CN113322028B - anti-UV OCA optical adhesive and preparation method thereof - Google Patents
anti-UV OCA optical adhesive and preparation method thereof Download PDFInfo
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- CN113322028B CN113322028B CN202110648295.3A CN202110648295A CN113322028B CN 113322028 B CN113322028 B CN 113322028B CN 202110648295 A CN202110648295 A CN 202110648295A CN 113322028 B CN113322028 B CN 113322028B
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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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
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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
- C09J2433/00—Presence of (meth)acrylic polymer
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention discloses an anti-UV OCA optical adhesive which comprises the following raw materials in parts by mass: 10-60 parts of acrylic pressure-sensitive adhesive, 0.1-1 part of ultraviolet absorbent, 0.001-0.1 part of curing agent and 30-80 parts of solvent; the ultraviolet absorbent is 2- (2 '-hydroxy-5' -heptyl phenyl) benzotriazole. The invention also discloses an anti-UV OCA optical adhesive film which is obtained by sequentially coating and curing the anti-UV OCA optical adhesive. The OCA optical adhesive disclosed by the invention has an excellent anti-ultraviolet effect, and the curing degree of the formed optical adhesive film can reach 100%, so that the OCA optical adhesive film has an excellent anti-UV effect on the basis of complete curing of the adhesive layer.
Description
Technical Field
The invention relates to the technical field of OCA (optically clear adhesive) optical cement, in particular to an anti-UV OCA optical cement and a preparation method thereof.
Background
The OCA optical adhesive is a special double-sided adhesive with optical transparency and no base material, is used for cementing transparent optical elements, has the characteristics of colorless transparency, light transmittance of over 90 percent, good cementing strength, capability of being cured at room temperature or intermediate temperature, small curing shrinkage and the like, and is one of the raw materials of important touch screens. OCA optical cement can be applied to different fields according to different thicknesses, and the main application is as follows: the special adhesive for gluing transparent optical elements (such as lenses) is used for gluing electronic paper, transparent device bonding, projection screen assembly, aerospace or military optical device assembly, display assembly, lens assembly, resistive touch screens G + F + F and F + F, capacitive touch screens, panels, ICON, glass, polycarbonate and other plastic materials. Various films, screens (acrylic, glass screens, touch screens, etc.) suitable for fixing the display periphery of mobile machines.
At present, OCA optical cement is generally molded by photocuring in production, the problem of incomplete curing is often caused in production due to large thickness of a glue layer, and the UV aging resistance of the OCA optical cement is often lower and is easy to age after being irradiated by ultraviolet rays. Therefore, it is necessary to develop an OCA optical adhesive having a high curing degree and a good UV aging resistance.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides the anti-UV OCA optical cement and the preparation method thereof, and the anti-UV OCA optical cement has high curing degree and better anti-UV effect.
The invention provides an anti-UV OCA optical adhesive which comprises the following raw materials in parts by mass:
10-60 parts of acrylic pressure-sensitive adhesive, 0.1-1 part of ultraviolet absorbent, 0.001-0.1 part of curing agent and 30-80 parts of solvent;
the ultraviolet absorbent is 2- (2 '-hydroxy-5' -heptyl phenyl) benzotriazole, and CAS No. 3147-75-9.
Preferably, the acrylic pressure sensitive adhesive has a viscosity of 4000 to 5000cps.
Preferably, the acrylic pressure sensitive adhesive is of type ETERAC 70556A, and has a viscosity of 4500cps.
The curing agent, also known as a hardener, curing agent or setting agent, is a substance or mixture that enhances or controls the curing reaction, and the curing agent is not particularly limited in the present invention.
Preferably, the solvent is at least one of toluene, xylene, ethyl acetate, butanone and 100-200# solvent oil.
The UV-resistant OCA optical adhesive film is prepared by sequentially coating and curing the UV-resistant OCA optical adhesive film.
Preferably, the curing is thermal curing.
Preferably, the curing temperature of the thermal curing is 80-120 ℃, and the curing time is 1-3min.
The utility model provides an anti UV's OCA optical adhesive tape, includes in proper order that light leaves type protection film, anti UV's OCA optics glued membrane, heavily leaves type protection film.
Preferably, the thickness of the light release protective film is 25-75 μm, and the release force is 6-7g/in; the thickness of the heavy release protective film is 25-75 mu m, and the release force is 16-18g/in; the thickness of the UV-resistant OCA optical adhesive film is 20-30 μm.
The preparation method of the UV-resistant OCA optical adhesive tape comprises the following steps:
s1, coating the anti-UV OCA optical adhesive on the surface of the heavy release protective film, and then performing thermal curing to form an anti-UV OCA optical adhesive film to obtain a composite adhesive layer;
and S2, adhering the light release protective film to the surface of the composite adhesive tape obtained in the step S1 to obtain the UV-resistant OCA optical adhesive tape.
The invention has the following beneficial effects:
according to the invention, by optimizing the formula of the ultraviolet absorbent, the solvent, the curing agent and the acrylic pressure-sensitive colloid system, the obtained OCA optical adhesive has an excellent ultraviolet-resistant effect, can block ultraviolet light with a wavelength of 280-380nm, has a blocking rate of up to 99%, and can form an optical adhesive film with a curing degree of up to 100% under a proper thermosetting condition, so that the OCA optical adhesive film has an excellent ultraviolet-resistant effect on the basis of complete curing of the adhesive layer; the OCA adhesive tape formed by attaching the light release protective film and the heavy release protective film to the optical adhesive film formed by the OCA optical adhesive is used as a main anti-UV functional layer, has high curing degree and excellent anti-ultraviolet performance, does not precipitate a finished product, is aging-resistant and has no adhesive residue, and has a simple structure and a good peeling effect.
Drawings
Fig. 1 is a schematic view of a UV resistant OCA optical tape according to the present invention, in which: 1-light release protective film, 2-heavy release protective film and 3-UV resistant OCA optical adhesive film.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
An anti-UV OCA optical adhesive comprises the following raw materials in parts by mass:
40 parts of acrylic pressure-sensitive adhesive ETERAC 70556A, 0.5 part of ultraviolet absorbent, 0.05 part of curing agent DE-05G0, and 50 parts of solvent; wherein the ultraviolet absorbent is 2- (2 '-hydroxy-5' -heptyl phenyl) benzotriazole, and the solvent is 100# solvent oil.
Wherein the curing agent DE-05G is produced by Kunshirai and New materials Co.
Preparing UV-resistant OCA optical cement:
weighing acrylic pressure-sensitive adhesive ETERAC 70556A, ultraviolet absorbent, curing agent DE-05G and solvent according to the mass parts, and mixing uniformly to obtain the acrylic pressure-sensitive adhesive.
An anti-UV OCA optical adhesive tape sequentially comprises a light release protective film, an anti-UV OCA optical adhesive film and a heavy release protective film, wherein the thickness of the light release protective film is 50 micrometers, the release force is 6.5g/in, the thickness of the heavy release protective film is 50 micrometers, the release force is 17.5g/in, and the thickness of the anti-UV OCA optical adhesive film is 25 micrometers; the preparation method comprises the following steps:
s1, coating the prepared anti-UV OCA optical adhesive on the surface of a heavy release protective film, and then performing thermal curing to form an anti-UV OCA optical adhesive film to obtain a composite adhesive layer, wherein the curing temperature of the thermal curing is 100 ℃, and the curing time is 2min;
and S2, attaching a light release protective film to the surface of the composite adhesive layer obtained in the step S1 to obtain the UV-resistant OCA optical adhesive tape.
Example 2
An anti-UV OCA optical adhesive comprises the following raw materials in parts by mass:
10 parts of acrylic pressure-sensitive adhesive ETERAC 70556A, 0.1 part of ultraviolet absorbent, 0.001 part of curing agent DE-05G0 and 30 parts of solvent; wherein the ultraviolet absorbent is 2- (2 '-hydroxy-5' -heptyl phenyl) benzotriazole, and the solvent is toluene.
Preparing UV-resistant OCA optical cement:
weighing the acrylic pressure-sensitive adhesive ETERAC 70556A, the ultraviolet absorbent, the curing agent DE-05G and the solvent according to the mass parts, and uniformly mixing to obtain the acrylic pressure-sensitive adhesive.
An anti-UV OCA optical adhesive tape sequentially comprises a light release protective film, an anti-UV OCA optical adhesive film and a heavy release protective film, wherein the thickness of the light release protective film is 50 mu m, the release force is 6.5g/in, the thickness of the heavy release protective film is 50 mu m, the release force is 17.5g/in, and the thickness of the anti-UV OCA optical adhesive film is 25 mu m; the preparation method comprises the following steps:
s1, coating the prepared anti-UV OCA optical adhesive on the surface of a heavy release protective film, and then performing thermal curing to form an anti-UV OCA optical adhesive film to obtain a composite adhesive layer, wherein the curing temperature of the thermal curing is 100 ℃, and the curing time is 2min;
and S2, attaching a light release protective film to the surface of the composite adhesive layer obtained in the step S1 to obtain the UV-resistant OCA optical adhesive tape.
Example 3
An anti-UV OCA optical adhesive comprises the following raw materials in parts by mass:
60 parts of acrylic pressure-sensitive adhesive ETERAC 70556A, 1 part of ultraviolet absorbent, 0.1 part of curing agent DE-05G and 80 parts of solvent; wherein the ultraviolet absorbent is 2- (2 '-hydroxy-5' -heptyl phenyl) benzotriazole, and the solvent is xylene.
Preparing UV-resistant OCA optical cement:
weighing acrylic pressure-sensitive adhesive ETERAC 70556A, ultraviolet absorbent, curing agent DE-05G and solvent according to the mass parts, and mixing uniformly to obtain the acrylic pressure-sensitive adhesive.
An anti-UV OCA optical adhesive tape sequentially comprises a light release protective film, an anti-UV OCA optical adhesive film and a heavy release protective film, wherein the thickness of the light release protective film is 50 micrometers, the release force is 6.5g/in, the thickness of the heavy release protective film is 50 micrometers, the release force is 17.5g/in, and the thickness of the anti-UV OCA optical adhesive film is 25 micrometers; the preparation method comprises the following steps:
s1, coating the prepared anti-UV OCA optical adhesive on the surface of a heavy release protective film, and then performing thermocuring to form an anti-UV OCA optical adhesive film to obtain a composite adhesive layer, wherein the thermocuring curing temperature is 100 ℃, and the curing time is 2min;
and S2, attaching a light release protective film to the surface of the composite adhesive layer obtained in the step S1 to obtain the UV-resistant OCA optical adhesive tape.
Comparative example 1
Comparative example 1 differs from example 1 only in that: the ultraviolet absorbent is 2, 4-dihydroxy benzophenone.
Comparative example 2
Comparative example 2 differs from example 1 only in that: the ultraviolet absorbent is o-phenyl hydroxybenzoate.
Comparative example 3
Comparative example 3 differs from example 1 only in that: the ultraviolet absorbent is 2-hydroxy-4-methoxybenzophenone.
Comparative example 4
Comparative example 4 differs from example 1 only in that: the ultraviolet absorber used was 2,2' -thiobis (4-tert-octylphenoloxy nickel).
Comparative example 5
Comparative example 5 differs from example 1 only in that: the ultraviolet absorbent is 2'- (2' -hydroxy-3 '-tert-butyl-5' -methylphenyl) -5-chlorobenzotriazole.
Comparative example 6
Comparative example 6 differs from example 1 only in that: the ultraviolet absorber is 2- (2 '-hydroxy-5' -methyl phenyl) benzotriazole.
The UV resistant OCA optical tapes prepared in examples 1 to 3 and comparative examples 1 to 6 were subjected to a performance test in which a UV-2600 UV spectrophotometer was used for a UV blocking rate test; the residual glue test adopts a micro-control electronic universal tester (JIS-Z-0237); the curing degree is based on the stability of hardness and viscosity compared with multiple baking; the test results are shown in table 1:
TABLE 1 OCA optical tape Performance test results
As can be seen from Table 1, the OCA optical adhesive disclosed by the invention has excellent UV resistance, can block ultraviolet light with a wavelength of 280-380nm, has a blocking rate of up to 99%, and is high in curing degree, and a finished product has no adhesive residue and is not precipitated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The UV-resistant OCA optical adhesive is characterized by comprising the following raw materials in parts by mass:
10-60 parts of acrylic pressure-sensitive adhesive, 0.1-1 part of ultraviolet absorbent, 0.001-0.1 part of curing agent and 30-80 parts of solvent;
the ultraviolet absorbent is 2- (2 '-hydroxy-5' -heptyl phenyl) benzotriazole;
the acrylic pressure sensitive adhesive is type ETERAC 70556A.
2. The UV resistant OCA optical adhesive according to claim 1, wherein the solvent is at least one of toluene, xylene, ethyl acetate, methyl ethyl ketone, and 100-200# solvent oil.
3. An anti-UV OCA optical adhesive film, which is characterized in that the anti-UV OCA optical adhesive film of claim 1 or 2 is obtained by sequentially coating and curing.
4. The UV resistant OCA optical film of claim 3, wherein the curing is thermal curing; the curing temperature of the thermal curing is 80-120 ℃, and the curing time is 1-3min.
5. An anti-UV OCA optical adhesive tape, which is characterized by comprising a light release protective film, the anti-UV OCA optical adhesive film according to claim 3 or 4, and a heavy release protective film in sequence.
6. The UV resistant OCA optical tape according to claim 5, wherein the light release protective film has a thickness of 25-75 μm and a release force of 6-7g/in; the thickness of the heavy release protective film is 25-75 mu m, and the release force is 16-18g/in; the dry glue thickness of the UV-resistant OCA optical adhesive film is 20-30 mu m.
7. A method of making a UV resistant OCA tape according to claim 5 or 6 comprising the steps of:
s1, coating anti-UV OCA optical adhesive on the surface of the heavy release protective film, and then performing thermal curing to form an anti-UV OCA optical adhesive film to obtain a composite adhesive layer;
and S2, adhering the light release protective film to the surface of the composite adhesive tape obtained in the step S1 to obtain the UV-resistant OCA optical adhesive tape.
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| CN202110648295.3A CN113322028B (en) | 2021-06-10 | 2021-06-10 | anti-UV OCA optical adhesive and preparation method thereof |
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| WO2013147101A1 (en) * | 2012-03-30 | 2013-10-03 | リンテック株式会社 | Adhesive film for protecting automobile wheel |
| JP6498991B2 (en) * | 2015-03-31 | 2019-04-10 | リンテック株式会社 | Adhesive sheet and display |
| CN107474753A (en) * | 2016-06-08 | 2017-12-15 | 张家港康得新光电材料有限公司 | Composition, OCA optical adhesive films and the thin-film solar cells of OCA optical cements |
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