CN114752347A - UV-Pt dual-curing system organic silicon liquid optical transparent adhesive as well as preparation method and application thereof - Google Patents
UV-Pt dual-curing system organic silicon liquid optical transparent adhesive as well as preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
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- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
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Abstract
The invention is applicable to the technical field of optically transparent glue, and provides UV-Pt dual-curing system organic silicon liquid optically transparent glue as well as a preparation method and application thereof, wherein the UV-Pt dual-curing system organic silicon liquid optically transparent glue comprises the following components in parts by weight: 50-80 parts of UV-Pt dual-curing prepolymer, 5-20 parts of vinyl MQ silicon resin, 1-10 parts of hydrogen-containing MQ silicon resin, 4-40 parts of vinyl-terminated silicone oil, 0.5-3% of photoinitiator, 0.005-0.5 part of inhibitor, 0.1-2 parts of adhesion promoter, 0.2-4 parts of hydrogen-containing silicone oil and 0.005-0.5 part of platinum catalyst; the organic silicon liquid optical transparent adhesive can be simultaneously subjected to ultraviolet curing and normal-temperature and heating curing, so that the flexibility of a customer process is improved, and the batch production time is shortened. Meanwhile, the optical transparent adhesive has excellent impact resistance and bending resistance, excellent high temperature, high humidity and yellowing resistance and extremely small volume shrinkage after being cured, solves the problem of yellow edge of a display screen, and improves the quality of products.
Description
Technical Field
The invention belongs to the technical field of optically transparent glue, and particularly relates to UV-Pt dual-curing system organic silicon liquid optically transparent glue as well as a preparation method and application thereof.
Background
Compared with the frame pasting technology which causes air to be left between the touch layer and the display layer, the full pasting technology fills the air layer between the touch screen and the display panel with liquid glue or optical glue, and pastes the panel and the touch screen together in a seamless mode. Has the following advantages: the screen gap is prevented from entering dust or water vapor; two interfaces between the air layer and the touch screen and between the air layer and the display panel are eliminated, reflection of light is greatly reduced, loss of the light which is transmitted out is reduced, and therefore brightness is improved, and the display effect of the screen is enhanced; the bonding strength between the touch screen and the display panel is enhanced; the interference of noise to the touch signal is reduced, and the smooth touch operation feeling is improved; the thickness of the display module is reduced, so that the machine body is thinner, and the technology is increasingly applied to electronic products such as smart phones, tablet computers and notebook computers.
The optical transparent adhesive products commonly used in the market are still mainly acrylic products, and the acrylic products have the advantages of high curing speed, good adhesion and the like, but have the following defects when used in medium-size and large-size products: 1. the weather resistance is poor, and yellow spots, light spots or cracking phenomena are easily generated after long-term use in the light or damp-heat environment; 2. the volume shrinkage is large and is generally more than 2 percent; 3. the ITO layer has certain corrosivity, and the sensitivity and accuracy of screen touch are influenced.
Compared with the traditional acrylic acid and rubber type materials, the organic silicon chemical structure has the characteristics of high bond length, bond angle, bond energy, low surface tension, low energy required by rotation and the like, has excellent high and low temperature resistance, and can be used for a long time under a harsh environment (minus 50-150 ℃); the coating has good wetting, spreading and bonding properties on low surface energy materials such as fluorine-containing and silicon-containing surfaces; excellent chemical resistance, insulation and dielectric properties; the performance advantage of the organic silicon optical transparent adhesive enables the organic silicon optical transparent adhesive and the laminating scheme thereof to have better application prospect and be accepted by more and more manufacturers.
The traditional platinum-catalyzed hydrosilylation-type organic silicon pressure-sensitive adhesive has low cohesive force, is difficult to balance strength and toughness and simultaneously obtains high adhesive force, and cannot meet the requirements of products for optical lamination. The existing curing conditions of the heat curing type organic silicon optical transparent glue limit the process and the yield of customers.
Disclosure of Invention
The invention provides an organic silicon liquid optical transparent adhesive of a UV-Pt dual-curing system, a preparation method and application thereof, and aims to provide the organic silicon liquid optical transparent adhesive of the UV-Pt dual-curing system, which is fast cured by UV to form strength and cured after Pt catalysis. Adding silicone resin to improve cohesive strength, and adding adhesion promoter to improve adhesion. The preparation process is simple and easy to realize industrial production.
The invention is realized in such a way that the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive comprises the following components:
the UV-Pt dual-curing prepolymer comprises a UV-Pt dual-curing prepolymer, vinyl MQ silicon resin, hydrogen-containing MQ silicon resin, terminal vinyl silicone oil, a photoinitiator, an inhibitor, an adhesion promoter, hydrogen-containing silicone oil and a platinum catalyst;
wherein, the components are as follows according to the parts by weight: 50-80 parts of UV-Pt dual-curing prepolymer, 5-20 parts of vinyl MQ silicon resin, 1-10 parts of hydrogen-containing MQ silicon resin, 4-40 parts of vinyl-terminated silicone oil, 0.5-3% of photoinitiator, 0.005-0.5 part of inhibitor, 0.1-2 parts of adhesion promoter, 1-4 parts of hydrogen-containing silicone oil and 0.005-0.5 part of platinum catalyst;
the UV-Pt dual-curing prepolymer has the following structural formula:
wherein R1 is one of-OCH 3, -OC2H5 or-OC 3H7, R2 is CH2 ═ CH-COO-C3H 6-or CH2 ═ C (CH3) -COO-C3H6-, m is an integer of 1-10, and n is an integer of 30-300.
Preferably, the M/Q ratio of the vinyl MQ silicon resin is 0.5-0.9, the vinyl mass fraction is 1.5-3%, and the number average molecular weight is 3500-6500;
the M/Q ratio of the hydrogen-containing MQ silicon resin is 0.5-0.9, and the number average molecular weight is 3000-6000.
Preferably, the vinyl-terminated silicone oil is vinyl-terminated polydimethylsiloxane, and the viscosity is 500-60000.
Preferably, the photoinitiator is one of 2-hydroxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone and 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone.
Preferably, the inhibitor is any one or a combination of several of tetramethyl divinyl disiloxane, tetramethyl tetravinyl cyclo tetrasiloxane, pentamethyl pentavinyl cyclo pentasiloxane, methyl butynol, ethynyl cyclohexanol, maleic anhydride, diallyl maleate, diethyl maleate and diisooctyl maleate.
Preferably, the viscosity of the adhesion promoter is 20-1000 cP, and the adhesion promoter is any one or a combination of epoxy propoxy propyl modified polydimethyl methyl vinyl siloxane and epoxy cyclohexyl modified polydimethyl methyl vinyl siloxane.
Preferably, the hydrogen-containing silicone oil is any one or a combination of several of trimethyl end-capped polymethylhydrosiloxane, trimethyl end-capped polydimethylsiloxane and hydrosilicon end-capped polydimethylsiloxane, the viscosity is 5-250 cP, and the mass fraction of hydrogen is 0.1-1.6%.
Preferably, the platinum catalyst is a Karster catalyst, the viscosity is 400-600 cP, and the platinum content is 5000 ppm.
The method for preparing the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive comprises the following steps:
s1: adding dimethyl alkoxy silane and methyl vinyl alkoxy silane into a reactor to perform hydrolytic condensation reaction under the action of a catalyst, adding an end capping reagent to perform condensation reaction, adding a neutralizing agent to neutralize and remove low temperature, and obtaining a UV-Pt dual-curing prepolymer;
s2: weighing a certain amount of UV-Pt dual-curing prepolymer and vinyl-terminated silicone oil according to the formula proportion, and adding the UV-Pt dual-curing prepolymer and the vinyl-terminated silicone oil into a stirrer;
s3: stirring and cooling, weighing and adding vinyl MQ silicon resin, hydrogen-containing MQ silicon resin, photoinitiator, inhibitor, adhesion promoter and hydrogen-containing silicone oil, and stirring to uniformly mix the materials;
s4: weighing and adding a platinum catalyst, and stirring to uniformly mix the platinum catalyst and the platinum catalyst;
s5: and (5) defoaming in vacuum and packaging.
The application of the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive is applied to PC display modules, vehicle-mounted display modules and mobile phone display modules.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a UV-Pt dual-curing system organic silicon liquid optical transparent adhesive as well as a preparation method and application thereof, wherein the preparation method comprises the following steps:
the optical transparent adhesive is quickly cured to form strength under UV irradiation by synthesizing a UV prepolymer with a side chain containing a vinyl group, and then cured after Pt catalysis. The cohesive strength is improved by adding the silicone resin, the adhesive force is improved by adding the adhesion promoter, and the strength and the toughness of the product are adjusted by adding and adjusting the dosage of the vinyl-terminated silicone oil, the silicone resin and the cross-linking agent. The preparation process is simple and easy to realize industrial production.
On the other hand, the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive is applied to the fields of PC display modules, vehicle-mounted display modules, mobile phone display modules and the like.
After the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive prepared by the formula is cured, the hardness is Shore 0020-60, the volume shrinkage rate is less than 0.5%, the visible light transmittance is more than 98.5%, the haze is less than 0.05, and the glass/PET 180-degree drawing force is more than 600 g/cm.
Drawings
FIG. 1 is a flow chart of the preparation of the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive in the present invention;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the present invention provides a technical solution,
the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive needs to use the following materials during production and preparation; the method comprises the following steps:
the UV-Pt dual-curing prepolymer comprises a UV-Pt dual-curing prepolymer, vinyl MQ silicon resin, hydrogen-containing MQ silicon resin, terminal vinyl silicone oil, a photoinitiator, an inhibitor, an adhesion promoter, hydrogen-containing silicone oil and a platinum catalyst; the components are as follows by weight: 50-80 parts of UV-Pt dual-curing prepolymer, 5-20 parts of vinyl MQ silicon resin, 1-10 parts of hydrogen-containing MQ silicon resin, 4-40 parts of vinyl-terminated silicone oil, 0.5-3% of photoinitiator, 0.005-0.5 part of inhibitor, 0.1-2 parts of adhesion promoter, 1-4 parts of hydrogen-containing silicone oil and 0.005-0.5 part of platinum catalyst;
the UV-Pt dual-curing prepolymer has the following structural formula:
wherein R1 is one of-OCH 3, -OC2H5 or-OC 3H7, R2 is CH2 ═ CH-COO-C3H 6-or CH2 ═ C (CH3) -COO-C3H6-, m is an integer of 1-10, and n is an integer of 30-300.
The preparation method of the UV-Pt dual-curing prepolymer comprises the steps of carrying out hydrolysis condensation reaction on dimethyl alkoxy silane and methyl vinyl alkoxy silane under the action of a catalyst, adding a blocking agent for condensation blocking, adding a neutralizing agent for neutralization, and removing low boiling point in vacuum.
Wherein, the dimethyl alkoxy silane is one or a combination of several of dimethyl dimethoxy silane and dimethyl diethoxy silane, preferably dimethyl dimethoxy silane;
the methylvinylalkoxysilane is one or a combination of several of methylvinyldimethoxysilane and methylvinyldiethoxysilane, preferably methylvinyldimethoxysilane.
The catalyst is one or a combination of several of sodium hydroxide, potassium hydroxide, tetramethylammonium hydroxide, alkali glue and potassium dihydrogen phosphate, preferably potassium hydroxide, and the addition amount of the catalyst is preferably 0.01-1.5% of the amount of the silane.
The blocking agent is acryloxypropyltrimethoxysilane, methacryloxypropyltrimethoxysilane, acryloxypropyltriethoxysilane, methacryloxypropyltriethoxysilane, methacryloxypropyltripropoxysilane, preferably acryloxypropyltrimethoxysilane.
The neutralizer is one or more of stearic acid, carbon dioxide gas and dry ice, and preferably the dry ice.
The preparation method of the UV-Pt dual-curing prepolymer comprises the following steps:
the method comprises the following steps: adding a certain amount of water, potassium hydroxide, dimethyl dimethoxy silane and methyl vinyl dimethoxy silane into a reactor;
step two: reacting for 3-5 h at 60-90 ℃, and removing low boiling point in vacuum;
step three: adding acryloxypropyltrimethoxysilane into the product;
step four: reacting for 1-4 h at 80-110 ℃ under the protection of nitrogen;
step five: cooling to 60 ℃, adding dry ice for neutralization for 1 hour;
step six: heating to 130 ℃, and removing low boiling in vacuum to obtain the product UV-Pt dual-curing prepolymer.
The present invention is described in detail below with reference to examples, and the description in this section is only for illustrating and explaining the present invention and does not limit the present invention in any way.
Four examples are set forth below to illustrate how and the process steps for preparing dual-cure prepolymers, respectively:
the first preparation method comprises the following steps: UV-Pt dual-curing prepolymer 1:
1)300g of dimethyldimethoxysilane, 33g of methylvinyldimethoxysilane, 91.5g of water and 0.11g of KOH were reacted at 60 ℃ for 4 h;
2) removing low boiling point in vacuum;
3) to the product was added 48.1g of acryloxypropyltrimethoxysilane;
4) reacting for 2 hours at 90 ℃ under the protection of nitrogen;
5) cooling to 60 ℃, and adding dry ice for neutralization for 1 h;
6) heating to 130 ℃, and removing low boiling in vacuum to obtain the product UV-Pt dual-curing prepolymer 1.
The second preparation method comprises the following steps: UV-Pt dual-cure prepolymer 2:
1)480g of dimethyldimethoxysilane, 66g of methylvinyldimethoxysilane, 153g of water and 0.23g of KOH were reacted at 60 ℃ for 4 h;
2) removing low boiling point in vacuum;
3) to the product was added 48.3g of acryloxypropyltrimethoxysilane;
4) reacting for 2 hours at 90 ℃ under the protection of nitrogen;
5) cooling to 60 ℃, and adding dry ice for neutralization for 1 h;
6) heating to 130 ℃, and removing low boiling in vacuum to obtain the product UV-Pt dual-curing prepolymer 2.
The third preparation method comprises the following steps: UV-Pt dual-curing prepolymer 3:
1)510g of dimethyldimethoxysilane, 46.2g of methylvinyldimethoxysilane, 150.6g of water and 0.26g of KOH were reacted at 60 ℃ for 4 h;
2) removing low boiling point in vacuum;
3) to the product was added 23.7g of acryloxypropyltrimethoxysilane;
4) reacting for 2 hours at 90 ℃ under the protection of nitrogen;
5) cooling to 60 ℃, adding dry ice for neutralization for 1 h;
6) heating to 130 ℃, and removing low boiling in vacuum to obtain the product UV-Pt dual-curing prepolymer 3.
The fourth preparation method comprises the following steps: UV-Pt dual-curing prepolymer 4:
1)532g of dimethyldimethoxysilane, 37.4g of methylvinyldimethoxysilane, 151.7g of water and 0.30g of KOH were reacted at 60 ℃ for 4 h;
2) removing low boiling point in vacuum;
3) 15.9g of acryloyloxypropyltrimethoxysilane was added to the product;
4) reacting for 2 hours at 90 ℃ under the protection of nitrogen;
5) cooling to 60 ℃, and adding dry ice for neutralization for 1 h;
6) heating to 130 ℃, and removing low boiling in vacuum to obtain the product UV-Pt dual-curing prepolymer 4.
In addition, in other components of the embodiment, the M/Q ratio of the vinyl MQ silicon resin is 0.5-0.9, the mass fraction of vinyl is 1.5-3%, and the number average molecular weight is 3500-6500; the M/Q ratio of the hydrogen-containing MQ silicon resin is 0.5-0.9, and the number average molecular weight is 3000-6000; the vinyl-terminated silicone oil is vinyl-terminated polydimethylsiloxane, and the viscosity is 500-60000.
The photoinitiator is one of 2-hydroxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone and 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone.
The inhibitor is any one or a combination of several of tetramethyl divinyl disiloxane, tetramethyl tetravinyl cyclotetrasiloxane, pentamethyl pentavinyl cyclopentasiloxane, methyl butynol, ethynyl cyclohexanol, maleic anhydride, diallyl maleate, diethyl maleate and diisooctyl maleate.
The viscosity of the adhesion promoter is 20-1000 cP, the adhesion promoter is any one or a combination of more of glycidoxypropyl modified polydimethylmethylvinylsiloxane and epoxycyclohexyl modified polydimethylmethylvinylsiloxane, and the selected adhesion promoter is preferably glycidoxypropyl modified polydimethylmethylvinylsiloxane.
The hydrogen-containing silicone oil is any one or a combination of trimethyl end-capped polymethylhydrosiloxane, trimethyl end-capped polydimethylsiloxane and silicon hydrogen end-capped polydimethylsiloxane, the viscosity is 5-250 cP, and the mass fraction of hydrogen is 0.1-1.6%.
The platinum catalyst is a Kanster catalyst, the viscosity is 400-600 cP, and the platinum content is 5000 ppm.
When the UV-Pt dual-curing system organic silicon liquid optical transparent adhesive is prepared, the following steps are required to be carried out; the method specifically comprises the following steps: comprises the following steps:
s1: weighing a certain amount of UV-Pt dual-curing prepolymer and vinyl-terminated silicone oil according to the formula proportion, and adding the UV-Pt dual-curing prepolymer and the vinyl-terminated silicone oil into a stirrer;
s2: stirring and cooling, weighing and adding vinyl MQ silicon resin, hydrogen-containing MQ silicon resin, photoinitiator, inhibitor, adhesion promoter and hydrogen-containing silicone oil, and stirring to uniformly mix the materials;
s3: weighing and adding a platinum catalyst, and stirring to uniformly mix the platinum catalyst and the platinum catalyst;
s4: and (5) defoaming in vacuum and packaging.
The present invention is described in detail below with reference to examples, and the description in this section is only for illustrating and explaining the present invention and does not limit the present invention in any way.
The following is the preparation of a dual cure system silicone liquid optical clear adhesive, which is illustrated by four examples and one comparative example:
example 1
S1: 73g of UV-Pt dual-curing prepolymer 1, 6g of vinyl-terminated silicone oil (prepared by the first preparation method) is added into a stirrer;
s2: starting stirring at 700RPM and cooling water, adding 6g of vinyl MQ silicon resin, 10g of hydrogen-containing MQ silicon resin, 2g of photoinitiator, 0.05g of inhibitor, 1g of adhesion promoter and 3g of hydrogen-containing silicone oil, and uniformly stirring;
s3: controlling the temperature to be 15-35 ℃, weighing and adding 0.25g of platinum catalyst, and uniformly stirring;
s4: and (5) defoaming in vacuum and packaging.
Example 2
S1: 70g of UV-Pt dual-curing prepolymer (prepared by the second preparation method) 2, 9g of vinyl-terminated silicone oil are added into a stirrer;
s2: starting stirring at 700RPM and cooling water, adding 6g of vinyl MQ silicon resin, 15g of hydrogen-containing MQ silicon resin, 2g of photoinitiator, 0.05g of inhibitor, 1g of adhesion promoter and 3g of hydrogen-containing silicone oil, and uniformly stirring;
s3: controlling the temperature to be 15-35 ℃, weighing and adding 0.25g of platinum catalyst, and uniformly stirring;
s4: and (5) defoaming in vacuum and packaging.
Example 3
S1: 65g of UV-Pt dual-curing prepolymer (prepared by the third preparation method) 3 and 14g of vinyl-terminated silicone oil are added into a stirrer;
s2: starting stirring at 700RPM and cooling water, adding 10g of vinyl MQ silicon resin, 10g of hydrogen-containing MQ silicon resin, 2g of photoinitiator, 0.05g of inhibitor, 1g of adhesion promoter and 3g of hydrogen-containing silicone oil, and uniformly stirring;
s3: controlling the temperature to be 15-35 ℃, weighing and adding 0.25g of platinum catalyst, and uniformly stirring;
s4: and (5) defoaming in vacuum and packaging.
Example 4
S1: 60g of UV-Pt dual-curing prepolymer (prepared by the fourth preparation method) 4 and 15g of vinyl-terminated silicone oil were charged into a stirrer.
S2: starting stirring at 700RPM and cooling water, adding 12g of vinyl MQ silicon resin, 8g of hydrogen-containing MQ silicon resin, 2g of photoinitiator, 0.05g of inhibitor, 1g of adhesion promoter and 2g of hydrogen-containing silicone oil, and uniformly stirring;
s3: controlling the temperature to be 15-35 ℃, weighing and adding 0.25g of platinum catalyst, and uniformly stirring;
s4: and (5) defoaming in vacuum and packaging.
Comparative example
S1: 40g of xylene and 37.5g of methyl MQ resin are added into a stirrer;
s2: starting stirring at 700RPM, adding 22.5g of vinyl-terminated polydimethylmethylvinyl raw rubber, and stirring for 4h until the raw rubber is completely dissolved;
s3: 0.15g of inhibitor, 0.5g of adhesion promoter, 0.2g of hydrogen-containing silicone oil and 1g of platinum catalyst are added and stirred uniformly.
The test performance data of the silicone pressure-sensitive adhesive prepared in the above examples and comparative examples are shown in the following table:
comparison of the properties between examples 1 to 4 and comparative example:
as can be seen from the table, the UV-Pt dual-curing prepolymer is synthesized and used, and MQ resin, vinyl-terminated silicone oil, hydrogen-containing silicone oil and adhesion promoter are added to adjust the viscosity, hardness, drawing force and adhesiveness of the product, so that the prepared UV-Pt dual-curing system organic silicon liquid optical transparent adhesive forms strength under UV illumination, the cohesion strength is improved by post-curing at normal temperature and under heating, the hardness, drawing force and light transmittance after curing are all higher than those of common organic silicon pressure-sensitive adhesives, and the haze is lower than that of common organic silicon pressure-sensitive adhesives.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
- The UV-Pt dual-curing system organic silicon liquid optical transparent adhesive is characterized by comprising the following components:the UV-Pt dual-curing prepolymer comprises a UV-Pt dual-curing prepolymer, vinyl MQ silicon resin, hydrogen-containing MQ silicon resin, terminal vinyl silicone oil, a photoinitiator, an inhibitor, an adhesion promoter, hydrogen-containing silicone oil and a platinum catalyst;wherein, the components are as follows according to the weight portion: 50-80 parts of UV-Pt dual-curing prepolymer, 5-20 parts of vinyl MQ silicon resin, 1-10 parts of hydrogen-containing MQ silicon resin, 4-40 parts of vinyl-terminated silicone oil, 0.5-3% of photoinitiator, 0.005-0.5 part of inhibitor, 0.1-2 parts of adhesion promoter, 1-4 parts of hydrogen-containing silicone oil and 0.005-0.5 part of platinum catalyst;the UV-Pt dual-curing prepolymer has the following structural formula:
wherein R1 is one of-OCH 3, -OC2H5 or-OC 3H7, R2 is CH2 ═ CH-COO-C3H 6-or CH2 ═ C (CH3) -COO-C3H6-, m is an integer of 1-10, and n is an integer of 30-300. - 2. The UV-Pt dual-curing system organic silicon liquid optical clear adhesive according to claim 1, wherein the M/Q ratio of the vinyl MQ silicon resin is 0.5-0.9, the vinyl mass fraction is 1.5-3%, and the number average molecular weight is 3500-6500;the M/Q ratio of the hydrogen-containing MQ silicon resin is 0.5-0.9, and the number average molecular weight is 3000-6000.
- 3. The UV-Pt dual-curing system organic silicon liquid optical clear adhesive as claimed in claim 1, wherein the vinyl-terminated silicone oil is vinyl-terminated polydimethylsiloxane, and the viscosity is 500-60000.
- 4. The UV-Pt dual cure system silicone liquid optical clear adhesive according to claim 1, wherein the photoinitiator is one of 2-hydroxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexyl phenyl ketone, and 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone.
- 5. The UV-Pt dual cure system silicone liquid optical clear adhesive according to claim 1, wherein said inhibitor is any one or a combination of tetramethyl divinyl disiloxane, tetramethyl tetravinyl cyclo tetrasiloxane, pentamethyl pentavinyl cyclo pentasiloxane, methyl butynol, ethynyl cyclohexanol, maleic anhydride, diallyl maleate, diethyl maleate, and diisooctyl maleate.
- 6. The UV-Pt dual-curing system organic silicon liquid optical clear adhesive as claimed in claim 1, wherein the viscosity of the adhesion promoter is 20-1000 cP, and the adhesion promoter is any one or a combination of more of glycidoxypropyl modified polydimethyl methyl vinyl siloxane and epoxycyclohexyl modified polydimethyl methyl vinyl siloxane.
- 7. The UV-Pt dual-curing system organic silicon liquid optical clear adhesive according to claim 1, wherein the hydrogen-containing silicone oil is any one or a combination of trimethyl-terminated polymethylhydrosiloxane, trimethyl-terminated polydimethylmethylhydrogensiloxane and hydrosilyl-terminated polydimethylsiloxane, the viscosity is 5-250 cP, and the mass fraction of hydrogen is 0.1-1.6%.
- 8. The UV-Pt dual cure system silicone liquid optical clear adhesive according to claim 1, wherein the platinum catalyst is a Kanst catalyst, the viscosity is 400-600 cP, and the platinum content is 5000 ppm.
- 9. The method for preparing the UV-Pt dual-curing system organic silicon liquid optical clear adhesive as defined in any one of claims 1-8, which comprises the following steps:s1: adding dimethyl alkoxy silane and methyl vinyl alkoxy silane into a reactor to perform hydrolytic condensation reaction under the action of a catalyst, adding a capping agent to perform condensation reaction, adding a neutralizing agent to neutralize and remove low temperature to obtain a UV-Pt dual-curing prepolymer;s2: weighing a certain amount of UV-Pt dual-curing prepolymer and vinyl-terminated silicone oil according to the formula proportion, and adding into a stirrer;s3: stirring and cooling, weighing and adding the vinyl MQ silicon resin, the hydrogen-containing MQ silicon resin, the photoinitiator, the inhibitor, the adhesion promoter and the hydrogen-containing silicone oil, and stirring to uniformly mix the materials;s4: weighing and adding a platinum catalyst, and stirring to uniformly mix the platinum catalyst and the platinum catalyst;s5: and (5) defoaming in vacuum and packaging.
- 10. The application of the UV-Pt dual-curing system organic silicon liquid optical clear adhesive as claimed in any one of claims 1 to 8, wherein the optical clear adhesive is applied to a PC display module, a vehicle-mounted display module and a mobile phone display module.
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| CN202210533653.0A CN114752347A (en) | 2022-05-16 | 2022-05-16 | UV-Pt dual-curing system organic silicon liquid optical transparent adhesive as well as preparation method and application thereof |
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