CN103214896A - Efficient solid-liquid composite aqueous coating antifoaming agent composition and preparation technology thereof - Google Patents
Efficient solid-liquid composite aqueous coating antifoaming agent composition and preparation technology thereof Download PDFInfo
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- CN103214896A CN103214896A CN2012100175986A CN201210017598A CN103214896A CN 103214896 A CN103214896 A CN 103214896A CN 2012100175986 A CN2012100175986 A CN 2012100175986A CN 201210017598 A CN201210017598 A CN 201210017598A CN 103214896 A CN103214896 A CN 103214896A
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- froth breaking
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- defoamer
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Abstract
The invention relates to an efficient solid-liquid composite aqueous coating antifoaming agent composition and a preparation technology thereof. An antifoaming agent is composed of antifoaming particles having a uniform certain particle size and obtained through a properly-controlled homogenization and particle preparation disperse process, a non-polar antifoaming composition having an ultralow surface tension, and a carrier having easy distribution and penetration performances.
Description
Technical field
The present invention relates to the compound water-based coating of a kind of efficient solid-liquid composition of defoamer and preparation method thereof.
Background technology
The manufacturing processed of coating can as stirring, be ground etc. because of technological process; The interpolation of prescription, the importing of face/filler, the interpolation of wetting agent etc. cause the generation of bubble, the application meeting of coating makes the generation bubble of filming that applies because of employing such as spraying, brushing, roller coating or other different modes of technology, and then irregular surfaces such as vacuolar membrane or flake take place.Make the function of coating or printing ink protection ground and optimization surface decoration have a greatly reduced quality.Defoamer is the important aspect of this problem of solution, yet suitable use just can reach best effect.Because of infiltration or the expansionary force that its low surface tension brought, it is broken and remove vacuolar membrane.For the requirement of system compatibility, the difference of the demand of broken bubble intensity and the energy of constructing, every kind of coating system all has different demands.
In coating system, mostly foamy is stable is to be caused by interfacial agent, and they all are coating important interpolation composition constituent such as wetting agent, emulsifying agent, dispersion agent, thickening material, flow agent or the like.Though the amount that some auxiliary agents adds is not high, its high surface and high absorption property at liquid-gas interface allow the bubble in operating process (stir, grind, construction) play stable effect with regular meeting.Traditional physical method is very limited for the elimination of defoamer or the ability of inhibition, and majority only can see through chemical process and carry out froth breaking, and is wherein common and extensive with the use of defoamer again.
In the numerous research of defoamer, shown and used tradition oil droplet type incompatible single composition thing or composite to have relatively poor effect.Because of it mainly sees through a drop kenel, be introduced into the surface of film, form oily minute surface then, further make the attenuation of liquid film water layer afterwards again, then oily minute surface is shaped at another side, and becomes the bridge formation of oil droplet.This bridge formation is unsettled, is subjected to the capillary force effect and retreats the moistening vacuolar membrane that causes and do not have pulling force, and make it to break.Oil droplet may be subjected to the emulsification of the shearing force of operating process and other auxiliary agents and dissemination and its particle is diminished around here, causes its antifoam performance to reduce.This is the secret worry in essence of this kind defoamer.
Typical vacuolar membrane thickness is about the 0.01-1 micron, and diplomatic studies show that when the froth breaking composition is with 5-40 micron size in the froth breaking mechanism can reach the effect of the best at aforesaid froth breaking process mechanism.See through design and its defoaming effect of froth breaking particle person is arranged far beyond in only good with the defoaming effect of traditional fluid dispersion.It is good that it has the deformation of being difficult for, anti-shearing action, long-acting persistence, comprehensive effects such as broken bubble speed is fast, suds suppressing properties excellence.But, then have its corresponding adverse effect if the deisgn product particle is excessive.The depression that formation is filmed, product easily have the effect (precipitation) of layering inequality.Therefore making this defoamer is an important topic in the control of granularity.
Can the easy diffustivity of froth breaking composition and distribution capability arrive near the vacuolar membrane immediately to defoamer, make it to bring into play its effect and also want in very.
The defoamer liquid film surface of wanting to reach the essential rapid osmotic of froth breaking effect and spreading to bubble in addition, therefore on physical and chemical performance, by ROSS permeate and scatter coefficent on need be on the occasion of.
Infiltrate coefficient E=T
F+ T
INT-T
D＞0
Scatter coefficent S=T
F-T
INT-T
D＞0
Wherein: T
F=foaming coating surface tension force
T
INTInterfacial tension between=coating/defoamer
T
DThe surface tension of=defoamer
But since defoamer form working substance many with ultra-low surface tension or super non-polar material for the most effective.As the silicon cave, modified silicon oil or acrylate copolymer or fluosilicic modified acrylic polymer etc.They have quite low surface tension, the inconsistent situation of aggegation very easily takes place in water, and then produce defective.Therefore, see through suitable dispersible carrier its homogeneous is scattered in wherein, allow the froth breaking working substance it can be arrived on the border of bubble fast by distribution good between carrier and water and infiltration.Certainly, perfectly supporting with the corresponding combination of aforementioned froth breaking particle with defoamer is had in the froth breaking mechanism of being derived, reach maximum defoaming effect, make its side effect reduce to state.
This is for having more long-drawn-out different performance for solving coating in recent years on froth breaking, the main development that improve antifoam performance, reduces its side effect towards.Contain suitable froth breaking particle, low polarity froth breaking material, suitably infiltration and the distribution effect etc. of carrier are the important development problem of a new generation's efficient event liquid compound defoamer, having only has complete supportingly on technology and prescription, just can reach better froth breaking usefulness and low its side effect effect.
Summary of the invention
Water-borne coatings if not containing froth breaking particle person easily in use is subjected to shearing action and makes it to diminish, and loses the best efficiency of its froth breaking with defoamer; The froth breaking composition thing of low polarity can't make then that shrinking back of froth breaking process is moistening a good result; Do not have appropriate carriers will make it can't rapid osmotic and intersperse among between system, and easily cause the serious bad outward appearance of paint film.Purpose of the present invention proposes a kind of efficient compound water-borne coatings defoamer for overcoming this problem exactly.
Of the present invention in order to make the compound water-based defoamer of efficient solid-liquid, the basic comprising thing should comprise carrier substance, froth breaking particle at least, reach low polarity froth breaking constituent.Wherein, carrier substance can be oil, glycerine, PO/EO multipolymer etc.: Glycerine, Glycol class, PPG, the suitable polymerization length of PEG, PO/EO; Pimelinketone, BCS or similar solvent of ether ester type, general solvents such as aliphatics/cyclic hydrocarbon carbon compound (Chinese mugwort rope shell series product), isopropylcarbinol, N-BUTYL ACETATE, dimethylbenzene and water etc.The froth breaking particle can be tools such as amides polymer or other wax classes, organic upgrading silicon-dioxide, polyacrylic ester, soap compounds and is not compatible with the apolar substance of water, and is solid matter at normal temperatures, essential can heatproof 70 to 170 degree between.Low polarity froth breaking constituent mostly is silicon cave (viscosity 100 is to thousands of or higher centipoise), modified side chain or straight chain modified silicon oil, wherein have with the polar-modified of oxyethylene group (ethylene oxide) or the nonpolar modification of the third oxygen alkane (propylene oxide), can select for use viscosity not wait to thousands of centipoises by 100 according to broken bubble power demand, the ratio of modifier and dimethyl siloxane can be by 1/2 to 2/3.Also can be acrylate copolymer or fluosilicic modified acrylic polymer etc., is preferable between molecular weight ranges should be 6000～60,000.Its surface tension preferably can be lower than 32mN/m, is desirably better less than 25-20mN/m.
The technology of making can be used top-down or bottom up dual mode, and the former utilizes the high dispersive shearing force to disperse in the solvent that will form the particle coccoid and be scattered in expectation again, makes its particle reach the fineness of dispersion and the distribution of expection.Suitable equipment and technology have, pearl mill or ball milled, high-speed stirring dispersion method, high pressure homogenizer, high speed jet head-on collision method, and other the dispersing apparatus and the technology of high shear forces can be provided.Dispersive speed can be controlled at greater than 8m/s or higher 15m/s, adopts pearl to grind the grinding pearl of glass, zirconium white, steel ball or other tool high hardness wear-resistings of available 0.5-5mm.Adopt the latter, bottom up mode person, then according to the essence and the suitable property of raw material, can adopt the supporting again homogeneous dispersing apparatus of hydrothermal solution cooled and solidified method to reach suitable requirement, the cold true method of hydrothermal solution is mainly used in Wax, generally be with behind the wax heat fusing, again with it cooling in carrier fluid, utilize temperature control to make it to form the size of particles and the distribution of demand.The temperature of hot melt is different according to cured chemical structure and physical nature.Usually can not wait between 130 to 180 degree, it is melted in the aforementioned carrier.The concentration of particle is then different according to the difference of antifoam performance demand and particle usefulness, is about 0.5～5%.The froth breaking size of particles of making is preferably the size of 5-40 micron for best.
Embodiment
Below be embodiment and the comparative example of doing according to the prescription that technical solution of the present invention provides, in order to further explanation the present invention.
Embodiment 1 (top-down method)
Formula rate (weight part)
0.3 part of 383DS (silicon-dioxide)
4,000 24 parts of polypropylene glycols
1 part of silicone oil 100cs
3.5 parts of modified polyorganosiloxanes
1 part in lauryl polyoxyethylene (4) ether
Use the 500ml glass beaker, the configuration high-speed agitator is inserted above-mentioned prescription polypropylene glycol 4000 and silicon-dioxide, disperses with 10 minutes homogeneous of 3000rpm.Add silicone oil 100cs and modified polyorganosiloxane afterwards again, and with 3000rpm homogeneous 5 minutes, adding emulsifying agent again changes with 3000 and disperseed homogeneous 3 minutes.Analyzing fineness, if can use less than 15 microns, if fineness can not re-use the granulated glass sphere of 1mm completely, is under 10m/s disperses in shear line speed, carries out 20 minutes homogeneous micronization, can obtain finished product.
Embodiment 2 (bottom up method)
Formula rate (weight part)
4 parts of chloroflos
5 parts of modified polyorganosiloxanes
1 part in lauryl polyoxyethylene (7) ether
90 parts of #32 white oils
Use the 500ml glass beaker also homogenizer to be set, 40 parts of 5 parts of splendid attire chloroflos and white oils kept 30 minutes after being heated to 140 degree fusions.Starting the stirrer rotating speed is 1000 commentaries on classics, 40 parts of white oils is slowly poured in the wax-white oil liquid of fusion, makes it cooling and precipitation particles, and continues to stir 30 minutes.Add modified polyorganosiloxane and lauryl polyoxyethylene (7) ether and 10 parts of white oils, again through 30 minutes homogeneous, after can the sampling analysis fineness.
Comparative example 1 and 2 prescriptions are with embodiment 1 and 2 but all do not use froth breaking particle, 383DS and chloroflo.Carrying out homogeneous with similar technology disperses.
Table one embodiment and comparative example characteristic are relatively
| Sample | The same day outward appearance | The next day outward appearance | The low temperature outward appearance | The high temperature outward appearance |
| Embodiment 1 | Stable | Stable | Stable | Stable |
| Embodiment 2 | Stable | Stable | Stable | Stable |
| Comparative example 1 | Stable | Layering | Layering | Layering |
| Comparative example 2 | Stable | Layering | Layering | Layering |
Above-mentioned performance test compares, and individual samples has obvious difference at appearance stability, does not contain froth breaking particle person on the product stock stability, and relatively poor state is arranged.
Table two embodiment and comparative example characteristic are relatively
Do not have to add the excellent but important froth breaking of its dispersiveness of froth breaking particle person, appearance of film, press down bubble and bubble test is weakness, weak effect though table two result shows.Be added with froth breaking particle person and obviously put forward usefulness.
Claims (10)
1. the compound water-based coating of efficient solid-liquid is formed and preparation technology with defoamer.
2. according to claim 1, defoamer is formed, and comprises froth breaking particle, froth breaking constituent, the basic three elements of carrier.
3. according to claim 1, the froth breaking particle can be following one or more mixture, diamide polymer or other wax classes, organic upgrading silicon-dioxide, polyacrylic ester, soap compounds etc., can heatproof 70 to 170 degree between.
4. according to claim 1, the froth breaking constituent can be one or more above mixtures of following composition thing, silicon cave (viscosity 100 is to thousands of), modified side chain or straight chain modified silicon oil.
5. according to claim 4, the modified side chain of froth breaking constituent or straight chain modified silicon oil, its modification functional group can be oxyethylene group (ethylene oxide) or third oxyalkyl (propylene oxide) modification, viscosity 100 is to thousands of centipoises, and the ratio of modifier and dimethyl siloxane is 1/2 to 2/3.Molecular weight ranges should be 6000～60, and between 000, surface tension circle is in 20-30mN/m.
6. according to claim 1, carrier can be oil, glycerine, PO/EO multipolymer etc.: Glycerine, Glycol class, PPG, the suitable polymerization length of PEG, PO/EO; Pimelinketone, BCS or similar solvent of ether ester type, general solvents such as aliphatics/cyclic hydrocarbon carbon compound, isopropylcarbinol, N-BUTYL ACETATE, dimethylbenzene and water etc.
7. according to claim 1, the technology of preparation can be used top-down or bottom up dual mode.
8. according to claim 7, the method for top-down can be pearl mill or ball milled, high-speed stirring dispersion method, high pressure homogenizer, high speed jet head-on collision method, and other the dispersing apparatus and the technology of high shear forces can be provided.The dispersive speed control is greater than 8m/s or higher 15m/s,
9. according to claim 7, bottom up method can adopt hydrothermal solution cooled and solidified method, behind the Wax heat fusing, again with it cooling in carrier fluid,
10. according to claim 7, its concentration of particle of preparation technology institute output is required to be 0.5～5%.Size is the 5-40 micron.
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| CN2012100175986A CN103214896A (en) | 2012-01-19 | 2012-01-19 | Efficient solid-liquid composite aqueous coating antifoaming agent composition and preparation technology thereof |
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| CN2012100175986A CN103214896A (en) | 2012-01-19 | 2012-01-19 | Efficient solid-liquid composite aqueous coating antifoaming agent composition and preparation technology thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849286A (en) * | 2022-04-13 | 2022-08-05 | 江苏赛欧信越消泡剂有限公司 | Preparation method of strong-alkali-resistant silicone type silicone grease defoaming agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225456A (en) * | 1978-11-06 | 1980-09-30 | Diamond Shamrock Corporation | Water-in-oil emulsion defoamer compositions, their preparation and use |
| CN1080008A (en) * | 1992-04-27 | 1993-12-29 | 株式会社日光化学研究所 | Oil-in-water type defoaming agent composition and debubbling method thereof |
| CN1751768A (en) * | 2004-09-21 | 2006-03-29 | 日本诺普科助剂有限公司 | Defoamer |
| CN101780383A (en) * | 2009-12-07 | 2010-07-21 | 江苏赛欧信越消泡剂有限公司 | Aqueous emulsion non-silicon defoamer and preparation method thereof |
-
2012
- 2012-01-19 CN CN2012100175986A patent/CN103214896A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225456A (en) * | 1978-11-06 | 1980-09-30 | Diamond Shamrock Corporation | Water-in-oil emulsion defoamer compositions, their preparation and use |
| CN1080008A (en) * | 1992-04-27 | 1993-12-29 | 株式会社日光化学研究所 | Oil-in-water type defoaming agent composition and debubbling method thereof |
| CN1751768A (en) * | 2004-09-21 | 2006-03-29 | 日本诺普科助剂有限公司 | Defoamer |
| CN101780383A (en) * | 2009-12-07 | 2010-07-21 | 江苏赛欧信越消泡剂有限公司 | Aqueous emulsion non-silicon defoamer and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 焦学瞬等: "《消泡剂制备与应用》", 30 June 1996, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849286A (en) * | 2022-04-13 | 2022-08-05 | 江苏赛欧信越消泡剂有限公司 | Preparation method of strong-alkali-resistant silicone type silicone grease defoaming agent |
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Address after: 201613 No. 99 Yang Lian Road, Songjiang Industrial Zone, Shanghai, China Applicant after: Deuchem (Shanghai) Chemical Co., Ltd. Address before: 201613 No. 99 Yang Lian Road, Shanghai, Songjiang District Applicant before: Deuchem (Shanghai) Chemical Co., Ltd. |
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Application publication date: 20130724 |