CN108905305A - Organic silicon defoamer and preparation method thereof - Google Patents

Organic silicon defoamer and preparation method thereof Download PDF

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Publication number
CN108905305A
CN108905305A CN201811088553.1A CN201811088553A CN108905305A CN 108905305 A CN108905305 A CN 108905305A CN 201811088553 A CN201811088553 A CN 201811088553A CN 108905305 A CN108905305 A CN 108905305A
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China
Prior art keywords
parts
organic silicon
silicon defoamer
defoamer
water
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Pending
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CN201811088553.1A
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Inventor
李书兵
陈海平
蔡苗
徐海露
杜斌
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Hubei Xingrui Silicon Material Co Ltd
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Hubei Xingrui Silicon Material Co Ltd
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Priority to CN201811088553.1A priority Critical patent/CN108905305A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D19/00Degasification of liquids
    • B01D19/02Foam dispersion or prevention
    • B01D19/04Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
    • B01D19/0409Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Colloid Chemistry (AREA)
  • Degasification And Air Bubble Elimination (AREA)

Abstract

The present invention provides a kind of organic silicon defoamers, based on 1000 parts by weight of whole components, 50-500 parts of trifluompropyl methyl polysiloxanes;0-100 parts of hydroxy silicon oils;The inorganic particle of the 3-15 parts of groups containing reactive surfaces;5-15 parts of emulsifiers;0.1-1 parts of thickeners;1-10 parts of dispersing agents;Surplus is water.Specific steps:Organosilicon antifoam composition and white carbon black are mixed to get silicon cream.Silicon cream, emulsifier, water, thickener, dispersing agent are prepared into organic silicon defoamer lotion.Trifluompropyl methyl polysiloxane has lower surface energy, and therefore, for the defoaming agent compared with the preparation of conventional methyl silicone oil, the addition of trifluompropyl methyl polysiloxane reduces the surface tension of antifoaming system, the defoaming of the defoaming agent of raising and foam inhibition function.Again because methyl-silicone oil has certain dissolubility in oily phase, the addition of fluorohydrocarbon base is so that trifluompropyl methyl polysiloxane not readily dissolves the use system range for increasing organic silicon defoamer in oil-based system.

Description

Organic silicon defoamer and preparation method thereof
Technical field
The present invention relates to a kind of defoaming agent and preparation method thereof, in particular to a kind of organic silicon defoamer and its preparation side Method.
Background technique
It is easy to produce in textile sizing, the production process of the industries such as food fermentation, biological medicine, petroleum, chemical industry, coating Unwanted bubbles can seriously affect the quality of production efficiency and product if eliminating these unwanted bubbles not in time.It defoams at present Method mainly has physical method and chemical method.Physical method mainly include change bubbling system temperature, rapidly change system pressure, The two sides of bubble film are made to generate pressure difference.Chemical rule is that defoaming agent is added into system, by the skin covering of the surface for changing foam Intensity and surface layer tension, to achieve the effect that lather collapse.Physical method can only the short time removing unwanted bubbles, therefore work Chemical method defoaming is commonly used in industry.Common chemical method is that defoaming agent, organic silicon defoamer and general defoaming agent are added into system Small compared to surface tension, defoaming capacity is strong, and chemical stability is high, is not easy to chemically react with frothing media, so extensive Using.
CN103877755A provides a kind of organic silicon defoamer and preparation method thereof, mainly by dimethyl silicone polymer With hydroxy silicon oil as main defoaming substance, then organic silicon defoamer will be obtained after silicone oil emulsification again.This kind of organosilicon defoaming It is dimethyl silicone polymer that agent, which mainly defoams substance, although dimethyl silicone polymer have lower surface can, defoaming effect compared with It is good, but there are still surface can lower, defoaming effect more preferably defoam substance, and polydimethyl siloxane fluid has one in oil-based system Fixed dissolubility, therefore oil-based system cannot be used in.
Summary of the invention
For dimethyl silicone polymer, the organic silicon defoamer of trifluompropyl methyl polysiloxane preparation has more Low surface energy, therefore defoam more preferable with suds suppressing properties.Meanwhile fluorine-containing alkyl is insoluble in oil-based system, this makes poly- trifluoropropyl Methyl siloxane defoaming agent can preferably be used in oil-based system.To achieve the above object, present invention employs following skills Art scheme:
A kind of organic silicon defoamer, based on 1000 parts by weight of whole components, 50-500 parts of trifluompropyl methyl polysiloxanes; 0-100 parts of hydroxy silicon oils;The inorganic particle of the 3-15 parts of groups containing reactive surfaces;5-15 parts of emulsifiers;0.1-1 parts of thickeners; 1-10 parts of dispersing agents;Surplus is water.
Trifluompropyl methyl polysiloxane viscosity is 100mPa.s~1000mPa.s.
Hydroxy silicon oil viscosity is 50mPa.s~500mPa.s.
The inorganic particle of the group containing reactive surfaces is gas-phase silica, precipitated silica, aerosil, dioxy Change one of the modified titanium dioxide of titanium, N- (preferably N doping be titanium dioxide total amount 0.5-1%), quartz or It is several.
Emulsifier is nonionic emulsifier.Select Span-80, Tween-80, one or more of in NP-4, NP-10, cream HLB=5~15 of agent.
Thickener is selected from one of polyacrylate, polyvinyl alcohol, Sodium Polyacrylate.
Dispersing agent is selected from one of methyl anyl alcohol, cellulose derivative, guar gum
The wet concentration selects one kind of distilled water, deionized water, ultrapure water
A kind of preparation method of organic silicon defoamer, including steps are as follows:
(1) trifluompropyl methyl polysiloxane and hydroxy silicon oil are added in a kettle, then is added and contains into reaction kettle The inorganic particle of reactive surfaces group, temperature are 100-150 DEG C, mixing speed 100-500r/min, stir 2-4h, are made Silicon cream.
(2) it takes the silicon cream prepared to be placed in reaction kettle, emulsifier, mixing speed 2500- is added while stirring 3500r/min.Water, thickener and dispersing agent, 60-80 DEG C of emulsification 30-60min is then added and obtains organic silicon defoamer.
Compared with the prior art, the present invention has the advantages that:
(1) trifluompropyl methyl polysiloxane has lower surface energy than conventional use of dimethyl silicone polymer, because The addition of this trifluompropyl methyl polysiloxane is so that organic silicon defoamer has preferably defoaming and foam inhibition effect.
(2) organic silicon defoamer of dimethyl silicone polymer preparation has certain dissolubility in oily phase, therefore cannot make For oil-based system, and the addition of fluoropropyl reduces solvent borne of the trifluompropyl methyl polysiloxane in oil-based system, because The defoaming agent of this trifluompropyl methyl polysiloxane preparation can be used in oil-based system.
(3) trifluompropyl methyl polysiloxane compound with hydroxy silicon oil by the present invention improves defoaming and foam inhibition effect Fruit reduces costs for the defoaming agent of trifluompropyl methyl polysiloxane preparation is used alone.
Specific embodiment
The technical solution in the present invention is further illustrated below with reference to embodiment.
Embodiment 1
(1) 90g trifluompropyl methyl polysiloxane and 5g hydroxy silicon oil are placed in reaction kettle, poly- trifluoro propyl methyl silicon The viscosity of oxygen alkane is 500mPa.s, and temperature is set as 120 DEG C, mixing speed 300r/min, then is slowly added into silicone oil 5g fume colloidal silica (specific surface area 450m2/ g), 3h is stirred, silicon cream is made.
(2) the 100g silicon cream prepared is taken to be placed in reaction kettle, reaction temperature is set as 65 DEG C, by Span-80 and tween- 80 are compounded, and wherein Span-80 quality is 42.5g, and Tween-80 quality is 27.5g.The emulsifier compounded is slowly added to In silicone oil, the revolving speed of mulser is that the water of 824g is slowly added into reaction kettle by 3000r/min after emulsifier adds, 0.5g polyvinyl alcohol is then added, 5.5g methyl anyl alcohol obtains organic silicon defoamer after emulsifying 40min.
Embodiment 2
(1) 84g trifluompropyl methyl polysiloxane and 8g hydroxy silicon oil are placed in reaction kettle, poly- trifluoro propyl methyl silicon The viscosity of oxygen alkane is 500mPa.s, and temperature is set as 150 DEG C, mixing speed 300r/min, then is slowly added into silicone oil (wherein N doping is the 0.8% of titanium dioxide total amount, specific surface area 300m to 8g N- modified titanium dioxide2/ g), stirring Silicon cream is made in 3h.
(2) the 100g silicon cream prepared is taken to be placed in reaction kettle, reaction temperature is set as 70 DEG C, by Span-80 and tween- 80 are compounded, and wherein Span-80 quality is 42.5g, and Tween-80 quality is 27.5g.The emulsifier compounded is slowly added to In silicone oil, the revolving speed of mulser is that the water of 824g is slowly added into reaction kettle by 3000r/min after emulsifier adds, 0.5g polyvinyl alcohol is then added, 5.5g methyl anyl alcohol obtains organic silicon defoamer after emulsifying 40min.
Embodiment 3
(1) 85g trifluompropyl methyl polysiloxane and 10g hydroxy silicon oil are placed in reaction kettle, poly- trifluoro propyl methyl Siloxanes viscosity is 500mPa.s, and the viscosity of hydroxy silicon oil is 100mPa.s, and temperature is set as 120 DEG C, mixing speed 300r/ Min, then 5g titanium dioxide (specific surface area 350m is slowly added into silicone oil2/ g), 3h is stirred, silicon cream is made.
(2) the 100g silicon cream prepared is taken to be placed in reaction kettle, reaction temperature is set as 65 DEG C, by Span-80 and tween- 80 are compounded, and wherein Span-80 quality is 42.5g, and Tween-80 quality is 27.5g.The emulsifier compounded is slowly added to In silicone oil, the revolving speed of mulser is that the water of 824g is slowly added into reaction kettle by 3000r/min after emulsifier adds, 0.5g polyvinyl alcohol is then added, 5.5g methyl anyl alcohol obtains organic silicon defoamer after emulsifying 40min.
Embodiment 4
(1) 170g trifluompropyl methyl polysiloxane and 20g hydroxy silicon oil are placed in reaction kettle, poly- trifluoro propyl methyl Siloxanes viscosity is 500mPa.s, and the viscosity of hydroxy silicon oil is 100mPa.s, and temperature is set as 120 DEG C, mixing speed 300r/ Min, then 10g hydrophobic silicon dioxide aerogel (specific surface area 550m is slowly added into silicone oil2/ g), stir 3h, system Obtain silicon cream.
(2) the 200g silicon cream prepared is taken to be placed in reaction kettle, reaction temperature is set as 65 DEG C, by Span-80 and tween- 80 are compounded, and wherein Span-80 quality is 85g, and Tween-80 quality is 55g.The emulsifier compounded is slowly added to silicone oil In, the revolving speed of mulser is that the water of 654g is slowly added into reaction kettle, then by 3000r/min after emulsifier adds 0.5g polyvinyl alcohol is added, 5.5g methyl anyl alcohol obtains organic silicon defoamer after emulsifying 40min.
Comparative example 1
(1) 95g dimethyl silicone polymer is placed in reaction kettle, the viscosity of dimethyl silicone polymer is 500mPa.s, temperature Degree is set as 120 DEG C, mixing speed 300r/min, then 5g fume colloidal silica is slowly added into silicone oil, stirs 3h, system Obtain silicon cream.
(2) the 100g silicon cream prepared is taken to be placed in reaction kettle, reaction temperature is set as 65 DEG C, by Span-80 and tween- 80 are compounded, and wherein Span-80 quality is 42.5g, and Tween-80 quality is 27.5g.The emulsifier compounded is slowly added to In silicone oil, the revolving speed of mulser is that the water of 824g is slowly added into reaction kettle by 3000r/min after emulsifier adds, 0.5g polyvinyl alcohol is then added, 5.5g methyl anyl alcohol obtains organic silicon defoamer after emulsifying 40min.
Comparative example 2
(1) 190g dimethyl silicone polymer is placed in reaction kettle, the viscosity of dimethyl silicone polymer is 500mPa.s, temperature Degree is set as 120 DEG C, mixing speed 300r/min, then 10g fume colloidal silica is slowly added into silicone oil, stirs 3h, Silicon cream is made.
(2) the 200g silicon cream prepared is taken to be placed in reaction kettle, reaction temperature is set as 65 DEG C, by Span-80 and tween- 80 are compounded, and wherein Span-80 quality is 85g, and Tween-80 quality is 55g.The emulsifier compounded is slowly added to silicone oil In, the revolving speed of mulser is that the water of 654g is slowly added into reaction kettle, then by 3000r/min after emulsifier adds 0.5g polyvinyl alcohol is added, 5.5g methyl anyl alcohol obtains organic silicon defoamer after emulsifying 40min.
Defoaming agent of the invention is detected, and key data is as follows:
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (9)

1. a kind of organic silicon defoamer, it is characterised in that:Based on 1000 parts by weight of whole components, 50-500 parts of poly- trifluoro propyl first Radical siloxane;1-10 parts of hydroxy silicon oils;The inorganic particle of the 3-15 parts of groups containing reactive surfaces;5-15 parts of emulsifiers;0.1-1 parts Thickener;1-10 parts of dispersing agents;Surplus is water.
2. organic silicon defoamer as described in claim 1, it is characterised in that:Trifluompropyl methyl polysiloxane viscosity is 100mPa.s~1000mPa.s.
3. organic silicon defoamer as described in claim 1, it is characterised in that:Hydroxy silicon oil viscosity be 50mPa.s~ 500mPa.s。
4. organic silicon defoamer as described in claim 1, it is characterised in that:The inorganic particle of the group containing reactive surfaces is gas One of phase white carbon black, precipitated silica, aerosil, titanium dioxide, N modified titanium dioxide, quartz or It is several.
5. organic silicon defoamer as described in claim 1, it is characterised in that:Emulsifier is nonionic emulsifier, including department Class -80, Tween-80, one or more of in NP-4, NP-10, HLB=5 ~ 15 of emulsifier.
6. organic silicon defoamer as described in claim 1, it is characterised in that:The thickener is selected from polyacrylate, gathers Any one in vinyl alcohol, Sodium Polyacrylate.
7. organic silicon defoamer as described in claim 1, it is characterised in that:The dispersing agent is selected from methyl anyl alcohol, cellulose Any one in derivative, guar gum.
8. organic silicon defoamer as described in claim 1, it is characterised in that:The wet concentration selects distilled water, deionized water, ultrapure Any one in water.
9. the preparation method of the organic silicon defoamer as described in claim 1-8 appoints item, including steps are as follows:
(1)Trifluompropyl methyl polysiloxane and hydroxy silicon oil are added in a kettle, then is added into reaction kettle containing reaction Property surface group inorganic particle, temperature be 100-150 DEG C, mixing speed 100-500r/min, stir 2-4h, be made silicon Cream;
(2)It takes the silicon cream prepared to be placed in reaction kettle, emulsifier, mixing speed 2500-3500r/ is added while stirring Min is then added water, thickener and dispersing agent, 60-80 DEG C of emulsification 30-60min and obtains organic silicon defoamer.
CN201811088553.1A 2018-09-18 2018-09-18 Organic silicon defoamer and preparation method thereof Pending CN108905305A (en)

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Publication number Priority date Publication date Assignee Title
CN110280051A (en) * 2019-07-09 2019-09-27 四川省蜀爱新材料有限公司 A kind of low silicon defoaming agent
CN112774260A (en) * 2020-12-17 2021-05-11 新疆水处理工程技术研究中心有限公司 Polyether defoaming agent and preparation method thereof
CN113441101A (en) * 2020-03-26 2021-09-28 上海汇友消防技术有限公司 Novel disposal method for easily-fogging chlorine-containing compound leakage
CN114011117A (en) * 2021-11-29 2022-02-08 淄博爱迪毅环保技术有限公司 Defoaming agent and preparation method thereof

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110280051A (en) * 2019-07-09 2019-09-27 四川省蜀爱新材料有限公司 A kind of low silicon defoaming agent
CN110280051B (en) * 2019-07-09 2021-07-09 四川省蜀爱新材料有限公司 Low-silicon defoaming agent
CN113441101A (en) * 2020-03-26 2021-09-28 上海汇友消防技术有限公司 Novel disposal method for easily-fogging chlorine-containing compound leakage
CN113441101B (en) * 2020-03-26 2023-02-10 上海汇友消防技术有限公司 Disposal method for easily-fogging chlorine-containing compound leakage
CN112774260A (en) * 2020-12-17 2021-05-11 新疆水处理工程技术研究中心有限公司 Polyether defoaming agent and preparation method thereof
CN114011117A (en) * 2021-11-29 2022-02-08 淄博爱迪毅环保技术有限公司 Defoaming agent and preparation method thereof

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