CN117324536A - Modified silicone oil emulsion release agent and preparation method thereof - Google Patents
Modified silicone oil emulsion release agent and preparation method thereof Download PDFInfo
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- CN117324536A CN117324536A CN202311221974.8A CN202311221974A CN117324536A CN 117324536 A CN117324536 A CN 117324536A CN 202311221974 A CN202311221974 A CN 202311221974A CN 117324536 A CN117324536 A CN 117324536A
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- silicone oil
- modified silicone
- release agent
- chain alkyl
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- 229920002545 silicone oil Polymers 0.000 claims abstract description 95
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 61
- 239000000839 emulsion Substances 0.000 claims abstract description 43
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 31
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000006229 carbon black Substances 0.000 claims abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 21
- 239000001257 hydrogen Substances 0.000 claims abstract description 21
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims abstract description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000003213 activating effect Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical group [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 8
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims 4
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004132 cross linking Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000011241 protective layer Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 11
- 230000002209 hydrophobic effect Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006459 hydrosilylation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Silicon Polymers (AREA)
Abstract
The invention provides a modified silicone oil emulsion release agent and a preparation method thereof. The modified silicone oil emulsion release agent is prepared from the following raw materials in parts by weight: long-chain alkyl modified silicone oil, dimethyl silicone oil, an emulsifier, a catalyst and white carbon black; the mass ratio of the long-chain alkyl modified silicone oil to the dimethyl silicone oil to the emulsifier to the white carbon black is (10-20)/(40-50)/(6-15)/(1-5); the HLB value of the emulsifier is 7-10; the dosage of the catalyst is 1% -6% of the dosage of the white carbon black; the preparation method of the long-chain alkyl modified silicone oil comprises the following steps: mixing chloroplatinic acid and end-side hydrogen-containing silicone oil, activating, adding octene, reacting for 4-8h at 85-110 ℃, and removing unreacted octene to obtain the finished product. In the using process of the release agent provided by the invention, a release agent protective layer is formed on the surface of the die through a crosslinking reaction, so that the release effect, the high temperature resistance and the durability can be improved.
Description
Technical Field
The invention relates to the technical field of release agents, in particular to a modified silicone oil emulsion release agent and a preparation method thereof.
Background
The primary function of the release agent is to prevent or reduce mechanical damage to the molded article as it is ejected from the mold. The water-based release agent has the characteristics of lubricity and release property of the traditional release agent and environmental protection, has great market demands in China, is called industrial monosodium glutamate in the die casting industry, and is a novel release agent with great potential. Water is the main component in the water-based release agent and serves as a carrier for the active ingredient thereof. The content of ion-exchanged water or drinking water is generally 95% or more. However, the water-based release agent has poor heat resistance. The silicone oil has the characteristics of small surface tension, good heat resistance, low solubility parameter and the like, and is an ideal release agent material.
A mold release agent is a functional substance that is interposed between the mold and the finished product. At present, the release agent used in the market has poor release effect at high temperature, and influences the surface finish and integrity of the cast product, thereby reducing the surface quality of the cast product.
Disclosure of Invention
The invention provides a modified silicone oil emulsion release agent and a preparation method thereof, which overcome or at least partially overcome the problems and defects in the prior art, and the release agent provided by the invention can enable castings to be quickly separated from a die without adhesion and pollution, can effectively improve the smoothness and the integrity of the castings, and can effectively improve the surface quality and the precision of casting products.
The invention provides a modified silicone oil emulsion release agent which is prepared from the following raw materials: long-chain alkyl modified silicone oil, dimethyl silicone oil, an emulsifier and a catalyst; the mass ratio of the long-chain alkyl modified silicone oil to the dimethyl silicone oil to the emulsifier is (10-20)/(40-50)/(6-15); the HLB value of the emulsifier is 7-10; the dosage of the catalyst is 1 to 6 weight percent of the dosage of the white carbon black;
the preparation method of the long-chain alkyl modified silicone oil comprises the following steps: mixing chloroplatinic acid and end-side hydrogen-containing silicone oil, activating, adding octene, reacting for 4-8h at 85-110 ℃, and removing unreacted octene to obtain the finished product.
In a preferred embodiment of the present invention, in the method for producing a long-chain alkyl-modified silicone oil, the molar ratio of the terminal-side hydrogen-containing silicone oil (the silicon hydrogen bond in the terminal-side hydrogen-containing silicone oil) to octene (the carbon-carbon double bond in octene) is 1 (1-1.6).
In a specific embodiment of the present invention, the hydrogen content of the terminal hydrogen-containing silicone oil is preferably 0.53% to 0.82%. In the present invention, "%" is mass percent unless otherwise specified.
In a preferred embodiment of the present invention, in the production method of the long-chain alkyl-modified silicone oil, chloroplatinic acid is used in an amount of 10 to 50ppm based on the total amount of the raw materials of the reaction (production reaction of the long-chain alkyl-modified silicone oil), except for chloroplatinic acid, i.e., the total amount of chloroplatinic acid, hydrogen-containing silicone oil on the terminal side and octene.
In a preferred embodiment of the present invention, the long-chain alkyl-modified silicone oil used in the present invention is prepared at an activation temperature of 60 to 80℃for 1 to 3 hours.
In a preferred embodiment of the present invention, the use of an emulsifier having such an HLB value in combination with other components to prepare a release agent is one of the core inventions of the present invention. In the invention, two or more composite emulsifying agents with different HLB values are preferably used, so that the obtained release agent has better stability in order to facilitate emulsification, and the emulsifying agent is preferably composed of Span-60 and Tween-60. That is, the emulsifiers of the present invention are preferably Span-60 and Tween-60. When the two emulsifiers are used for preparing the composite emulsifier, the amounts of Span-60 and Tween-60 only need to meet the HLB value of 7-10 of the final composite emulsifier.
In a preferred embodiment of the present invention, the catalyst in the modified silicone oil-based emulsion release agent of the present invention is tetramethylammonium hydroxide in order to better react the other materials of the present invention with the particular long chain alkyl-modified silicone oil.
In a specific embodiment of the present invention, the ingredients in the raw materials in the modified silicone oil type emulsion release agent provided by the present invention are known to those skilled in the art, and of course, include water, and the water is added in an amount such that the solid content of the emulsion is 20% -50%.
In a preferred embodiment of the invention, the raw materials in the modified silicone oil type emulsion release agent provided by the invention consist of long-chain alkyl modified silicone oil, dimethyl silicone oil, white carbon black, an emulsifier, a catalyst and water. That is, preferably, the modified silicone oil emulsion release agent provided by the invention is prepared from the following raw materials in parts by weight: 10-20 parts of long-chain alkyl modified silicone oil, 40-50 parts of dimethyl silicone oil, 2-3 parts of white carbon black, 6-15 parts of emulsifying agent and a catalyst; wherein the catalyst is 1-6wt% of the white carbon black, and the water is used to make the solid content of the emulsion 20-50%.
In the present invention, the parts by weight may be those known in the art such as mu g, mg, g, kg, or may be multiples thereof such as 1/10, 1/100, 10 times, 100 times, etc. In the present invention, the amount of each substance is determined according to the above ratio, and the total mass part of the substances is not necessarily 100 parts by weight, and may be less than 100 parts by weight, and may be more than 100 parts by weight, as long as the amount is within the above ratio.
The invention also aims to provide a preparation method of the modified silicone oil emulsion release agent, which comprises the following steps:
1) Mixing white carbon black and dimethyl silicone oil according to a proportion, reacting for 4-8 hours at 120-160 ℃, and cooling to 40-70 ℃;
2) Adding long-chain alkyl modified silicone oil and an emulsifier into the system obtained in the step 1) according to the proportion, and shearing and stirring to obtain the modified silicone oil.
In one embodiment of the present invention, the shearing speed in step 2) may be 6000-10000r/min and the shearing time may be 10-30min.
According to the modified silicone oil emulsion release agent provided by the invention, octene and hydrogen-containing silicone oil are used as basic raw materials, a catalyst with a specific proportion is added to promote the hydrosilylation reaction, and an emulsifier with a specific proportion is added to ensure that the modified silicone oil emulsion release agent has good storage stability, so that a release agent protection layer is formed on the surface of a mould through a crosslinking reaction in the use process of the modified silicone oil emulsion release agent, and further the release effect, high temperature resistance and durability can be improved.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
The embodiment provides a modified silicone oil emulsion release agent, and the preparation method comprises the following steps:
the long-chain alkyl modified silicone oil is prepared by the following steps: 30ppm of chloroplatinic acid and 50g of end-side hydrogen-containing silicone oil (a seedling wetting material RH-LHC-2, the hydrogen content of which is 0.77%) are mixed, 51.8g of octene is dripped after activation for one hour at 70 ℃, the temperature is raised to 100 ℃, after reaction for 6 hours, the excessive octene is pulled out by pumping negative pressure, and the long-chain alkyl modified silicone oil is obtained.
The preparation method of the modified silicone oil emulsion release agent provided in the embodiment comprises the following steps:
(1) 1 part of hydrophobic white carbon black and 40 parts of dimethyl silicone oil are added into a three-necked flask, tetramethyl ammonium hydroxide (1 wt% of the amount of the hydrophobic white carbon black) is added, the mixture is slowly stirred and heated to 150 ℃, the reaction is carried out for 5 hours under heat preservation, and the temperature is reduced to 70 ℃.
(2) Adding 11 parts of long-chain alkyl modified silicone oil and 11 parts of composite emulsifier into the system obtained in the step (1), mechanically stirring uniformly, slowly adding deionized water to prepare emulsion with 40% of solid content, and fully stirring for 20min by adopting a high-speed shearing machine 8000r/min to obtain the modified silicone oil emulsion release agent. Wherein Span-60 (hlb=4.7) and Tween-60 (hlb=14.9) were used to prepare the composite emulsifier having an HLB value of 8.0.
Example 2
The embodiment provides a modified silicone oil emulsion release agent, and the preparation method comprises the following steps:
the long-chain alkyl modified silicone oil is prepared by the following steps: 40ppm chloroplatinic acid and 50g end-side hydrogen-containing silicone oil (a seedling wetting material RH-LHC-3, the hydrogen content is 0.82%) are mixed, 55.2g octene is dripped after activation for one hour at 70 ℃, the temperature is raised to 100 ℃, after reaction for 6 hours, the excessive octene is pulled out by pumping negative pressure, and the long-chain alkyl modified silicone oil is obtained.
The preparation method of the modified silicone oil emulsion release agent provided in the embodiment comprises the following steps:
(1) 3 parts of hydrophobic white carbon black and 40 parts of dimethyl silicone oil are added into a three-necked flask, tetramethyl ammonium hydroxide (2 wt percent of the use amount of the hydrophobic white carbon black) is added, the mixture is slowly stirred and heated to 150 ℃, the reaction is carried out for 5 hours under heat preservation, and the temperature is reduced to 70 ℃.
(2) Adding 11 parts of long-chain alkyl modified silicone oil and 11 parts of composite emulsifier into the system obtained in the step (1), mechanically stirring uniformly, slowly adding deionized water to prepare emulsion with 40% of solid content, and fully stirring for 20min by adopting a high-speed shearing machine 8000r/min to obtain the modified silicone oil emulsion release agent. Wherein Span-60 (hlb=4.7) and Tween-60 (hlb=14.9) were used to prepare the composite emulsifier having an HLB value of 8.0.
Example 3
The embodiment provides a modified silicone oil emulsion release agent, and the preparation method comprises the following steps:
the long-chain alkyl modified silicone oil is prepared by the following steps: 50ppm of chloroplatinic acid and 50g of hydrogen-containing silicone oil at the end side (hydrogen content is 0.75%) are mixed, 50.4g of octene is dripped after activation for one hour at 70 ℃, the temperature is raised to 100 ℃, after reaction for 6 hours, the excessive octene is pulled out by pumping negative pressure, and the long-chain alkyl modified silicone oil is obtained.
The preparation method of the modified silicone oil emulsion release agent provided in the embodiment comprises the following steps:
(1) 3 parts of hydrophobic white carbon black and 40 parts of dimethyl silicone oil are added into a three-necked flask, tetramethyl ammonium hydroxide (3 wt percent of the dosage of the hydrophobic white carbon black) is added, the mixture is slowly stirred and heated to 150 ℃, the reaction is carried out for 5 hours under the condition of heat preservation, and the temperature is reduced to 70 ℃.
(2) Adding 11 parts of long-chain alkyl modified silicone oil and 11 parts of composite emulsifier into the system obtained in the step (1), mechanically stirring uniformly, slowly adding deionized water to prepare emulsion with 30% of solid content, and fully stirring for 20min by adopting a high-speed shearing machine 8000r/min to obtain the modified silicone oil emulsion release agent. Wherein Span-60 (hlb=4.7) and Tween-60 (hlb=14.9) were used to prepare the composite emulsifier having an HLB value of 8.0.
Example 4
The embodiment provides a modified silicone oil emulsion release agent, and the preparation method comprises the following steps:
the long-chain alkyl modified silicone oil is prepared by the following steps: 50ppm of chloroplatinic acid and 50g of end-side hydrogen-containing silicone oil (hydrogen content is 0.58%) are mixed, 39.1g of octene is dripped after activation for one hour at 70 ℃, the temperature is raised to 100 ℃, after reaction for 6 hours, the excessive octene is removed by pumping negative pressure, and the long-chain alkyl modified silicone oil is obtained.
The preparation method of the modified silicone oil emulsion release agent provided in the embodiment comprises the following steps:
(1) 3 parts of hydrophobic white carbon black and 40 parts of dimethyl silicone oil are added into a three-necked flask, tetramethyl ammonium hydroxide (4 wt percent of the hydrophobic white carbon black) is added, the mixture is slowly stirred and heated to 150 ℃, the reaction is carried out for 5 hours under the heat preservation, and the temperature is reduced to 70 ℃.
(2) Adding 11 parts of long-chain alkyl modified silicone oil and 11 parts of composite emulsifier into the system obtained in the step (1), mechanically stirring uniformly, slowly adding deionized water to prepare emulsion with 30% of solid content, and fully stirring for 20min by adopting a high-speed shearing machine 8000r/min to obtain the modified silicone oil emulsion release agent. Wherein Span-60 (hlb=4.7) and Tween-60 (hlb=14.9) were used to prepare the composite emulsifier having an HLB value of 8.0.
Experimental example
1. The release agents obtained in examples 1 to 4 and comparative examples 1 to 3 (wherein, comparative example 1 is an outsourced dyhigh 406 release agent, comparative example 2 is an outsourced wake E1006 release agent, and comparative example 3 is an outsourced homemade canthus PETS release agent) were coated on a metal mold.
Polishing a steel plate with the thickness of 120 multiplied by 60mm, and then coating a release agent, wherein the release agent is not too thick, and the coating is uniform and consistent, and the phenomenon of leakage brush hanging flow is avoided; baking in a constant temperature oven at 220 deg.C, 230 deg.C, 240 deg.C, 250 deg.C, 260 deg.C, 270 deg.C, 280 deg.C for half an hour, taking out, comparing and observing the color change of the surface film layer of the steel sheet, and performing thermal stability detection (blackening and charring phenomena are considered to occur, and the results are shown in the following Table 1:
TABLE 1 thermal stability test results
2. Isolation release experiments were performed using the release agents obtained in examples 1 to 4 and the release agents of comparative examples 1 to 3.
And uniformly brushing a release agent on the polished and scrubbed surface of the metal mold for 3 times (recorded as one time of coating), wherein each time is 5min apart, and airing at room temperature for standby. Cutting the prepreg, placing the prepreg into a die, starting to heat up to 180 ℃, preserving heat for 30min to enable the prepreg to flow glue fully, pressurizing (about 0.5 MPa), heating to the forming temperature of 190 ℃ or 200 ℃, preserving heat for 2 hours, naturally cooling, then demolding the die, and recording the times of effective demolding.
The release agent is milky in appearance, stored at room temperature, observed for oil-water separation, and recorded for storage time.
The results are shown in Table 2 below:
table 2 isolation demolding test results
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The modified silicone oil emulsion release agent is characterized by being prepared from the following raw materials: long-chain alkyl modified silicone oil, dimethyl silicone oil, an emulsifier, a catalyst and white carbon black; the mass ratio of the long-chain alkyl modified silicone oil to the dimethyl silicone oil to the emulsifier to the white carbon black is (10-20)/(40-50)/(6-15)/(1-5); the HLB value of the emulsifier is 7-10; the dosage of the catalyst is 1 to 6 weight percent of the dosage of the white carbon black;
the preparation method of the long-chain alkyl modified silicone oil comprises the following steps: mixing chloroplatinic acid and end-side hydrogen-containing silicone oil, activating, adding octene, reacting for 4-8h at 85-110 ℃, and removing unreacted octene to obtain the finished product.
2. The modified silicone oil-based emulsion release agent according to claim 1, wherein the molar ratio of the terminal hydrogen-containing silicone oil to octene is 1 (1-1.6).
3. The modified silicone-based emulsion release agent according to claim 1, wherein the chloroplatinic acid is used in an amount of 10 to 50ppm.
4. The modified silicone oil-based emulsion release agent according to claim 1, wherein the hydrogen content of the terminal hydrogen-containing silicone oil is 0.53% to 0.82%.
5. A modified silicone-based emulsion release agent as claimed in any one of claims 1 to 3, characterized in that the activation temperature is 60-80 ℃ and the activation time is 1-3 hours.
6. A modified silicone-based emulsion release agent as claimed in any one of claims 1 to 3, wherein the emulsifiers are Span-60 and Tween-60.
7. A modified silicone oil emulsion release agent as claimed in any one of claims 1 to 3 wherein said catalyst is tetramethylammonium hydroxide.
8. A modified silicone-based emulsion release agent as claimed in any one of claims 1 to 3, characterized in that said raw material further comprises water in an amount such that the solids content of the emulsion is 20% -50%.
9. A modified silicone oil emulsion release agent according to any one of claims 1 to 3, prepared from the following raw materials in parts by weight: long-chain alkyl modified silicone oil, dimethyl silicone oil, white carbon black, an emulsifier, a catalyst and water.
10. A method for preparing the modified silicone oil emulsion release agent as claimed in any one of claims 1 to 9, characterized by comprising the steps of:
1) Mixing white carbon black and dimethyl silicone oil according to a proportion, reacting for 4-8 hours at 120-160 ℃, and cooling to 40-70 ℃;
2) Adding long-chain alkyl modified silicone oil and an emulsifier into the system obtained in the step 1) according to the proportion, and shearing and stirring to obtain the modified silicone oil.
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| CN202311221974.8A CN117324536A (en) | 2023-09-21 | 2023-09-21 | Modified silicone oil emulsion release agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311221974.8A CN117324536A (en) | 2023-09-21 | 2023-09-21 | Modified silicone oil emulsion release agent and preparation method thereof |
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|---|---|---|---|
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| Country | Link |
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| CN (1) | CN117324536A (en) |
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2023
- 2023-09-21 CN CN202311221974.8A patent/CN117324536A/en active Pending
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