CN109735180A - Protective layer coating composition and a kind of brightness enhancement film are hurt in a kind of resistance to compression - Google Patents
Protective layer coating composition and a kind of brightness enhancement film are hurt in a kind of resistance to compression Download PDFInfo
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- CN109735180A CN109735180A CN201811587521.6A CN201811587521A CN109735180A CN 109735180 A CN109735180 A CN 109735180A CN 201811587521 A CN201811587521 A CN 201811587521A CN 109735180 A CN109735180 A CN 109735180A
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Abstract
The present invention relates to optical film technology fields more particularly to a kind of resistance to compression to hurt protective layer coating composition and a kind of brightness enhancement film.Hardness in order to solve the problems, such as the back-protective layer of existing brightness enhancement film is low, resistance to compression wound difference and resistance to scraping are poor, and the present invention provides a kind of resistance to compression and hurts protective layer coating composition and a kind of brightness enhancement film.The coating composition includes hydroxy acid copolymer, curing agent and organic fine particles.The back-protective layer that coating composition provided by the invention is formed has good hardness, high pressure resistance and high resistance to scraping.
Description
Technical field
The present invention relates to optical film technology fields more particularly to a kind of resistance to compression to hurt protective layer coating composition and a kind of increasing
Bright film.
Background technique
With the continuous development of LCD technology, liquid crystal display using more and more extensive, product covers TV, electricity
The fields such as brain, navigator, automobile, mobile phone.As the important composition part of liquid crystal module, liquid crystal display is developed with optical diaphragm
Also become more and more important with improving.Mainly include in general LCD backlight mould group light source (Light Source),
Light guide plate (Light Guide Plane, LGP), diffusion barrier (Diffuser), brightness enhancement film (BEF, Prism Sheet), reflectance coating
(Reflector) etc. components, main function provide uniform area source for liquid crystal display panel.Brightness enhancement film is as important in backlight module
One of optical diaphragm, main function to increase brightness and saves the energy consumption of light source for the light that convergence light source is issued.Blast
The principle of film is one layer of micro-prism structure using its surface, repeatedly sharp by reflecting the light for issuing light source with total reflection
With, and light is guided to concentrate into positive apparent direction certain angle and is projected, it is issued with improving brightness and the light source of liquid crystal display
The utilization rate of light.
Common brightness enhancement film generally comprises substrate, micro-prism structure layer (also referred to as Facad structure layer) and back stopping off (also referred to as
Back-protective layer).Micro-prism structure layer is formed by UV transfer printing process, generally in triangular prism shape.It is general to carry on the back stopping off
It is the compo that organic filler, glue, solvent and auxiliary agent are made in advance, is then formed by coating process.The back of brightness enhancement film
Stopping off is generally mostly UV curing molding, and minority is the molding that is heating and curing.The coating of UV curing molding have surface hardness it is high,
The advantages that resistance to compression wound and good adhesion strength.But UV solidification coating also has that at high cost, energy consumption is high, complex process etc. lacks simultaneously
Point.Compared with UV coating, heat curing type coating has many advantages, such as that low in cost, energy consumption is small, easy to apply, but heat curing type coating surface layer is hard
It spends low, resistance to compression wound and scuffing performance is poor.Easily back-protective layer is caused to damage in the process of brightness enhancement film, especially be existed
Scuffing is easily caused during cutting according to backlight module shape, is easily made when cutting rear film and stacking since pressure is larger
It is weighed wounded at back stopping off.Moreover, this scratch and weigh wounded the reason of being also often brightness enhancement film back stopping off generation defect.
When by being assembled into backlight module containing the brightness enhancement film haveing damage, white point, white line will be generated on liquid crystal display picture
Or the visible defects such as leukorrhea, the display of picture has been seriously affected, the quality of backlight module is reduced.Therefore it assembles and carries on the back in brightness enhancement film
It can be examined before optical mode group, will choose and cancel with the brightness enhancement film for scratching and weighing wounded.Therefore, brightness enhancement film back, which applies to scratch and weigh wounded, is
Cause the low reason low with productivity of brightness enhancement film yield.The damage of this back stopping off and the generation of defect, are primarily due to
It is poor to carry on the back low stopping off hardness, crushing resistance and resistance to scraping.Therefore, how on thermoset coatings realize high rigidity, high pressure resistance and
High resistance to scraping becomes this field urgent problem to be solved.
Summary of the invention
Hardness in order to solve the problems, such as the back-protective layer of existing brightness enhancement film is low, resistance to compression wound difference and resistance to scraping are poor, this hair
It is bright a kind of resistance to compression is provided to hurt protective layer coating composition and a kind of brightness enhancement film.The back side that coating composition provided by the invention is formed
Protective layer has good hardness, high pressure resistance and high resistance to scraping.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical solutions:
The present invention provides a kind of resistance to compression and hurts protective layer coating composition, and the coating composition includes hydroxy acrylic acid copolymerization
Object, curing agent and organic fine particles.
The coating composition is used to form the back-protective layer of brightness enhancement film, is also referred to as used for the back-protective layer of brightness enhancement film
Coating composition.
The present invention provides a kind of resistance to compression and hurts protective layer coating composition, and the coating composition includes hydroxy acrylic acid copolymerization
Object 10-30 parts by weight, curing agent 3-8 parts by weight, organic fine particles 0.1-0.5 parts by weight, diluent 65-85 parts by weight.
Further, the coating composition further includes auxiliary agent.
Further, the coating composition further includes auxiliary agent 0.01-0.15 parts by weight.
The hydroxy acid copolymer is substrate bridging agent, and main function is that coating attachment is promoted in conjunction with substrate
Power, the main function of the curing agent are to solidify hydroxy acrylic acid crosslinking copolymers, promoted coating composition hardness and
Resistance to scraping；The main function of the auxiliary agent is the levelability for increasing coating feed liquid, and the main function of the diluent is adjusting group
The viscosity of object is closed, to achieve the purpose that make feed liquid to be uniformly mixed, be suitable for coating process, the main function of the organic fine particles is to mention
Rise the effect of coating roughness and scattering light.
The hydroxy acid copolymer is also referred to as poly- hydroxy acrylate.
Further, the hydroxy acid copolymer is selected from the poly- hydroxy acrylate with different hydroxyl values.
Further, the hydroxyl value range of the poly- hydroxy acrylate is 20-50.
Further, the glass transition temperature of the poly- hydroxy acrylate is 80-100 DEG C.
Further, the curing agent is polyisocyanate trimer.
Further, the auxiliary agent is selected from one of levelling agent, antistatic agent, defoaming agent, slipping agent, initiator or extremely
Few two kinds of combinations.
Further, the auxiliary agent is levelling agent.
Further, the partial size of the organic fine particles is 1-30 μm.
Further, the organic fine particles are selected from polymethyl methacrylate particle (PMMA), polybutyl methacrylate
Particle (PBMA), polyethylene particles (PE), polypropylene particles (PP), polyamide particles (PA), polystyrene particle (PS) have
One of machine silicon particle or at least two combination.
Further, the organic fine particles are preferably polymethyl methacrylate particle.
Further, the diluent be selected from toluene, dimethylbenzene, ethyl acetate, butyl acetate, cyclohexanone, butanone, or
One of acetone or at least two combination.
Further, the diluent is selected from ethyl acetate and butyl acetate.
Further, the weight ratio of the organic fine particles and hydroxy acid copolymer is 1:120-180.
Further, the weight ratio of the organic fine particles and hydroxy acid copolymer is preferably 1:150-160.
Further, the weight ratio of the curing agent and hydroxy acid copolymer is 1:8-16.
Further, the weight ratio of the curing agent and hydroxy acid copolymer is preferably 1:10-12.
Further, the weight ratio of the auxiliary agent and hydroxy acid copolymer is 1:1200-2000.
Further, the weight ratio of the auxiliary agent and hydroxy acid copolymer is preferably 1:1500-1600
The weight ratio of the further diluent and hydroxy acid copolymer is 1:0.4-0.8
Further, the weight ratio of the diluent and hydroxy acid copolymer is preferably 1:0.5-0.6
Further, the coating composition is mainly used for the back-protective layer of brightness enhancement film, to promote blast back of the membrane
Hardness, resistance to scraping and resistance to compression hurt performance.
Further, the coating composition include 5 parts by weight of hydroxy acrylic acid copolymer 1, curing agent 5-7 parts by weight,
0.3 parts by weight of organic fine particles, 70 parts by weight of diluent.Preceding solution includes embodiment 1-2 and embodiment 5-6.
The present invention also provides a kind of brightness enhancement film, the brightness enhancement film successively includes Facad structure layer (abbreviation structure sheaf), substrate
Layer and back-protective layer.
Further, it is formed after back-protective layer coating composition solidification provided by the present invention.
Further, the content of organic fine particles is 0.1-0.50 parts by weight in the brightness enhancement film back-protective layer.
Further, the content of organic fine particles is 0.30 parts by weight in the brightness enhancement film back-protective layer.
Further, the back-protective layer with a thickness of 8-10 μm.Further, the back-protective layer with a thickness of
9μm。
Further, the substrate layer is macromolecule copolymer resin material.The macromolecule copolymer resin is selected from poly- pair
One of ethylene terephthalate, polycarbonate, polymethyl methacrylate, polyethylene, polyvinyl chloride or polypropylene,
Or in which at least two mixture.The substrate layer is with a thickness of 50-250 μm.Further, the material of the transparent substrate layer
For PET, with a thickness of 188 μm.
Further, the material of the Facad structure layer is selected from UV-cured resin.The UV-cured resin is selected from
One of crylic acid resin, epoxy resin, carbamic acid lipid, polyethylene kind or UV-cured resin of polyesters
Or at least two combination.The material of the Facad structure layer is acrylic resin.
Further, the refractive index of the Facad structure layer resin is 1.50-1.65.The folding of the further structure sheaf
Penetrating rate is 1.53.
The present invention also provides a kind of preparation method of coating composition, by polyol copolymer, curing agent, organic fine particles and
Auxiliary agent is uniformly mixed according to the proportion, is then added diluent and is adjusted viscosity to 14-20s, stirs evenly, to obtain the final product can be after filtering
The coating composition being coated on substrate.
Further, the viscosity of the coating composition is measured using applying -4 glasss.
Further, brightness enhancement film back-protective layer of the present invention is using stick rubbing method, dimple rubbing method, scrapes cutter painting
The coating methods such as cloth method or spray coating method by solvent volatilize, be heating and curing and etc. formed back-protective layer.
Further, preferred coating method of the invention is dimple coating.
Further, the structural plane of the brightness enhancement film is that by the transfer of UV glue there is the copper roller of micro-structure to be formed.
The back-protective layer that coating composition provided by the invention is formed by curing can make brightness enhancement film with better hardness, more
Good adhesion strength and resistance to compression hurts performance.Effective solution brightness enhancement film heat curing type back stopping off difference of hardness, not scratch resistance, easily
The shortcomings that weighing wounded.Meanwhile heat curing type coating reduces coating process difficulty, saves material cost, and increasing can be effectively reduced
The energy consumption of bright film back stopping off production.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of brightness enhancement film provided by the invention.
Specific embodiment
It, hereafter will be of the invention preferable for the functional character and advantage that is more readily understood structure of the invention and can reach
Embodiment, be described below in detail:
Material and facility used in the present invention is current material and equipment.
The preparation method of coating composition provided by the invention: by Hydroxylated acrylic resin copolymer, curing agent and dilution
30min is mixed in agent according to a certain percentage, and it is equal according to corresponding proportion stirring 30min mixing that organic fine particles, auxiliary agent is then added
It is even, it then adds diluent and adjusts viscosity to 14-20s, stir evenly, be the coating group that can be coated on substrate after filtering
Close object.
Further, the viscosity of the coating composition uses -4 glasss of measurement viscosity of painting.
Coating composition provided by the invention is applied to the application method of brightness enhancement film protective layer, is coated with using dimple anilox roll
Uniformly mixed coating composition is coated uniformly in chemically treated common substrate, toasts 1-2min at 100 DEG C by mode,
Then coating and substrate cure 12-24h at 80 DEG C, and the coating of high adhesion force, high resistance to scraping can be made, and range of coat thicknesses is
8-11μm。
As shown in Figure 1, brightness enhancement film provided by the invention includes Facad structure layer 103, substrate layer 102 and back-protective layer
101。
Facad structure layer of the invention is located on the opposite another substrate surface of the back stopping off, and main function is refraction
And light being focused, and then achieve the effect that blast, the material of structure sheaf is UV acrylic resin, and the refractive index of resin is 1.53.
Structure sheaf is that by the transfer of UV glue there is the mold of micro-structure to be formed.
The painting for the back-protective layer for brightness enhancement film that the embodiment of the present invention and comparative example provide is tested in the following manner
The main performance for the coating that layer composition is formed.
1, it mist degree: utilizes haze meter (model NDH 7000), using ASTM-1003 standard testing mist degree.
2, adhesive force is tested: using GB-T9286 standard testing mist degree.
3, hardness test: GB-T6739 standard testing mist degree is used.
4, anti-scratch test: with the test of 0000# steel wire bobbles national standard method.
5, resistance to compression wound test: three diaphragms being stacked and are put into baking oven, fixed bottom area is put on diaphragm, but vary in weight
Counterweight, counterweight weight range are 50-2000g.It is taken out after 60 DEG C of baking 4h and observes at pressed counterweight whether have structure sheaf prism knot
Structure is transferred to back stopping off.The maximum counterweight weight that will not be transferred is recorded as crushing resistance test result, and counterweight weight is bigger, table
Show that the crushing resistance of back stopping off is better, i.e. the resistance to compression wound property of back stopping off is better.
Substrate used is identical in embodiment and comparative example.
Embodiment 1:
The present invention provide a kind of back-protective layer for brightness enhancement film coating composition and a kind of brightness enhancement film.
The coating composition includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,5 parts by weight of curing agent, organic fine particles
0.30 parts by weight, 70 parts by weight of diluent.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanide
Acid esters tripolymer, the organic fine particles are polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent
For ethyl acetate and butyl acetate, weight ratio 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 2:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,5 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 45；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 3:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,5 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 50；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 4:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
It includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,5 parts by weight of curing agent, organic fine particles that conjunction object, which includes: the coating composition,
0.30 parts by weight, 70 parts by weight of diluent.The hydroxyl value of the hydroxy acid copolymer is 25；The curing agent is isocyanide
Acid esters tripolymer；The organic fine particles are polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent
For ethyl acetate and butyl acetate, weight ratio 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 5:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 6:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 45；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 7:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 50；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 8:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 25；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 9:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 0 parts by weight of hydroxy acrylic acid copolymer 1,7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 8 μm of coating layer thickness.
Embodiment 10:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 30 parts by weight of hydroxy acid copolymer, 7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 10 μm of coating layer thickness.
Embodiment 11:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,3 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 12:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 5 parts by weight of hydroxy acrylic acid copolymer 1,8 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Embodiment 13:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 0 parts by weight of hydroxy acrylic acid copolymer 1,3 parts by weight of curing agent, 0.10 parts by weight of organic fine particles, 65 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 8 μm of coating layer thickness.
Embodiment 14:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 30 parts by weight of hydroxy acid copolymer, 8 parts by weight of curing agent, 0.50 parts by weight of organic fine particles, 85 weight of diluent
Measure part.The hydroxyl value of the hydroxy acid copolymer is 35；The curing agent is isocyanate trimer；Described is organic
Particle is polymethyl methacrylate particle, and particle diameter distribution is 1-30 μm；The diluent be ethyl acetate and butyl acetate,
Weight ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 10 μm of coating layer thickness.
Comparative example 1:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 15 parts by weight of polyol copolymer, 7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Part.The polyol copolymer is the mixture of Hydroxylated acrylic resin and polyester polyol, further hydroxy acrylic acid
Resin and the weight ratio of polyester polyol are 1:1, and the curing agent is isocyanate trimer；The organic fine particles are
Polymethyl methacrylate particle, particle diameter distribution are 1-30 μm；The diluent is ethyl acetate and butyl acetate, weight ratio
Example is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
Comparative example 2:
Such as the coating composition and brightness enhancement film of the back-protective layer for brightness enhancement film that embodiment 1 provides, the coating group
Closing object includes: 15 parts by weight of polyol copolymer, 7 parts by weight of curing agent, 0.30 parts by weight of organic fine particles, 70 weight of diluent
Part.The polyol copolymer is polyester polyol, and the curing agent is isocyanate trimer；The organic fine particles
For polymethyl methacrylate particle, particle diameter distribution is 1-30 μm；The diluent is ethyl acetate and butyl acetate, weight
Ratio is 1:1.
The coating composition is mixed in proportion, dimple anilox roll coating method is then used, mixing is equal
Even coating composition is coated uniformly in chemically treated common substrate, and 1-2min is toasted at 100 DEG C, then coating and substrate
12-24h is cured at 80 DEG C, can be made the coating of high adhesion force, high resistance to scraping, 9 μm of coating layer thickness.
The performance test results for the coating that 1 embodiment of table and comparative example provide
From table 1 it follows that the coating composition provided by the present invention for brightness enhancement film back-protective layer has very well
Adhesive force, can achieve V grades.It can be seen that the difference by adjusting hydroxy acrylate middle hydroxyl value from embodiment 1-4, it can
To improve coating hardness, the resistance to scraping and resistance to compression for promoting coating hurt performance.Hydroxyl value content is bigger, cross-linking reaction post-crosslinking density
Bigger, converging network is finer and close, hurts performance so as to effectively promote hardness, anti scuffing and the resistance to compression of coating.From embodiment 5-8
It is upper as can be seen that the degree of crosslinking can further be promoted by promoting the content of curing agent, thus promoted the hardness of coating, anti scuffing and
Adhesion strength.But when hydroxyl value is excessive, when curing agent excessive addition, it is excessively fine and close to will cause polymer network, and coating is caused to become
Crisp easy dusting causes brightness enhancement film easily to occur picking phenomenon during processing of cutting.Therefore hydroxyl value and curing agent additive amount need
In a suitable range.
Wherein, the embodiment of the present invention 1, embodiment 2, embodiment 5, the coating composition that embodiment 6 provides are formed by curing
Back-protective layer adhesive force it is good, hardness is high, and resistance to scraping and crushing resistance are good, and without picking phenomenon during cutting, comprehensive
Performance is more preferable.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
The equivalent changes and modifications that content is done according to the present invention are encompassed by the scope of the patents of the invention.
Claims (10)
1. protective layer coating composition is hurt in a kind of resistance to compression, which is characterized in that the coating composition includes hydroxy acrylic acid copolymerization
Object, curing agent and organic fine particles.
2. protective layer coating composition is hurt in resistance to compression according to claim 1, which is characterized in that the coating composition includes
Hydroxy acrylic acid copolymer 1 0-30 parts by weight, curing agent 3-8 parts by weight, organic fine particles 0.1-0.5 parts by weight, diluent 65-85
Parts by weight.
3. protective layer coating composition is hurt in resistance to compression according to claim 1, which is characterized in that the coating composition also wraps
Include auxiliary agent.
4. protective layer coating composition is hurt in resistance to compression according to claim 1, which is characterized in that the hydroxy acrylic acid copolymerization
Object is selected from poly- hydroxy acrylate, and the hydroxyl value range of the poly- hydroxy acrylate is 20-50.
5. protective layer coating composition is hurt in resistance to compression according to claim 1, which is characterized in that the curing agent is different to gather
Cyanate tripolymer.
6. protective layer coating composition is hurt in resistance to compression according to claim 3, which is characterized in that the auxiliary agent is selected from levelling
One of agent, antistatic agent, defoaming agent, slipping agent, initiator or at least two combinations.
7. protective layer coating composition is hurt in resistance to compression according to claim 1, which is characterized in that the partial size of the organic fine particles
It is 1-30 μm.
8. a kind of brightness enhancement film, which is characterized in that the brightness enhancement film successively includes Facad structure layer, substrate layer and back-protective layer,
Back-protective layer resistance to compression as described in one of claim 1-7 is formed after hurting the solidification of protective layer coating composition.
9. brightness enhancement film according to claim 8, which is characterized in that the back-protective layer with a thickness of 8-10 μm.
10. brightness enhancement film according to claim 8, which is characterized in that the material of the Facad structure layer is selected from UV light
Change resin.
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| CN201811587521.6A CN109735180A (en) | 2018-12-25 | 2018-12-25 | Protective layer coating composition and a kind of brightness enhancement film are hurt in a kind of resistance to compression |
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Family
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| CN111421929A (en) * | 2020-04-13 | 2020-07-17 | 宁波勤邦新材料科技有限公司 | Optical brightening laminating base film and preparation method thereof |
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