CN106634803A - Autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and preparation method thereof - Google Patents
Autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
- C09J183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention relates to autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and a preparation method thereof. The room-temperature vulcanized silicone rubber is prepared from, by mass, 50-100 parts of terminal hydroxyl polydimethylsiloxane, 5-25 parts of filler and 0.3-5 parts of cross-linking agent. The room-temperature vulcanized silicone rubber can be rapidly cured without organo-tin compounds and other catalysts, the cost is reduced, the harm of the used organo-tin compound to the environment and organisms is also avoided, and therefore the application field of the silicone rubber. The room-temperature vulcanized silicone rubber using alpha-amine methyl triethoxysilane as a cross-linking agent is high in curing speed, good in mechanical property and excellent in thermal performance and has the advantages of being free of corrosion, low in energy consumption and free of pollution.
Description
Technical field
The invention belongs to single-component de-alcoholized room temperature vulcanized silicone rubber technical field, and in particular to a kind of dealcoholysis of self-catalysis
Type room-temperature fast-curing silicon rubber and preparation method thereof.
Background technology
Silicon rubber is one of most important synthetic rubber, with excellent weatherability, heat endurance, low-temperature flexibility and electricity absolutely
Edge, is widely used in different fields, such as Aero-Space, electronic apparatus, weaving, building.Room temperature vulcanized silicone rubber is main
As adhesive sealant, Embedding Material and mould.Wherein what consumption was maximum is the sealant of building and decoration market, typically should
It is glass curtain wall with one of occasion.Glass is connect as outer wall material, expansion joint with aluminum alloy frame organosilicon structures are gluing
Then make waterproof sealing with organosilicon.Because building curtain wall is exposed to for a long time in air, it is subjected to expose to the weather, certain sound is carried
Lotus, so very high to every technical property requirements of adhesive used, such as good weather-proof, ageing-resistant, UV resistant, using temperature
Degree is wide, adhesion strength is high, preferable elongation and elastic performance, in addition also rapid curing (the cold curing time was at 30 minutes
Within), the features such as easy to operate.In addition, room temperature vulcanized silicone rubber also serve as Aero-Space, nuclear power station, electronics, machinery,
The encapsulant of automobile and other industries, the Embedding Material of electronic devices and components, grinding tool glue of soft film material etc..Although the need of these kinds
The amount of asking is relatively fewer, but is requisite in many occasions.Room temperature vulcanized silicone rubber is special except having high-temperature silicon disulfide rubber
Levy such as heat resistance, cold resistance, compression set, resistance to ozone, weatherability, electrical characteristic, chemical reagent resistance, water-fast steaming
Gas, radioresistance etc. are outer, it also have be simple to manufacture, easy to use, species is various, widely applicable, can live in-place molding
The advantages of.
Room temperature vulcanized silicone rubber obtained in trifunctional alkoxy silane as crosslinking agent is referred to as dealcoholized type single-component room-temperature
Sulphurated siliastic, its formula is RSi (OR1)3.Due to Dealcoholized One part Room Temperature Vulcanized Silicone Rubber solidification when remove be
Small molecular alcohol accessory substance, odorless, and to metal and other materials without corrosivity, therefore it is electronic component sealing, electricity
Ideal kind is applied in the electronics such as edge, the electrical equipment industry of drawing last breath.The model intensity is high, and curing rate can adjust, caking property
It is good, it is that in the market kind grade at most, applies a more universal class single-component room-temperature vulcanized silicone rubber.
But only with silicon rubber obtained in above-mentioned crosslinking agent in terms of curing performance, it is oversize to show surface drying time, internal
Slow curing.The shortcoming slow in order to solve curing rate, is usually used appropriate catalyst (such as organotin or titanate chelate
Deng) accelerating curing rate.But dealcoholized type silane crosslinker is when in use, additional catalyst is promoting sizing material solidification crosslinking
While also bring many side reactions；A small amount of catalyst is more difficult at short notice in sizing material is uniformly dispersed, now sizing material
Thickening peak occurs, causes encapsulating difficult, also easily occur localized gelling, cross-linking reaction is not thorough enough, and product is easily sent out
Raw xanthochromia；Purity requirement of the catalyst to material is high, and a small amount of impurity is likely to inactivate it；Organo-tin compound is medium poison
Harmful thing, considers for safety with environmentally friendly, the material such as much national strictly restriction or even disabling, more particularly to food and health care
Using when be restricted.Therefore, shorten the hardening time of sizing material and improve the focus that its nonstaining property is always studied.
In organosilicon chemistry, the position of substituent can to some extent affect the stability of organo-silicon compound.Work as replacement
At γ positions, i.e., functional group is separated by 3 carbon atoms, impact very little of the functional group to silicon atom, so this knot to base with silicon atom
The organo-silicon compound of structure are stable.When substituent is on the carbon of β positions, i.e., functional group is separated by 2 carbon atoms with silicon atom, by
In β-effect, easily there is the fracture of silicon-carbon bonds, with H2The reaction rate of O is most fast, and such compound stability is poor.Work as substituent
When on α carbon, i.e., functional group is separated by a carbon atom with silicon atom, and the stability of this kind of compound replaces sense between γ and β
Between two class compounds of group.Although alpha-functional group silane coupler is susceptible to the fracture of silicon-carbon bonds in highly basic, but as long as
During synthesis and use, it is to avoid strongly basic medium, its stability is barely affected；Due to functional group and silicon atom phase
Every a carbon atom, the impact of the electronic effect of functional group to silicon atom is larger, if the P electronics or lone pair electrons in functional group to
Shift on silicon or be conjugated with the d tracks of silicon atom, the facile hydrolysis group being joined directly together with silicon atom will be caused to become more
Silanol is formed to be vivaciously susceptible to hydrolysis, according to the vulcanization crosslinking mechanism of room temperature vulcanized silicone rubber, this will greatly speed up
Cross-linked speed, realization solidifies without room temperature Quick cross-linking under the conditions of extra catalyst.
The dealcoholized type silane crosslinker of commercialization in the market in structure more belongs to γ-functional silanes compound,
As gamma-aminopropyl-triethoxy-silane (KH550), γ -3- (methacryloxypropyl) propyl trimethoxy silicane (KH570), γ -
(oxygen of 2,3- epoxies third) propyl trimethoxy silicane (KH-560) etc..Impact of the substituent on these γ groups to silicon atom compared with
It is little, still need to add catalyst solidify can room temperature vulcanized silicone rubber.
Chinese patent document CN102146208A is prepared for a kind of Transparent Dealcoholizing One Package Room Temperature Vulcanizable Silicone Sealant, except
Base rubber, crosslinking agent, filler etc. are outer to be also added into organic tin catalyst, and this catalyst is medium murder by poisoning thing, limits silicon rubber
The application of glue.Chinese patent document CN105062411A is prepared for a kind of single-component de-alcoholized organosilicon sealant, what is prepared
During add organic titanium compound as catalyst, fall within toxic contaminants material.And if both the above formula is not
Catalyst is added, it is very long that hardening time can become.
The content of the invention
For the deficiencies in the prior art, the present invention provides a kind of dealcoholized type room temperature vulcanized silicone rubber of self-catalysis and its preparation
Method, the dealcoholized type room temperature vulcanized silicone rubber is that the dealcoholized type cross-linking agents replaced based on α bit aminos are synthesized, obtained silicon
The hardening time of rubber is short, excellent performance, can be used to prepare the various organosilicon materials included in the fields such as food and health care
Material.
Technical scheme is as follows：
A kind of dealcoholized type room temperature vulcanized silicone rubber of self-catalysis, including the raw material composition of following mass parts：
Hydroxyl-terminated injecting two methyl siloxane：50～100 parts；Filler：5～25 parts；Crosslinking agent：0.3～5 part.
, according to the invention it is preferred to, the tensile strength of described dealcoholized type room temperature vulcanized silicone rubber is 0.23～
0.67MPa, elongation at break be 204～437%, tearing strength be 1.96～3.62MPa, shore hardness be 34.7～
44.7Shore A。
, according to the invention it is preferred to, described dealcoholized type room temperature vulcanized silicone rubber includes that the raw material of following mass parts is constituted：
Hydroxyl-terminated injecting two methyl siloxane：50～100 parts；Filler：10～20 parts；Crosslinking agent：1～3 part.
, according to the invention it is preferred to, described hydroxyl-terminated injecting two methyl siloxane is α, alpha, omega-dihydroxy polydimethyl silica
Alkane (107 glue)；It is further preferred that the viscosity of described hydroxyl-terminated injecting two methyl siloxane is 1000～8000cSt, molecular weight
For 10000-80000g/mol.
, according to the invention it is preferred to, described filler be fume colloidal silica, precipitated silica, precipitated calcium carbonate or
At least one or two mixture above in powdered whiting；It is further preferred that described precipitated calcium carbonate is nanometer
Activated Calcium carbonate.
, according to the invention it is preferred to, described crosslinking agent is α-amido triethoxysilane；Further preferably, α-(N- is just
Butyl) amine MTES, α-(N, N- diethyl) amine MTES, α-(N, N- di-n-butyl) amine first
Ethyl triethoxy silicane alkane, α-(N- cyclohexyl) amine MTES.The crosslinking agent α of the present invention-ethoxy of amido three
Base silane can be prepared by prior art, can be found in Chinese patent document CN2016108780443.
, according to the invention it is preferred to, described dealcoholized type room temperature vulcanized silicone rubber includes that the raw material of following mass parts is constituted：
α, alpha, omega-dihydroxy polydimethyl siloxane：100 parts；Precipitated silica：15 parts；α-amido triethoxysilane：
2.25 parts.
The present invention also provides the preparation method of above-mentioned dealcoholized type room temperature vulcanized silicone rubber, including step is as follows：
(1) hydroxyl-terminated injecting two methyl siloxane is stirred with filler, in 120～200 DEG C, under vacuum condition, mixing
30～60min, obtains base-material；
(2) base-material is cooled into less than 40 DEG C, adds crosslinking agent, under vacuum condition, stirring mixing 1min～20min, Gu
Change, obtain final product the ketoxime removing type room temperature vulcanized silicone rubber of self-catalysis.
Method produced according to the present invention, it is preferred that the temperature of mixing is 140～160 DEG C in step (1), more preferably 150
℃；
Preferably, the vacuum of described vacuum condition is -0.09～-0.1MPa, more preferably -0.09～-0.095MPa.
, according to the invention it is preferred to, the vacuum of the vacuum condition described in step (2) is -0.09～-0.1MPa, more
It is preferred that -0.09～-0.095MPa.
, according to the invention it is preferred to, the time of described solidification is 1min～20min.
The principle of the present invention：
Present invention uses series α-amine MTES crosslinking agent, its α replacement functional group is on silicon atom impact
Relatively strong, principle is that amido is close apart from silicon atom in α-amine MTES molecule, the P electronic energies wherein on nitrogen-atoms
Enough into the 3d tracks of silicon atom, p- is pi-conjugated for formation, increases the electronegativity on Si, has activated Si-O keys so that it more holds
Easy fracture.Therefore, α-amido triethoxysilane shows good solidification cross-linking properties, possesses the property of self-catalysis.This
It is bright with alpha-position replace amine MTES as crosslinking agent, using urging certainly for α positions substituted amine methyl triethoxysilane
Change property, that is, be not added with the catalyst such as organo-tin compound, obtained dealcoholized type room temperature vulcanized silicone rubber curing rate is relatively fast,
Good mechanical performance and with corrosion-free, low energy consumption, free of contamination feature.Include that food and health care etc. are led suitable for preparing
Various organosilicon materials in domain.
The curing mechanism of the present invention is as follows：
Beneficial effects of the present invention：
1st, the preparation method of the silicon rubber that the present invention is provided, it is not necessary to plus catalyst, and hardening time is short, it is only necessary to 1min～
20min is curable completing.
2nd, room temperature vulcanized silicone rubber deeply-curing prepared by the formula that the present invention is provided is largely increased.
3rd, the silicon rubber that prepared by the present invention is corrosion-free to base materials such as stone material, glass, metals, and cementability is good.
4th, the preparation method that the present invention is provided, energy consumption is low in production process, and three wastes are produced, environmentally friendly pollution-free.
5th, its application has been widened in silicon rubber prepared by the present invention, the impact without catalyst.
6th, the present invention is prepared for a series of Dealcoholized One part Room Temperature Vulcanized Silicone Rubber of different hardening times.What is provided matches somebody with somebody
The crosslinking agent that difference α positions replace in side has different self-catalysis effects.
7th, the silicon rubber heat endurance that prepared by the present invention is good, and tearing strength is higher, up to 1.96～3.62MPa；Fracture is stretched
Long rate is high, up to 204～437%.
Description of the drawings
Fig. 1 is the TGA curves of five kinds of silicon rubber obtained by the present invention.
Fig. 2 is the DTG curves of five kinds of silicon rubber obtained by the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is intended to for explaining the present invention, and can not
It is interpreted as limitation of the present invention.Unreceipted particular technique or condition in embodiment, according to described by document in the art
Technology or condition are carried out according to product description.Agents useful for same or the unreceipted production firm person of instrument, being to pass through
City available from conventional products.
Number used is weight portion in embodiment.
In embodiment, obtained silicon rubber is carried out using Mettler Toledo SDTA-854 types thermogravimetric analyzers
Thermogravimetric analysis, whole process is that heating rate is 20 DEG C/min under nitrogen atmosphere from 100 DEG C to 700 DEG C, and nitrogen flow is
50mL/min。
Embodiment 1
Temperature be 27 DEG C, humidity be 43% under conditions of, by 100 parts of viscosity for 3000cSt α, alpha, omega-dihydroxy poly- two
Methylsiloxane (relative molecular mass 39000g/mol), 15 parts of precipitated silicas are added in planet stirring kettle, are warming up to
150 DEG C, under -0.09～-0.1MPa vacuum conditions 30min is mixed, be cooled to less than 40 DEG C.If sticky (mobility is bad) can
Plus appropriate hexamethylene dilution, 2.25 parts of α-(N- normal-butyls) amine MTES is subsequently adding as crosslinking agent, in-
Bubble-free is stirred until homogeneous under 0.09～-0.1MPa vacuum conditions.Solidification, obtains final product the ketoxime removing type room temperature vulcanized silicon rubber of self-catalysis
Glue.
Horizontal plane is placed in, using GB/T13477.5-2002 Test method for building sealants Part V surface drying times
Fingers-touch method measures its surface drying time for 2'45 in measure ".
The dealcoholized type room temperature vulcanized silicone rubber of the self-catalysis of gained is made into 2 dumbbell shapeds by the regulation of GB/T528-2009
Sample, is resisted after the curing be complete using micro-control electronic universal tester (the new WDW-5 in Changchun) according to GB/T528-2009
Open strength test.Sample tensile strength is 0.23MPa；Elongation at break：392%；Tearing strength is：1.96MPa.
Shore hardness test is carried out according to GB/T531.1-2008 using Shore A durometer (TH220).Sample shore hardness
For 34.7Shore A.
Embodiment 2
By the step of embodiment 1, except for the difference that, crosslinking agent is with 2.25 parts of α-(N- cyclohexyl) amine MTES generation
Replace, the performance test results are as shown in table 1.
Embodiment 3
By the step of embodiment 1, except for the difference that, crosslinking agent α-(N, N- diethyl) amine MTES replaces,
The performance test results are as shown in table 1.
Embodiment 4
By the step of embodiment 1, except for the difference that, crosslinking agent α-(N, N- di-n-butyl) amine MTES generation
Replace, the performance test results are as shown in table 1.
Embodiment 5
By the step of embodiment 1, except for the difference that, precipitated silica addition is 5 parts.
Embodiment 6
By the step of embodiment 1, except for the difference that, precipitated silica addition is 25 parts.
Embodiment 7
By the step of embodiment 2, except for the difference that, nm-class active calcium carbonate substitutes precipitated silica, and addition is 10 parts.
Embodiment 8
By the step of embodiment 2, except for the difference that, it is 20 parts that fume colloidal silica substitutes precipitated silica addition.
Embodiment 9
By the step of embodiment 3, except for the difference that, α-(N, N- diethyl) amine MTES addition is 1 part.
Embodiment 10
By the step of embodiment 3, except for the difference that, α-(N, N- diethyl) amine MTES addition is 3 parts.
Embodiment 11
By the step of embodiment 4, except for the difference that, α-(N, N- di-n-butyl) amine MTES addition is 0.3
Part.
Embodiment 12
By the step of embodiment 4, except for the difference that, α-(N, N- di-n-butyl) amine MTES addition is 5 parts.
Comparative example 1
Temperature be 27 DEG C, humidity be 4% under conditions of, by 100 parts of viscosity for 3000cSt α, alpha, omega-dihydroxy poly- two
Methylsiloxane (relative molecular mass 39000g/mol), 15 parts of precipitated silicas are added in planet stirring kettle, are warming up to
150 DEG C, under -0.09～-0.1MPa vacuum conditions 30min is mixed, be cooled to less than 40 DEG C.If sticky (mobility is bad) can
Plus appropriate hexamethylene dilution, 2.25 parts of commercially available KH550 are subsequently adding as crosslinking agent, and quickly instill 0.5 part of catalyst (two
Dibutyl tin laurate), bubble-free is stirred until homogeneous under -0.09～-0.1MPa vacuum conditions, it is placed in horizontal plane.Performance is surveyed
Examination is carried out by the step of embodiment 1, as a result such as table 1
Table 1
By analyzing embodiment 1, embodiment 2, embodiment 3, embodiment 4 and the result of comparative example 1, can significantly send out
Existing α-amido triethoxysilane makees silicon rubber obtained in crosslinking agent and is better than commercially available crosslinking agent in very many performances
(KH550) silicon rubber obtained by.
Than if any shorter hardening time, larger hardness, larger tearing strength and longer elongation at break, and
It is contemplated that when crosslinking agent is commercially available KH550, additionally to add organotin catalysts, the application and dirt of silicon rubber are limited
Dye is serious.It is superior performance, with low cost, nontoxic, pollution-free so the obtained silicon rubber of the present invention has a self-catalysis effect.
Although embodiments of the invention have been shown and described above, one of ordinary skill in the art is without departing from this
Above-described embodiment can be changed within the scope of the invention in the case of the principle and objective of invention, be changed, being replaced and
Modification.Any scheme to after simple transformation of the present invention belongs to protection scope of the present invention.
Claims (10)
1. a kind of dealcoholized type room temperature vulcanized silicone rubber of self-catalysis, it is characterised in that the silicon rubber includes the original of following mass parts
Material composition：
Hydroxyl-terminated injecting two methyl siloxane：50～100 parts；Filler：5～25 parts；Crosslinking agent：0.3～5 part.
2. room temperature vulcanized silicone rubber according to claim 1, it is characterised in that described dealcoholized type room temperature vulcanized silicone rubber
Tensile strength be 0.23～0.67MPa, elongation at break be 204～437%, tearing strength be 1.96～3.62MPa, shore
Hardness is 34.7～38.9Shore A.
3. room temperature vulcanized silicone rubber according to claim 1, it is characterised in that described room temperature vulcanized silicone rubber include as
The raw material composition of lower mass parts：
Hydroxyl-terminated injecting two methyl siloxane：50～100 parts；Filler：10～20 parts；Crosslinking agent：1～3 part.
4. room temperature vulcanized silicone rubber according to claim 1, it is characterised in that described hydroxyl-terminated injecting two methyl siloxane
For α, alpha, omega-dihydroxy polydimethyl siloxane；Preferably, the viscosity of described hydroxyl-terminated injecting two methyl siloxane be 1000～
8000cSt, molecular weight 10000-80000g/mol.
5. room temperature vulcanized silicone rubber according to claim 1, it is characterised in that described filler be fume colloidal silica,
One or more mixture in precipitated silica, precipitated calcium carbonate or powdered whiting.
6. room temperature vulcanized silicone rubber according to claim 1, it is characterised in that described crosslinking agent is the ethoxy of α-amido three
Base silane；
Preferably α-(N- normal-butyls) amine MTES, α-(N, N- diethyl) amine MTES, α-
(N, N- di-n-butyl) amine MTES, α-(N- cyclohexyl) amine MTES.
7. room temperature vulcanized silicone rubber according to claim 1, it is characterised in that described dealcoholized type room temperature vulcanized silicone rubber
Constitute including the raw material of following mass parts：
α, alpha, omega-dihydroxy polydimethyl siloxane：100 parts；Precipitated silica：15 parts；α-amine MTES：
2.25 parts.
8. a kind of preparation method of the room temperature vulcanized silicone rubber described in any one of claim 1～7, including step is as follows：
(1) hydroxyl-terminated injecting two methyl siloxane is stirred with filler, in 120～200 DEG C, under vacuum condition, mixing 30～
60min, obtains base-material；
(2) base-material is cooled into less than 40 DEG C, adds crosslinking agent, under vacuum condition, stirring mixing 1min～20min, solidification, i.e.,
Obtain the ketoxime removing type room temperature vulcanized silicone rubber of self-catalysis.
9. preparation method according to claim 8, it is characterised in that the temperature of mixing is 140～160 DEG C in step (1).
10. preparation method according to claim 8, it is characterised in that the vacuum condition described in step (1) and (2)
Vacuum is -0.09～-0.1MPa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109096776A (en) * | 2018-08-13 | 2018-12-28 | 山东大学 | A kind of no catalyst, expediting setting dealcoholized type fluorine silicone rubber and preparation method thereof |
| CN112708278A (en) * | 2020-12-25 | 2021-04-27 | 浙江中特化工有限公司 | UV (ultraviolet) curing liquid silicone rubber for online curing gasket |
| CN113429630A (en) * | 2021-06-25 | 2021-09-24 | 山东大学 | Application of double-bond functionalized alpha-amino triethoxysilane in crosslinking or modification |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101134887A (en) * | 2007-08-22 | 2008-03-05 | 中山大学 | Autocatalysis cross-linking organosilicon seal glue and method for making same |
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| CN101287786A (en) * | 2005-05-26 | 2008-10-15 | 特里姆科有限公司 | Polymer compositions and adhesives, coatings and sealants made therefrom |
| CN101134887A (en) * | 2007-08-22 | 2008-03-05 | 中山大学 | Autocatalysis cross-linking organosilicon seal glue and method for making same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109096776A (en) * | 2018-08-13 | 2018-12-28 | 山东大学 | A kind of no catalyst, expediting setting dealcoholized type fluorine silicone rubber and preparation method thereof |
| CN112708278A (en) * | 2020-12-25 | 2021-04-27 | 浙江中特化工有限公司 | UV (ultraviolet) curing liquid silicone rubber for online curing gasket |
| CN113429630A (en) * | 2021-06-25 | 2021-09-24 | 山东大学 | Application of double-bond functionalized alpha-amino triethoxysilane in crosslinking or modification |
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