CN113913017B - Rubber composition, single-component dealcoholized silicone rubber and preparation method thereof - Google Patents
Rubber composition, single-component dealcoholized silicone rubber and preparation method thereof Download PDFInfo
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Abstract
The invention provides a rubber composition, single-component dealcoholized silicone rubber and a preparation method thereof. The rubber composition comprises an alkoxy-containing silazane compound, a metal oxide, and a hydroxyl-terminated polydimethylsiloxane; the alkoxy-containing silazane compound has the formula
The structure shown, wherein R represents C 1 ～C 10 Is a hydrocarbon group. Compared with the prior rubber composition, the invention creatively introduces the component of the silazane compound containing alkoxy into the rubber composition, so as to carry out alkoxy end-capping treatment on the hydroxy end-capped polydimethylsiloxane while carrying out surface treatment on the metal oxide. Based on the dual synergistic effect, the rubber composition disclosed by the invention has better processability, and the single-component dealcoholized silicone rubber can be prepared only by simple process operation in the follow-up process. In particular, the single-component dealcoholized silicone rubber prepared later has better high-temperature resistance and better storage stability.
Description
Technical Field
The invention relates to the field of silicone rubber, in particular to a rubber composition, single-component dealcoholized silicone rubber and a preparation method thereof.
Background
The silicon rubber is special rubber with silicon-oxygen alternately bonded chain links as main chains and other organic groups as side chains. Because the silicon-oxygen chain has high bond energy, large bond angle and long bond length, the silicon-oxygen chain has excellent ultraviolet resistance, weather resistance, temperature resistance and other performances. Silicone rubber is generally usable for a long period of time at 200 ℃, but once the temperature exceeds 250 ℃, it rapidly embrittles and cracks, loses elasticity and loses functionality. The room temperature vulcanized silicone rubber has excellent performance of solidification without heating, is particularly single-component, is more convenient to use, and has wide application in the industries of new energy, household appliances, electronic appliances, aerospace, automobiles and the like. According to the small molecules released by curing, room temperature vulcanized silicone rubber is classified into deacidification, deamination, dealcoholization, ketoxime removal, acetone removal, lactic acid removal and the like. The dealcoholization is popular in some industries, especially household appliances, electronics and other industries, due to the excellent characteristics of environmental protection, high cost performance, no corrosion and the like.
However, the one-component dealcoholization has disadvantages of short shelf life and relatively poor temperature resistance compared to other types, and thus is limited in some high temperature resistant applications. In the prior art, a large number of patents and documents disclose means for improving the high temperature resistance of rubber. Such as CN103275491, which discloses a synthetic heat-resistant additive, but is complicated in process, high in cost, and is not mentioned as being applicable to one-component dealcoholized silicone rubber. Such as CN105503930, which discloses a soluble metal complex synthesis, although it can be used to improve the high temperature resistance of silicone rubber, it is necessary to synthesize polymers in advance and the synthesis time is long. Further, as in Song Yuanzhou et al, the use of silane treated metal oxides improves the temperature resistance of phenyl silicone rubber, but this method requires pretreatment of the metal oxides, is relatively complex in process, and involves only phenyl silicone rubber.
At present, the most common and most economical way is to add certain metal oxides to the one-component dealcoholized silicone rubber to improve its temperature resistance, such as CN106833505a. However, the metal oxide needs to be micro-scale or nano-scale to achieve the effect of improving the temperature resistance, and the surface of the metal oxide is provided with a plurality of active hydroxyl and other polar groups, so that the metal oxide has poor compatibility with the silicon rubber and influences the storage stability. Although the surface treatment can be carried out on the metal oxide, the customization treatment is needed to meet specific requirements, so that the process cost is high, the process is complex, and the industrial and marketable application cannot be realized.
In summary, the single-component dealcoholized silicone rubber in the prior art cannot simultaneously give consideration to high temperature resistance and storage stability. Therefore, it is necessary to provide a single-component dealcoholized silicone rubber, which can simultaneously give consideration to high temperature resistance and storage stability, and has the advantages of simpler and easier preparation process, lower cost and better industrial application.
Disclosure of Invention
The invention mainly aims to provide a rubber composition, a single-component dealcoholized silicone rubber and a preparation method thereof, so as to solve the problem that the single-component dealcoholized silicone rubber in the prior art cannot simultaneously achieve high temperature resistance and storage stability.
In order to achieve the above object, according to one aspect of the present invention, there is provided a rubber composition. The rubber composition comprises an alkoxy-containing silazane compound, a metal oxide, and a hydroxyl-terminated polydimethylsiloxane; the alkoxy-containing silazane compound has a structure represented by formula I, wherein R represents C 1 ～C 10 Is a group comprising an alkyl group,
further, the rubber composition comprises 100 parts by weight of hydroxyl-terminated polydimethylsiloxane, 0.1 to 5 parts by weight of an alkoxy-containing silazane compound, and 1 to 10 parts by weight of a metal oxide.
Further, R represents methyl, ethyl or propyl; preferably the alkoxy-containing silazane compound is selected from the group consisting of tetramethyl di (trimethoxysilylethyl) disilazane and/or tetramethyl di (triethoxysilylethyl) disilazane.
Further, the metal oxide is selected from micro-iron oxide and/or nano-cerium oxide.
Further, the viscosity of the hydroxy-terminated polydimethylsiloxane is 2000 to 50000cps at a temperature of 25 ℃.
Further, the rubber composition further comprises one or more of a filler, a plasticizer, a silane coupling agent and a catalyst; preferably, the rubber composition further comprises 0.001 to 600 parts by weight of filler, 0.001 to 50 parts by weight of plasticizer, 0.001 to 10 parts by weight of silane coupling agent and 0.01 to 2 parts by weight of catalyst.
Further, the plasticizer is methyl silicone oil; preferably, the filler is selected from one or more of hydrophobic fumed silica, calcium carbonate, silica micropowder, alumina or aluminum hydroxide; preferably, the silane coupling agent is selected from one or more of methyltrimethoxysilane, aminoethylaminopropyl trimethoxysilane, aminotrimethoxysilane, acryloxytrimethoxysilane, epoxypropyl trimethoxysilane or tetrabutyl titanate; preferably, the catalyst is selected from titanium ethyl diisopropoxydiacetoacetate and/or dibutyltin dilaurate.
In order to achieve the above object, according to one aspect of the present invention, there is provided a one-component dealcoholized silicone rubber which is obtained by blending and curing the above rubber composition.
In order to achieve the above object, according to one aspect of the present invention, there is provided a method for preparing a one-component dealcoholized silicone rubber, blending and curing the above rubber composition to obtain the one-component dealcoholized silicone rubber.
Further, the preparation method comprises the following steps: dehydrating an alkoxy-containing silazane compound, a metal oxide and hydroxyl-terminated polydimethylsiloxane in an inert gas atmosphere, and then carrying out first blending treatment for 1-2 h in a reaction kettle; and adding one or more of filler, plasticizer, silane coupling agent and catalyst into the reaction kettle for second blending treatment, and then curing to obtain the single-component dealcoholized silicone rubber.
Compared with the prior rubber composition, the invention creatively introduces the component of the silazane compound containing alkoxy into the rubber composition, so as to carry out alkoxy end-capping treatment on the hydroxy end-capped polydimethylsiloxane while carrying out surface treatment on the metal oxide. Based on the dual synergistic effect, the rubber composition disclosed by the invention has better processability, and the single-component dealcoholized silicone rubber can be prepared only by simple process operation in the follow-up process. In particular, the single-component dealcoholized silicone rubber prepared later has better high-temperature resistance and better storage stability.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present invention will be described in detail with reference to examples.
As described in the background section, the prior art has the problem that the single-component dealcoholized silicone rubber cannot simultaneously achieve high temperature resistance and storage stability. In order to solve this problem, the present invention provides a rubber composition comprising a silazane compound containing an alkoxy group, a metal oxide and a hydroxyl-terminated polydimethylsiloxane.
Compared with the prior rubber composition, the invention creatively introduces the component of the silazane compound containing alkoxy into the rubber composition, so as to carry out alkoxy end-capping treatment on the hydroxy end-capped polydimethylsiloxane while carrying out surface treatment on the metal oxide. Based on the dual synergistic effect, the rubber composition disclosed by the invention has better processability, and the single-component dealcoholized silicone rubber can be prepared only by simple process operation in the follow-up process. In particular, the single-component dealcoholized silicone rubber prepared later has better high-temperature resistance and better storage stability.
Specifically, on the one hand, the metal oxide can be subjected to surface treatment by using the silazane compound containing alkoxy groups to eliminate the surface active hydroxyl groups of the metal oxide and improve the compatibility with the silicone rubber. Meanwhile, the surface of the metal oxide after surface treatment has active alkoxy, and the metal oxide can react into a silicon rubber matrix in the subsequent curing process, so that the high temperature resistance of the material is further improved. On the other hand, alkoxy-capping of a hydroxyl-terminated polydimethylsiloxane with an alkoxy-containing silazane compound can produce an alkoxy-terminated polymer, thereby improving the processability of the rubber composition and the stability of the one-component dealcoholized silicone rubber. In addition, the reactivity of the alkoxy-containing nitrogen silane may be higher than that of the alkoxy group alone, or other compounds containing an alkoxy group. In the preparation process, the silane compound containing alkoxy can react the hydroxyl on the hydroxyl-terminated polydimethylsiloxane, so that the problem of poor material performance caused by the phenomenon of viscosity increase is avoided due to the fact that the silane compound slowly reacts in the later storage process.
In order to further balance the excellent high temperature resistance and storage stability of the one-component dealcoholized silicone rubber, the rubber composition comprises, by weight, 100 parts of hydroxyl-terminated polydimethylsiloxane, 0.1 to 5 parts of an alkoxy-containing silazane compound, and 1 to 10 parts of a metal oxide. In some alternative embodiments, the rubber composition comprises, in parts by weight, 100 parts by weight of a hydroxyl-terminated polydimethylsiloxane, 1 part of an alkoxy-containing silazane compound, and 5 parts of a metal oxide; alternatively, the rubber composition comprises 100 parts by weight of a hydroxyl-terminated polydimethylsiloxane, 0.5 parts of an alkoxy-containing silazane compound, and 5 parts of a metal oxide; alternatively, the rubber composition comprises 100 parts by weight of a hydroxyl-terminated polydimethylsiloxane, 2 parts of an alkoxy-containing silazane compound, and 5 parts of a metal oxide; alternatively, the rubber composition comprises 100 parts by weight of a hydroxyl-terminated polydimethylsiloxane, 0.1 part of an alkoxy-containing silazane compound, and 5 parts of a metal oxide; alternatively, the rubber composition includes 100 parts by weight of a hydroxyl-terminated polydimethylsiloxane, 5 parts of an alkoxy-containing silazane compound, and 5 parts of a metal oxide.
In order to further improve the high temperature resistance and storage stability of the one-component dealcoholized silicone rubber, it is preferable that R represents methyl, ethyl or propyl in the silazane compound containing an alkoxy group, and it is further preferable that the silazane compound containing an alkoxy group is selected from tetramethyldi (trimethoxysilylethyl) disilazane and/or tetramethyldi (triethoxysilylethyl) disilazane.
In an alternative embodiment, the alkoxy silazane compounds of the present invention may be synthesized according to the prior art or may be commercially available as such. In a preferred embodiment, the alkoxy-silane compounds of the present invention may be synthesized by the steps of: under the nitrogen atmosphere, the tetramethyl divinyl disilazane and the Kast platinum catalyst are mixed in a reaction kettle, and trimethoxysilane or triethoxysilane is dropwise added into the reaction system to react for 2-3 hours after the temperature of the reaction system is raised to 60-70 ℃. And then transferring all reactants into a pressure reducing device, removing unreacted excess trimethoxysilane or triethoxysilane under reduced pressure, and obtaining residues which are tetramethyl di (trimethoxysilylethyl) disilazane (corresponding to dropwise trimethoxysilane) or tetramethyl di (triethoxysilylethyl) disilazane (corresponding to dropwise triethoxysilane). The synthetic route is shown below (R represents methyl or ethyl):
preferably, the metal oxide is selected from the group consisting of micro-iron oxide and/or nano-cerium oxide. The metal oxide is selected from the above types, the high temperature resistance of the single-component dealcoholized silicone rubber is better, and the synergy between the single-component dealcoholized silicone rubber and other components is better.
Preferably, the viscosity of the hydroxy-terminated polydimethylsiloxane is in the range of 2000 to 50000cps at a temperature of 25 ℃. Based on this, the processability of the composition is better, and the excellent properties of each component in the composition are more uniformly and more stably maintained when the one-component dealcoholized silicone rubber is subsequently prepared.
In a preferred embodiment, the rubber composition further comprises one or more of a filler, a plasticizer, a silane coupling agent, and a catalyst. The filler is added, and the single-component dealcoholized silicone rubber has better strength on the basis of simultaneously considering high temperature resistance, namely storage stability, so that the rubber material has better processability, and the product has good wear resistance, tear resistance, heat resistance, cold resistance, oil resistance and other properties. The plasticizer is added to reduce the acting force among the molecules of the product, thereby reducing the vitrification temperature of the product, increasing the plasticity and the fluidity of the product and being convenient for molding. The silane coupling agent is added to further improve the mechanical property, heat resistance, water resistance and weather resistance of the product. The catalyst can be added to further improve the preparation efficiency of the product.
In order to further balance the above-mentioned excellent properties of the article, in a preferred embodiment, the rubber composition further comprises, in parts by weight, 0.001 to 600 parts of a filler, 0.001 to 50 parts of a plasticizer, 0.001 to 10 parts of a silane coupling agent, and 0.01 to 2 parts of a catalyst. In some alternative embodiments, the composition further comprises, in parts by weight, 8 parts filler, 5 parts plasticizer, 2.5 parts silane coupling agent, and 1.5 parts catalyst; alternatively, the composition further comprises 8 parts of filler, 5 parts of plasticizer, 1.5 parts of silane coupling agent and 0.2 part of catalyst; alternatively, the composition further comprises 8 parts of filler, 5 parts of plasticizer, 1.5 parts of silane coupling agent and 0.2 parts of catalyst.
The filler, the plasticizer, the silane coupling agent and the catalyst of the invention can be selected from reagents commonly used in the field. In a preferred embodiment, the plasticizer is methyl silicone oil; the filler is one or more of hydrophobic fumed silica, calcium carbonate, silica micropowder, aluminum oxide or aluminum hydroxide; the silane coupling agent is selected from one or more of methyltrimethoxysilane, aminoethylaminopropyl trimethoxysilane, amino trimethoxysilane, acryloxytrimethoxysilane, epoxypropyl trimethoxysilane or tetrabutyl titanate; the catalyst is selected from titanium ethyl diisopropoxy diacetoacetate and/or dibutyltin dilaurate.
According to another aspect of the present invention, there is also provided a one-component dealcoholized silicone rubber which is obtained by blending the above-mentioned rubber composition.
Based on the reasons, the single-component dealcoholized silicone rubber can simultaneously give consideration to better high temperature resistance and storage stability, has simpler preparation process and lower cost, and is easier for industrial production and commercial application.
According to the other aspect of the invention, the invention also provides a preparation method of the single-component dealcoholized silicone rubber, and the single-component dealcoholized silicone rubber is obtained by blending and curing the rubber composition.
Based on the reasons, the single-component dealcoholized silicone rubber disclosed by the invention is simpler in preparation process, lower in cost, easier for industrial production and commercial application, and better in high-temperature resistance and storage stability.
Preferably, the preparation method comprises the following steps: under the inert gas atmosphere, firstly dehydrating the silane compound containing alkoxy, metal oxide and hydroxy-terminated polydimethylsiloxane, and then carrying out first blending treatment for 1-2 h in a reaction kettle; and adding one or more of a filler, a softener, a silane coupling agent and a catalyst into the reaction kettle for second blending treatment, and then curing to obtain the single-component dealcoholized silicone rubber. Based on the above, the reaction is more stable and more sufficient in the blending reaction process, and the excellent performance uniformity of the single-component dealcoholized silicone rubber is better.
In an alternative embodiment, a planetary stirred tank may be used as the reaction tank. Preferably, in the first blending treatment process, the temperature is 100-120 ℃, the vacuum degree is 0.08-0.09 MPa, the stirring speed is 300-600 rpm, and the stirring time is 50-70 min. In the second blending treatment process, the temperature is 30-40 ℃, the vacuum degree is 0.08-0.09 MPa, the stirring speed is 200-400 rpm, and the stirring time is 20-40 min.
Preferably, in the transition process of reducing the temperature of the first blending treatment to the temperature of the second blending treatment in the reaction kettle, the cooling rate is 3-10 ℃/min, and the cooling time is 10-20 min. Based on this, the transition from the first blending process condition to the second blending process is smoother, and the above-described excellent property uniformity of the article is better.
The present application is described in further detail below in conjunction with specific embodiments, which should not be construed as limiting the scope of the claims.
The sources of the raw materials used in the embodiment of the invention are as follows:
tetramethyl divinyl disilazane (North Roselong chemical Co., ltd., lake)
Methyltrimethoxysilane (Hubei Xinlantian New Material Co., ltd.)
Trimethoxyhydrosilane (Jing Zhou city Jiang Han Fine chemical Co., ltd.)
Triethoxy hydrosilane (Jing Zhou city Jiang Han Fine chemical Co., ltd.)
Dibutyl tin dilaurate (Ridong chemical industry Co., ltd.)
Titanium ethyl diisopropoxy diacetoacetate (Hubei Xinlan Tian New Material Co., ltd.)
Kasitter platinum catalyst (10000 ppm) (Dongguan megaly New organosilicon Material Co., ltd.)
Aminoethyl amine propyl trimethoxysilane (Nanjing Bisilicon chemical Co., ltd.)
20000cps hydroxy-terminated polydimethoxy silane (Jiangxi Starfire chemical Co., ltd.)
100cps methyl silicone oil (Jiangxi Starfire chemical industry Co., ltd.)
Micron iron red (Zhejiang Huayuan pigment Co., ltd.)
Nanometer cerium oxide (Xuan Chengjing Rui New Material Co., ltd.)
Hydrophobic fumed silica R974 (winning)
Example 1
Synthesis of alkoxy silazane compounds
370g of tetramethyl divinyl disilazane and 1.1g of Kanst platinum catalyst (10000 ppm) are added into a 1000ml four-neck flask with a mechanical stirring device, a 500ml constant pressure dropping funnel, a reflux pipe and a nitrogen inlet pipe, and nitrogen is introduced for protection, and the mixture is stirred uniformly; 268g of trimethoxysilane or 360g of triethoxysilane were added to a 500ml constant pressure addition funnel; heating the four-neck flask to 60 ℃; then, the raw materials in the dropping funnel are dropped into the flask, and the dropping speed is controlled to the reaction temperature not to exceed 70 ℃. After the dripping is finished, the reaction is continued for 2 hours at the temperature of (60-70). And then transferring all reactants into a decompression device, decompressing and removing unreacted excess trimethoxysilane or triethoxysilane as raw materials, and obtaining residues which are the required tetramethyl di (trimethoxysilylethyl) disilazane and tetramethyl di (triethoxysilylethyl) disilazane. The reaction chemistry is as follows (R represents methyl or ethyl):
example 2
Single-component dealcoholized silicone rubber
100 parts of 20000cps hydroxyl-terminated polydimethylsiloxane, 5 parts of micrometer iron oxide red, 1 part of tetramethyl di (trimethoxy silicon-based ethyl) disilazane, uniformly mixing in a planetary stirring kettle, heating to (100-120) ℃ in a nitrogen atmosphere, performing high-temperature in-situ treatment for 1h, and reducing the temperature to 40 ℃ in vacuum. Then 5 parts of 100cps methyl silicone oil and 8 parts of hydrophobic gas-phase white carbon black R974 are added and mixed uniformly. 2 parts of methyltrimethoxysilane, 1.5 parts of diisopropoxy diacetoacetic acid ethyl ester titanium and 0.5 part of aminoethylaminopropyl trimethoxysilane are added, evenly mixed, de-true, discharged and packaged, and the mixture is tested after being placed for 7 days at room temperature.
Example 3
The only difference from example 2 is that: 1.5 parts of titanium ethyl diisopropyloxy diacetoacetate, 0.5 part of aminoethylaminopropyl trimethoxysilane in example 2 were replaced with 0.2 parts of dibutyltin dilaurate, 1.5 parts of aminoethylaminopropyl trimethoxysilane.
Example 4
The only difference from example 2 is that: 1 part of tetramethylbis (trimethoxysilylethyl) disilazane in example 2 was replaced with 1 part of tetramethylbis (triethoxysilylethyl) disilazane.
Example 5
The only difference from example 2 is that: 1 part of tetramethylbis (trimethoxysilylethyl) disilazane in example 2 was replaced with 0.5 part of tetramethylbis (trimethoxysilylethyl) disilazane.
Example 6
The only difference from example 2 is that: the 5 parts of the micrometer iron oxide red in example 2 was replaced with 5 parts of the nanometer cerium oxide.
Example 7
The only difference from example 2 is that: 5 parts of micron iron oxide red in the example 2 is replaced by 5 parts of nano cerium oxide; 1 part of tetramethylbis (trimethoxysilylethyl) disilazane in example 2 was replaced with 2 parts of tetramethylbis (trimethoxysilylethyl) disilazane; 1.5 parts of titanium ethyl diisopropyloxy diacetoacetate, 0.5 part of aminoethylaminopropyl trimethoxysilane in example 2 were replaced with 0.2 parts of dibutyltin dilaurate, 1.5 parts of aminoethylaminopropyl trimethoxysilane.
Example 8
The only difference from example 2 is that: 1 part of tetramethylbis (trimethoxysilylethyl) disilazane in example 2 was replaced with 0.1 part of tetramethylbis (trimethoxysilylethyl) disilazane.
Example 9
The only difference from example 2 is that: 1 part of tetramethylbis (trimethoxysilylethyl) disilazane in example 2 was replaced with 5 parts of tetramethylbis (trimethoxysilylethyl) disilazane.
Example 10
The only difference from example 2 is that: 1 part of tetramethylbis (trimethoxysilylethyl) disilazane in example 2 was replaced with 8 parts of tetramethylbis (trimethoxysilylethyl) disilazane.
Comparative example 1
The only difference from example 2 is that: no tetramethyl di (trimethoxysilylethyl) disilazane was added.
Comparative example 2
The only difference from example 3 is that: no tetramethyl di (trimethoxysilylethyl) disilazane was added.
Comparative example 3
The only difference from example 4 is that: no tetramethyl di (trimethoxysilylethyl) disilazane was added.
Comparative example 4
The only difference from example 5 is that: no tetramethyl di (trimethoxysilylethyl) disilazane was added.
Comparative example 5
The only difference from example 6 is that: no tetramethyl di (trimethoxysilylethyl) disilazane was added.
Characterization of the properties:
surface drying time: GB/T13477.5-2002 (finger touch)
The above examples and comparative examples test data are shown in table 1.
TABLE 1
Table 1, below
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rubber composition, characterized in that the rubber composition consists of an alkoxy-containing silazane compound, a metal oxide, hydroxyl-terminated polydimethylsiloxane, a filler, a plasticizer, a silane coupling agent and a catalyst;
the metal oxide is selected from micrometer ferric oxide and/or nanometer cerium oxide;
the filler is one or more selected from hydrophobic fumed silica, calcium carbonate, silica micropowder, aluminum oxide or aluminum hydroxide;
the alkoxy-containing silazane compound has a structure represented by formula I:
Wherein R represents C 1 ~C 10 Alkyl of (a);
the rubber composition is prepared by the following preparation method:
in the atmosphere of inert gas, the reaction mixture,
dehydrating the silazane compound containing alkoxy, the metal oxide and the hydroxyl-terminated polydimethylsiloxane, and then carrying out first blending treatment for 1-2 h in a reaction kettle;
and adding the filler, the plasticizer, the silane coupling agent and the catalyst into the reaction kettle for second blending treatment to obtain the rubber composition.
2. The rubber composition according to claim 1, wherein the rubber composition is composed of 100 parts by weight of a hydroxyl-terminated polydimethylsiloxane, 0.1 to 5 parts by weight of the alkoxy-containing silazane compound, 1 to 10 parts by weight of the metal oxide, 0.001 to 600 parts by weight of the filler, 0.001 to 50 parts by weight of the plasticizer, 0.001 to 10 parts by weight of the silane coupling agent, and 0.01 to 2 parts by weight of the catalyst.
3. Rubber composition according to claim 1 or 2, wherein R represents methyl, ethyl or propyl.
4. A rubber composition according to claim 3, wherein the alkoxy-containing silazane compound is selected from the group consisting of tetramethyl di (trimethoxysilylethyl) disilazane and/or tetramethyl di (triethoxysilylethyl) disilazane.
5. The rubber composition according to claim 1 or 2, wherein the viscosity of the hydroxyl-terminated polydimethylsiloxane is 2000 to 50000cps at 25 ℃.
6. The rubber composition according to claim 2, wherein the plasticizer is methyl silicone oil.
7. The rubber composition according to claim 6, wherein the silane coupling agent is one or more selected from the group consisting of methyltrimethoxysilane, aminoethylaminopropyl trimethoxysilane, aminotrimethoxysilane, acryloxytrimethoxysilane, epoxypropyl trimethoxysilane.
8. The rubber composition according to claim 6, wherein the catalyst is selected from titanium ethyl diisopropoxydiacetoacetate and/or dibutyltin dilaurate.
9. A one-component dealcoholized silicone rubber, characterized in that it is obtained by blending and curing the rubber composition according to any one of claims 1 to 8.
10. A process for the preparation of a one-component dealcoholized silicone rubber, characterized in that the rubber composition according to any one of claims 1 to 8 is cured to obtain the one-component dealcoholized silicone rubber.
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| ATE40832T1 (en) * | 1983-10-18 | 1989-03-15 | Gen Electric | DEBLOCKING CATALYSTS FOR FORMING ONE-COMPONENT R.T.V. COMPOSITIONS WITH ALKOXY FUNCTIONALITY. |
| EP0139064A1 (en) * | 1983-10-27 | 1985-05-02 | General Electric Company | Novel scavengers for one-component RTV compositions |
| CA1256233A (en) * | 1984-11-23 | 1989-06-20 | Rack H. Chung, (Deceased) | Silane scavengers for hydroxy radicals containing silicon-hydrogen bonds |
| US4847400A (en) * | 1987-09-11 | 1989-07-11 | Dow Corning Corporation | Polyalkoxysilylalkylenedisilazanes and silylamines |
| US5624997A (en) * | 1993-08-30 | 1997-04-29 | Dow Corning Corporation | Precured silicone emulsion |
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| CN101983989B (en) * | 2010-11-01 | 2012-03-28 | 深圳市森日有机硅材料有限公司 | Liquid silicon rubber composition and preparation method thereof |
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| CN102911401B (en) * | 2012-11-08 | 2014-04-23 | 广州市回天精细化工有限公司 | Hydroxyl scavenging agent, preparation method thereof and vulcanized silicone rubber containing hydroxyl scavenging agent |
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| CN111363365B (en) * | 2020-03-24 | 2022-03-11 | 新安天玉有机硅有限公司 | Ultra-high pressure and high temperature resistant mixed silicone rubber and preparation method thereof |
| CN111394052B (en) * | 2020-05-27 | 2022-04-26 | 绵阳惠利电子材料有限公司 | Dealcoholized condensed type double-component room temperature vulcanized silicone rubber and preparation method thereof |
| CN112662370B (en) * | 2020-12-16 | 2022-10-28 | 江西晨光新材料股份有限公司 | Single-component dealcoholized silicone sealant and preparation method thereof |
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