A kind of anti-scraping coating of environmental protection resistance and fingerprint resistance and its application method
Technical field
The present invention relates to coatings art more particularly to a kind of anti-scraping coating of environmentally friendly resistance and fingerprint resistance and its application methods.
Background technology
Consumer often leaves the spots such as fingerprint and slight scratch, seriously when buying contact product in packaging
Product appearance is affected, is upgraded with universal and China the consumption of 3C electronic products, industry carries the packaging material of product
Go out the performance requirements such as higher resistance and fingerprint resistance, scratch resistant.The anti-scraping coating of resistance and fingerprint resistance is the coating that a kind of organic polymer is composed, main
Possess the characteristics such as hydrophobic, oleophobic, scratch resistance.At present, anti-finger printing can be realized mainly by two ways:First, using low table
Face can chemical material, it is classic for organic fluoride class substance at present, but in system fluorine component genotoxic potential and expensive price
Its application in commodity packaging is seriously affected.2nd, using physical arrangement, lotus leaf effect is imitated, but this structure is often
The problems such as in the presence of processing difficulties, shortage durability degree and the bad transparency is manufactured.In recent years, single-component water-based polyurethane is from delustring tree
Fat is due to properties such as excellent dumb lights and permeability, starting to be paid close attention to by coating circle.It is but aqueous from delustring tree at present
The defects of fat generally existing film forming is insufficient, resistance to scraping is poor.
Invention content
Based on this, the object of the present invention is to provide a kind of anti-scraping coatings of environmentally friendly resistance and fingerprint resistance, are imitated with good dumb light
Fruit, permeability, anti-finger printing and scratch resistant property.
Another object of the present invention is to provide a kind of application methods of the anti-scraping coating of environmentally friendly resistance and fingerprint resistance, have simple
It is easy, adhesion is good, applicability is wide on all kinds of base materials the advantages of.
The purpose of the present invention is what is be achieved through the following technical solutions:The anti-scraping coating of a kind of environmental protection resistance and fingerprint resistance, by quality hundred
Divide and include following component than meter:Aqueous polyurethane 5~90%, organosilicon-modified acrylic 5~90%, pH adjusting agent 0.1~
1%, moistening flatting agent 0.1~0.8%, antifoaming agent 0.1~1%, curing agent 1~5%, cosolvent 1~40%.
The main component of finger sweat is water, accounts for about the 98% of total ingredient, finger sweat further include a small amount of urea and
Grease accounts for about the 1~2% of total ingredient.Wherein, lubricant component is mainly by 40% triglyceride (triglycerides), 25%
Monoester wax (wax monoesters), 15% free fatty acids (free fatty acids), 12% squalene (squalene) and
7% other materials form, these are all very easy in product surface fingerprints trace, must in order to achieve the purpose that resistance and fingerprint resistance
It must make product surface that there is hydrophobic, oleophobic.
The surface of product surface can be the key factor for determining resistance and fingerprint resistance, and the surface of water can (γw) it is 72mN/m, it is most of
It the surface of grease can (γl) in 20~40mN/m, when the surface of the product of preparation can (γa) less than the surface energy (γ of sweats)
When, the sweat of finger surface is just not easy to be attached to product surface, so as to achieve the effect that resistance and fingerprint resistance.Currently used low-surface-energy
Material is organosilicon, organic fluoride class.The surface of organic fluoride class substance-CF3 groups can as low as 10mN/m, be current minimum surface energy
Resistance and fingerprint resistance material, but the genotoxic potential of fluorine component and expensive price have seriously affected it in commodity packaging in system
Using.Organic siliconresin is containing the high polymer that organic group is connected on Si-O-Si structures, silicon atom, silicon atom in strand
Electronegativity is relatively low, and Si-O-Si bond energys, bond angle are bigger than C-C key, and strand compliance is high, and this special valence bond structure makes it
With many excellent physics for being different from carbon-based polymer, chemical property, such as high temperature resistant, wear-resisting, corrosion-resistant, surface can it is small,
The features such as film forming ability is strong, organosilicon-modified acrylic film coated surface can be about 23mN/m, and there is no poison for organic silicon substance
The release loss problem of object, has good anti-fouling effect.
For a hydrophobic surface of solids, product surface and water contact angle not only with surface energy it is related also and table
Surface roughness is related, when there is microspike on surface, has some air between water and the surface of solids, to be caused by " pass is arrived "
Small water droplet is largely contacted with air, and be in direct contact area with solid greatly reduces instead, since the surface tension effects of water make
Water is shunk in this rough surface, and such surface is just provided with the ability of anti-pollution.On the surface of material after aqueous polyurethane film forming
It with concave-convex alternate micro-sphere structure, can make incident light that diffusing reflection occur, so as to achieve the effect that from delustring, and study hair
It is existing, when the depth at surface indentation position is relatively larger than the height of finger dermal papilla streakline, finger contact coating surface phase interaction
Used time can only leave less clearly fingerprint form at surface indentation position, weaken the trace and retention time of fingerprint significantly.
Relative to the prior art, the present invention is combined using organosilicon-modified acrylic with aqueous polyurethane component, makes low table
Face energy organosilicon-modified acrylic is evenly coated at aqueous polyurethane microsphere surface by chemical crosslinking, so as to gather low-surface-energy
It closes the chemical anti-pollution effect of object and the physics anti-pollution effect of concaveconvex structure plays mutually synergistic effect, and coordinates pH adjusting agent, wetting
Levelling agent, antifoaming agent, curing agent and co-solvent component rationally adjust each group distribution ratio, so as to keep coating good print
While, make coating that there are good permeability (light transmittance is more than 90%), good matte effect (60 ° of lower glossiness <
2.5), good scratch resistant property (after rubbing 1000 times under 1000g weights pressure, the variation of only slight glossiness,
60 ° of lower glossiness variations<0.5, and scratch completely disappears after a period of time) and good anti-finger printing.
Further, the anti-scraping coating of the environmentally friendly resistance and fingerprint resistance includes following component by mass percentage:Aqueous polyurethane
50~90%, organosilicon-modified acrylic 5~40%, pH adjusting agent 0.1~1%, moistening flatting agent 0.5~0.8%, antifoaming agent
0.4~0.8%, curing agent 1~5%, cosolvent 2~40%.
Further, the polyaminoester microball grain size in the aqueous polyurethane is 700nm~10 μm.Preferably, the water
Property polyurethane be the aqueous polyurethane dispersion, in the particle size range, aqueous polyurethane dispersion film forming after in material
Surface has concave-convex alternate micron-nanometer micro-sphere structure, makes the depth at surface indentation position relatively larger than finger dermal papilla
The height of streakline so as to weaken the fingerprint trace left during finger contact coating surface, improves the anti-finger printing of coating.
Further, the aqueous polyurethane is polycarbonate polyurethane or the one or two of polyester polyurethane.
Preferably, the polycarbonate polyurethane is fatty poly-ester carbonate type polyurethane.Fatty poly-ester carbonate or polyester molecule
Structure assigns excellent wear-resisting, the suitable hardness of coating and good permeability.Compared with other polyurethane from delustring, poly- carbonic acid
Containing-[O-R-O-CO]-structure in the strand of ester structure, penylene base, ester group in strand make strand belong to rigid chain,
Glass transition temperature (Tg) 150 DEG C are up to, make it have excellent mechanical property, while urea groups in polyurethane structural (-
NHCONH-, cohesive energy > 36.5kJ/mol) and carbamate groups (- NHCOO-, cohesive energy 36.4kJ/mol) cohesive energy
Height is not easily broken after film forming, good with base material adhesive force, and the coating so as to be formed has excellent wearability and resistance to scraping.
Further, 10 DEG C of the minimum film formation temperature < of the organosilicon-modified acrylic, glass transition temperature < 10
℃.Preferably, the organosilicon-modified acrylic is organosilicon-modified acrylic emulsion.
Further, the organosilicon-modified acrylic is organic-silicon-modified self-crosslinking acrylic.Self-crosslinking acrylic into
The acrylic acid of reticular structure can be voluntarily cross-linked into during film between polymer chain, the mechanical strength of polymer can be improved.
Further, the organosilicon modifier in the organosilicon-modified acrylic is siliceous vinyl compound, is wrapped
Include vinyl alkyl trichlorosilane, vinyl alkyl methoxy silane, vinyl alkyl Ethoxysilane, the third oxygen of vinyl alkyl
One or more of base silane, vinyl alkyl polysiloxanes.Siliceous vinyl compound passes through free radical as modifying agent
In polymerization methods access self-crosslinking acrylic Type of Collective object, enable polymer that there is relatively low surface.
Further, the pH adjusting agent be ammonium hydroxide, triethylamine, triethanolamine, N, in N- dimethylethanolamines, AMP-95
It is one or more.The AMP-95 is the 2-amino-2-methyl-1-propanol containing 5% moisture.Using above-mentioned substance conduct
PH adjusting agent can adjust the acidity of coating, and act synergistically with aqueous polyurethane and organosilicon-modified acrylic, improve coating
Viscosity and film forming.
Further, the moistening flatting agent for organosilicon compound, one kind in acetylenic glycols ethoxy compound or
Two kinds.Using above-mentioned substance as moistening flatting agent, the surface tension of coating can be reduced, and with aqueous polyurethane and organosilicon
Modified acroleic acid acts synergistically, and improves the flatness and uniformity of coating.
Further, the antifoaming agent is one or both of organosilicon compound, acetylenic glycols ethoxy compound.
Using above-mentioned substance as antifoaming agent, the surface tension of coating can be reduced, foam is inhibited to generate, and with aqueous polyurethane and having
Machine fluorine-silicon modified acrylic acts synergistically, and improves the flatness and uniformity of coating.
Further, the curing agent be to carboxyl, hydroxyl, ketone carbonyl chemically reactive compound, including different
It is one or more in cyanate esters, adipic dihydrazide, aziridine cpd, carbodiimide compound.Using above-mentioned
Substance can promote polymerisation, and act synergistically with aqueous polyurethane and organosilicon-modified acrylic, improve and apply as curing agent
The hardness and adhesive force of layer.
Further, the cosolvent includes ethyl alcohol, ethylene glycol, isopropanol, N-Methyl pyrrolidone, N- N-ethyl pyrrole Ns
Alkanone, butyl glycol ether, butyl, propandiol butyl ether acetate, diethylene glycol ether, diethylene glycol ether acetate
In it is one or more.Using above-mentioned substance as cosolvent, act synergistically with aqueous polyurethane and organosilicon-modified acrylic,
Improve solubility.
The present invention also provides a kind of application methods of the anti-scraping coating of environmentally friendly resistance and fingerprint resistance, include the following steps:
S1:Each component is mixed according to mass percent of the present invention, is configured to coating aqueous dispersion;
S2:By the coating aqueous dispersion to base material;
S3:To being applied to the coating after base material into the preliminary drying that trip temperature is 60~110 DEG C, the time is 40s~5min;
S4:To pre-baked coating into trip temperature be 45~130 DEG C, the time be 1h~5d curing, so as to obtain environmental protection
Resistance and fingerprint resistance preventing from scraping film.
Relative to the prior art, coating of the invention meets the ripe industrialization process such as traditional roller coating, spraying, blade coating,
Application method is simple and practicable;Also, the coating of the present invention is suitable for polypropylene film (PP), polyester film (PET), polyvinyl chloride
A variety of film substrates such as film (PVC), polycarbonate film (PC), are respectively provided with good adhesion on all kinds of base materials, are applicable in
Property it is wide, have stronger practicability and commercial promise;In addition, the coating of the present invention is floride-free, non-volatility organic matter (VOC) discharge,
Free from extraneous odour generates, environmentally protective.
In order to better understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Description of the drawings
Fig. 1 is the structure diagram of environmentally friendly resistance and fingerprint resistance preventing from scraping film prepared by the present invention.
Fig. 2 is environmentally friendly resistance and fingerprint resistance preventing from scraping film and the anti-finger printing contrast test figure of common Matte film prepared by embodiment 1.
Specific embodiment
The anti-scraping coating of environmentally friendly resistance and fingerprint resistance of the present invention, by mass percentage including following component:Aqueous polyurethane 5~
90%, organosilicon-modified acrylic 5~90%, pH adjusting agent 0.1~1%, moistening flatting agent 0.1~0.8%, antifoaming agent 0.1
~1%, curing agent 1~5%, cosolvent 1~40%.
As what is advanced optimized, the anti-scraping coating of the environmental protection resistance and fingerprint resistance includes following component by mass percentage:Water
Property polyurethane 50~90%, organosilicon-modified acrylic 5~40%, pH adjusting agent 0.1~1%, moistening flatting agent 0.5~
0.8%, antifoaming agent 0.4~0.8%, curing agent 1~5%, cosolvent 2~40%.
Specifically, the aqueous polyurethane is aqueous from delustring dispersions of polyurethanes, preferably fatty poly-ester carbonate type
The one or two of polyurethane or polyester polyurethane, polyaminoester microball grain size therein are 700nm~10 μm.
Specifically, the organosilicon-modified acrylic be organosilicon-modified acrylic emulsion, preferably it is organic-silicon-modified from
Crosslinking acrylic acid emulsion, 10 DEG C of 10 DEG C of minimum film formation temperature <, glass transition temperature <, organosilicon modifier therein are
Siliceous vinyl compound, including vinyl alkyl trichlorosilane, vinyl alkyl methoxy silane, vinyl alkyl ethyoxyl
It is one or more in silane, vinyl alkyl npropoxysilane, vinyl alkyl polysiloxanes.
Specifically, the pH adjusting agent is ammonium hydroxide, triethylamine, triethanolamine, N, in N- dimethylethanolamines, AMP-95
It is one or more of.The moistening flatting agent is one or both of organosilicon compound, acetylenic glycols ethoxy compound.Institute
Antifoaming agent is stated as one or both of organosilicon compound, acetylenic glycols ethoxy compound.The curing agent is to carboxylic
Base, hydroxyl, ketone carbonyl chemically reactive compound, including isocyanate compound, adipic dihydrazide, aziridine chemical combination
It is one or more in object, carbodiimide compound.The cosolvent includes ethyl alcohol, ethylene glycol, isopropanol, N- methylpyrroles
Alkanone, N- ethyl pyrrolidones, butyl glycol ether, butyl, propandiol butyl ether acetate, diethylene glycol ether, two
It is one or more in ethylene glycol ether acetate.
A kind of application method of the anti-scraping coating of environmentally friendly resistance and fingerprint resistance of the present invention, includes the following steps:
(1) each component of coating is mixed according to mass percent of the present invention, is configured to coating aqueous dispersion.Tool
Body, each component of coating according to aqueous polyurethane, organosilicon-modified acrylic, pH adjusting agent, moistening flatting agent, antifoaming agent,
The order addition mixing of curing agent, cosolvent.
(2) by coating aqueous dispersion obtained by step (1) to base material.Specifically, using roller coating technology by the coating
Aqueous dispersion is transferred to base material, and wherein applicator roll is the steel anilox roll of chrome-faced, in base material PP, PET, PVC, PC film
It is a kind of.
(3) to being applied to the coating after base material into the preliminary drying that trip temperature is 60~110 DEG C, the time is 40s~5min.
(4) it is 45~130 DEG C into trip temperature to the coating after preliminary drying surface drying, the time is the curing of 1h~5d, so as to be crosslinked
Film forming obtains environmentally friendly resistance and fingerprint resistance preventing from scraping film.
Referring to Fig. 1, it is the structure diagram of environmentally friendly resistance and fingerprint resistance preventing from scraping film of the invention prepared, including base material 1 and apply
The anti-scraping coating 2 of environmentally friendly resistance and fingerprint resistance being distributed on base material 1.
With reference to embodiment, test and attached drawing, the present invention is described in further detail, but the embodiment party of the present invention
Formula is without being limited thereto.
Embodiment 1
Under the mixing speed of 600~1000rpm, by following mass fraction, each component sequentially adds, resistance to produced environment friendly
The anti-scraping coating aqueous dispersion of fingerprint:67 parts of aqueous polyurethane dispersion, 20 parts of organosilicon-modified acrylic emulsion, pH adjusting agent
0.5 part, 0.8 part of moistening flatting agent, 0.7 part of antifoaming agent, 2.2 parts of curing agent, 10 parts of cosolvent.
Using the method for scraper roller coating by the anti-scraping coating aqueous dispersion of the environmentally friendly resistance and fingerprint resistance of above-mentioned preparation in two-way drawing
Polypropylene stretched film (BOPP) surface;Preliminary drying is carried out to being applied to the coating after BOPP, preliminary drying temperature is 70 DEG C, time 60s;
Coating after preliminary drying surface drying is cured, curing temperature is 50 DEG C, time 2d, forms environmentally friendly resistance and fingerprint resistance preventing from scraping film.
Embodiment 2
Under the mixing speed of 800~1000rpm, by following mass fraction, each component sequentially adds, resistance to produced environment friendly
The anti-scraping coating aqueous dispersion of fingerprint:70 parts of aqueous polyurethane dispersion, 15 parts of organosilicon-modified acrylic emulsion, pH adjusting agent
0.3 part, 0.8 part of moistening flatting agent, 0.4 part of antifoaming agent, 2.5 parts of curing agent, 6 parts of cosolvent.
Using the method for scraper roller coating by the anti-scraping coating aqueous dispersion of the environmentally friendly resistance and fingerprint resistance of above-mentioned preparation in two-way drawing
Stretched polyester film (BOPET) surface;Preliminary drying is carried out to being applied to the coating after BOPET, preliminary drying temperature is 110 DEG C, and the time is
40s;Coating after preliminary drying surface drying is cured, curing temperature is 60 DEG C, time 1d, forms environmentally friendly resistance and fingerprint resistance preventing from scraping film.
Embodiment 3
Under the mixing speed of 700~800rpm, by following mass fraction, each component sequentially adds, resistance to produced environment friendly
The anti-scraping coating aqueous dispersion of fingerprint:75 parts of aqueous polyurethane dispersion, 15 parts of organosilicon-modified acrylic emulsion, pH adjusting agent
0.4 part, 0.9 part of moistening flatting agent, 0.8 part of antifoaming agent, 2.7 parts of curing agent, 6 parts of cosolvent.
Using the method for scraper roller coating by the anti-scraping coating aqueous dispersion of the environmentally friendly resistance and fingerprint resistance of above-mentioned preparation in two-way drawing
Stretched polyester film (BOPET) surface;Preliminary drying is carried out to being applied to the coating after BOPET, preliminary drying temperature is 100 DEG C, and the time is
50s;Coating after preliminary drying surface drying is cured, curing temperature is 45 DEG C, time 2d, forms environmentally friendly resistance and fingerprint resistance preventing from scraping film.
Test
The anti-scraping coating of environmentally friendly resistance and fingerprint resistance of embodiment 1-3 is tested for the property, test result is as shown in table 1.
The performance test results of the anti-scraping coating of environmentally friendly resistance and fingerprint resistance of 1 embodiment 1-3 of table
Test event |
Standard |
Embodiment 1 |
Embodiment 2 |
Embodiment 3 |
Viscosity (mPas) |
- |
380 |
365 |
385 |
Solid content (%) |
GB/T 1725 |
31 |
30 |
30 |
pH |
GB/T 8325 |
8.0 |
8.5 |
8.0 |
The environmentally friendly resistance and fingerprint resistance preventing from scraping film of embodiment 1-3 is tested for the property, test result is as shown in table 2.
The performance test results of the environmentally friendly resistance and fingerprint resistance preventing from scraping film of 2 embodiment 1-3 of table
Test event |
Standard |
Embodiment 1 |
Embodiment 2 |
Embodiment 3 |
Light transmittance (%) |
GB/T2410 |
90.0 |
90.5 |
90.1 |
Mist degree (%) |
GB/T2410 |
85.0 |
86.1 |
85.1 |
Glossiness (60 °) |
GB/T8807 |
1.9 |
2.0 |
1.7 |
Scratch resistant property (secondary/1000g) |
- |
1000 |
1000 |
1000 |
Wherein, scratch resistant property, which is tested, is specially:It, will with self-locking band using ZJ-339 type rubber alcohol abrasion-resistant testing machines
Four layers of non-dust cloth are fixed on one section of a diameter of 10mm of friction hammer, with the speed of about 30mm/s in scratch resistant film surface the same area
Linear reciprocation friction, and be primary back and forth with one, rub 1000 later preventing from scraping film tables under 1000g weights pressure
Face only has slight glossiness variation, and (60 °, glossiness changes<0.5), and after being placed at room temperature for 5h scratch completely disappears, and illustrates this
Coating prepared by invention has excellent scratch resistant property.
Other performance test of the present invention is carried out according to country or professional standard.From the test result in table as it can be seen that this hair
Bright environmentally friendly resistance and fingerprint resistance preventing from scraping film also has good permeability (light transmittance is more than 90%) and good matte effect (under 60 °
Glossiness < 2.5).
In addition, the environmentally friendly resistance and fingerprint resistance preventing from scraping film to embodiment 1 carries out anti-finger printing test, fingerprint liquid is pressed on finger
Film surface, and visual evaluation is done, test result is as shown in Figure 2.Wherein, A is state of the fingerprint in common dumb light film surface, and B is
Fingerprint is in the state of the film surface of the embodiment of the present invention 1, it is seen then that compared to normal film, stays in the film surface of the embodiment of the present invention 1
Fingerprint trace it is very shallow, illustrate that the coating for preparing of the present invention has good anti-finger printing.
Relative to the prior art, the invention has the advantages that:(1) present invention incorporates low surface energy polymerics
Chemical anti-pollution effect and the physics anti-pollution effect of micro/nano level concaveconvex structure, while coating good print is kept, make it
With excellent anti-finger printing and scratch resistant property.(2) the present invention overcomes surface roughness cause coating permeability problem, really
The printed matter protected after packaging fitting has no blind spot loss, and color rendition degree is good, while matte effect, good anti-finger printing and excellent
Scratch resistant property make coating high-grade packages printing coatings art have certain application prospect.(3) coating of the invention has water
Property, floride-free, VOC free discharge, no any peculiar smell generates, it is environmentally protective the advantages of.(4) coating of the invention meet traditional roller coating,
The ripe industrialization process such as spraying, blade coating, application method is simple and practicable, and the coating of the present invention can be used for PP, PET, PVC,
More kinds of film substrates of PC, are respectively provided with good adhesion, applicability is wide on all kinds of base materials.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that those of ordinary skill in the art are come
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.