CN113462351A - Semitransparent silicone sealant for copper products and preparation method thereof - Google Patents
Semitransparent silicone sealant for copper products and preparation method thereof Download PDFInfo
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- CN113462351A CN113462351A CN202111029122.XA CN202111029122A CN113462351A CN 113462351 A CN113462351 A CN 113462351A CN 202111029122 A CN202111029122 A CN 202111029122A CN 113462351 A CN113462351 A CN 113462351A
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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
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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
- 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
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention relates to the technical field of sealants, in particular to a semitransparent silicone sealant for copper products and a preparation method thereof. The feed comprises the following raw materials: anticorrosion modifier, hydroxy polydimethylsiloxane, copolymer resin, filler, compatilizer and solvent; the anticorrosive modifier comprises the following raw materials: rosin resin, natural rubber, polybutadiene, glycerin, polytetrafluoroethylene, dibutyl phthalate, and barium petroleum sulfonate; according to the semitransparent silicone sealant for the copper product and the preparation method thereof, the corrosion resistance of the silicone sealant to the copper product can be enhanced by adding the corrosion prevention modifier, wherein the contained barium petroleum sulfonate with excellent rust prevention property and polytetrafluoroethylene with excellent corrosion inhibition property are mixed with rosin resin and natural rubber to modify the resin, and the modified resin is mixed with hydroxy polydimethylsiloxane to further increase the caking property and the corrosion prevention property of the silicone sealant.
Description
Technical Field
The invention relates to the technical field of sealants, in particular to a semitransparent silicone sealant for copper products and a preparation method thereof.
Background
With the continuous development of the door and window industry, aluminum alloy materials, plastics and copper materials become indispensable material types in the door and window manufacturing process, silicone sealant has the effect of sealing joints between doors and windows and glass, and the silicone sealant becomes a preferred sealing material for copper doors and windows with good ultraviolet resistance, elastic recovery capacity, excellent adhesion and weather resistance.
The existing silicone sealant consists of sodium silicate, acetic acid and organic silicone, and the acidity of the silicone sealant can generate corrosivity on copper doors and windows in the use process of the silicone sealant, so that corrosive gas is adsorbed on door and window materials, the materials are corroded, the position where the silicone sealant is contacted with the copper doors and windows can generate verdigris, the attractiveness of the copper doors and windows is lost, and the material structure of the copper doors and windows is damaged.
Disclosure of Invention
The invention aims to provide a semitransparent silicone sealant for copper products and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the above object, in one aspect, the present invention provides a translucent silicone sealant for copper products and a preparation method thereof, wherein the translucent silicone sealant comprises the following raw materials: 10-20 parts of anticorrosive modifier, 40-70 parts of hydroxy polydimethylsiloxane, 1-10 parts of copolymer resin, 15-25 parts of filler, 0.1-0.5 part of compatilizer and 15-22 parts of solvent;
the anticorrosion modifier comprises the following raw materials: 10-15% of rosin resin, 10-15% of natural rubber, 1-5% of polybutadiene, 5-9% of glycerol, 1-5% of polytetrafluoroethylene, 0.1-3% of dibutyl phthalate and 0.1-2% of barium petroleum sulfonate, and is used for enhancing the corrosion resistance of the silicone sealant to copper products.
As a further improvement of the technical scheme, the preparation method of the anticorrosion modifier comprises the following steps:
s1.1, adding rosin resin and natural rubber into a stirring kettle, heating and melting, adding a dispersing agent, stirring and mixing to prepare a base solution;
s1.2, sequentially adding polybutadiene, glycerin, polytetrafluoroethylene, dibutyl phthalate and barium petroleum sulfonate into the base solution, and stirring and mixing to obtain the anticorrosive modifier.
As a further improvement of the technical scheme, in S1.1, the heating temperature of the stirring kettle is 130-180 ℃, and the dispersing agent is silicate; in the S1.2, the stirring temperature is 110-150 ℃, the stirring speed is 37-46r/min, and the stirring time is 3-5 h.
As a further improvement of the technical scheme, the copolymer resin is prepared by mixing epoxy resin, acrylic resin and polyurethane resin, and can improve the viscosity and strength of the sealant by blending with hydroxy polydimethylsiloxane.
As a further improvement of the technical scheme, the filler is selected from one or more of calcium carbonate, silica, mica powder, wollastonite, kaolin and quartz powder for enhancing the strength of the sealant.
As a further improvement of the technical scheme, the compatilizer is selected from maleic anhydride grafting agents and is used for improving the compatibility between hydroxy polydimethylsiloxane and other materials.
As a further improvement of the technical scheme, the solvent is one or more of dimethylbenzene, turpentine, absolute ethyl alcohol and ethyl ether, so that the effect of diluting the sealant is achieved, and the viscosity of the sealant is adjusted.
In another aspect, the present invention provides a method for preparing a translucent silicone sealant for copper products as described in any one of the above, comprising the steps of:
s2.1, adding hydroxy polydimethylsiloxane into a kneading machine for kneading to obtain a base material;
s2.2, adding the base material, the anticorrosive modifier, the copolymer resin, the filler, the compatilizer and the solvent into a stirrer, and stirring and mixing under vacuum;
and S2.3, reacting the anticorrosion modifier with the copolymer resin after mixing for 1-2h to obtain filling resin, and adjusting the pH value to 7-8 after reacting for 2-3h to obtain the silicone sealant.
Preferably, in S2.1, the kneader temperature is 120-140 ℃, and the kneading time is 1-2 h.
Preferably, in the S2.2, the stirring temperature is 90-110 ℃, and the vacuum degree is 0.05-0.08 MPa.
The epoxy resin or acrylic resin can react with polybutadiene and polytetrafluoroethylene in the anticorrosion modifier to generate the filling resin with high corrosion resistance, heat resistance and viscosity, and the filling resin is used in the sealant and can further improve the anticorrosion property of the silicone sealant to copper products.
Compared with the prior art, the invention has the beneficial effects that:
according to the semitransparent silicone sealant for the copper product and the preparation method thereof, the corrosion resistance of the silicone sealant to the copper product can be enhanced by adding the corrosion prevention modifier, wherein the contained barium petroleum sulfonate with excellent rust prevention property and polytetrafluoroethylene with excellent corrosion inhibition property are mixed with rosin resin and natural rubber to modify the resin, and the modified resin is mixed with hydroxy polydimethylsiloxane to further increase the caking property and the corrosion prevention property of the silicone sealant.
Drawings
FIG. 1 is an overall flow diagram of the present invention;
FIG. 2 is a block diagram of the preparation process of the corrosion inhibitor modifier of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1 a translucent silicone sealant for copper products and a preparation method thereof, comprising:
preparation of anticorrosion modifier
Adding 10% of rosin resin and 10% of natural rubber into a stirring kettle, heating to 130 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 1% of polybutadiene, 5% of glycerol, 1% of polytetrafluoroethylene, 0.1% of dibutyl phthalate and 0.1% of barium petroleum sulfonate into the base solution, heating to 110 ℃, and stirring for 3 hours and mixing under the condition that the speed is 37r/min to prepare the anticorrosive modifier.
Second, preparation of sealant
Adding 70 parts of hydroxy polydimethylsiloxane into a kneader, heating to 120 ℃, and kneading for 1h to obtain a base material; adding the base material, 10 parts of anticorrosive modifier, 1 part of copolymer resin, 15 parts of filler, 0.1 part of compatilizer and 15 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.05 MPa; and (3) after mixing for 1h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 2h, adjusting the pH value to 7 to obtain the silicone sealant.
Embodiment 2 a translucent silicone sealant for copper products and a preparation method thereof, comprising:
preparation of anticorrosion modifier
Adding 11% of rosin resin and 11% of natural rubber into a stirring kettle, heating to 140 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 2% of polybutadiene, 6% of glycerol, 2% of polytetrafluoroethylene, 1% of dibutyl phthalate and 0.5% of barium petroleum sulfonate into the base solution, heating to 120 ℃, and stirring for 3.5 hours and mixing under the condition that the speed is 39r/min to prepare the anticorrosive modifier.
Second, preparation of sealant
Adding 62.5 parts of hydroxy polydimethylsiloxane into a kneader, heating to 125 ℃, and kneading for 1h to obtain a base material; adding the base material, 12.5 parts of anticorrosive modifier, 3 parts of copolymer resin, 17.5 parts of filler, 0.2 part of compatilizer and 17 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.06 MPa; and (3) after mixing for 1h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 2h, adjusting the pH value to 7 to obtain the silicone sealant.
Embodiment 3 a translucent silicone sealant for copper products and a method for preparing the same, comprising:
preparation of anticorrosion modifier
Adding 12.5 percent of rosin resin and 12.5 percent of natural rubber into a stirring kettle, heating to 150 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 3% of polybutadiene, 7% of glycerol, 3% of polytetrafluoroethylene, 1.5% of dibutyl phthalate and 1% of barium petroleum sulfonate into the base solution, heating to 130 ℃, and stirring for 4 hours and mixing under the condition that the speed is 42r/min to prepare the anticorrosive modifier.
Second, preparation of sealant
Adding 55 parts of hydroxy polydimethylsiloxane into a kneader, heating to 130 ℃, and kneading for 1.5h to obtain a base material; adding 15 parts of base stock, 15 parts of anticorrosion modifier, 5 parts of copolymer resin, 20 parts of filler, 0.3 part of compatilizer and 19 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.07 MPa; and (3) after mixing for 1.5h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 2.5h, adjusting the pH value to 7.5 to obtain the silicone sealant.
Embodiment 4 a translucent silicone sealant for copper products and a method for preparing the same, comprising:
preparation of anticorrosion modifier
Adding 14 percent of rosin resin and 14 percent of natural rubber into a stirring kettle, heating to 170 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 4% of polybutadiene, 8% of glycerol, 4% of polytetrafluoroethylene, 2% of dibutyl phthalate and 1.5% of barium petroleum sulfonate into the base solution, heating to 140 ℃, and stirring for 5 hours and mixing under the condition that the speed is 44r/min to prepare the anticorrosive modifier.
Second, preparation of sealant
Adding 47.5 parts of hydroxy polydimethylsiloxane into a kneader, heating to 135 ℃, and kneading for 2 hours to obtain a base material; adding the base material, 17.5 parts of anticorrosive modifier, 7 parts of copolymer resin, 22.5 parts of filler, 0.4 part of compatilizer and 21 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.08 MPa; and (3) after mixing for 2h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 3h, adjusting the pH value to 8 to obtain the silicone sealant.
Embodiment 5 a translucent silicone sealant for copper articles and method of making the same, comprising:
preparation of anticorrosion modifier
Adding 15% of rosin resin and 15% of natural rubber into a stirring kettle, heating to 180 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 5% of polybutadiene, 9% of glycerol, 5% of polytetrafluoroethylene, 3% of dibutyl phthalate and 2% of barium petroleum sulfonate into the base solution, heating to 150 ℃, and stirring for 5 hours and mixing under the condition that the speed is 46r/min to prepare the anticorrosion modifier.
Second, preparation of sealant
Adding 40 parts of hydroxy polydimethylsiloxane into a kneader, heating to 140 ℃, and kneading for 2 hours to obtain a base material; adding base material, 20 parts of anticorrosive modifier, 10 parts of copolymer resin, 25 parts of filler, 0.5 part of compatilizer and 22 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.08 MPa; and (3) after mixing for 2h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 3h, adjusting the pH value to 8 to obtain the silicone sealant.
In the above examples 1-5, the copolymer resin is prepared by mixing epoxy resin, acrylic resin and polyurethane resin, and can be blended with hydroxy polydimethylsiloxane to improve the viscosity and strength of the sealant;
the filler is selected from one or more of calcium carbonate, silicon dioxide, mica powder, wollastonite, kaolin and quartz powder for enhancing the strength of the sealant;
the compatilizer is selected from maleic anhydride grafting agents and is used for improving the compatibility between hydroxy polydimethylsiloxane and other materials;
the solvent is selected from one or more of dimethylbenzene, turpentine, absolute ethyl alcohol and ether, so that the effect of diluting the sealant is achieved, and the viscosity of the sealant is adjusted;
the epoxy resin or acrylic resin can react with polybutadiene and polytetrafluoroethylene in the anticorrosion modifier to generate the filling resin with high corrosion resistance, heat resistance and viscosity, and the filling resin is used in the sealant and can further improve the anticorrosion property of the silicone sealant to copper products.
The indexes related to the semitransparent silicone sealant for copper products prepared by the invention are shown in the following table 1:
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Tensile strength (Mpa) | 3.69 | 3.90 | 4.18 | 3.99 | 3.83 |
| Elongation at Break (%) | 318 | 333 | 358 | 342 | 319 |
| Adhesive strength (Mpa) | 115 | 120 | 128 | 124 | 120 |
| Peel strength (Mpa) | 45 | 49 | 53 | 50 | 48 |
As shown in Table 1, the translucent silicone sealants for copper products prepared in examples 1-5 of the present invention all have good tensile strength and elongation at break, which indicates that the sealant of the present invention has good mechanical properties and good adhesive strength and peel strength, wherein the strength and adhesiveness of the sealant are the best when 55 parts of hydroxy polydimethylsiloxane, 15 parts of anticorrosion modifier, 5 parts of copolymer resin, 20 parts of filler, 0.3 part of compatilizer and 19 parts of solvent are used.
Comparative example 1 a translucent silicone sealant and a method of preparing the same comprising:
1. adding 55 parts of hydroxy polydimethylsiloxane into a kneader, heating to 130 ℃, and kneading for 1.5h to obtain a base material;
2. adding the base material, 5 parts of copolymer resin, 20 parts of filler, 0.3 part of compatilizer and 19 parts of solvent into a stirrer, stirring and mixing under the condition that the vacuum degree is 0.07MPa, and adjusting the pH value to 7.5 to obtain the silicone sealant.
Comparative example 2 a translucent silicone sealant and a method of preparing the same comprising:
preparation of anticorrosion modifier
Adding 12.5 percent of rosin resin and 12.5 percent of natural rubber into a stirring kettle, heating to 150 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 3% of polybutadiene, 7% of glycerol, 1.5% of dibutyl phthalate and 1% of barium petroleum sulfonate into the base liquid, heating to 130 ℃, and stirring for 4 hours for mixing under the condition that the speed is 42r/min to prepare the anticorrosion modifier.
Second, preparation of sealant
Adding 55 parts of hydroxy polydimethylsiloxane into a kneader, heating to 130 ℃, and kneading for 1.5h to obtain a base material; adding 15 parts of base stock, 15 parts of anticorrosion modifier, 5 parts of copolymer resin, 20 parts of filler, 0.3 part of compatilizer and 19 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.07 MPa; and (3) after mixing for 1.5h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 2.5h, adjusting the pH value to 7.5 to obtain the silicone sealant.
Comparative example 3 a translucent silicone sealant and a method of preparing the same comprising:
preparation of anticorrosion modifier
Adding 12.5 percent of rosin resin and 12.5 percent of natural rubber into a stirring kettle, heating to 150 ℃ for melting, adding a silicate dispersant, and stirring and mixing to prepare a base solution; sequentially adding 3% of polybutadiene, 7% of glycerol, 3% of polytetrafluoroethylene and 1.5% of dibutyl phthalate into the base solution, heating to 130 ℃, and stirring for 4 hours and mixing under the condition that the speed is 42r/min to prepare the anticorrosion modifier.
Second, preparation of sealant
Adding 55 parts of hydroxy polydimethylsiloxane into a kneader, heating to 130 ℃, and kneading for 1.5h to obtain a base material; adding 15 parts of base stock, 15 parts of anticorrosion modifier, 5 parts of copolymer resin, 20 parts of filler, 0.3 part of compatilizer and 19 parts of solvent into a stirrer, and stirring and mixing under the condition that the vacuum degree is 0.07 MPa; and (3) after mixing for 1.5h, reacting the anticorrosive modifier with the copolymer resin to obtain filling resin, and after reacting for 2.5h, adjusting the pH value to 7.5 to obtain the silicone sealant.
The semitransparent silicone sealant for copper products prepared by the invention has better strength, can reduce the corrosivity to copper metals when being applied to the copper metals, has a larger relation with an anticorrosion modifier added into the sealant, and in order to verify the related technical scheme, the applicant performs the following tests, and the following tests are specifically shown in a table 2:
TABLE 2
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Example 3 | |
| Tensile Strength (MPa) | 4.00 | 4.08 | 4.10 | 4.18 |
| Elongation at Break (%) | 337 | 342 | 346 | 358 |
| Adhesive strength (Mpa) | 70 | 102 | 127 | 128 |
| Peel strength (Mpa) | 30 | 44 | 53 | 53 |
| Copper sheet after 45 daysSurface area of Aerugo (%) | 7.60 | 6.23 | 5.93 | 0.77 |
According to the table 2, in comparative examples 1 to 3, compared with example 3, when the corrosion inhibitor modifier is removed alone in comparative example 1, the adhesive property of the sealant is greatly reduced, when the polytetrafluoroethylene in the corrosion inhibitor modifier is removed alone in comparative example 2, and the barium petroleum sulfonate in the corrosion inhibitor modifier is removed alone in comparative example 3, the adhesive property of the sealant is also reduced to different degrees, but in comparative examples 1 to 3, after the sealant completely removed from the corrosion inhibitor modifier is applied to a copper sheet for 45 days, the surface patina area of the copper sheet reaches 7.60% at the maximum, so that it can be seen that the important factors of the invention for improving the adhesive property and the corrosion resistance of the sealant are improved when the corrosion inhibitor modifier is added into the sealant.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The translucent silicone sealant for the copper product is characterized by comprising the following raw materials: 10-20 parts of anticorrosive modifier, 40-70 parts of hydroxy polydimethylsiloxane, 1-10 parts of copolymer resin, 15-25 parts of filler, 0.1-0.5 part of compatilizer and 15-22 parts of solvent;
the anticorrosion modifier comprises the following raw materials: 10-15% of rosin resin, 10-15% of natural rubber, 1-5% of polybutadiene, 5-9% of glycerol, 1-5% of polytetrafluoroethylene, 0.1-3% of dibutyl phthalate and 0.1-2% of barium petroleum sulfonate.
2. The translucent silicone sealant for copper articles as claimed in claim 1, wherein: the preparation method of the anticorrosion modifier comprises the following steps:
s1.1, adding rosin resin and natural rubber into a stirring kettle, heating and melting, adding a dispersing agent, stirring and mixing to prepare a base solution;
s1.2, sequentially adding polybutadiene, glycerin, polytetrafluoroethylene, dibutyl phthalate and barium petroleum sulfonate into the base solution, and stirring and mixing to obtain the anticorrosive modifier.
3. The translucent silicone sealant for copper articles as claimed in claim 2, wherein: in the S1.1, the heating temperature of the stirring kettle is 130-180 ℃, and the dispersing agent is silicate; in the S1.2, the stirring temperature is 110-150 ℃, the stirring speed is 37-46r/min, and the stirring time is 3-5 h.
4. The translucent silicone sealant for copper articles as claimed in claim 1, wherein: the copolymer resin is prepared by mixing epoxy resin, acrylic resin and polyurethane resin.
5. The translucent silicone sealant for copper articles as claimed in claim 1, wherein: the filler is selected from one or more of calcium carbonate, silicon dioxide, mica powder, wollastonite, kaolin and quartz powder.
6. The translucent silicone sealant for copper articles as claimed in claim 1, wherein: the compatilizer is selected from maleic anhydride grafting agents.
7. The translucent silicone sealant for copper articles as claimed in claim 1, wherein: the solvent is one or more selected from xylene, turpentine, anhydrous ethanol and diethyl ether.
8. A method for preparing the translucent silicone sealant for copper products as claimed in any one of claims 1-7, characterized by comprising the following steps:
s2.1, adding hydroxy polydimethylsiloxane into a kneading machine for kneading to obtain a base material;
s2.2, adding the base material, the anticorrosive modifier, the copolymer resin, the filler, the compatilizer and the solvent into a stirrer, and stirring and mixing under vacuum;
and S2.3, reacting the anticorrosion modifier with the copolymer resin after mixing for 1-2h to obtain filling resin, and adjusting the pH value to 7-8 after reacting for 2-3h to obtain the silicone sealant.
9. The method for preparing the translucent silicone sealant for copper products as claimed in claim 8, wherein: in the S2.1, the temperature of the kneader is 120-140 ℃, and the kneading time is 1-2 h.
10. The method for preparing the translucent silicone sealant for copper products as claimed in claim 8, wherein: in the S2.2, the stirring temperature is 90-110 ℃, and the vacuum degree is 0.05-0.08 MPa.
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Application publication date: 20211001 |