CN117327469A - High-strength low-density room temperature vulcanized rubber as well as preparation method and application thereof - Google Patents
High-strength low-density room temperature vulcanized rubber as well as preparation method and application thereof Download PDFInfo
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- CN117327469A CN117327469A CN202311194335.7A CN202311194335A CN117327469A CN 117327469 A CN117327469 A CN 117327469A CN 202311194335 A CN202311194335 A CN 202311194335A CN 117327469 A CN117327469 A CN 117327469A
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- Prior art keywords
- room temperature
- vulcanized rubber
- strength low
- density room
- temperature vulcanized
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- 239000004636 vulcanized rubber Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229920002050 silicone resin Polymers 0.000 claims abstract description 32
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 28
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 28
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 239000007822 coupling agent Substances 0.000 claims abstract description 7
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 6
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 6
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 claims description 6
- 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 description 5
- 229940083037 simethicone Drugs 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 4
- 239000013522 chelant Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 claims description 4
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- CQQXCSFSYHAZOO-UHFFFAOYSA-L [acetyloxy(dioctyl)stannyl] acetate Chemical compound CCCCCCCC[Sn](OC(C)=O)(OC(C)=O)CCCCCCCC CQQXCSFSYHAZOO-UHFFFAOYSA-L 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- 235000010215 titanium dioxide Nutrition 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- QUVMSYUGOKEMPX-UHFFFAOYSA-N 2-methylpropan-1-olate;titanium(4+) Chemical compound [Ti+4].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-] QUVMSYUGOKEMPX-UHFFFAOYSA-N 0.000 claims description 2
- HXLAEGYMDGUSBD-UHFFFAOYSA-N 3-[diethoxy(methyl)silyl]propan-1-amine Chemical compound CCO[Si](C)(OCC)CCCN HXLAEGYMDGUSBD-UHFFFAOYSA-N 0.000 claims description 2
- ZYAASQNKCWTPKI-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propan-1-amine Chemical compound CO[Si](C)(OC)CCCN ZYAASQNKCWTPKI-UHFFFAOYSA-N 0.000 claims description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 2
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 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
- NBJODVYWAQLZOC-UHFFFAOYSA-L [dibutyl(octanoyloxy)stannyl] octanoate Chemical compound CCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCC NBJODVYWAQLZOC-UHFFFAOYSA-L 0.000 claims description 2
- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 2
- AHUXYBVKTIBBJW-UHFFFAOYSA-N dimethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OC)(OC)C1=CC=CC=C1 AHUXYBVKTIBBJW-UHFFFAOYSA-N 0.000 claims description 2
- HGQSXVKHVMGQRG-UHFFFAOYSA-N dioctyltin Chemical compound CCCCCCCC[Sn]CCCCCCCC HGQSXVKHVMGQRG-UHFFFAOYSA-N 0.000 claims description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 2
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 2
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 2
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 239000005909 Kieselgur Substances 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000012763 reinforcing filler Substances 0.000 abstract description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 229920002545 silicone oil Polymers 0.000 abstract description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 19
- 238000012360 testing method Methods 0.000 description 14
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 238000003756 stirring Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000002390 rotary evaporation Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000003386 deoximation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940008099 dimethicone Drugs 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
-
- 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
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a high-strength low-density room temperature vulcanized rubber as well as a preparation method and application thereof. The high-strength low-density room temperature vulcanized rubber comprises the following components in parts by weight: 100 parts of polydimethylsiloxane; 0-20 parts of dimethyl silicone oil; 10-50 parts of T-type methoxy silicone resin; 0-10 parts of filler; 2-6 parts of cross-linking agent; 0.2-3 parts of coupling agent; 0.1 to 8 parts of catalyst. The invention takes polydimethylsiloxane as a main raw material, T-shaped methoxy silicone resin as a main reinforcing filler, realizes the characteristics of high strength and low density, has excellent bonding and simple process, and the prepared high-strength low-density room temperature vulcanized rubber has the density of 1.07g/cm after being completely cured 3 Below, can be as low as 1.03g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The tensile strength is above 3.0MPa and can reach 4.53MPa; the shearing strength is above 2.0MPa and can reach 2.57MPa.
Description
Technical Field
The invention relates to the technical field of organic polymer materials, in particular to a high-strength low-density room temperature vulcanized rubber, and a preparation method and application thereof.
Background
The single-component room temperature vulcanized silicone rubber has excellent adhesive property and mechanical property, low cost and easy automatic dispensing, and is widely applied to the fields of construction, electronics and electricity, industry and the like due to excellent high and low temperature resistance, electrical insulation property and weather resistance. Depending on the type of curing reaction, dealcoholization systems and deoximation systems can be classified. Wherein, the micromolecules released in the curing process of the dealcoholization system are alcohols, and the dealcoholization system has the characteristics of no toxicity, environmental protection, no corrosion and the like, and is widely applied to various industries.
The high-strength low-density organosilicon adhesive sealant is widely applied in the fields requiring light weight, such as new energy, communication, electronic and electric appliances, electric power, military industry and the like, and is also a main trend of future development. At present, the method for improving the tensile strength mainly comprises the steps of adding a large amount of inorganic reinforcing filler, so that low density is difficult to achieve, and the method for reinforcing the tensile strength by using the organic silicon resin is difficult to achieve high strength, or the situation that the body strength is high but the bonding strength is poor occurs.
Therefore, there is a need to provide a high strength low density room temperature vulcanized rubber with excellent adhesive properties.
Disclosure of Invention
The invention aims to overcome the defects and provide the high-strength low-density room temperature vulcanized rubber with excellent adhesive property. According to the invention, the polydimethylsiloxane is used as a main raw material, and the silicone resin with a specific molecular structure is used as a main reinforcing filler, so that the high strength and low density characteristics of the organic silicone adhesive are realized.
The invention further aims at providing a preparation method of the high-strength low-density room temperature vulcanized rubber.
Another object of the present invention is to provide the use of said high strength low density room temperature vulcanizable adhesive in the fields of construction, electronic communications, industry, new energy or corrosion protection.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the high-strength low-density room temperature vulcanized rubber comprises the following components in parts by weight:
according to the invention, by designing the space structure of the silicone resin, the proper crosslinking degree is achieved, the compatibility of the silicone resin and the system is greatly increased, the aim of preferentially reacting the polydimethylsiloxane-based adhesive with the silicone resin is fulfilled, and the strength and toughness of the system are considered, so that the defect of preferentially reacting the polydimethylsiloxane-based adhesive with the polydimethylsiloxane-based adhesive or the silicone resin with the silicone resin is avoided, and the curing performance and mechanical property of the system are influenced. The density of the silicone resin is close to that of the polydimethylsiloxane, so that the addition of the silicone resin has little influence on the density, and the effect of improving the reinforcement degree is remarkable.
Preferably, the polydimethylsiloxane comprises one or a combination of a plurality of methyl dimethoxy end-capped polydimethylsiloxane, trimethoxy end-capped polydimethylsiloxane and vinyl dimethoxy end-capped polydimethylsiloxane.
Preferably, the dynamic viscosity of the polydimethylsiloxane at 25 ℃ is 1500-80000 mPa.s, and the viscosity is obtained by testing according to the method in GB/T22235-2008. The polydimethylsiloxane is used as matrix resin, the viscosity of the matrix resin is in the range, the strength of the prepared vulcanized rubber can be ensured, and other components such as inorganic matters like fillers and the like can be uniformly and stably dispersed in the system.
In the invention, the dimethyl silicone oil (namely, the polydimethylsiloxane) is used as a viscosity regulator to regulate the viscosity of the system, so that the vulcanized rubber has better processing and curing performances. The dynamic viscosity of the simethicone at 25 ℃ can be selected to be 50-12500 mPa.s.
Preferably, the T-type methoxy silicone resin is prepared from the following substances in parts by weight: dimethyldichlorosilane: methyltrimethoxysilane: phenyl trimethoxysilane: n-hexadecyltrimethoxysilane = 1: (2-6): (0-2): (0-2).
In the invention, the T-type methoxy silicone resin is prepared by the following steps:
(1) adding purified water into the flask, slowly dripping dimethyl dichlorosilane in the state of stirring at 5-40 ℃ and stirring for 1-3 h; (2) adding methyl trimethoxy silane, phenyl trimethoxy silane and n-hexadecyl trimethoxy silane dissolved in toluene into a dropping funnel, slowly dropping into a flask under the condition of stirring at room temperature, and then heating to 50-90 ℃ under the protection of nitrogen, and stirring and reacting for 1-5 h; (3) restoring to room temperature, and regulating pH to neutrality; excess solvent toluene was removed by rotary evaporation to give the T-methoxy silicone resin.
Preferably, the filler comprises one or a combination of several of calcium carbonate, talcum powder, zinc borate, titanium dioxide, silicon micropowder, quartz powder, aluminum hydroxide, aluminum oxide, white carbon black, magnesium oxide, zinc oxide, barium carbonate, diatomite and kaolin. The mechanical strength of the vulcanized rubber can be improved by adding the filler.
Preferably, the cross-linking agent includes, but is not limited to, one or a combination of several of vinyltrimethoxysilane, vinyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetramethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane.
Preferably, the coupling agent includes, but is not limited to, one or more of gamma-aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane, 3-aminopropyl methyldimethoxysilane, 3-aminopropyl methyldiethoxysilane, 3- (methacryloyloxy) propyltrimethoxysilane, gamma- [ (2, 3) -epoxypropyl ] propyltrimethoxysilane.
Preferably, the catalyst includes, but is not limited to, one or a combination of several of dioctyltin diacetate, dioctyltin dilaurate, dioctyltin dioctoate, dibutyl tin diacetate, dibutyl tin dilaurate, dibutyl tin dioctoate, isopropyl titanate, isobutyl titanate, n-butyl titanate, ethyl acetoacetate chelate of isopropyl titanate, acetylacetone chelate of isopropyl titanate.
The invention also provides a preparation method of the high-strength low-density room temperature vulcanized rubber, which comprises the following steps:
and uniformly mixing polydimethylsiloxane, simethicone and filler, dehydrating at 80-150 ℃ under the vacuum condition of-0.097 to-0.092 Mpa, cooling to below 40 ℃, adding T-methoxy silicone resin, a cross-linking agent, a coupling agent and a catalyst, uniformly mixing, and discharging to obtain the high-strength low-density room temperature vulcanized rubber.
Preferably, the dehydration time is 2 to 4 hours.
Preferably, in the step, the mode of mixing the raw materials is vacuum stirring and mixing, and the conditions of the vacuum stirring and mixing are as follows: vacuumizing to-0.097 Mpa to-0.092 Mpa, and hermetically stirring for 30+/-10 min.
The application of the high-strength low-density room temperature vulcanized rubber in the fields of construction, electronic communication, industry, new energy or corrosion prevention is also within the protection scope of the invention.
Compared with the prior art, the invention has the beneficial effects that:
compared with the existing room temperature vulcanized silicone rubber, the invention uses the polydimethylsiloxane as the main raw material, and the T-shaped methoxy silicone resin as the main reinforcing filler, thereby realizing the characteristics of high strength and low density, and simultaneously having excellent bonding and simple process characteristics. After the prepared high-strength low-density room temperature vulcanized rubber is completely cured, the tensile strength is more than or equal to 3.0MPa, and the density is less than or equal to 1.07g/cm 3 And the bonding strength is above 2.0 MPa.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples, which are not intended to limit the present invention in any way. Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art. The reagents and materials used in the present invention are commercially available unless otherwise specified.
The raw material description:
polydimethyl siloxane:
1#: trimethoxy-terminated polydimethylsiloxane having a viscosity of 2000mPa.s at 25℃and available from orange materials (Guangzhou) Co., ltd;
2#: trimethoxy-terminated polydimethylsiloxane, O-FT200, having a viscosity at 25℃of 20000mPa.s, available from New orange materials (Guangzhou) Co., ltd;
3#: trimethoxy-terminated polydimethylsiloxane, O-FT800, having a viscosity of 80000mPa.s at 25℃available from orange day New Material (Guangzhou) Co., ltd;
4#: vinyl dimethoxy-terminated polydimethylsiloxane, O-F1500, having a viscosity of 1550mpa.s at 25 ℃ available from orange materials, guangzhou, inc.;
dimethicone：
1#：AK 50, viscosity at 25 ℃ 50mpa.s, available from wack chemistry (china) limited;
2#：AK 100, viscosity 100mpa.s at 25 ℃, available from wack chemistry (china) limited;
3#：AK 12500, a viscosity of 12500mpa.s at 25 ℃, available from wack chemistry (china) limited;
and (3) filling:
white carbon black: h18, available from Wake chemistry (China);
titanium white powder: SR-237, available from Shandong Sema Co., ltd;
calcium carbonate: CCS-25, purchased from guangxi new material technology limited;
crosslinking agent: vinyl trimethoxy silane, commercially available;
coupling agent: gamma-aminopropyl triethoxysilane, KH-550, commercially available;
catalyst: dioctyltin diacetate, commercially available;
t-type methoxy silicone resin:
the preparation method comprises the following steps:
(1) adding purified water into the flask, dropwise adding dimethyl dichlorosilane while stirring at 40 ℃, and stirring for 3 hours to mix uniformly; (2) adding methyl trimethoxy silane, phenyl trimethoxy silane and n-hexadecyl trimethoxy silane dissolved in toluene into a dropping funnel, slowly dropping the mixture into the flask under the stirring state at room temperature (25 ℃), and then heating to 80 ℃ under the protection of nitrogen, and stirring and reacting for 4 hours; (3) restoring to room temperature (25 ℃), and regulating pH to neutrality; excess solvent toluene was removed by rotary evaporation to give the T-methoxy silicone resin.
TABLE 1 raw material ratio (weight ratio) of Silicone resins
Examples 1 to 8
The embodiment provides a series of high-strength low-density room temperature vulcanized rubber, and the preparation method comprises the following steps:
according to the raw material composition shown in Table 2, after uniformly mixing polydimethylsiloxane, simethicone and filler by a dynamic mixer, dehydrating for 3 hours at 150 ℃ under the vacuum condition of minus 0.092Mpa, then cooling to below 40 ℃, adding T-methoxy silicone resin, a cross-linking agent, a coupling agent and a catalyst, vacuumizing to minus 0.097Mpa, hermetically stirring for 30 minutes, uniformly mixing, and discharging to obtain the high-strength low-density room temperature vulcanized rubber.
Table 2 high strength low density room temperature vulcanizable gums of examples 1-8 (parts by weight)
Comparative example 1
This comparative example provides a room temperature vulcanized rubber, prepared by the method of example 1, which differs from example 1 in that: the quality of T-type methoxy silicone resin is replaced by calcium carbonate.
Comparative example 2
The present comparative example provides a room temperature vulcanized rubber, prepared by referring to the method of comparative example 1, which is different from comparative example 1 in that: the amount of calcium carbonate was increased to 100 parts by weight.
Comparative example 3
This comparative example provides a room temperature vulcanized rubber, prepared by the method of example 1, which differs from example 1 in that: the quality of the T-shaped methoxy silicone resin A is replaced by silicone resin E.
Comparative example 4
This comparative example provides a room temperature vulcanized rubber, prepared by the method of example 1, which differs from example 1 in that: the quality of T-methoxy silicone resin A is replaced by silicone resin F.
Comparative example 5
This comparative example provides a room temperature vulcanized rubber, prepared by the method of example 1, which differs from example 1 in that: the mass of the T-shaped methoxy silicone resin A is replaced by silicone resin G.
Comparative example 6
This comparative example provides a room temperature vulcanized rubber, prepared by the method of example 1, which differs from example 1 in that: the quality of the T-shaped methoxy silicone resin A is replaced by silicone resin H.
Performance testing
After the room temperature vulcanized rubber obtained in the above examples and comparative examples is cured, the performance of the cured vulcanized rubber is characterized, wherein the cured method of the vulcanized rubber is as follows: uniformly filling the prepared high-strength low-density room temperature vulcanized organic silica gel into a polytetrafluoroethylene container, then placing a sample plate into the container for curing for 7 days under the conditions of the temperature of 23+/-2 ℃ and the relative humidity of 55%, taking out the container to obtain a test sample plate, and cutting the test sample plate for performance test.
The specific test items and test methods are as follows:
1. surface drying time: according to GB/T13477.5 test;
2. density: according to the standard GB/T13477.2-2018 test, the test is carried out according to a density balance method;
3. tensile strength and elongation at break: according to the GB/T528-2009 test, wherein a dumbbell-shaped sample (type I, thickness of 2 mm) was prepared from the sample, the stretching rate was 500mm/min, and the test temperature was 25 ℃;
4. hardness: according to GB/T531.1-2008 test;
5. shear strength (adhesive properties): according to the GB/T7124-2008 test, in particular: the prepared high-strength low-density room temperature vulcanized organic silica gel is uniformly coated on the surface of 3003 aluminum materials, the bonding area is 25mm x 12.5mm, the thickness is 1mm, and then the prepared sample plate is placed at the temperature of 23+/-2 ℃ and the relative humidity of 55% for curing for 7 days, taken out and tested.
The test results are shown in Table 3.
TABLE 3 test results of vulcanizates obtained in examples and comparative examples
From the above results, it can be seen that:
the vulcanized rubber prepared by the invention has low density, high strength and excellent adhesive property, wherein the density is 1.07g/cm 3 In the following the procedure is described,can be as low as 1.03g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The tensile strength is above 3.0MPa and can reach 4.53MPa; the shearing strength is above 2.0MPa and can reach 2.57MPa.
Comparative example 1The T-shaped methoxy silicone resin is replaced by calcium carbonate, so that the density is high, and the tensile strength is low due to insufficient addition; whileComparative example 2After the calcium carbonate in the comparative example 1 is added to 100 parts by weight, a large amount of inorganic filler is added, and the strength is improved, but the density is obviously higher than that of the vulcanized rubber prepared by the embodiment of the invention; example 1,Comparative examples 3 to 6The results of (2) further show that the strength and the bonding strength of the vulcanized rubber can be improved on the basis of keeping the lower density only by selecting the silicone resin with the specific structure.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. The high-strength low-density room temperature vulcanized rubber is characterized by comprising the following components in parts by weight:
2. the high strength, low density room temperature vulcanizing adhesive of claim 1, wherein the polydimethylsiloxane comprises one or a combination of methyl dimethoxy-terminated polydimethylsiloxane, trimethoxy-terminated polydimethylsiloxane, vinyl dimethoxy-terminated polydimethylsiloxane.
3. The high strength low density room temperature vulcanizing adhesive of claim 1, wherein the dynamic viscosity of the simethicone is 50 to 12500mpa.s at 25 ℃.
4. The high-strength low-density room temperature vulcanized rubber according to claim 1, wherein the T-shaped methoxy silicone resin is prepared from the following substances in parts by weight:
dimethyldichlorosilane: methyltrimethoxysilane: phenyl trimethoxysilane: n-hexadecyltrimethoxysilane = 1: (2-6): (0-2): (0-2).
5. The high strength low density room temperature vulcanized rubber according to claim 1, wherein the filler comprises one or a combination of several of calcium carbonate, talc, zinc borate, titanium white, silica powder, quartz powder, aluminum hydroxide, aluminum oxide, white carbon black, magnesium oxide, zinc oxide, barium carbonate, diatomaceous earth, and kaolin.
6. The high strength low density room temperature vulcanizing adhesive of claim 1, wherein the cross-linking agent comprises one or a combination of several of vinyltrimethoxysilane, vinyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetramethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane.
7. The high strength, low density room temperature vulcanizing adhesive of claim 1, wherein the coupling agent comprises one or a combination of gamma-aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane, 3-aminopropyl methyldimethoxysilane, 3-aminopropyl methyldiethoxysilane, 3- (methacryloyloxy) propyltrimethoxysilane, gamma- [ (2, 3) -epoxypropyl ] propyltrimethoxysilane.
8. The high strength low density room temperature vulcanizing adhesive of claim 1, wherein the catalyst comprises one or a combination of several of dioctyltin diacetate, dioctyltin dilaurate, dioctyltin dioctoate, dibutyl tin diacetate, dibutyl tin dilaurate, dibutyl tin dioctoate, isopropyl titanate, isobutyl titanate, n-butyl titanate, ethyl acetoacetate chelate of isopropyl titanate, acetylacetone chelate of isopropyl titanate.
9. The method for preparing the high-strength low-density room temperature vulcanized rubber according to any one of claims 1 to 8, comprising the following steps:
and uniformly mixing polydimethylsiloxane, simethicone and filler, dehydrating at 80-150 ℃ under the vacuum condition of-0.097 to-0.092 Mpa, cooling to below 40 ℃, adding T-methoxy silicone resin, a cross-linking agent, a coupling agent and a catalyst, uniformly mixing, and discharging to obtain the high-strength low-density room temperature vulcanized rubber.
10. Use of the high strength low density room temperature vulcanizable rubber of any one of claims 1 to 8 in the fields of construction, electronic communications, industry, new energy or corrosion protection.
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