CN112266733A - High-temperature-resistant single-component silicone pouring sealant and preparation method thereof - Google Patents
High-temperature-resistant single-component silicone pouring sealant and preparation method thereof Download PDFInfo
- Publication number
- CN112266733A CN112266733A CN202011232541.9A CN202011232541A CN112266733A CN 112266733 A CN112266733 A CN 112266733A CN 202011232541 A CN202011232541 A CN 202011232541A CN 112266733 A CN112266733 A CN 112266733A
- Authority
- CN
- China
- Prior art keywords
- temperature
- percent
- pouring sealant
- resistant
- component silicone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to the technical field of adhesives, and provides a high-temperature-resistant single-component silicone pouring sealant and a preparation method thereof. The high-temperature-resistant single-component silicone pouring sealant comprises the following components in parts by mass: 35.0-70.0 percent of alpha-omega-dihydroxy polydimethylsiloxane (107 silicon rubber), 10.0-30.0 percent of plasticizer, 1.0-5.0 percent of heat-resistant additive, 5.0-30.0 percent of reinforcing material, 3.0-7.0 percent of cross-linking agent, 0.5-1.5 percent of deep curing auxiliary agent and 0.1-1.0 percent of catalyst. The invention solves the problems that the existing acetone-removing room temperature vulcanized fluorine-silicon sealant has higher product viscosity, does not meet the use requirement of the encapsulation process and has high manufacturing cost.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a high-temperature-resistant single-component silicone pouring sealant and a preparation method thereof.
Background
The electric heating tube is an electric element special for converting electric energy into heat energy, and is applied to various devices such as a saltpeter groove, a water tank, an oil tank, an acid-base groove, an easily-fusible metal melting furnace, an air heating furnace, a drying oven, a hot-pressing die and the like. Compared with the traditional heating, the heating device has the advantages of no pollution, convenient installation, convenient use and low price, and belongs to environment-friendly green production. The electric heating is a mainstream mode of future industrial heating, and a huge market demand is opened for the electric heating pipe, so that a huge commercial opportunity is provided for the pouring sealant for insulating and encapsulating the head part of the heating wire of the electric heating pipe. The electric heating tube is usually encapsulated by silicone pouring sealant or inorganic glue solution, wherein the silicone pouring sealant is preferred due to convenience in use and cost advantage.
The silicone pouring sealant in the market at present has many reaction types such as dealcoholization type, ketoxime type and deacidification type, basically adopts a two-component use mode, needs to be matched with corresponding automatic glue mixing equipment and has larger site demand, and the use popularity of the silicone pouring sealant is limited to a certain extent. The room temperature vulcanization single-component silicone pouring sealant does not need to be mixed, can simultaneously meet the requirements of manual operation and machine automation operation, but has higher requirements on curing depth due to the characteristic of cross-linking reaction from the outside to the inside, is usually only suitable for shallow layer pouring and sealing with the pouring and sealing depth not exceeding 3mm, and limits the application and popularization of the room temperature vulcanization single-component silicone pouring sealant to a certain extent.
In addition, according to the related research, the deacetone type silicone sealant has the best thermal aging resistance compared with the dealcoholization type, the deketoxime type, the deacidization type and the like silicone sealants. For example, patent CN 110819297 discloses a condensed heat-conducting flame-retardant pouring sealant capable of being vulcanized quickly at room temperature and a preparation method thereof, which mainly improves the flame retardance and heat conductivity of the pouring sealant and has a good application prospect in the field of electronic industry, especially flame-retardant pouring of integrated circuits. Patent CN 110499140A discloses a de-acetone type room temperature vulcanized fluorine-silicon sealant and a preparation method thereof, the patent has outstanding mechanical properties and excellent heat-resistant aging performance, and the sealant is mainly applied to sealing and repairing of airplane fuel tanks. However, the product viscosity is higher and does not meet the use requirement of the encapsulation process, and meanwhile, the fluorosilicone rubber with high cost is adopted, so that great cost pressure is brought to downstream customers. Therefore, the high-temperature-resistant single-component silicone pouring sealant and the preparation method thereof have the characteristics of convenience in operation, good fluidity, good deep curing property, good temperature resistance and the like, can well meet the use requirements of a pouring and sealing process, and have good market application prospects in the industrial fields of automobiles, electronics and the like, such as electric heating pipe pouring and sealing, high-temperature electronic and electric appliance pouring and the like.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides the high-temperature-resistant single-component silicone pouring sealant and the preparation method thereof.
In order to solve the technical problem, the invention adopts the following scheme: the high-temperature-resistant single-component silicone pouring sealant comprises the following raw material components in percentage by mass:
35.0 to 70.0 percent of alpha-omega-dihydroxy polydimethylsiloxane (107 silicon rubber)
10.0 to 30.0 percent of plasticizer
1.0 to 5.0 percent of heat-resistant additive
5.0 to 30.0 percent of reinforcing material
3.0 to 7.0 percent of cross-linking agent
0.5 to 1.5 percent of deep curing auxiliary agent
0.1 to 1.0 percent of catalyst.
Further, the alpha-omega-dihydroxy polydimethylsiloxane (107 silicon rubber) is one or a mixture of 107 silicon rubbers with the viscosities of 1500cps,5000cps and 20000cps at 25 ℃.
Further, the plasticizer is one or a mixture of dimethicone having a viscosity of 50cps, 100cps and 350cps at 25 deg.C.
Further, the heat-resistant additive is one or a mixture of ferric oxide, cerium oxide, nano titanium dioxide and a soluble metal organic silicon compound.
Further, the reinforcing material is one or a mixture of active nano calcium carbonate, silica micropowder and fumed silica.
Further, the cross-linking agent is one of methyl tripropenoxysilane, vinyl tripropenoxysilane, phenyl tripropenoxysilane or a mixture thereof.
Further, the deep-layer curing auxiliary agent is one or a mixture of dimethyl diacryloxy silane, methyl vinyl diacryloxy silane, gamma-aminopropyltriethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane.
Further, the catalyst is tetramethyl guanidine propyl trimethoxy silane.
The preparation method of any one of the high-temperature-resistant single-component silicone pouring sealants comprises the following steps:
(1) preparing base rubber: firstly, carrying out a dispersion dehydration process, putting 107 silicon rubber and a reinforcing material into a kneader according to the weight ratio of (45.0-90.0) to (10.0-55.0), heating, vacuumizing, stirring and dispersing, wherein the temperature of the material is controlled at 120 ℃, the vacuum degree reaches-0.1 MPa, and the duration is 2.0-2.5 hours, then carrying out a three-roll grinding process, cooling the dispersed and dehydrated material to room temperature, carrying out three-roll grinding, controlling the particle size below 40um, and storing in a sealed manner for later use;
(2) adding the base rubber, the plasticizer and the heat-resistant additive into a power mixing and stirring kettle according to the formula proportion, vacuumizing, stirring and mixing uniformly;
(3) on the basis of the step (2), adding corresponding cross-linking agents according to the formula proportion, vacuumizing, stirring and mixing uniformly;
(4) on the basis of the step (3), adding the deep curing auxiliary agent and the catalyst according to the formula proportion, vacuumizing, stirring and mixing uniformly;
(5) and (4) filling and sealing to obtain the high-temperature-resistant single-component silicone pouring sealant.
By adopting the technical scheme, the invention has the beneficial effects that: a deacetone type reaction system is adopted, 107 silicon rubber and a reinforcing material are kneaded and then combined with a cross-linking agent and a catalyst, the cross-linking agent and the catalyst have the functions of forming Si-O bonds through condensation reaction, the molecular chains of the silicon rubber are cross-linked with each other to form a three-dimensional network structure, the strength of the pouring sealant is improved, meanwhile, the formed high-bond energy Si-O also contributes to inhibiting the high-temperature decomposition degree and improving the temperature resistance of the pouring sealant, the reinforcing material has the functions of improving the body strength and improving the temperature resistance of the pouring sealant in the system, a high-temperature resistant single-component silicone pouring sealant is prepared by adopting a high-efficiency heat-resistant additive and a deep curing auxiliary agent, the high-efficiency heat-resistant additive has the functions of inhibiting the silicon rubber from breaking and decomposing molecular chains at high temperature to cause strength reduction and contribute to improving the temperature resistance of the pouring sealant, and the deep curing auxiliary agent in the system contributes to, the high-temperature-resistant single-component silicone pouring sealant prepared by the invention has the characteristics of good fluidity, good heat resistance, good deep curing property and the like, and can be used for electric heating tube filling and sealing, high-temperature electronic appliance filling and sealing and other filling and sealing occasions with temperature resistance requirements.
Detailed Description
The invention will now be further described with reference to specific embodiments.
Example 1:
preparing base glue H:
the base adhesive H comprises the following components in percentage by weight: 107(5000cps) silicone rubber: 2.5 Kg; 107 (20000 cps): 1.5Kg, fumed silica LM-150: 1.0Kg
The preparation process of the base adhesive H comprises the following steps: a. the oil temperature is set to be 150 ℃, the material temperature is set to be 120 ℃, and the temperature is increased by heating. B. Adding 5000cps and 20000cps 107 silicone rubber into a kneader according to the formula weight, kneading and dispersing for 10-15 min; c. putting the fumed silica LM-150 into a kneader according to the weight of the formula, kneading and dispersing for 30 min; d. cleaning fumed silica powder on the wall of the kneader, locking the kneader kettle cover, starting vacuum, kneading and stirring, starting timing when the temperature of the material rises to 120 ℃, vacuumizing, kneading and dispersing for 2 hours, and finishing the dehydration and dispersion process; e. transferring the dehydrated and dispersed base glue from the kneading machine to a transfer barrel, cooling to room temperature, carrying out three-roll grinding to obtain base glue H, and storing in a sealed manner for later use.
The pouring sealant comprises the following components in percentage by weight:
base rubber H: 1000 g; 107(5000cps) silicone rubber: 500 g; dimethicone (100 cps): 300 g; iron sesquioxide: 70g of a mixture; vinyl triacrylate oxysilane: 60g of the total weight of the mixture; methyltrtriacrylate oxysilane: 40g of the total weight of the mixture; dimethyl diacryloxysilane: 20g of the total weight of the mixture; 10g of tetramethylguanidylpropyltrimethoxysilane.
The preparation process of the pouring sealant comprises the following steps:
a. putting the base rubber H, 107(5000cps) silicon rubber and ferric oxide into a power mixing stirrer according to the formula weight, and vacuumizing for dispersing for 15-20 min; b. adding 100cps dimethyl silicone oil into a power mixing stirrer, and vacuumizing for 5-10 min; c. putting the vinyl tripropenoxysilane and the methyl tripropenoxysilane into a power mixing stirrer according to the formula weight, and vacuumizing and dispersing for 20-25 min; d. putting dimethyl diacryloxy silane and tetramethyl guanidine propyl trimethoxy silane into a power mixing stirrer according to the formula weight, and vacuumizing and dispersing for 30-35 min; e. and sealing and subpackaging the prepared semi-finished product into 300ml of silica gel tubes to prepare the high-temperature-resistant single-component silicone pouring sealant to be tested.
And (3) testing the performance of the pouring sealant:
a. basic physical property test: performing related tests according to GB/T13477, GB/T-528 and GB/T531;
b. and (3) testing temperature resistance: pouring the pouring sealant to the head of the heating pipe, standing and curing for 24 hours, and testing the temperature resistance of the pouring sealant.
The specific test results are shown in table 1.
Example 2:
the pouring sealant comprises the following components in percentage by weight:
base rubber H: 1000 g; 107(5000cps) silicone rubber: 450g of the total weight of the mixture; dimethicone (350 cps): 300 g; soluble metal organosilicon compound: 105 g; nano titanium dioxide: 15g of the total weight of the mixture; vinyl triacrylate oxysilane: 60g of the total weight of the mixture; phenyl triacrylate oxysilane: 40g of the total weight of the mixture; methylvinyldiallyloxysilane: 10g of a mixture; 20g of tetramethylguanidinopropyltrimethoxysilane.
The preparation process of the pouring sealant comprises the following steps:
a. putting the base rubber H, 107(5000cps) silicon rubber, soluble metal organic silicon compound and nano titanium dioxide into a power mixing stirrer according to the formula weight, and vacuumizing for dispersing for 15-20 min; b. adding 350cps dimethyl silicone oil into the power mixing stirrer, and vacuumizing for 5-10 min; c. putting the vinyl tripropenoxysilane and the phenyl tripropenoxysilane into a power mixing stirrer according to the formula weight, and vacuumizing and dispersing for 20-25 min; d. putting methyl vinyl diacryloxysilane and tetramethylguanidyl propyl trimethoxy silane into a power mixing stirrer according to the formula weight, and vacuumizing and dispersing for 30-35 min; e. and sealing and subpackaging the prepared semi-finished product into 300ml of silica gel tubes to prepare the high-temperature-resistant single-component silicone pouring sealant to be tested.
And (3) testing the performance of the pouring sealant:
a. basic physical property test: performing related tests according to GB/T13477, GB/T-528 and GB/T531;
b. and (3) testing temperature resistance: pouring the pouring sealant to the head of the heating pipe, standing and curing for 24 hours, and testing the temperature resistance of the pouring sealant.
The specific test results are shown in table 1.
Example 3:
preparing base glue L:
the base rubber L comprises the following components in percentage by weight: 107(5000cps) silicone rubber: 1.5 Kg; 107 (20000 cps): 1.5Kg, fumed silica LM-150: 1.0Kg, nano calcium carbonate: 1.0Kg
The preparation process of the base rubber L comprises the following steps: a. the oil temperature is set to be 150 ℃, the material temperature is set to be 120 ℃, and the temperature is increased by heating. B. Adding 5000cps and 20000cps 107 silicone rubber into a kneader according to the formula weight, kneading and dispersing for 10-15 min; c. putting the nano calcium carbonate and the fumed silica LM-150 into a kneader according to the weight of the formula, kneading and dispersing for 30 min; d. cleaning fumed silica powder on the wall of the kneader, locking the kneader kettle cover, starting vacuum, kneading and stirring, starting timing when the temperature of the material rises to 120 ℃, vacuumizing, kneading and dispersing for 2 hours, and finishing the dehydration and dispersion process; e. transferring the dehydrated and dispersed base glue from the kneading machine to a transfer barrel, cooling to room temperature, carrying out three-roll grinding to obtain base glue B, and sealing and storing for later use.
The pouring sealant comprises the following components in percentage by weight:
base rubber L: 1000 g; 107 (1500 cps) silicone rubber: 450g of the total weight of the mixture; dimethicone (100 cps): 300 g; iron sesquioxide: 70g of a mixture; cerium oxide: 50g of the total weight of the mixture; vinyl triacrylate oxysilane: 62g of the total weight of the mixture; methyltrtriacrylate oxysilane: 42g of the total weight of the mixture; gamma-aminopropyltriethoxysilane: 8g of the total weight of the mixture; methylvinyldiallyloxysilane: 10; 6g of tetramethylguanidinopropyltrimethoxysilane.
The preparation process of the pouring sealant comprises the following steps:
a. putting the base rubber L, 107 (1500 cps) silicon rubber, ferric oxide and cerium oxide into a power mixing stirrer according to the formula weight, and vacuumizing for dispersing for 15-20 min; b. adding 100cps dimethyl silicone oil into a power mixing stirrer, and vacuumizing for 5-10 min; c. putting the vinyl tripropenoxysilane and the methyl tripropenoxysilane into a power mixing stirrer according to the formula weight, and vacuumizing and dispersing for 20-25 min; d. putting gamma-aminopropyltriethoxysilane, methylvinyldiacryloxysilane and tetramethylguanylpropyltrimethoxysilane into a power mixing stirrer according to the formula weight, and vacuumizing and dispersing for 30-35 min; e. and sealing and subpackaging the prepared semi-finished product into 300ml of silica gel tubes to prepare the high-temperature-resistant single-component silicone pouring sealant to be tested.
And (3) testing the performance of the pouring sealant:
a. basic physical property test: performing related tests according to GB/T13477, GB/T-528 and GB/T531;
b. and (3) testing temperature resistance: pouring the pouring sealant to the head of the heating pipe, standing and curing for 24 hours, and testing the temperature resistance of the pouring sealant.
The specific test results are shown in table 1.
Table 1 results of performance testing of examples
The weight percentage of each raw material component in the invention is preferably as follows: 35.0-70.0 percent of alpha-omega-dihydroxy polydimethylsiloxane (107 silicon rubber), 10.0-30.0 percent of plasticizer, 1.0-5.0 percent of heat-resistant additive, 5.0-30.0 percent of reinforcing material, 3.0-7.0 percent of cross-linking agent, 0.5-1.5 percent of deep curing auxiliary agent and 0.1-1.0 percent of catalyst.
Wherein the alpha-omega-dihydroxy polydimethylsiloxane (107 silicon rubber) can also be one or a mixture of 107 silicon rubbers with the viscosities of 1500cps,5000cps and 20000cps at 25 ℃; the plasticizer can also be one or mixture of dimethicone with viscosity of 50cps, 100cps and 350cps at 25 deg.C; the heat-resistant additive can also be one or a mixture of ferric oxide, cerium oxide, nano titanium dioxide and soluble metal organic silicon compound; the reinforcing material can also be one or a mixture of active nano calcium carbonate, silica micropowder and gas-phase silica; the cross-linking agent can also be one or a mixture of methyl tripropenoxysilane, vinyl tripropenoxysilane and phenyl tripropenoxysilane; the deep curing assistant can also be one of dimethyl diacryloxy silane, methyl vinyl diacryloxy silane, gamma-aminopropyl triethoxysilane, N- (beta-aminoethyl) -gamma-aminopropyl trimethoxysilane or a mixture thereof.
The invention adopts a deacetone type reaction system, 107 silicon rubber and a reinforcing material are kneaded and then combined with a cross-linking agent and a catalyst, the cross-linking agent and the catalyst have the functions of forming Si-O bonds through condensation reaction in the system, the molecular chains of the silicon rubber are cross-linked with each other to form a three-dimensional network structure, the strength of the pouring sealant is improved, meanwhile, the formed high-bond energy Si-O is also beneficial to inhibiting the high-temperature decomposition degree and improving the temperature resistance of the pouring sealant, the reinforcing material has the functions of improving the body strength and improving the temperature resistance of the pouring sealant in the system, and the high-efficiency heat-resistant additive and the deep curing auxiliary agent are adopted to prepare the single-component high-temperature resistant silicone pouring sealant, the high-efficiency heat-resistant additive has the functions of inhibiting the molecular chain fracture and decomposition of the silicon rubber under high temperature, leading to strength reduction and, the deep curing assistant has the functions of improving the deep curing performance of the glue layer, improving the curing integrity of the pouring sealant, effectively improving the strength of the glue layer and improving the temperature resistance of the pouring sealant, and the prepared high-temperature-resistant single-component silicone pouring sealant has the characteristics of good fluidity, good heat resistance, good deep curing property and the like, and can be used for the potting of electric heating pipes, the potting of high-temperature electronic appliances and other potting occasions with temperature resistance requirements.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The high-temperature-resistant single-component silicone pouring sealant is characterized by comprising the following components in parts by weight: the material consists of the following raw materials in percentage by mass:
35.0 to 70.0 percent of alpha-omega-dihydroxy polydimethylsiloxane (107 silicon rubber)
10.0 to 30.0 percent of plasticizer
1.0 to 5.0 percent of heat-resistant additive
5.0 to 30.0 percent of reinforcing material
3.0 to 7.0 percent of cross-linking agent
0.5 to 1.5 percent of deep curing auxiliary agent
0.1 to 1.0 percent of catalyst.
2. The high-temperature-resistant one-component silicone pouring sealant as claimed in claim 1, wherein the α - ω -dihydroxy polydimethylsiloxane (107 silicone rubber) is 107 silicone rubber with viscosity of 1500cps,5000cps, 20000cps or a mixture thereof at 25 ℃.
3. The high-temperature-resistant one-component silicone pouring sealant as claimed in claim 1, wherein the plasticizer is one or a mixture of dimethicone having a viscosity of 50cps, 100cps and 350cps at 25 ℃.
4. The high-temperature-resistant single-component silicone pouring sealant as claimed in claim 1, wherein the heat-resistant additive is one or a mixture of ferric oxide, cerium oxide, nano titanium dioxide, and soluble metal organic silicon compound.
5. The high-temperature-resistant single-component silicone pouring sealant as claimed in claim 1, wherein the reinforcing material is one or a mixture of active nano calcium carbonate, silica micropowder and fumed silica.
6. The high-temperature-resistant single-component silicone pouring sealant as claimed in claim 1, wherein the cross-linking agent is one of methyltriprenophenoxysilane, vinyltripropenoxysilane, and phenyltripropenoxysilane, or a mixture thereof.
7. The high-temperature-resistant single-component silicone pouring sealant as claimed in claim 1, wherein the deep-layer curing assistant is one of dimethyl diacryloxysilane, methyl vinyl diacryloxysilane, gamma-aminopropyltriethoxysilane, N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane, or a mixture thereof.
8. The high temperature resistant one-component silicone potting adhesive of claim 1, wherein the catalyst is tetramethylguanylpropyltrimethoxysilane.
9. The method for preparing the high-temperature-resistant single-component silicone pouring sealant as claimed in any one of claims 1 to 8, characterized in that: the method comprises the following steps:
(1) preparing base rubber: firstly, carrying out a dispersion dehydration process, putting 107 silicon rubber and a reinforcing material into a kneader according to the weight ratio of (45.0-90.0) to (10.0-55.0), heating, vacuumizing, stirring and dispersing, wherein the temperature of the material is controlled at 120 ℃, the vacuum degree reaches-0.1 MPa, and the duration is 2.0-2.5 hours, then carrying out a three-roll grinding process, cooling the dispersed and dehydrated material to room temperature, carrying out three-roll grinding, controlling the particle size below 40um, and storing in a sealed manner for later use;
(2) adding the base rubber, the plasticizer and the heat-resistant additive into a power mixing and stirring kettle according to the formula proportion, vacuumizing, stirring and mixing uniformly;
(3) on the basis of the step (2), adding corresponding cross-linking agents according to the formula proportion, vacuumizing, stirring and mixing uniformly;
(4) on the basis of the step (3), adding the deep curing auxiliary agent and the catalyst according to the formula proportion, vacuumizing, stirring and mixing uniformly;
(5) and (4) filling and sealing to obtain the high-temperature-resistant single-component silicone pouring sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011232541.9A CN112266733A (en) | 2020-11-06 | 2020-11-06 | High-temperature-resistant single-component silicone pouring sealant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011232541.9A CN112266733A (en) | 2020-11-06 | 2020-11-06 | High-temperature-resistant single-component silicone pouring sealant and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112266733A true CN112266733A (en) | 2021-01-26 |
Family
ID=74345075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011232541.9A Pending CN112266733A (en) | 2020-11-06 | 2020-11-06 | High-temperature-resistant single-component silicone pouring sealant and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112266733A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861693A (en) * | 2021-10-24 | 2021-12-31 | 扬州晨化新材料股份有限公司 | Over-electrophoresis high-temperature-resistant sealant for automobiles and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044922A (en) * | 2012-12-31 | 2013-04-17 | 上海回天化工新材料有限公司 | Halogen-free flame retardant, high-temperature resisting and rapidly solidified deacetone silicon rubber and preparation method thereof |
| CN106753198A (en) * | 2016-11-14 | 2017-05-31 | 上海拜高高分子材料有限公司 | A kind of transparent single-component organic silicon composition of low viscosity |
| CN107629756A (en) * | 2017-09-29 | 2018-01-26 | 山东三泽硅胶有限公司 | A kind of neutral room temperature sealing silicone sulfide glue |
-
2020
- 2020-11-06 CN CN202011232541.9A patent/CN112266733A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103044922A (en) * | 2012-12-31 | 2013-04-17 | 上海回天化工新材料有限公司 | Halogen-free flame retardant, high-temperature resisting and rapidly solidified deacetone silicon rubber and preparation method thereof |
| CN106753198A (en) * | 2016-11-14 | 2017-05-31 | 上海拜高高分子材料有限公司 | A kind of transparent single-component organic silicon composition of low viscosity |
| CN107629756A (en) * | 2017-09-29 | 2018-01-26 | 山东三泽硅胶有限公司 | A kind of neutral room temperature sealing silicone sulfide glue |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861693A (en) * | 2021-10-24 | 2021-12-31 | 扬州晨化新材料股份有限公司 | Over-electrophoresis high-temperature-resistant sealant for automobiles and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103030976B (en) | Single-component heat-curing liquid silicone rubber and preparation method thereof | |
| CN103468200B (en) | Environmentally friendly two-component silicone rubber adhesive and preparation method thereof | |
| CN103396757B (en) | Single-component dealcoholization-type flame-retardant room temperature vulcanized (RTV) silicone rubber sealant and preparation method thereof | |
| CN102234427B (en) | Silicone rubber composition and preparation method of silicone rubber | |
| CN103436216B (en) | Dealcoholized organosilicone sealant with low modulus and high elongation percentage and preparation method thereof | |
| CN107286897A (en) | A kind of Single-component low-viscosity dealcoholized type organic silicon potting adhesive and preparation method thereof | |
| CN104910632A (en) | Low-temperature vulcanized heat-conducting silicone rubber and preparation method thereof | |
| CN103351627A (en) | Addition type heat-conducting silicon rubber and preparation method thereof | |
| CN105331116A (en) | One-component heating-cured liquid silicone rubber and preparation method thereof | |
| CN110699035A (en) | Preparation of room-temperature-vulcanized high-performance bi-component bonding sealing silicone adhesive | |
| CN103450689A (en) | Single-component heat-conducting flame-retardant type RTV (Room Temperature Vulcanization) silicon rubber and preparation method thereof | |
| CN113088244A (en) | Low-viscosity flowing type high-heat-conductivity flame-retardant packaging material and preparation method thereof | |
| CN106084794A (en) | Heat-conducting silica gel sheet and preparation method thereof | |
| CN104497579B (en) | One-component room temperature vulcanized organic silicon rubber with high adhesion and preparation method thereof | |
| CN112266733A (en) | High-temperature-resistant single-component silicone pouring sealant and preparation method thereof | |
| CN112662370A (en) | Single-component dealcoholized silicone sealant and preparation method thereof | |
| CN112608711A (en) | Preparation method of single-component transparent organosilicon sealant | |
| CN107325781A (en) | Silicone sealant compositions, organosilicon sealant and preparation method thereof | |
| CN107903632A (en) | A kind of room temperature vulcanization high-temperature-resisting silicon rubber and preparation method thereof | |
| CN113773497B (en) | High-temperature-resistant modified silicone adhesive and application thereof in flexible mica plate | |
| CN112724921B (en) | Low-viscosity heat-conducting flame-retardant silicone rubber sealant and preparation method thereof | |
| CN115785893A (en) | Low-dielectric organosilicon sealant and preparation method thereof | |
| CN110128999A (en) | A kind of fire-retardant bonded adhesives of one-component additional organosilicon and preparation method thereof | |
| CN110305620A (en) | A kind of dealcoholized type heat conduction organosilicon sealant and preparation method thereof | |
| CN113956835A (en) | Organosilicon sealant for U-shaped heating pipe and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210126 |
|
| RJ01 | Rejection of invention patent application after publication |