CN112126935B - Low-temperature adaptive degreasing agent - Google Patents

Low-temperature adaptive degreasing agent Download PDF

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CN112126935B
CN112126935B CN202010726532.9A CN202010726532A CN112126935B CN 112126935 B CN112126935 B CN 112126935B CN 202010726532 A CN202010726532 A CN 202010726532A CN 112126935 B CN112126935 B CN 112126935B
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sodium
fatty alcohol
degreasing
agent
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CN112126935A (en
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李国栋
陈高山
庄海涛
庄旭东
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Shanghai Baoju Surface Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions

Abstract

The application relates to a low-temperature adaptive degreasing agent which comprises the following components in parts by weight: 0.1-0.6 part of sodium dodecyl diphenyl ether disulfonate, 0.1-0.4 part of sodium diisooctyl succinate sulfonate, 1-5 parts of fatty alcohol-polyoxyethylene ether, 0.5-3 parts of isomeric fatty alcohol alkoxylate, 1-3 parts of fatty alcohol-alkylene oxide copolymer, 0.5-2.5 parts of phenyl polyethylene oxide phosphate, 70-80 parts of 30% sodium hydroxide aqueous solution, 1-6 parts of alkyl substituted dicarboxylic acid salt, 1-3 parts of sodium gluconate, 0.5-3 parts of defoaming agent, 0.1-1.2 parts of cosolvent and 10-15 parts of water. The present application has the effect of reducing foaming and improving low temperature degreasing properties.

Description

Low-temperature adaptive degreasing agent
Technical Field
The application relates to the field of metal material surface cleaning agents, in particular to a low-temperature adaptive degreasing agent.
Background
Before the steps of hot galvanizing, continuous annealing, coating and the like are carried out on the surface of the strip steel, impurity oil stains on the surface of the strip steel must be removed firstly to ensure the quality of the final product.
The alkaline degreasing agent generally comprises alkali, a surfactant, a chelating agent and an additive, wherein the alkali can saponify, emulsify and disperse the grease and disperse the mineral oil; the surface tension of the alkali liquor is reduced under the action of the surfactant, the alkali liquor can be quickly soaked on the surface of the steel plate to peel off dirt, and the dirt can be emulsified and dispersed in the alkali liquor to avoid secondary pollution caused by deposition on the surface of a metal material; the chelating agent can combine with calcium and magnesium ions good horse to soften hard water and promote emulsification and dispersion with alkali and surfactant.
In the degreasing process, due to the action of the surfactant, more foams are generated to influence the degreasing effect, and when the using temperature is lower, the viscosity of the degreasing agent composition is increased, so that the degreasing agent composition is difficult to uniformly and effectively cover the surface of the rolled steel galvanized plate to degrease the rolled steel galvanized plate, therefore, the high environmental temperature needs to be increased in links of storage, use of the degreasing agent and the like in a low-temperature environment, and the production cost is increased.
In the related art described above, the inventors have considered that there is a defect that foaming affects the degreasing effect and the low-temperature degreasing effect is poor.
Disclosure of Invention
In order to reduce foaming and improve low-temperature degreasing effect, the application provides a low-temperature adaptive degreasing agent.
The application provides a low temperature adaptability degreaser adopts following technical scheme:
the low-temperature adaptive degreasing agent comprises the following components in parts by weight: 0.1-0.6 part of sodium dodecyl diphenyl ether disulfonate, 0.1-0.4 part of sodium diisooctyl succinate sulfonate, 1-5 parts of fatty alcohol-polyoxyethylene ether, 0.5-3 parts of isomeric fatty alcohol alkoxylate, 1-3 parts of fatty alcohol-alkylene oxide copolymer, 0.5-2.5 parts of phenyl polyethylene oxide phosphate, 70-80 parts of 30% sodium hydroxide aqueous solution, 1-6 parts of alkyl substituted dicarboxylic acid salt, 1-3 parts of sodium gluconate, 0.5-3 parts of defoaming agent, 0.1-1.2 parts of cosolvent and 10-15 parts of water.
By adopting the technical scheme, the surfactant is prepared by compounding an anionic surfactant and a nonionic surfactant; the sodium dodecyl diphenyl ether disulfonate and the fatty alcohol-polyoxyethylene ether are anionic surfactants, the sodium dodecyl diphenyl ether disulfonate is excellent in low-temperature water solubility, few in bubbles, quick in defoaming, poor in foam stability of the fatty alcohol-polyoxyethylene ether, excellent in defoaming speed and good in permeability, and the sodium dodecyl diphenyl ether disulfonate and the fatty alcohol-polyoxyethylene ether are compounded, so that the total bubbles are few and quick in defoaming;
the fatty alcohol-polyoxyethylene ether, the fatty alcohol-alkylene oxide copolymer, the isomeric fatty alcohol alkoxylate and the phenyl polyethylene oxide phosphate are nonionic surfactants, the fatty alcohol-polyoxyethylene ether and the anionic surfactant have a synergistic effect, the hard water resistance is good, the detergent has good detergency and dirt dispersing ability at low concentration, and the emulsifying effect is good; the fatty alcohol-alkylene oxide copolymer has excellent hard surface wettability and permeability and certain foam inhibition performance; the heterogeneous fatty alcohol alkoxylate has strong oil removal capability, low foam characteristic, good low-temperature fluidity and dispersion capability; the phenyl polyethylene oxide phosphate has good low-foaming performance and better solubilization effect;
the compounding of the surfactants generates little foam, the defoaming is quick, the permeability is strong, the grease can permeate into and separate the grease from the metal surface, the grease is separated from the metal surface, and the grease separated from the metal surface can be further emulsified by the surfactants and well dispersed into water, so that the effective dispersion and the stability of dirt are realized; the detergent can keep sufficient fluidity at minus 5 ℃, and can effectively cover the surface to be cleaned, so that the detergent does not need to be additionally heated in winter, better low-temperature degreasing performance is generated, and energy is saved;
the sodium hydroxide keeps the alkaline environment of the degreasing agent, can improve the cleaning capacity of the surfactant on oil stains, and is beneficial to emulsification and dispersion of the oil stains;
the alkyl-substituted dicarboxylic acid salt has good constraint capacity on calcium ions and magnesium ions in water, prevents metal ions such as the calcium ions and the magnesium ions from generating water-insoluble salt with a surfactant, is favorable for improving the degreasing capacity of the degreasing agent, and can reduce the surface tension of the degreasing agent, so that the degreasing agent has stronger wetting capacity on the metal surface, and is favorable for further improving the degreasing effect; meanwhile, the pH buffering capacity of the alkyl-substituted dicarboxylic acid salt is strong, and the pH value can be kept for a long time by matching with sodium hydroxide; the sodium gluconate has certain complexing ability to metals and impurities in water, can better prevent metal ions such as calcium ions, magnesium ions and the like from generating water-insoluble salt with a surfactant by compounding with the alkyl substituted dicarboxylic acid salt, is favorable for improving the degreasing ability of the degreasing agent, also has certain buffering ability and is favorable for maintaining the pH value of the degreasing agent.
Preferably, the degreasing agent comprises the following components in parts by weight: 0.3-0.5 part of sodium dodecyl diphenyl ether disulfonate, 0.1-0.4 part of sodium diisooctyl succinate sulfonate, 3-4 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of isomeric fatty alcohol alkoxylate, 1.5-2.5 parts of fatty alcohol-alkylene oxide copolymer, 1.5-2.5 parts of phenyl polyethylene oxide phosphate, 70-80 parts of 30% sodium hydroxide aqueous solution, 3-4 parts of alkyl substituted dicarboxylic acid salt, 1-3 parts of sodium gluconate, 0.5-3 parts of defoaming agent, 0.5-0.9 part of cosolvent and 10-15 parts of water.
Preferably, the degreasing agent further comprises 0.5-2 parts by weight of sodium carbonate.
By adopting the technical scheme, the sodium hydroxide and the sodium carbonate provide an alkaline environment, and the sodium carbonate has buffering capacity and can form a precipitate with calcium ions, so that the sodium carbonate has certain water softening capacity; the solubility of the sodium hydroxide is higher than that of the sodium carbonate at the same temperature, and the proportion ensures that alkaline substances at the temperature of minus 5 ℃ and above can provide a stable alkaline environment.
Preferably, the degreasing agent further comprises 0.5-2 parts by weight of sodium chloride.
By adopting the technical scheme, the sodium chloride can promote the reduction of the critical micelle concentration of the surfactant, promote the formation of micelles and improve the surface activity, and is beneficial to reducing the surface tension of the aqueous solution of the surfactant (sodium dodecyl diphenyl ether disulfonate, sodium diisooctyl succinate sulfonate, fatty alcohol polyoxyethylene ether, isomeric fatty alcohol alkoxylate, fatty alcohol-alkylene oxide copolymer and phenyl polyethylene oxide phosphate) and enhancing the oil removing capability of the surfactant; the addition of the sodium chloride greatly reduces the freezing point of the degreasing agent, so that the degreasing agent can keep good fluidity at a lower temperature; the sodium chloride is also beneficial to increasing the viscosity of the degreasing agent, so that the degreasing agent has dispersing and stabilizing effects on dirt, and can prevent the dirt from redepositing on the surface; the sodium chloride is compounded with sodium dodecyl diphenyl ether disulfonate and sodium diisooctyl succinate sulfonate, so that the permeability of the sodium dodecyl diphenyl ether disulfonate is increased.
Preferably, the defoaming agent is a polyether defoaming agent.
Preferably, the polyether defoamer comprises a polyether defoamer and a polyether defoamer in a weight ratio of 1: (0.3-0.7) GPES type defoaming agent and GP type defoaming agent.
By adopting the technical scheme, the two ends of the GPES defoaming agent are hydrophobic, namely stearate seal heads, so that a block copolymer with hydrophobic chains and hydrophilic chains at the middle at the two ends is formed, the block copolymer is easy to lie on a gas-liquid interface, and the defoaming efficiency is higher; the GP type defoaming agent has low solubility in water, but can be well dissolved in the degreasing agent by compounding with other surfactants in the degreasing agent, and the GP type defoaming agent has good foam inhibition performance, and is beneficial to foam breaking and defoaming at high temperature and foam inhibition at low temperature generally, so that the complex formulation of the GP type defoaming agent and the degreasing agent ensures that the degreasing agent has good low foaming property in the whole range from low temperature of minus 5 ℃ to minus 40 ℃ to high temperature.
Preferably, the cosolvent is ethylene glycol.
By adopting the technical scheme, the glycol and water form the low-concentration glycol/water mixed polar solvent, so that the surfactant is more easily dissolved in the glycol/water mixed polar solvent, and the fluidity of the degreasing agent at low temperature is enhanced.
Preferably, the degreasing agent further comprises 2-3 parts of isomeric decaalcohol polyether by weight.
By adopting the technical scheme, the isomeric decaalcohol polyether has better fluidity at low temperature, and is compounded with other surfactants, so that the low-temperature degreasing effect of the degreasing agent is further improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the degreasing agent can keep sufficient fluidity at minus 5 ℃ by compounding various surfactants, and can effectively cover the surface to be cleaned, so that the degreasing agent does not need to be additionally heated in winter, better low-temperature degreasing property is generated, and energy is saved;
2. through reasonable selection of the surface or the camera and compounding with the defoaming agent, the degreasing agent has less foaming and can be defoamed quickly;
3. the cosolvent is arranged, so that the fluidity of the degreasing agent at low temperature is enhanced.
Detailed Description
The present application is described in further detail in conjunction with the following.
Sodium dodecyl diphenyl ether disulfonate of DOWFAX 2A1 type, manufactured by Dow of Dow USA;
sodium diisooctyl succinate sulfonate type OT-75, Hensman from the manufacturer;
the fatty alcohol-polyoxyethylene ether is AEO-9, and the manufacturer is a Japanese catalyst;
the fatty alcohol-alkylene oxide copolymer type is TERIC 168, manufactured by BASF;
the model of the isomeric fatty alcohol alkoxylate is EH-6, and the manufacturer is Dow of Dow USA;
phenyl polyethylene oxide phosphate type PPE 1040K, manufactured by lakeland, UK;
sodium carbonate, the manufacturer is solvay;
the type of the alkyl substituted dicarboxylic acid salt is DG-V, and the manufacturer is Hangzhou German chemical engineering development company Limited;
sodium chloride, the manufacturer is three sodium bicarbonate limited company of lake south sea;
GPES type defoamer, manufactured by Dow, USA;
GP type defoaming agent is GP330, and the manufacturer is a Haian petrochemical plant of Jiangsu province;
the isomeric decaalcohol polyether is KL-E1003, and the manufacturer is Liaoning Colon fine chemical industry Co., Ltd;
sodium hydroxide aqueous solution, the manufacturer is Shanghai chlor-alkali;
the sodium gluconate is produced by Zhejiang Tiantian food additive Co.
Example 1
The low-temperature adaptive degreasing agent comprises 0.1kg of sodium dodecyl diphenyl ether disulfonate, 0.4kg of sodium diisooctyl succinate sulfonate, 1kg of fatty alcohol-polyoxyethylene ether, 3kg of isomeric fatty alcohol alkoxylate, 1kg of fatty alcohol-alkylene oxide copolymer, 2.5kg of phenyl polyethylene oxide phosphate, 70kg of 30% sodium hydroxide aqueous solution, 6kg of alkyl substituted dicarboxylic acid salt, 1kg of sodium gluconate, 3kg of defoaming agent, 0.1kg of cosolvent and 15kg of water.
The defoaming agent comprises the following components in percentage by weight of 1: 0.5 of GPES type defoaming agent and GP type defoaming agent.
The cosolvent is ethylene glycol.
Example 2
The difference from example 1 is that: a low-temperature adaptive degreasing agent comprises 0.3kg of sodium dodecyl diphenyl ether disulfonate, 0.4kg of sodium diisooctyl succinate sulfonate, 3kg of fatty alcohol-polyoxyethylene ether, 3kg of isomeric fatty alcohol alkoxylate, 1.5kg of fatty alcohol-alkylene oxide copolymer, 2.5kg of phenyl polyethylene oxide phosphate, 70kg of 30% sodium hydroxide aqueous solution, 4kg of alkyl substituted dicarboxylic acid salt, 1kg of sodium gluconate, 3kg of defoaming agent, 0.5kg of cosolvent and 15kg of water.
Example 3
The difference from example 1 is that: the low-temperature adaptive degreasing agent comprises 0.4kg of sodium dodecyl diphenyl ether disulfonate, 0.3kg of sodium diisooctyl succinate sulfonate, 3.5kg of fatty alcohol-polyoxyethylene ether, 2kg of isomeric fatty alcohol alkoxylate, 2kg of fatty alcohol-alkylene oxide copolymer, 2kg of phenyl polyethylene oxide phosphate, 75kg of 30% sodium hydroxide aqueous solution, 3.5kg of alkyl substituted dicarboxylic acid salt, 2kg of sodium gluconate, 2.5kg of defoaming agent, 0.7kg of cosolvent and 14kg of water.
Example 4
The difference from example 1 is that: a low-temperature adaptive degreasing agent comprises 0.5kg of sodium dodecyl diphenyl ether disulfonate, 0.1kg of sodium diisooctyl succinate sulfonate, 4kg of fatty alcohol-polyoxyethylene ether, 1kg of isomeric fatty alcohol alkoxylate, 2.5kg of fatty alcohol-alkylene oxide copolymer, 1.5kg of phenyl polyethylene oxide phosphate, 80kg of 30% sodium hydroxide aqueous solution, 3kg of alkyl substituted dicarboxylic acid salt, 3kg of sodium gluconate, 0.5kg of defoaming agent, 0.9kg of cosolvent and 10kg of water.
Example 5
The difference from example 1 is that: a low-temperature adaptive degreasing agent comprises 0.6kg of sodium dodecyl diphenyl ether disulfonate, 0.1kg of sodium diisooctyl succinate sulfonate, 5kg of fatty alcohol polyoxyethylene ether, 0.5kg of isomeric fatty alcohol alkoxylate, 3kg of fatty alcohol-alkylene oxide copolymer, 0.5kg of isooctanol polyoxyethylene ether, 80kg of 30% sodium hydroxide aqueous solution, 1kg of alkyl substituted dicarboxylic acid salt, 3kg of sodium gluconate, 0.5kg of defoaming agent, 1.2kg of cosolvent and 10kg of water.
Example 6
The difference from example 3 is that: also comprises 0.5kg of sodium carbonate.
Example 7
The difference from example 3 is that: also comprises 1.5kg of sodium carbonate.
Example 8
The difference from example 3 is that: also comprises 2kg of sodium carbonate.
Example 9
The difference from example 7 is that: the defoaming agent comprises the following components in percentage by weight of 1: 0.3 of GPES type defoaming agent and GP type defoaming agent.
Example 10
The difference from example 7 is that: the defoaming agent comprises the following components in percentage by weight of 1: 0.7 of GPES type defoaming agent and GP type defoaming agent.
Example 11
The difference from example 7 is that: the defoaming agent is an organic silicon defoaming agent, the type of the organic silicon defoaming agent is YT-50B, and the manufacturer is Jinan Tao chemical Co.
Example 12
The difference from example 7 is that: also comprises 0.5kg of sodium chloride.
Example 13
The difference from example 7 is that: also comprises 1.2kg of sodium chloride.
Example 14
The difference from example 7 is that: also comprises 2kg of sodium chloride.
Example 15
The difference from example 7 is that: the degreasing agent also comprises 2kg of isomeric decaalcohol polyether.
Example 16
The difference from example 7 is that: the degreasing agent also comprises 2.5kg of isomeric decaalcohol polyether.
Example 17
The difference from example 7 is that: the degreasing agent also comprises 3kg of isomeric decaalcohol polyether.
Comparative example 1
The low-foam steel degreasing and degreasing agent sold in the market is LF-102, and the manufacturer is Wenzhou Longfei environmental protection science and technology Limited company.
Comparative example 2
The difference from example 16 is that: sodium diisooctyl succinate sulfonate was replaced with the same weight of sodium dodecyl diphenyl ether disulfonate.
Comparative example 3
The difference from example 16 is that: the isomeric fatty alcohol alkoxylates are replaced by fatty alcohol polyoxyethylene ethers of the same weight.
Comparative example 4
The difference from example 16 is that: the fatty alcohol-alkylene oxide copolymer was replaced with the same weight of fatty alcohol-polyoxyethylene ether.
Comparative example 5
The difference from example 16 is that: the phenyl polyoxyethylene phosphate is replaced by fatty alcohol polyoxyethylene ether with the same weight.
Performance detection
The degreasers of examples 1 to 16 and comparative examples 1 to 5 were subjected to a cleaning ability test and a defoaming property test at-5 ℃, 5 ℃ and 25 ℃ respectively in accordance with JB T4323.2-1999 Experimental method for Water-based Metal cleaners; the larger the oil washing rate (%) is, the higher the degreasing rate of the degreasing agent is; the smaller the residual foam height (mm), the better the defoaming property, and the results of the measurement are shown in Table 1.
TABLE 1 Performance test results
Figure BDA0002601952450000101
Figure BDA0002601952450000111
As can be seen from Table 1, examples 1 to 17 are superior to comparative example 1 in both degreasing effect and defoaming property, and show that the defoaming property and degreasing property at low temperature of the degreasing agent of the present application are superior.
In examples 1 to 5, the degreasing effect and defoaming property of example 3 were the most excellent, indicating that the component ratio of example 3 was more excellent.
In examples 3 and 6-8, sodium carbonate is added into the corresponding degreasing agents, so that the degreasing effect of examples 6-8 is better, and the PH of the degreasing agent is probably more stable, which indicates that the degreasing effect is improved by adding sodium carbonate.
In examples 7 and 9-11, the defoaming performance of the degreasing agents of examples 9-11 is better than that of example 7, which shows that the combination of the GPES type defoaming agent and the GP type defoaming agent leads to better defoaming performance of the degreasing agent, the defoaming performance of example 7 is optimal, and the selection and the addition amount of the defoaming agent of example 7 are better.
In examples 7 and 12-14, sodium chloride was added to the degreasers of examples 12-14, the degreasing effect of the degreasers of examples 12-14 was better than that of example 7 at each temperature, and the degreaser of example 13 had better degreasing performance at low temperature, indicating that the addition of example 13 was better.
In examples 13 and 15-17, isomeric decaalcohol polyether is added to the degreasing agents of examples 15-17, so that the degreasing effects of the degreasing agents of examples 15-17 at low temperature are better than those of example 13, the degreasing performance of example 16 at low temperature is optimal, and the addition amount of isomeric decaalcohol polyether in example 16 is better.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (4)

1. A low-temperature adaptive degreasing agent is characterized in that: the degreasing agent comprises the following components in parts by weight: 0.1-0.6 part of sodium dodecyl diphenyl ether disulfonate, 0.1-0.4 part of sodium diisooctyl succinate sulfonate, 1-5 parts of fatty alcohol-polyoxyethylene ether, 0.5-3 parts of isomeric fatty alcohol alkoxylate, 1-3 parts of fatty alcohol-alkylene oxide copolymer, 0.5-2.5 parts of phenyl polyethylene oxide phosphate, 70-80 parts of 30% sodium hydroxide aqueous solution, 1-6 parts of alkyl substituted dicarboxylic acid salt, 1-3 parts of sodium gluconate, 0.5-3 parts of defoaming agent, 0.1-1.2 parts of cosolvent and 10-15 parts of water; the defoaming agent is a polyether defoaming agent, and the polyether defoaming agent comprises the following components in percentage by weight of 1: (0.3-0.7) the GPES type defoaming agent and the GP type defoaming agent; the degreasing agent also comprises 0.5-2 parts by weight of sodium chloride; the degreasing agent also comprises 2-3 parts of isomeric decaalcohol polyether according to parts by weight.
2. The low temperature adaptive degreasing agent as recited in claim 1, wherein: the degreasing agent comprises the following components in parts by weight: 0.3-0.5 part of sodium dodecyl diphenyl ether disulfonate, 0.1-0.4 part of sodium diisooctyl succinate sulfonate, 3-4 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of isomeric fatty alcohol alkoxylate, 1.5-2.5 parts of fatty alcohol-alkylene oxide copolymer, 1.5-2.5 parts of phenyl polyethylene oxide phosphate, 70-80 parts of 30% sodium hydroxide aqueous solution, 3-4 parts of alkyl substituted dicarboxylic acid salt, 1-3 parts of sodium gluconate, 0.5-3 parts of defoaming agent, 0.5-0.9 part of cosolvent and 10-15 parts of water.
3. The low temperature adaptive degreasing agent as recited in claim 1, wherein: the degreasing agent also comprises 0.5-2 parts of sodium carbonate by weight.
4. The low temperature adaptive degreasing agent as recited in claim 1, wherein: the cosolvent is ethylene glycol.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965014A (en) * 1986-12-22 1990-10-23 Henkel Kommanditgesellschaft Auf Aktien Liquid nonionic surfactant mixtures
US5670473A (en) * 1995-06-06 1997-09-23 Sunburst Chemicals, Inc. Solid cleaning compositions based on hydrated salts
CN105369638A (en) * 2014-08-25 2016-03-02 江苏欣隆羽绒有限公司 Down feather degreasing agent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965014A (en) * 1986-12-22 1990-10-23 Henkel Kommanditgesellschaft Auf Aktien Liquid nonionic surfactant mixtures
US5670473A (en) * 1995-06-06 1997-09-23 Sunburst Chemicals, Inc. Solid cleaning compositions based on hydrated salts
CN105369638A (en) * 2014-08-25 2016-03-02 江苏欣隆羽绒有限公司 Down feather degreasing agent

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