CN111389056A - Method for improving white carbon black sedimentation problem in mineral oil defoaming agent by using bentonite - Google Patents
Method for improving white carbon black sedimentation problem in mineral oil defoaming agent by using bentonite Download PDFInfo
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- CN111389056A CN111389056A CN202010139377.0A CN202010139377A CN111389056A CN 111389056 A CN111389056 A CN 111389056A CN 202010139377 A CN202010139377 A CN 202010139377A CN 111389056 A CN111389056 A CN 111389056A
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- bentonite
- mineral oil
- carbon black
- white carbon
- dispersion liquid
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 78
- 239000000440 bentonite Substances 0.000 title claims abstract description 78
- 239000002480 mineral oil Substances 0.000 title claims abstract description 65
- 235000010446 mineral oil Nutrition 0.000 title claims abstract description 65
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000006229 carbon black Substances 0.000 title claims abstract description 37
- 239000002518 antifoaming agent Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004062 sedimentation Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 23
- 239000013530 defoamer Substances 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 230000003213 activating effect Effects 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229920002545 silicone oil Polymers 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000003995 emulsifying agent Substances 0.000 claims description 4
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 3
- 229920000053 polysorbate 80 Polymers 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 9
- 238000003860 storage Methods 0.000 abstract description 7
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 5
- 239000012190 activator Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0413—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing N-atoms
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lubricants (AREA)
Abstract
The invention belongs to the field of defoaming agents, and particularly relates to a method for improving the problem of white carbon black sedimentation in a mineral oil defoaming agent by using bentonite. The method comprises the following steps: taking a certain amount of bentonite, uniformly mixing the bentonite in mineral oil, adding a proper amount of activating agent, then stirring the mixture at a high speed for a period of time to prepare high-viscosity bentonite pre-dispersion liquid, and adding the high-viscosity bentonite pre-dispersion liquid into the mineral oil defoaming agent to be uniformly stirred. The bentonite pre-dispersion liquid prepared by the invention is added into the mineral oil defoamer, can obviously improve the sedimentation problem of white carbon black in the defoamer, improves the storage stability of the mineral oil defoamer, and has the advantages of low cost, simple operation and easy industrial production.
Description
Technical Field
The invention belongs to the field of defoaming agents, and particularly relates to a method for improving the problem of white carbon black sedimentation in a mineral oil defoaming agent by using bentonite.
Background
Mineral oil defoamers are an important class of defoamer branches that are widely used in inks, coatings and aqueous systems. The mineral oil defoaming agent mainly comprises a solvent, hydrophobic particles, an emulsifier, other hydrophobic substances and the like. The white carbon black is a common hydrophobic particle, has extremely strong defoaming performance, can greatly enhance the defoaming performance of a system, but has small particle size and large specific surface area, and can be continuously aggregated and settled in mineral oil, so that the whole mineral oil defoaming agent system is unstable, and white carbon black can be slowly separated out.
From the literature data at present, there are two methods for improving the sedimentation problem of white carbon black in mineral oil defoaming agent, the first method is to chemically modify white carbon black, graft the white carbon black on the surface of white carbon black with silane coupling agent, hydroxyl silicone oil, long-chain alkyl silicone oil and the like, and increase white carbon black and solventCompatibility and surface steric hindrance of the white carbon black. Zhang Jinlong in research paper "fluorine modified nano SiO2The preparation method is adopted in the preparation of the particles and the application thereof in the defoaming agent (35, 2013 (3): 107-111, university of Nanjing university of industry). The second is to adopt a physical method, with the help of stronger shearing force or impact force, to uniformly and stably disperse the white carbon black in the defoaming agent system, and simultaneously to increase the viscosity of the system and properly prolong the storage time. The congratulatory rhyme is the method adopted in 'modification of soybean oil and application in antifoaming agent' (master academic thesis, 2011, university of Nanjing forestry).
The first method has the defects of low chemical modification efficiency of the white carbon black, high cost and long period; the second method has short storage period and cannot fundamentally solve the problem of the sedimentation of the white carbon black.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention aims to provide a method for improving the sedimentation problem of white carbon black in a mineral oil defoaming agent by using bentonite, and the method can obviously improve the sedimentation problem of white carbon black in the defoaming agent and improve the storage stability of the mineral oil defoaming agent.
The bentonite particles are dispersed into a plurality of layered bentonite flakes under the shearing action, the high-speed stirring is continued after the activator is added, the layered bentonite flakes are further dispersed, and the hydroxyl contained in the activator can provide hydrogen bonds for the bentonite flakes to bridge in the mineral oil, so that the bentonite forms a stable three-dimensional network structure in the mineral oil. The mineral oil and the white carbon black are uniformly filled in the three-dimensional network structures, so that the aggregation and sedimentation of the white carbon black are prevented, and the viscosity of the whole system is improved. Bentonite is also added to the mineral oil defoamer prepared in chinese patent CN107200503A, which does not describe the effect in bentonite mineral oil defoamers. The thickening thixotropic effect of the activated organic bentonite in a mineral oil system is utilized to explain the anti-settling mechanism and the adding method of the bentonite in detail.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for improving the white carbon black sedimentation problem in a mineral oil defoaming agent by using bentonite comprises the following steps: uniformly mixing bentonite and mineral oil, adding an activating agent, stirring for 5-15 min at the rotating speed of 14600-22000 rpm by using a homogenizer with the rotating head of which the outer diameter is 18mm to prepare high-viscosity bentonite pre-dispersion liquid, and finally, uniformly mixing and stirring the bentonite pre-dispersion liquid and a mineral oil defoaming agent according to the mass ratio of 1: 9-1: 4;
the bentonite is organic bentonite, the organic bentonite is suitable for aliphatic and nonpolar solvent systems, and can be well dispersed in mineral oil, the type of the organic bentonite is, for example, Haimines organic bentonite Bentone34 or BentoneSD-1, and the addition amount of the organic bentonite Bentone34 or BentoneSD-1 accounts for 4-12% of the mass of the bentonite pre-dispersion liquid;
the mineral oil is one or more than two of No. 15, No. 26, No. 32 and No. 68 white mineral oil, and the addition amount accounts for 88-96% of the mass of the bentonite pre-dispersion liquid;
the activating agent is methanol/water (mass ratio: 95/5), ethanol/water (mass ratio: 95/5) or acetone/water (mass ratio: 95/5), and the adding amount is 10-60% of the mass of the bentonite.
Preferably, the mineral oil defoamer comprises the following components in parts by weight: 79 parts of 226 # white mineral oil, 2 parts of white carbon black HB139, 9 parts of long-chain alkyl silicone oil, 6 parts of composite emulsifier (Span80/Tween80 mass ratio is 5/1) and 4 parts of PPG800, all the components are mixed and added into a reaction kettle, and the mixture is stirred for 15min at 110 ℃ to prepare the mineral oil defoaming agent.
Preferably, the addition amount of the bentonite accounts for 5-10% of the mass of the bentonite pre-dispersion liquid.
Preferably, the addition amount of the mineral oil accounts for 90-95% of the mass of the bentonite predispersion.
Preferably, the addition amount of the activating agent is 20-40% of the mass of the bentonite.
Compared with the prior art, the invention has the following beneficial effects:
the thickening thixotropic effect of the activated organic bentonite in a mineral oil system is utilized, the storage stability of the mineral oil defoamer is obviously improved, the white carbon black is prevented from settling, and the method is simple to operate, low in cost and beneficial to industrial production.
Drawings
FIG. 1 is a graph showing the anti-settling mechanism of the mineral oil defoamer of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, but the embodiments of the present invention are not limited thereto. For process parameters not specifically noted, reference may be made to conventional techniques.
The mineral oil defoamer used in the following examples was comprised of the following components in parts by weight: 79 parts of 226 # white mineral oil, 2 parts of white carbon black HB139, 9 parts of long-chain alkyl silicone oil, 6 parts of composite emulsifier (Span80/Tween80 mass ratio is 5/1) and 4 parts of PPG800, all the components are mixed and added into a reaction kettle, and the mixture is stirred for 15min at 110 ℃ to prepare the mineral oil defoaming agent.
Example 1
The embodiment provides a method for improving the white carbon black sedimentation problem in a mineral oil defoaming agent by using bentonite, which comprises the following steps:
taking 5g of Benton SD-1 bentonite, uniformly mixing the Benton SD-1 bentonite in 95g of No. 32 white mineral oil, adding 1g of methanol/water (95/5) activating agent, stirring the mixture for 5min at the rotating speed of 14600rpm by using a homogenizer to prepare high-viscosity bentonite pre-dispersion liquid, and adding 20g of the bentonite pre-dispersion liquid into 80g of mineral oil defoamer and uniformly stirring the mixture.
Example 2
The embodiment provides a method for improving the white carbon black sedimentation problem in a mineral oil defoaming agent by using bentonite, which comprises the following steps:
taking 5g of Bentone34 bentonite, uniformly mixing the Bentone34 bentonite in 95g of No. 26 white mineral oil, adding 2g of methanol/water (95/5) activating agent, stirring the mixture for 5min at the rotation speed of 18000rpm by using a homogenizer to prepare high-viscosity bentonite pre-dispersion liquid, taking 20g of the bentonite pre-dispersion liquid, adding the bentonite pre-dispersion liquid into 80g of mineral oil defoamer, and uniformly stirring the mixture.
Example 3
The embodiment provides a method for improving the white carbon black sedimentation problem in a mineral oil defoaming agent by using bentonite, which comprises the following steps:
taking 5g of Benton SD-1 bentonite, uniformly mixing the Benton SD-1 bentonite in 15g of No. 15 white mineral oil and 70g of No. 68 white mineral oil, adding 1g of ethanol/water (95/5) activating agent, stirring for 5min at the rotating speed of 22000rpm by using a homogenizer to prepare high-viscosity bentonite pre-dispersion liquid, and adding 20g of the bentonite pre-dispersion liquid into 80g of mineral oil defoamer and uniformly stirring.
Example 4
The embodiment provides a method for improving the white carbon black sedimentation problem in a mineral oil defoaming agent by using bentonite, which comprises the following steps:
taking 10g of Bentone34 bentonite, uniformly mixing the Bentone34 bentonite in 90g of No. 26 white mineral oil, adding 4g of methanol/water (95/5) activating agent, stirring the mixture for 5min at the rotating speed of 22000rpm by using a homogenizer to prepare high-viscosity bentonite pre-dispersion liquid, taking 10g of the bentonite pre-dispersion liquid, adding the bentonite pre-dispersion liquid into 90g of mineral oil defoamer, and uniformly stirring the mixture.
Comparative example 1
In example 1, no bentonite predispersion was added, and a mineral oil defoamer was used alone.
Comparative example 2
In example 1, no methanol/water (95/5) activator was added, the rest being the same.
The final mineral oil defoamer was measured for viscosity with a digital viscometer NDJ-5S at 37 ℃. And an appropriate amount of the mineral oil antifoaming agent in the above example is put into a beaker, placed at room temperature, observed for sedimentation, and recorded for the time when the white carbon black is settled, with the results shown in the attached table 1.
As can be seen from the attached Table 1, the white carbon black precipitation occurs after the comparative example 1 without adding bentonite is placed for 3 days, while the storage time can be obviously prolonged by adding bentonite, and the storage time is positively correlated with the viscosity of the defoaming agent. The addition amount of the activating agent is 20-30% of the mass of the white carbon black, and the best tackifying effect can be achieved when the stirring speed of the homogenizer is 16000-22000 rpm.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. A method for improving the white carbon black sedimentation problem in a mineral oil defoaming agent by using bentonite is characterized by comprising the following steps: uniformly mixing bentonite and mineral oil, adding an activating agent, stirring for 5-15 min at the rotating speed of 14600-22000 rpm by using a homogenizer with the rotating head of which the outer diameter is 18mm to prepare high-viscosity bentonite pre-dispersion liquid, and finally, uniformly mixing and stirring the bentonite pre-dispersion liquid and a mineral oil defoaming agent according to the mass ratio of 1: 9-1: 4.
The bentonite is organic bentonite, specifically Bentone34 or Bentone SD-1 of Haiming organic bentonite, and the addition amount accounts for 4-12% of the mass of the bentonite pre-dispersion liquid;
the mineral oil is one or more than two of No. 15, No. 26, No. 32 and No. 68 white mineral oil, and the addition amount accounts for 88-96% of the mass of the bentonite pre-dispersion liquid;
the activating agent is methanol/water with the mass ratio of 95/5, ethanol/water with the mass ratio of 95/5 or acetone/water with the mass ratio of 95/5, and the adding amount is 10-60% of the mass of the bentonite.
2. The method of using bentonite clay to improve white carbon black settling problems in mineral oil defoamers of claim 1, wherein: the addition amount of the bentonite accounts for 5-10% of the mass of the bentonite pre-dispersion liquid.
3. The method of using bentonite clay to improve white carbon black settling problems in mineral oil defoamers of claim 2, wherein: the addition amount of the mineral oil accounts for 90-95% of the mass of the bentonite predispersion liquid.
4. The method of using bentonite clay to improve white carbon black settling problems in mineral oil defoamers of claim 3, wherein: the addition amount of the activating agent is 20-40% of the mass of the bentonite.
5. The method for improving the white carbon black sedimentation problem in the mineral oil defoamer according to claim 4, wherein the mineral oil defoamer is prepared by stirring the following components in parts by weight at 110 ℃ for 15 min: 79 parts of No. 26 white mineral oil, 2 parts of white carbon black HB139, 9 parts of long-chain alkyl silicone oil, 6 parts of a composite emulsifier consisting of Span80 and Tween80 according to the mass ratio of 5/1 and 4 parts of PPG 800.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010139377.0A CN111389056B (en) | 2020-03-03 | 2020-03-03 | Method for improving white carbon black sedimentation problem in mineral oil defoaming agent by using bentonite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010139377.0A CN111389056B (en) | 2020-03-03 | 2020-03-03 | Method for improving white carbon black sedimentation problem in mineral oil defoaming agent by using bentonite |
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| CN111389056A true CN111389056A (en) | 2020-07-10 |
| CN111389056B CN111389056B (en) | 2021-06-08 |
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| CN202010139377.0A Expired - Fee Related CN111389056B (en) | 2020-03-03 | 2020-03-03 | Method for improving white carbon black sedimentation problem in mineral oil defoaming agent by using bentonite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930109A (en) * | 2021-09-22 | 2022-01-14 | 江苏澳瑞智能家居有限公司 | Bi-component water-based wood paint and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4008173A (en) * | 1972-09-15 | 1977-02-15 | Philadelphia Quartz Company | Defoamer composition |
| US4344858A (en) * | 1977-03-23 | 1982-08-17 | Kalcor Coatings Company, Inc. | Anti-foaming compositions |
| CN102120108A (en) * | 2010-11-19 | 2011-07-13 | 苏州博纳化学科技有限公司 | Method for preparing mineral oil defoamer |
| CN106362443A (en) * | 2016-11-01 | 2017-02-01 | 合肥新万成环保科技有限公司 | Organic silicon defoaming agent with anti-cracking function |
| CN107177351A (en) * | 2017-06-30 | 2017-09-19 | 四川宏升石油技术开发有限责任公司 | A kind of preparation method of defoamer easy to use |
-
2020
- 2020-03-03 CN CN202010139377.0A patent/CN111389056B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4008173A (en) * | 1972-09-15 | 1977-02-15 | Philadelphia Quartz Company | Defoamer composition |
| US4344858A (en) * | 1977-03-23 | 1982-08-17 | Kalcor Coatings Company, Inc. | Anti-foaming compositions |
| CN102120108A (en) * | 2010-11-19 | 2011-07-13 | 苏州博纳化学科技有限公司 | Method for preparing mineral oil defoamer |
| CN106362443A (en) * | 2016-11-01 | 2017-02-01 | 合肥新万成环保科技有限公司 | Organic silicon defoaming agent with anti-cracking function |
| CN107177351A (en) * | 2017-06-30 | 2017-09-19 | 四川宏升石油技术开发有限责任公司 | A kind of preparation method of defoamer easy to use |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930109A (en) * | 2021-09-22 | 2022-01-14 | 江苏澳瑞智能家居有限公司 | Bi-component water-based wood paint and preparation method thereof |
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