CN116715963A - Additive composition, preparation method thereof and ultra-light release film - Google Patents
Additive composition, preparation method thereof and ultra-light release film Download PDFInfo
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- CN116715963A CN116715963A CN202310510254.7A CN202310510254A CN116715963A CN 116715963 A CN116715963 A CN 116715963A CN 202310510254 A CN202310510254 A CN 202310510254A CN 116715963 A CN116715963 A CN 116715963A
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- 239000000203 mixture Substances 0.000 title claims abstract description 54
- 239000000654 additive Substances 0.000 title claims abstract description 50
- 230000000996 additive effect Effects 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 50
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 47
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 46
- 229920002554 vinyl polymer Polymers 0.000 claims description 45
- 229920002545 silicone oil Polymers 0.000 claims description 32
- 150000003376 silicon Chemical class 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 14
- 229910021485 fumed silica Inorganic materials 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 229920002050 silicone resin Polymers 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 238000004873 anchoring Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 4
- CSXPRVTYIFRYPR-UHFFFAOYSA-N bis(ethenyl)-diethoxysilane Chemical compound CCO[Si](C=C)(C=C)OCC CSXPRVTYIFRYPR-UHFFFAOYSA-N 0.000 claims description 2
- ZPECUSGQPIKHLT-UHFFFAOYSA-N bis(ethenyl)-dimethoxysilane Chemical compound CO[Si](OC)(C=C)C=C ZPECUSGQPIKHLT-UHFFFAOYSA-N 0.000 claims description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 20
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 13
- 230000032683 aging Effects 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 239000003292 glue Substances 0.000 description 6
- 239000003112 inhibitor Substances 0.000 description 5
- 230000009194 climbing Effects 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000011056 performance test Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
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- IXHBSOXJLNEOPY-UHFFFAOYSA-N 2'-anilino-6'-(n-ethyl-4-methylanilino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound C=1C=C(C2(C3=CC=CC=C3C(=O)O2)C2=CC(NC=3C=CC=CC=3)=C(C)C=C2O2)C2=CC=1N(CC)C1=CC=C(C)C=C1 IXHBSOXJLNEOPY-UHFFFAOYSA-N 0.000 description 1
- JQZGUQIEPRIDMR-UHFFFAOYSA-N 3-methylbut-1-yn-1-ol Chemical compound CC(C)C#CO JQZGUQIEPRIDMR-UHFFFAOYSA-N 0.000 description 1
- AOOVIJCEQRHGNY-UHFFFAOYSA-N 3-methylpent-1-yn-1-ol Chemical compound CCC(C)C#CO AOOVIJCEQRHGNY-UHFFFAOYSA-N 0.000 description 1
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
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- 239000007858 starting material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of release films, and provides an additive composition and a preparation method thereof, and an ultralight release film.
Description
Technical Field
The invention relates to the technical field of release films, in particular to an additive composition, a preparation method thereof and an ultralight release film.
Background
A release film refers to a film having a surface with separability, and having no tackiness or slight tackiness after contacting with a specific material under limited conditions. The release film is divided into a light release film, a medium release film and a heavy release film according to the different release forces. The light release film is mainly applied to the field of die cutting processing, is a loss product which must be used in the die cutting production process, is attached to the adhesive surface of the die cutting product, plays a role in supporting the whole die cutting product and protecting the adhesive surface of the die cutting product in the whole production process, and is convenient to transport. Along with the improvement of the die cutting automation degree, the requirements on related die cutting products are gradually increased, and an ultra-light release film with ultra-light release force (release force: 1-3 g/in) is required to be adopted to better adapt to high-speed production. Chinese patent CN106280995a prepares a release film for OCA optical cement, but after aging at 70 ℃, the release force climbs significantly (> 5 g/in), which increases the risk of counter release in die cutting, resulting in product failure.
Because the release film in the current market cannot meet the requirement of an ultralight release film, development of an ultralight release film is needed, which not only has ultralight release force (release force: 1-3 g/in), but also has low release force climbing degree after high-temperature aging, good stability and high residual adhesion rate.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides an additive composition, a preparation method thereof and an ultralight release film. The additive composition provided by the invention can be further used for preparing an ultralight release film, the release force is less than 3g/in, the release force is still less than 3g/in after normal-temperature (25 ℃) aging and high-temperature (70 ℃) aging for 3 days, the stability is excellent, the residual adhesion rate is not less than 90%, and the risk of reverse release in die cutting can be avoided.
The first aspect of the present invention provides an additive composition.
Specifically, the additive composition comprises the following components:
vinyl silicone oil, vinyl silicone resin, surface-modified silica micropowder and surface-modified fumed silica;
the surface modified silicon micro powder is silicon micro powder with vinyl and hydrosilyl on the surface;
the surface modified fumed silica is fumed silica with vinyl and hydrosilyl groups on the surface.
The vinyl silicone resin is added into the additive composition provided by the invention, so that the crosslinking density is improved, the additive composition is further used for preparing the ultra-light release film, the release force of the ultra-light release film after high-temperature aging is still less than 3g/in, and the stability of the ultra-light release film is improved. In addition, the invention also adopts special surface modified silicon micropowder and surface modified fumed silica (fumed silica is commonly called white carbon black), and vinyl or silicon hydrogen groups are introduced into the surface of the filler (namely the silicon micropowder and the fumed silica), so that covalent bonds can be formed with silicone oil in the process of preparing the ultra-light release film, the compatibility and stability of the filler and the silicone oil are improved, the precipitation of the silicone oil is reduced, the anti-release risk caused by silicon transfer is reduced, and the residual adhesion rate is improved.
Preferably, the additive composition comprises the following components in parts by mass:
100 parts of vinyl silicone oil,
2-5 parts of vinyl silicone resin,
20-40 parts of surface modified silicon micropowder,
3-10 parts of surface modified fumed silica.
Preferably, the surface of the surface-modified silicon micropowder contains 0.01-0.1% of vinyl groups and 0.01-0.05% of hydrosilyl groups.
Preferably, the surface of the surface-modified fumed silica contains 0.05 to 0.1% of vinyl groups and 0.01 to 0.05% of hydrosilyl groups.
Preferably, the components of the additive composition further comprise an inhibitor.
Further preferably, the components of the additive composition further include 0.5 to 2 parts by mass of an inhibitor.
Preferably, the vinyl silicone oil has a vinyl content of 0.30% to 0.50%.
Further preferably, the vinyl silicone oil has a vinyl content of 0.40% to 0.50%.
Preferably, the mesh number of the surface modified silicon micropowder is 1000-1500.
Preferably, the surface-modified silicon micropowder is a surface-modified spherical silicon micropowder.
Preferably, the surface-modified fumed silica has a particle diameter D50 of 10-15nm, and a specific surface area of 170-380m 2 /g。
Preferably, the viscosity of the vinyl silicone resin is 600-1200cps, and the vinyl content of the vinyl silicone resin is 0.65% -0.80%.
Preferably, the inhibitor is at least one of alkynol, diallyl maleate, polyvinyl siloxane.
Preferably, the alkynol is methylbutynol or methylpentanynol.
In a second aspect, the invention provides a method of preparing an additive composition.
A method of preparing an additive composition comprising the steps of:
firstly, mixing vinyl silicone oil and surface modified silicon micropowder for the first time, stopping stirring, adding surface modified fumed silica for the second time, stopping stirring, adding vinyl silicone resin for the third time, and defoaming to obtain the additive composition; the three stirring speeds are the same or different.
According to the invention, through reasonably adjusting the addition sequence of the raw material components and stirring for a plurality of times, the silicon micropowder and the fumed silica are uniformly dispersed in the silicone oil matrix, the storage stability of the additive composition is improved, and the best comprehensive effect of the release agent is ensured.
Preferably, the mixing is performed by putting vinyl silicone oil and surface modified silicon micropowder into a planetary stirring kettle.
Preferably, the speed of the first stirring is 200-600r/min, and the time of the first stirring is 1-10 minutes.
Further preferably, the speed of the first stirring is 400-600r/min, and the time of the first stirring is 5-10 minutes.
Preferably, the speed of the second stirring is 500-1000r/min, and the time of the second stirring is 20-40 minutes.
Further preferably, the speed of the second stirring is 800-1000r/min, and the time of the second stirring is 30-40 minutes.
Preferably, the speed of the third stirring is 300-600r/min, and the time of the third stirring is 5-15 minutes.
Further preferably, the speed of the third stirring is 300-500r/min, and the time of the third stirring is 10-15 minutes.
The invention carries out multiple stirring, and is beneficial to uniformly dispersing the silicon micropowder and the fumed silica in the silicone oil matrix by reasonably regulating and controlling the stirring speeds at different moments, thereby improving the storage stability of the additive composition and ensuring the best comprehensive effect of the parting agent.
Preferably, the addition of vinyl silicone resin is accompanied by the addition of an inhibitor.
Preferably, the preparation method of the surface modified silicon micro powder comprises the steps of carrying out wet reaction on the silicon micro powder and a silane coupling agent for 1-h at 70-90 ℃ to obtain the surface modified silicon micro powder;
the preparation method of the surface modified fumed silica comprises the steps of carrying out wet reaction on fumed silica and a silane coupling agent for 1-3 hours at 70-90 ℃ to obtain the surface modified fumed silica;
the silane coupling agent is at least one of vinyl trimethoxy silane, vinyl triethoxy silane, divinyl diethoxy silane and divinyl dimethoxy silane.
Preferably, the mass ratio of the silane coupling agent to the silica micropowder is (1-5): 100.
Preferably, the mass ratio of the silane coupling agent to the fumed silica is (3-10): 100.
Preferably, the defoaming is vacuumizing, and the vacuumizing vacuum degree is more than-0.09 Mpa.
In a third aspect the invention provides the use of an additive composition.
Use of an additive composition in the preparation of a release film.
Preferably, the release film is an ultra-light release film, and the release force of the ultra-light release film is 1-3g/in.
An ultralight release film, which comprises the following raw material components: vinyl silicone oil, additive composition, solvent, anchoring agent, hydrogen-containing silicone oil and catalyst.
Preferably, the preparation raw material components of the ultra-light release film comprise, by mass: 100 parts of vinyl silicone oil, 5-8 parts of additive composition, 100-150 parts of solvent, 0.8-1.2 parts of anchoring agent, 2.5-3.0 parts of hydrogen-containing silicone oil and 1.5-2.5 parts of catalyst.
Further preferably, the ultra-light release film comprises the following raw material components in parts by mass: 100 parts of vinyl silicone oil, 6-8 parts of additive composition, 120-150 parts of solvent, 1-1.2 parts of anchoring agent, 2.5-3.0 parts of hydrogen-containing silicone oil and 2-2.5 parts of catalyst.
Preferably, the solvent is ethyl acetate.
Preferably, the anchoring agent is a dakangnin 9176 anchoring agent.
Preferably, the catalyst is a platinum catalyst.
Preferably, the release force of the ultra-light release film is 1-3g/in.
The preparation method of the ultra-light release film comprises the following steps:
firstly, mixing vinyl silicone oil and a solvent, adding an additive composition, then adding an anchoring agent and hydrogen-containing silicone oil, adding a catalyst, coating and curing to prepare the ultra-light release film.
Preferably, the curing temperature is 40-50 ℃, and the curing time is 12-36 hours.
Compared with the prior art, the invention has the following beneficial effects:
the additive composition provided by the invention adopts vinyl silicone oil, vinyl silicone resin, surface modified silicon micropowder and surface modified fumed silica as main components, wherein the surface modified silicon micropowder is silicon micropowder with vinyl and silicon hydride groups on the surface, the surface modified fumed silica is fumed silica with vinyl and silicon hydride groups on the surface, the additive composition is further used for preparing an ultra-light release film, the release force is 1-3g/in, the release force is still kept within 3g/in after aging at normal temperature (25 ℃) or aging at 70 ℃ for 3 days (d), the residual adhesion rate is not less than 90% by using a test tesa7475, and the additive composition provided by the invention is convenient to use and is suitable for mass coating.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples will be presented. It should be noted that the following examples do not limit the scope of the invention.
The starting materials, reagents or apparatus used in the following examples are all available from conventional commercial sources or may be obtained by methods known in the art unless otherwise specified.
Example 1
An additive composition having the components and amounts shown in Table 1.
The preparation method of the additive composition comprises the following steps:
1. adding vinyl silicone oil and surface modified silicon micropowder into a planetary stirring kettle, mixing, controlling the stirring speed to be 400r/min, and stirring for 5 minutes; wherein the surface modified silicon micro powder is silicon micro powder with vinyl and hydrosilyl on the surface, and the mass ratio of the vinyl trimethoxy silane to the silicon micro powder is 1:100, and then carrying out wet reaction for 2 hours at 80 ℃;
2. stopping stirring, adding the surface modified fumed silica, and stirring for 30min at 800 r/min; the surface modified fumed silica is fumed silica with vinyl and hydrosilyl groups on the surface, and is prepared by mixing vinyl trimethoxy silane and fumed silica according to a mass ratio of 3:100, and then carrying out wet reaction for 2 hours at 80 ℃;
3. stopping stirring, adding vinyl silicone resin and inhibitor, stirring for 10min at 500r/min, vacuumizing and defoaming, wherein the vacuum degree is above-0.09 Mpa;
4. stopping stirring, and discharging to obtain the additive composition.
Examples 2 to 4
Examples 2-4 provide additive compositions differing from example 1 in the components and amounts thereof, as shown in Table 1.
Table 1 Components and contents (unit: parts by mass) of the additive compositions of the examples
Comparative example 1
This comparative example provides an additive composition differing from example 1 in that the surface-modified fine silica powder was replaced with an equal mass part of unmodified fine silica powder.
Comparative example 2
This comparative example provides an additive composition that differs from example 1 in that the surface modified fumed silica is replaced with an equal mass portion of unmodified fumed silica.
Application example 1
Application example 1 provides an ultralight release film prepared by using the additive composition prepared in example 1 as a raw material component.
The preparation method of the ultra-light release film comprises the following steps:
1. the stirring barrel and auxiliary tools thereof are scrubbed, so that the stirring blades and the stirring barrel are ensured to be clean and no gel and other sundries are polluted;
2. 100 parts of vinyl silicone oil SF500 (viscosity 500 cps) and 120 parts of solvent (ethyl acetate, ETAC) were accurately weighed, added to a stirring tank, and stirred for 8min at a stirring rate: 900r/min. Stirring was stopped, 6 parts of the super additive composition prepared in example 1 was added, and stirring was performed for 8min at a stirring rate: 900r/min. Stirring was stopped, 1 part of anchor 9176 and 2.5 parts of hydrogen-containing silicone oil were added, and stirring was carried out for 8min at stirring rate: 800-1000r/min. Stopping stirring, adding 2 parts of platinum catalyst DOW-4000, stirring for 15min, and stirring speed: 900r/min;
3. stopping stirring, and pumping into a glue tank by a glue supply pump to perform coating;
4. and (3) placing the coated ultralight release film sample into a curing chamber for curing, wherein the temperature is controlled to be 45 ℃, and the curing time is 24 hours.
Application examples 2 to 4
Application examples 2 to 4 provide ultralight release films differing from application example 1 in that the additive composition prepared in example 1 was replaced with the additive compositions prepared in examples 2 to 4, respectively.
Comparative application example 1
Comparative application example 1 provides an ultralight release film comprising the following components: 100 parts of vinyl silicone oil SF500, 100 parts of solvent ethyl acetate, 5 parts of Wake light stripper SF500HJ, 1.0 part of anchoring agent 9176, 3.0 parts of cross-linking agent V60 and 2.0 parts of catalyst 4000.
Uniformly mixing the materials in the formula according to the preparation flow, and pumping the mixture into a glue groove through a glue supply pump to perform coating; placing the coated sample into a curing chamber, and curing for 24 hours at 45 ℃; after curing, the mixture is stabilized for 2 hours at room temperature, and then the ultra-light release film is prepared.
Comparative application example 2
Comparative application example 2 provides an ultralight release film comprising the following components: 100 parts of vinyl silicone oil SF500, 150 parts of solvent ethyl acetate, 8 parts of Dow light stripping agent SLY-OFF, 1.0 part of anchoring agent 9176, 3.0 parts of cross-linking agent V60 and 2.0 parts of catalyst 4000.
Uniformly mixing the materials in the formula according to the preparation flow, and pumping the mixture into a glue groove through a glue supply pump to perform coating; placing the coated sample into a curing chamber, and curing for 24 hours at 45 ℃; after curing, the mixture is stabilized for 2 hours at room temperature, and then the ultra-light release film is prepared.
Comparative application example 3
Comparative application example 3 provides an ultralight release film, differing from application example 1 in that the additive composition prepared in example 1 was replaced with the additive composition prepared in comparative example 1, respectively.
Comparative application example 4
Comparative application example 4 provides an ultralight release film, differing from application example 1 in that the additive composition prepared in example 1 was replaced with the additive composition prepared in comparative example 2, respectively.
Product effect test
The ultra-light release films prepared in the application examples and the comparative application examples are subjected to performance test, and the test conditions of the residual adhesion rate and the normal-temperature release force are 25 ℃ and the Relative Humidity (RH) is 50+/-5%. The test results are shown in table 2 below.
Table 2 results of Performance test of ultralight Release films prepared in each of application examples and comparative application examples
As shown in the table above, the residual adhesion rate of the ultralight release film prepared by adopting the additive composition of examples 1-4 is not lower than 90%, and the release force is small after 30min of normal temperature test, so that the requirement of the ultralight release film is met. The release force is still kept at a low level, not higher than 3g/in, with the extension of the test time, when tested at 70 ℃. The release force climbing degree of the ultra-light release film after the aging at normal temperature or high temperature is low, and the long-term stability is excellent.
The comparative application example 1 and the comparative application example 2 respectively adopt commercial Wake light stripping agent and Dow light stripping agent to prepare the ultra-light release film, and the residual adhesion rate is lower, and the release force is smaller when tested for 30min at normal temperature, but the release force is larger, the ageing climbing is obvious and the long-term stability is poor when tested at 70 ℃ along with the extension of the test time.
The comparative application example 3 and the comparative application example 4 respectively adopt silicon micropowder without surface modification and fumed silica without surface modification to prepare the ultra-light release film, the residual adhesion rate is lower, the release force tested for 30min at normal temperature is larger than that of application examples 1-4, and the release force is gradually larger along with the extension of the test time, the aging climbing is obvious, and the long-term stability is poor when tested at 70 ℃.
Claims (10)
1. An additive composition comprising the following components:
vinyl silicone oil, vinyl silicone resin, surface-modified silica micropowder and surface-modified fumed silica;
the surface modified silicon micro powder is silicon micro powder with vinyl and hydrosilyl on the surface;
the surface modified fumed silica is fumed silica with vinyl and hydrosilyl groups on the surface.
2. The additive composition according to claim 1, comprising the following components in parts by mass:
100 parts of vinyl silicone oil,
2-5 parts of vinyl silicone resin,
20-40 parts of surface modified silicon micropowder,
3-10 parts of surface modified fumed silica.
3. A process for the preparation of an additive composition according to claim 1 or 2, characterized in that it comprises the steps of:
firstly, mixing vinyl silicone oil and surface modified silicon micropowder for the first time, stopping stirring, adding surface modified fumed silica for the second time, stopping stirring, adding vinyl silicone resin for the third time, and defoaming to obtain the additive composition; the three stirring speeds are the same or different.
4. The method according to claim 3, wherein the surface-modified fine silica powder is prepared by wet-reacting fine silica powder and a silane coupling agent at 70-90 ℃ for 1-3 hours;
the preparation method of the surface modified fumed silica comprises the steps of carrying out wet reaction on fumed silica and a silane coupling agent for 1-3 hours at 70-90 ℃ to obtain the surface modified fumed silica;
the silane coupling agent is at least one of vinyl trimethoxy silane, vinyl triethoxy silane, divinyl diethoxy silane and divinyl dimethoxy silane.
5. A method of preparing according to claim 3, wherein the first stirring is carried out at a speed of 200-600r/min for a period of 1-10 minutes.
6. A method of preparing according to claim 3, wherein the speed of the second stirring is 500-1000r/min and the time of the second stirring is 20-40 minutes.
7. A method of preparing according to claim 3, wherein the speed of the third stirring is 300-600r/min and the time of the third stirring is 5-15 minutes.
8. Use of the additive composition of claim 1 or 2 for the preparation of a release film.
9. The ultra-light release film is characterized by comprising the following raw material components: vinyl silicone oil, the additive composition according to claim 1 or 2, a solvent, an anchor agent, hydrogen-containing silicone oil and a catalyst.
10. The method for preparing the ultra-light release film according to claim 9, which is characterized by comprising the following steps:
firstly, mixing vinyl silicone oil and a solvent, adding an additive composition, then adding an anchoring agent and hydrogen-containing silicone oil, adding a catalyst, coating and curing to prepare the ultra-light release film.
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| CN202310510254.7A CN116715963A (en) | 2023-05-08 | 2023-05-08 | Additive composition, preparation method thereof and ultra-light release film |
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