CN101220206A - Silicone rubber composition which cures by condensation - Google Patents
Silicone rubber composition which cures by condensation Download PDFInfo
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- CN101220206A CN101220206A CNA2007101646868A CN200710164686A CN101220206A CN 101220206 A CN101220206 A CN 101220206A CN A2007101646868 A CNA2007101646868 A CN A2007101646868A CN 200710164686 A CN200710164686 A CN 200710164686A CN 101220206 A CN101220206 A CN 101220206A
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Abstract
A silicone rubber composition which cures by condensation is provided. After curing, the silicone rubber exhibits excellent insulation and antistatic properties, and this silicone rubber has overcome the problem of electrostatic adsorption of the dust in the air in the applications including a master template, tampon printing, and a large size industrial roll. The silicone rubber composition which cures by condensation contains an ion conductive antistatic agent.
Description
Technical field
The present invention relates to a kind of by condensation cured rubber composition with relate more specifically to a kind of rubber composition with excellent anti static behaviour and electrical insulating property.
Background technology
Silicon rubber has excellent weathering resistance and electrical property, hangs down thermotolerance, lower temperature resistance and other performances of compression deformation, improvement, and therefore, silicon rubber is used to extensive fields, comprising electrical equipment, automobile, material of construction, medicine, food.Wherein, provide a kind of elastic solidifying product by condensation cured room-temperature-curable rubber composition by at room temperature solidifying, and therefore such rubber composition is widely used in insulating material, sealing agent, packaged material, master masterplate (master template), the printing of refilling pad (tampon printing) and large-sized industrial roll.Under the situation of the large size industrial roll that is used for the large size stretching device, roller is very big, typically has 1 meter diameter and 5 meters length.Use the roller of the silicon rubber production of peroxide-curable in the point of contact of cured article and its adjacent place, to have defective, simultaneously, because the reason of size, be difficult to produce this roller, therefore can be used for producing this roller by condensation cured room-temperature-curable silicon rubber by the curable silicon rubber of the high temperature of addition curing.
Typically, provide these silicon rubber with the composition forms that comprises high organopolysiloxane of the polymerization degree and reinforcing filler,, and typically by using the blending equipment such as kneading model mixing machine and two roller, with base polymer and reinforcing filler and dispersant, prepare this composition.This organopolysiloxane and reinforcing filler, as silicon-dioxide is electrical insulator, and the rubber composition that obtains by the blend said components with have following defective by the silicon rubber that solidifies above-mentioned composition production: charge deposition when they contact with another material, occurs, and this can cause the problem that dust adsorbs in static and the air.Especially, under the situation of the large size industry draw roll that the stretching device that is used for drawing plastic film uses, such dust deposit can cause producing this serious problems of pin hole in by above-mentioned roller tensile plastics film.
Patent document 1) and carbon black (JP-A2002-507240:JP-A2002-327122: patent document 2 and 3) prepare antistatic rubber by using static inhibitor, as polyethers static inhibitor (JP-A2002-500237:.Wherein the polyethers static inhibitor has the defective that decomposition at high temperature can not reach sufficient antistatic effect.
Summary of the invention
The present invention is by finishing under the condition of considering above-mentioned situation, the object of the present invention is to provide a kind of simultaneously by condensation cured rubber composition, demonstrate the excellent insulativity and the silicon rubber of static resistance with production, and be applied to comprise that in master masterplate, the printing of refilling pad and the large size industrial roll, it has overcome the problem of dust electrostatic adhesion in the air.
To achieve these goals, the present inventor has carried out abundant research and discovery, in the time of in the static inhibitor of a small amount of ionic conductivity joins by condensation cured rubber composition, cured compositions demonstrates excellent insulativity and improved static resistance.The present invention finishes on the basis of above-mentioned discovery.
Therefore, the invention provides a kind ofly by condensation cured rubber composition, and this composition comprises the static inhibitor of ionic conductivity.After solidifying, this composition demonstrates excellent static resistance.
The invention effect
According to the present invention, provide a kind of by condensation cured rubber composition and had the excellent insulativity and the cured article of static resistance, and this goods allow random painted.
The description of specific embodiments
The present invention comprises a kind of static inhibitor of ionic conductivity by condensation cured rubber composition.
Used in the present invention is solidified rubber composition at room temperature by condensation cured rubber composition, especially comprise organopolysiloxane that each molecule has at least two silanol groups as the base polymer and the rubber composition of the reinforcing filler such as silicon-dioxide and the solidifying agent such as organoalkoxysilane randomly.More preferably, used in the present invention is the rubber composition that is prepared to (E) by the following component of blend (A) by condensation cured rubber composition:
(A) each molecule has the organopolysiloxane of at least two silanol groups,
(B) a kind of fine silica powder,
(C) a kind of tin curing catalysts,
(D) a kind of linking agent, and
(E) a kind of static inhibitor of ionic conductivity.
[(A) each molecule has the organopolysiloxane of at least two silanol]
Component (A) can comprise the compound shown in a kind of following average group accepted way of doing sth (1):
R wherein
1Independently be a kind of univalence hydrocarbyl of optional replacement, and n make its 25 ℃ to realize that down viscosity are 0.0001 to 0.5mm
2The positive number of/s.
General formula is used R in (1)
1The example of univalence hydrocarbyl of the optional replacement of expression comprises and contains maximum 10 carbon atoms, preferred 1 to 8 carbon atom, the more preferably low alkyl group of 1 to 6 carbon atom, methyl for example, ethyl, propyl group and butyl; Alkenyl, for example vinyl, allyl group, pseudoallyl, butenyl and hexenyl; (methyl) acryl; (methyl) acryloxy; Cycloalkyl is cyclohexyl for example; Aryl, for example phenyl, tolyl and naphthyl; Aralkyl is as phenmethyl and 2-styroyl; And any in all or part of these groups that replaced by halogen atom of hydrogen atom, chloromethyl and 3,3 for example, 3-trifluoro propyl; It comprises 1 to 10 carbon atom, preferred 1 to 8 carbon atom, more preferably 1 to 6 carbon atom.These univalence hydrocarbyls can have the hydrogen atom that is replaced by hydroxyl wholly or in part.Wherein preferable methyl, phenyl and 3,3,3-trifluoro propyl, and most preferable.
The quantity n of repeating unit makes that the viscosity of organopolysiloxane under 25 ℃ is 0.0001 to 0.5mm
2/ s, preferred 0.0005 to 0.1mm
2/ s and most preferably 0.0005 to 0.05mm
2The numerical value of/s.In the present invention, can measure viscosity by the Ostwald viscometer.
Organopolysiloxane typically mixes with basic catalyst or an acidic catalyst by mixing organic basic ring shape polysiloxane, heating this mixture comprises the cracking of siloxane bond and is connected to interior balanced reaction again with promotion, and water or contain the low-molecular weight compound termination reaction of silanol group, thereby produce the organopolysiloxane of general formula (1) expression.
The example of employed basic catalyst comprises potassium hydroxide, tetraalkyl hydroxide , and tetra-alkyl ammonium hydroxide, preferred potassium hydroxide.The example of an acidic catalyst comprises sulfuric acid, methylsulfonic acid and trifluoromethanesulfonic acid and preferred methylsulfonic acid.
The indefiniteness example of employed organopolysiloxane comprises that wherein Ph represents phenyl with the compound of following general formula (2-1) to (2-5) representative among the present invention.
In this chemical formula, n makes viscosity be 0.0001-0.5mm down at 25 ℃
2The number of/s.
In this chemical formula, m is at least 1 integer, and n ' is at least 0 integer, and condition is that m+n ' makes to realize down that at 25 ℃ viscosity are 0.0001-0.5mm
2The number of/s.
In this chemical formula, m is at least 1 integer, and n ' is at least 0 integer, and condition is that m+n ' makes to realize down that at 25 ℃ viscosity are 0.0001-0.5mm
2The number of/s.
In this chemical formula, m is at least 1 integer, and n ' is at least 0 integer, and condition is that m+n ' makes to realize down that at 25 ℃ viscosity are 0.0001-0.5mm
2The number of/s.
In this chemical formula, n makes to realize down that at 25 ℃ viscosity is 0.0001-0.5mm
2The number of/s.
[(B) fine silica powder]
According to the present invention, preferably include the organopolysiloxane of component (A) by condensation cured rubber composition, described organopolysiloxane has the fine silica powder (B) with its blend, with the performance of realizing ideal, for example physical strength.Be used for the enhanced fine silica powder and preferably have the surface of crossing with hydrophobizing agent (organic radical silicon compound) hydrophobically modified.Hydrophobically modified avoided with after component (A) is mixed gradually the viscosity that causes of accumulative silicone compounds increase, the result has obtained operating desired enough storage periods with after curing catalysts and solidifying agent (organoalkoxysilane) mix.
Do not limit the fine silica powder of handling with hydrophobizing agent especially, its example comprise traditional rubber composition employed those, as precipitated silica, pyrogenic silica and calcined silica.The preferred pyrogenic silica that uses is because it has the ability of improving rubbery intensity.
The surface treatment agent that is used for fine silica powder is a kind of organic radical silicon compound, and described organic radical silicon compound comprises monomer or its partial hydrolysis and the condensation product that contains hydrolysable group.More specifically, the preferred surface treatment agent that those can use monomethyl silyl, dimetylsilyl, trimethyl silyl or analogue coated silica micro mist of surface treatment agent (wherein, all keys of Siliciumatom have participated in the bonding with Sauerstoffatom in the silyl, described Sauerstoffatom has constituted the siloxane structure shown in the Si-O-Si, except the atom of those participations with the methyl bonding).
The surface treatment agent that exemplifies comprises six organic radical disilazane compounds, as 1, and 3-divinyl tetramethyl-disilazane, 1,3-dimethyl tetrem thiazolinyl disilazane and hexamethyldisilazane; The organic radical silazane, as prestox three silazane and 1,5-divinyl hexamethyl three silazane; Alkyltrialkoxysilaneand is as methyltrimethoxy silane, ethyl trimethoxy silane, propyl trimethoxy silicane and butyl trimethoxy silane; Dialkyl dialkoxy silicane is as dimethyldimethoxysil,ne, diethyl dimethoxy silane, dimethyldiethoxysilane and diethyl diethoxy silane; Alkenyl trialkoxy silane, for example vinyltriethoxysilane, vinyltrimethoxy silane and vinyl three (methoxy ethoxy) silane; Two alkenyl dialkoxy silicanes, for example divinyl dimethoxy silane and divinyl diethoxy silane; Trialkyl organoalkoxysilane, for example trimethylammonium methoxy silane and triethyl methoxy silane; Three alkenyl organoalkoxysilanes, for example trivinyl methoxy silane and trivinyl Ethoxysilane; Organic radical chlorosilane, for example trimethylchlorosilane, dimethyldichlorosilane(DMCS), METHYL TRICHLORO SILANE, vinyl trichloro silane, divinyl dichlorosilane and trivinyl chlorosilane; Silane coupling agent, for example r-chloropropyl trimethoxyl silane; And silicoorganic compound, for example dimethyl polysiloxane and organic hydrogen polysiloxanes; And the product of their partial hydrolysiss and condensation.Silane coupling agent preferably wherein, wherein on the Siliciumatom all substituting groups except being to be methyl the hydrolysable group; And organic radical silazane.Organic radical silazane most preferably.
Preferably, this fine silica powder hydrophobically modified in advance under pulverulence.Be not particularly limited the employed method of silica sphere hydrophobically modified, any method well known in the prior art may be used to this processing.In a kind of processing that exemplifies, fine silica powder to be processed and surface treatment agent at room temperature are introduced into the mechanical kneader of a sealing, and optional in the presence of the rare gas element and under the use catalyzer of choosing wantonly, under room temperature or high temperature, mediate this mixture.After the kneading, drying composite is to make the surface-treated product.
This hydrophobically modified has changed into hydrophobic grouping with the silanol group on the silicon-dioxide.The content that transforms hydrophobic grouping on the silicon-dioxide of back is counted according to carbon atom, preferably is at least 2.0 weight %, more preferably 2.0-20 weight %.Even more preferably 2.5-12 weight %, most preferably 3.0-8 weight %.Count when being lower than 2.0 weight % according to carbon atom when the amount of hydrophobic grouping on the silicon-dioxide, the insufficient problem of permanent stability may appear in mixed silicone compounds.
Can be according to-O-Si (CH
3)
3 13The C-NMR data are calculated on the silica sphere content of carbon in the hydrophobic grouping, above-mentioned group by with silazane or similarly the hydroxyl of the silanol on the silica sphere handle and obtain.
The fine silica powder of this hydrophobically modified can preferably have 50m at least
2The specific surface area of/g (this is by the BET absorption measurement), more preferably 50-600m
2/ g, most preferably 100-400m
2/ g.Specific surface area is less than 50m
2/ g may cause silicone compounds intensity low excessively.
The fine silica powder of above-mentioned hydrophobically modified can use separately, or uses in conjunction with two or more such powders.
The incorporation of component (B) comes in the component (A) of 100 weight parts, is preferably the 1-100 weight part, more preferably 5-50 weight part, most preferably 10-40 weight part.When mixing with the 1-100 weight part, the condensation cured rubber composition of gained will have excellent physical strength, operational suitability and processibility.
[(C) tin curing catalysts]
Tin curing catalysts (C) is used to promote the solidification process by condensation cured rubber composition.Example comprises carboxylate salt for example stannous octoate (tin octoate), stannous octoate (tin caprylate) and oleic acid tin; And organo-tin compound, as two tertiary carboxylic acids (diversatate) tin methide, two uncle's hydroxy acid dibutyl tins, oxalic acid two fourth tin, two sad two fourth tin, two oleic acid, two fourth tin, oxalic acid diphenyl tin, dibutyl tin oxide, dimethanol dibutyl tin, dibutyl two (triethoxy) tin, and two lauric acid dioctyl tins.The preferred metallic tin content that uses is as 1-50 weight %, preferably 5-40 weight %, the more preferably organo-tin compound of 8-35 weight %.
The incorporation of component (C) can be a catalytic amount.More specifically, the incorporation of component (C) comes in the component (A) of 100 weight parts, is preferably the 0.01-10 weight part, more preferably 0.1-5 weight part and most preferably 0.2-4 weight part.When content is the 0.01-10 weight part, the condensation cured rubber composition of gained will demonstrate excellent curability and release property, and when preparing the master masterplate (mastertemplate) by the curing said composition, gained master masterplate will demonstrate high durability when being used for molded polyurethane, and this solidified silicon rubber demonstrates excellent stability in storage, thermotolerance and other performances equally.
[(D) linking agent]
According to the present invention, comprise linking agent (D) and curing catalysts (C) together by what condensation cured rubber composition can be chosen wantonly, to increase the cross-linking density of solidifying product.The preferred cross-linking agents example is the compound shown in following general formula (3):
R
2 aSiX
4-a (3)
And/or or its partial hydrolysis and condensation product.R in the formula
2Be the optional univalence hydrocarbyl that replaces, X is a hydrolysable group, and a is 0 or 1.
General formula is used R in (3)
2The univalence hydrocarbyl of the optional replacement that exemplifies of expression comprises above for R
1Those groups of mentioning, preferably methyl, ethyl, propyl group, butyl, vinyl and phenyl, most preferably methyl.
The hydrolysable group of representing with X that exemplifies comprises alkoxyl group, as methoxyl group, oxyethyl group, propoxy-and butoxy, ketoxime base such as methyl ethyl ketone oximido, alkene oxygen base such as different propenyloxy group, acyloxy such as acetoxyl group, and aminooxy are as the dimethyl aminooxy, alkoxyl group preferably, and most preferably methoxyl group and oxyethyl group.
The linking agent that exemplifies comprises the trifunctional organoalkoxysilane, as methyltrimethoxy silane, Union carbide A-162, ethyl trimethoxy silane, ethyl triethoxysilane, butyl trimethoxy silane, butyl triethoxyl silane, vinyltrimethoxy silane, phenyltrimethoxysila,e and methyl three (methoxy ethoxy) silane; Four-functional group organoalkoxysilane such as tetramethoxy-silicane, tetraethoxysilane and tetrapropoxysilane; Methyl three propenyloxy group silane, methyl triacetoxysilane, vinyltriacetoxy silane, methyl three (fourth oxime) silane, vinyl three (fourth oxime) silane, phenyl three (fourth oxime) silane, propyl group three (fourth oxime) silane, four (fourth oxime) silane, 3,3, the product of 3-trifluoro propyl three (fourth oxime) silane, 3-chloropropyl three (fourth oxime) silane, methyl three (third oxime) silane, methyl three (pentoxime) silane, methyl three (isoamyl oxime) silane, vinyl three (ring pentoxime) silane, methyl three (hexamethylene oxime) silane and their partial hydrolysis and condensation.The product of organoalkoxysilane and partial hydrolysis thereof and condensation preferably.
The add-on of component (D) is come in the component (A) of 100 weight parts, is preferably the 0.1-10 weight part, more preferably 0.2-8 weight part and most preferably 0.3-5 weight part.When add-on during less than 0.1 weight part, can cause silicone compounds fully to solidify, when add-on during, can cause the physicals (hardness and intensity) that can't reach predetermined greater than 10 weight parts.
[(E) ionic conductivity static inhibitor]
In the present invention, by condensation cured comprise component (A) to the rubber composition of (D) as the conductive static inhibitor of component (E) hybrid ionic.
Do not limit the ionic conductivity static inhibitor by mixing in the condensation cured rubber composition among the present invention especially, as long as it is a kind of ionic conductivity material but not electronic conductivity material such as carbon black.Lithium salts preferably.
The example of this lithium salts comprises LiBF
4, LiClO
4, LiPF
6, LiAsF
6, LiSbF
6, LiSO
3CF
3, LiN (SO
2CF
3)
2, LiSO
3C
4F
9, LiC (SO
2CF
3)
3, and LiB (C
6H
5)
4, they can use separately, or in conjunction with two or more uses.
Thereby for improve dispersiveness by condensation cured rubber composition stable reach its advantage, preferably by conductive static inhibitor of hybrid ionic and organopolysiloxane, add the static inhibitor of ionic conductivity with paste form.In such a case, can use the used organopolysiloxane of rubber or oil form, and this organopolysiloxane is preferably polydimethylsiloxane or poly-ethylene methacrylic radical siloxane.In order to improve processibility, the filler such as strengthening silicon-dioxide or diatomite can be incorporated in this paste.In this case, organopolysiloxane can be the part of the organopolysiloxane of component (A), and filler can be the part of the fine silica powder of component (B).
The preferred 2-90 weight of the concentration % of the conductive static inhibitor of paste intermediate ion, more preferably 5-80 weight % and most preferably 10-50 weight %.The concentration of the static inhibitor of ionic conductivity is lower than 2 weight % can cause the static resistance deficiency, and the concentration that surpasses 90 weight % can cause too high quality change.
The add-on of the static inhibitor of ionic conductivity is counted the 0.0001-5 weight part with the component as base polymer (A) of 100 weight parts, preferred 0.0005-3 weight part, more preferably 0.001-1 weight part and most preferably 0.001-0.5 weight part.Add-on may cause the antistatic effect deficiency less than 0.0001 weight part, and add-on may cause insulating property losses or the physicals and the thermotolerance of silicon rubber caused disadvantageous effect greater than 5 weight parts.
[component that other is optional]
Rubber composition of the present invention also can comprise additive optional except said components (A) to (E), with other performance of further improvement composition.This optional additive scope does not affect adversely with the advantage by condensation cured rubber composition and exceeds.
A kind of additive that exemplifies be two ends all by the end capped dimethyl polysiloxane of trimethyl silyl, it adds the purpose of regulating viscosity to reach as a kind of thinner.Another example is the carbon black that adds as reinforcing filler, and it is as the sedimentary reagent of prevention, or conduct provides the additive of conductivity.Quartz powder, fused quartz, spherical silicon dioxide, diatomite, zeolite, lime carbonate, titanium dioxide, ferric oxide, aluminum oxide, spherical alumina, aluminium hydroxide, aluminium nitride and sal epsom can add as filler, extender, heat conductive filler equally.The lead compound that can add carbonate or hydroxide form comes radiation-screening.Other additives that exemplify comprise tinting material, as mineral dye or organic dye, and the reagent that is used to improve thermotolerance or flame retardant resistance, as cerium oxide, zinc carbonate, manganous carbonate, benzotriazole or platinic compound.Same, can add entry; Alcohols such as methyl alcohol, ethanol or propyl alcohol; Or cellosolve, methylcyclohexane for example promoting the curing of composition, or promotes the even curing of composition in whole compositions.
Can be in art technology in known mixing tank such as planetary-type mixer and the Shinagawa mixing tank, by blending ingredients (A) to (E) and other optional components, prepare rubber composition of the present invention.More specifically, can be by first blending ingredients (A) and (B), the static inhibitor component, component (D) and the component (C) that add ionic conductivity are then finished this mixing.
Gained rubber composition formula at room temperature can be vulcanized, and more specifically, this rubber composition can be through sulfuration in 16-72 hour under 10-30 ℃.
The volume specific resistance of gained rubber composition can be preferably 1G Ω m at least, and 2G Ω m especially at least is to realize the enough insulativity of practical application.
Can adopt electro static instrument (static honestmeter) (making) by Shishido static company limited, by come the treatment articles surface with corona discharge to be accumulated to the static charge of 6kV, and measuring voltage is reduced to half needed time (transformation period) of initial level, thereby estimate the antistatic property of sulfuration back rubber composition, this time (transformation period) is preferably in 2 minutes and especially in 1 minute.
Because cured composition has excellent insulativity and antistatic property, so can be used for extensive fields by condensation cured rubber composition among the present invention.This application that exemplifies comprises the large size industrial roll that material, the refilling pad of isolator, sealing agent, packaged material, manufacturing master masterplate print (tampon printing) material, use in the industrial drawing machine of for example large size.
Embodiment
Next by reference example and Comparative Examples the present invention is described in further detail, but described embodiment and Comparative Examples limitation of the scope of the invention anything but.
Operation by the following stated is measured the quantity of electric charge and intrinsic volume specific resistance.
The evaluation of the quantity of electric charge
Can adopt electro static instrument (static honestmeter) (making) by Shishido static company limited, by come the treatment articles surface with corona discharge, with the static charge of accumulation 6kV, and measuring voltage reduces to half needed time (transformation period) of initial level, thereby estimates the quantity of electric charge.
The evaluation of intrinsic volume specific resistance
Measure intrinsic volume specific resistance according to JIS-K6249.
Operation by the following stated prepares antistatic paste
[preparation of antistatic paste 1]
Mediate following compounds to prepare 1: 42 weight part end capped dimethyl polysiloxane of trimethyl silyl of antistatic paste, 8 weight part ratio surface-area are 110m
2The pyrogenic silica of the hydrophobically modified of/g (R-972 that makes by Nippon Aerosil), and 50 weight parts comprise 20 weight %LiN (SO
2CF
3)
2Adipic acid ester.
[preparation of antistatic paste 2]
Mediate following compounds to prepare 2: 42 weight part end capped dimethyl polysiloxanes of trimethyl silyl of antistatic paste, 8 weight part ratio surface-area are 110m
2The fumed silica of the hydrophobically modified of/g (by the R-972 of Nippon Aerosil manufacturing), and 50 weight parts are 75mm 25 ℃ of following viscosity
2The polyether-modified silicone oil of/s (KF351F is made by Shin-Etsu chemical company).
Embodiment 1
In kneader, mix the two ends of 100 weight parts all by the end capped dimethyl polysiloxane of silanol group (viscosity, 0.005mm
2/ s), (the Musil 120A that is made by Shin-Etsu chemical company, the specific surface area by the BET absorption measurement is 180m to the pyrogenic silica of 40 weight part hydrophobically modifieds
2/ g, and the amount of hydrophobic grouping is counted 2.8 weight % with carbon atom on the silica sphere), 5 parts of hexamethyldisilazanes, and 2.5 parts of water, and at room temperature mediated 1 hour.Next, internal temperature rose to 160 ℃ in the kneader in 60 minutes, continued to mediate other 4 hours under identical temperature.This composition of 100 weight parts is mixed with the antistatic paste 1 of 0.05 weight part and the solidifying agent of 5 weight parts, and this mixture stirs 1 minute down to make rubber composition at 25 ℃, wherein said solidifying agent is by the two lauric acid two hot tin (in metallic tin tin content is 16 weight %s) of 1.0 weight parts as curing catalysts, and 2.2 weight parts all are mixed with by the end capped dimethyl polysiloxane of trimethyl silyl as the phenyltrimethoxysila,e of linking agent and 1.8 weight part two ends.
Prepare the sheet material that thickness is 2mm by this rubber composition, and this sheet material solidified 72 hours down at 23 ℃.Estimate the quantity of electric charge (transformation period) and the inherent volume specific resistance of this silicon rubber sheet material, the result is as shown in table 1.
Embodiment 2
Except the add-on of antistatic paste 1 is 0.01 weight part, repeat the operation of embodiment 1, to measure the quantity of electric charge and inherent volume specific resistance, the result is as shown in table 1.
Comparative Examples 1
Except not adding the static inhibitor, repeat the operation of embodiment 1, to measure the quantity of electric charge and inherent volume specific resistance, the result is as shown in table 1.
Comparative Examples 2
Except with the antistatic paste 1 of antistatic paste 2 replacements, repeat the operation of embodiment 1, to measure the quantity of electric charge and inherent volume specific resistance, the result is as shown in table 1.
Table 1
| Embodiment | Comparative Examples | |||
| 1 | 2 | 1 | 2 | |
| The quantity of electric charge (transformation period) (6kV) | 1 second | 1 second | 90 seconds | 80 seconds |
| Inherent volume specific resistance (Ω m) | 1.20×10 15 | 1.50×10 14 | 1.70×10 15 | 2.80×10 14 |
Embodiment 3
At diameter is that 1000mm and length are that the liquid primer that coating is used for the curable at ambient temperature of silicon rubber AQ-1 on the stainless steel shaft of 5000mm (being made by Shin-Etsu chemical company) and this layer are coated with the composition cover among the embodiment 1.This one deck solidified 48 hours down at 23 ℃, and forming rubber thickness is that 20mm and length are the large size silica gel roller that is used for industrial use of 5000mm.
Roller as the stretching polyethylene film on the stretching machine is assembled this large size silica gel roller that is used for industrial use.Polyethylene film (1000m) stretches on this drawing machine, the existence of test formed pin hole when causing adhering to dust on the roller surface because of friction generation static.Do not find pin hole.
Comparative Examples 3
Use the composition of producing among the rubber composition replacement embodiment 1 of the room-temperature-curable of producing in the Comparative Examples 1 that does not contain static inhibitor, repeat the operation of embodiment 3.In the process of the same stretching polyethylene film of situation of embodiment 3, begin to form pin hole at the 560m place, and behind stretching 1000m, formed 32 pin holes.
Claims (8)
1. one kind by condensation cured and have the rubber composition of excellent antistatic property, wherein comprises the static inhibitor of ionic conductivity in the rubber composition.
2. as claimed in claim 1 by condensation cured rubber composition, wherein the static inhibitor of ionic conductivity is a kind of lithium salts.
3. as claimed in claim 2 by condensation cured rubber composition, wherein the static inhibitor of ionic conductivity is to be selected from LiBF
4, LiClO
4, LiPF
6, LiAsF
6, LiSbF
6, LiSO
3CF
3, LiN (SO
2CF
3)
2, LiSO
3C
4F
9, LiC (SO
2CF
3)
3And LiB (C
6H
5)
4In at least a lithium salts.
4. as claimed in claim 1 by condensation cured rubber composition, wherein the static inhibitor of ionic conductivity is to add by the paste form of using the organopolysiloxane preparation.
5. as claimed in claim 1 by condensation cured rubber composition, wherein the volume specific resistance that has of cured composition is at least 1G Ω m.
6. as claimed in claim 1 by condensation cured rubber composition, wherein this composition uses as the material of making the large size industrial roll.
7. as claimed in claim 1 by condensation cured rubber composition, wherein this composition is used to make the master masterplate.
8. as claimed in claim 1 by condensation cured rubber composition, wherein this composition uses as making refilling pad materials printed.
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| JP2006257315 | 2006-09-22 | ||
| JP2006257315 | 2006-09-22 | ||
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|---|---|
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| CN104603226A (en) * | 2012-09-05 | 2015-05-06 | 信越聚合物株式会社 | Antistatic release agent and antistatic release film |
| CN109233616A (en) * | 2017-05-12 | 2019-01-18 | 中国科学院化学研究所 | Aqueous printing plate composition, aqueous printing plate coating, aqueous printing plate and preparation method thereof and lithographic system and its application |
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| CN101805521A (en) * | 2010-03-19 | 2010-08-18 | 东莞市宏达新材料有限公司 | Antistatic silica gel composition and preparation method thereof |
| CN104603226A (en) * | 2012-09-05 | 2015-05-06 | 信越聚合物株式会社 | Antistatic release agent and antistatic release film |
| CN104603226B (en) * | 2012-09-05 | 2017-03-15 | 信越聚合物株式会社 | Anti- charging property remover and anti-charging property stripping film |
| US9624398B2 (en) | 2012-09-05 | 2017-04-18 | Shin-Etsu Polymer Co., Ltd. | Antistatic release agent and antistatic release film |
| CN103396758A (en) * | 2013-08-15 | 2013-11-20 | 成都硅宝科技股份有限公司 | Anti-static dealcoholization-type silicone sealant and preparation method thereof |
| CN109233616A (en) * | 2017-05-12 | 2019-01-18 | 中国科学院化学研究所 | Aqueous printing plate composition, aqueous printing plate coating, aqueous printing plate and preparation method thereof and lithographic system and its application |
| CN109233616B (en) * | 2017-05-12 | 2020-08-14 | 中国科学院化学研究所 | Composition for aqueous printing plate, coating for aqueous printing plate, method for producing aqueous printing plate, lithographic printing system, and application thereof |
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