CN116218423A - UV tackifying adhesive and preparation method thereof - Google Patents
UV tackifying adhesive and preparation method thereof Download PDFInfo
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- CN116218423A CN116218423A CN202211717369.5A CN202211717369A CN116218423A CN 116218423 A CN116218423 A CN 116218423A CN 202211717369 A CN202211717369 A CN 202211717369A CN 116218423 A CN116218423 A CN 116218423A
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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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
- C09J11/02—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
- 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
- C09J133/24—Homopolymers or copolymers of amides or imides
- C09J133/26—Homopolymers or copolymers of acrylamide or methacrylamide
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
- C09J2301/502—Additional features of adhesives in the form of films or foils characterized by process specific features process for debonding adherents
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- C09J2433/00—Presence of (meth)acrylic polymer
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a UV tackifying adhesive and a preparation method thereof, and belongs to the technical field of tackifying adhesives. The UV tackifying adhesive comprises a substrate layer and an adhesive layer arranged on one surface of the substrate layer, wherein the adhesive layer comprises the following raw material components in parts by mass: 100 parts of acrylic polymer, 0.1-1.0 parts of curing agent and 0.1-0.5 part of photoinitiator; the raw material components of the acrylic polymer are as follows in parts by mass: butyl acrylate: 30-60 parts of isooctyl acrylate, 15-40 parts of hydroxyethyl acrylate, 1-5 parts of acrylamide, 5-20 parts of acrylic acid, 3-10 parts of acrylic acid and 0.02-0.4 part of a reaction initiator; the molecular weight of the acrylic polymer is 1-10 ten thousand; the glass transition temperature is-60 ℃ to-20 ℃; the solid content is 38% -42%. The UV tackifying glue has the advantages of improving the operability of lamination and reworking and the yield of products, along with small initial stripping force, easiness in reworking and great stripping force improvement through ultraviolet irradiation and rapid solidification.
Description
Technical Field
The invention belongs to the technical field of tackifying, and particularly relates to a UV tackifying adhesive and a preparation method thereof.
Background
With the iteration of display technology, it is desirable that the tape be strong in adhesion and reworkable. If the OLED module section is attached to the high-viscosity supporting film to fix the OLED screen PI, certain yield loss is caused by poor attachment due to overlarge viscosity; and if bonding between the Mini LED module PCBA and glass is carried out, the traditional mode is that a strong adhesive tape is fixed, and bonding loss exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides the UV tackifying adhesive and the preparation method thereof, wherein the UV tackifying adhesive has the advantages of small initial stripping force, easiness in reworking, and rapid solidification by ultraviolet irradiation, thereby greatly improving the stripping force.
The first object of the invention is to provide a UV tackifying adhesive, which comprises a substrate layer and a glue layer arranged on one surface of the substrate layer, wherein the glue layer comprises the following raw material components in parts by mass: 100 parts of acrylic polymer, 0.1-1.0 parts of curing agent and 0.1-0.5 part of photoinitiator;
the raw material components of the acrylic polymer are as follows in parts by mass: 30-60 parts of butyl acrylate, 15-40 parts of isooctyl acrylate, 1-5 parts of hydroxyethyl acrylate, 5-20 parts of acrylamide, 3-10 parts of acrylic acid and 0.02-0.4 part of reaction initiator;
the molecular weight of the acrylic polymer is 1-10 ten thousand; the glass transition temperature is-60 ℃ to-20 ℃; the solid content is 38% -42%.
Further, the molecular weight of the acrylic polymer is 5-7 ten thousand; the glass transition temperature Tg is between-30 ℃ and-40 ℃; the solids content was 40%.
In one embodiment of the present invention, the curing agent is one or more of triphenylmethane triisocyanate, hexamethylene diisocyanate trimer, toluene diisocyanate trimer, isophorone diisocyanate trimer, and tris (4-phenyl isocyanate) thiophosphate.
In one embodiment of the invention, the photoinitiator is diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide or 1-hydroxycyclohexyl phenyl ketone.
In one embodiment of the invention, the reaction initiator is azobisisobutyronitrile and/or dibenzoyl peroxide.
In one embodiment of the invention, the glue layer has a thickness of 5-30 μm.
In one embodiment of the present invention, the material of the substrate layer is polyethylene terephthalate, polyvinyl chloride, polyolefin, polyethylene naphthalate or polyimide; the thickness of the substrate layer is 1.5-200 mu m.
Further, the thickness of the substrate layer is 25-75 μm.
In one embodiment of the present invention, the UV tackifying adhesive further includes a release layer disposed on the other side of the adhesive layer.
In one embodiment of the invention, the release layer is made of PET organosilicon release film, the thickness is 25-75 μm, the release force is 10-30g/25mm, and the residual rate is more than 90%.
The second object of the present invention is to provide a method for preparing the UV tackifying adhesive, comprising the following steps,
(1) Butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator are dissolved in toluene and stirred and reacted for 3 to 5 hours at the temperature of between 65 and 75 ℃ to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator in the step (1) in a solvent to obtain acrylic glue;
(3) Coating the acrylic glue in the step (2) on the surface of a substrate layer, drying for 4-6 min at 80-90 ℃, and curing for 40-50 h at 40-50 ℃ to obtain the UV tackifying glue.
In one embodiment of the present invention, in step (2), the solvent is one or more of ethyl acetate, toluene, butanone, isopropanol, and methanol.
In one embodiment of the present invention, in step (2), the material of the substrate layer is polyethylene terephthalate, polyvinyl chloride, polyolefin, polyethylene naphthalate, or polyimide; the thickness of the substrate layer is 1.5-200 mu m.
In one embodiment of the present invention, in step (2), a release layer is further included on the surface of the dried material.
In one embodiment of the invention, the release layer is made of PET organosilicon release film, the thickness is 25-75 μm, the release force is 10-30g/25mm, and the residual rate is more than 90%.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the UV tackifying glue disclosed by the invention is prepared by copolymerizing specific monomer components, so that the molecular weight of the acrylic glue is small, and double bonds at two ends of a polymer have more residues; the acrylamide in the monomer contains carbon-carbon double bond and amido, is extremely easy to react under UV, and has good adhesion after the acrylamide is bridged; the viscoelasticity of the acrylic glue after ultraviolet irradiation is increased along with the increase of the molecular weight, so that the quick tackifying effect is achieved.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:
FIG. 1 is a schematic view of the UV tackifying adhesive according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
In the present invention, unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the present invention, the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items, unless otherwise indicated.
In the present invention, the range of ratios and alternatives of the components in the UV tackifying agent can be combined with each other to form a new formulation, unless otherwise specified.
In the present invention, the molecular weight of the acrylic polymer prepared in examples is about 5 to 7 tens of thousands, unless otherwise indicated; the glass transition temperature Tg is about-30 ℃ to-40 ℃; a solids content of about 40%; the viscosity is about 1100cps.
Example 1
Referring to fig. 1, a UV tackifying adhesive comprises a substrate layer, a glue layer and a release layer from bottom to top; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.9 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 49.9 parts by mass of butyl acrylate, 30 parts by mass of isooctyl acrylate, 4 parts by mass of hydroxyethyl acrylate, 10 parts by mass of acrylamide, 6 parts by mass of acrylic acid and 0.1 part by mass of azo-bis-isobutyronitrile as a reaction initiator.
The preparation of the UV tackifying adhesive specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Example 2
A UV tackifying adhesive comprises a substrate layer, a glue layer and a release layer from bottom to top in sequence; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.8 part by mass of curing agent toluene diisocyanate trimer and 0.3 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 40 parts by mass of butyl acrylate, 39.88 parts by mass of isooctyl acrylate, 4 parts by mass of hydroxyethyl acrylate, 10 parts by mass of acrylamide, 6 parts by mass of acrylic acid and 0.12 part by mass of azodiisobutyronitrile as a reaction initiator.
The preparation of the UV tackifying adhesive specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Example 3
A UV tackifying adhesive comprises a substrate layer, a glue layer and a release layer from bottom to top in sequence; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.5 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 40 parts by mass of butyl acrylate, 39.9 parts by mass of isooctyl acrylate, 5 parts by mass of hydroxyethyl acrylate, 11.5 parts by mass of acrylamide, 3.5 parts by mass of acrylic acid and 0.1 part by mass of azo-bis-isobutyronitrile as a reaction initiator.
The preparation of the UV tackifying adhesive specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Example 4
A UV tackifying adhesive comprises a substrate layer, a glue layer and a release layer from bottom to top in sequence; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.9 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 59.8 parts by mass of butyl acrylate, 20 parts by mass of isooctyl acrylate, 4 parts by mass of hydroxyethyl acrylate, 8 parts by mass of acrylamide, 8 parts by mass of acrylic acid and 0.2 part by mass of azo-bis-isobutyronitrile as a reaction initiator.
The preparation of the UV tackifying adhesive specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Example 5
A UV tackifying adhesive comprises a substrate layer, a glue layer and a release layer from bottom to top in sequence; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.9 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 39.8 parts by mass of butyl acrylate, 40 parts by mass of isooctyl acrylate, 5 parts by mass of hydroxyethyl acrylate, 5 parts by mass of acrylamide, 10 parts by mass of acrylic acid and 0.2 part by mass of azo-bis-isobutyronitrile as a reaction initiator.
The preparation of the UV tackifying adhesive specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Example 6
A UV tackifying adhesive comprises a substrate layer, a glue layer and a release layer from bottom to top in sequence; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.9 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 59.8 parts by mass of butyl acrylate, 20 parts by mass of isooctyl acrylate, 5 parts by mass of hydroxyethyl acrylate, 12 parts by mass of acrylamide, 3 parts by mass of acrylic acid and 0.2 part by mass of azo-bis-isobutyronitrile as a reaction initiator.
The preparation of the UV tackifying adhesive specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Comparative example 1
An adhesion promoter comprises a substrate layer, a glue layer and a release layer from bottom to top; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.9 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 39.8 parts by mass of butyl acrylate, 40 parts by mass of isooctyl acrylate, 5 parts by mass of hydroxyethyl acrylate, 15 parts by mass of acrylic acid and 0.2 part by mass of azodiisobutyronitrile as a reaction initiator.
The preparation of the tackifying glue specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48h, and preserving the cured aluminum foil bag in a dark place to obtain the UV tackifying glue.
Comparative example 2
An adhesion promoter comprises a substrate layer, a glue layer and a release layer from bottom to top; wherein the substrate layer is a 50 μm PET film; the thickness of the adhesive layer is 10 mu m; the release layer is a PET single-silicon release film, the thickness is 50 mu m, the release force is 20g/25mm, and the residual rate is more than 90%;
the adhesive layer comprises the following raw materials in parts by mass: 100 parts by mass of acrylic polymer, 0.9 part by mass of curing agent toluene diisocyanate trimer and 0.2 part by mass of photoinitiator diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide;
the raw material components of the acrylic polymer and the mass parts thereof are as follows: 39.8 parts by mass of butyl acrylate, 25 parts by mass of isooctyl acrylate, 5 parts by mass of hydroxyethyl acrylate, 25 parts by mass of acrylamide, 5 parts by mass of acrylic acid and 0.2 part by mass of azo-bis-isobutyronitrile as a reaction initiator.
The preparation of the tackifying glue specifically comprises the following steps:
(1) Mixing butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator uniformly, adding toluene for dilution, stirring at a constant speed of 400rpm by a stirrer, and reacting at 70 ℃ for 4 hours to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator obtained in the step (1) in ethyl acetate solvent, stirring at a constant speed of 400rpm by a stirrer, and stirring at 23+/-2 ℃ and 50+/-5 ℃ for 30min to obtain acrylic glue;
(3) And (3) directly coating the acrylic acid glue obtained in the step (2) on the surface of the substrate layer, drying in an oven after coating, drying at 85 ℃ for 5min, compounding a release layer, curing at 45 ℃ for 48 and h, and preserving the cured aluminum foil bag in a dark place to obtain the tackifying glue.
Test case
The adhesion-promoting peel force, initial adhesion and heavy duty contamination properties prepared in examples 1-6 and comparative examples 1-2 were tested:
(1) Peel force: testing according to the specification of national standard GB/T2792-1998; the UV energy selects an LED cold light source with 365 and nm wave bands;
(2) Primary adhesion: testing Tack according to a pellet method;
(3) The reworking test method comprises the following steps: the adhesive tape is attached to PI for 30min at normal temperature, and is torn rapidly, so that the pollution of the PI surface is observed; the contamination was observed by a Kien's optical microscope at 1000 times.
Table 1 shows the relevant parameters of the final measured materials:
TABLE 1
As can be seen from table 1, the UV tackifying adhesives prepared in examples 1-6 have better comprehensive properties, the molecular weight of the prepared UV tackifying adhesive is smaller and double bonds remain at two ends of the polymer by copolymerization of specific polar monomer components; the acrylamide in the monomer contains carbon-carbon double bond and amido, is extremely easy to react under UV, and has good adhesion after the acrylamide is bridged, if no acrylamide is added for reaction, the adhesion effect of the adhesion promoter is reduced, and the adhesive force is also deteriorated; the viscoelasticity of the UV tackifying agent after ultraviolet irradiation becomes larger with the increase of the molecular weight so as to achieve the tackifying effect.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. The UV tackifying adhesive comprises a substrate layer and an adhesive layer arranged on one surface of the substrate layer, and is characterized in that the adhesive layer comprises the following raw material components in parts by mass: 100 parts of acrylic polymer, 0.1-1.0 parts of curing agent and 0.1-0.5 part of photoinitiator;
the raw material components of the acrylic polymer are as follows in parts by mass: butyl acrylate: 30-60 parts of isooctyl acrylate, 15-40 parts of hydroxyethyl acrylate, 1-5 parts of acrylamide, 5-20 parts of acrylic acid, 3-10 parts of acrylic acid and 0.02-0.4 part of a reaction initiator;
the molecular weight of the acrylic polymer is 1-10 ten thousand; the glass transition temperature is-60 ℃ to-20 ℃; the solid content is 38% -42%.
2. The UV curable adhesive according to claim 1, wherein the curing agent is one or more of triphenylmethane triisocyanate, hexamethylene diisocyanate trimer, toluene diisocyanate trimer, isophorone diisocyanate trimer, and tris (4-phenylisocyanate) thiophosphate.
3. UV tackifying agent according to claim 1, characterized in that the photoinitiator is diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide or 1-hydroxycyclohexyl phenyl ketone.
4. UV-tackifying glue according to claim 1, characterized in that the reaction initiator is azobisisobutyronitrile and/or dibenzoyl peroxide.
5. UV curable adhesive according to claim 1, wherein the adhesive layer has a thickness of 5-30 μm.
6. The UV curable adhesive according to claim 1, wherein the material of the substrate layer is polyethylene terephthalate, polyvinyl chloride, polyolefin, polyethylene naphthalate or polyimide; the thickness of the substrate layer is 1.5-200 mu m.
7. The UV curable adhesive of claim 1 further comprising a release layer disposed on the other side of the adhesive layer.
8. The UV curable adhesive according to claim 7, wherein the release layer is made of a PET silicone release film with a thickness of 25-75 μm and a release force of 10-30g/25mm, and the residual rate is > 90%.
9. A process for preparing a UV-curable adhesive according to any one of claims 1 to 8, comprising the steps of,
(1) Butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator are dissolved in toluene and stirred and reacted for 3 to 5 hours at the temperature of between 65 and 75 ℃ to obtain an acrylic acid polymer;
(2) Dissolving the acrylic polymer, the curing agent and the photoinitiator in the step (1) in a solvent to obtain acrylic glue;
(3) Coating the acrylic glue in the step (2) on the surface of a substrate layer, drying for 4-6 min at 80-90 ℃, and curing for 40-50 h at 40-50 ℃ to obtain the UV tackifying glue.
10. The method of claim 9, wherein in the step (2), the solvent is one or more of ethyl acetate, toluene, butanone, isopropyl alcohol and methanol.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117603632A (en) * | 2024-01-23 | 2024-02-27 | 上海精珅新材料有限公司 | Preparation method of adhesive tape containing UV tackifying glue |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117603632A (en) * | 2024-01-23 | 2024-02-27 | 上海精珅新材料有限公司 | Preparation method of adhesive tape containing UV tackifying glue |
| CN117603632B (en) * | 2024-01-23 | 2024-04-09 | 上海精珅新材料有限公司 | Preparation method of adhesive tape containing UV tackifying glue |
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