (tensile strength, elongation at break, hardness) differs also little with single-component A, has embodied the insensitivity to blending ratio.
Table 1
| Test event | Component A | 4:1 mixes | 10:1 mixes |
| Surface drying time/min | 29 | 18 | 17 |
| Hardness/A | 33 | 35 | 32 |
| Tensile strength/MPa | 1.9 | 1.9 | 1.8 |
| Elongation at break/% | 595 | 550 | 580 |
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect have been carried out to further detailed description; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a bi-component dealcoholization type silicon rubber sealant, is characterized in that, this silicone rubber sealant comprises following A, two components of B by weight:
Component A comprises following component:
A
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, its molecular structural formula is HO[(CH
3)
2siO]
nh, n=300～1500;
A
2. dimethyl silicone oil 10-30 part, its molecular structural formula is (CH
3)
3siO[(CH
3)
2siO]
nsi (CH
3)
3, n=50～230;
A
3. dealcoholizing-type linking agent 3-8 part;
A
4. silane coupling agent 1-5 part;
A
5. reinforced filling 10-100 part;
A
6. catalyzer 0.1-0.6 part;
2) B component comprises following component:
B
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, its molecular structural formula is HO[(CH
3)
2siO]
nh, n=300～1500;
B
2. tensio-active agent 1-2 part, select polyoxyethylene nonylphenol ether;
B
3.deionized water 8-15 part, chemical formula is H
2o;
B
4. reinforced filling 10-100 part, the combination of selecting in gas-phase silica and light calcium carbonate at least one or several fillers;
Wherein, the volumetric mixture ratio of A, B is that 20:1 is to 2:1.
2, silicone rubber sealant according to claim 1, is characterized in that, described A
3the dealcoholizing-type linking agent, select in methyltrimethoxy silane, vinyltrimethoxy silane, tetraethoxy and its partial hydrolystate at least one or several combinations;
Described A
4silane coupling agent, select in γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane and γ-urea propyl trimethoxy silicane at least one or several combinations;
Described A
5reinforced filling, the combination of selecting at least one or two fillers in gas-phase silica and light calcium carbonate;
Described A
6catalyzer, select at least one in dibutyl tin laurate, two lauric acid dioctyl tins, stannous octoate, tetrabutyl titanate ester, four isobutyl-titanic acid ester and tetra isopropyl titanate;
Described B
1α, alpha, omega-dihydroxy polydimethyl siloxane viscosity in the time of 25 ℃ is 1000-50000mpa.s;
Described B
4the gas-phase silica surface is through dimethyldichlorosilane(DMCS) or hexamethyldisilazane modification, and light calcium carbonate is processed through lipid acid, sylvic acid surface-modifying agent.
3, silicone rubber sealant according to claim 2, is characterized in that, the volumetric mixture ratio of described A, B is 4:1; Described B
1α, alpha, omega-dihydroxy polydimethyl siloxane viscosity in the time of 25 ℃ is 3000mpa.s.
4, a kind of preparation method of the bi-component dealcoholization type silicon rubber sealant as one of claim 1-3, is characterized in that, described this silicone rubber sealant is comprised of A, two components of B;
The preparation method of component A is: by the A of certain proportioning
1, A
2in vacuum-0.095 ~-mix de-bubbled, N under the condition of 0.1MPa
2add successively A under protection
3component, A
4component, A
5component and A
6component, add all in vacuum tightness-0.095 ~-stir 20min under 0.1MPa condition, finally can make component A; at every turn
The preparation method of B component is: by the B of certain proportioning
1, B
2in vacuum tightness-0.095 ~-mix de-bubbled, N under the condition of 0.1MPa
2add successively B under protection
3, B
4component, add all in vacuum tightness-0.095 ~-stir 20min under 0.1MPa condition, finally can make B component; at every turn
Wherein,
A
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes;
A
2. dimethyl silicone oil 10-30 part;
A
3. dealcoholizing-type linking agent 3-8 part;
A
4. silane coupling agent 1-5 part;
A
5. reinforced filling 10-100 part;
A
6. catalyzer 0.1-0.6 part;
B
1. α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes;
B
2. tensio-active agent 1-2 part, select polyoxyethylene nonylphenol ether;
B
3.deionized water 8-15 part;
B
4. reinforced filling 10-100 part, the combination of selecting in gas-phase silica and light calcium carbonate at least one or several fillers.
5, the preparation method of silicone rubber sealant according to claim 4, is characterized in that, described A
3the dealcoholizing-type linking agent, select in methyltrimethoxy silane, vinyltrimethoxy silane, tetraethoxy and its partial hydrolystate at least one or several combinations;
Described A
4silane coupling agent, select in γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-mercaptopropyl trimethoxysilane and γ-urea propyl trimethoxy silicane at least one or several combinations;
Described A
5reinforced filling, the combination of selecting at least one or two fillers in gas-phase silica and light calcium carbonate;
Described A
6catalyzer, select at least one in dibutyl tin laurate, two lauric acid dioctyl tins, stannous octoate, tetrabutyl titanate ester, four isobutyl-titanic acid ester and tetra isopropyl titanate;
Described B
1α, alpha, omega-dihydroxy polydimethyl siloxane viscosity in the time of 25 ℃ is 3000mpa.s;
Described B
4the gas-phase silica surface is through dimethyldichlorosilane(DMCS) or hexamethyldisilazane modification, and light calcium carbonate is processed through lipid acid, sylvic acid surface-modifying agent.
6, the preparation method of silicone rubber sealant according to claim 5, it is characterized in that, described component A adopts following concrete steps to make: the α that is 20000mpa.s by 25 ℃ of lower viscositys, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 20 parts of the dimethyl silicone oils that viscosity is 500mpa.s, in vacuum tightness-0.095 ~-mix de-bubbled under the condition of 0.1MPa; Add 4 parts of vinyltrimethoxy silanes under nitrogen protection, then in vacuum tightness-0.095 ~-stirring 20min under the condition of 0.1MPa carries out end capping, add again the partial hydrolystate of 4 parts of tetraethoxys under nitrogen protection, vacuum tightness-0.095 ~-stir 20min under the condition of 0.1MPa; The mixture that adds 2 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and 2 parts of γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicanes under nitrogen protection, vacuum tightness-0.095 ~-stir 20min under the condition of 0.1MPa; The light calcium carbonate that adds successively 5 parts of thermal silicas and 50 parts under the nitrogen protection condition, vacuum tightness-0.095 ~-stirred, disperseed until evenly without particle under the condition of 0.1MPa; Add the dibutyl tin laurate of 0.4 part under nitrogen protection, vacuum tightness-0.095 ~-stir the 20min plastic emitting under the condition of 0.1MPa;
Described B component adopts following concrete steps to make: the α that is 3000mpa.s by 25 ℃ of lower viscositys, and 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 1 part of polyoxyethylene nonylphenol ether, in vacuum tightness-0.095 ~-mix de-bubbled under the condition of 0.1MPa; Add 10 parts of deionized waters under the nitrogen protection condition, vacuum tightness-0.095 ~-stir 20min under the condition of 0.1MPa; The light calcium carbonate that adds successively 3 parts of thermal silicas and 40 parts under the nitrogen protection condition, vacuum tightness-0.095 ~-stirred, disperseed until evenly without the particle plastic emitting under the condition of 0.1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110303287 CN102408722B (en) | 2011-10-10 | 2011-10-10 | Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110303287 CN102408722B (en) | 2011-10-10 | 2011-10-10 | Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN102408722A CN102408722A (en) | 2012-04-11 |
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| CN103539483B (en) * | 2013-09-26 | 2015-03-04 | 国家电网公司 | Formula of post insulator cement crack filling repairing agent and preparation method |
| CN103805136A (en) * | 2013-12-11 | 2014-05-21 | 常熟市希诺包装制品有限公司 | Sealant |
| CN104194195A (en) * | 2014-07-29 | 2014-12-10 | 安徽九子山塑业有限公司 | Flame-retardant high-reinforcement filler for PVC tubes and preparation method of flame-retardant high-reinforcement filler |
| CN104194194A (en) * | 2014-07-29 | 2014-12-10 | 安徽九子山塑业有限公司 | Special-purpose filler for oxidization-resistant wear-resisting PVC (polyvinyl chloride) tube and preparation method for special-purpose fertilizer |
| CN106867443A (en) * | 2015-12-10 | 2017-06-20 | 江苏天辰新材料股份有限公司 | A kind of dealcoholysis condensed type double-component room temperature vulcanized silicone rubber building sealant and preparation method thereof |
| CN106221241A (en) * | 2016-08-31 | 2016-12-14 | 江苏天辰新材料股份有限公司 | A kind of medical dual composition addition type liquid silastic and preparation method thereof |
| CN108570304A (en) * | 2017-03-14 | 2018-09-25 | 北京天山新材料技术有限公司 | A kind of two-component silicone rubber bonding agent of wet and heat ageing resistant and preparation method thereof |
| CN110982448B (en) * | 2019-12-24 | 2021-02-02 | 广州市白云化工实业有限公司 | Tackifier, dealcoholized RTV (room temperature vulcanized) silicone rubber and preparation method thereof |
| CN111910165A (en) * | 2020-07-20 | 2020-11-10 | 上海空间电源研究所 | Exposed metal protection liquid and protection method in PECVD (plasma enhanced chemical vapor deposition) process |
| CN112063359A (en) * | 2020-07-29 | 2020-12-11 | 广东美的厨房电器制造有限公司 | Adhesive composition and bonding method |
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