CN101724377A - High-strength condensed type double-component organosilicon acid-resisting sealant and preparation method thereof - Google Patents
High-strength condensed type double-component organosilicon acid-resisting sealant and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a high-strength condensed type double-component organosilicon acid-resisting sealant and a preparation method thereof. In the invention, a component A is prepared by mixing 107 silastic, fillings, paints, a plasticiser and a deep solidifying accelerator and a component B is prepared from a multifunctional group organosilicon crosslinker, a coupling agent and a catalyst. The component A and the component B are mixed according to a certain proportion to prepare the high-strength condensed type double-component organosilicon acid-resisting sealant in using process. Even immersed in a sulfuric acid solution with a concentration of 5% for 15 days, the strength variation of the sealant is no more than 20%, the tensile-strength is above 2.0MPa and the shear strength is above 1.8MPa. The invention has the advantages of short operation time, fast deep solidification at room temperature, higher-strength adhesion force, sound acid-resisting and weather-resisting performances and long service life and is mainly applied to the acid-resisting field of flues of the power plant and the field of high-strength adhesion.
Description
Technical field
The present invention relates to a kind of high-strength condensed type double-component organosilicon acid-resisting sealant and preparation method thereof, belong to the seal gum technical field.
Background technology
Room temperature vulcanized silicone rubber is to be basic glue with hydroxy-end capped polydimethylsiloxane, forms through cooperating with linking agent, catalyzer, filler etc., can be divided into one-pack type (RTV1 type) and two-component type (RTV2 type) by packaged form.
The shortcoming of single-component RTV1 type silicon rubber sealant is that deep layer is solidified slowly.It is strong that but the advantage of two component RTV2 type silicon rubber sealants is deep curing, quick solidifying, resistance to hydrolysis.Rubber composition has resistant of high or low temperature, weather resisteant, and premium propertiess such as chemical resistance, and form class rubber performance such as hardness and ductile solidifying product with excellence, thereby the value that has a wide range of applications.
In power plant flue building or acidproof field, used material of construction sealing agent must have certain intensity, hardness and good adhesive property, and can bear the secular corrosion of acidic medium in using and performance does not have greatly changed.The loss that has the document statistics whole world to cause because of acid corrosion in 1 year surpasses 10,000,000,000 dollars, and people more and more pay close attention to the problem of acid corrosion buildings and metal, especially the corrosion of flue.
The development of at present existing acid-resisting sealant.A kind of acidproof RTV silicon rubber sealant (Xu Yu etc., the development of acidproof RTV silicon rubber sealant, organosilicon material are disclosed as document, 2001,15 (4): 20-21), the performance in the pH6 weak acidic medium is more stable, but only is suitable for water purifier acid resistance dielectric seal.And for example denomination of invention is that " anticorrosive high temperature sealing glue " (publication number is CN1214356, open day is on April 21st, 1999) a kind of single-component anticorrosive high temperature sealing glue disclosed, its use temperature is wide, strong alkali-acid resistance, but because sealing glue need be heated to more than 100 ℃ and be cured, difficulty is solidified in the deep.Therefore the acid resistance or the use properties aspect of acid-resisting sealant of the prior art are still undesirable.
Summary of the invention
The objective of the invention is to overcome the defective of prior art acid-resisting sealant aspect acid resistance and performance easy to use, a kind of high-strength condensed type double-component organosilicon acid-resisting sealant is provided.The present invention is applicable to acidproof field and high strength bonding field.
Another object of the present invention provides a kind of preparation method of high-strength condensed type double-component organosilicon acid-resisting sealant.
For achieving the above object, the present invention can be achieved through the following technical solutions:
A kind of high-strength condensed type double-component organosilicon acid-resisting sealant comprises component A and component B, it is characterized in that, and with the two components of A, B, be that catalyzer carries out crosslinking reaction acquisition high-strength condensed type double-component organosilicon acid-resisting sealant through dibutyl tin laurate.
Sealing glue will have very high viscosity, so that better processing property is arranged, miniflow drops down or the thixotroping lotion so the viscosity of A component should be, and generally selects 107 silicon rubber of 5000-80000cps range of viscosities for use.In parts by weight, component A comprises following material:
107 silicon rubber 10
Pigment 0-10
Softening agent 5-15
Filler 60-150
Deep layer curing catalyst 0.1-1.5.
Described pigment is one or more the mixture in U carbon black, iron oxide black, the titanium dioxide.
Described softening agent is a silicone oil with low viscosity, comprises a kind of in 100cps silicone oil, the hydroxy silicon oil or both mixing.
Described filler is one or more the mixture in white carbon black, silica powder, diatomite, silicon powder, lime carbonate, the kaolin.
Described deep layer curing catalyst is the phosphatic aqueous solution, and wherein the weight percent concentration of the phosphatic aqueous solution is 0.1-0.4%.
In parts by weight, component B comprises following material:
Linking agent 30-50
Coupling agent 5-15
Dibutyl tin laurate 0.4-1.0.
Described linking agent is the polyfunctional group organosilicon cross-linking agent, as wherein one or more mixing of methyltrimethoxy silane, Union carbide A-162, tetraethoxysilane, dimethyldiethoxysilane, vinyltriethoxysilane, vinyltrimethoxy silane.
Described coupling agent is an organo-silicon coupling agent, as wherein one or more mixing of β-aminoethyl-γ-aminopropyl-triethoxyl silane or its dipolymer, γ-glycidoxypropyltrime,hoxysilane, γ-(methacryloxy) propyl trimethoxy silicane.
High-strength condensed type double-component organosilicon acid-resisting sealant of the present invention is realized by following steps:
Step 1: count by weight, with 100 part of 107 silicon rubber, 0-10 part pigment and 5-15 part softening agent mixing and stirring, add 60-150 part filler under the normal temperature, mix at 60 ℃-80 ℃, the cooling back adds 0.1-1.5 part deep layer curing catalyst, obtains the A component;
Step 2: count by weight, with 30-50 part linking agent, 5-15 part coupling agent and the mixing of 0.4-1.0 part dibutyl tin laurate obtain the B component;
Step 3: during use, the B component that A component that step 1 is prepared and step 2 prepare by weight proportion 100: 5-10 mixes the back deaeration, solidifies to obtain high-strength condensed type double-component organosilicon acid-resisting sealant.
In above-mentioned preparation method's the first step, when adding 107 silicon rubber, softening agent, count by weight, add the pigment of 0-10 part, can make the high-strength condensed type double-component organosilicon acid-resisting sealant of different colours.As add the U carbon black and be prepared into black high-strength degree acid-resisting sealant; Add iron oxide black and be prepared into blue mass colour high strength acid resistant seal gum; Add titanium dioxide and be prepared into white high strength acid resistant seal gum etc.
Owing to adopted technique scheme, the present invention has the following advantages:
1. high-strength condensed type double-component organosilicon acid-resisting sealant is neutral organic silica gel, not corroding metal.
2. operable time is short, but the room temperature rapid deep zone solidifies.
3. has higher intensity, good acid resistance energy, resistant of high or low temperature and weathering resistance, long service life.
4. described seal gum soaked in 5% sulfuric acid after 15 days, and its tensile strength and shearing resistance can reach 2.0MPa respectively and more than the 1.8MPa.
Embodiment
In order to make technique means of the present invention, creation characteristic, to reach purpose and effect is easy to understand,, further set forth the present invention, but embodiments of the present invention are not limited thereto below in conjunction with embodiment.
Embodiment 1
In parts by weight, under the normal temperature, with 100 parts of viscosity is 107 silicon rubber of 20000cps, 5 parts of U carbon blacks join in 15 parts of 100cps silicone oil and the 10 parts of hydroxy silicon oils, stir, and add 90 parts of silicon powders and 4 parts of thermal silicas, mix at 60 ℃, it is 0.1% aqueous phosphatic that the cooling back adds 1.4 parts of weight percent concentration, and sulfuration makes component A.With 50 parts of tetraethyl silicate, 10 parts of vinyltriethoxysilanes, 10 parts of β-aminoethyl-γ-aminopropyl-triethoxyl silanes, 5 parts of γ-glycidoxypropyltrime,hoxysilane, 0.8 part of mixed component B that gets of dibutyl tin laurate.During use, in parts by weight, component A and component B be by the evenly back deaeration of 100: 5 mixed, solidify high-strength condensed type double-component organosilicon acid-resisting sealant sheet A.After testing, performance perameter such as the table 1 of high-strength condensed type double-component organosilicon acid-resisting sealant sheet A.
The fundamental property of table 1 high-strength condensed type double-component organosilicon acid-resisting sealant sheet A
Sealing film cohesive force, strong adhesion have favorable mechanical performance and acid resistance.
Embodiment 2
In parts by weight, under the normal temperature, with 100 parts of viscosity is 107 silicon rubber of 50000cps, 5 parts of U carbon blacks join in 15 parts of 100cps silicone oil and the 10 parts of hydroxy silicon oils, stir, and add 70 parts of silicon powders and 10 parts of precipitated silicas, mix at 70 ℃, it is 0.3% aqueous phosphatic that the cooling back adds 1.4 parts of weight percent concentration, and sulfuration makes component A.With 30 parts of methyl silicates, 20 parts of dimethyldiethoxysilanes, 10 parts of vinyltrimethoxy silanes, 8 parts of γ-(methacryloxy) propyl trimethoxy silicanes, 10 parts of γ-glycidoxypropyltrime,hoxysilane, 0.9 part of mixed component B that gets of dibutyl tin laurate.During use, in weight ratio, component A and component B be by the evenly back deaeration of 100: 7 mixed, solidify high-strength condensed type double-component organosilicon acid-resisting sealant sheet B.After testing, performance perameter such as the table 2 of high-strength condensed type double-component organosilicon acid-resisting sealant sheet B.
The fundamental property of table 2 high-strength condensed type double-component organosilicon acid-resisting sealant sheet B
Embodiment 3
In parts by weight, under the normal temperature, with 100 parts of viscosity is 107 silicon rubber of 50000cps, 5 parts of U carbon blacks join in 15 parts of 100cps silicone oil and the 10 parts of hydroxy silicon oils, stir, and add 100 parts of lime carbonate and 10 parts of thermal silicas, mix at 80 ℃, it is 0.4% aqueous phosphatic that the cooling back adds 1.4 parts of weight percent concentration, and sulfuration makes component A.With 30 parts of methyl silicates, 20 parts of dimethyldiethoxysilanes, 10 parts of vinyltrimethoxy silanes, 5 parts of γ-(methacryloxy) propyl trimethoxy silicanes, 10 parts of β-aminoethyl-γ-aminopropyl-triethoxyl silanes, 1 part of mixed component B that gets of dibutyl tin laurate.During use, in weight ratio, component A and component B be by the evenly back deaeration of 100: 10 mixed, solidify high-strength condensed type double-component organosilicon acid-resisting sealant sheet C.After testing, performance perameter such as the table 3 of high-strength condensed type double-component organosilicon acid-resisting sealant sheet C.
The fundamental property of table 3 high-strength condensed type double-component organosilicon acid-resisting sealant sheet C
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (12)
1. a high-strength condensed type double-component organosilicon acid-resisting sealant comprises component A and component B, it is characterized in that, in parts by weight, component A comprises following material:
107 silicon rubber 100
Pigment 0-10
Softening agent 5-15
Filler 60-150
Deep layer curing catalyst 0.1-1.5;
In parts by weight, component B comprises following material:
Linking agent 30-50
Coupling agent 5-15
Dibutyl tin laurate 0.4-1.0
In part by weight, the ratio of component A and component B is 100: 5-10.
2. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 1 is characterized in that, described pigment is one or more the mixture in U carbon black, iron oxide black, the titanium dioxide.
3. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 1 is characterized in that, described softening agent is a silicone oil with low viscosity.
4. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 3 is characterized in that, described silicone oil with low viscosity is a kind of in 100cps silicone oil, the hydroxy silicon oil or both mixing.
5. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 1 is characterized in that, described filler is one or more the mixture in white carbon black, silica powder, diatomite, silicon powder, lime carbonate, the kaolin.
6. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 1 is characterized in that, described deep layer curing catalyst is the phosphatic aqueous solution.
7. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 6 is characterized in that, described phosphatic aqueous solution weight percent concentration is 0.1-0.4%.
8. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 1 is characterized in that, linking agent is the polyfunctional group organosilicon cross-linking agent among the described component B.
9. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 8, it is characterized in that described polyfunctional group organosilicon cross-linking agent is wherein one or more the mixing of methyltrimethoxy silane, Union carbide A-162, tetraethoxysilane, dimethyldiethoxysilane, vinyltriethoxysilane, vinyltrimethoxy silane.
10. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 1 is characterized in that, described coupling agent is an organo-silicon coupling agent.
11. high-strength condensed type double-component organosilicon acid-resisting sealant according to claim 10, it is characterized in that described organo-silicon coupling agent is wherein one or more the mixture of β-aminoethyl-γ-aminopropyl-triethoxyl silane or its dipolymer, γ-glycidoxypropyltrime,hoxysilane, γ-(methacryloxy) propyl trimethoxy silicane.
12. a method for preparing the described high-strength condensed type double-component organosilicon acid-resisting sealant of claim 1 is characterized in that, may further comprise the steps:
Step 1: count by weight, with 100 part of 107 silicon rubber, 0-10 part pigment and 5-15 part softening agent mixing and stirring, add 60-150 part filler under the normal temperature, mix at 60 ℃-80 ℃, the cooling back adds 0.1-1.5 part deep layer curing catalyst, obtains the A component;
Step 2: count by weight, with 30-50 part linking agent, 5-15 part coupling agent and the mixing of 0.4-1.0 part dibutyl tin laurate obtain the B component;
Step 3: during use, the B component that A component that step 1 is prepared and step 2 prepare by weight proportion 100: 5-10 mixes the back deaeration, solidifies to obtain high-strength condensed type double-component organosilicon acid-resisting sealant.
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| CN102304345A (en) * | 2011-08-25 | 2012-01-04 | 文仁光 | Composition of double-component organosilicon photovoltaic component sealant, and preparation method thereof |
| CN102373031A (en) * | 2010-09-20 | 2012-03-14 | 广州市回天精细化工有限公司 | Condensed type bi-component organosilicon structure rubber composition |
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| CN102304345B (en) * | 2011-08-25 | 2013-08-14 | 文仁光 | Composition of double-component organosilicon photovoltaic component sealant, and preparation method thereof |
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| CN102504755A (en) * | 2011-12-02 | 2012-06-20 | 北京天山新材料技术股份有限公司 | Epoxy resin modified two-component silicone rubber adhesive |
| CN102977841A (en) * | 2012-12-31 | 2013-03-20 | 上海回天化工新材料有限公司 | New-energy rapid curing dual-component sealing silica gel capable of being subjected to rapid online high-pressure air-tightness test and preparation method of dual-component sealing silica gel |
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| CN109679573A (en) * | 2019-01-07 | 2019-04-26 | 上海灼日新材料科技有限公司 | A kind of anti-acid organosilicon sealant and preparation method thereof |
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