CN103320086A - Condensed double-component organosilicon sealant and preparation method thereof - Google Patents
Condensed double-component organosilicon sealant and preparation method thereof Download PDFInfo
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- CN103320086A CN103320086A CN2013102911175A CN201310291117A CN103320086A CN 103320086 A CN103320086 A CN 103320086A CN 2013102911175 A CN2013102911175 A CN 2013102911175A CN 201310291117 A CN201310291117 A CN 201310291117A CN 103320086 A CN103320086 A CN 103320086A
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Abstract
The invention discloses a condensed double-component organosilicon sealant. The condensed double-component organosilicon sealant comprises a component A and a component B, the weight ratio of the component A to the component B is 10:1-2:1, the component A comprises, by weight, 100 parts of alpha, omega-dihydroxypolydimethylsiloxane, 60-120 parts of a filler, 1-5 parts of a pigment, 5-60 parts of a plasticizer and 0.5-5 parts of a thixotropic agent, and the component B comprises, by weight, 5-15 parts of a polyfunctional organosilicon cross-linking agent, 1-5 parts of a silane coupling agent, 0.05-0.5 parts of a catalyst, 5-20 parts of the pigment, 0.5-5 parts of the thixotropic agent and 30-80 parts of the plasticizer. The condensed double-component organosilicon sealant has a tensile strength and a shear strength reaching above 2.0MPa respectively, has an elongation at break reaching above 700%, has an adjustable operating time, can rapidly and deeply solidify at room temperature, and has the advantages of high thixotropy, high elasticity, good weatherability, good storage stability and the like.
Description
Technical field
The present invention relates to the seal gum technical field, relate in particular to a kind of condensed type two-pack organosilicon sealant and preparation method thereof.
Background technology
Self cure condensed type silicon rubber can be divided into single-component room-temperature vulcanized condensed type silicon rubber (RTV-1) and two-component room-temperature-vulcanized condensed type silicon rubber (RTV-2) by its packaging means, moiety, use technique.
RTV-1 uses technique convenient and simple, and adhesiveproperties and mechanical property are excellent, but its curing speed is slow.Owing to RTV-1 reacts with airborne moisture to be solidified into elastomerics, from the surface, gradually to inside solidification, its curing depth only has 10mm in the certain hour during curing, and is difficult to solidify in the middle of large-area material.Along with the development of electronic apparatus, sun power, automotive components assembling, more and more higher to the curing speed requirement of organosilicon sealant, the curing speed of RTV-1 becomes one of problem that affects assigned line production efficiency.The assembling of electronic apparatus, automotive components requires not only that integrally curing speed is fast, good springiness, also requires seal gum to have excellent electric insulating quality and resistance to deterioration, so RTV-1 uses at these certain limitation is arranged.
RTV-2 is take hydroxy-end capped polydimethylsiloxane as base resin, cooperates with linking agent, coupling agent, catalyzer, filler etc. to form, and solidify slowly with respect to the deep layer of RTV-1 silicon rubber, but the RTV-2 rapid deep zone solidifies.In addition, RTV-2 has the premium propertiess such as high-low temperature resistant, weather-proof, vibration damping.The at present existing application of RTV-2 silicon rubber in electronic apparatus and automotive components, but existing RTV-2 silicon rubber is also very undesirable in whole fast setting, thixotropy, mechanical properties.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of condensed type two-pack organosilicon sealant, it is bonding that sealing glue not only can big area, and curing speed is fast, also has excellent adhesiveproperties, mechanical property and thixotropy.
Another object of the present invention is to provide a kind of preparation method of condensed type two-pack organosilicon sealant, the method is simple to operate, is easy to large-scale production and application.
In order to solve the problems of the technologies described above, on the one hand, the invention provides a kind of condensed type two-pack organosilicon sealant, comprise component A and component B, it is characterized in that: in parts by weight, component A comprises following composition:
In parts by weight, component B comprises following composition:
Wherein, in parts by weight, the ratio of component A and component B is 10:1～2:1.
In a preferred embodiment, described organosilicon sealant is paste.
In a preferred embodiment, described α, alpha, omega-dihydroxy polydimethyl siloxane are 107 glue of range of viscosities 1500～20000cps or composite 107 glue of range of viscosities 1500～20000cps.Composite 107 glue refer to that 107 glue of the different viscosity of range of viscosities between 1500～20000cps mix with arbitrary ratio, and 107 glue are also referred to as 107 room temperature vulcanized silicone rubbers.
In a preferred embodiment, described softening agent is the dimethyl silicone oil of range of viscosities 100～1000cps.
In a preferred embodiment, described polyfunctional group organosilicon cross-linking agent is one or more the mixture in methyl silicate, tetraethoxy, positive silicic acid propyl ester, butyl silicate, Union carbide A-162, dimethyldiethoxysilane, vinyltrimethoxy silane, the vinyltriethoxysilane.
In a preferred embodiment, described silane coupling agent is γ-aminopropyl triethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-[(2,3)-and epoxy the third oxygen] propyl trimethoxy silicane, anilinomethyl triethoxysilane, γ-chloropropyl triethoxysilane, γ-r-chloropropyl trimethoxyl silane, 3-[(2,3)-epoxy the third oxygen] one or more mixture in the propyl group methyl dimethoxysilane, gamma-mercaptopropyltriethoxysilane.
In a preferred embodiment, described catalyzer is one or both the mixture in dibutyl tin laurate, the dibutyltin diacetate.
In a preferred embodiment, described stopping composition is one or more the mixture in water-ground limestone, light calcium carbonate, silicon powder, the talcum powder; Described pigment is one or both mixture in U carbon black, the titanium dioxide.
In a preferred embodiment, described thixotropic agent is one or both the mixture in aerosil, the organobentonite.
On the other hand, the invention provides a kind of method for preparing condensed type two-pack organosilicon sealant, it is characterized in that, comprise the steps:
1) count by weight, with 100 parts of α, alpha, omega-dihydroxy polydimethyl siloxane, 60～120 parts of stopping composition, 1～5 part of pigment, 5～60 parts of softening agent, 0.5～5 part of thixotropic agent mix, and stir under the vacuum condition 2～4 hours, obtain the A component under the normal temperature;
2) count by weight, 30～80 parts of softening agent, 5～20 parts of pigment, 0.5～5 part of thixotropic agent are mixed, after being warming up to about 120 ℃, stirred under the vacuum condition 1～2 hour, be cooled to about 30 ℃, under nitrogen environment, add 5～15 parts of polyfunctional group organosilicon cross-linking agents, 1～5 part of silane coupling agent, 0.05～0.5 part of catalyzer, mix, obtain the B component;
3) the A component and the step 2 that step 1) are prepared) the B component for preparing by weight proportion 10:1～2:1 mix rear deaeration, obtain the condensed type double-component organosilicon seal gum after the curing.
Condensed type two-pack organosilicon sealant of the present invention compared with prior art has the following advantages:
1. thixotropy is good, and convenient operation is used.
2. strong adhesion, good springiness have good mechanical property.
3. the operating time can be regulated, but rapid deep zone solidifies under the room temperature, can be used between the various big area sheet materials bonding.
4. has higher intensity, excellent resistance to deterioration, resistant of high or low temperature and weathering resistance.
Because this condensed type two-pack organosilicon sealant has the multifrequency nature of overall balance, therefore can be widely used in a plurality of fields such as trolley part assembling, microwave oven cavity and panel adhering and sealing, electromagnetic oven base and microcrystal face plate are bonding, electronic component bonding, lamp assembled, the sealing of solar modules frame.
Embodiment
The inventor is through constantly testing, studying, make a kind of condensed type two-pack organosilicon sealant, it is slow that it can solve single component sealant curing speed commonly used well, and the shortcoming that can't use at big area sheet material has also improved adhesiveproperties and the physical strength of seal gum.And the preparation method of this product is very simple, is easy to suitability for industrialized production.
Various raw material of the present invention all can obtain or prepare according to the ordinary method of this area by commercially available.Unless otherwise defined or explanation, same meanings of being familiar with of all specialties used herein and scientific words and those skilled in the art.Any method similar or impartial to described content and material all can be applicable in the inventive method in addition.
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
In parts by weight, 100 parts in 107 glue, light calcium carbonate and 85 parts in water-ground limestone mixture, 2 parts of titanium dioxides, 5 parts of the dimethyl silicone oils of viscosity 100cps, 3 parts of adding stirrers of aerosil with viscosity 3000cps, under 0.099mpa vacuum tightness, stirred 2 hours, obtain the A component.
In parts by weight, mix in 5 parts of adding reactors of 20 parts of 80 parts of dimethyl silicone oils, U carbon blacks, aerosil with viscosity 300cps, constant temperature after slowly being warmed up to 120 ℃, after stirring 1 hour under the 0.099mpa vacuum tightness, cool to 30 ℃, under nitrogen environment, add 5 parts of tetraethoxys, 1 part of γ-aminopropyl triethoxysilane, 0.05 part of dibutyl tin laurate obtains the B component behind the mixing.
After prepared component A and component B mixed by weight 2:1, vacuum defoamation was solidified and is obtained condensed type two-pack organosilicon sealant.
Embodiment 2
In parts by weight, 100 parts in composite 107 glue, 60 parts of light calcium carbonates, 5 parts of titanium dioxides, 30 parts of the dimethyl silicone oils of viscosity 500cps, 5 parts of adding stirrers of aerosil with viscosity 20000cps and viscosity 10000cps, under 0.099mpa vacuum tightness, stirred 3 hours, obtain the A component.
In parts by weight, mix in 5 parts of adding reactors of 8 parts of 60 parts of dimethyl silicone oils, U carbon blacks, aerosil with viscosity 1000cps, constant temperature after slowly being warmed up to 120 ℃, after stirring 1.5 hours under the 0.099mpa vacuum tightness, cool to 30 ℃, under nitrogen environment, add 10 parts in tetraethoxy and methyl silicate mixture, N-(β-aminoethyl)-3 parts of γ-aminopropyltrimethoxysilanes, 0.1 part in dibutyltin diacetate and dibutyl tin laurate mixture obtain the B component behind the mixing.
After prepared component A and component B mixed by weight 4:1, vacuum defoamation was solidified and is obtained condensed type two-pack organosilicon sealant.
Embodiment 3
In parts by weight, 100 parts in 107 glue, silicon powder and 120 parts in light calcium carbonate mixture, 1 part of titanium dioxide, 60 parts of the dimethyl silicone oils of viscosity 500cps, 0.5 part of adding stirrer of organobentonite with viscosity 2500cps, under 0.099mpa vacuum tightness, stirred 4 hours, obtain the A component.
In parts by weight, to mix in 30 parts of dimethyl silicone oils, titanium dioxide and 12 parts of the U carbon black stocks of viscosity 500cps, 0.5 part of adding reactor of organobentonite, constant temperature after slowly being warmed up to 120 ℃, after stirring 2 hours under the 0.099mpa vacuum tightness, cool to 30 ℃, under nitrogen environment, add 15 parts in dimethyldiethoxysilane and tetraethoxy mixture, γ-aminopropyl triethoxysilane and N-(β-aminoethyl)-5 parts in γ-aminopropyltrimethoxysilane mixture, 0.3 part of dibutyl tin laurate obtains the B component behind the mixing.
After prepared component A and component B mixed by weight 5:1, vacuum defoamation was solidified and is obtained condensed type two-pack organosilicon sealant.
Embodiment 4
In parts by weight, 100 parts in composite 107 glue, 100 parts of light calcium carbonates, 1 part of U carbon black, 50 parts of the dimethyl silicone oils of viscosity 500cps, 5 parts of adding stirrers of aerosil with viscosity 5000cps and viscosity 20000cps, under 0.099mpa vacuum tightness, stirred 2.5 hours, obtain the A component.
In parts by weight, mix in 10 parts of 40 parts of dimethyl silicone oils, U carbon blacks, aerosil and 4 parts of adding reactors of organobentonite mixture with viscosity 500cps, constant temperature after slowly being warmed up to 120 ℃, after stirring 2 hours under the 0.099mpa vacuum tightness, cool to 30 ℃, under nitrogen environment, add 15 parts in methyl silicate and vinyltriethoxysilane mixture, γ-aminopropyl triethoxysilane and 3-[(2,3)-and epoxy the third oxygen] 5 parts in propyl group methyl dimethoxysilane mixture, 0.5 part of dibutyltin diacetate obtains the B component behind the mixing.
After prepared component A and component B mixed by weight 10:1, vacuum defoamation was solidified and is obtained condensed type two-pack organosilicon sealant.
Comparing embodiment:
In parts by weight, in 50 parts of 80 parts of 100 parts in 107 glue, water-ground limestones, the light calcium carbonates of viscosity 1500cps, 65 parts of the dimethyl silicone oils of viscosity 100cps, 5 parts of adding stirrers of U carbon black, under 0.099mpa vacuum tightness, stirred 1 hour, obtain the A component.
In parts by weight, 5 parts of 10 parts of 10 parts of 75 parts of dimethyl silicone oils, methyltrimethoxy silanes, tetraethoxys, γ-aminopropyl triethoxysilanes, 0.5 part of dibutyl tin dilaurate with viscosity 100cps, add in the sealed vessel bottle, after mixing, obtain the B component.
After prepared component A and component B mixed by weight 10:1, vacuum defoamation was solidified and is obtained condensed type two-pack seal gum.
Performance test
The two-pack organosilicon sealant that embodiment 1～4 and comparing embodiment make is tested shore hardness by GB/T531-1999; Press GB/T528-1998 test elongation at break and tensile strength; Press GB/T529-1991 test tear strength; Press the GB16776-2005 test operation time, test result is as shown in table 1.
Table 1
Compare with comparing embodiment, proportioning and preparation method to each composition among the component A of embodiment, the component B improve.Can be found out by above-mentioned comparative test result, condensed type two-pack organosilicon sealant of the present invention not only can make the curing speed of seal gum greatly promote, thixotropy is good, convenient operation is used, its adhesiveproperties and mechanical property are also very excellent, its tensile strength and shearing resistance can reach more than the 2.0MPa, and elongation rate of tensile failure is up to more than 700%.And, can also improve by the mode of suitably heating the curing speed of sealing agent, improve envrionment temperature or humidity its curing speed is accelerated.
Above disclosed is preferred embodiment of the present invention only, and for one of ordinary skill in the art, the thought according to content of the present invention all will change in specific embodiments and applications.In sum, this description should not be construed as limitation of the present invention, and all any changes of doing according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (10)
1. a condensed type two-pack organosilicon sealant comprises component A and component B, it is characterized in that: in parts by weight, component A comprises following composition:
In parts by weight, component B comprises following composition:
Wherein, in parts by weight, the ratio of component A and component B is 10:1～2:1.
2. condensed type two-pack organosilicon sealant as claimed in claim 1, it is characterized in that: described organosilicon sealant is paste.
3. condensed type two-pack organosilicon sealant as claimed in claim 1, it is characterized in that: described α, alpha, omega-dihydroxy polydimethyl siloxane are 107 glue of range of viscosities 1500～20000cps or composite 107 glue of range of viscosities 1500～20000cps.
4. condensed type two-pack organosilicon sealant as claimed in claim 1, it is characterized in that: described softening agent is the dimethyl silicone oil of range of viscosities 100～1000cps.
5. condensed type two-pack organosilicon sealant as claimed in claim 1 is characterized in that: described polyfunctional group organosilicon cross-linking agent is one or more the mixture in methyl silicate, tetraethoxy, positive silicic acid propyl ester, butyl silicate, Union carbide A-162, dimethyldiethoxysilane, vinyltrimethoxy silane, the vinyltriethoxysilane.
6. condensed type two-pack organosilicon sealant as claimed in claim 1, it is characterized in that: described silane coupling agent is γ-aminopropyl triethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-[(2,3)-and epoxy the third oxygen] propyl trimethoxy silicane, anilinomethyl triethoxysilane, γ-chloropropyl triethoxysilane, γ-r-chloropropyl trimethoxyl silane, 3-[(2,3)-epoxy the third oxygen] one or more mixture in the propyl group methyl dimethoxysilane, gamma-mercaptopropyltriethoxysilane.
7. condensed type two-pack organosilicon sealant as claimed in claim 1 is characterized in that: described catalyzer is one or both the mixture in dibutyl tin laurate, the dibutyltin diacetate.
8. condensed type two-pack organosilicon sealant as claimed in claim 1 is characterized in that: described stopping composition is one or more the mixture in water-ground limestone, light calcium carbonate, silicon powder, the talcum powder; Described pigment is one or both mixture in U carbon black, the titanium dioxide.
9. condensed type two-pack organosilicon sealant as claimed in claim 1 is characterized in that: described thixotropic agent is one or both the mixture in aerosil, the organobentonite.
10. a method for preparing condensed type two-pack organosilicon sealant as claimed in claim 1 is characterized in that, comprises the steps:
1) count by weight, with 100 parts of α, alpha, omega-dihydroxy polydimethyl siloxane, 60～120 parts of stopping composition, 1～5 part of pigment, 5～60 parts of softening agent, 0.5～5 part of thixotropic agent mix, and stir under the vacuum condition 2～4 hours, obtain the A component under the normal temperature;
2) count by weight, 30～80 parts of softening agent, 5～20 parts of pigment, 0.5～5 part of thixotropic agent are mixed, after being warming up to about 120 ℃, stirred under the vacuum condition 1～2 hour, be cooled to about 30 ℃, under nitrogen environment, add 5～15 parts of polyfunctional group organosilicon cross-linking agents, 1～5 part of silane coupling agent, 0.05～0.5 part of catalyzer, mix, obtain the B component;
3) the A component and the step 2 that step 1) are prepared) the B component for preparing by weight proportion 10:1～2:1 mix rear deaeration, obtain the condensed type double-component organosilicon seal gum after the curing.
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Cited By (13)
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| CN103788657A (en) * | 2014-01-24 | 2014-05-14 | 东南大学 | Preparation method of polymer for packaging large-scale integrated circuit |
| CN105295827A (en) * | 2015-11-06 | 2016-02-03 | 航天材料及工艺研究所 | Rocket body structure waterproof sealant |
| CN106190017A (en) * | 2016-08-08 | 2016-12-07 | 岳胜武 | Condensed type three component TPU silicon gel and preparation method thereof |
| CN107446354A (en) * | 2017-06-08 | 2017-12-08 | 仲恺农业工程学院 | A kind of silicon composition and preparation method thereof |
| CN107868466A (en) * | 2017-12-15 | 2018-04-03 | 深圳市红叶杰科技有限公司 | A kind of double-component condensed type high-temperature-resisting silicon rubber and preparation method |
| CN108329833A (en) * | 2018-02-11 | 2018-07-27 | 江西品汉新材料有限公司 | A kind of roof heat dissipation organosilicon coating |
| CN109486467A (en) * | 2018-10-12 | 2019-03-19 | 林菊琴 | A kind of cured transparent organic silicon sealant of rapid deep zone and preparation method thereof |
| CN110373151A (en) * | 2019-08-23 | 2019-10-25 | 深圳市红叶杰科技有限公司 | A kind of room temperature fast-curing wire and cable packaging silicon rubber and preparation method thereof |
| CN110591638A (en) * | 2019-11-04 | 2019-12-20 | 镇江博慎新材料有限公司 | Low-proportion bi-component dealcoholized organosilicon sealant and preparation method and application thereof |
| CN112280523A (en) * | 2020-09-21 | 2021-01-29 | 湖北平安电工材料有限公司 | Process for prolonging gelling time of hard mica plate adhesive and adhesive |
| CN113004697A (en) * | 2021-03-11 | 2021-06-22 | 湖南航天三丰科工有限公司 | Protective sealing material and preparation and construction method thereof |
| CN113234415A (en) * | 2021-06-10 | 2021-08-10 | 东莞市拜尔电子材料有限公司 | Bi-component structural adhesive |
| CN115386293A (en) * | 2022-09-22 | 2022-11-25 | 杭州赛维动力科技有限公司 | Sprayable silicone adhesive for power equipment and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103788657A (en) * | 2014-01-24 | 2014-05-14 | 东南大学 | Preparation method of polymer for packaging large-scale integrated circuit |
| CN105295827B (en) * | 2015-11-06 | 2018-08-07 | 航天材料及工艺研究所 | A kind of rocket body structure waterproof sealing agent |
| CN105295827A (en) * | 2015-11-06 | 2016-02-03 | 航天材料及工艺研究所 | Rocket body structure waterproof sealant |
| CN106190017A (en) * | 2016-08-08 | 2016-12-07 | 岳胜武 | Condensed type three component TPU silicon gel and preparation method thereof |
| CN107446354A (en) * | 2017-06-08 | 2017-12-08 | 仲恺农业工程学院 | A kind of silicon composition and preparation method thereof |
| CN107868466A (en) * | 2017-12-15 | 2018-04-03 | 深圳市红叶杰科技有限公司 | A kind of double-component condensed type high-temperature-resisting silicon rubber and preparation method |
| CN108329833A (en) * | 2018-02-11 | 2018-07-27 | 江西品汉新材料有限公司 | A kind of roof heat dissipation organosilicon coating |
| CN109486467A (en) * | 2018-10-12 | 2019-03-19 | 林菊琴 | A kind of cured transparent organic silicon sealant of rapid deep zone and preparation method thereof |
| CN110373151A (en) * | 2019-08-23 | 2019-10-25 | 深圳市红叶杰科技有限公司 | A kind of room temperature fast-curing wire and cable packaging silicon rubber and preparation method thereof |
| CN110591638A (en) * | 2019-11-04 | 2019-12-20 | 镇江博慎新材料有限公司 | Low-proportion bi-component dealcoholized organosilicon sealant and preparation method and application thereof |
| CN112280523A (en) * | 2020-09-21 | 2021-01-29 | 湖北平安电工材料有限公司 | Process for prolonging gelling time of hard mica plate adhesive and adhesive |
| CN113004697A (en) * | 2021-03-11 | 2021-06-22 | 湖南航天三丰科工有限公司 | Protective sealing material and preparation and construction method thereof |
| CN113234415A (en) * | 2021-06-10 | 2021-08-10 | 东莞市拜尔电子材料有限公司 | Bi-component structural adhesive |
| CN115386293A (en) * | 2022-09-22 | 2022-11-25 | 杭州赛维动力科技有限公司 | Sprayable silicone adhesive for power equipment and preparation method thereof |
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Application publication date: 20130925 |