CN108707914A - A kind of agent of non-phosphate degreasing and preparation method thereof and application method - Google Patents
A kind of agent of non-phosphate degreasing and preparation method thereof and application method Download PDFInfo
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- CN108707914A CN108707914A CN201810535371.8A CN201810535371A CN108707914A CN 108707914 A CN108707914 A CN 108707914A CN 201810535371 A CN201810535371 A CN 201810535371A CN 108707914 A CN108707914 A CN 108707914A
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
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Abstract
The invention discloses a kind of agent of non-phosphate degreasing and preparation method thereof and application method, it is phosphorous to solve degreasing agent in the prior art, has the problem of pollution to environment, its key points of the technical solution are that a kind of agent of non-phosphate degreasing, including following components：3-12 parts of metasilicate pentahydrate sodium；Gluconic acid receives 4-7 parts；2-6 parts of dispersant with high efficiency；1-4 parts of disodium ethylene diamine tetraacetate；1-4 parts of citric acid；8-25 parts of surfactant；15-30 parts of sodium carbonate；60-80 parts of water.To have this agent of non-phosphate degreasing while environmental protection, there is long-acting lasting degreasing effect, can be used for soak degreasing；Has the function of quick degreasing, blistering is lasting less, and degreasing speed is fast, and rinsing speed is fast, so as to shorten the time of entire degreasing operation；In the preparation process of degreasing agent, without heating, safe ready is prepared；In addition to degreasing, also have the effect of decontamination, sterilizing, derusting rust-proofing, is particularly suitable for the degreasing of metal material.
Description
Technical field
The present invention relates to degreasing agent field, more particularly to a kind of agent of non-phosphate degreasing and preparation method thereof.
Background technology
Degreasing agent is the product for removing body surface greasy dirt, and degreasing is one of basic working procedure of Coating Pretreatment, it
The effects that using efficient liquid to the saponification of grease and dirt, wetting, emulsification, infiltration, rolling off, dispersion and solubilising, is workpiece surface
Various greases, dust silt, metal powder, hand perspiration and its workpiece adhered in process it is oil stains dirty efficient
Removal.
Degreasing agent in the prior art, phosphorus are added in degreasing agent in the form of phosphate, and common phosphate has trimerization
Sodium phosphate, disodium hydrogen phosphate, tertiary sodium phosphate etc., they act as emulsification, buffering, complexing in degreasing agent, and with good
Washing and the low feature of use cost.
Phosphorus in the environment, can progress into underground water, and the phosphorous water of long-term drinking can make one osteoporosis, occur
The lesions such as lower jaw osteonecrosis.Thus, phosphorus pollution is very harmful for human body, it is necessary to it is existing to replace to research and develop a kind of agent of non-phosphate degreasing
The phosphorous degreasing agent having.
Invention content
The object of the present invention is to provide a kind of agent of non-phosphate degreasing, it is advantageous that, Phosphateless environmentally friendly has low bubble oil removing simultaneously
Fast good characteristic.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of agent of non-phosphate degreasing, including following components：
By using above-mentioned technical proposal, during metasilicate pentahydrate sodium is soluble easily in water and dilute alkaline soln, have de-sludging, emulsification,
Dispersion, the effect of moistening, while as pH value buffer agent, the whole pH value of solution is more stablized.
It when carrying out degreasing to metal surface, when especially metal surface needs coating, needs to carry out stringent cleaning, lead to
The effect of sodium gluconate in degreasing agent is crossed, coating can be made to be combined with metal surface and more stablized.
By the effect of dispersant with high efficiency, each component is made uniformly to be dispersed in water, especially improves surfactant
Dispersibility in water improves the degreasing effect and degreasing efficiency of degreasing agent.
Disodium ethylene diamine tetraacetate is a kind of good compounding agent, can form stable chela with the metallic in degreasing agent
Object is closed, to improve the stability of degreasing agent；Meanwhile when metal surface carries out degreasing, disodium ethylene diamine tetraacetate and gold
Belong to and the oxide of metal surface forms complex compound sediment, to form layer protecting film in metal surface, while degreasing,
Derusting and antirust are achieved the effect that.
By the way that sodium carbonate is added, is hydrolyzed, generate hydroxide ion, kept degreasing agent generally alkaline, utilize hydrogen
Oxygen radical ion can promote grease hydrolysis, to improve the degreasing effect and degreasing efficiency of degreasing agent.
By the addition of surfactant, surfactant has hydrophilic radical and hydrophobic grouping, wherein hydrophilic section is with water
Molecule combines and forms micella group, and hydrophobic grouping and grease molecules structure are similar thus compatible with grease, are transported by mechanical friction
It is dynamic, it just pulls open grease molecules are loose, pulls in water, to have the function that take away grease from body surface.
When using degreasing agent, the surface of solution produces certain bubble, by the way that citric acid, citric acid and carbonic acid is added
Sodium reacts heat release, while producing a large amount of carbon dioxide.The higher carbon dioxide of temperature rises to solution out of solution
Surface, and entering in bubble, bubble internal pressure and temperature increase suddenly, bubble chamber film be difficult to bear unexpected increased pressure and
The temperature of promotion and rupture, to reduce bubble.
Thus, grease is become prone to be walked from the surface erosion of object by liquid by this degreasing agent using surfactant, together
When, it will partly be difficult to rush the grease fallen using hydroxide ion and be hydrolyzed, grease is decomposed into higher fatty acids and glycerine, from
And work along both lines, relative to common degreasing agent, degreasing effect is good, and degreasing efficiency is high.
Preferably, the dispersant with high efficiency is propylene glycol block polyether.
By using above-mentioned technical proposal, propylene glycol block polyether is ignored copolymerization by polyethylene oxide and polyoxy propane and is formed,
And polyethylene oxide is hydrophilic group, and polyoxy propane is hydrophobic group, thus can be by the hydroaropic substance and hydrophobicity in degreasing agent
Substance uniformly mixes, and improves the dispersibility of various substances in water, to improve the degreasing efficiency of degreasing agent.
Propylene glycol block polyether has good suds.The content of propylene glycol block polyether ethylene oxide is relatively low, dredges
Aqueous oxide segments length is longer, and dissolubility of the propylene glycol block polyether in foaming system is poor, thus prevent and
Degree of scatter of the gas in foaming system is reduced, to reduce the ability that agent of non-phosphate degreasing forms foam.
Meanwhile the brokenly bubble of propylene glycol block ether is relatively low, the classification of ethylene oxide segment enters liquid film and on liquid film surface
It sprawls, readily diffuses into liquid film surface and act, improve liquid film strength and viscosity so that brokenly bubble performance declines.
It to make whole agent of non-phosphate degreasing, shows, foam is less, but the good characteristic of durable lather.
Preferably, the surfactant includes：7-20 parts of nonylphenol polyoxyethylene ether and 1-5 parts of ethylene glycol only son
Ether.
By using above-mentioned technical proposal, nonylphenol polyoxyethylene ether be nonyl phenol and ethylene oxide under the action of catalyst
The nonionic surfactant of condensation reaction has good peptizaiton.Nonyl phenol under the action of ehter bond, improve its
Dissolubility in aqueous solution.Meanwhile the foam stability of polyoxyethylene ether is poor, is easy to defoam.
Ethylene glycol monobutyl ether HLB value is moderate, thus can be used as wetting agent, reduces the surface tension of degreasing agent so that
Test specimen is easier to be soaked by degreasing agent, to improve the tightness degree that degreasing agent is contacted with test specimen, to improve degreasing agent
Degreasing efficiency.Meanwhile there is certain inhibition for defoaming to a certain extent, thus pass through nonylphenol polyoxyethylene ether
With the proportioning of ethylene glycol monobutyl ether, the antifoam performance of degreasing agent can be controlled.
Preferably, further including 6-12 parts of hydrogen peroxide in the agent of non-phosphate degreasing.
It reacts with sodium carbonate after hydrogen peroxide is added by using above-mentioned technical proposal, generates SODIUM PERCARBONATE.It crosses
After sodium carbonate is dissolved in water, active oxygen is produced, thus there is good detergency ability for surface of test piece, meanwhile, have
The effect of sterilizing, protects surface of test piece, prevents test specimen by bacteria attack.
Thus after carrying out sterilizing to metal surface, complexing of the disodium ethylene diamine tetraacetate to metal surface is recycled
Effect forms layer protecting film, to improve protecting effect of the protective film to metal.
Preferably, further including 1-4 parts of magnesium hypochlorite in the agent of non-phosphate degreasing.
Stabilization, portion are played to the formation of SODIUM PERCARBONATE by the way that magnesium hypochlorite is added by using above-mentioned technical proposal
Magnesium is divided to react Sheng Chengliao [ with hydrogen peroxide;Mg(OH)(OOH)], to play inhibiting effect to the decomposition of hydrogen peroxide, meanwhile, it is secondary
Magron and sodium metasilicate are jointly and Action of Metal Ions, it is suppressed that catalytic activity, to inhibit SODIUM PERCARBONATE to decompose.
Meanwhile magnesium hypochlorite has good sterilization, part magnesium hypochlorite is with SODIUM PERCARBONATE jointly to metal
Surface carries out sterilizing, improves the effect of the protective film formed to the complexing of metal surface by disodium ethylene diamine tetraacetate
Fruit, to further improve protective effect of the protective film to metal, meanwhile, which prevents magnesium hypochlorite to metal
Corrosion.
Preferably, the agent of non-phosphate degreasing specifically includes：
By using above-mentioned technical proposal, the proportioning of agent of non-phosphate degreasing, agent of non-phosphate degreasing tool are carried out in the ratio of this programme
There are the comprehensive performances such as good degreasing effect, defoaming, antivirus property.
A kind of preparation method of agent of non-phosphate degreasing, includes the following steps：
S1,6-12 parts of hydrogen peroxide is put into reaction kettle, and 3-12 parts of metasilicate pentahydrate sodium, 1-4 parts of ethylenediamine is added
Tetraacethyl disodium, 1-4 parts of magnesium hypochlorite carries out uniform stirring 5min；
S2, the temperature in reaction kettle is adjusted to 0-5 DEG C, and 15-30 parts of sodium carbonate is put into reaction kettle, continued uniformly
Stir 30min；
S3,60-80 parts of water are put into reaction kettle, carries out uniform stirring 5min；
S4,2-6 parts of dispersant with high efficiency is put into reaction kettle, carries out uniform stirring 5min；
S5,4-7 parts of sodium gluconate, 8-25 parts of surfactant are put into progress uniform stirring 15min in reaction kettle,
Form solution A；
S6, the citric acid of 1-4 parts of preparation are spare.
By using above-mentioned technical proposal, by hydrogen peroxide, metasilicate pentahydrate sodium, disodium ethylene diamine tetraacetate, magnesium hypochlorite
It is uniformly mixed, then by sodium carbonate input reaction, reaction generates SODIUM PERCARBONATE.In the process, disodium ethylene diamine tetraacetate,
Magnesium hypochlorite, metasilicate pentahydrate sodium play the role of internal stabilizer, to prevent the decomposition of SODIUM PERCARBONATE.
Dispersant with high efficiency, surfactant are added, as outer stabilizer, inside it by SODIUM PERCARBONATE package, to
The decomposition rate of SODIUM PERCARBONATE is delayed.Meanwhile the hydrophilic radical of dispersant with high efficiency and surfactant towards surface of test piece and
Hydrophobic grouping outwardly, to be modified to the surface of SODIUM PERCARBONATE, reduces the water imbibition of SODIUM PERCARBONATE, improves percarbonic acid
The stability of sodium has delayed the decomposition rate of SODIUM PERCARBONATE, to extend SODIUM PERCARBONATE in use to surface of test piece
Action time, improve its decontamination, sterilization, Disinfection Effect.
A kind of application method of agent of non-phosphate degreasing, includes the following steps：
A1, it will be mixed in 1-4 parts of citric acids addition solution As；
A2, it is diluted with water mixing；
A3, degreasing operation is carried out.
It by using above-mentioned technical proposal, is added in solution A by citric acid, in agent of non-phosphate degreasing, sodium carbonate is
It is excessive, thus citric acid reacts with sodium carbonate, generates the higher carbon dioxide bubble of temperature, citric acid and sodium carbonate
React heat release, while producing a large amount of carbon dioxide.The higher carbon dioxide of temperature rises to the table of solution out of solution
Face, and enter in bubble, bubble internal pressure and temperature increase suddenly, and bubble chamber film is difficult to bear unexpected increased pressure and carry
Rise temperature and rupture, to reduce bubble.
Preferably, A1 is specifically included：Solution A is added in rinse bath, then 1-4 parts of citric acid is added to cleaning
In slot, stir evenly spare；
A2 is specifically included：It will uniformly be mixed with 1: 13 ratio with water in mixed solution in A1；
A3 is specifically included：Test specimen to be cleaned is put into rinse bath and is impregnated.
By using above-mentioned technical proposal, test specimen is put into rinse bath and is impregnated, since this degreasing agent has long-acting take off
Fat effect has a small amount of lasting bubble, meanwhile, SODIUM PERCARBONATE is decomposed slowly, thus surface of test piece can be held
Long degreasing and decontamination.
Preferably, A1 is specifically included：Solution A is added in fluid reservoir, then 1-4 parts of citric acid is added to liquid storage
In tank, stir evenly spare；
A2 is specifically included：It will uniformly be mixed with 1: 13 ratio with water in mixed solution in A1；
A3 is specifically included：Using high-pressure cleaning gun, the mixed solution of degreasing agent and water is ejected into the surface of test specimen to be cleaned.
By using above-mentioned technical proposal, using high-pressure cleaning gun, under high pressure, the dilution of agent of non-phosphate degreasing is sprayed to
The surface of test specimen, agent of non-phosphate degreasing carry out quick degreasing to the grease of surface of test piece rapidly, less due to blistering, thus convenient for examination
The short rinse of part, to improve the speed of whole degreasing operation.
In conclusion the invention has the advantages that：
1, with long-acting lasting degreasing effect, it can be used for soak degreasing；
2, has the function of quick degreasing, blistering is lasting less, and degreasing speed is fast, and rinsing speed is fast, so as to shorten entire de-
The time of fat operation；
3, in the preparation process of degreasing agent, without heating, safe ready is prepared；
4, this degreasing agent also has the effect of decontamination, sterilizing, derusting rust-proofing, is particularly suitable for metal material in addition to degreasing
Degreasing.
Description of the drawings
Fig. 1 is a kind of preparation technology figure of agent of non-phosphate degreasing；
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
The each component used in this patent is commercially available industrial chemicals.
Embodiment 1,
A kind of agent of non-phosphate degreasing, which is characterized in that the agent of non-phosphate degreasing specifically includes：
A kind of preparation method of agent of non-phosphate degreasing, includes the following steps：
S1,9 parts of hydrogen peroxide is put into reaction kettle, and 8 parts of metasilicate pentahydrate sodium, 3 parts of ethylenediamine tetra-acetic acid two is added
Sodium, 3 parts of magnesium hypochlorite carry out uniform stirring 5min；
S2, the temperature in reaction kettle is adjusted to 2 DEG C, and 24 parts of sodium carbonate is put into reaction kettle, continue uniform stirring
30min；S3,70 parts of water are put into reaction kettle, carries out uniform stirring 5min；
S3,4 parts of propylene glycol block polyether is put into reaction kettle, carries out uniform stirring 5min；
S4,5 parts of sodium gluconate, 13 parts of nonylphenol polyoxyethylene ether, 3 parts of ethylene glycol monobutyl ethers are put into reaction kettle
Uniform stirring 15min is carried out, solution A is formed；
S5, the citric acid of 2 parts of preparation are spare.
The specifically used method one of agent of non-phosphate degreasing：Infusion method
A1：Solution A is added in rinse bath, then 1-4 parts of citric acid is added in rinse bath, is stirred evenly spare；
A2：It will uniformly be mixed with 1: 13 ratio with water in mixed solution in A1；
A3：Test specimen to be cleaned is put into rinse bath and is impregnated.
The specifically used method two of agent of non-phosphate degreasing：Gunite
A1：Solution A is added in fluid reservoir, then 1-4 parts of citric acid is added in fluid reservoir, is stirred evenly spare；
A2：It will uniformly be mixed with 1: 13 ratio with water in mixed solution in A1；
A3：Using high-pressure cleaning gun, the mixed solution of degreasing agent and water is ejected into the surface of test specimen to be cleaned.
Embodiment 2- embodiments 7,
Embodiment 2- embodiments 7 utilize preparation method and application method similarly to Example 1, to agent of non-phosphate degreasing component and
The mass fraction of each component adjusts.
Comparative example 10 is the derusting degreaser of the model YH-366 of Shijiazhuang Tianshan Mountains milky way Science and Technology Ltd. production；
Comparative example 11 is the industrial high-efficient degreaser of the model LF-185 of Wenzhou Long Fei Environmental Protection Technology Co., Ltd production；
It is further improved according to the detection method in QMG-J59.016-2011, to embodiment 1 to embodiment 7 and comparative example 8
To comparative example 11 carries out foam height, there are duration, degreasing effect, rinsing performance, corrosive nature detections for foam.
Specific detection mode：
Foam height：The working solution for preparing 5% mass concentration, with 100 milliliters of tool plug measure it is plainly-packed enter 30 milliliters prepared it is de-
Lipoprotein solution, the speed shaken under 50 with 30 seconds that closes the lid are shaken 3 minutes, and upright, the observation foam height in 30-60 seconds is then allowed to stand
It spends (including degreasing fluid height).
There are durations for foam：Foam height is down to 32 milliliters of time from 35 milliliters.
Degreasing effect：By production test piece in the working solution of 5% mass concentration (temperature control at 20 DEG C) quiet stain 3 minutes
Pendulum is washed 3 minutes, and it is 30 ± 1 beats/min (round-trip is primary) that pendulum, which washes frequency, and distance is 50 ± 2mm, proposes test piece and in distilled water
Middle pendulum is washed 5 times, and test piece is placed in 45 degree of angles, observes surface, does not hang droplet, and moisture film is continuous whole for qualification.
Rinsing performance：By production test piece, quiet stain 3 minutes, pendulum are washed 3 minutes in the working solution of 5% mass concentration, and pendulum is washed
Frequency is 30 ± 1 beats/min (round-trip be primary), and distance is 50 ± 2mm, and proposition test piece and being put in distilled water washes 5 times, immediately
Taking-up dries up test piece with air-heater.It checks residue of the strip without degreasing agent, then drips absolute ethyl alcohol in test piece, second
It is remained without white in re-inspection test piece after alcohol volatilizees naturally.
Corrosive nature：Working solution is heated to 55-65 DEG C, leaching galvanizing test plate (panel) is in the working solution of 5% mass concentration, and 5
It is clean that washing is taken out after minute, it should be without the powder of white spot corrosion depending on galvanizing test plate (panel) surface.
Anti-microbial property：Anti-microbial property detection is carried out according to the operating method of ISO22196-2011.
The experimental performance testing result table of degreasing agent in embodiment 1 to embodiment 7 and comparative example 8 to comparative example 11：
It from upper table, can draw the following conclusions, the agent of non-phosphate degreasing in this patent has compared with the prior art：
1, with long-acting lasting good degreasing effect, it can be used for soak degreasing；
2, has the function of quick degreasing, blistering is lasting less, and degreasing speed is fast, and rinsing speed is fast, so as to shorten entire de-
The time of fat operation；
3, this degreasing agent also has the effect of decontamination, sterilizing, derusting rust-proofing in addition to degreasing.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (10)
1. a kind of agent of non-phosphate degreasing, which is characterized in that including following components：
3-12 parts of metasilicate pentahydrate sodium；
Gluconic acid receives 4-7 parts；
2-6 parts of dispersant with high efficiency；
1-4 parts of disodium ethylene diamine tetraacetate；
1-4 parts of citric acid；
8-25 parts of surfactant；
15-30 parts of sodium carbonate；
60-80 parts of water.
2. a kind of agent of non-phosphate degreasing according to claim 1, which is characterized in that the dispersant with high efficiency is propylene glycol block
Polyethers.
3. a kind of agent of non-phosphate degreasing according to claim 1, which is characterized in that the surfactant includes：7-20 parts
Nonylphenol polyoxyethylene ether and 1-5 parts of ethylene glycol monobutyl ethers.
4. a kind of agent of non-phosphate degreasing according to claim 1, which is characterized in that further include 6-12 in the agent of non-phosphate degreasing
The hydrogen peroxide of part.
5. a kind of agent of non-phosphate degreasing according to claim 4, which is characterized in that further include 1-4 in the agent of non-phosphate degreasing
The magnesium hypochlorite of part.
6. a kind of agent of non-phosphate degreasing according to claim 5, which is characterized in that the agent of non-phosphate degreasing specifically includes：
8 parts of metasilicate pentahydrate sodium；
Gluconic acid receives 5 parts；
4 parts of propylene glycol block polyether；
3 parts of disodium ethylene diamine tetraacetate；
2 parts of citric acid；
13 parts of nonylphenol polyoxyethylene ether；
3 parts of ethylene glycol monobutyl ether；
24 parts of sodium carbonate；
9 parts of hydrogen peroxide；
3 parts of magnesium hypochlorite；
70 parts of water.
7. a kind of preparation method of agent of non-phosphate degreasing, which is characterized in that include the following steps：
S1,6-12 parts of hydrogen peroxide is put into reaction kettle, and 3-12 parts of metasilicate pentahydrate sodium, 1-4 parts of ethylenediamine is added
Tetraacethyl disodium, 1-4 parts of magnesium hypochlorite carries out uniform stirring 5min；
S2, the temperature in reaction kettle is adjusted to 0-5 DEG C, and 15-30 parts of sodium carbonate is put into reaction kettle, continued uniformly
Stir 30min；
S3,60-80 parts of water are put into reaction kettle, carries out uniform stirring 5min；
S4,2-6 parts of propylene glycol block polyether is put into reaction kettle, carries out uniform stirring 5min；
S5,4-7 parts of sodium gluconate, 8-25 parts of surfactant are put into progress uniform stirring 15min in reaction kettle,
Form solution A；
S6, the citric acid of 1-4 parts of preparation are spare.
8. a kind of application method of agent of non-phosphate degreasing, which is characterized in that include the following steps：
A1, it will be mixed in 1-4 parts of citric acids addition solution As；
A2, it is diluted with water mixing；
A3, degreasing operation is carried out.
9. a kind of application method of agent of non-phosphate degreasing according to claim 8, which is characterized in that
A1 is specifically included：Solution A is added in rinse bath, then 1-4 parts of citric acid is added in rinse bath, is stirred evenly
It is spare；
A2 is specifically included：It will uniformly be mixed with 1: 13 ratio with water in mixed solution in A1；
A3 is specifically included：Test specimen to be cleaned is put into rinse bath and is impregnated.
10. a kind of application method of agent of non-phosphate degreasing according to claim 8, which is characterized in that
A1 is specifically included：Solution A is added in fluid reservoir, then 1-4 parts of citric acid is added in fluid reservoir, is stirred evenly
It is spare；
A2 is specifically included：It will uniformly be mixed with 1: 13 ratio with water in mixed solution in A1；
A3 is specifically included：Using high-pressure cleaning gun, the mixed solution of degreasing agent and water is ejected into the surface of test specimen to be cleaned.
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| CN115074987A (en) * | 2022-07-26 | 2022-09-20 | 无锡美兴龙化工科技有限公司 | Fabric degreasing bleaching agent and using method thereof |
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| 王慧娟: "《染整新技术学术讨论会选辑 下》", 31 December 1984 * |
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|---|---|---|---|---|
| CN112877704A (en) * | 2021-01-13 | 2021-06-01 | 厦门腾兴隆化工有限公司 | Environment-friendly oil removing agent and preparation method thereof |
| CN115074987A (en) * | 2022-07-26 | 2022-09-20 | 无锡美兴龙化工科技有限公司 | Fabric degreasing bleaching agent and using method thereof |
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