CN103361023A - Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof - Google Patents
Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a transparent dealcoholized single-component RTV silicone rubber sealant and a preparation method thereof. The preparation method comprises the following steps: stirring 100 parts by mass of alpha, omega-dihydroxyl polydimethylsiloxane, 3 to 10 parts by mass of dimethicone, 5 to 10 parts by mass of a reinforcing filling material and 1 to 5 parts by mass of a hydroxyl radical scavenger under vacuum in a power mixer; then adding 0.3 to 2 parts of a coupling agent and carrying out stirring under vacuum; and adding 1 to 10 parts of a cross-linking agent and 0.1 to 3 parts of a catalyst and carrying out stirring under vacuum and packaging so as to obtain a finished product. The sealant provided by the invention has the advantages of yellowing resistance, a fast curing speed, no toxicity, environment friendliness, etc.
Description
Technical field
The present invention relates to the silicon rubber preparing technical field, be specifically related to a kind of transparent dealcoholizing-type single-component RTV silicon rubber sealant and preparation method thereof.
Background technology
High speed development along with electric, building and Aviation Industry, the room temperature silicone sulphurated siliastic because have neutral character, to advantages such as base material non-corrosiveness, nontoxic, strong adaptability and cost value are lower, enjoy sector application and investigator's favor and obtain develop rapidly.Simultaneously, single-component room-temperature vulcanized silicone rubber (RTV) namely at room temperature need not to add other component namely curable, easy to use, solidify post-shrinkage ratio little, good to most of material adhesive performances, have good anti-electrical insulating property, weathering resistance, flexible resistance, high thermal resistance and ageing resistance etc.At industrial circles such as building, electronics, automobile makings very widely application is arranged, its development prospect is considerable.
CN102757647A discloses a kind of single component catalysis dealcoholized type room temperature vulcanized silicone rubber seal gum, it comprises according to weight part: 100 parts of α, alpha, omega-dihydroxy polydimethyl siloxane, 10～450 parts of functional stuffings, 0.4～20 part of linking agent, 0.1～8 part of coupling agent, 0.1～12 part of catalyzer.This invention also relates to a kind of preparation method of described single component catalysis dealcoholized type room temperature vulcanized silicone rubber seal gum, comprising: the preparation of base-material: with α, alpha, omega-dihydroxy polydimethyl siloxane and filler dehydration blend obtain base-material; Get base-material, stir at vacuum state, add linking agent, stir at vacuum state; Add coupling agent, stir; Add catalyzer, vacuumize, pass into rare gas element, stir, vacuumize, stir, get final product to get finished product.
CN102757759A discloses a kind of single-component dealcoholization-type RTV silicon rubber sealant, wherein base-material comprises by weight: α, 100 parts of alpha, omega-dihydroxy polydimethyl siloxanes, 1～150 part in softening agent, 1～150 part of nano level reinforced filling, 0.1～20 part of hydroxyl scavenging agent, finished product comprises by weight: 100 parts of base-materials, 0.1～30 part of linking agent, 0.1～8 part of coupling agent.The preparation method of described single-component dealcoholization-type RTV silicon rubber sealant comprises: with α, and alpha, omega-dihydroxy polydimethyl siloxane, softening agent, nano level reinforced filling and hydroxyl scavenging agent, the dehydration blend obtains base-material; Get base-material, vacuumize, stir, add linking agent, vacuumize, stir; Add coupling agent, vacuumize, stir, obtain finished product.This invention advantage is: the employing nano material is filler, and adds softening agent, makes product that good physicals be arranged; Add the silane treatment Nano filling, prolong the seal gum shelf lives.
But disclosed RTV silicon rubber sealant does not all relate to its yellowing resistance energy in the prior art, and curing speed is slow.
Summary of the invention
For problems of the prior art, one of purpose of the present invention is to provide a kind of transparent dealcoholizing-type single-component RTV silicon rubber sealant, and the yellowing resistance of described RTV silicon rubber sealant can be excellent, and curing speed is fast, asepsis environment-protecting.
In order to achieve the above object, the present invention has adopted following technical scheme:
A kind of transparent dealcoholizing-type single-component RTV silicon rubber sealant, described RTV silicon rubber sealant comprises following raw material by mass parts:
The mass parts of described dimethyl silicone oil for example is 3.4 parts, 3.8 parts, 4.2 parts, 4.8 parts, 5.2 parts, 5.6 parts, 6 parts, 6.4 parts, 6.8 parts, 7.2 parts, 7.6 parts, 8 parts, 8.4 parts, 8.8 parts, 9.2 parts or 9.6 parts.
The mass parts of described reinforced filling for example is 5.2 parts, 5.6 parts, 6 parts, 6.4 parts, 6.8 parts, 7.2 parts, 7.6 parts, 8 parts, 8.4 parts, 8.8 parts, 9.2 parts, 9.6 parts or 9.8 parts.
The mass parts of described hydroxyl scavenging agent for example is 1.2 parts, 1.6 parts, 2 parts, 2.4 parts, 2.8 parts, 3.2 parts, 3.6 parts, 4 parts, 4.4 parts, 4.6 parts or 4.8 parts.
The mass parts of described coupling agent for example is 0.4 part, 0.6 part, 0.8 part, 1 part, 1.2 parts, 1.4 parts, 1.6 parts or 1.8 parts.
The mass parts of described linking agent for example is 1.4 parts, 1.8 parts, 2.2 parts, 2.7 parts, 3.2 parts, 3.7 parts, 4.2 parts, 4.7 parts, 5.2 parts, 5.7 parts, 6.3 parts, 6.8 parts, 7.5 parts, 8.1 parts, 8.6 parts, 9.1 parts or 9.7 parts.
The mass parts of described catalyzer for example is 0.4 part, 0.6 part, 0.8 part, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts or 2.8 parts.
Preferably, described RTV silicon rubber sealant comprises following raw material by mass parts:
Preferably, described RTV silicon rubber sealant comprises following raw material by mass parts:
Preferably, described α, alpha, omega-dihydroxy polydimethyl siloxane is that kinetic viscosity is the α of 1500～50000cps, the combination of any one in the alpha, omega-dihydroxy polydimethyl siloxane or at least two kinds, preferred kinetic viscosity is the α of 2000～45000cps, the combination of any one in the alpha, omega-dihydroxy polydimethyl siloxane or at least two kinds, further preferred kinetic viscosity is the α of 3000～40000cps, the combination of any one in the alpha, omega-dihydroxy polydimethyl siloxane or at least two kinds.Described α, alpha, omega-dihydroxy polydimethyl siloxane for example is the α of 2500cps for kinetic viscosity, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity is the α of 3500cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity is the α of 5000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity is the α of 8000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity are the α of 12000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity is the α of 22000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity are the α of 30000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity is the α of 36000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity are the α of 42000cps, alpha, omega-dihydroxy polydimethyl siloxane, kinetic viscosity is the α of 48000cps, alpha, omega-dihydroxy polydimethyl siloxane.
Preferably, described dimethyl silicone oil is that kinetic viscosity is the mixture of any one or at least two kinds in the dimethyl silicone oil of 50～500cps, preferred kinetic viscosity is the mixture of any one or at least two kinds in the dimethyl silicone oil of 60～480cps, the mixture of any one in the dimethyl silicone oil that further preferred kinetic viscosity is 70～450cps or at least two kinds.Described dimethyl silicone oil for example is the dimethyl silicone oil of 55cps for kinetic viscosity, kinetic viscosity is the dimethyl silicone oil of 75cps, kinetic viscosity is the dimethyl silicone oil of 105cps, kinetic viscosity is the dimethyl silicone oil of 125cps, kinetic viscosity is the dimethyl silicone oil of 180cps, and kinetic viscosity is the dimethyl silicone oil of 270cps, and kinetic viscosity is the dimethyl silicone oil of 350cps, kinetic viscosity is the dimethyl silicone oil of 420cps, and kinetic viscosity is the dimethyl silicone oil of 480cps.
Preferably, described reinforced filling is that the hydrophilic gas-phase silica is or/and precipitated silica.
Preferably, described hydroxyl scavenging agent is hexamethyldisilazane.
Preferably, described coupling agent is selected from the mixture of any one or at least two kinds in γ-aminopropyl triethoxysilane, γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane, vinyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane or γ-(methacryloxypropyl) propyl trimethoxy silicane.Described mixture is the mixture of γ-(methacryloxypropyl) propyl trimethoxy silicane and N-aminoethyl-γ-aminopropyltrimethoxysilane for example, N-aminoethyl-γ-aminopropyltrimethoxysilane and γ-(2,3-epoxy the third oxygen) mixture of propyl trimethoxy silicane, γ-(2,3-epoxy the third oxygen) mixture of propyl trimethoxy silicane and vinyltriethoxysilane, the mixture of vinyltriethoxysilane and γ-aminopropyl triethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, N-aminoethyl-γ-aminopropyltrimethoxysilane and γ-(2,3-epoxy the third oxygen) mixture of propyl trimethoxy silicane, vinyltriethoxysilane, the mixture of γ-aminopropyl triethoxysilane and N-aminoethyl-γ-aminopropyltrimethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, N-aminoethyl-γ-aminopropyltrimethoxysilane, γ-(2,3-epoxy the third oxygen) mixture of propyl trimethoxy silicane and vinyltriethoxysilane, γ-aminopropyl triethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, N-aminoethyl-γ-aminopropyltrimethoxysilane, the mixture of γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane and vinyltriethoxysilane.
Preferably, described linking agent is selected from the mixture of any one or at least two kinds in tetraethoxy, methyl silicate, vinyltrimethoxy silane, methyltrimethoxy silane or the vinyltriethoxysilane.Described mixture is the mixture of vinyltriethoxysilane and methyltrimethoxy silane for example, the mixture of methyltrimethoxy silane and vinyltrimethoxy silane, the mixture of vinyltrimethoxy silane and methyl silicate, the mixture of methyl silicate and tetraethoxy, the mixture of tetraethoxy and vinyltriethoxysilane, methyltrimethoxy silane, the mixture of vinyltrimethoxy silane and methyl silicate, methyl silicate, the mixture of tetraethoxy and vinyltriethoxysilane, vinyltriethoxysilane, methyltrimethoxy silane, the mixture of vinyltrimethoxy silane and methyl silicate, tetraethoxy, vinyltriethoxysilane, the mixture of methyltrimethoxy silane and vinyltrimethoxy silane, vinyltriethoxysilane, methyltrimethoxy silane, vinyltrimethoxy silane, the mixture of methyl silicate and tetraethoxy.
Preferably, described catalyzer is that the diethylin Union carbide A-162 is or/and anilinomethyl triethoxysilane.
Two of purpose of the present invention is to provide a kind of preparation method of aforesaid transparent dealcoholizing-type single-component RTV silicon rubber sealant, and described method comprises the steps:
(1) with the α of formula ratio, alpha, omega-dihydroxy polydimethyl siloxane, dimethyl silicone oil, reinforced filling and hydroxyl scavenging agent vacuum stirring in power mixer;
(2) coupling agent of adding formula ratio, vacuum stirring;
(3) linking agent and the catalyzer of adding formula ratio, vacuum stirring, discharging, packing obtains transparent dealcoholizing-type single-component RTV silicon rubber sealant.
Compared with prior art, the present invention has following beneficial effect:
Transparent dealcoholizing-type single-component RTV silicon rubber sealant of the present invention has excellent yellowing resistance energy, after described seal gum is extruded discharging from sebific duct, puts into 120 ℃ of baking ovens, and 24 hours non-yellowing at once; The self-vulcanizing of sealing glue was tested under 85 ℃ of temperature and humidity 85% condition after 24 hours, and 300 hours non-yellowing.
The curing speed of transparent dealcoholizing-type single-component RTV silicon rubber sealant of the present invention is fast, asepsis environment-protecting, and the curing speed result is as follows: under 25 ℃ of temperature, humidity 65% condition, solidified 1 millimeter in 2 hours, solidified 2 millimeters in 12 hours.
Embodiment
For the present invention is described better, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
Embodiment 1
A kind of transparent dealcoholizing-type single-component RTV silicon rubber sealant, described RTV silicon rubber sealant comprises following raw material by mass parts:
Described α, alpha, omega-dihydroxy polydimethyl siloxane is that kinetic viscosity is the α of 1500cps, alpha, omega-dihydroxy polydimethyl siloxane, described dimethyl silicone oil is that kinetic viscosity is the dimethyl silicone oil of 50cps, described reinforced filling is the hydrophilic gas-phase silica, and described hydroxyl scavenging agent is hexamethyldisilazane, and described coupling agent is γ-aminopropyl triethoxysilane, described linking agent is tetraethoxy, and described catalyzer is the diethylin Union carbide A-162.
The preparation method of above-mentioned transparent dealcoholizing-type single-component RTV silicon rubber sealant is as follows:
(1) with the α of formula ratio, alpha, omega-dihydroxy polydimethyl siloxane, dimethyl silicone oil, reinforced filling and hydroxyl scavenging agent vacuum stirring in power mixer;
(2) coupling agent of adding formula ratio, vacuum stirring;
(3) linking agent and the catalyzer of adding formula ratio, vacuum stirring, discharging, packing obtains transparent dealcoholizing-type single-component RTV silicon rubber sealant.
Embodiment 2
A kind of transparent dealcoholizing-type single-component RTV silicon rubber sealant, described RTV silicon rubber sealant comprises following raw material by mass parts:
Described α, alpha, omega-dihydroxy polydimethyl siloxane is that kinetic viscosity is the α of 50000cps, alpha, omega-dihydroxy polydimethyl siloxane, described dimethyl silicone oil is that kinetic viscosity is the dimethyl silicone oil of 500cps, described reinforced filling is precipitated silica, described hydroxyl scavenging agent is hexamethyldisilazane, described coupling agent is γ-aminopropyl triethoxysilane and γ-(2,3-epoxy the third oxygen) mixture of propyl trimethoxy silicane, described linking agent is the mixture of positive methyltrimethoxy silane and vinyltriethoxysilane, and described catalyzer is anilinomethyl triethoxysilane.
The preparation method of above-mentioned transparent dealcoholizing-type single-component RTV silicon rubber sealant comprises the steps:
(1) with the α of formula ratio, alpha, omega-dihydroxy polydimethyl siloxane, dimethyl silicone oil, reinforced filling and hydroxyl scavenging agent vacuum stirring in power mixer;
(2) coupling agent of adding formula ratio, vacuum stirring;
(3) linking agent and the catalyzer of adding formula ratio, vacuum stirring, discharging, packing obtains transparent dealcoholizing-type single-component RTV silicon rubber sealant.
Embodiment 3
A kind of transparent dealcoholizing-type single-component RTV silicon rubber sealant, described RTV silicon rubber sealant comprises following raw material by mass parts:
Described α, alpha, omega-dihydroxy polydimethyl siloxane is that kinetic viscosity is the α of 26000cps, alpha, omega-dihydroxy polydimethyl siloxane, described dimethyl silicone oil is that kinetic viscosity is the dimethyl silicone oil of 340cps, described reinforced filling is hydrophilic gas-phase silica and precipitated silica, described hydroxyl scavenging agent is hexamethyldisilazane, described coupling agent is γ-aminopropyl triethoxysilane and γ-(2,3-epoxy the third oxygen) mixture of propyl trimethoxy silicane, described linking agent is tetraethoxy, the mixture of methyl silicate and vinyltrimethoxy silane, described catalyzer are diethylin Union carbide A-162 and anilinomethyl triethoxysilane.
The preparation method of above-mentioned transparent dealcoholizing-type single-component RTV silicon rubber sealant, described method comprises the steps:
(1) with the α of formula ratio, alpha, omega-dihydroxy polydimethyl siloxane, dimethyl silicone oil, reinforced filling and hydroxyl scavenging agent vacuum stirring in power mixer;
(2) coupling agent of adding formula ratio, vacuum stirring;
(3) linking agent and the catalyzer of adding formula ratio, vacuum stirring, discharging, packing obtains transparent dealcoholizing-type single-component RTV silicon rubber sealant.
The transparent dealcoholizing-type single-component RTV silicon rubber sealant that the present invention is obtained carries out yellowing resistance can be tested, and the result is as follows:
Test before solidifying: after seal gum is extruded discharging from sebific duct, put into 120 ℃ of baking ovens, 24 hours non-yellowing at once.
Test after solidifying: the seal gum self-vulcanizing was tested under 85 ℃ of temperature and humidity 85% condition after 24 hours, and 300 hours non-yellowing.
The curing speed test result is as follows: under 25 ℃ of temperature, humidity 65% condition, solidified 1 millimeter in 2 hours, solidified 2 millimeters in 12 hours.
Should be noted that and understand, in the situation that do not break away from the desired the spirit and scope of the present invention of accompanying claim, can make to the present invention of foregoing detailed description various modifications and improvement.Therefore, the scope of claimed technical scheme is not subjected to the restriction of given any specific exemplary teachings.
Applicant's statement, the present invention illustrates method detailed of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned method detailed, does not mean that namely the present invention must rely on above-mentioned method detailed and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (10)
1. a transparent dealcoholizing-type single-component RTV silicon rubber sealant is characterized in that, described RTV silicon rubber sealant comprises following raw material by mass parts:
2. seal gum as claimed in claim 1 is characterized in that, described RTV silicon rubber sealant comprises following raw material by mass parts:
3. seal gum as claimed in claim 1 or 2 is characterized in that, described RTV silicon rubber sealant comprises following raw material by mass parts:
4. such as the described seal gum of one of claim 1-3, it is characterized in that, described α, alpha, omega-dihydroxy polydimethyl siloxane is that kinetic viscosity is the α of 1500～50000cps, the combination of any one in the alpha, omega-dihydroxy polydimethyl siloxane or at least two kinds, preferred kinetic viscosity is the α of 2000～45000cps, the combination of any one in the alpha, omega-dihydroxy polydimethyl siloxane or at least two kinds, further preferred kinetic viscosity is the α of 3000～40000cps, the combination of any one in the alpha, omega-dihydroxy polydimethyl siloxane or at least two kinds.
5. such as the described seal gum of one of claim 1-4, it is characterized in that, described dimethyl silicone oil is that kinetic viscosity is the mixture of any one or at least two kinds in the dimethyl silicone oil of 50～500cps, preferred kinetic viscosity is the mixture of any one or at least two kinds in the dimethyl silicone oil of 60～480cps, the mixture of any one in the dimethyl silicone oil that further preferred kinetic viscosity is 70～450cps or at least two kinds.
6. such as the described seal gum of one of claim 1-5, it is characterized in that, described reinforced filling is that the hydrophilic gas-phase silica is or/and precipitated silica;
Preferably, described hydroxyl scavenging agent is hexamethyldisilazane.
7. such as the described seal gum of one of claim 1-6, it is characterized in that, described coupling agent is selected from the mixture of any one or at least two kinds in γ-aminopropyl triethoxysilane, γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane, vinyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane or γ-(methacryloxypropyl) propyl trimethoxy silicane.
8. such as the described seal gum of one of claim 1-7, it is characterized in that, described linking agent is selected from the mixture of any one or at least two kinds in tetraethoxy, methyl silicate, vinyltrimethoxy silane, methyltrimethoxy silane or the vinyltriethoxysilane.
9. such as the described seal gum of one of claim 1-8, it is characterized in that, described catalyzer is that the diethylin Union carbide A-162 is or/and anilinomethyl triethoxysilane.
10. the preparation method such as the described transparent dealcoholizing-type single-component RTV silicon rubber sealant of one of claim 1-9 is characterized in that, described method comprises the steps:
(1) with the α of formula ratio, alpha, omega-dihydroxy polydimethyl siloxane, dimethyl silicone oil, reinforced filling and hydroxyl scavenging agent vacuum stirring in power mixer;
(2) coupling agent of adding formula ratio, vacuum stirring;
(3) linking agent and the catalyzer of adding formula ratio, vacuum stirring, discharging, packing obtains transparent dealcoholizing-type single-component RTV silicon rubber sealant.
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| CN103725247A (en) * | 2013-11-15 | 2014-04-16 | 安徽淮化股份有限公司 | Room-temperature-curing silica gel adhesive |
| WO2015096172A1 (en) * | 2013-12-24 | 2015-07-02 | 袁志贤 | Room temperature-cured mono-component high-temperature-resistant silica gel and preparation method therefor |
| CN105176481A (en) * | 2015-10-08 | 2015-12-23 | 中国航空工业集团公司北京航空材料研究院 | High-conductivity organosilicone sealant based on single-component room temperature curing condensation and preparation method of high-conductivity organosilicone sealant |
| CN105178034A (en) * | 2015-11-04 | 2015-12-23 | 佛山市幸多新材料有限公司 | Single-component textile printing organic silica gel and preparation method thereof |
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| CN103725247A (en) * | 2013-11-15 | 2014-04-16 | 安徽淮化股份有限公司 | Room-temperature-curing silica gel adhesive |
| WO2015096172A1 (en) * | 2013-12-24 | 2015-07-02 | 袁志贤 | Room temperature-cured mono-component high-temperature-resistant silica gel and preparation method therefor |
| CN105176481A (en) * | 2015-10-08 | 2015-12-23 | 中国航空工业集团公司北京航空材料研究院 | High-conductivity organosilicone sealant based on single-component room temperature curing condensation and preparation method of high-conductivity organosilicone sealant |
| CN105178034A (en) * | 2015-11-04 | 2015-12-23 | 佛山市幸多新材料有限公司 | Single-component textile printing organic silica gel and preparation method thereof |
| CN106854366A (en) * | 2015-12-09 | 2017-06-16 | 江苏天辰新材料股份有限公司 | A kind of preparation method for storing stabilization dealcoholized type one-pack RTV silicone rubber |
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