CN103275493B - Organosilicon composition - Google Patents
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Abstract
The present invention relates to an organosilicon composition, wherein a hydrogen-containing polyorganosiloxane reacts with an organosilicon resin, then hydroxyl polyorganosiloxane is added, and a hydrophobic particle mixing treatment is performed to obtain the organsilicon composition. According to the present invention, the hydrogen-containing polyorganosiloxane reacts with the hydroxyl in the organosilicon resin, such that the organosilicon composition has a long branch chain siloxane space structure; and binding force of the organosilicon composition and an organic material is improved, and the synthesized organosilicon emulsion provides a good inhibition effect for foams in an anion surfactant-rich system.
Description
Technical field
The present invention relates to a kind of silicon composition that can be used for organic silicon emulsion.Therefore, the invention belongs to technical field of fine chemical preparations.
Background technology
Foam is phenomenon common in live and work.But foam can bring great harm sometimes in the industrial production, the quality etc. such as reduce the working efficiency of machine, incuring loss through delay working time, affect product.The method eliminating unwanted bubbles mainly contains physical method and chemical process, and defoamer froth breaking is one of chemical process.Along with the significantly raising of industrial enterprise's industrial scale and production efficiency, defoamer froth breaking is more widely used.At present, defoamer has been widely used in the industries such as papermaking, textile printing and dyeing, oil production and refining, coating, letex polymerization, sewage disposal, metal cleaning, and defoamer has become indispensable functional aid in production process.
According to the difference of defoaming composition, defoamer is divided into mineral oil origin, polyether-type and several main Types such as silicone based.Compared with other defoamers, poly organo siloxane defoamer stable chemical performance, side effect is little, also has good defoaming capacity when consumption is very low simultaneously and lasting presses down bubble ability, thus, being favored very much.
Defoaming composition is the core of defoamer, and its antifoaming speed and suds suppressing properties directly affect the performance of the finished product.For silicone based defoamer, the improvement of the antifoaming performance of its actives is the improvement direction of silicone antifoam agent.The most original polysiloxane defoamers actives is obtained through specific process technology process by polydimethylsiloxane and silicon-dioxide, as the defoaming agent composition that US3383327 introduces.But because it can not press down bubble lastingly, namely suds suppressing properties is poor, therefore, researchist both domestic and external has carried out large-scale expansion research to its performance.US4338217A1 alkoxy polysiloxane replaces conventional silicone and silicon dioxide granule combination treatment to obtain defoaming composition; US5824739 introducing amino-polysiloxane or carboxyl polysiloxane, as the main body of defoaming composition, obtain defoaming composition with silicon-dioxide combination treatment; EP163541B1 introduction is reacted with the organopolysiloxane containing other active function groups with the polysiloxane containing terminal hydroxyl and is formed side chain organopolysiloxane under the effect of catalyzer, and replace conventional silicone and hydrophilic silicon dioxide combination treatment with this, obtained defoamer has very high viscosity, is difficult to this emulsion dispersion in water.US5153258 introduces in system, introduces the antifoaming performance that lightly crosslinked organopolysiloxane can improve composition, such as under the effect of catalyzer, crosslinking reaction occurs containing vinyl organopolysiloxane and hydrogeneous organopolysiloxane, hydroxyl organopolysiloxane and alkyl silicate, but crosslinking degree is difficult to control.US5486306 describe a kind of directly with hydrogeneous organopolysiloxane and α-
Olefine reaction synthesis defoamer is used in washing powder, and the synthesis of this technique is simple, but the defoamer antifoam performance obtained is poor, easily produces silicon spot with clothing in contact; After describing hydrogeneous organopolysiloxane and the reaction of vinyl organopolysiloxane in WO2007137948A1, add the polydimethylsiloxane dilution of trimethylsiloxy group end-blocking, in above-mentioned patent when hydrogeneous organopolysiloxane and the reaction of vinyl organopolysiloxane, viscosity is large, wayward, the defoaming agent composition antifoaming performance obtained is poor.CN1931417A discloses a kind of defoaming agent composition of high temperature resistant resistance to highly basic, it is obtained by polysiloxane and silicone resin crosslinking reaction, actives is prepared into test performance after emulsion, it has good suds suppressing properties, but antifoaming speed needs to be improved further, and, because defoaming composition viscosity is comparatively large, be dispersed in water quite difficulty.
EP-A341952 introduces the composition of silicone antifoam agent and the polyethers-polysiloxane copolymer using branching as defoamer, in pulp production.US5523019 introduces the composition of mineral oil and polyethers-polysiloxane copolymer as defoamer, it is said to have positive effect.According to WO 98/000216, the siloxanes containing dimethyl-3-hydroxypropyl-polyoxyethylene polyoxypropylene group is specially suitable tensio-active agent in defoamer formulation.Defoaming agent composition suds suppressing properties difference in above-mentioned patent or the large more difficult emulsification of viscosity.
The present inventor finds to be formed in the process of silicon composition in the reaction of hydrogeneous organopolysiloxane, silicone resin and hydroxyl organopolysiloxane, if hydrogeneous organopolysiloxane is direct and the reaction of hydroxyl organopolysiloxane, do not react with silicone resin, the silicon composition crosslinking degree obtained is excessive, and viscosity is difficult to control.If but hydrogeneous organopolysiloxane, hydroxyl organopolysiloxane and silicone resin are reacted jointly, the silicon composition suds suppressing properties obtained is poor.
Summary of the invention
The present invention is reacted based on hydrogeneous organopolysiloxane and silicone resin by a kind of, then adds hydroxyl organopolysiloxane, through hydrophobic particles combination treatment, obtains silicon composition.Because the hydroxyl in hydrogeneous organopolysiloxane and silicone resin reacts, silicon composition is made to have the siloxanes space structure of long-chain branch, improve the bonding force of silicon composition and organic materials, after synthesizing organo-silicon emulsion, in the system being rich in anion surfactant, have good restraining effect to foam.
technical scheme
A kind of silicon composition, is characterized in that it is made up of following material:
a. modified polyorganosiloxanes
Modified polyorganosiloxanes of the present invention is hydrogeneous organopolysiloxane, silicone resin and hydroxyl organopolysiloxane are obtained by reacting.
a1. hydrogeneous organopolysiloxane
At least one general structure is following hydrogeneous organopolysiloxane:
H
c Me 3-cSiO( MeHSiO)
a(
Me 2SiO)
bSi
Me 3-cH
c
mefor methyl, subscript c be 0,1 or 2, a be 2 ~ 100 integer, b is the integer of 20 ~ 300, and each molecule has the hydrogen atom of at least 2 silicon bondings.The consumption of described hydrogeneous organopolysiloxane is 45 ~ 70% of silicon composition total mass.
a2. silicone resin
Conventional silicone resin is a kind of silicone resin of space structure, preferred silicone-containing unit R
asiO
4-a/2, wherein R is hydroxyl, alkyl or-oxyl, and a is 0.5 ~ 2.4; More preferably containing M functional group R
0 3siO
1/2with Q functional group SiO
4/2, wherein R
0for univalence hydrocarbyl, the mol ratio of M:Q is (0.4 ~ 1.2): 1.0, is preferably (0.5 ~ 0.8): 1.0.Most preferred silicone resin is only made up of M base as defined above and Q base, but also can use and comprise M base, trivalent R
0siO
3/2(T) resin of base and Q base.Silicone resin also can contain divalent unit R
0siO
2/2, preferably it is no more than 20% of the siloxane unit of all existence.Described radicals R (and R
0) identical or different, preferably there is the alkyl of 1 ~ 6 carbon atom, most preferable, ethyl or phenyl.Also other alkyl can be there is, such as, with the alkenyl with 1 ~ 6 carbon atom that dimethylvinylsilyl exists.Also the alkoxyl group with silicon bonding can be there is, such as methoxyl group.Also hydrogen base, hydroxyl with silicon bonding can be there is.Silicone resin by being hydrolyzed some silane material, in a solvent or produced in situ.Under existence particularly preferably in solvent (such as dimethylbenzene), make the precursor of tetravalence siloxy groups (such as four ortho-silicates, tetraethylorthosilicise, poly-ethyl silicate or water glass) and the precursor hydrolysis of monovalence trialkylsiloxy unit (such as, trimethylchlorosilane, trimethylethoxysilane, hexamethyldisiloxane or hexamethyldisilazane) and condensation.The present invention selects the silicone resin containing oh group, and the consumption of silicone resin is 1 ~ 10% of silicon composition total mass.
a3. hydroxyl organopolysiloxane
The general structure of described hydroxyl organopolysiloxane is as follows:
HO(SiR
1 2O)
mH
R in formula
1base is identical or different, is the alkyl of carbonatoms 1 ~ 30, comprises methyl, ethyl, propyl group, n-propyl, butyl, isobutyl-, and preferred carbonatoms is 1 ~ 10; Or carbonatoms is the aryl of 6 ~ 20, comprise phenyl, phenmethyl; Or carbonatoms is the aralkyl of 7 ~ 20; Subscript m is the integer of 500 ~ 3000; The consumption of described hydroxyl organopolysiloxane is 15 ~ 45% of silicon composition total mass.
a4. catalyzer
Catalyzer is used for the hydrogeneous organopolysiloxane of catalyst component and silicone resin, hydroxyl organopolysiloxane generation condensation reaction.Described catalyzer is selected from platinum-ol complex compound, platinum-alkene complex, platinum-ol salt complex, platinum-ether complexes, platinum-one complex compound, isopropyl alcohol solution of chloroplatinic acid, platinum-vinyl complex compound, stannous octoate.Preferred platinum content is the isopropyl alcohol solution of chloroplatinic acid of 1 ~ 20ppm.
b. hydrophobic particles
Hydrophobic particles comprises silicon-dioxide, titanium dioxide, silica powder, aluminum oxide, pure aluminium silicate, zinc oxide, magnesium oxide, or both or both above mixtures.More above-mentioned particles are not hydrophobic in itself, but can make it hydrophobization use yet.Such as by making it hydrophobization by fatty acid treatment, but carry out preferably by the methyl substituted organosilicon material of use.Suitable hydrophobizing agent comprises polydimethylsiloxane, have silanol or with the alkoxy end-capped dimethylsiloxane polymer of silicon bonding, hexamethyldisilazane and hexamethyldisiloxane.Usually at least 80 DEG C, hydrophobization is carried out.The preferred silicon-dioxide of the present invention, its specific surface area is 50 ~ 500 m
2/ g, hydrophobic value is 50 ~ 70%.It is divided into precipitated silica and fumed silica two kinds by manufacture method, is divided into hydrophilic silicon dioxide and water drain silica two kinds by surface properties.The present invention is preferably hydrophobic precipitated silicon dioxide and hydrophobic fumed silica.The consumption of described hydrophobic particles is 2 ~ 8% of silicon composition total mass.
The kinetic viscosity of described hydrogeneous organopolysiloxane 25 DEG C time is 80 ~ 1,500mPas.
The preparation method of described silicon composition is as follows:
1. hydrogeneous organopolysiloxane A1 and silicone resin A2 is joined in reaction vessel, and add catalyst A 4,50 ~ 120 DEG C time, react 0.5 ~ 1.5h;
2. add hydroxyl organopolysiloxane A3 again, 50 ~ 110 DEG C time, react 0.5 ~ 3h;
3. after completion of the reaction, add hydrophobic particles B, at 100 ~ 160 DEG C of insulation 1 ~ 5h, cool to room temperature, obtains described silicon composition.
A kind of method adopting above-mentioned silicon composition to prepare organic silicon emulsion, implementation method is: by silicon composition and emulsifying agent mixing, and progressively add water and thickening material, pass through mechanical means after mixing, as colloidal mill, clarifixator, preparation oil-in-water-type organic silicon emulsion.
Emulsifying agent comprises nonionogenic tenside and anion surfactant.
Described nonionogenic tenside is polyoxyethylene nonylphenol ether, polyoxyethylene octylphenol ether, lauric acid Soxylat A 25-7, oleic acid polyoxyethylene, sorbitan monostearate, sorbitan monooleate, anhydrous sorbitol tristearate, Witconol AL 69-66, anhydrous sorbitol Stearinsaeure polyoxyethylene ether-ester, anhydrous sorbitol list oleic acid polyoxyethylene ester, anhydrous sorbitol three stearic acid polyoxyethylene ether ester, castor oil polyoxyethylene ether.
Described anion surfactant is alkylpolyoxyethylene sodium sulfate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, sodium laurylsulfonate, sodium cetanesulfonate, cetyl benzenesulfonic acid sodium, disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate.
Thickening material is xanthan gum, guar gum, polyvinyl alcohol, Xylo-Mucine, Natvosol, polyacrylic acid, polyacrylamide, polyacrylate(s).
Embodiment
embodiment 1
Add that 200g viscosity is 800mPas, structural formula is in a reservoir
me 3siO (
mehSiO)
36(
me 2siO)
290si
me 3hydrogeneous organopolysiloxane, 25g silicone resin (M:Q=0.75:1) and platinum content be the isopropyl alcohol solution of chloroplatinic acid of 7ppm, at 70 DEG C of reaction 1h; Then 100g hydroxyl organopolysiloxane HO [(CH is added
2cH
3)
2siO]
500h, 90 DEG C of reaction 1h; Adding 15g specific surface area is 90m
2the hydrophobic precipitated silicon dioxide of/g, 100 DEG C of insulation 4h, namely obtain silicon composition S1 after being down to room temperature.
embodiment 2
Add that 250g viscosity is 600mPas, structural formula is H in a reservoir
me 2siO (
mehSiO)
70(
me 2siO)
250si
me 2the hydrogeneous organopolysiloxane of H, 25g silicone resin (M:Q=0.75:1) and platinum content are the isopropyl alcohol solution of chloroplatinic acid of 3ppm, at 100 DEG C of reaction 1.2h; Then 100g hydroxyl organopolysiloxane HO [(CH is added
3)
2siO]
1000h, 90 DEG C of reaction 1.5h; Adding 15g specific surface area is 150m
2the hydrophobic precipitated silicon dioxide of/g, 100 DEG C of insulation 2h, namely obtain silicon composition S2 after being down to room temperature.
embodiment 3
Add that 200g viscosity is 450mPas, structural formula is in a reservoir
me 3siO (
mehSiO)
26(
me 2siO)
200si
me 3hydrogeneous organopolysiloxane, 25g silicone resin (M:Q=0.75:1) and platinum content be the isopropyl alcohol solution of chloroplatinic acid of 11ppm, at 110 DEG C of reaction 1.5h; Then 50g hydroxyl organopolysiloxane HO [(CH is added
3)
2siO]
1500h, 100 DEG C of reaction 2h; Adding 18g specific surface area is 220m
2the hydrophobic fumed silica of/g, is cooled to 100 DEG C of insulation 4h, namely obtains silicon composition S3 after being down to room temperature.
embodiment 4
Add that 250g viscosity is 1000mPas, structural formula is in a reservoir
me 3siO (
mehSiO)
90(
me 2siO)
280si
me 3hydrogeneous organopolysiloxane, 25g silicone resin (M:Q=0.75:1) and platinum content be the isopropyl alcohol solution of chloroplatinic acid of 14ppm, at 60 DEG C of reaction 0.5h; Then 180g hydroxyl organopolysiloxane HO [(CH is added
3) (C
6h
5) SiO]
2000h, 80 DEG C of reaction 3h; Adding 18g specific surface area is 300m
2the hydrophobic precipitated silicon dioxide of/g, 150 DEG C of insulation 3h, namely obtain silicon composition S4 after being down to room temperature.
embodiment 5
Add that 250g viscosity is 100mPas, structural formula is H in a reservoir
me 2siO (
mehSiO)
26(
me 2siO)
50si
me 2the hydrogeneous organopolysiloxane of H, 25g silicone resin (M:Q=0.75:1) and platinum content are the isopropyl alcohol solution of chloroplatinic acid of 19ppm, at 70 DEG C of reaction 0.5h; Then 120g hydroxyl organopolysiloxane HO [(CH is added
3) (CH
2cH
3) SiO]
800h, 110 DEG C of reaction 0.5h; Adding 20g specific surface area is 100m
2the hydrophobic precipitated silicon dioxide of/g, 140 DEG C of insulation 5h, namely obtain silicon composition S5 after being down to room temperature.
embodiment 6
Add that 200g viscosity is 100mPas, structural formula is in a reservoir
me 3siO (
mehSiO)
26(
me 2siO)
50si
me 3hydrogeneous organopolysiloxane, 30g silicone resin (M:Q=0.75:1) and platinum content be the isopropyl alcohol solution of chloroplatinic acid of 15ppm, at 100 DEG C of reaction 1h; Then 180g hydroxyl organopolysiloxane HO [(CH is added
3)
2siO]
2900h, 70 DEG C of reaction 1.5h; Adding 20g specific surface area is 50m
2the hydrophobic fumed silica of/g, 100 DEG C of insulation 4h, namely obtain silicon composition S6 after being down to room temperature.
comparative example 1
Add that 200g viscosity is 800mPas, structural formula is in a reservoir
me 3siO (
mehSiO)
36(
me 2siO)
290si
me 3hydrogeneous organopolysiloxane, 100g hydroxyl organopolysiloxane HO [(CH
3)
2siO]
500h and platinum content are the isopropyl alcohol solution of chloroplatinic acid of 10ppm, after 70 DEG C of reaction 0.5h, add 25g silicone resin (M:Q=0.75:1), and be warming up to 150 DEG C of reaction 2h, then adding 15g specific surface area is 90m
2the hydrophobic precipitated silicon dioxide of/g, is cooled to 100 DEG C of insulation 4h, namely obtains silicon composition D1 after being down to room temperature.
comparative example 2
Add that 300g viscosity is 450mPas, structural formula is in a reservoir
me 3siO (
mehSiO)
26(
me 2siO)
200si
me 3hydrogeneous organopolysiloxane, 80g hydroxyl organopolysiloxane HO [(CH
3)
2siO]
1500h, 25g silicone resin (M:Q=0.75:1) and platinum content are the isopropyl alcohol solution of chloroplatinic acid of 14ppm, and be warming up to 150 DEG C of reaction 2h, then adding 18g specific surface area is 90m
2the hydrophobic fumed silica of/g, is cooled to 100 DEG C of insulation 4h, namely obtains silicon composition D2 after being down to room temperature.
embodiment 7 ~ 15
Conventionally, adopt above-mentioned S1 ~ S6, the silicon composition of D1 and D2 prepare organic silicon emulsion:
Under room temperature, 40g silicon composition, 8g Witconol AL 69-66 and 12g oleic acid polyoxyethylene (4) ether are under agitation fully mixed 40min, after completing, the temperature of above-mentioned system is increased to 80 DEG C, then, keep system temperature, add 40g water lentamente, improving stirring velocity makes it become emulsion oil-in-water from water-in-oil emulsion, continuing to add 20g water to mass concentration is 50%, cross the further emulsification of colloidal mill, finally being diluted to solid content with the acrylic thickener aqueous solution is 30%, obtains organosilicon emulsion defoaming agents M1 ~ 8.
organic silicon emulsion performance test
(1) testing method: with 0.5%(mass percent) sodium dodecyl benzene sulfonate aqueous solution be frothing media, above-mentioned frothing media 50mL is added in 100mL tool plug graduated cylinder, then the organosilicon emulsion defoaming agents of 0.010g is added, leave standstill after shake 50 times in vertical direction, record foam disappears to there is the liquid level time, is foam time T
50, then shake 50 record foam time T
100, every jolting just records foam time 50 times, and reach till 400 times until total shaking flask number of times, under identical jolting number of times, foam time is shorter, and what represent organic silicon emulsion disappears that to press down bubble effect better.Test result is in table 1:
The antifoam performance contrast of table 1 organic silicon emulsion
| Foam time/s | M1 | M2 | M3 | M4 | M5 | M6 | M7 | M8 |
| T 50 | 5 | 4 | 3 | 6 | 5 | 6 | 6 | 6 |
| T 100 | 4 | 5 | 3 | 7 | 6 | 5 | 7 | 5 |
| T 150 | 7 | 5 | 5 | 6 | 8 | 7 | 9 | 7 |
| T 200 | 8 | 6 | 6 | 6 | 9 | 7 | 9 | 8 |
| T 250 | 9 | 7 | 8 | 7 | 9 | 9 | 11 | 9 |
| T 300 | 9 | 7 | 9 | 8 | 10 | 9 | 14 | 15 |
| T 350 | 11 | 6 | 9 | 9 | 10 | 11 | 17 | 19 |
| T 400 | 11 | 7 | 10 | 10 | 11 | 10 | 23 | 23 |
As can be seen from upper table result, the performance of organosilicon emulsion defoaming agents M1 ~ 6 of synthesizing with silicon composition S1 ~ 6 of embodiment 1 ~ 6 is better than organosilicon emulsion defoaming agents M7 ~ 8 of silicon composition D1, D2 synthesis of 7,8 of comparative example, and this illustrates that silicon composition of the present invention has stronger defoaming capacity in anion systems.
(2) in washing composition, antifoam performance test is carried out
Testing apparatus: Portable circulation bubbling instrument
Probe temperature: 75 DEG C
Test traffic: 7L/min
Defoamer consumption: 0.4g
Frothing media: commercially available white cat washing composition, mass concentration is 0.5%
Testing method: clean the plant and instrument used.Add 600mL frothing media and defoamer, be heated to 75 DEG C; Under the flow of 7L/min, carry out circulation bubbling, record lather volume V is along with the Changing Pattern of time.The height of scale foam is lower at one time, then illustrate that the suds suppressing properties of defoamer is better.Test result is in table 2:
Antifoam performance test in table 2 washing composition
As can be seen from upper table result, be better than organic silicon emulsion M7 ~ 8 of silicon composition D1, D2 synthesis of 7,8 of comparative example by organic silicon emulsion M1 ~ 6 performance that silicon composition S1 ~ 6 of embodiment 1 ~ 6 are synthesized, this illustrates that defoaming composition of the present invention has stronger disappearing and presses down bubble ability in detergent system.
Claims (3)
1. a silicon composition, is characterized in that, each component and consumption as follows:
(A) modified polyorganosiloxanes, consists of:
(A1) hydrogeneous organopolysiloxane, at least containing a kind of following general structure:
H
c Me 3-cSiO(
MeHSiO)
a(
Me 2SiO)
bSi
Me 3-cH
c
In formula,
mefor methyl, subscript c be 0,1 or 2, a be 2 ~ 100 integer, b is the integer of 20 ~ 300, and each molecule has the hydrogen atom of at least 2 silicon bondings, and the consumption of described hydrogeneous organopolysiloxane is 45 ~ 70% of silicon composition total mass;
(A2) silicone resin, for containing M functional group R
0 3siO
1/2with Q functional group SiO
4/2, the mol ratio of M:Q is (0.5 ~ 0.8): 1.0, R
0identical or different, be selected from methyl, ethyl, phenyl, alkenyl, alkoxyl group, hydrogen base or hydroxyl, the consumption of described silicone resin is 1 ~ 10% of silicon composition total mass;
(A3) hydroxyl organopolysiloxane, general structure is: HO (SiR
1 2o)
mh, wherein R
1base is identical or different, be the alkyl of carbonatoms 1 ~ 30, or carbonatoms is the aryl of 6 ~ 20, or carbonatoms is the aralkyl of 7 ~ 20; Subscript m is the integer of 500 ~ 3000, and the consumption of described hydroxyl organopolysiloxane is 15 ~ 45% of silicon composition total mass;
(A4) catalyzer, for platinum content is the isopropyl alcohol solution of chloroplatinic acid of 1 ~ 20ppm;
(B) hydrophobic particles, be hydrophobic precipitated silicon dioxide or hydrophobic fumed silica, consumption is 2 ~ 8% of silicon composition total mass.
2. a kind of silicon composition according to claim 1, is characterized in that, wherein silicone resin A2 has oh group.
3. a preparation method for silicon composition according to claim 1, is characterized in that, comprises following steps:
1. hydrogeneous organopolysiloxane A1 and silicone resin A2 is joined in reaction vessel, and add catalyst A 4,50 ~ 120 DEG C time, react 0.5 ~ 1.5h;
2. add hydroxyl organopolysiloxane A3 again, 50 ~ 110 DEG C time, react 0.5 ~ 3h;
3. after completion of the reaction, add hydrophobic particles B, at 100 ~ 160 DEG C of insulation 1 ~ 5h, cool to room temperature, obtains described silicon composition.
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| WO2015196400A1 (en) * | 2014-06-26 | 2015-12-30 | Dow Corning (China) Holding Co., Ltd. | Emulsion type silicone pressure sensitive adhesive composition and process for the production thereof |
| CN104436766B (en) * | 2014-12-19 | 2016-05-11 | 江苏四新科技应用研究所股份有限公司 | A kind of silicon composition |
| CN105498304B (en) * | 2015-12-15 | 2017-10-03 | 江苏四新科技应用研究所股份有限公司 | A kind of defoaming composition and preparation method thereof |
| CN108102115B (en) * | 2017-12-26 | 2019-04-19 | 南京瑞思化学技术有限公司 | A kind of preparation method of polysiloxane emulsion |
| CN113512902B (en) * | 2020-04-09 | 2023-04-07 | 江苏四新科技应用研究所股份有限公司 | Organic silicon composite emulsion type defoaming agent for papermaking industry and preparation method thereof |
| CN113577835B (en) * | 2020-04-30 | 2024-03-29 | 江苏四新科技应用研究所股份有限公司 | Organic silicon composition |
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