CN103421328A - Addition type room temperature vulcanized silicone rubber composite material and preparation method thereof - Google Patents
Addition type room temperature vulcanized silicone rubber composite material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to silicon rubber materials, in particular to an addition type room temperature vulcanized (RTV) silicone rubber composite material and a preparation method thereof. The silicone rubber composite material comprises a base component and a catalyst component which are mixed according to the mass of 1:1. The addition type room temperature vulcanized (RTV) silicone rubber composite material adopting bi-component putty is simple to operate, short in vulcanization time, good in hydrophilicity and elastic recovery, high in tearing strength and shore hardness, and the like. In addition, the addition type room temperature vulcanized (RTV) silicone rubber composite material is widely applicable to multiple fields such as industrial molding, cultural relic reproduction, electronic glue filling, electronic shock and water prevention, and mouth cavity impression.
Description
Technical field
The present invention relates to a kind of silicon rubber mixing material, relate in particular to a kind of addition type room temperature vulcanized (RTV) silicon rubber mixing material and preparation method thereof.
Background technology
In numerous synthetic rubber, silicon rubber is outstanding person therein.It has tasteless nontoxic, is not afraid of high temperature and resists the characteristics of severe cold, and " keeping cool ", " remaining calm " when 300 degrees centigrade and subzero 90 degrees centigrade, still do not lose original intensity and elasticity.Room temperature vulcanized silicone rubber does not have by product to emit in sulfidation, and set time is short, and linear shrinkage ratio is low, nontoxic, tasteless, and the physiology inertia is stablized sterilant etc.Silicon rubber also has good electrical insulating property, oxytolerant resistance to deterioration, fast light resistance to deterioration and mildew resistance, chemical stability etc.Because silastic product has excellent over-all properties, therefore obtain a wide range of applications in the industry such as aviation, aerospace, electric, electronics, chemical industry, instrument, automobile, machinery and health care, daily life every field.
Room temperature vulcanized silicone rubber (being called for short RTV) refers to that not needing heating is at room temperature a vulcanizable class silicon rubber.Room temperature vulcanized silicone rubber is the silicon rubber that a kind of end group contains hydroxyl (or acetoxyl group), and molecular weight is lower, is generally thick fluid.After adding appropriate reinforcing filler, vulcanizing agent and catalyzer (or being subject to airborne water function) in this class rubber, can at room temperature vulcanize and elastomer-forming.All fine at aspects such as thermotolerance, winter hardiness, dielectric properties after sulfuration fully, only its physical strength is low, can be used for casting and coating sizing material.Room temperature vulcanized silicone rubber can be divided into two kinds of one-pack type and two-component-types.
The sulfuration mechanism of two-component addition type room temperature vulcanized silicone rubber is based on vinyl (or propenyl) on organosilicon rubber end group and the silicon hydrogen base (Si-H) on cross-linker molecules and occurs that addition reaction (hydrosilation reaction) completes.In this reaction, the polysiloxane of hydrogeneous compound official's energy is used as catalyzer as the platinic compound of linking agent (vulcanizing agent), Platinic chloride or other solubility.Vulcanization reaction at room temperature carries out.By product is not emitted in reaction.Owing to not emitting low-molecular material in cross-linking process, so addition type room temperature vulcanized silicone rubber does not produce contraction in sulfidation.
Addition type room temperature vulcanized silicone rubber provided by the invention (RTV) adopts bicomponent structure putty type, has simple to operately, and curing time is short, the advantages such as good mechanical property.Can be widely used in industrial molding, the reproduction of the cultural relics, electronics encapsulating, electronic shock waterproof, a plurality of fields such as buccal impression.
Summary of the invention
Purpose of the present invention aims to provide a kind of two-component silicone rubber mixing material, and a kind of addition type room temperature vulcanized (RTV) silicon rubber mixing material and preparation method thereof especially is provided.
Two-component silicone rubber mixing material of the present invention comprises body (base) component and catalyzer (catalyst) component, by bulk component and catalyst component, according to mass fraction 1:1, is in harmonious proportion and forms.
Calculate one or more polysiloxane that at least each molecule contains two vinyl that body (base) component is 20-65 part according to mass fraction; One or more polysiloxane that at least each molecule contains three or three above Si-H groups of 1-8 part; The expanding material of 5-35 part; The toughener of 1-10 part; 0.5-3 the hydrophilic modifying agent of part; 0.01-2 nano-photocatalyst material and other auxiliary agents of part form.
Calculate one or more polysiloxane that at least each molecule contains two vinyl that catalyzer (catalyst) component is 20-65 part according to mass fraction; The expanding material of 0-35 part; The toughener of 1-10 part; 0.5-3 the platinum catalyst of part; 0.01-2 nano-photocatalyst material and other auxiliary agents of part form.
Above-mentioned vinyl polysiloxane is linearity or the branching vinyl silicone oil with vinyl, at least has two vinyl, and viscosity is between the 1-7000Pa.s scope, and its molecular formula is as follows:
R=C wherein
nH
2n-1
The above-mentioned polysiloxane containing the Si-H group is that viscosity is 1-6500Pa.s, and the Si-H linkage content is the 0.1-1.5 containing hydrogen silicone oil.Its molecular formula is as follows:
R=C wherein
nH
2n-1
Above-mentioned platinum catalyst is Platinic chloride and vinyl polysiloxane complex compound, and its vinyl polysiloxane contains one or more vinyl groups.
Above-mentioned solubilizing agent includes, but are not limited to calcium carbonate, kaolin, silica powder, and its specific surface area is more than 1000 orders.
Above-mentioned toughener includes, but are not limited to the MQ resin, gas-phase silica, and talcum powder, mica powder, gas-phase silica wherein, talcum powder, the specific surface area of mica powder is more than 1000 orders.
Above-mentioned hydrophilic modifying agent includes, but are not limited to one or more composition and undersaturated polyethers and the nonionic surface active agent title complex in anion surfactant, cats product, nonionic surface active agent, amphoterics.
Aniorfic surfactant includes, but are not limited on alkyl band the have an appointment water-soluble cpds and composition thereof of sulfonated monoglyceride of lipid acid of 8-20 carbon atoms of water-soluble cpds (such as sodium alkyl sulfate), the band of alkyl-sulphate of 8-20 carbon atoms of having an appointment.Aniorfic surfactant such as sodium lauryl sulphate, cocounut oil monoglyceride sulfonates, phospholipid; Sarcosinate, such as sarcosyl, taurate, lauryl sulfoacetate sodium, laurylamide ethylsulfonic acid sodium, laureth 9 sodium sulfate and Sodium dodecylbenzene sulfonate.
Cats product includes, but are not limited on alkyl band have an appointment water-soluble cpds (such as hexadecyl bromination pyrroles), the band of quaternary ammonium salt of 10-18 carbon atoms the have an appointment amine salt compound (such as the octadecyl stearyl amine hydrochloride) of 10-18 carbon atoms, the compound (such as 2-alkyl imidazoline) of heterocyclic.Cats product such as palmityl trimethyl ammonium chloride, 2-alkyl imidazoline, dodecyl dimethyl phenyl bromo-phosphonium, stearyl dimethyl benzyl ammonium chloride, dioctadecylamine hydrochloride, N, Dymanthine hydrochloride and hexadecyl bromination pyrroles.
Nonionic surface active agent includes, but are not limited to comprise the compound (can produce by the organo-phobicity compound condensation that makes oxirane alkyl and aliphatic series or alkyl-aromatics) of wetting ability and hydrophobicity composition.The ethylene oxide condensate of the polyoxyethylene alkene condensate such as low viscosity Natvosol, polysorbate class, polyoxyethylene sorbitan esters class, fatty alcohol ethoxylate, alkylbenzene phenols of suitable nonionic surface active agent, the product that derives from the condensation of oxyethane and propylene oxide and reacting ethylenediamine product, aliphatic alcohol class, long chain tertiary amine oxide compound, long chain tertiary phosphine oxide, long-chain dialkyl sulphoxide class and composition thereof.
Amphoterics can comprise, but be not limited to the derivative of the aliphatic series second month in a season and tertiary amines, wherein aliphatic composition can be had an appointment 8-18 carbon atoms and contain the anionic water soluble group for one of straight or branched and aliphatic substituting group are contained, such as carboxylate salt, sulfonate, vitriol, phosphoric acid salt, sweet Lay alkali, particularly AMONYL 380LC and composition thereof.
Undersaturated polyethers and nonionic surface active agent title complex, is characterized in that it is two kinds of materials, one for HLB be the polyoxyethylene nonylphenol ether nonionic surface active agent that 8-11, pH are 6-8; Two make material possess hydrophilic material for a kind of vulcanization reaction that participates in.
Above-mentioned nano-photocatalyst material includes, but are not limited to gallium phosphide (GdP), gallium arsenide (GdAs), titanium dioxide (TiO
2), zinc oxide (ZnO), stannic oxide (SnO
2), zirconium dioxide (ZrO
2), Cadmium Sulfide (CdS), zinc sulphide (ZnS), Tungsten oxide 99.999 (WO
3), silicon-dioxide (SiO
2) in one or more composition.
Above-mentioned other auxiliary agents are appropriate essence, mill base, coupling agent and the agent etc. of drawing up.
This room temperature vulcanized silicone rubber can also contain the various additives that become known for rubber composition in the scope of not damaging the object of the invention.These additives comprise, but are not limited to mineral filler, organic solvent, mould inhibitor, courage combustion agent, thermo-stabilizer, softening agent, thixotropic agent.
Two-component silicone rubber mixing material preparation method of the present invention is by body (base) component and the separately preparation of catalyzer (catalyst) group, separately deposit, but preparation process is identical, specific as follows.
1) weighing liquid ingredient being uniformly mixed according to a certain percentage;
2) take a certain amount of powder component and join in the aforesaid liquid component, mediate evenly with kneader;
3) will mediate respectively uniform body (base) component and catalyzer (catalyst) component vacuum outgas 20min obtains finished product.
It is simple that two-component silicone rubber mixing material prepared by the present invention has the preparation method, good hydrophilic property, and elastic recovery is good, and tear strength is large, the shore hardness advantages of higher.Its curing time 2-3min, operating time 0.5-1.5min, shore hardness reaches more than 60, and elastic recovery reaches 99.8%, is a kind of silastic material of excellent performance.
Embodiment
Below by specific embodiment, the present invention will be further described.
Embodiment 1
The polydimethyl siloxane fluid that is 1Pa.s and the 420g viscosity ethenyl blocking that is 7000Pa.s by 230g viscosity, the organopolysiloxane mix and blend of the trimethyl silyl end-blocking that 10g viscosity is 3500Pa.s stirs; Add 200g1500 purpose calcium carbonate, the 10gMQ resin, the unsaturated end hydroxy polyether of 5g, 10g OP-10, the 0.5g nano titanium oxide is mediated 30min and is obtained body (base) component mixture in kneader, and then vacuum outgas is standby.
The polydimethyl siloxane fluid mix and blend that is 20Pa.s and the 220g viscosity ethenyl blocking that is 3500Pa.s by 150g viscosity, the 10g platinum catalyst stirs; Add 160g1500 purpose silica powder, 15g1500 purpose gas-phase silica, the 3g nano titanium oxide is mediated 30min and is obtained catalyzer (catalyst) component mixture in kneader, and then vacuum outgas is standby.
Body (base) component and catalyzer (catalyst) component that take equivalent mix, the performance of test silicon rubber.The operating time 45s of this silicon rubber, set time 2.5min, shore hardness 68, elastic recovery reaches 99.8%.
Embodiment 2
The polydimethyl siloxane fluid that is 200Pa.s and the 100g viscosity ethenyl blocking that is 3000Pa.s by 100g viscosity, the organopolysiloxane mix and blend of the trimethyl silyl end-blocking that 50g viscosity is 4000Pa.s stirs; Add 160g2000 purpose kaolin, 30g200 purpose talcum powder, the unsaturated end hydroxy polyether of 5g, the 10g tween-80,1g nano titanium oxide and appropriate Mint Essence are mediated 30min and are obtained body (base) component mixture in kneader, and then vacuum outgas is standby.
The polydimethyl siloxane fluid mix and blend that is 2Pa.s and the 430g viscosity ethenyl blocking that is 5500Pa.s by 250g viscosity, the 20g platinum catalyst stirs; Add 180g1600 purpose silica powder, 65g1500 purpose gas-phase silica, the 3g nano titanium oxide is mediated 30min and is obtained catalyzer (catalyst) component mixture in kneader, and then vacuum outgas is standby.
Body (base) component and catalyzer (catalyst) component that take equivalent mix, the performance of test silicon rubber.The operating time 60s of this silicon rubber, set time 3min, shore hardness 72, elastic recovery reaches 99.8%.
Embodiment 3
The polydimethyl siloxane fluid that is 30Pa.s and the 20g viscosity ethenyl blocking that is 6500Pa.s by 400g viscosity, the organopolysiloxane mix and blend of the trimethyl silyl end-blocking that 80g viscosity is 3500Pa.s stirs; Add 130g1500 purpose kaolin, 100g talcum powder, the unsaturated end hydroxy polyether of 10g, 3g OP-10, the 1g nano titanium oxide, appropriate blue mill base and appropriate Mint Essence are mediated 30min and are obtained body (base) component mixture in kneader, then vacuum outgas, standby.
The polydimethyl siloxane fluid mix and blend that is 20Pa.s and the 100g viscosity ethenyl blocking that is 3000Pa.s by 100g viscosity, the 8g platinum catalyst stirs; Add 350g2000 purpose silica powder, 15g1500 purpose gas-phase silica, the 2g nano titanium oxide is mediated 30min and is obtained catalyzer (catalyst) component mixture in kneader, and then vacuum outgas is standby.
Body (base) component and catalyzer (catalyst) component that take equivalent mix, the performance of test silicon rubber.The operating time 55s of this silicon rubber, set time 2min, shore hardness 66, elastic recovery reaches 99.8%.
Embodiment 4
The polydimethyl siloxane fluid that is 50Pa.s and the 120g viscosity ethenyl blocking that is 5600Pa.s by 550g viscosity, the organopolysiloxane mix and blend of the trimethyl silyl end-blocking that 60g viscosity is 6500Pa.s stirs; Add 200g1500 purpose calcium carbonate, the 15gMQ resin, the unsaturated end hydroxy polyether of 7g, 23g OP-10, the 1.5g nano titanium oxide is mediated 30min and is obtained body (base) component mixture in kneader, and then vacuum outgas is standby.
The polydimethyl siloxane fluid mix and blend that is 1Pa.s and the 520g viscosity ethenyl blocking that is 6500Pa.s by 50g viscosity, the 25g platinum catalyst stirs; 100g1500 purpose gas-phase silica, the 20g nano titanium oxide is mediated 30min and is obtained catalyzer (catalyst) component mixture in kneader, and then vacuum outgas is standby.
Body (base) component and catalyzer (catalyst) component that take equivalent mix, the performance of test silicon rubber.The operating time 90s of this silicon rubber, set time 2min, shore hardness 73, elastic recovery reaches 99.8%.
Embodiment 5
The polydimethyl siloxane fluid that is 50Pa.s and the 330g viscosity ethenyl blocking that is 4000Pa.s by 260g viscosity, the organopolysiloxane mix and blend of the trimethyl silyl end-blocking that 60g viscosity is 2500Pa.s stirs; Add 180g1500 purpose calcium carbonate, 10gMQ resin, the unsaturated end hydroxy polyether of 1g, the 4g tween 80,1.5g nano titanium oxide and 15gKH-570 silane coupling agent are mediated 30min and obtained body (base) component mixture in kneader, then vacuum outgas is standby.
The polydimethyl siloxane fluid mix and blend that is 1Pa.s and the 220g viscosity ethenyl blocking that is 7000Pa.s by 450g viscosity, the 6g platinum catalyst stirs; Add 210g1500 purpose silica powder, 10g1000 purpose gas-phase silica, the 0.1g nano titanium oxide is mediated 30min and is obtained catalyzer (catalyst) component mixture in kneader, and then vacuum outgas is standby.
Body (base) component and catalyzer (catalyst) component that take equivalent mix, the performance of test silicon rubber.The operating time 40s of this silicon rubber, set time 2.5min, shore hardness 63, elastic recovery reaches 99.8%.
Embodiment 6
The polydimethyl siloxane fluid that is 5Pa.s and the 120g viscosity ethenyl blocking that is 1000Pa.s by 370g viscosity, the organopolysiloxane mix and blend of the trimethyl silyl end-blocking that 5g viscosity is 500Pa.s stirs; Add 200g1000 purpose calcium carbonate, the 8gMQ resin, the unsaturated end hydroxy polyether of 6g, the 12g polyoxyethylene sorbitan esters, 0.8g nano titanium oxide, appropriate Mint Essence and 1g hexamethyldisilazane close in machine and obtain body (base) component mixture at kneading 30min, and then vacuum outgas is standby.
The polydimethyl siloxane fluid mix and blend that is 40Pa.s and the 420g viscosity ethenyl blocking that is 3000Pa.s by 170g viscosity, the 10g platinum catalyst stirs; Add 120g1500 purpose silica powder, 19g1000 purpose gas-phase silica, the 0.1g nano titanium oxide is mediated 30min and is obtained catalyzer (catalyst) component mixture in kneader, and then vacuum outgas is standby.
Body (base) component and catalyzer (catalyst) component that take equivalent mix, the performance of test silicon rubber.The operating time 30s of this silicon rubber, set time 2min, shore hardness 77, elastic recovery reaches 99.8%.
Claims (10)
1. an addition type room temperature vulcanized silicone rubber, is characterized in that comprising body (base) component and catalyzer (catalyst) component, by bulk component and catalyst component, according to mass fraction 1:1, is in harmonious proportion and forms.
A) calculate one or more polysiloxane that at least each molecule contains two vinyl that body (base) component is 20-65 part according to mass fraction; One or more polysiloxane that at least each molecule contains three or three above Si-H groups of 1-8 part; The expanding material of 5-35 part; The toughener of 1-10 part; 0.5-3 the hydrophilic modifying agent of part; 0.01-2 nano-photocatalyst material and other auxiliary agents of part form.
B) calculate one or more polysiloxane that at least each molecule contains two vinyl that catalyzer (catalyst) component is 20-65 part according to mass fraction; The expanding material of 0-35 part; The toughener of 1-10 part; 0.5-3 the platinum catalyst of part; 0.01-2 nano-photocatalyst material and other auxiliary agents of part form.
2. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that the vinyl polysiloxane is linearity or the branching vinyl silicone oil with vinyl, at least has two vinyl, and viscosity is between the 1-7000Pa.s scope, and its molecular formula is as follows:
R=C wherein
nH
2n-1.
3. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that the polysiloxane containing the Si-H group is that viscosity is 1-6500Pa.s, and the Si-H linkage content is the 0.1-1.5 containing hydrogen silicone oil.Its molecular formula is as follows:
R=C wherein
nH
2n-1.
4. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that platinum catalyst is Platinic chloride and vinyl polysiloxane complex compound, and its vinyl polysiloxane contains one or more vinyl groups.
5. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that solubilizing agent includes, but are not limited to calcium carbonate, kaolin, silica powder, and its specific surface area is more than 1000 orders.
6. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that toughener includes, but are not limited to the MQ resin, gas-phase silica, and talcum powder, mica powder, gas-phase silica wherein, talcum powder, the specific surface area of mica powder is more than 1000 orders.
7. addition type room temperature vulcanized silicone rubber as claimed in claim 1, it is characterized in that above-mentioned hydrophilic modifying agent includes, but are not limited to one or more composition and undersaturated polyethers and the nonionic surface active agent title complex in anion surfactant, cats product, nonionic surface active agent, amphoterics.
8. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that nano-photocatalyst material includes, but are not limited to gallium phosphide (GdP), gallium arsenide (GdAs), titanium dioxide (TiO
2), zinc oxide (ZnO), stannic oxide (SnO
2), zirconium dioxide (ZrO
2), Cadmium Sulfide (CdS), zinc sulphide (ZnS), Tungsten oxide 99.999 (WO
3), silicon-dioxide (SiO
2) in one or more composition.
9. addition type room temperature vulcanized silicone rubber as claimed in claim 1, is characterized in that other auxiliary agents are appropriate essence, mill base, coupling agent and the agent etc. of drawing up.
10. addition type room temperature vulcanized silicone rubber as claimed in claim 1, it is characterized in that two-component silicone rubber mixing material preparation method is by body (base) component and the separately preparation of catalyzer (catalyst) group, separately deposit, but preparation process is identical, specific as follows.
1) weighing liquid ingredient being uniformly mixed according to a certain percentage;
2) take a certain amount of powder component and join in the aforesaid liquid component, mediate evenly with kneader;
3) will mediate about uniform body (base) component and catalyzer (catalyst) component vacuum outgas 20min and obtain finished product.
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| CN104694004A (en) * | 2015-02-17 | 2015-06-10 | 成都拓利化工实业有限公司 | Solvent-free anti-pollution flashover organic silicon coating and preparation method thereof |
| CN104877349A (en) * | 2015-05-11 | 2015-09-02 | 上海应用技术学院 | Sodium alumino silicate modifying phenyl siloxane rubber composite material and preparation method thereof |
| CN105968819A (en) * | 2016-05-12 | 2016-09-28 | 浙江新安化工集团股份有限公司 | Key liquid silicone rubber composition with ultralong striking life and preparation method of key liquid silicone rubber composition |
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| CN107312177A (en) * | 2017-08-02 | 2017-11-03 | 王琪宇 | A kind of preparation method of cutting fluid polyether modified silicon oil processed |
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