CN103834353A - High-strength single-component room temperature vulcanized silicone rubber - Google Patents
High-strength single-component room temperature vulcanized silicone rubber Download PDFInfo
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- CN103834353A CN103834353A CN201210477923.7A CN201210477923A CN103834353A CN 103834353 A CN103834353 A CN 103834353A CN 201210477923 A CN201210477923 A CN 201210477923A CN 103834353 A CN103834353 A CN 103834353A
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- silicone rubber
- temperature vulcanized
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- vulcanized silicone
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Abstract
The invention discloses a high-strength single-component room temperature vulcanized silicone rubber, which belongs to the technical field of single-component room temperature vulcanized silicone rubber sealants, and mainly solves the problem that the tensile strength of organosilicone rubber in the prior art is low (less than 2MPa). The high-strength single-component room temperature vulcanized silicone rubber is mainly characterized by comprising (a) 100 parts of hydroxyl-terminated poly (dimethyl siloxane) polymer; (b) 90-150 parts of a reinforcing filler; (c) 4-10 parts of a thixotropic agent; (d) 15-33 parts of a silicone oil plasticizer; (e) 6-14 parts of a crosslinking agent; (f) 1.7-4 parts of a coupling agent; (g) 0-2.5 parts of a catalyst; and (h) 0.3-3 parts of a pigment. The tensile strength of the high-strength single-component room temperature vulcanized silicone rubber can reach above 3.0MPa, the elongation at break of is greater than 400%, the aluminum sheet, steel sheet adhesion force can reach 2.0Mpa, and the high-strength single-component room temperature vulcanized silicone rubber has the features of being simple in preparation process, low in cost, and easy to use.
Description
Technical field
The invention belongs to single-component room-temperature vulcanized silicone rubber sealing agent technical field, be specifically related to a kind of single-component room-temperature vulcanized silicone rubber sealing agent of high tensile.
Background technology
Organo-silicone rubber has excellent weathering resistance, resistant of high or low temperature, hydrophobicity and the good ventilation property etc. of height, and can be within the scope of-60～200 ℃ life-time service, safe and reliable, long service life, is therefore widely used in the industrial circles such as building, electronics, machinofacture, automobile.Organo-silicone rubber development is in recent years very fast, but in use also exposes some shortcomings part, as poor in tensile strength, adhesive power and chemical-resistant etc., thereby has limited its range of application.In general, room temperature vulcanized silicone rubber good toughness, elongation is high, but tensile strength is lower, without the only 0.6MPa left and right of tensile strength of the room temperature vulcanized silicone rubber of filler reinforcement, also rises to only 1.5 ~ 2 MPa through filler reinforcement back draft intensity.The present invention develops a kind of high tensile single-component room-temperature vulcanized silicone rubber, compared with existing room temperature vulcanized silicone rubber sealing agent, physical strength has had significantly lifting, more than tensile strength can reach 3.0MPa, elongation at break is greater than 400%, can reach 2.0MPa to the bonding force of aluminium flake, steel disc.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of high tensile single-component room-temperature vulcanized silicone rubber sealing agent.Be characterized in preparing more than a kind of tensile strength can reach 3.0MPa the single-component room-temperature vulcanized silicone rubber sealing agent that elongation at break is greater than 400%.
For realizing above-mentioned technical purpose, technical solution of the present invention is: a kind of high tensile single-component room-temperature vulcanized silicone rubber, it is characterized in that comprising (a)～(h) component, and each component is as follows by weight:
(a) 100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
(b) 90～150 parts of reinforced fillings;
(c) 4～10 parts of thixotropic agent;
(d) 15～33 parts, silicone oil softening agent;
(e) 6～14 parts of linking agents;
(f) 1.7～4 parts of coupling agents;
(g) 0～2.5 part of catalyzer;
(h) 0.3～3 part of pigment.
Above-mentioned (a) component hydroxyl-terminated injecting two methyl siloxane polymkeric substance, molecular formula is HO-[MeRSiO]
n-OH(R is Me, CF3CH2CH2, Ph; N=100 ~ 2000), at 25 ℃, average viscosity is at 2000～50000 mPas.
Above-mentioned (b) component reinforced filling is the nanometer grade calcium carbonate through surface hydrophobicity processing, 400 ~ 1250 order talcum powder, 800 ~ 2000 order kaolin, one or more in 1250 order silicon powders.
Above-mentioned (c) component thixotropic agent is that specific surface area is 150～230 cm
3the gas-phase silica of/g.
Above-mentioned (d) component silicone oil softening agent is that molecular end is the polymethyl siloxane of methyl, and molecular formula is Me-[Me
2siO]
n-Me, the average viscosity at 25 ℃ is 100～1000 mPas.
Above-mentioned (e) component linking agent has general formula R for one or more
4-nsi(OR
1)
p(ON=CR
2r
3)
psilane crosslinker, wherein R is saturated, the straight or branched alkyl of 1～8 carbon atom, n is that 0～4, p is 0～3, R
1, R
2, R
3separate saturated, the straight or branched alkane with 1～4 carbon atom.
Above-mentioned (f) component coupling agent is gamma-amino propyl trimethoxy silicane, γ aminopropyltriethoxy silane, divinyl triamino propyl trimethoxy silicane, glycidyl ether oxygen Trimethoxy silane, one or more in methacryloxypropyl trimethoxy silane, are preferably gamma-amino propyl trimethoxy silicane, γ aminopropyltriethoxy silane, one or more in γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane.
Above-mentioned (g) component catalyst is organo-tin compound, monoalkyl organo-tin compound, dialkyl group organo-tin compound, trialkyl organo-tin compound, one or more in tetraalkyl organo-tin compound and their inner complex.
The preparation method of above-mentioned high tensile single-component room-temperature vulcanized silicone rubber sealing agent, includes following steps composition:
The first step is by 100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance, 90 ~ 150 parts of reinforced fillings, 4～10 parts of thixotropic agent, 15～33 parts, silicone oil softening agent, 0.3 ~ 3 part of pigment adds in high speed dispersor, in 100～150 ℃ of temperature, the blend of dewatering under the condition of be greater than-0.09MPa of vacuum tightness, 60～200 minutes cooling base-materials that obtain of high-speed stirring;
At room temperature, nitrogen protection adds 6～14 parts of linking agents to second step successively, 1.7～4 parts of coupling agents, and 0.1～2.5 part of catalyzer, stirs under the condition of be greater than-0.09MPa within 30～60 minutes, make high strength single-component room-temperature vulcanized silicone rubber sealing agent in vacuum tightness.
Performance test methods of the present invention is as follows:
Cementability test: material is aluminium flake, is applied to glue by sticky test piece surface, then by two test pieces to folded, bond area is 20mm*5mm, 23 ± 2 ℃ of standard conditions, relative humidity 50 ± 5% times curing 7 days, tests shearing resistance according to GB/T 7124.
Surface drying time test: 23 ± 2 ℃ of temperature, under relative humidity 50 ± 5% conditions, glue is extruded into plastic film surface, thickness is 2～3mm approximately, length >100mm, every 1 minute, with finger touch glue-line to glue no longer touch with one's hand refer to till, record from be expressed into do not touch with one's hand refer to time be surface drying time.
Tensile strength and test of elongation rate: glue is made in tetrafluoroethylene mould to the film of 3.0 ± 0.1 mm, 23 ± 2 ℃ of temperature, under relative humidity 50 ± 5% conditions, solidified 7 days, then test according to GB528.
The invention has the beneficial effects as follows:
1, compared with existing room temperature vulcanized silicone rubber sealing agent, physical strength has had significantly lifting, and more than tensile strength can reach 3.0MPa, elongation at break is greater than 400%, can reach 2.0Mpa to the bonding force of aluminium flake, steel disc.
2, preparation technology is simple, with low cost, easy to use.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated, but the present invention is not limited thereto.
Embodiment 1 selects viscosity 20000mPas hydroxyl-terminated injecting two methyl siloxane, viscosity 1000mPas dimethyl silicone oil, and its component is as follows:
100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
60 parts of nano-calcium carbonates;
37 parts of kaolin (2000 order);
12 parts of talcum powder (600 order);
4 parts of gas-phase silicas;
33 parts, silicone oil softening agent;
3 parts of pigment;
3 parts of vinyl tributyl ketoximyl silanes;
Four 7 parts of Diacetylmonoxime base silanes;
γ-1 part of (2,3-epoxy the third oxygen) propyl trimethoxy silicane.
Embodiment 2 selects viscosity 5000mPas hydroxyl-terminated injecting two methyl siloxane, viscosity 1000mPas dimethyl silicone oil, and its component is as follows:
100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
40 parts of kaolin (2000 order);
59 parts of talcum powder (400 order);
6 parts of gas-phase silicas;
33 parts, silicone oil softening agent;
3 parts of pigment;
3 parts of vinyl tributyl ketoximyl silanes;
3 parts of methyl tributanoximo silanes;
γ-1.7 parts of (2,3-epoxy the third oxygen) propyl trimethoxy silicanes;
0.4 part of dibutyl tin laurate.
Embodiment 3 selects viscosity 20000mPas and 50000mPas hydroxyl-terminated injecting two methyl siloxane, viscosity 100mPas dimethyl silicone oil, and its component is as follows:
50 parts, 20000mPas hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
50 parts, 50000mPas hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
Nano-calcium carbonate Ca45 part;
55 parts of kaolin (1250 order);
5 parts of gas-phase silicas;
33 parts, silicone oil softening agent;
3 parts of pigment;
6 parts of methyl tributanoximo silanes;
γ-1.7 parts of (2,3-epoxy the third oxygen) propyl trimethoxy silicanes;
0.5 part of dibutyl tin laurate.
Embodiment 4 selects viscosity 20000mPas hydroxyl-terminated injecting two methyl siloxane, viscosity 1000mPas dimethyl silicone oil, and its component is as follows:
100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
40 parts of nano-calcium carbonates;
60 parts of talcum powder (800 order);
4 parts of gas-phase silicas;
33 parts, silicone oil softening agent;
3 parts of pigment;
4 parts of vinyl tributyl ketoximyl silanes;
4 parts of methyl tributanoximo silanes;
1.7 parts of γ-aminopropyltrimethoxysilanes;
0.4 part of dibutyltin diacetate.
Comparative example 1 is selected viscosity 20000mPa.s hydroxyl-terminated injecting two methyl siloxane, viscosity 100mPa.s dimethyl silicone oil, and its component is as follows:
100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
80 parts of nano-calcium carbonates;
6 parts of gas-phase silicas;
33 parts, silicone oil softening agent;
3 parts of pigment;
5 parts of vinyl tributyl ketoximyl silanes;
Four 5 parts of Diacetylmonoxime base silanes;
γ-1.7 parts of (2,3-epoxy the third oxygen) propyl trimethoxy silicanes.
Claims (8)
1. a high strength single-component room-temperature vulcanized silicone rubber, is characterized in that its composition comprises:
(a) 100 parts, hydroxyl-terminated injecting two methyl siloxane polymkeric substance;
(b) 90～150 parts of reinforced fillings;
(c) 4～10 parts of thixotropic agent;
(d) 15～33 parts, silicone oil softening agent;
(e) 6～14 parts of linking agents;
(f) 1.7～4 parts of coupling agents;
(g) 0～2.5 part of catalyzer;
(h) 0.3～3 part of pigment.
2. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, is characterized in that: described hydroxyl-terminated injecting two methyl siloxane polymkeric substance, molecular formula is HO-[MeRSiO]
n-OH(R is Me, CF3CH2CH2, Ph; N=100 ~ 2000), at 25 ℃, average viscosity is at 2000～50000 mPas.
3. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, it is characterized in that: described reinforced filling is the nanometer grade calcium carbonate through surface hydrophobicity processing, 400 ~ 1250 order talcum powder, 800 ~ 2000 order kaolin, one or more in 1250 order silicon powders.
4. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, is characterized in that: described thixotropic agent is that specific surface area is 150～230 cm
3the gas-phase silica of/g.
5. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, is characterized in that: described silicone oil softening agent is that molecular end is the polymethyl siloxane of methyl, and molecular formula is Me-[Me
2siO]
n-Me, the average viscosity at 25 ℃ is 100～1000 mPas.
6. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, is characterized in that: described linking agent has general formula R for one or more
4-n(SiOR
1)
p(ON=CR
2r
3)
psilane crosslinker, wherein R is saturated, the straight or branched alkyl of 1～8 carbon atom, n is that 0～4, p is 0～3, R
1, R
2, R
3separate saturated, the straight or branched alkyl with 1～4 carbon atom.
7. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, it is characterized in that: described coupling agent is gamma-amino propyl trimethoxy silicane, γ aminopropyltriethoxy silane, divinyl triamino propyl trimethoxy silicane, glycidyl ether oxygen Trimethoxy silane, one or more in methacryloxypropyl trimethoxy silane, be preferably gamma-amino propyl trimethoxy silicane, γ aminopropyltriethoxy silane, one or both in γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane.
8. high strength single-component room-temperature vulcanized silicone rubber according to claim 1, it is characterized in that: described catalyzer is inorganic tin compound, monoalkyl organo-tin compound, dialkyl group organo-tin compound, trialkyl organo-tin compound, one or more in tetraalkyl organo-tin compound and their inner complex.
Priority Applications (1)
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|---|---|---|---|
| CN201210477923.7A CN103834353A (en) | 2012-11-22 | 2012-11-22 | High-strength single-component room temperature vulcanized silicone rubber |
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| CN201210477923.7A CN103834353A (en) | 2012-11-22 | 2012-11-22 | High-strength single-component room temperature vulcanized silicone rubber |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104449549A (en) * | 2014-12-04 | 2015-03-25 | 广州汇纳新材料科技有限公司 | Silicone sealant for asphalt road joints and preparation method thereof |
| CN104830063A (en) * | 2015-03-16 | 2015-08-12 | 芜湖荣基密封系统有限公司 | Anti-tearing and anti-aging silicone rubber slurry used for preparing ultrathin sealing rubber layer and preparation method thereof |
| CN104845581A (en) * | 2015-04-30 | 2015-08-19 | 安徽华雲轻工制造有限公司 | Sealant added with aromatic |
| CN105219340A (en) * | 2015-09-09 | 2016-01-06 | 浙江汇杰有机硅股份有限公司 | Pad glue and preparation method thereof exempted from by a kind of heatproof oil resistant organosilicon |
| CN105255438A (en) * | 2015-11-17 | 2016-01-20 | 湖北回天新材料股份有限公司 | Bisphenol a epoxy resin modified room temperature vulcanized silicone rubber and preparation method thereof |
| CN105440690A (en) * | 2015-12-22 | 2016-03-30 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | 3D printer base material based on bulrush modification, and preparation method thereof |
| CN105693956A (en) * | 2016-03-14 | 2016-06-22 | 苏州莱特复合材料有限公司 | Preparation method of fatigue-resistant fender composite material for fenders |
| CN106833506A (en) * | 2017-02-28 | 2017-06-13 | 东莞优邦材料科技有限公司 | A kind of one component room temperature solidification fluid sealant of resistance to methyl-silicone oil |
| CN109628059A (en) * | 2018-11-14 | 2019-04-16 | 佛山市金德利粘胶有限公司 | A kind of stainless steel silicone sealant and preparation method thereof |
| CN111154412A (en) * | 2020-01-15 | 2020-05-15 | 江苏明昊新材料科技股份有限公司 | Quick-drying silicone adhesive material and preparation method thereof |
| CN111592855A (en) * | 2020-06-30 | 2020-08-28 | 宁波大大防腐材料技术有限公司 | High-temperature elastic weather-resistant adhesive and preparation method and process thereof |
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| CN102533213A (en) * | 2011-12-21 | 2012-07-04 | 烟台德邦科技有限公司 | Room temperature silicon sulfide rubber and preparation method thereof |
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2012
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102533213A (en) * | 2011-12-21 | 2012-07-04 | 烟台德邦科技有限公司 | Room temperature silicon sulfide rubber and preparation method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104449549A (en) * | 2014-12-04 | 2015-03-25 | 广州汇纳新材料科技有限公司 | Silicone sealant for asphalt road joints and preparation method thereof |
| CN104830063A (en) * | 2015-03-16 | 2015-08-12 | 芜湖荣基密封系统有限公司 | Anti-tearing and anti-aging silicone rubber slurry used for preparing ultrathin sealing rubber layer and preparation method thereof |
| CN104845581A (en) * | 2015-04-30 | 2015-08-19 | 安徽华雲轻工制造有限公司 | Sealant added with aromatic |
| CN105219340A (en) * | 2015-09-09 | 2016-01-06 | 浙江汇杰有机硅股份有限公司 | Pad glue and preparation method thereof exempted from by a kind of heatproof oil resistant organosilicon |
| CN105255438B (en) * | 2015-11-17 | 2019-04-02 | 湖北回天新材料股份有限公司 | The modified room temperature vulcanized silicone rubber and preparation method thereof of bisphenol A epoxide resin |
| CN105255438A (en) * | 2015-11-17 | 2016-01-20 | 湖北回天新材料股份有限公司 | Bisphenol a epoxy resin modified room temperature vulcanized silicone rubber and preparation method thereof |
| CN105440690A (en) * | 2015-12-22 | 2016-03-30 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | 3D printer base material based on bulrush modification, and preparation method thereof |
| CN105693956A (en) * | 2016-03-14 | 2016-06-22 | 苏州莱特复合材料有限公司 | Preparation method of fatigue-resistant fender composite material for fenders |
| CN106833506A (en) * | 2017-02-28 | 2017-06-13 | 东莞优邦材料科技有限公司 | A kind of one component room temperature solidification fluid sealant of resistance to methyl-silicone oil |
| CN106833506B (en) * | 2017-02-28 | 2020-04-03 | 东莞优邦材料科技股份有限公司 | Methyl silicone oil-resistant single-component room temperature curing sealant |
| CN109628059A (en) * | 2018-11-14 | 2019-04-16 | 佛山市金德利粘胶有限公司 | A kind of stainless steel silicone sealant and preparation method thereof |
| CN111154412A (en) * | 2020-01-15 | 2020-05-15 | 江苏明昊新材料科技股份有限公司 | Quick-drying silicone adhesive material and preparation method thereof |
| CN111592855A (en) * | 2020-06-30 | 2020-08-28 | 宁波大大防腐材料技术有限公司 | High-temperature elastic weather-resistant adhesive and preparation method and process thereof |
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Application publication date: 20140604 |