CN116694297A - Waterproof ultraviolet-resistant double-component hollow glass silicone sealant and preparation method thereof - Google Patents
Waterproof ultraviolet-resistant double-component hollow glass silicone sealant and preparation method thereof Download PDFInfo
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- CN116694297A CN116694297A CN202310785475.5A CN202310785475A CN116694297A CN 116694297 A CN116694297 A CN 116694297A CN 202310785475 A CN202310785475 A CN 202310785475A CN 116694297 A CN116694297 A CN 116694297A
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- 239000011521 glass Substances 0.000 title claims abstract description 41
- 239000004590 silicone sealant Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims description 18
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 128
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 64
- 239000007822 coupling agent Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 238000007127 saponification reaction Methods 0.000 claims abstract description 22
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229940083037 simethicone Drugs 0.000 claims abstract description 11
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 239000006229 carbon black Substances 0.000 claims abstract description 7
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 5
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 5
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 2
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 claims description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 2
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 claims description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 2
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229910000077 silane Inorganic materials 0.000 claims description 2
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 claims description 2
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 239000000565 sealant Substances 0.000 abstract description 11
- 230000032683 aging Effects 0.000 abstract description 8
- 238000003860 storage Methods 0.000 abstract description 7
- 230000006750 UV protection Effects 0.000 abstract description 4
- 239000000945 filler Substances 0.000 abstract description 3
- 238000005470 impregnation Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention relates to a double-component glass silicone sealant, in particular to a double-component hollow glass silicone sealant with excellent water resistance and ultraviolet resistance. The sealant uses heavy calcium carbonate, the saponification degree is 3-7%, and the specific surface area is 17.71-23.35 m 2 The nano calcium carbonate/g is simultaneously used as a filler, alpha, omega-dihydroxy polydimethylsiloxane and simethicone are simultaneously compounded as a component A, KH570 and KH792 after reaction under specific conditions are used as coupling agents, carbon black, simethicone, a cross-linking agent and a catalyst are simultaneously compounded as a component B, and the component A and the component B are compounded. The invention adopts the coupling agent after the mixed reaction of KH570 and KH792 to lead the two to be fully crosslinked, and simultaneously uses the saponified nano calcium carbonate as the filler to enhance the impregnation resistance of the sealantThe storage stability of the product is improved while the water and water ultraviolet aging capability is improved.
Description
Technical Field
The invention relates to the technical field of silicone sealants, in particular to a double-component hollow glass silicone sealant, and especially relates to a double-component hollow glass silicone sealant with excellent water resistance and ultraviolet resistance.
Background
The hollow glass is formed by two or three pieces of glass, the periphery of the glass is bonded and sealed by using an adhesive, the glass pieces are bonded with a metal frame containing a drying agent, such as an aluminum alloy frame, and meanwhile, inert gas is filled between the glass layers, so that a dry inert gas space is formed between the glass layers, and the high-efficiency sound-insulation heat-insulation hollow glass system is manufactured. The hollow glass system has good heat insulation and sound insulation performance, is attractive and comfortable, can reduce the dead weight of a building, and is a novel building material.
The double-component hollow glass sealant has the characteristics of good extrudability, high curing speed, good adhesion, good sealability and the like, and is widely applied to the sealing and manufacturing processes of hollow glass for buildings, but the double-component hollow glass silicone sealant sold on the market at present has the following general problems: after soaking and ultraviolet ageing, the conditions of large-area debonding and greatly reduced strength and obviously reduced strength and elongation of the glass can occur, so that the hollow glass is not broken as much as possible after being used for a few years, but the hollow glass has no possibility of functioning as the hollow glass, and therefore, the service life of the hollow glass is definitely dependent on the sealing property and the structural stability of a hollow glass system. In conclusion, the method has important significance on how to improve the water resistance and ultraviolet resistance of the hollow glass sealant.
Disclosure of Invention
Based on the above, the invention aims to provide a two-component hollow glass silicone sealant with excellent water resistance and ultraviolet resistance, which can still maintain excellent adhesive performance after soaking and water ultraviolet aging, and has storage stability of more than 6 months.
The invention realizes the technical purposes through the following technical proposal: the invention provides a waterproof ultraviolet-resistant double-component hollow glass silicone sealant which is prepared by mixing a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 20-30 parts of alpha, omega-dihydroxypolydimethylsiloxane, 8-10 parts of simethicone, 45-50 parts of nano calcium carbonate and 50-65 parts of heavy calcium carbonate, wherein the viscosity of the alpha, omega-dihydroxypolydimethylsiloxane is 10000-50000 mPa.S, the saponification degree of the nano calcium carbonate is 3-7%, and the specific surface area is 17.71-23.35 m 2 Nano calcium carbonate per gram;
the component B is prepared from the following raw materials in parts by weight: 20-40 parts of carbon black, 40-60 parts of dimethyl silicone oil, 6-8 parts of coupling agent, 4-6 parts of cross-linking agent and 0.2-0.3 part of catalyst, wherein the coupling agent is prepared by mixing coupling agents KH570 and KH792 according to the mass ratio of 1 (1-3), stirring and reacting for 3-5 h at 70-90 ℃, cooling to 30-50 ℃ and preserving heat for 8h, and the catalyst is an organotin catalyst.
As a preferred embodiment, the preparation method of the nano calcium carbonate in the component A comprises the following steps: the specific surface is 17.71-23.35 m 2 Per 100g of nano calcium carbonateAdding 3-5 g stearic acid and 3-7 g sodium hydroxide into calcium carbonate, and performing saponification reaction at 70-90 ℃ to obtain the calcium carbonate.
As a preferred embodiment, the particle size of the heavy calcium carbonate in the component A is 200-300 meshes.
As a preferred embodiment, the crosslinking agent in the B component is selected from one or more of dimethyldimethoxy silane, methyltrimethoxy silane, methyltributylketon oximido silane, isopropyl silicate and vinyltrimethoxy silane;
the catalyst in the component B is selected from one or more of dibutyl tin dilaurate, stannous octoate and dibutyl tin diacetate.
The invention also provides a preparation method of the waterproof ultraviolet-resistant double-component hollow glass silicone sealant, wherein the preparation method of the component A is as follows: adding alpha, omega-dihydroxyl polydimethylsiloxane (107 glue), simethicone, heavy calcium carbonate and nano calcium carbonate into a dynamic mixer, and stirring in vacuum to obtain the nano calcium carbonate;
the preparation method of the component B comprises the following steps: adding the carbon black, the simethicone, the coupling agent and the crosslinking agent into a dynamic mixer, adding the catalyst after vacuum stirring, and vacuum stirring again to obtain the catalyst.
Compared with the prior art, the invention has the beneficial effects that:
the waterproof ultraviolet-resistant double-component hollow glass silicone sealant provided by the invention uses heavy calcium carbonate and has the saponification degree of 3-7% and the specific surface area of 17.71-23.35 m 2 The nano calcium carbonate/g is simultaneously used as a filler, alpha, omega-dihydroxy polydimethylsiloxane and simethicone are simultaneously compounded as a component A, KH570 and KH792 after reaction under specific conditions are used as coupling agents, carbon black, simethicone, a cross-linking agent and a catalyst are simultaneously compounded as a component B, and the component A and the component B are compounded. KH570 and KH792 are mixed and reacted before use, so that a proper amount of long-chain coupling agent is generated by the reaction of the KH570 and the KH792, the crosslinking is ensured to be more sufficient, the adhesive property of the product is enhanced, and the capability of resisting soaking and water ultraviolet aging is improved; the nano calcium carbonate after saponification treatment is used, so that the calcium carbonate and the alpha, omega-dihydroxypolydimethylsiloxane (107 glue) can be usedThe product has better compatibility, avoids caking, improves the storage stability of the product, and simultaneously greatly improves the strength retention of the product after soaking and water ultraviolet aging; and an organotin catalyst is adopted, so that the two-component system can realize rapid solidification and reach the required strength.
Detailed Description
The present invention will be described in further detail with reference to specific examples so as to more clearly understand the present invention by those skilled in the art.
The following examples are given for illustration of the invention only and are not intended to limit the scope of the invention. All other embodiments obtained by those skilled in the art without creative efforts are within the protection scope of the present invention based on the specific embodiments of the present invention.
In the examples of the present invention, all raw material components are commercially available products well known to those skilled in the art unless specified otherwise; in the embodiments of the present invention, unless specifically indicated, all technical means used are conventional means well known to those skilled in the art.
Example 1
The embodiment provides a water-resistant ultraviolet-resistant double-component hollow glass silicone sealant, the reaction raw materials of which are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 17.71m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 17.71m 2 Nano calcium carbonate per gram;
the coupling agent is prepared by the following method: mixing the coupling agent KH570 and KH792 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The preparation method of the component A comprises the following steps: adding alpha, omega-dihydroxyl polydimethylsiloxane (107 glue), simethicone, heavy calcium carbonate and saponified nano calcium carbonate into a dynamic mixer, stirring at a low speed for 20 minutes, scraping the wall once, stirring at a high speed for 30 minutes, scraping the wall once again, stirring at a high speed for 30 minutes in vacuum, discharging the glue, and storing the component A into a 1L white plastic small barrel;
the preparation method of the component B comprises the following steps: adding carbon black, dimethyl silicone oil, a coupling agent and a cross-linking agent into a dynamic mixer, stirring for 30 minutes in vacuum, adding a catalyst, stirring for 10 minutes again in vacuum, and pressing the component B into a rubber tube for sealing and storing after the reaction is finished.
Example 2
The embodiment provides a water-resistant ultraviolet-resistant double-component hollow glass silicone sealant, the reaction raw materials of which are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 18.35m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 18.35m 2 Nano calcium carbonate per gram;
the coupling agent is prepared by the following method: mixing the coupling agent KH570 and KH792 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The specific preparation method of the A component and the B component is the same as in example 1.
Example 3
The embodiment provides a water-resistant ultraviolet-resistant double-component hollow glass silicone sealant, the reaction raw materials of which are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 23.35m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 23.35m 2 Nano calcium carbonate per gram;
the coupling agent is prepared by the following method: mixing the coupling agent KH570 and KH792 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The specific preparation method of the A component and the B component is the same as in example 1.
Comparative example 1
The present comparative example provides a silicone sealant which is mainly different from examples 1 to 3 in that the addition amount of the coupling agent is small, and the reaction raw materials thereof are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 17.71m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 17.71m 2 Nano calcium carbonate per gram;
the coupling agent is prepared by the following method: mixing the coupling agent KH570 and KH792 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The specific preparation method of the A component and the B component is the same as in example 1.
Comparative example 2
The comparative example provides a silicone sealant, which is mainly different from the examples in that nano calcium carbonate is not subjected to saponification treatment, and the reaction raw materials are shown in the following table:
wherein the specific surface area of the nano calcium carbonate which is not treated is 17.71m 2 Nano calcium carbonate per gram; the coupling agent is prepared by the following method: mixing the coupling agent KH570 and KH792 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The specific preparation method of the A component and the B component is the same as in example 1.
Comparative example 3
The comparative example provides a silicone sealant which is mainly different from the examples in that the coupling agent is directly added without pre-reaction, and the reaction raw materials are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 17.71m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 17.71m 2 /g of nano calcium carbonate.
The specific preparation method of the A component and the B component is the same as in example 1.
Comparative example 4
The comparative example provides a silicone sealant which is mainly different from the examples in that no heavy calcium carbonate is added to the A component, and the reaction raw materials are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 17.71m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 17.71m 2 Nano calcium carbonate per gram;
the coupling agent is prepared by the following method: mixing the coupling agent KH570 and KH792 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The specific preparation method of the A component and the B component is the same as in example 1.
Comparative example 5
The main difference between the silicone sealant and the examples is that the component A does not contain heavy calcium carbonate, the coupling agents in the component B are KH560 and KH550, and the reaction raw materials are shown in the following table:
wherein, the nano calcium carbonate is prepared by the following method: the specific surface area was 17.71m 2 Every 100g of nano calcium carbonate is added with 4g of stearic acid and 5g of sodium hydroxide to carry out saponification reaction at 80 ℃ to obtain the nano calcium carbonate with the saponification degree of 5 percent and the specific surface area of 17.71m 2 Nano calcium carbonate per gram;
the coupling agent is prepared by the following method: mixing the coupling agents KH560 and KH550 according to the mass ratio of 1:2, stirring and reacting for 4 hours at 80 ℃, cooling to 40 ℃, and preserving heat for 8 hours to obtain the catalyst.
The specific preparation method of the A component and the B component is the same as in example 1.
Performance test:
the A component and the B component in each example and comparative example are mixed according to the volume ratio of 10:1, prepared into samples with both sides being glass substrates according to the standard GB/T13477.10-2017, cured for 14 days in the environment with the temperature of 23 ℃ and the humidity of 50%, subjected to a water immersion test and a water ultraviolet test according to the standard GB/T13477.11-2017 and the standard GB/T13477.15-2017, and compared with the commercially available hollow glass sealants, and the test results are shown in the following table 1:
table 1 results of performance test of sealants prepared in examples and comparative examples
As can be seen from the above Table 1, the hollow glass sealants prepared in examples 1 to 4 of the present invention have excellent extrusion properties, are suitable for curing time in the production process of hollow glass, and compared with the commercial products and comparative examples, the sealant has still better adhesive properties after immersion and water ultraviolet aging, has improved retention of tensile strength and elongation at break, and can maintain excellent adhesive properties after immersion and water ultraviolet aging, the water resistance and ultraviolet aging resistance of the sealant are far superior to those of the commercial products, the storage stability of the A component is also superior to that of the commercial products, and the storage stability of the A component can reach more than 6 months without thickening phenomenon, and can meet the demands of the commercial products.
The sealant prepared in comparative examples 1 and 3 has poor storage stability after being immersed in water and aged by water and ultraviolet, the sealant prepared in comparative example 2 has poor storage stability, is difficult to meet the market circulation requirement, and the sealant prepared in comparative examples 4 and 5 has large adhesive viscosity, is low in extrusion after mixing, and cannot meet the actual adhesive using process of hollow glass.
It should be noted that the above examples are only for further illustrating and describing the technical solution of the present invention, and are not intended to limit the technical solution of the present invention, and the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. 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 (5)
1. A water-resistant ultraviolet-resistant double-component hollow glass silicone sealant is characterized by being prepared by mixing a component A and a component B,
the component A is prepared from the following raw materials in parts by weight: 20-30 parts of alpha, omega-dihydroxypolydimethylsiloxane, 8-10 parts of simethicone, 45-50 parts of nano calcium carbonate and 50-65 parts of heavy calcium carbonate, wherein the viscosity of the alpha, omega-dihydroxypolydimethylsiloxane is 10000-50000 mPa.S, the saponification degree of the nano calcium carbonate is 3-7%, and the specific surface area is 17.71-23.35 m 2 Nano calcium carbonate per gram;
the component B is prepared from the following raw materials in parts by weight: 20-40 parts of carbon black, 40-60 parts of dimethyl silicone oil, 6-8 parts of coupling agent, 4-6 parts of cross-linking agent and 0.2-0.3 part of catalyst, wherein the coupling agent is prepared by mixing coupling agents KH570 and KH792 according to the mass ratio of 1 (1-3), stirring and reacting for 3-5 h at 70-90 ℃, cooling to 30-50 ℃ and preserving heat for 8h, and the catalyst is an organotin catalyst.
2. The water-resistant ultraviolet-resistant two-component hollow glass silicone sealant according to claim 1, wherein the preparation method of the nano calcium carbonate in the component A is as follows: the specific surface is 17.71-23.35 m 2 3-5 g stearic acid and 3-7 g sodium hydroxide are added into every 100g nano calcium carbonate to carry out saponification reaction at 70-90 ℃ to obtain the nano calcium carbonate.
3. The water-resistant ultraviolet-resistant two-component hollow glass silicone sealant according to any one of claims 1 to 2, wherein the particle size of heavy calcium carbonate in the component A is 200 to 300 meshes.
4. The water-resistant ultraviolet-resistant two-component hollow glass silicone sealant according to any one of claims 1 to 2, characterized in that,
the cross-linking agent in the component B is selected from one or more of dimethyl dimethoxy silane, methyl trimethoxy silane, methyl tributyl ketoxime silane, isopropyl silicate and vinyl trimethoxy silane;
the catalyst in the component B is selected from one or more of dibutyl tin dilaurate, stannous octoate and dibutyl tin diacetate.
5. The method for preparing the water-resistant ultraviolet-resistant two-component hollow glass silicone sealant according to any one of claims 1 to 4, wherein the preparation method of the component A is as follows: adding alpha, omega-dihydroxyl polydimethylsiloxane (107 glue), simethicone, heavy calcium carbonate and nano calcium carbonate into a dynamic mixer, and stirring in vacuum to obtain the nano calcium carbonate;
the preparation method of the component B comprises the following steps: adding the carbon black, the simethicone, the coupling agent and the crosslinking agent into a dynamic mixer, adding the catalyst after vacuum stirring, and vacuum stirring again to obtain the catalyst.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310785475.5A CN116694297A (en) | 2023-06-29 | 2023-06-29 | Waterproof ultraviolet-resistant double-component hollow glass silicone sealant and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310785475.5A CN116694297A (en) | 2023-06-29 | 2023-06-29 | Waterproof ultraviolet-resistant double-component hollow glass silicone sealant and preparation method thereof |
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| CN116694297A true CN116694297A (en) | 2023-09-05 |
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| CN202310785475.5A Pending CN116694297A (en) | 2023-06-29 | 2023-06-29 | Waterproof ultraviolet-resistant double-component hollow glass silicone sealant and preparation method thereof |
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| CN (1) | CN116694297A (en) |
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