Release agent with low release-force increase and high residual adhesion and preparation method therefor, and release film

Abstract

Disclosed in the present invention are a release agent with low release-force increase and high residual adhesion and a preparation method therefor, and a release film. The release agent comprises the following raw material components in parts by weight: 5-20 parts of diol hydroxyl double-end silicone oil, 1-6 parts of a reactive diluent, 20-80 parts of isocyanato acrylate, 0.025-1 parts of p-benzoquinone, 0.01-0.04 parts of a catalyst, 15-60 parts of a solvent, 0.75-3 parts of 3,4-ethylenedioxythiophene, and 0.25-1 parts of a photoinitiator. A silicone release film prepared by the present invention has low release-force increase and high residual adhesion properties, a uniform and stable release coating, and good weather resistance, is more environmentally friendly, and has a stable peeling effect on tapes.

Description

Low-climbing high-residual release agent, preparation method thereof and release film TECHNICAL FIELD

[0001] The present application relates to the field of release materials, in particular to a low-climbing high-residual release agent, a preparation method thereof and a release film. BACKGROUND

[0002] Release films are often used as protective isolation films for pressure-sensitive adhesive tapes, providing ideal peeling forces without losing the adhesion of the pressure-sensitive adhesive. This is because the low surface tension provided by silicone resins makes it difficult for substances with high surface energy to adhere. Release films have a wide range of applications in daily life and the electronics industry. However, the mainstream release films on the market currently are basically processed using thermal curing, resulting in high VOC and high energy consumption, and the high-temperature curing environment further limits their application in the electronics industry. At the same time, release films often exhibit poor local release in electronic die-cutting applications, and some die-cut pieces cannot be separated from the release film when the machine automatically unwinds, seriously affecting production efficiency and quality. Therefore, it is of great significance to design a new type of high-performance photocurable silicone release agent, which should have uniform and stable surface properties, while maintaining a low climbing and high residual adhesion rate.

[0003] Patent CN118006248A discloses a silicone OCA release film and a preparation method thereof, which improves the adhesion between the silicone oil and the substrate by adding a flexible coating layer between the rigid silicone oil coating and the substrate, saving the cost of the protective film. However, this scheme uses thermal curing, resulting in high VOC during production, and cannot guarantee low climbing and high residual.

[0004] Patent CN115124749B discloses an antistatic optical release film for OCA optical adhesive and a preparation method thereof, which has a double antistatic effect by setting an antistatic layer and an antistatic release layer with conductive particles. However, the conductive particles tend to agglomerate, which can lead to poor adhesion of the release layer and low residual adhesion rate.

[0005] Therefore, it is necessary to improve the existing technology to provide a more reliable solution. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a low-climbing high-residual release agent, a preparation method thereof and a release film to address the deficiencies in the prior art.

[0007] To solve the above technical problems, the technical solution adopted by the present application is as follows: In a first aspect, the present application provides a low-climbing high-residual release agent, which comprises the following raw material components by weight:

[0008] Diol hydroxyl double terminated silicone oil 5-20 parts, reactive diluent 1-6 parts, isocyanyl acrylate 20-80 parts, p-benzoquinone 0.025-1 part, catalyst 0.01-0.04 parts, solvent 15-60 parts, 3,4-ethylenedioxythiophene 0.75-3 parts, photoinitiator 0.25-1 part.

[0009] Preferably, the isocyanyl acrylate is one or more of isocyanatoethyl methacrylate, 2-(2-isocyanatoethoxy)ethyl methacrylate and 1,1-bis(acryloyloxymethyl)ethyl isocyanate.

[0010] Preferably, the reactive diluent is dipropylene glycol diacrylate.

[0011] Preferably, the catalyst is dibutyltin dilaurate.

[0012] Preferably, the photoinitiator is hydroxyphenyl ketone.

[0013] Preferably, the low climb high residual release agent comprises the following raw material components by weight parts:

[0014] Diol hydroxyl double terminated silicone oil 10 parts, dipropylene glycol diacrylate 2 parts, isocyanatoethyl methacrylate 40 parts, p-benzoquinone 0.05 parts, dibutyltin dilaurate 0.02 parts, ethyl acetate 30 parts, 3,4-ethylenedioxythiophene 1.5 parts, hydroxyphenyl ketone 0.5 parts.

[0015] Preferably, the low climb high residual release agent comprises the following raw material components by weight parts:

[0016] Diol hydroxyl double terminated silicone oil 10 parts, dipropylene glycol diacrylate 2 parts, 2-(2-isocyanatoethoxy)ethyl methacrylate 40 parts, p-benzoquinone 0.05 parts, dibutyltin dilaurate 0.02 parts, ethyl acetate 30 parts, 3,4-ethylenedioxythiophene 1.5 parts, hydroxyphenyl ketone 0.5 parts.

[0017] Preferably, the low climb high residual release agent comprises the following raw material components by weight parts:

[0018] Diol hydroxyl double terminated silicone oil 10 parts, dipropylene glycol diacrylate 2 parts, 1,1-bis(acryloyloxymethyl)ethyl isocyanate 40 parts, p-benzoquinone 0.05 parts, dibutyltin dilaurate 0.02 parts, ethyl acetate 30 parts, 3,4-ethylenedioxythiophene 1.5 parts, hydroxyphenyl ketone 0.5 parts.

[0019] In a second aspect of the present application, a method for preparing a low climb high residual release agent as described above is provided, comprising the following steps:

[0020] S1, the diol hydroxyl double-terminated silicone oil is placed in a reaction vessel, heated to 60-70 DEG C, then add p-benzoquinone, isocyanyl acrylate and dibutyl tin dilaurate, stirring, using IR monitoring system in the change of the characteristic peak of -NCO function group, until the characteristic peak disappears from the spectrum is considered as the end of the reaction, stop the reaction, to get the release main agent;

[0021] S2, the release main agent is added to the solvent, then add 3,4-ethylenedioxythiophene, active diluent, photoinitiator, stirring, to obtain the low climbing high residual release agent.

[0022] The third aspect of the present application, a low climbing high residual release film is prepared by the following method:

[0023] The low climbing high residual release agent as described above is uniformly coated on the base film, and the UV curing is carried out to obtain the release film.

[0024] The beneficial effects of the present application are:

[0025] The organic silicon release film prepared by the present application has the characteristics of low climbing and high residual, the release coating is uniform and stable, has good weather resistance, and is more environmentally friendly, and has stable peeling effect on the adhesive tape;

[0026] The hydroxypropyl methyl silicone oil with different end-capping methods is used to synthesize the organic silicon modified polyurethane (release main agent), when the multi-molecular double end-capping is carried out, the degree of microphase separation of the polar and non-polar groups is small, under the UV curing condition, the firm chemical bond is formed between the organic silicon end chain and the diisocyanate, the uniform and dense release coating is formed, the diisocyanate is anchored on the base material, and the migration of the organic silicon end chain to the pressure sensitive adhesive surface is avoided, so that the good adhesion and residual connection are ensured.

[0027] Different from the alcohol hydroxyl double-terminated silicone oil commonly used in the market, the diol hydroxyl double-terminated silicone oil used in the present application can form a more stable crosslinked network, inhibit the migration of the organic silicon to the pressure sensitive adhesive, and maintain the peeling strength. However, the crosslinked structure cannot inhibit the migration of the polar group to the surface under the aging environment, so theoretically, the aging climbing will be higher; but the actual climbing data is not high, through analysis, it is attributed to the fact that the two free radical space distances of the dihydroxybutyl double-terminated silicone oil in the formula of the present application are closer, and the methyl styrene acid isocyanate ethyl ester is agglomerated with each other to form a star-shaped structure, which wraps the polar group, so that the polar group is difficult to migrate to the surface even under the aging condition, so that the release force does not appear the phenomenon of rapid increase. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below in conjunction with the examples, so that those skilled in the art can implement the present application with reference to the description.

[0029] It should be understood that the terms such as "have", "contain", and "include" used herein do not exclude the presence or addition of one or more other elements.

[0030] The test methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following examples are commercially available unless otherwise specified. The specific conditions are not specified in the following examples, and are carried out according to conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not specified by the manufacturer, and are conventional products that can be purchased on the market.

[0031] The present application provides a low-climbing high-residual release agent, comprising the following raw material components by weight parts:

[0032] The diol hydroxyl double-terminated silicone oil is 5-20 parts, the active diluent is 1-6 parts, the isocyanyl acrylate is 20-80 parts, the p-benzoquinone is 0.025-1 part, the catalyst is 0.01-0.04 part, the solvent is 15-60 parts, the 3,4-ethylenedioxythiophene is 0.75-3 parts, and the photoinitiator is 0.25-1 part.

[0033] In a preferred embodiment, the isocyanyl acrylate is a high-reactivity isocyanyl (meth) acrylate capping agent, specifically one or more of isocyanatoethyl methacrylate, 2-(2-isocyanatoethoxy)ethyl methacrylate, and 1,1-bis(acryloyloxymethyl)ethyl isocyanate.

[0034] In a preferred embodiment, the active diluent is dipropylene glycol diacrylate.

[0035] In a preferred embodiment, the catalyst is dibutyltin dilaurate.

[0036] In a preferred embodiment, the photoinitiator is hydroxyphenyl ketone.

[0037] The low-climbing high-residual release agent of the present application comprises the following raw material components by weight parts:

[0038] The diol hydroxyl double-terminated silicone oil is 5-20 parts, the active diluent is 1-6 parts, the isocyanyl acrylate is 20-80 parts, the p-benzoquinone is 0.025-1 part, the catalyst is 0.01-0.04 part, the solvent is 15-60 parts, the 3,4-ethylenedioxythiophene is 0.75-3 parts, and the photoinitiator is 0.25-1 part.

[0039] The low-climbing high-residual release agent of the present application comprises the following raw material components by weight parts:

[0040] Diol hydroxyl double-terminated silicone oil 10 parts, dipropylene glycol diacrylate 2 parts, 2-(2-isocyanatoethoxy)ethyl methacrylate 40 parts, p-benzoquinone 0.05 parts, dibutyltin dilaurate 0.02 parts, ethyl acetate 30 parts, 3,4-ethylenedioxythiophene 1.5 parts, hydroxyphenyl propionone 0.5 parts.

[0041] In a preferred embodiment, the low-climbing high-residual release agent comprises the following raw material components by weight parts:

[0042] Diol hydroxyl double-terminated silicone oil 10 parts, dipropylene glycol diacrylate 2 parts, 2-(2-isocyanatoethoxy)ethyl methacrylate 40 parts, p-benzoquinone 0.05 parts, dibutyltin dilaurate 0.02 parts, ethyl acetate 30 parts, 3,4-ethylenedioxythiophene 1.5 parts, hydroxyphenyl propionone 0.5 parts.

[0043] The present application also provides a preparation method of the above low-climbing high-residual release agent, comprising the following steps:

[0044] S1, the diol hydroxyl double-terminated silicone oil is placed in a reaction container, heated to 60-70℃, then p-benzoquinone, isocyanato acrylate and dibutyltin dilaurate are added in turn, stirred and reacted, the change of the characteristic peak of the -NCO functional group in the system is monitored by IR, and the reaction is considered to be completed when the characteristic peak disappears from the spectrum, and the reaction is stopped to obtain the release main agent;

[0045] S2, the obtained release main agent is added to a solvent, then 3,4-ethylenedioxythiophene, active diluent and photoinitiator are added in turn to inhibit the self-polymerization of the release agent in a hot environment, and the mixture is stirred uniformly to obtain the low-climbing high-residual release agent.

[0046] The present application also provides a low-climbing high-residual release film, which is characterized in that it is prepared by the following method:

[0047] The above low-climbing high-residual release agent is uniformly coated on a base film, and after UV curing, the release film is obtained.

[0048] The above is the general idea of the present application, and the following provides detailed examples and comparative examples based on it to further illustrate the present application.

[0049] The sources of the main raw materials involved in the following examples and comparative examples are as follows:

[0050] Diol hydroxyl double-terminated silicone oil Wuhan Lanya Bai Medicine Chemical Co., Ltd. INB-1233;

[0051] Alcohol hydroxyl double-terminated silicone oil Anhui Mingyi Silicone Co., Ltd. MY-8815;

[0052] Diol hydroxyl double-terminated silicone oil Anhui Iota Silicone Co., Ltd. IOTA8866;

[0053] Methyl styrenic acid isocyanylethyl ester Nanjing Kangmanlin Biological Medicine Technology Co., Ltd.;

[0054] 2-(2-isocyanatoethoxy)ethyl methacrylate Wuhan Huaxing Kejebio Technology Co., Ltd.;

[0055] 1,1-bis(acryloyloxymethyl)ethyl acrylate Wuhan Huaxing Kejebio Technology Co., Ltd.;

[0056] p-benzoquinone Aladdin Bio-Chem Technology Co., Ltd.;

[0057] dibutyltin dilaurate Aladdin Bio-Chem Technology Co., Ltd.;

[0058] 3,4-vinyldioxothiophene Hubei Xingyan New Material Technology Co., Ltd.;

[0059] dipropylene glycol diacrylate Jiangsu Runfeng Synthetic Technology Co., Ltd.;

[0060] hydroxyphenylpropanone Jiangsu Guangxin Photosensitive New Material Co., Ltd.

[0061] Example 1

[0062] A low-climbing high-residual release agent, the preparation method thereof comprises the following steps:

[0063] S1, 10g of diol hydroxyl double-terminated silicone oil is weighed and placed in a reaction kettle, and after the system temperature is raised to 65℃, 0.05g of p-benzoquinone, 40g of methyl styrenic acid isocyanylethyl ester and 0.02g of dibutyltin dilaurate are sequentially added to the reaction kettle; continue to stir at high speed (stirring speed is 500r / min), use IR to monitor the change of the characteristic peak of -NCO functional group in the system, and when the characteristic peak disappears from the spectrum, it is considered that the reaction is completed, and a stable yellow product is finally formed, obtaining a release main agent;

[0064] S2, the prepared release main agent is diluted with 30g of ethyl acetate to 10% solid content, and 1.5g of 3,4-vinyldioxothiophene and 2g of active diluent dipropylene glycol diacrylate are added to inhibit the self-polymerization of the release agent in the hot environment, and then 0.5g of photoinitiator hydroxyphenylpropanone is added, and a magnetic stirrer is used for mixing, to prepare a release agent.

[0065] A low-climbing high-residual release film, which is prepared by the following method:

[0066] The prepared release agent is uniformly coated on a 50 μm PET film with a wire bar, the coated sample is discharged using a fluorine release film and isolated from air, and then placed under a UV light curing machine after standing for 20 min. The UV lamp power is 80%, and the oxygen content is below 5 PPM. The release film with a glue thickness of 500 nm is prepared. The above steps need to be completed in a light-proof environment. The mechanical properties of the release film are tested after standing for 24 h.

[0067] Example 2

[0068] A low-crawling high-residual release agent, the preparation method thereof comprising the following steps:

[0069] S1, 10 g of diol hydroxyl double-terminated silicone oil is weighed and placed in a reaction kettle. After the system temperature is raised to 65°C, 0.05 g of p-benzoquinone, 40 g of 2-(2-isocyanatoethoxy) ethyl methacrylate and 0.02 g of dibutyltin dilaurate are sequentially added to the reaction kettle; continue to stir at high speed (stirring speed is 500 r / min), monitor the change of the characteristic peak of -NCO functional group in the system by IR, and the reaction is considered to be completed when the characteristic peak disappears from the spectrum. Finally, a stable yellow product is formed, and a release main agent is obtained;

[0070] S2, the prepared release main agent is diluted with 30 g of ethyl acetate to 10% solid content, and 1.5 g of 3,4-ethylenedioxythiophene and 2 g of active diluent dipropylene glycol diacrylate are added to inhibit the self-polymerization of the release agent in a hot environment. Then, 0.5 g of photoinitiator hydroxyphenylpropanone is added, and the mixture is mixed uniformly using a magnetic stirrer to prepare a release agent.

[0071] A low-crawling high-residual release film, which is prepared by the following method:

[0072] The prepared release agent is uniformly coated on a 50 μm PET film with a wire bar, the coated sample is discharged using a fluorine release film and isolated from air, and then placed under a UV light curing machine after standing for 20 min. The UV lamp power is 80%, and the oxygen content is below 5 PPM. The release film with a glue thickness of 500 nm is prepared. The above steps need to be completed in a light-proof environment. The mechanical properties of the release film are tested after standing for 24 h.

[0073] Example 3

[0074] A low-crawling high-residual release agent, the preparation method thereof comprising the following steps:

[0075] S1, 10g of diol hydroxyl double-terminated silicone oil was weighed and placed in a reaction kettle, after the system temperature was raised to 65℃, 0.05g of p-benzoquinone, 40g of 1,1-di(acryloyloxymethyl)ethyl isocyanate and 0.02g of dibutyltin dilaurate were added into the reaction kettle in turn; continue to stir at high speed (stirring speed was 500r / min), use IR to monitor the change of the characteristic peak of -NCO functional group in the system, until the characteristic peak disappears from the spectrum, it is considered that the reaction is completed, finally a stable yellow product is formed, the release main agent is obtained;

[0076] S2, the prepared release main agent was diluted with 30g of ethyl acetate to 10% solid content, and 1.5g of 3,4-ethylenedioxythiophene and 2g of active diluent dipropylene glycol diacrylate were added to inhibit the self-polymerization of the release agent in the hot environment, then 0.5g of photoinitiator hydroxyphenyl propanone was added, and the mixture was mixed evenly using a magnetic stirrer to prepare the release agent.

[0077] A low-climbing high-residual release film is prepared by the following method:

[0078] The prepared release agent was uniformly coated on a 50μm PET film with a wire bar, the coated sample was discharged and isolated from air using a fluorine release film, and then placed in a UV curing machine after standing for 20min, the UV lamp power was 80%, and the oxygen content was below 5PPM. A release film with a dry glue thickness of 500nm was prepared, and the above steps were completed in a light-proof environment. The mechanical properties of the release film were tested after standing for 24H.

[0079] Comparative Example 1

[0080] A low-climbing high-residual release agent is prepared by the following method:

[0081] S1, 10g of diol hydroxyl double-terminated silicone oil was weighed and placed in a reaction kettle, 30g of ethyl acetate was added and stirred evenly, then 1.5g of toluene diisocyanate was added after the system temperature was raised to 65℃, and stirred at high speed (stirring speed was 500r / min) for 5h to form a yellow viscous liquid; then 0.05g of p-benzoquinone was added, and 1.5g of pentaerythritol triacrylate and 0.02g of dibutyltin dilaurate were added in turn after stirring at high speed (stirring speed was 500r / min) for 20min, and the system was continued to be stirred at high speed (stirring speed was 500r / min) for 2h at 65℃ to finally form a stable yellow product, and the release main agent was obtained;

[0082] S2, the prepared release main agent was diluted with 30g of ethyl acetate to 5% solid content, and 1.5g of 3,4-ethylenedioxythiophene and 2g of active diluent pentaerythritol tetraacrylate were added to inhibit the self-polymerization of the release agent in the hot environment, then 0.5g of photoinitiator hydroxyphenyl propanone was added, and the mixture was mixed evenly using a magnetic stirrer to prepare the release agent.

[0083] A low-climbing high-residual release film is prepared by the following method:

[0084] The prepared release agent is uniformly coated on a 50 pm PET film with a wire bar, the coated sample is discharged and air is isolated using a fluorine release film, and then placed under a UV light curing machine after standing for 20 min. The UV lamp power is 80%, and the oxygen content is below 5 PPM. A release film with a dry film thickness of 500 nm is prepared. The above steps need to be completed in a light-proof environment. The mechanical properties of the release film are tested after standing for 24 h.

[0085] Comparative Example 2

[0086] A low-climbing high-residual release agent is prepared by the following method:

[0087] S1, 10 g of alcohol hydroxyl double-terminated silicone oil is placed in a reaction kettle, and then 0.05 g of p-benzoquinone, 40 g of methyl styrene acid isocyanide ethyl ester and 0.02 g of dibutyltin dilaurate are added into the reaction kettle in turn after the system temperature is raised to 65°C; continue to stir at high speed (stirring speed is 500 r / min), and use IR to monitor the change of the characteristic peak of -NCO functional group in the system. When the characteristic peak disappears from the spectrum, it is considered that the reaction is completed, and a stable yellow product is finally formed, obtaining a release main agent;

[0088] S2, the prepared release main agent is diluted with 30 g of ethyl acetate to 5% solid content, and 1.5 g of 3,4-ethylenedioxythiophene and 2 g of active diluent dipropylene glycol diacrylate are added to inhibit the self-polymerization of the release agent in a hot environment, and then 0.5 g of photoinitiator hydroxyphenyl propionone is added, and the mixture is mixed uniformly using a magnetic stirrer, to prepare a release agent.

[0089] A low-climbing high-residual release film is prepared by the following method:

[0090] The prepared release agent is uniformly coated on a 50 pm PET film with a wire bar, the coated sample is discharged and air is isolated using a fluorine release film, and then placed under a UV light curing machine after standing for 20 min. The UV lamp power is 80%, and the oxygen content is below 5 PPM. A release film with a dry film thickness of 500 nm is prepared. The above steps need to be completed in a light-proof environment. The mechanical properties of the release film are tested after standing for 24 h.

[0091] Comparative Example 3

[0092] A low-climbing high-residual release agent is prepared by the following method:

[0093] S1, 10 g of diol hydroxyl mono-terminated silicone oil was placed in a reaction kettle, and after the system temperature was raised to 65°C, 0.05 g of p-benzoquinone, 40 g of methyl styrene acid isocyanide ethyl and 0.02 g of dibutyl tin dilaurate were added into the reaction kettle in turn; continue to stir at high speed (stirring speed is 500 r / min), use IR to monitor the change of the characteristic peak of -NCO functional group in the system, and when the characteristic peak disappears from the spectrum, it is considered that the reaction is completed, and a stable yellow product is finally formed, obtaining a release main agent;

[0094] S2, the prepared release main agent was diluted with 30 g of ethyl acetate to 5% solid content, and 1.5 g of 3,4-ethylenedioxythiophene and 2 g of active diluent dipropylene glycol diacrylate were added to inhibit the self-polymerization of the release agent in the hot environment, and 0.5 g of photoinitiator hydroxyphenyl propionone was added, and a magnetic stirrer was used to mix evenly, to prepare a release agent.

[0095] A low-crawling high-residual release film is prepared by the following method:

[0096] The prepared release agent was uniformly coated on a 50 μm PET film with a wire bar, the coated sample was discharged and air was isolated using a fluorine release film, and after standing for 20 min, it was placed under a UV curing machine for curing, the UV lamp power was 80%, and the oxygen content was below 5 PPM. The dry adhesive thickness of the release film prepared was 500 nm. The above steps need to be completed in a light-proof environment. After standing for 24 h, the mechanical properties of the release film were tested.

[0097] The release films prepared in Examples 1-3 and Comparative Examples 1-3 were tested for the following properties:

[0098] 1, 20 min, 24H test method: standard adhesive tape TESA7475 was attached to the release surface, and a 2 kg roller was rolled back and forth twice (300 mm / min), then placed at room temperature (23±2℃, relative humidity 50%) for 20 min, 24H, then tested with a universal tensile testing machine at 300 mm / min for 180° peeling, tested 3 times, and the average value was taken as the release force of 20 min, 24H

[0099] 2, test method: standard adhesive tape TESA7475 was attached to the release surface, and a 2 kg roller was rolled back and forth twice (300 mm / min), then placed in a 55°C oven, aged for 20H, then taken out and placed at room temperature for 2h, then tested with a universal tensile testing machine at 300 mm / min for 180° peeling, tested 3 times, and the average value was taken.

[0100] 4. Residual test method: standard adhesive tape Nittobo 31B is attached to the release surface, rolled back and forth twice with a 2kg roller (300mm / min), then placed in a 55°C oven, aged for 20H, then removed and placed at room temperature for 2h, the Nittobo 31B on the test sample is peeled off and attached to a standard steel plate, rolled back and forth twice with a 2kg roller, left to stand for 20min, then the peel force is tested, recorded as Al. Standard adhesive tape Nittobo 31B is attached to the release standard steel plate, rolled back and forth twice with a 2kg roller (300mm / min), left to stand for 20min, then the peel force is tested, recorded as A2. Residual SA% = (Al / A2) x 100%

[0101] 5. Performance evaluation (evaluation index is the comprehensive performance of residual and aging climb, residual greater than 85% and residual climb less than 20g is excellent)

[0102] The test results are shown in Table 1 below:

[0103] Table 1

[0104] According to the test results in Table 1, it can be seen that the release film of Examples 1-3 has the characteristics of low climb and high residual, mainly due to the synthesis of silicone-modified polyurethane of diol hydroxyl double-terminated silicone oil and isocyanophenyl acid ester under UV curing conditions, which can avoid environmental hazards of organic solvents, while ensuring high residual and low aging release force climb.

[0105] According to the comparison of the results of the examples and the comparative examples, it can be shown that the silicone-modified polyurethane synthesized by diol hydroxyl double-terminated silicone oil and active isocyanophenyl acid has higher residual and lower aging climb compared with the silicone-modified polyurethane using ordinary alcohol hydroxyl double-terminated silicone oil and diol hydroxyl single-terminated silicone oil as the reaction substrate.

[0106] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore the present application is not limited to specific details, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A low-crawling high-residual release agent characterized by, The following raw material components by weight parts are included: The isocyanyl acrylate is one or several of isocyanatoethyl methacrylate, 2-(2-isocyanatoethoxy)ethyl methacrylate and 1,1-bis(acryloyloxymethyl)ethyl isocyanate.

2. The low climb high residual release agent of claim 1, wherein, The active diluent is dipropylene glycol diacrylate.

3. The low climb high residual release agent of claim 1, wherein, The catalyst is dibutyl tin dilaurate.

4. The low climb high residual release agent of claim 1, wherein, The photoinitiator is hydroxyphenyl ketone.

5. The low climb high residual release agent of claim 1, wherein, The following raw material components by weight parts are included:

6. The low climb high residual release agent of claim 1, wherein, The isocyanyl acrylate is one or several of isocyanatoethyl methacrylate, 2-(2-isocyanatoethoxy)ethyl methacrylate and 1,1-bis(acryloyloxymethyl)ethyl isocyanate. The active diluent is dipropylene glycol diacrylate.

7. The low climb high residual release agent of claim 1, wherein, The catalyst is dibutyl tin dilaurate. The photoinitiator is hydroxyphenyl ketone.

8. The low climb high residual release agent of claim 1, wherein, The following raw material components by weight parts are included: The isocyanyl acrylate is one or several of isocyanatoethyl methacrylate, 2-(2-isocyanatoethoxy)ethyl methacrylate and 1,1-bis(acryloyloxymethyl)ethyl isocyanate.

9. A method of preparing a low climb high residue release agent as claimed in any one of claims 1 to 8, characterised in that, The active diluent is dipropylene glycol diacrylate. The catalyst is dibutyl tin dilaurate. The photoinitiator is hydroxyphenyl ketone.

10. A low-climbing high-residual release film, characterized by, The following raw material components by weight parts are included: The isocyanyl acrylate is one or several of isocyanatoethyl methacrylate, 2-(2-isocyanatoethoxy)ethyl methacrylate and 1,1-bis(acryloyloxymethyl)ethyl isocyanate. The active diluent is dipropylene glycol diacrylate. The catalyst is dibutyl tin dilaurate. The photoinitiator is hydroxyphenyl ketone. The following steps are included: S1, the diol hydroxyl double-terminated silicone oil is placed in a reaction container, heated to 60-70℃, then p-benzoquinone, isocyanyl acrylate and dibutyl tin dilaurate are added in turn, stirred and reacted, the change of the characteristic peak of -NCO functional group in the system is monitored by IR, and the reaction is considered to be completed when the characteristic peak disappears from the spectrum, the reaction is stopped, and the release agent is obtained; S2, the obtained release agent is added to the solvent, then 3,4-ethylenedioxythiophene, active diluent and photoinitiator are added, stirred uniformly, and the low-climbing high-residual release agent is obtained. It is prepared by the following method: The low-climbing high-residual release agent as claimed in any one of claims 1-8 is uniformly coated on the base film, and after UV curing, the release film is obtained.

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