CN110128955A - Touch screen photo-thermal dual curable optical adhesive film - Google Patents
Touch screen photo-thermal dual curable optical adhesive film Download PDFInfo
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- CN110128955A CN110128955A CN201910400337.4A CN201910400337A CN110128955A CN 110128955 A CN110128955 A CN 110128955A CN 201910400337 A CN201910400337 A CN 201910400337A CN 110128955 A CN110128955 A CN 110128955A
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- touch screen
- adhesive film
- photo
- optical adhesive
- dual curable
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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
-
- 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
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
-
- 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
-
- 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
Abstract
The present invention provides a kind of touch screen photo-thermal dual curable optical adhesive film, EVA, EBA and POE are mixed using the ratio that mass ratio is 1: 1: 1.5~1: 1: 3 as base-material, its total weight is 100 parts, and the touch screen photo-thermal dual curable optical adhesive film further includes following raw material by weight: 0.5~5 part of acrylic amide crosslinking agent；1~8 part of multi-group crosslink agent；2~5 parts of light stabilizer；1~3 part of photoinitiator；1~3 part of thermal initiator；0.2~1 part of antioxidant；0.1~1 part of binder resin.Optical adhesive film provided by the invention is by the adjustment of formula and the improvement of structure so that the novel optical glue film, which is applicable in photo-thermal dual curable and is suitable for size touch screen panel joint, is bonded and has that high transparency, fitting bubble-free, rate of good quality rate, adhesive strength is high, cure shrinkage is small, easily does over again and is bonded the advantages that at low cost, can substitute existing OCA optical film and LOCA optical film completely.
Description
Technical field
The present invention relates to a kind of optical adhesive film, in particular to a kind of touch screen photo-thermal dual curable optical adhesive film.
Background technique
Touch screen has become industry trend using full coating technique.As touch screen market is substantially grown up, touch screen is pasted
Upstream materials, such as optical cement (Optical Clear Adhesive；OCA) with optical clear resin (Optical Clear
Resin；OCR) market scale is also grown up therewith.In general, OCA mostly should in the smaller sizes touch screen such as Smartphone,
And OCR is then applied to the larger sizes products such as tablet computer more.
OCA optical cement is mainly used for soft to the soft or soft fitting to hard substrate, and colorless and transparent, light transmission rate exists
90% or more, cementing strength is good, can solidify under room temperature or medium temperature, and cure shrinkage is small.But OCA optical cement is using
When, very thin air layer can be generated so as to cause light scattering, may cause bubble, bending, junction out-of-flatness, fuzzy pictures etc.
Problem since heavy industry is lower, and is difficult to import full-automatic processing procedure, and the faulty materials generated in production process can only scrap, therefore
It causes a degree of impact to the production cost of manufacturer and influences.
Recent high price Smartphone mostly replaces OCA, such as apple (Apple) just to replace from 2011 with OCR with OCR
OCA carries out Smartphone touch screen processing procedure；The side curved surface that Samsung (Samsung Electronics) releases a little earlier
Smartphone Galaxy Note Edge also replaces OCA using OCR.Panel and transparent protective layer and liquid crystal mould can be filled in OCR
Gap between group, to improve the comparison of display, compared with the method for conventionally employed the air gap, this optical resin be can inhibit
Exterior light, which is shone, scatters situation with light caused by backlight etc..Molding OCR is reacted rapidly in UV irradiation to be had and refraction similar in glass
Rate and light transmittance, color inhibition, softness and the dilation that a variety of different substrate materials can be born, so that height when can keep out fitting
Temperature variation is led to the problem of.But OCR fitting touch screen process is relative complex, needs passing point glue pattern, precuring and cured mistake
Journey.It when solidifying using OCR, is difficult to thoroughly solidify at opaque flexible circuit board at touch screen frame and on sensor, need
Solidify again, excessive glue is difficult to control, and the glue for spilling over edge is difficult to clear up again, is difficult to control especially for large-sized fitting excessive glue
System, high production cost, production efficiency are low.Product needs transport different stations three times to four times, the cost of labor of production compared with
Height, and it is also easy to produce bubble in the process, it is also possible to the problem of leading to displacement in movement on conveyer belt, and the area the big more is also easy to produce.
The limitation being bonded in touch screen to break OCA with OCR on base material range both makes up technologic defect, specially
Benefit (application No. is: CN201610520098.2) provide a kind of acrylate modified EVA optical adhesive film of UV crosslinking curing and its system
Preparation Method,
The EVA optical adhesive film not only has that attaching process is easy, can do over again, high production efficiency, fraction defective is low and is produced into
This low feature, while there are the weatherabilities such as excellent mechanical property, water vapor rejection performance and Heat-resistant stable performance.But it is this
Its curing mode of EVA optical adhesive film is limited to UV crosslinking curing, and it is auxiliary that metal is had in capacitive touch screen structure, on sensor
The opaque structure such as electrode and flexible circuit board is helped, black or white black out ink are had on cover board frame, to ultraviolet light
Blocking meeting prevent the optical cement of the part from solidifying, will lead to the bonding of the part-structure with hidden danger in this way, and mesh
The side lamp curing process that preceding part of the manufacturer uses, and it is unable to completion of cure because the deeper irradiated area of glue-line depth is very small,
Preferable adhesive effect cannot be reached, while increasing one of complicated process again, it is very uneconomical.Using photo-thermal dual curable
It can preferably solve the problems, such as to bond insufficient, (application No. is a kind of 201610988245.9) capacitive touch screens for patent
Fitting gives the technical solution that can carry out photo-thermal dual curable with photo-thermal dual curable optical adhesive, but it is liquid
Glue, fitting process is difficult to avoid that again there is the problems such as excessive glue, bubble, poor doing over again property.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide one kind can photo-thermal dual curable and can
The touch screen done over again is bonded dedicated optical adhesive film.
In order to achieve the above objects and other related objects, the present invention provides a kind of touch screen photo-thermal dual curable optical cement
Film, EVA, EBA and POE are mixed using the ratio that mass ratio is 1: 1: 1.5~1: 1: 3 as base-material, and total weight is 100 parts, institute
State touch screen photo-thermal dual curable optical adhesive film further includes following raw material by weight:
Preparation method are as follows:
Step 1: first taking mass ratio is 1: 1: 2~1: 1: 4 EVA, EBA and POE, and EBA is then heated to 40~50
DEG C, EVA is added with the speed of 31~32mL/10min, is stirred counterclockwise 10~20 minutes with the mixing speed of 10~20rpm, then
POE is added with the speed of 40~50mL/10min, 50~60 DEG C of heating temperature, is stirred counterclockwise with the mixing speed of 15~30rpm
Mix 30~40 minutes the first mixtures of formation；
Step 2: 0.1~1 part of binder resin, 0.5~5 part of acrylic amide crosslinking agent, 1~8 part of polyfunctional group crosslinking are taken
Agent mixing, then be added into first mixture in step 1 with the speed of 40~50mL/10min, maintain the temperature at 50
~60 DEG C, and stirred counterclockwise 30~40 minutes with the mixing speed of 20~30rpm, form the second mixture；
Step 3: take 2~5 parts of light stabilizers, 1~3 part of photoinitiator, 1~3 part of thermal initiator, 0.2~1 part it is anti-oxidant
Agent and surplus auxiliary agent are successively added into second mixture of step 2, then with the mixing speed inverse time of 80~100rpm
Needle stirs 1~2 hour formation third mixture；
Step 4: the third mixture flow in third step being entered in casting machine, is squeezed out at a temperature of 90~120 DEG C,
And by 70~80 DEG C, 40~50 DEG C and 10~20 DEG C, touch screen photo-thermal is made in cooling, embossing, traction and winding three times respectively
Dual cure optical adhesive film, the touch screen is with photo-thermal dual curable optical adhesive film with a thickness of 0.1~0.9mm；
The touch screen with photo-thermal dual curable optical adhesive film after 60~80 DEG C of vacuum press are bonded precompressed, 400
It radiates 1~10 minute under~4000W high-pressure sodium lamp or is radiated 10 seconds~1 minute at 90~120 DEG C, complete crosslinking.
Preferably, the acrylic amide crosslinking agent is Methacrylamide or N, N- methylene-bisacrylamide.
Preferably, the multi-group crosslink agent is triallyl isocyanuric acid rouge, three allyl rouge of melamine, trihydroxy
Propane triacrylate, trihydroxy methyl propane trimethyl acrylic ester, pentaerythritol triacrylate, two contractings 3 the third two
Alcohol diacrylate, one or more kinds of mixtures in hydroxyethyl meth acrylate.
Preferably, the light stabilizer is a kind of hindered amine type light stabilizer, be Triallyl isocyanurate and/or
Trimethylol-propane trimethacrylate；The photoinitiator is benzoin and its derivative, benzophenone and its derivative,
Acetophenone derivs, alkylbenzene ketone and its derivative, aroyl phosphine oxide and its derivative, aroyl phosphate and its spread out
Biology, sulfur-bearing photoinitiator, anthraquinone and its derivative, triaryl salt compounded of iodine and its derivative, alkyl salt compounded of iodine and its derivative,
The mixture of one or more of triaryl sulfonium salts and its derivative, isopropylbenzene cyclopentadienyl iron and its derivative.
Preferably, thermal initiator described in the thermal initiator be one of following substance or be two kinds or two kinds with
On mixture: peroxide initiator, azo-initiator；The peroxide initiator be one of following substance,
Or two or more mixture: benzoyl peroxide, lauroyl peroxide, isopropyl benzene hydroperoxide, tert-butyl
The tertiary fourth vinegar of hydrogen peroxide, di-t-butyl peroxide, cumyl peroxide, perbenzoic acid, peroxidating trimethylacetic acid tert-butyl
Vinegar, methyl ethyl ketone peroxide, cyclohexanone peroxide, di-isopropyl peroxydicarbonate, di-cyclohexylperoxy di-carbonate；The idol
Nitrogen class initiator is one of following substance or two kinds of mixture azodiisobutyronitrile, azobisisoheptonitrile；Preferably,
The antioxidant is three (4- nonyl phenol) phosphite esters and/or phosphorous acid three (2,4- di-tert-butyl-phenyl) ester.
Preferably, the binder resin, acrylic amide crosslinking agent and multi-group crosslink agent's mass ratio are 1: 5: 8~1:
5: 10, the binder resin is made of the oligomeric resin of acrylic resin or derivatives thereof, the acrylic resin or its derivative
The oligomeric resin of object be epoxy acrylate, polyurethane acrylate, polyester acrylate, one of pure acrylic resin or
Two or more mixtures.
It preferably, further include 6~10 parts of auxiliary agent, the auxiliary agent includes defoaming agent and levelling agent, the defoaming agent and institute
The mass ratio for stating levelling agent is 1: 2~1: 5；The defoaming agent be methyltrimethoxysilane, the intoxicated silane of three ethoxy of vinyl or
One of hexa methoxy disilazane；The levelling agent is the cruel class levelling agent of acrylic acid, is polyacrylate solution, nonionic
One of type acrylic acid copolymer soln, ionic polyacrylate solution or fluorine richness polyacrylate solution.
Preferably, further include step 5, the photo-thermal dual curable optical adhesive film of the touch screen in step 4 is placed in
Negative ion concentration stands 2~5 hours in the environment greater than 3,000,000 PCS/ cubic centimetres.
Preferably, the VA content of the EVA is 25~35%.
As described above, touch screen of the invention is had the advantages that with photo-thermal dual curable optical adhesive film
1, for EBA resin from 40 degrees below zero, there are also shock resistances, material is flexible, can be used as toughener, POE resin compared with
EVA resin, without acetate in molecule, therefore it is not easy xanthochromia aging, is better than EVA resin for battery PID performance；POE is
Ethylene and octene copolymer are saturated fat chain structures, but flexible and caking property is weaker than EVA resin after its film forming, in EVA
EBA and POE is inserted with special speed in resin and adds the compound friendship of crosslinking agent containing acrylic amide and multi-group crosslink agent
Join agent, then adds suitable binder resin and glue film is made with good translucency, clarity, cementability, weatherability and stabilization
Property, it is easy to component processing, reliability can be increased, while improving its explosion-proof and its ductility, is suitble to 7~98 cun of panel patches
It closes, it may be said that no size limitation, and guarantee that novel optical film is smoothly inviscid, to ensure glue film cleanliness, can make to touch
Screen uses photo-thermal dual curable optical adhesive film light transmittance greater than 92%, shrinking percentage 0~0.3%, refractive index 1.48~1.49；
2, present invention employs acrylic amide crosslinking agents and multi-group crosslink agent to compound crosslinking agent prescription, that is, ensure that
The degree of cross linking has also neutralized acidity, reduces the corrosion to electronic product；
3, present invention employs being added in formula after first mixing crosslinking agent with proper ratio with binder resin progress, finally
The method that other compositions are added makes binder resin form caking property between corsslinking molecular, and then improves the flexibility of optical film and glue
Knot property, the bonding force for improving optical film and glass, and guarantee optical adhesive film surface obtained without glutinous viscosity；
4, the rational proportion of defoaming agent and levelling agent can guarantee optical film of the present invention bubble-free when fitting
It generates, improves adhesive product rate；
5, optical film of the invention is all made of conventional raw material, and adhesive product rate reaches 99.8%, and can be used and OCA phase
Same abutted equipment, further reduces the cost, and fitting cost is about 1/2, about the 1/4 of OCA of LOCA fitting；
6, strict temperature control, inflow velocity, stirring in each raw material the preparation method the step of in one~step 3
Speed and mixing direction guarantee yield rate optical adhesive film surface made from 99.5% or more and guarantee of product without glutinous viscosity；
7, four the preparation method the step of in the third mixture flow in third step is entered in casting machine, 90~
It squeezes out at a temperature of 120 DEG C, and is cooled down three times by 70~80 DEG C, 40~50 DEG C and 0~30 DEG C respectively, product can be effectively improved
Optical adhesive film surface made from adhesive product rate and guarantee is without glutinous viscosity；
8, the photo-thermal dual curable optical adhesive film of touch screen made from step 4 is placed in negative ion concentration and is greater than 3,000,000
2~5 hours are stood in PCS/ cubic centimetres of environment, further can effectively inhibit touch screen photo-thermal dual curable optical adhesive film
Xanthochromia.
9, optical film of the invention can realize photo-thermal dual curable, overflow adhesive, bubble-free, easily do over again,
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
The present invention provides a kind of touch screen photo-thermal dual curable optical adhesive film, and EVA, EBA and POE are with mass ratio for 1: 1:
1.5~1: 1: 3 ratio mixing is used as base-material, and total weight is 100 parts, touch screen photo-thermal dual curable optical adhesive film
By weight further include following raw material:
Preparation method are as follows:
Step 1: first taking mass ratio is 1: 1: 2~1: 1: 4 EVA, EBA and POE, and EBA is then heated to 40~50
DEG C, EVA is added with the speed of 31~32mL/10min, is stirred counterclockwise 10~20 minutes with the mixing speed of 10~20rpm, then
POE is added with the speed of 40~50mL/10min, 50~60 DEG C of heating temperature, is stirred counterclockwise with the mixing speed of 15~30rpm
Mix 30~40 minutes the first mixtures of formation；
Step 2: 0.1~1 part of binder resin, 0.5~5 part of acrylic amide crosslinking agent, 1~8 part of polyfunctional group crosslinking are taken
Agent mixing, then be added into first mixture in step 1 with the speed of 40~50mL/10min, maintain the temperature at 50
~60 DEG C, and stirred counterclockwise 30~40 minutes with the mixing speed of 20~30rpm, form the second mixture；
Step 3: take 2~5 parts of light stabilizers, 1~3 part of photoinitiator, 1~3 part of thermal initiator, 0.2~1 part it is anti-oxidant
Agent and surplus auxiliary agent are successively added into second mixture of step 2, then with the mixing speed inverse time of 80~100rpm
Needle stirs 1~2 hour formation third mixture；
Step 4: the third mixture flow in third step being entered in casting machine, is squeezed out at a temperature of 90~120 DEG C,
And by 70~80 DEG C, 40~50 DEG C and 10~20 DEG C, touch screen photo-thermal is made in cooling, embossing, traction and winding three times respectively
Dual cure optical adhesive film, the touch screen is with photo-thermal dual curable optical adhesive film with a thickness of 0.1~0.9mm；
The touch screen with photo-thermal dual curable optical adhesive film after 60~80 DEG C of vacuum press are bonded precompressed, 400
It radiates 1~10 minute under~4000W high-pressure sodium lamp or is radiated 10 seconds~1 minute at 90~120 DEG C, complete crosslinking.
The acrylic amide crosslinking agent is Methacrylamide or N, N- methylene-bisacrylamide.
The multi-group crosslink agent is triallyl isocyanuric acid rouge, three allyl rouge of melamine, trihydroxy methyl third
Three acrylate of alkane, trihydroxy methyl propane trimethyl acrylic ester, pentaerythritol triacrylate, tripropylene glycol dipropyl
Olefin(e) acid ester, one or more kinds of mixtures in hydroxyethyl meth acrylate.
The light stabilizer is a kind of hindered amine type light stabilizer, is Triallyl isocyanurate and/or three hydroxyl first
Base propane trimethyl acrylic ester；The photoinitiator is benzoin and its derivative, benzophenone and its derivative, acetophenone
Derivative, alkylbenzene ketone and its derivative, aroyl phosphine oxide and its derivative, aroyl phosphate and its derivative,
Sulfur-bearing photoinitiator, anthraquinone and its derivative, triaryl salt compounded of iodine and its derivative, alkyl salt compounded of iodine and its derivative, three virtues
The mixture of one or more of base sulfosalt and its derivative, isopropylbenzene cyclopentadienyl iron and its derivative.
Thermal initiator described in the thermal initiator is one of following substance or is two or more mixing
Object: peroxide initiator, azo-initiator；The peroxide initiator is one of following substance or is two
Kind or two or more mixtures: benzoyl peroxide, lauroyl peroxide, isopropyl benzene hydroperoxide, tert-butyl hydroperoxide,
The tertiary fourth vinegar of di-t-butyl peroxide, cumyl peroxide, perbenzoic acid, peroxidating trimethylacetic acid tert-butyl vinegar, peroxidating
Methyl ethyl ketone, cyclohexanone peroxide, di-isopropyl peroxydicarbonate, di-cyclohexylperoxy di-carbonate；The azo causes
Agent is one of following substance or two kinds of mixture azodiisobutyronitrile, azobisisoheptonitrile；Preferably, the antioxygen
Agent is three (4- nonyl phenol) phosphite esters and/or phosphorous acid three (2,4- di-tert-butyl-phenyl) ester.
The binder resin, acrylic amide crosslinking agent and multi-group crosslink agent's mass ratio are 1: 5: 8~1: 5: 10, institute
Binder resin is stated to be made of the oligomeric resin of acrylic resin or derivatives thereof, described acrylic resin or derivatives thereof it is oligomeric
Resin is epoxy acrylate, polyurethane acrylate, polyester acrylate, one or more of pure acrylic resin
Mixture.
It further include 6~10 parts of auxiliary agent, the auxiliary agent includes defoaming agent and levelling agent, the defoaming agent and the levelling agent
Mass ratio be 1: 2~1: 5；The defoaming agent is methyltrimethoxysilane, the intoxicated silane of three ethoxy of vinyl or hexa methoxy
One of disilazane；The levelling agent is the cruel class levelling agent of acrylic acid, is polyacrylate solution, nonionic acrylic
One of copolymer solution, ionic polyacrylate solution or fluorine richness polyacrylate solution.
It further include step 5, it is dense that the photo-thermal dual curable optical adhesive film of the touch screen in step 4 is placed in anion
Degree stands 2~5 hours in the environment greater than 3,000,000 PCS/ cubic centimetres.
The VA content of the EVA is 25~35%.
Embodiment 1:
It first takes 20 parts of EBA to be heated to 50 DEG C, the EVA that 60 parts of VA contents are 35% is added with the speed of 40mL/10min,
It is stirred counterclockwise 20 minutes with the mixing speed of 20rpm, then 20 parts of POE, heating temperature 60 is added with the speed of 50mL/10min
DEG C, 40 minutes the first mixtures of formation are stirred counterclockwise with the mixing speed of 30rpm；
1 part of binder resin, 5 parts of acrylic amide crosslinking agents, 8 parts of multi-group crosslink agent's mixing are taken, then with 50mL/
The speed of 10min is added into first mixture, maintains the temperature at 60 DEG C, and stir counterclockwise with the mixing speed of 20rpm
It mixes 40 minutes, forms the second mixture；
Take 5 parts of light stabilizers, 3 parts of photoinitiators, 3 parts of thermal initiators, 1 part of antioxidant, 2 parts of defoaming agents and 8 parts of levellings
Agent is successively added into second mixture, and it is mixed then to stir 2 hours formation thirds counterclockwise with the mixing speed of 100rpm
Close object；
The third mixture flow is entered in casting machine, is squeezed out at a temperature of 120 DEG C, and respectively by 80 DEG C, 50 DEG C and
20 DEG C touch screen photo-thermal dual curable optical adhesive film, the touch screen photo-thermal is made in cooling, embossing, traction and winding three times
Dual cure optical adhesive film with a thickness of 0.1mm；
Embodiment 2:
It first takes 30 parts of EBA to be heated to 45 DEG C, the EVA that 40 parts of VA contents are 30% is added with the speed of 31mL/10min,
It is stirred counterclockwise 20 minutes with the mixing speed of 20rpm, then 30 parts of POE, heating temperature 60 is added with the speed of 50mL/10min
DEG C, 30 minutes the first mixtures of formation are stirred counterclockwise with the mixing speed of 30rpm；
0.5 part of binder resin, 2.5 parts of acrylic amide crosslinking agents, 5 parts of multi-group crosslink agent's mixing are taken, then with 40mL/
The speed of 10min is added into first mixture, maintains the temperature at 50 DEG C, and stir counterclockwise with the mixing speed of 20rpm
It mixes 40 minutes, forms the second mixture；
Take 2 parts of light stabilizers, 1 part of photoinitiator, 1 part of thermal initiator, 0.2 part of antioxidant, 2 parts of defoaming agents and 6 parts of streams
Flat agent is successively added into second mixture, and it is mixed then to stir 1 hour formation third counterclockwise with the mixing speed of 80rpm
Close object；
The third mixture flow is entered in casting machine, is squeezed out at a temperature of 120 DEG C, and respectively by 70 DEG C, 40 DEG C and
10 DEG C touch screen photo-thermal dual curable optical adhesive film, the touch screen photo-thermal is made in cooling, embossing, traction and winding three times
Dual cure optical adhesive film with a thickness of 0.5mm；
Embodiment 3:
It first takes 20 parts of EBA to be heated to 50 DEG C, the EVA that 60 parts of VA contents are 28% is added with the speed of 32mL/10min,
It is stirred counterclockwise 20 minutes with the mixing speed of 20rpm, then 20 parts of POE, heating temperature 60 is added with the speed of 50mL/10min
DEG C, 40 minutes the first mixtures of formation are stirred counterclockwise with the mixing speed of 30rpm；
0.1 part of binder resin, 0.5 part of acrylic amide crosslinking agent, 1 part of multi-group crosslink agent's mixing are taken, then with 40mL/
The speed of 10min is added into first mixture, maintains the temperature at 50 DEG C, and stir counterclockwise with the mixing speed of 20rpm
It mixes 30 minutes, forms the second mixture；
Take 2 parts of light stabilizers, 1 part of photoinitiator, 1 part of thermal initiator, 0.2 part of antioxidant, 2 parts of defoaming agents and 4 parts of streams
Flat agent is successively added into second mixture, and it is mixed then to stir 2 hours formation thirds counterclockwise with the mixing speed of 80rpm
Close object；
The third mixture flow is entered in casting machine, is squeezed out at a temperature of 90 DEG C, and passes through 70 DEG C, 40 DEG C and 20 respectively
It is DEG C three times cooling, be embossed, traction and wind touch screen photo-thermal dual curable optical adhesive film is made, the touch screen is double with photo-thermal
Solidify again optical adhesive film with a thickness of 0.3mm；
Embodiment 4:
It first takes 30 parts of EBA to be heated to 50 DEG C, the EVA that 45 parts of VA contents are 32% is added with the speed of 31mL/10min,
It is stirred counterclockwise 10 minutes with the mixing speed of 10rpm, then 30 parts of POE, heating temperature 60 is added with the speed of 40mL/10min
DEG C, 30 minutes the first mixtures of formation are stirred counterclockwise with the mixing speed of 15rpm；
1 part of binder resin, 5 parts of acrylic amide crosslinking agents, 8 parts of multi-group crosslink agent's mixing are taken, then with 50mL/
The speed of 10min is added into first mixture, maintains the temperature at 60 DEG C, and stir counterclockwise with the mixing speed of 20rpm
It mixes 40 minutes, forms the second mixture；
Take 5 parts of light stabilizers, 3 parts of photoinitiators, 3 parts of thermal initiators, 1 part of antioxidant, 2 parts of defoaming agents and 8 parts of levellings
Agent is successively added into second mixture, and it is mixed then to stir 2 hours formation thirds counterclockwise with the mixing speed of 100rpm
Close object；
The third mixture flow is entered in casting machine, is squeezed out at a temperature of 120 DEG C, and respectively by 80 DEG C, 50 DEG C and
20 DEG C touch screen photo-thermal dual curable optical adhesive film, the touch screen photo-thermal is made in cooling, embossing, traction and winding three times
Dual cure optical adhesive film with a thickness of 0.7mm；
Embodiment 5:
It first takes 25 parts of EBA to be heated to 45 DEG C, the EVA that 50 parts of VA contents are 28% is added with the speed of 35mL/10min,
It is stirred counterclockwise 15 minutes with the mixing speed of 15rpm, then 25 parts of POE, heating temperature 55 is added with the speed of 45mL/10min
DEG C, 35 minutes the first mixtures of formation are stirred counterclockwise with the mixing speed of 25rpm；
0.2 part of binder resin, 1 part of acrylic amide crosslinking agent, 1.8 parts of multi-group crosslink agent's mixing are taken, then with 45mL/
The speed of 10min is added into first mixture, maintains the temperature at 55 DEG C, and stir counterclockwise with the mixing speed of 25rpm
It mixes 35 minutes, forms the second mixture；
Take 3 parts of light stabilizers, 2 parts of photoinitiators, 2 parts of thermal initiators, 0.5 part of antioxidant and 2 parts of defoaming agents and 6 parts of streams
Flat agent is successively added into second mixture, then stirs 1.5 hours formation thirds counterclockwise with the mixing speed of 90rpm
Mixture；
The third mixture flow in third step is entered in casting machine, is squeezed out at a temperature of 100 DEG C, and passes through 75 respectively
DEG C, 45 DEG C and 15 DEG C are cooling three times, be embossed, traction and wind touch screen photo-thermal dual curable optical adhesive film, the touching is made
Touch screen photo-thermal dual curable optical adhesive film with a thickness of 0.6mm；
Embodiment 6:
It first takes 30 parts of EBA to be heated to 50 DEG C, the EVA that 45 parts of VA contents are 25% is added with the speed of 30mL/10min,
It is stirred counterclockwise 10 minutes with the mixing speed of 10rpm, then 30 parts of POE, heating temperature 60 is added with the speed of 40mL/10min
DEG C, 30 minutes the first mixtures of formation are stirred counterclockwise with the mixing speed of 15rpm；
0.1 part of binder resin, 0.5 part of acrylic amide crosslinking agent, 1 part of multi-group crosslink agent's mixing are taken, then with 40mL/
The speed of 10min is added into first mixture, maintains the temperature at 50 DEG C, and stir counterclockwise with the mixing speed of 20rpm
It mixes 30 minutes, forms the second mixture；
Take 2 parts of light stabilizers, 1 part of photoinitiator, 1 part of thermal initiator, 0.2 part of antioxidant, 2 parts of defoaming agents and 4 parts of streams
Flat agent is successively added into second mixture, and it is mixed then to stir 2 hours formation thirds counterclockwise with the mixing speed of 80rpm
Close object；
The third mixture flow is entered in casting machine, is squeezed out at a temperature of 90 DEG C, and passes through 70 DEG C, 40 DEG C and 20 respectively
It is DEG C three times cooling, be embossed, traction and wind touch screen photo-thermal dual curable optical adhesive film is made, the touch screen is double with photo-thermal
Solidify again optical adhesive film with a thickness of 0.1mm；
In above-described embodiment:
The acrylic amide crosslinking agent is Methacrylamide or N, N- methylene-bisacrylamide.
The multi-group crosslink agent is triallyl isocyanuric acid rouge, three allyl rouge of melamine, trihydroxy methyl third
Three acrylate of alkane, trihydroxy methyl propane trimethyl acrylic ester, pentaerythritol triacrylate, tripropylene glycol dipropyl
Olefin(e) acid ester, one or more kinds of mixtures in hydroxyethyl meth acrylate.
The light stabilizer is a kind of hindered amine type light stabilizer, is Triallyl isocyanurate and/or three hydroxyl first
Base propane trimethyl acrylic ester；The photoinitiator is benzoin and its derivative, benzophenone and its derivative, acetophenone
Derivative, alkylbenzene ketone and its derivative, aroyl phosphine oxide and its derivative, aroyl phosphate and its derivative,
Sulfur-bearing photoinitiator, anthraquinone and its derivative, triaryl salt compounded of iodine and its derivative, alkyl salt compounded of iodine and its derivative, three virtues
The mixture of one or more of base sulfosalt and its derivative, isopropylbenzene cyclopentadienyl iron and its derivative.
Thermal initiator described in the thermal initiator is one of following substance or is two or more mixing
Object: peroxide initiator, azo-initiator: the peroxide initiator is one of following substance or is two
Kind or two or more mixtures: benzoyl peroxide, lauroyl peroxide, isopropyl benzene hydroperoxide, tert-butyl hydroperoxide,
The tertiary fourth vinegar of di-t-butyl peroxide, cumyl peroxide, perbenzoic acid, peroxidating trimethylacetic acid tert-butyl vinegar, peroxidating
Methyl ethyl ketone, cyclohexanone peroxide, di-isopropyl peroxydicarbonate, di-cyclohexylperoxy di-carbonate；The azo causes
Agent is the mixture of one of following substance or two kinds: azodiisobutyronitrile, azobisisoheptonitrile；
The antioxidant is three (4- nonyl phenol) phosphite esters and/or phosphorous acid three (2,4- di-tert-butyl-phenyl) ester.
The binder resin is made of the oligomeric resin of acrylic resin or derivatives thereof, the acrylic resin or its spread out
The oligomeric resin of biology is epoxy acrylate, polyurethane acrylate, polyester acrylate, one of pure acrylic resin
Or two or more mixture.
The conven-tional adjuvants include defoaming agent and levelling agent, and the defoaming agent is methyltrimethoxysilane, vinyl three
One of the intoxicated silane of ethoxy or hexa methoxy disilazane；The levelling agent is the cruel class levelling agent of acrylic acid, is polyacrylic acid
Ester solution, nonionic acrylic copolymer solution, ionic polyacrylate solution or fluorine richness polyacrylate solution
One of.
The touch screen of above-described embodiment 1~6 photo-thermal dual curable optical adhesive film is passed through into 60~80 DEG C of vacuum press
After being bonded precompressed, is radiated 1~10 minute under 400~4000W high-pressure sodium lamp or radiate 10 seconds~1 point at 90~120 DEG C
Clock, completes crosslinking, the touch screen with photo-thermal dual curable optical adhesive film after the prepressing if it find that bubble, then on touch screen side
Alcohol is added dropwise in edge, penetrates into then as alcohol, then apply certain external force, and screen is easy for dismantling and comes.
The photo-thermal dual curable optical adhesive film surface tack free of touch screen described in Examples 1 to 6, light transmittance are all larger than
92%, shrinking percentage 0~0.3%, refractive index 1.48~1.49 is close with glass.
The photo-thermal dual curable optical adhesive film of touch screen described in Examples 1 to 6 is placed in negative ion concentration and is greater than 3,000,000
Stand 2~5 hours in PCS/ cubic centimetres of environment, than be not statically placed in above-mentioned anion environment optical film color inhibition when
Between extend 10~20%.
The photo-thermal dual curable optical adhesive film of touch screen described in Examples 1 to 6, smooth surface is inviscid, DH 1000h (85
DEG C, 85%R.H) afterwards bonding force be 40N/cm, bonding force is 30N/cm after UV60Kwh, DH 1000h (85 DEG C, 85%R.H) and
Without xanthochromia after burn-in test after UV 60Kwh, bubble-free is generated, reliable in quality.
It is double with photo-thermal using touch screen described in Examples 1 to 6 on a large automatic hot press (2200X3600mm)
Solidify novel optical glue film described in optical adhesive film again and be bonded 15 cun of panels, can once be bonded 72,4 numbers of fitting in one hour are total
Meter can be bonded 288 panels in one hour, and production efficiency is higher.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of touch screen photo-thermal dual curable optical adhesive film, which is characterized in that EVA, EBA and POE are with mass ratio for 1: 1:
1.5~1: 1: 3 ratio mixing is used as base-material, and total weight is 100 parts, touch screen photo-thermal dual curable optical adhesive film
By weight further include following raw material:
Preparation method are as follows:
Step 1: first taking mass ratio is 1: 1: 2~1: 1: 4 EVA, EBA and POE, and EBA is then heated to 40~50 DEG C, with
The speed of 31~32mL/10min adds EVA, is stirred counterclockwise 10~20 minutes with the mixing speed of 10~20rpm, then with 40
The speed of~50mL/10min adds POE, 50~60 DEG C of heating temperature, stirs 30 counterclockwise with the mixing speed of 15~30rpm
~40 minutes the first mixtures of formation；
Step 2: take 0.1~1 part of binder resin, 0.5~5 part of acrylic amide crosslinking agent, 1~8 part of multi-group crosslink agent mixed
It closes, then is added into first mixture in step 1 with the speed of 40~50mL/10min, maintain the temperature at 50~60
DEG C, and stirred counterclockwise 30~40 minutes with the mixing speed of 20~30rpm, form the second mixture；
Step 3: take 2~5 parts of light stabilizers, 1~3 part of photoinitiator, 1~3 part of thermal initiator, 0.2~1 part of antioxidant and
Surplus auxiliary agent is successively added into second mixture of step 2, is then stirred counterclockwise with the mixing speed of 80~100rpm
Mix 1~2 hour formation third mixture；
Step 4: the third mixture flow in third step being entered in casting machine, is squeezed out at a temperature of 90~120 DEG C, and point
Not Jing Guo 70~80 DEG C, 40~50 DEG C and 10~20 DEG C it is cooling three times, be embossed, traction and wind that touch screen photo-thermal is made is dual
Solidify optical adhesive film, the touch screen is with photo-thermal dual curable optical adhesive film with a thickness of 0.1~0.9mm；
The touch screen with photo-thermal dual curable optical adhesive film after 60~80 DEG C of vacuum press are bonded precompressed, 400~
It radiates 1~10 minute under 4000W high-pressure sodium lamp or is radiated 10 seconds~1 minute at 90~120 DEG C, complete crosslinking.
2. touch screen according to claim 1 photo-thermal dual curable optical adhesive film, which is characterized in that the acrylamide
Class crosslinking agent is Methacrylamide or N, N- methylene-bisacrylamide.
3. touch screen according to claim 1 photo-thermal dual curable optical adhesive film, which is characterized in that the polyfunctional group
Crosslinking agent is triallyl isocyanuric acid rouge, three allyl rouge of melamine, three acrylate of trihydroxy methyl propane, trihydroxy first
Base propane trimethyl acrylic ester, pentaerythritol triacrylate, tri (propylene glycol) diacrylate, hydroxyethyl methyl propylene
One or more kinds of mixtures in acid esters.
4. touch screen according to claim 1 photo-thermal dual curable optical adhesive film, it is characterised in that the light stabilizer
It is a kind of hindered amine type light stabilizer, is Triallyl isocyanurate and/or trimethylol-propane trimethacrylate；
The photoinitiator is benzoin and its derivative, benzophenone and its derivative, acetophenone derivs, alkylbenzene ketone and its
Derivative, aroyl phosphine oxide and its derivative, aroyl phosphate and its derivative, sulfur-bearing photoinitiator, anthraquinone and its
Derivative, triaryl salt compounded of iodine and its derivative, alkyl salt compounded of iodine and its derivative, triaryl sulfonium salts and its derivative, it is different
The mixture of one or more of propyl benzene cyclopentadienyl iron and its derivative.
5. touch screen according to claim 1 photo-thermal dual curable optical adhesive film, which is characterized in that the thermal initiator
The thermal initiator is one of following substance or is two or more mixture: peroxide initiator, idol
Nitrogen class initiator；
The peroxide initiator is one of following substance or is two or more mixture: peroxidating
Benzoyl, lauroyl peroxide, isopropyl benzene hydroperoxide, tert-butyl hydroperoxide, di-t-butyl peroxide, peroxidating diisopropyl
The tertiary fourth vinegar of benzene, perbenzoic acid, peroxidating trimethylacetic acid tert-butyl vinegar, methyl ethyl ketone peroxide, cyclohexanone peroxide, peroxidating two
Diisopropyl carbonate, di-cyclohexylperoxy di-carbonate；
The azo-initiator is one of following substance or two kinds of mixture azodiisobutyronitrile, azo two different heptan
Nitrile.
6. touch screen according to claim 1 photo-thermal dual curable optical adhesive film, which is characterized in that the antioxidant
For three (4- nonyl phenol) phosphite esters and/or phosphorous acid three (2,4- di-tert-butyl-phenyl) ester.
7. touch screen according to claim 2 photo-thermal dual curable optical adhesive film, which is characterized in that the bonding tree
Rouge, acrylic amide crosslinking agent and multi-group crosslink agent's mass ratio are 1: 5: 8~1: 5: 10, and the binder resin is by acrylic acid
The oligomeric resin of resin or derivatives thereof forms, and the oligomeric resin of described acrylic resin or derivatives thereof is epoxy acrylic
Rouge, polyurethane acrylate, polyester acrylate, the mixture of one or more of pure acrylic resin.
8. touch screen according to claim 1 photo-thermal dual curable optical adhesive film, which is characterized in that further include 6~10
Part auxiliary agent, the auxiliary agent includes defoaming agent and levelling agent, and the mass ratio of the defoaming agent and the levelling agent is 1: 2~1: 5；
The defoaming agent is one of methyltrimethoxysilane, the intoxicated silane of three ethoxy of vinyl or hexa methoxy disilazane；Institute
Stating levelling agent is the cruel class levelling agent of acrylic acid, poly- for polyacrylate solution, nonionic acrylic copolymer solution, ionic
One of acrylate solution or fluorine richness polyacrylate solution.
9. touch screen according to any one of claims 1 to 8 photo-thermal dual curable optical adhesive film, which is characterized in that also
Including step 5, the photo-thermal dual curable optical adhesive film of the touch screen in step 4 is placed in negative ion concentration and is greater than 300
2~5 hours are stood in ten thousand PCS/ cubic centimetres of environment.
10. touch screen according to any one of claims 1 to 8 photo-thermal dual curable optical adhesive film, which is characterized in that institute
The VA content for stating EVA is 25~35%.
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Application publication date: 20190816 |