CN102796381B - Condensation type RTV silicone rubber composition with matte surface, its preparation method and application - Google Patents
Condensation type RTV silicone rubber composition with matte surface, its preparation method and application Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 88
- 238000009833 condensation Methods 0.000 title claims abstract description 6
- 230000005494 condensation Effects 0.000 title claims abstract description 6
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000004945 silicone rubber Substances 0.000 title abstract description 16
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 title abstract 2
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 52
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 229920002545 silicone oil Polymers 0.000 claims abstract description 15
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract 2
- 229920001971 elastomer Polymers 0.000 claims description 51
- XQSFXFQDJCDXDT-UHFFFAOYSA-N hydroxysilicon Chemical compound [Si]O XQSFXFQDJCDXDT-UHFFFAOYSA-N 0.000 claims description 25
- 239000003921 oil Substances 0.000 claims description 25
- 239000004902 Softening Agent Substances 0.000 claims description 19
- -1 γ-(methacryloxypropyl) propyl Chemical group 0.000 claims description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- 239000006229 carbon black Substances 0.000 claims description 13
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- 238000004132 cross linking Methods 0.000 claims description 7
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 claims description 7
- 229920000260 silastic Polymers 0.000 claims description 7
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 claims description 6
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 claims description 6
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000011863 silicon-based powder Substances 0.000 claims description 6
- XXZNHVPIQYYRCG-UHFFFAOYSA-N trihydroxy(propoxy)silane Chemical compound CCCO[Si](O)(O)O XXZNHVPIQYYRCG-UHFFFAOYSA-N 0.000 claims description 6
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- ZEMPKEQAKRGZGQ-AAKVHIHISA-N 2,3-bis[[(z)-12-hydroxyoctadec-9-enoyl]oxy]propyl (z)-12-hydroxyoctadec-9-enoate Chemical compound CCCCCCC(O)C\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CC(O)CCCCCC)COC(=O)CCCCCCC\C=C/CC(O)CCCCCC ZEMPKEQAKRGZGQ-AAKVHIHISA-N 0.000 claims description 4
- 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 4
- 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 claims description 4
- 239000002383 tung oil Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 2
- 239000013522 chelant Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 3
- 238000004382 potting Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 239000004014 plasticizer Substances 0.000 abstract 2
- 239000003431 cross linking reagent Substances 0.000 abstract 1
- 239000001023 inorganic pigment Substances 0.000 abstract 1
- 235000019241 carbon black Nutrition 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000001795 light effect Effects 0.000 description 4
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 4
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 4
- 238000005987 sulfurization reaction Methods 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- KHDSWONFYIAAPE-UHFFFAOYSA-N silicon sulfide Chemical compound S=[Si]=S KHDSWONFYIAAPE-UHFFFAOYSA-N 0.000 description 1
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 description 1
- 125000005401 siloxanyl group Chemical group 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a condensation type RTV silicone rubber composition with a matte surface. The composition is composed of three components: A, B and C. Specifically, component A comprises, by weight part: 80-120 of 107 silicone rubber, 20-110 of a filling material, 5-80 of a plasticizer, 1-10 of hydroxy silicone oil, and 1-10 of an inorganic pigment; component B comprises, by weight part: 2-15 of a crosslinking agent, 1-8 of a silane coupling agent, 5-35 of the plasticizer, and 0.05-0.6 of a catalyst; and component C comprises, by weight part: 0.5-5 of a matt agent. The silicone rubber provided in the invention has good storage stability and excellent matte effect, can be widely applied in maskless LED display screen module potting, and effectively reduces the production cost. After using the silicone rubber, the glossiness can be reduced to less than 0.5Gs (60DEG C), and the matte effect is very excellent.
Description
Technical field
The present invention relates to a kind of pair of component condensed type rubber composition, particularly, the present invention relates to a kind of condensed type rubber composition of matte surface.
Background technology
Room temperature vulcanized silicone rubber is a kind of novel silicone elastomer coming out in the sixties, and the distinguishing feature of this rubber is at room temperature need not heat, pressurize and can solidify on the spot, and it is extremely convenient to use.Therefore, become rapidly an important component part of whole organosilicon product once coming out, room temperature vulcanized silicone rubber has been widely used as tackiness agent, sealing agent, protective coating, embedding and pattern-making material now, has its purposes in all trades and professions.Room temperature vulcanized silicone rubber is because molecular weight is lower, therefore have the title of liquid silastic, its physical aspect is generally the paste of flowable fluid or thickness, its viscosity is between 100 ~ 1000000cps, according to the requirement of using, the sizing material before sulfuration can be made into the perfusion material of automatic levelling or not trickle but can be coated with the putty of scraping.Filler and high-temperature silicon disulfide rubber that room temperature vulcanized silicone rubber is used are similar, adopt black-reinforced, and dose different additives and can make sizing material there is different proportion, hardness, intensity, mobility and thixotropy, and make cross-linked rubber there are the various properties such as fire-retardant, conduction, heat conduction, resistance to ablation; Room temperature vulcanized silicone rubber can be divided into single component and two-component room-temperature-vulcanized silicone rubber by its packaging means, by sulfuration mechanism, can be divided into condensed type and add-on type again.Therefore, room temperature vulcanized silicone rubber is by composition, sulfuration mechanism be divided into three major types types different from operation, i.e. single-component room-temperature vulcanized silicone rubber, bicomponent condensed type room temperature sulfidization silicon rubber and two-component addition type room temperature vulcanized silicone rubber.
The embedding that condensed room temperature vulcanized silicone rubber is applied to various electronic component modules is very general, and it has very excellent cementability and integrally curing performance, thereby is applicable to the embedding of large-area module, the particularly embedding of LED display module.General bicomponent condensed type room temperature sulfidization silicon rubber, after solidifying, the bright glue-line of formation layer of surface, has strong reflex action, thereby when LED lamp luminescence, because reflection can cause the situations such as fuzzy pictures.The most general a kind of way be with a kind of plastics of matte surface as face shield, glue-line is all hidden, can avoid reflex to occur, but cost is higher.
CN 101565601A discloses a kind of condensed type organic silicon potting material composition of the embedding matte surface for LED display module, it comprises: liquid silastic, linking agent, catalyzer, stopping composition, siccative and dumb light agent, wherein, under the aerial moisture effect of higher unsaturated fatty acid that contains a plurality of unsaturated link(age)s by this dumb light agent, can be hydrolyzed, generate higher unsaturated fatty acid, then, there is crosslinking reaction in oxidation rapidly, on glue-line surface, forms a dumb light film; Fundamentally avoid the existence of reflection, thereby reach, can not use face shield, cost-saving effect.But its dumb light time is longer, and glossiness is still higher.
Summary of the invention
One of object of the present invention is to provide a kind of condensed type rubber composition of matte surface, described silastic surface forms one deck dumb light film, fundamentally avoid the existence of reflection, thereby reach, can not use face shield, cost-saving effect, and the dumb light time of described rubber composition is shorter, and glossiness is lower, and dumb light effect is very excellent.
In order to achieve the above object, the present invention has adopted following technical scheme:
The condensed type rubber composition of described matte surface is comprised of A, B and tri-kinds of components of C;
Wherein, A component comprises by weight: 107 silicon rubber 80 ~ 120, filler 20 ~ 110, softening agent 5 ~ 80, hydroxy silicon oil 1 ~ 10, mineral dye 1 ~ 10;
B component comprises by weight: linking agent 2 ~ 15, silane coupling agent 1 ~ 8, softening agent 5 ~ 35, catalyzer 0.05 ~ 0.6;
C component comprises by weight: dumb light agent 0.5 ~ 5.
Preferably, A component comprises by weight: 107 silicon rubber 90 ~ 110, filler 25 ~ 105, softening agent 5 ~ 80, hydroxy silicon oil 1 ~ 10, mineral dye 1 ~ 10.
Preferably, A component comprises by weight: 107 silicon rubber 100, filler 30 ~ 100, softening agent 5 ~ 80, hydroxy silicon oil 1 ~ 10, mineral dye 1 ~ 10.
In A component:
The parts by weight of described 107 silicon rubber are 80 ~ 120, for example 83,86,89,92,94,98,100,103,108,111,114,117,119, preferably 90 ~ 110, further preferably 100.
The parts by weight of described filler are 20 ~ 110, for example 30,40,50,60,70,80,90,100,105, preferably 25 ~ 105, further preferably 30 ~ 100.
The parts by weight of described softening agent are 5 ~ 80, for example 10,20,30,40,50,60,70,75.
The parts by weight of described hydroxy silicon oil are 1 ~ 10, for example 2,3,4,5,6,7,8,9.
The parts by weight of described mineral dye are 1 ~ 10, for example 2,3,4,5,6,7,8,9.
Preferably, B component comprises by weight: linking agent 3 ~ 12, silane coupling agent 2 ~ 7, softening agent 8 ~ 30, catalyzer 0.1 ~ 0.5.
Preferably, B component comprises by weight: linking agent 5 ~ 10, silane coupling agent 3 ~ 6, softening agent 10 ~ 30, catalyzer 0.2 ~ 0.5.
In B component:
The parts by weight of described linking agent are 2 ~ 15, for example 3,4,5,6,7,8,9,10,11,12,13,14, preferably 3 ~ 12, further preferably 5 ~ 10.
The parts by weight of described silane coupling agent are 1 ~ 8, for example 2,3,4,5,6,7, preferably 2 ~ 7, further preferably 3 ~ 6.
The parts by weight of described softening agent are 5 ~ 35, for example 8,11,14,18,21,23,25,27,29,32,34, preferably 8 ~ 30, further preferably 10 ~ 30.
The parts by weight of described catalyzer are 0.05 ~ 0.6, for example 0.1,0.15,0.2,025,0.3,0.35,0.4,0.45,0.5,0.55, preferably 0.1 ~ 0.5, further preferably 0.2 ~ 0.5.
Preferably, described C component comprises dumb light agent 1 ~ 5 by weight, for example 1.5,2.0,2.5,3.0,3.5,4.0,4.5,4.8,4.9, preferably 2 ~ 4.
Hydroxyl-terminated injecting two methyl siloxane, structural formula is as described below:
Hydroxyl-terminated injecting two methyl siloxane by siloxanyl monomers be polymerized, its molecule two ends are with the organosilicon material of hydroxyl, it is except having the general property of siloxanes, the reactive behavior also with hydroxyl, available it make some new materials, or be cross-linked into elastomerics.
107 silicon rubber and hydroxy silicon oil formal name used at school are hydroxyl-terminated injecting two methyl siloxane, generally, low viscous hydroxyl-terminated injecting two methyl siloxane claims hydroxy silicon oil, full-bodied hydroxyl-terminated injecting two methyl siloxane is called 107 silicon rubber, and the hydroxy radical content of hydroxy silicon oil and fugitive constituent are high more a lot of than 107 silicon rubber.The difference of hydroxy silicon oil and 107 silicon rubber is only that both viscosity is different.Those skilled in the art have the ability hydroxy silicon oil and 107 silicon rubber to make a distinction according to the disclosed knowledge of prior art, and described 107 silicon rubber and hydroxy silicon oil are all available commercially.
As LED display joint sealant, requirement has good mobility, preferably, the kinetic viscosity of 107 silicon rubber of the present invention is 1500-50000cps, for example 1800cps, 2500cps, 5000cps, 10000cps, 20000cps, 30000cps, 40000cps, 45000cps, preferred 1800 ~ 45000cps, further preferred 2000 ~ 40000cps.Those skilled in the art also can be according to the own knowledge that grasp, 107 silicon rubber are carried out composite, such as regulating the viscosity of 107 silicon rubber by adding tensio-active agent etc., so that it meets above-mentioned range of viscosities.Described 107 silicon rubber can be pure silicon rubber, can be also the silicon rubber carrying out after composite, and only need to meet kinetic viscosity is 1500 ~ 50000cps.
Preferably, the kinetic viscosity of described hydroxy silicon oil is 5 ~ 250cps, for example 10cps, 50cps, 80cps, 110cps, 150cps, 180cps, 210cps, 230cps, 240cps, preferred 10 ~ 220cps, further preferred 10 ~ 200cps.Those skilled in the art also can be according to the own knowledge that grasp, hydroxy silicon oil is carried out composite, such as regulating the viscosity of hydroxy silicon oil by adding tensio-active agent etc., so that it meets above-mentioned range of viscosities.Described hydroxy silicon oil can be pure hydroxy silicon oil, can be also the hydroxy silicon oil carrying out after composite, and only need to meet kinetic viscosity is 5 ~ 250cps.
Softening agent preferable methyl silicone oil of the present invention, the methyl-silicone oil that further preferably kinetic viscosity is 50 ~ 500cps, for example 100cps, 150cps, 200cps, 250cps, 300cps, 350cps, 400cps, 450cps, 480cps, 490cps, more preferably the methyl-silicone oil that kinetic viscosity is 80 ~ 450cps, the methyl-silicone oil that further preferably kinetic viscosity is 100 ~ 400cps.
Preferably, described filler is selected from the mixture of a kind of in light calcium carbonate, water-ground limestone, talcum powder, aluminium hydroxide, white carbon black or silicon powder or at least two kinds.Described mixture is the mixture of silicon powder and white carbon black for example, aluminium hydroxide and talcous mixture, the mixture of water-ground limestone and light calcium carbonate, the mixture of silicon powder, white carbon black and aluminium hydroxide, the mixture of talcum powder, water-ground limestone and light calcium carbonate, silicon powder, white carbon black, aluminium hydroxide and talcous mixture, water-ground limestone, light calcium carbonate, silicon powder, white carbon black and talcous mixture.
Preferably, described mineral dye is carbon black or iron oxide black.
Preferably, described linking agent is selected from the mixture of a kind of in tetraethoxy, ethyl polysilicate, positive silicic acid propyl ester, Union carbide A-162, methyltrimethoxy silane, dimethyldiethoxysilane, vinyltriethoxysilane or poly-Union carbide A-162 or at least two kinds.Described mixture for example gathers the mixture of Union carbide A-162 and vinyltriethoxysilane, the mixture of dimethyldiethoxysilane and methyltrimethoxy silane, the mixture of Union carbide A-162 and positive silicic acid propyl ester, the mixture of tetraethoxy and poly-Union carbide A-162, vinyltriethoxysilane, the mixture of dimethyldiethoxysilane and methyltrimethoxy silane, Union carbide A-162, the mixture of positive silicic acid propyl ester and tetraethoxy, poly-Union carbide A-162, vinyltriethoxysilane, the mixture of dimethyldiethoxysilane and methyltrimethoxy silane, Union carbide A-162, positive silicic acid propyl ester, tetraethoxy, the mixture of poly-Union carbide A-162 and vinyltriethoxysilane.By reducing the number of siloxane groups, can reduce cross-linking density, extend operable time, reduce the hardness of silicon rubber, improve snappiness, meanwhile, increase the carbon atom number in alkoxyl group, also can extend operable time, improve snappiness.
Preferably, described silane coupling agent is selected from the mixture of a kind of in γ-aminopropyl triethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, N-β-aminoethyl-γ-aminopropyltrimethoxysilane or isocyanic acid propyl-triethoxysilicane or at least two kinds.Described mixture is the mixture of γ-(methacryloxypropyl) propyl trimethoxy silicane and isocyanic acid propyl-triethoxysilicane for example, the mixture of N-β-aminoethyl-γ-aminopropyltrimethoxysilane and γ-(methacryloxypropyl) propyl trimethoxy silicane, the mixture of γ-aminopropyl triethoxysilane and γ-(methacryloxypropyl) propyl trimethoxy silicane, isocyanic acid propyl-triethoxysilicane, the mixture of N-β-aminoethyl-γ-aminopropyltrimethoxysilane and γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-aminopropyl triethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, the mixture of isocyanic acid propyl-triethoxysilicane and N-β-aminoethyl-γ-aminopropyltrimethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-aminopropyl triethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, the mixture of isocyanic acid propyl-triethoxysilicane and N-β-aminoethyl-γ-aminopropyltrimethoxysilane.Silane coupling agent add the adhesive property of having given described rubber composition excellence.
The preferred organic tin inner complex of described catalyzer, further preferably from dibutyl tin laurate or/and two dioctyltin laurate.
Preferably, the preferred unsaturated high-grade fatty acid ester of described dumb light agent, the further preferably mixture of a kind of in oleum lini, tung oil or Viscotrol C or at least two kinds.Under the aerial moisture effect of unsaturated high-grade fatty acid ester, can be hydrolyzed, generate unsaturated high-grade fatty acid,, there is crosslinking reaction in oxidation rapidly then, on glue-line surface, forms a dumb light film.
" comprising " of the present invention, mean it except described component, can also comprise other components, these other components give described silicon rubber different characteristics.In addition, " comprising " of the present invention, can also replace with enclosed " being " or " by ... form ".
Weight part described in the present invention adopts same benchmark to calculate, and unit is identical.
Two of object of the present invention is to provide a kind of preparation method of rubber composition as above, and described method is:
By A, B and tri-kinds of component packing of C, mixed at room temperature forms soft silicone elastomer through condensation cross-linking, wherein, dumb light agent issues unboiled water solution in the moisture effect of air, generate higher unsaturated fatty acid, then oxidation, forms one deck dumb light film at silastic surface, thereby obtains the condensed type rubber composition of matte surface.
Three of object of the present invention is to provide a kind of purposes of rubber composition as above, and described rubber composition can be used for the embedding of LED display module.
Compared with prior art, the present invention has following beneficial effect:
Two-component silicone rubber stability in storage of the present invention is good, and dumb light effect is good, is widely used in the LED display module embedding without face shield, effectively reduces production cost.Do not adopt such dulling material, glossiness is about 70 ~ 90Gs(60 °), but after adopting such material, glossiness drops to 0.5Gs(60 °) below, there is very excellent dumb light effect.The silicon rubber dumb light time of the present invention is short, and dumb light effect is excellent, has very high using value.
Embodiment
For the present invention is described better, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
Embodiment 1
A condensed type rubber composition for matte surface, is characterized in that, described rubber composition is comprised of A, B and tri-kinds of components of C;
A component comprises by weight: 107 silicon rubber (viscosity is 50000cps) 80, water-ground limestone 110, methyl-silicone oil (viscosity is 50cps) 40, hydroxy silicon oil (viscosity is 150cps) 5, carbon black 1;
B component comprises by weight: tetraethoxy 2, γ-aminopropyl triethoxysilane 1, methyl-silicone oil (viscosity is 50cps) 20, dibutyl tin laurate 0.05;
C component comprises by weight: oleum lini 0.5.
Embodiment 2
A condensed type rubber composition for matte surface, is characterized in that, described rubber composition is comprised of A, B and tri-kinds of components of C;
A component comprises by weight: 107 silicon rubber 120(viscosity are 1500cps), light calcium carbonate 20, methyl-silicone oil (viscosity is 500cps) 80, hydroxy silicon oil (viscosity is 5cps) 10, carbon black 5;
B component comprises by weight: positive silicic acid propyl ester 15, γ-(methacryloxypropyl) propyl trimethoxy silicane 8, methyl-silicone oil (viscosity is 500cps) 35, two dioctyltin laurate 0.6;
C component comprises by weight: tung oil 5.
Embodiment 3
A condensed type rubber composition for matte surface, is characterized in that, described rubber composition is comprised of A, B and tri-kinds of components of C;
A component comprises by weight: 107 silicon rubber 100(viscosity are 25000cps), talcum powder 60, methyl-silicone oil (viscosity is 250cps) 5, hydroxy silicon oil (viscosity is 250cps) 1, carbon black 10;
B component comprises by weight: methyltrimethoxy silane 10, N-β-aminoethyl-γ-aminopropyltrimethoxysilane 5, methyl-silicone oil (viscosity is 250cps) 5, dibutyl tin laurate and two dioctyltin laurate 0.3;
C component comprises by weight: Viscotrol C 2.5.
The preparation method of the rubber composition described in embodiment 1-3 is:
By A, B and tri-component packing of C, mixed at room temperature forms soft silicone elastomer through condensation cross-linking, wherein, the aerial moisture effect of dumb light agent issues unboiled water solution, generate higher unsaturated fatty acid, then oxidation, forms one deck dumb light film at silastic surface, thereby obtains the condensed type rubber composition of matte surface.
Comparative example 1
Comparative example 1 is disclosed one of them embodiment of CN 101565601A.
Described rubber composition is comprised of A, B and tri-components of C:
A component: 107 glue of 100 parts of 5000cs, the dimethyl silicone oil of 10 parts of 100cs, 50 parts of particle diameters are less than stearic acid processing calcium carbonate, Raven M carbon black (U.S. Columbia Co., Ltd), 2 parts of Sipernat 200 precipitator method White Carbon blacks (Degussa) of 2 μ;
B component: 10 parts of tetraethoxysilanes, 2 parts of γ-aminopropyl triethoxysilanes, 0.1 part of dibutyl tin dilaurate;
C component: 10 parts of tung oil, 5 parts of Viscotrol C, 10 parts of acrylate modified Synolac.
The preparation method of described silicon rubber is: A, B and C tri-components, under room temperature, mix by condensation cross-linking, form soft silicone elastomer, dumb light agent composition is wherein again through hydrolysis oxidation, at silastic surface, form one deck dumb light film, thereby obtain a kind of condensed type organic silicon potting material of matte surface.
Silicon rubber described in embodiment 1-3 and comparative example 1 is carried out to the test of hardness, matte surface time and glossiness, and concrete outcome is as shown in table 1.
Table 1 embodiment 1-3 and comparative example 1 test result
Compare with comparative example 1, the dumb light time of silicon rubber of the present invention is short, and glossiness is lower, dumb light better effects if.
Should be noted that and understand, in the situation that not departing from the desired the spirit and scope of the present invention of accompanying claim, can make various modifications and improvement to the present invention of foregoing detailed description.Therefore, the scope of claimed technical scheme is not subject to the restriction of given any specific exemplary teachings.
Applicant's statement, the present invention illustrates detailed method of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed method, does not mean that the present invention must rely on above-mentioned detailed method and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to the selection of the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, concrete mode etc., within all dropping on protection scope of the present invention and open scope.
Claims (25)
1. a condensed type rubber composition for matte surface, is characterized in that, described rubber composition is comprised of A, B and tri-kinds of components of C;
Wherein: A component comprises by weight: 107 silicon rubber 80～120, filler 60～110, softening agent 20～80, hydroxy silicon oil 1～10, mineral dye 1～10;
B component comprises by weight: linking agent 2～15, silane coupling agent 1～8, softening agent 5～35, catalyzer 0.05～0.6;
C component comprises by weight: dumb light agent 0.5～5;
The kinetic viscosity of described hydroxy silicon oil is 5～250cps, and the kinetic viscosity of described 107 silicon rubber is 30000-50000cps.
2. rubber composition as claimed in claim 1, is characterized in that, A component comprises by weight: 107 silicon rubber 90～110, filler 60～105, softening agent 20～80, hydroxy silicon oil 1～10, mineral dye 1～10.
3. rubber composition as claimed in claim 1 or 2, is characterized in that, A component comprises by weight: 107 silicon rubber 100, filler 60～100, softening agent 20～80, hydroxy silicon oil 1～10, mineral dye 1～10.
4. rubber composition as claimed in claim 1 or 2, is characterized in that, B component comprises by weight: linking agent 3～12, silane coupling agent 2～7, softening agent 8～30, catalyzer 0.1～0.5.
5. rubber composition as claimed in claim 4, is characterized in that, B component comprises by weight: linking agent 5～10, silane coupling agent 3～6, softening agent 10～30, catalyzer 0.2～0.5.
6. rubber composition as claimed in claim 1 or 2, is characterized in that, described C component comprises dumb light agent 1～5 by weight.
7. rubber composition as claimed in claim 6, is characterized in that, described C component comprises dumb light agent 2～4 by weight.
8. rubber composition as claimed in claim 1, is characterized in that, the kinetic viscosity of described 107 silicon rubber is 30000～45000cps.
9. rubber composition as claimed in claim 8, is characterized in that, the kinetic viscosity of described 107 silicon rubber is 30000～40000cps.
10. rubber composition as claimed in claim 1 or 2, is characterized in that, described softening agent is methyl-silicone oil.
11. rubber compositions as claimed in claim 10, is characterized in that, described softening agent is that kinetic viscosity is the methyl-silicone oil of 50～500cps.
12. rubber compositions as claimed in claim 11, is characterized in that, described softening agent is that kinetic viscosity is the methyl-silicone oil of 80～450cps.
13. rubber compositions as claimed in claim 12, is characterized in that, described softening agent is that kinetic viscosity is the methyl-silicone oil of 100～400cps.
14. rubber compositions as claimed in claim 1, is characterized in that, the kinetic viscosity of described hydroxy silicon oil is 10～220cps.
15. rubber compositions as claimed in claim 14, is characterized in that, the kinetic viscosity of described hydroxy silicon oil is 10～200cps.
16. rubber compositions as claimed in claim 1 or 2, is characterized in that, described filler is selected from the mixture of a kind of in light calcium carbonate, water-ground limestone, talcum powder, aluminium hydroxide, white carbon black or silicon powder or at least two kinds.
17. rubber compositions as claimed in claim 1 or 2, is characterized in that, described mineral dye is carbon black or iron oxide black.
18. rubber compositions as claimed in claim 1 or 2, it is characterized in that, described linking agent is selected from the mixture of a kind of in tetraethoxy, ethyl polysilicate, positive silicic acid propyl ester, Union carbide A-162, methyltrimethoxy silane, dimethyldiethoxysilane, vinyltriethoxysilane or poly-Union carbide A-162 or at least two kinds.
19. rubber compositions as claimed in claim 1 or 2, it is characterized in that, described silane coupling agent is selected from the mixture of a kind of in γ-aminopropyl triethoxysilane, γ-(methacryloxypropyl) propyl trimethoxy silicane, N-β-aminoethyl-γ-aminopropyltrimethoxysilane or isocyanic acid propyl-triethoxysilicane or at least two kinds.
20. rubber compositions as claimed in claim 1 or 2, is characterized in that, described catalyzer is organotin chelate catalyst.
21. rubber compositions as claimed in claim 20, is characterized in that, described catalyzer is selected from dibutyl tin laurate or/and two dioctyltin laurate.
22. rubber compositions as claimed in claim 1 or 2, is characterized in that, described dumb light agent is unsaturated high-grade fatty acid ester.
23. rubber compositions as claimed in claim 22, is characterized in that, described dumb light agent is the mixture of a kind of in oleum lini, tung oil or Viscotrol C or at least two kinds.
The preparation method of 24. 1 kinds of rubber compositions as described in one of claim 1-23, is characterized in that, described method is:
By A, B and tri-kinds of component packing of C, mixed at room temperature forms soft silicone elastomer through condensation cross-linking, wherein, dumb light agent issues unboiled water solution in the moisture effect of air, generate unsaturated high-grade fatty acid, then oxidation, forms one deck dumb light film at silastic surface, thereby obtains the condensed type rubber composition of matte surface.
The purposes of 25. 1 kinds of rubber compositions as described in one of claim 1-23, is characterized in that, described rubber composition is for the embedding of LED display module.
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| CN105820753B (en) * | 2015-01-08 | 2018-06-29 | 成都拓利科技股份有限公司 | A kind of matt weatherability EMAS special-purpose organic silicon coating and preparation method thereof |
| CN105018019A (en) * | 2015-06-24 | 2015-11-04 | 南昌大学 | Seal repair silicone rubber and its preparation method and use method |
| CN105693956A (en) * | 2016-03-14 | 2016-06-22 | 苏州莱特复合材料有限公司 | Preparation method of fatigue-resistant fender composite material for fenders |
| CN106634802A (en) * | 2016-11-10 | 2017-05-10 | 烟台德邦科技有限公司 | Preparation method of matte silica gel |
| CN106674525A (en) * | 2017-01-18 | 2017-05-17 | 东莞市港田高分子材料有限公司 | Production method of matte silk-printing silica gel |
| CN111378414A (en) * | 2018-12-27 | 2020-07-07 | 上海三思电子工程有限公司 | Matte encapsulating material |
| CN110028792A (en) * | 2019-04-30 | 2019-07-19 | 佛山市天宝利硅工程科技有限公司 | A kind of dumb light type single-component room-temperature vulcanized silicone rubber and preparation method thereof |
| CN115141600B (en) * | 2022-08-19 | 2023-08-29 | 新疆西部合盛硅业有限公司 | Neutral oil-resistant silicone sealant and preparation method thereof |
| CN115746565B (en) * | 2022-10-13 | 2023-08-29 | 隆基绿能科技股份有限公司 | Room temperature vulcanized silicone rubber and preparation method and application thereof |
| CN115850976B (en) * | 2022-11-17 | 2023-11-07 | 汕头大学 | Organosilicon mineral mud refractory material and preparation method and application thereof |
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| CN101565601A (en) * | 2008-05-14 | 2009-10-28 | 广州市回天精细化工有限公司 | Condensed type organic silicon potting material composition with matte surface |
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