CN106635357B - A kind of high detergency is low to steep semi-synthetic grinding fluid and preparation method thereof - Google Patents

A kind of high detergency is low to steep semi-synthetic grinding fluid and preparation method thereof Download PDF

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CN106635357B
CN106635357B CN201611223124.1A CN201611223124A CN106635357B CN 106635357 B CN106635357 B CN 106635357B CN 201611223124 A CN201611223124 A CN 201611223124A CN 106635357 B CN106635357 B CN 106635357B
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grinding fluid
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synthetic
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CN106635357A (en
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梅晖
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Quick Chemistry (china) Co Ltd
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    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00Lubricating compositions containing more than 10% water
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    • C10M2209/10Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/04Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
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    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
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    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/04Detergent property or dispersant property
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    • C10N2040/00Specified use or application for which the lubricating composition is intended
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    • C10N2040/22Metal working with essential removal of material, e.g. cutting, grinding or drilling

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  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

The invention discloses a kind of low semi-synthetic grinding fluid of bubble of high detergency, the components including following weight percent content: self-emulsifying ester 15~30%;Organic acid 5~10%;Organic amine 10~15%;Antirust agent 10~15%;Emulsifier 1~2%;Surfactant 0.5~1%;Coupling agent 2~5%;Fungicide 1~2%;Surplus is water.The low semi-synthetic grinding fluid of bubble of high detergency of the invention, has excellent cleansing performance and excellent low bubble performance, does not use the environmentally hazardous raw material such as sodium nitrite, nonylphenol class, boric acid, makes product more green, environmental protection.The invention also discloses the low preparation methods for steeping semi-synthetic grinding fluid of above-mentioned high detergency.

Description

High-cleanness low-foam semisynthetic grinding fluid and preparation method thereof
Technical Field
The invention relates to a high-cleanness low-foam semi-synthetic grinding fluid and a preparation method thereof.
Background
The grinding machining is a common metal machining mode, redundant materials on a workpiece are cut off by using a grinding wheel rotating at a high speed, machining allowance is small, and size precision is high. The grinding fluid matched with the grinding fluid mainly plays roles in cooling, lubricating, washing, rust prevention and the like. The traditional water-insoluble grinding fluid consists of base oil and a small amount of oil-soluble additives, has good lubricity and rust resistance, but has serious potential safety hazard of flammability, and meanwhile, the oil mist generated in the processing process can also influence the physical health of operators, so the application of the water-based grinding fluid is more and more popular recently. The water-based grinding fluid is basically divided into semi-synthetic type and fully synthetic type. The fully synthetic grinding fluid consists of water and soluble chemical components, has good cooling property and foaming property, but has relatively poor lubricating property. The semi-synthetic grinding fluid contains lubricating components such as base oil, synthetic ester, long-chain fatty acid and the like, is emulsified in water by using a surfactant, has both cooling performance and lubricating performance in performance, and has a relatively wide application range.
However, the existing semi-synthetic grinding fluid also has a plurality of problems in application. Firstly, the formula contains more emulsifying agents for emulsifying lubricating components such as base oil, synthetic ester and the like, the emulsifying agents cause a large amount of foams in the circulation and spraying processes of the grinding fluid, if the control is not good, a liquid tank can overflow to pollute a working area, meanwhile, the existing automatic grinding fluid cooling circulation system is provided with a liquid level alarm, and the rising foams can trigger the alarm to cause abnormal shutdown, so that the normal production rhythm is influenced.
Secondly, a large amount of grinding dust is generated in the grinding process, the grinding dust splashes to the inner wall of the machine tool along with the grinding fluid and is combined with viscous components in the grinding fluid to form black dirt, the black dirt is difficult to wash away by the grinding fluid after a long time, and an operator needs to spend extra time for cleaning regularly. If the dirt is adhered to automatic transmission devices such as a tool rest, a rotating shaft and the like, abnormal shutdown accidents can also be caused.
Thirdly, the prior semisynthetic grinding fluid uses sodium nitrite, nonyl phenol surfactant, boric acid and other raw materials which are harmful to the environment and the human health. Sodium nitrite is widely used in grinding fluid due to its good rust prevention effect and low price, but it is converted into nitrosamine under certain conditions and has strong carcinogenicity. Nonyl phenol surfactants have good emulsifying capacity, but are decomposed to form nonyl phenol, which accumulates in the organism and is toxic to the reproductive system of the organism. Boric acid has certain antirust and bactericidal effects, but also has toxicity to the reproductive system of organisms.
Disclosure of Invention
The invention aims to provide a high-cleanness low-foam semisynthetic grinding fluid which has excellent cleanness and excellent low-foam performance, and does not use raw materials such as sodium nitrite, nonyl phenol, boric acid and the like which are harmful to the environment, so that the product is more green and environment-friendly.
The invention also aims to provide a preparation method of the semi-synthetic grinding fluid with high detergency and low foam.
One technical scheme for achieving the above purpose is as follows: a high-cleanness low-foam semi-synthetic grinding fluid comprises the following components in percentage by weight:
the semi-synthetic grinding fluid with high cleanness and low foam is prepared by polymerizing and modifying vegetable oil to obtain a synthetic ester; the structural formula of the self-emulsifying ester contains ester groups and carboxyl active groups; the main carbon chain of the self-emulsifying ester is of a branched chain structure, and 2-4 polyoxyethylene groups and 4-8 polyoxypropylene groups are added simultaneously; the HLB value of the self-emulsifying ester is 6-8.
The high-cleanness low-foam semisynthetic grinding fluid is characterized in that the organic acid is one or a mixture of more of refined tall oil acid, refined vegetable oil acid, dimer acid, neodecanoic acid, lactic acid, gluconic acid and isooctanoic acid; wherein,
the content of abietic acid in the refined tall oil acid is 25-30%;
the refined vegetable oil acid is extracted from palm oil, and the freezing point of the refined vegetable oil acid is 6 ℃.
The high-cleanness low-foam semisynthetic grinding fluid is characterized in that the organic amine is one or a mixture of more of isopropanolamine, diisopropanolamine, triisopropanolamine, 2-amino-2-methylpropanol, 3-butoxypropylamine and N, N-dibutylethanol.
The high-cleanness low-foam semisynthetic grinding fluid is characterized in that the antirust agent is one or a mixture of more of amine salt of lauric acid, tall oil acid diethanolamide, benzotriazole derivative, oleoyl sarcosine and lauroyl amino acid.
The high-cleanness low-foam semisynthetic grinding fluid is characterized in that the emulsifier is one or a mixture of more of fatty amine polyoxyethylene polyoxypropylene ether, polyisobutylene maleic anhydride, ether carboxylate and sodium lignosulphonate; wherein,
the carbon chain length of the fatty amine polyoxyethylene polyoxypropylene ether is C16-C18, the polyoxyethylene addition number is 6-10, and the polyoxypropylene addition number is 4-6;
the carbon chain length of the ether carboxylate is C8-C10, and the addition number of polyoxyethylene on the carbon chain of the ether carboxylate is 6-8.
The high-cleanness low-foam semisynthetic grinding fluid is characterized in that the surfactant is a cationic surfactant, and the surfactant is one or a mixture of polyethylene imine, dodecyl trimethyl ammonium chloride and dioctadecyl dimethyl ammonium chloride.
The high-cleanness low-foam semisynthetic grinding fluid is characterized in that the coupling agent is long-carbon-chain fatty alcohol with a branched-chain structure.
The semi-synthetic grinding fluid with high cleanness and low foam is prepared by mixing benzisothiazolinone, copper pyrithione sodium or iodopropynyl butylcarbamate.
The raw materials are all commercial products.
The invention also provides a preparation method of the high-detergency low-foam semi-synthetic grinding fluid, which comprises the following steps:
step A, sequentially adding self-emulsifying ester, organic acid, organic amine, antirust agent and emulsifier into a reaction kettle, controlling the temperature at 25-40 ℃, and stirring for 30 minutes at the stirring speed of 400-800 rpm;
step B, sequentially adding water, the bactericide and the coupling agent into the reaction kettle, and continuously stirring for 30 minutes at the stirring speed of 400-800 rpm;
step C, adding a surfactant into the reaction kettle, and stirring for 30 minutes at a stirring speed of 400-800 rpm;
and D, sampling, analyzing, discharging and packaging.
Compared with the prior art, the technical scheme of the high-cleanness low-foam semi-synthetic grinding fluid and the preparation method thereof has the following advantages:
(1) excellent detergency: materials (such as mineral oil, amine borate salts, borate esters, etc.) which tend to cause tackiness of grinding fluid residues have been excluded from formulation design; secondly, by introducing the cationic surfactant with weaker polarity and matching with the emulsifier and the self-emulsifying ester, the product obtains excellent wetting capacity, and the grinding ash generated in the grinding process is quickly and effectively wetted and wrapped by the grinding fluid and is washed away by the grinding fluid.
(2) Excellent low foam performance: the foam of traditional semi-synthetic grinding fluids is mainly caused by anionic and nonionic surfactants in the formulation. The surface of the liquid film of the foam is covered with anionic and nonionic surfactants, and the more stable the foam is, the longer the foam lasts. After the proper weak cationic surfactant is added into the formula, due to the interaction of the cationic surfactant and the anionic surfactant, a liquid film of the foam cannot be stable, and the foam duration is short, so that the defoaming effect is achieved. On the other hand, by introducing the self-emulsifying ester, the dosage of the emulsifier is reduced, and the generation of foam is reduced by phase change;
(3) during the formula design, the raw materials such as sodium nitrite, nonyl phenol, boric acid and the like which are harmful to the environment are not used, so that the product is more green and environment-friendly.
Drawings
FIG. 1 is a comparison graph of dynamic surface tension of the high-detergency low-foam semi-synthetic grinding fluid of the present invention and a conventional product under 5% tap water.
Detailed Description
The present inventors, in order to better understand the technical solution of the present invention, will now be described in detail by referring to the specific embodiments with reference to the attached drawings:
a high-cleanness low-foam semi-synthetic grinding fluid comprises the following components in percentage by weight:
the self-emulsifying ester is a synthetic ester obtained by polymerizing and modifying vegetable oil; the chemical ester has a structural formula containing ester groups and carboxyl active groups; the main carbon chain of the esterified ester is a branched chain structure, and 2-4 polyoxyethylene groups and 4-8 polyoxypropylene groups are added simultaneously; the HLB value of the esterified ester is 6-8.
The organic acid is one or more of refined tall oil acid, refined vegetable oil acid, dimer acid, neodecanoic acid, lactic acid, gluconic acid and isooctanoic acid; wherein the content of abietic acid in the refined tall oil acid is 25-30%; the refined vegetable oil acid is extracted from palm oil, and the freezing point of the refined vegetable oil acid is 6 ℃.
The organic amine is one or a mixture of more of isopropanolamine, diisopropanolamine, triisopropanolamine, 2-amino-2-methylpropanol, 3-butoxypropylamine and N, N-dibutylethanol.
The antirust agent is one or a mixture of more of amine salt of lauric acid, tall oil acid diethanolamide, benzotriazole derivatives, oleoyl sarcosine and lauroyl amino acid.
The emulsifier is one or a mixture of several of fatty amine polyoxyethylene polyoxypropylene ether, polyisobutylene maleic anhydride, ether carboxylate and sodium lignosulfonate; wherein the carbon chain length of the fatty amine polyoxyethylene polyoxypropylene ether is C16-C18, the addition number of polyoxyethylene is 6-10, and the addition number of polyoxypropylene is 4-6; the carbon chain length of the ether carboxylate is C8-C10, and the addition number of polyoxyethylene on the carbon chain of the ether carboxylate is 6-8.
The surfactant is cationic surfactant, and is one or more of polyethyleneimine, dodecyl trimethyl ammonium chloride and dioctadecyl dimethyl ammonium chloride.
The coupling agent is a long carbon chain fatty alcohol with a branched structure.
The bactericide is a mixture of benzisothiazolinone, copper pyrithione sodium or iodopropynyl butyl carbamate.
The raw materials are all commercial products.
Example 1
A high-cleanness low-foam semi-synthetic grinding fluid comprises the following components in percentage by weight:
example 2
A high-cleanness low-foam semi-synthetic grinding fluid comprises the following components in percentage by weight:
example 3
A high-cleanness low-foam semi-synthetic grinding fluid comprises the following components in percentage by weight:
the highly clean, low-foam semi-synthetic grinding fluids of examples 1 to 3 were prepared by the following production steps:
step A, adding self-emulsifying ester, organic acid, organic amine, antirust agent and emulsifier into a reaction kettle according to the formula amount in sequence, controlling the temperature at 25-40 ℃, and stirring for 30 minutes;
step B, sequentially adding water, the bactericide and the coupling agent into the reaction kettle, and continuously stirring for 30 minutes;
step C, finally adding the surfactant into the reaction kettle, and stirring for 30 minutes;
and D, sampling, analyzing, discharging and packaging.
The stirring speed of the stirring kettle is controlled to be 400-800 rpm.
In the process of developing the high-detergency low-foam semi-synthetic grinding fluid, the inventor designs different components and different proportions of the components according to the requirements of low-foam and high-cleanness performances required by products. The cleaning performance depends on the wettability and the permeability of the product, the formula concept of the weak cationic surfactant and the self-emulsifying ester is adopted, the wetting and the permeability of the product are greatly improved, and the foam performance of the product is also well improved. The grinding dust produced during grinding is mostly fine metal powder, the surface of which is usually negatively charged. Therefore, the cationic surfactant is more easily attached to the surface of the metal powder, thereby achieving the effect of quick wetting. Cationic surfactants have not been used in traditional semi-synthetic grinding fluids primarily because they can interfere with the emulsification of emulsifiers (which typically contain large amounts of anionic surfactants), resulting in emulsion breaking and other undesirable consequences. The invention selects the cationic surfactant with weaker polarity, and the emulsifier and the self-emulsifying ester which are tested and selected have better compatibility and little influence on the stability of the emulsion. The foam of traditional semi-synthetic grinding fluids is mainly caused by emulsifiers (including anionic and nonionic surfactants) in the formulation. The surface layer of the liquid film of the foam is covered with an anionic surfactant and a nonionic surfactant, and the closer the arrangement between the surface active molecules, the longer the foam lasts. After the proper cationic surfactant is added into the formula, due to the interaction of the cationic surfactant and the anionic surfactant, a liquid film of the foam cannot be stabilized, and the foam duration is short, so that the defoaming effect is achieved. The self-emulsifying ester used in the invention contains polyether, ester and carboxylic acid structures in a single molecule, and the special structure ensures good lubricity, has certain emulsification and good wetting performance, reduces the dosage of the emulsifier and reduces the generation of foams. And secondly, the grinding fluid has good hard water resistance, so that the grinding fluid is more stable in the using process, and the generation of metal soap which is easy to adhere to grinding dust is reduced.
The performance comparison of the high-cleanness low-foam semi-synthetic grinding fluid and the traditional semi-synthetic grinding fluid is tested.
Foam performance:
the circulating pump test method was used, the nozzle was 120 cm from the liquid surface, the flow was 12 liters per minute, and the foam performance test results are shown in table 1:
5% tap water Traditional product High-detergency low-foam semi-synthetic grinding fluid
Foam height (ml) 120 70
Defoaming time (minutes) 20 5
TABLE 1
Wetting property:
the cotton cloth is lightly placed on the surface of the grinding fluid, the time required for the cotton cloth to be completely wetted and sink into the grinding fluid is recorded, the shorter the time, the stronger the wetting and settling capacity of the grinding fluid is, and the results of the wetting performance test are shown in the table 2:
5% tap water Traditional product High-detergency low-foam semi-synthetic grinding fluid
Wetting time 60 seconds 10 seconds
TABLE 2
Meanwhile, the dynamic surface tension can well reflect the wetting capacity of the product:
referring to fig. 1, the dynamic surface tension of the highly-detergent low-foam semi-synthetic grinding fluid 1 of the present invention is compared with that of the conventional product 2 under the condition of 5% tap water, and as can be seen from fig. 1, compared with the conventional grinding fluid, the highly-detergent low-foam semi-synthetic grinding fluid of the present invention has very low dynamic surface tension, and thus has very good wetting property.
In conclusion, the high-detergency low-foam semisynthetic grinding fluid disclosed by the invention has excellent detergency and low-foam performance, and does not use raw materials such as sodium nitrite, nonyl phenol and boric acid which are harmful to the environment, so that the product is more green and environment-friendly.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative only and not limiting as to the invention, and that changes in the above described embodiments will fall within the purview of the appended claims, provided they fall within the true spirit and scope of the invention.

Claims (2)

1. The high-cleanness low-foam semi-synthetic grinding fluid is characterized by comprising the following components in percentage by weight:
the self-emulsifying ester is a synthetic ester obtained by polymerizing and modifying vegetable oil; the structural formula of the self-emulsifying ester contains ester groups and carboxyl active groups; the main carbon chain of the self-emulsifying ester is of a branched chain structure, and 2-4 polyoxyethylene groups and 4-8 polyoxypropylene groups are added simultaneously; the HLB value of the self-emulsifying ester is 6-8;
the organic acid is one or a mixture of more of refined tall oil acid, refined vegetable oil acid, dimer acid, neodecanoic acid, lactic acid, gluconic acid and isooctanoic acid; wherein,
the content of abietic acid in the refined tall oil acid is 25-30%;
the refined vegetable oil acid is extracted from palm oil, and the freezing point of the refined vegetable oil acid is 6 ℃;
the organic amine is one or a mixture of more of isopropanolamine, diisopropanolamine, triisopropanolamine, 2-amino-2-methylpropanol, 3-butoxypropylamine and N, N-dibutylethanol;
the antirust agent is one or a mixture of more of amine salt of lauric acid, tall oil acid diethanolamide, benzotriazole derivatives, oleoyl sarcosine and lauroyl amino acid;
the emulsifier is one or a mixture of more of fatty amine polyoxyethylene polyoxypropylene ether, polyisobutylene maleic anhydride, ether carboxylate and sodium lignosulfonate; wherein,
the carbon chain length of the fatty amine polyoxyethylene polyoxypropylene ether is C16-C18, the polyoxyethylene addition number is 6-10, and the polyoxypropylene addition number is 4-6;
the carbon chain length of the ether carboxylate is C8-C10, and the addition number of polyoxyethylene on the carbon chain of the ether carboxylate is 6-8;
the surfactant is a cationic surfactant, and is one or a mixture of polyethylene imine, dodecyl trimethyl ammonium chloride and dioctadecyl dimethyl ammonium chloride;
the coupling agent is long-carbon-chain fatty alcohol with a branched-chain structure;
the bactericide is a mixture of benzisothiazolinone, copper pyrithione sodium or iodopropynyl butyl carbamate.
2. The preparation method of the high-cleanness low-foam semi-synthetic grinding fluid as claimed in claim 1, which is characterized by comprising the following steps:
step A, sequentially adding self-emulsifying ester, organic acid, organic amine, antirust agent and emulsifier into a reaction kettle, controlling the temperature at 25-40 ℃, and stirring for 30 minutes at the stirring speed of 400-800 rpm;
step B, sequentially adding water, the bactericide and the coupling agent into the reaction kettle, and continuously stirring for 30 minutes at the stirring speed of 400-800 rpm;
step C, adding a surfactant into the reaction kettle, and stirring for 30 minutes at a stirring speed of 400-800 rpm;
and D, sampling, analyzing, discharging and packaging.
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