CN110373102A - A kind of protective coating, protection bamboo wood and preparation method thereof - Google Patents
A kind of protective coating, protection bamboo wood and preparation method thereof Download PDFInfo
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- CN110373102A CN110373102A CN201910711873.6A CN201910711873A CN110373102A CN 110373102 A CN110373102 A CN 110373102A CN 201910711873 A CN201910711873 A CN 201910711873A CN 110373102 A CN110373102 A CN 110373102A
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- coating
- bamboo wood
- organic fluorine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
Abstract
The present invention provides a kind of protective coatings, protection bamboo wood and preparation method thereof, belong to bamboo wood protection technology field.The protective coating is by including that the raw material of organic fluorine resin coating and isocyanate curing agent is prepared；The side group of the strand of organic fluorine contains hydroxyl in the organic fluorine coating.Hydroxyl in organic fluorine coating of the invention is reacted with the isocyanate group in isocyanate curing agent, and the easy coating of obtained coating is coated to bamboo material surface, and obtained coating hardness is high, adhesive force is excellent, transparency is high, mist degree is low.In addition, protective coating provided by the invention is free of heavy metal and formaldehyde, after good solidification, without any penetrating odor.Protection bamboo wood of the invention has good anti-mildew, resistance to daylight and ultraviolet capability.In addition, also having good water-fast and acid resistance.The present invention also provides a kind of preparation method for protecting bamboo wood, simple process is easy to realize industrial production.
Description
Technical field
The present invention relates to bamboo wood protection technology fields more particularly to a kind of protective coating, protection bamboo wood and preparation method thereof.
Background technique
Bamboo wood is a kind of reproducible green material, it have the characteristics that it is at low cost, become a useful person it is fast, environmentally friendly；Also have
Have the advantages that high specific strength, good toughness, surface hardness are big, certain mechanical properties are even better than engineering plastics；There is color simultaneously
The characteristics of soft, clean mark in pool, to user with good vision and touch feeling.
The bamboo wood used outdoors will mainly be subjected to sunlight (especially ultraviolet light), rainwater, heat, oxygen, mould and damage by worms
Test.
In bamboo wood probably containing 55% cellulose, 25% hemicellulose, 20% lignin, there are also a small amount of extraction
The substances such as object and ash content.Cellulose therein forms microfibre, constitutes the mesh skeleton of fiber finer cell wall, and hemicellulose and
Lignin is then to fill the binder and filler between microfibre between the fibers.
Ultraviolet ageing is after bamboo wood absorbs ultraviolet light, because containing a large amount of in lignin and a small amount of extract in bamboo wood
Hydroxyl, alcoholic extract hydroxyl group, phenolic hydroxyl group, these functional groups and phenyl ring generate the pi-conjugated system of p- and the pi-conjugated system of π-, these conjugated bodies
System allows bamboo wood to absorb a large amount of luminous energy, and the molecule of bamboo wood and atom is made to be in upper state, the molecule of upper state or atom pole
It is easy by light degradation.In addition, outdoors in use, surface forms radical type substance, in oxygen after bamboo wood absorption ultraviolet light
In the presence of gas and moisture, peroxide species are formed.Radical type substance and peroxide species can trigger a system
The molecular chain rupture of column makes the stability of bamboo wood and durable to make the lignin in bamboo wood, cellulose and hemicellulose degradation
Property is largely influenced.The depth that ultraviolet light penetrates bamboo wood is about 75 μm, but free radical can be under the action of luminous energy
2540 μm are transmitted to, destructive power is surprising.
On the one hand the rotten mildew of bamboo wood is because not only containing a large amount of cellulose, hemicellulose, lignin in bamboo wood, also
The nutriments such as carbohydrate, protein, starch containing sub-fraction, these nutriments are provided to the enough nutrition of rot fungi
Source.It on the other hand is because bamboo wood has hygroscopicity, the free hydroxyl group on bamboo cellulose is in intermolecular force and hydrogen bond force
Under the action of in air moisture formed absorption water, wherein the adsorption capacity of hemicellulose is most strong, and moist environment is to mould
Good environment is provided, while moisture is very big on culm property influence, moisture will affect the mechanical property of bamboo wood.
Damage by worms and be primarily due to bamboo wood and contain a large amount of vascular bundle, there is conduit in vascular bundle again, moth oviposition when
It waits and injects worm's ovum in bamboo by conduit, provide the source of worm's ovum in this way to damage by worms.Secondly also in that bamboo wood has moisture absorption
Property, cause the water content of bamboo wood to be well suited for the hatching and growth of worm's ovum.
Currently, solve bamboo wood, the mildew of bamboo materials such as Recombined bamboo, damage by worms, the mode of ultraviolet ageing may be summarized to be painting
Decorations processing and chemical modification two major classes.Covering with paint processing, which is broadly divided into, covers with paint, lacquer, colour wash, etc. wood wax oil, opaque coating, ultraviolet absorber coating
Deng can achieve masking ultraviolet light and the purpose of waterproof.Chemical modification mainly has acetylation process, etherification process, isocyanates
It is modified.Hydroxyl after processing in functional components is substituted, its surface is made to be not susceptible to photooxidation reaction.But these methods are big absolutely
Partial coating is single macromolecule component, and ultraviolet aging resistance ability is limited；Secondly, the overwhelming majority has used water paint,
Although environmentally friendly, outdoor water-resistant capacity is too poor, under the invasion of water, it is easy to hydrolysis falls off from protected object, thus
There is no protective effect.
Summary of the invention
The purpose of the present invention is to provide a kind of protective coatings, by it coated on the coating hardness after bamboo material surface, obtained
Height, adhesive force are excellent, have good anti-mildew, water-fast, resistance to daylight and ultraviolet capability.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of protective coatings, by the raw material system including organic fluorine resin coating and isocyanate curing agent
It is standby to obtain；The side group of the strand of organic fluorine contains hydroxyl in the organic fluorine coating.
Preferably, the mass ratio of the organic fluorine coating and isocyanate curing agent is (6~7): 1.
Preferably, preparing raw material further includes organic solvent.
The present invention provides a kind of protection bamboo woods, and including bamboo wood and positioned at the protective coating of bamboo material surface, the protection is applied
Layer protective coating as described in above scheme is formed.
The present invention provides the preparation methods that bamboo wood is protected described in above scheme, comprising the following steps: will include Organic fluoride
The mixing of the raw material of cold coating and isocyanate curing agent, forms protective coating；The protective coating is coated in bamboo material surface,
Obtain protection bamboo wood.
Preferably, the bamboo wood is the bamboo wood by charing process.
Preferably, the number of plies of coating be one or more layers, every layer coating with a thickness of 25~40 μm.
It preferably, will include organic fluorine resin coating and different when protective coating is when to prepare raw material further include organic solvent
The mode of the raw material mixing of cyanate curing agent are as follows: add isocyanate curing agent into organic fluorine coating, then add
Organic solvent.
It preferably, further include that bamboo wood is successively dried and is polished before the coating.
It preferably, further include that the bamboo wood after coating is dried after the coating.
The present invention provides a kind of protective coatings, by the raw material system including organic fluorine resin coating and isocyanate curing agent
It is standby to obtain；The side group of the strand of organic fluorine contains hydroxyl in the organic fluorine coating.Organic fluoride tree of the invention
Hydroxyl in grease coating material is reacted with the isocyanate group in isocyanate curing agent, and the easy coating of obtained coating is coated to
Bamboo material surface, obtained coating hardness is high, adhesive force is excellent, transparency is high, mist degree is low.In addition, protective coating provided by the invention
Without heavy metal and formaldehyde, after good solidification, without any penetrating odor.Protective coating of the invention is coated to bamboo wood table
Face, obtained protection bamboo wood have good anti-mildew, resistance to daylight and ultraviolet capability.In addition, also have it is good it is water-fast and
Acid resistance.
The present invention also provides a kind of preparation method for protecting bamboo wood, simple process is easy to realize industrial production.
Detailed description of the invention
Fig. 1 is that the protection bamboo wood water of embodiment 1 impregnates the micro- comparison diagram of front and back；
Fig. 2 is micrograph of the protection bamboo wood of embodiment 1 after sour water impregnates；
Fig. 3 is the tensile sample curve that embodiment 1 protects bamboo wood sample；
Fig. 4 is the DSC curve of the protection bamboo wood of embodiment 1；
Fig. 5 is the uv-spectrogram of the protection bamboo wood of embodiment 1；
Fig. 6 is the comparison diagram before and after the protection bamboo wood hydrothermal aging of embodiment 1.
Specific embodiment
The present invention provides a kind of protective coatings, by the raw material system including organic fluorine resin coating and isocyanate curing agent
It is standby to obtain；The side group of the strand of organic fluorine contains hydroxyl in the organic fluorine coating.
In the present invention, the organic fluorine coating refers to the coating using organic fluorine as base-material, described organic
Fluororesin refers to the general designation of polymer fluorine-containing on strand.The present invention is to the type of the organic fluorine coating without spy
It is different to require, as long as organic fluorine coating well known in the art can satisfy in base-material on the strand of organic fluorine in side group
Contain hydroxyl.The present invention does not have particular/special requirement to the source of the organic fluorine coating, using those skilled in the art
Well known commercial goods.
In the present invention, the isocyanate curing agent is preferably HDI trimer, MDI or TDI.
In the present invention, the mass ratio of the organic fluorine coating and isocyanate curing agent is preferably (6~7): 1,
Further preferably 7:1.
In the present invention, it is also preferable to include organic solvents for the raw material for preparing of the protective coating.In the present invention, described to have
Solvent is preferably ethyl acetate；The mass ratio of the organic solvent and organic fluorine coating is preferably 8:(6~7).
The present invention provides a kind of protection bamboo woods, and including bamboo wood and positioned at the protective coating of bamboo material surface, the protection is applied
Layer protective coating as described in above scheme is formed.
The present invention does not have particular/special requirement to the thickness of the protective coating, can be adjusted according to actual needs.Adjustment according to
According to principle be: protective coating is thicker, and coating is finer and close, and ageing-resistant performance is better, but prepares coating time-consuming is longer simultaneously.
The present invention provides the preparation methods that bamboo wood is protected described in above scheme, comprising the following steps: will include Organic fluoride
The mixing of the raw material of cold coating and isocyanate curing agent, forms protective coating；The protective coating is coated in bamboo material surface,
Obtain protection bamboo wood.
The present invention will be mixed including the raw material of organic fluorine resin coating and isocyanate curing agent, form protective coating.
It in the present invention, will include organic fluorine resin coating when protective coating is when to prepare raw material further include organic solvent
The mode mixed with the raw material of isocyanate curing agent is preferred are as follows: isocyanate curing agent is added into organic fluorine coating,
Then organic solvent is added, further preferably adds isocyanate curing agent into organic fluorine coating, stirring 2~
Then 4min adds organic solvent, stir 4~6min.The present invention does not have particular/special requirement to the rate of the stirring, can be realized
Uniformly mixing.After organic fluorine coating of the invention is contacted with isocyanate curing agent, it may occur that hydroxyl and isocyanic acid
The reaction of ester group, obtain having certain molecular weight can solidify under heat condition or cured protection applies under room temperature
Material.Mixed system is preferably stood 15min by the present invention, obtains protective coating.Standing of the present invention advantageously reduces anti-
The bubble in coating is protected, the continuation of organic fluorine coating reacts with isocyanate curing agent during standing, but reacts life
At molecular weight it is small, do not influence painting effect and final performance within a certain period of time.
After obtaining protective coating, the protective coating is preferably coated in bamboo material surface by the present invention, obtains protection bamboo wood.
In the present invention, the bamboo wood is preferably the bamboo wood for passing through charing process.The present invention passes through charing process to described
The source of bamboo wood there is no particular/special requirement, commercial goods well known in the art can be used or use charing method well known in the art
Processing obtains.Bamboo wood of the invention passes through charing process, can kill the worm's ovum inside bamboo wood, increases surface roughness, and increase
Strong paint adhesion.Before coating, it is also preferable to include bamboo wood is successively dried and is polished by the present invention.In the present invention, described
Dry temperature is preferably 35~45 DEG C, and further preferably 40 DEG C；The dry time is preferably 5~7h, further preferably
6h.The polishing preferably uses the sand paper of 60~600 mesh, the further preferably sand paper of 200 mesh, and polishing of the present invention can be with
The surface energy for changing bamboo wood, increases Bamboo Surface Roughness, to improve the adhesive force of protective coating.
In the present invention, the number of plies of the coating is preferably one or more layers, and the thickness of every layer of coating is preferably 25~40 μ
m；The thickness of the coating can be adjusted according to actual needs, and the principle for adjusting foundation is: protective coating is thicker, and coating more causes
Close, ageing-resistant performance is better, but prepares coating time-consuming is longer simultaneously.The present invention does not have particular/special requirement to the mode of the coating,
It is specifically as follows but is not limited to the modes such as spraying, brushing.Hydroxyl in coating procedure of the present invention in organic fluorine coating
Base continuation is reacted with isocyanate curing agent generates main component as the coating containing carbamate groups.
After coating, it is also preferable to include the bamboo wood after coating is dried by the present invention.In the present invention, the drying is preferred
To dry in the shade or drying, the temperature dried in the shade is preferably 20~30 DEG C, and the time dried in the shade is preferably 25~45min；The drying
Temperature be preferably 50~70 DEG C, the time of drying is preferably 8~15min.After drying of the present invention, formed in bamboo material surface
The dry protective coating of layer of surface.
Protective coating provided by the invention, protection bamboo wood and preparation method thereof are carried out specifically below with reference to embodiment
It is bright, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
The ratio that mass ratio according to the coating of organic fluorine containing pendant hydroxyl group, isocyanate curing agent and solvent is 7:1:8,
140g organic fluorine coating is first instilled into beaker, 20g isocyanate curing agent (selection HDI trimer) is added dropwise and stirs afterwards
Next 3min adds 160g ethyl acetate solvent and stirs 5min, the coating after stirring is stood 15min, obtains protective coating.
The moso bamboo by charing process being commercially available is sawed-off according to 100mm × 20mm × 8mm specification, it is placed in electric heating
Constant temperature blast drying oven, temperature are adjusted to 40 DEG C, dry 6h.After the polishing of 200 mesh sand paper, with hairbrush by configured protective coating
Dress is coated on the bamboo chip after dry and polishing, and protection bamboo wood is obtained after dry, and coating layer thickness is 35 μm.
Performance test
Basic performance test
The every basic performance for the protective coating that embodiment 1 is formed is characterized, the results are shown in Table 1.
The basic performance of 1 embodiment of table, 1 coating
In table 1, surface drying time refers to the surface of the paint film dry time, does solid work required for the time refers to that coating is fully cured
Time.
As shown in Table 1, the protective coating hardness formed using protective coating of the invention is relatively high, is 2H,
Illustrate that protective coating of the invention has the performances such as excellent wear resistance, rub resistance, scratch-resistant, impact resistance.Secondly,
Adhering to grade is 1 grade, illustrates that coating is firmly combined with substrate, not easily to fall off.In addition, the light transmittance of light transmittance test coating is
95.9%, haze value is only 3.44, illustrates coating transparency with higher, can retain the texture of bamboo wood to the good of people
Visual experience.Finally, surface drying time is that do solid work the time be 6h to 30min at 25 DEG C of this coating, the surface drying time of coating and when doing solid work
Between it is all shorter, shorter drying time can be reduced cost of labor when brushing, speed up the work, relative to same type coating ten
Divide and is suitble to carry out coating outdoors.All things considered, the coating hardness is high, adhesive force is excellent, transparency is high, mist degree is low, easy coating.
Water resistance and antifungi test
The water resistance of coating refers to coating under soaked for a long time, and the intensity of coating is unobvious to be declined and be not destroyed.It will
Wherein 2 protection bamboo woods that embodiment 1 obtains impregnate 63 days in water, and soaking time is March 25 days to 2019 January in 2019
28 days, wherein a piece of scratched before immersion with pencil；Not soaked protection bamboo wood is placed 63 days as control simultaneously.
After impregnating 63 days, observes in the water for impregnating bamboo wood, grown mould, and be attached on coating, but this is mould
Bacterium is easy to rinse well with water, and any trace is not left on coating.This is because the organic fluorine of bamboo material surface applies
Material has not long mould, has the reason of certain self-cleaning, illustrates that the coating can be effectively prevented the erosion of microorganism and fungi.
Micro- sem observation is carried out to the protection bamboo wood rinsed well after not impregnating and impregnating, as a result as shown in Figure 1.In Fig. 1,
(a) it is the microphoto of 5 times of amplification after immersion, is (b) microphoto of 20 times of amplification after immersion, (c) is the bamboo wood after scratching
Amplify 5 times of microphoto after immersion, (d) is the microphoto of 20 times of amplification after the bamboo wood immersion after scratching, is (e) not soaked
Protection bamboo wood.By (a) and (b) in Fig. 1 it is found that after impregnating 63 days, there is not wrinkling in coating, but finds in coating
There is more vesicle, not soaked bamboo wood compares with figure (e), judgement should be water penetration enter protective coating formed it is small
Bubble, but vesicle, which becomes big bubble there is no connection fusion, forms colored halation and shade, and it is good to illustrate that coating has
Water resistance.It can be seen that, around there are little water and gas to enter the halation and shade to be formed from the coating that (c) and (d) is scratched,
At the edge scratched, since the immersion of water leads to coating, there is a phenomenon where swellings to wrinkle, but there is no edges for the water that makes discovery from observation
The place of scratching continue to diffuse into entire coating, only penetrate into around it is lesser one circle, to sum up judgement it can be concluded that coating have compared with
Strong to resist water infiltration capacity, the water resistance of coating meets uses needs outdoors.
Acid resistance test
Corrosion for simulating natural environment acid rain to paint film, it is 5 that the protection bamboo wood of embodiment 1 is placed in pH by the present invention
Sour water impregnates 63 days, carries out micro- sem observation to the bamboo wood after immersion, as a result as shown in Figure 2.In Fig. 2, (a) is to amplify after impregnating
5 times of microphoto is (b) microphoto of 20 times of amplification after immersion, figure it is seen that sour water, which only enters, applies break
A ringlet forms halation and corrugation around at mouthful, but sour water is not diffused into Bulk coat along coating mouth, and coating is in length
To coating, too big corrosive effect, water are not spread along coating mouth yet under phase sour water impregnates, generally this coating
Acid resistance it is very excellent.
The Mechanics Performance Testing of coating
The expanded by heating that absorbs water can occur for use under conditions of damp and hot of outdoor bamboo wood, and expansion rate of water absorption is excessive to be may result in
The rupture of coating makes coating that can not protect bamboo wood, therefore the tensile mechanical properties of testing coating calculate the elongation at break of coating
The test important as one.Since the coating adhesion is very good, it is coated on equal nothing on glass or other hard substrates
Method completely strips, therefore can not directly and accurately test out its tensile strength and elongation at break.Select paper as substrate, due to
Paper composition containing cellulose is similar with bamboo wood, therefore can preferable stretching mechanical effect of the simulation coating on bamboo.It is right
The protective coating of embodiment 1 carries out tensile property test, and as a result as shown in figure 3, in Fig. 3,1~5 is the stretching of longitudinal 5 battens
Test curve, 6~9 be the extension test curve of laterally 4 battens, and 10 be the stress strain curve of paper；Coating can be calculated from Fig. 3
Tensile strength and elongation at break, strength of coating can be calculated with formula 1, and σ t is tensile strength (MPa) in formula, and p is peak load
(N), b is specimen width (mm), and d is coating layer thickness (mm)；△ L is extended length in formula 1, and L is former long.It calculates and takes each sample
Average value after obtain longitudinal σ t=101.56MPa, elongation at break ≈ 5%, lateral σ t ≈ 71.87MPa, elongation at break ≈
8%.The strength rigid of coating is big and has certain ductility, according to the maximum expansion rate of water absorption for consulting soaked 132 hours bamboo woods
2%, the two compare coating vertical or horizontal elongation at break it is all bigger than the expansion rate of water absorption of bamboo wood, mechanical property symbol
Close requirement.It is impregnating, in damp and hot and freezing experiment, without discovery coating breaks down phenomenon, is also demonstrating this point.
σ t=p/ (b × d) formula 1
Coating thermal performance test
Fig. 4 is the DSC curve of coating, it can be seen that its glass transformation temperature region is 38.1 DEG C to 48.0 DEG C.It will protection
Bamboo wood, which is placed in 50 DEG C of baking oven, finds that coating starts to soften but have no effect on routine use slightly, nor affects on coating to bamboo
The protection of material has good heat resistance this is because the coating height is crosslinked.Further, it places it in 100 DEG C of boiling water and boils
3 hours, be also only to feel like jelly, and has no other destructions.Freezer compartment of refrigerator is placed it in, also has no that it has any phenomenon that becomes fragile.Cause
This, which can resist the cold in summer sweltering heat and winter.
The ultraviolet performance test of coating
Contain ultraviolet light in sunlight, and be easy to happen ultraviolet ray ageing in bamboo wood outdoor aging, bamboo wood color is caused to become
Change, intensity decline, therefore we will make bamboo wood not by ultraviolet photo damage as far as possible.It is mainly base that coating, which protects the protection mechanism of bamboo wood,
In absorbing and dispersing harmful ultraviolet radioactive, keep bamboo wood few by ultraviolet ageing as far as possible before coating is destroyed.It can from Fig. 5
Coating is mainly wavelength between 210~377nm to ultraviolet absorption region out, and the ultraviolet light in sunlight is 200 in wavelength
Harm between~400nm is big, and wavelength is shorter, and energy is bigger, and destructive power is stronger, and the absorption region of coating is relatively wide, theoretically can
Enough effective destructions for reducing 210~377nm of wavelength ultraviolet light to bamboo wood, can be reduced ultraviolet light aging caused by bamboo wood.
Simulate hydrothermal aging
The glass transition temperature of coating is 38 DEG C~48 DEG C as can be seen from Figure 4, should be no more than using temperature under normal circumstances
48 DEG C, it is contemplated that coating tests the time of aging too long at 48 DEG C, so the present invention is simulated by using 100 DEG C of hot water
Accelerated ageing process recycles aging process with reference to using WCAMA six:
Material: the protection bamboo wood of embodiment 1 10.
Method: it is recycled by WCAMA (The West CoastAdhesive ManufacturesAssociation) six
Aging process carries out accelerated ageing processing to bamboo wood:
1. 25 DEG C are impregnated 30 minutes；
2. boiling 3 hours；
3. 105 DEG C drying 20 hours.
Totally six circulations take out a piece of reservation, therefrom after each free period to observe bamboo wood after each circulation
Variation, remaining 4 bamboo woods after six circulations.
Fig. 6 is the comparison diagram of hydrothermal aging simulation front and back after bamboo wood brush coating, wherein (a) is the picture before aging,
It (b) is the picture after aging process, (a) is it can be seen that bamboo wood aging Front-coating mirror is bright, from (b) it can be seen that aging from Fig. 6
Bamboo wood brightness is slightly dimmed afterwards, in addition has a small amount of steam to penetrate into bamboo wood.But coating is still securely attached on bamboo wood, performance
Test has no significant degradation, illustrates that hydrothermal aging test is smaller to breakdown of coating, coating still has good protection to bamboo wood.
Embodiment 2
The ratio that mass ratio according to the coating of organic fluorine containing pendant hydroxyl group, isocyanate curing agent and solvent is 6:1:8,
Beaker first is added in 120g organic fluorine coating, 20g TDI is added as 3min is stirred after isocyanate curing agent, next
It adds 160g ethyl acetate solvent and stirs 5min, the coating after stirring is stood into 15min, obtains protective coating.
Moso bamboo without carbonization treatment is sawed-off according to 100mm × 20mm × 8mm specification, it is dry to be placed in electric heating constant temperature air blast
Dry case, temperature are adjusted to 40 DEG C, dry 6h.After the polishing of 200 mesh sand paper, configured protective coating dress is coated in drying with hairbrush
And on the bamboo chip after polishing, one layer of protective coating is formed in bamboo material surface after drying, while obtaining protection bamboo wood, protective coating is thick
Degree is 30 μm.
The protection bamboo wood of embodiment 2 is tested for the property according to the method for embodiment 1, as the result is shown: 2 coating of embodiment
Hardness it is high, adhesive force is excellent, transparency is high, mist degree is low, easy coating；Coating has good water resistance and antifungi ability, good
Good acid resistance, excellent mechanical property, anti-ultraviolet ageing performance and heat and moisture aging resistance.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of protective coating, which is characterized in that prepared by the raw material for including organic fluorine resin coating and isocyanate curing agent
It obtains；The side group of the strand of organic fluorine contains hydroxyl in the organic fluorine coating.
2. protective coating according to claim 1, which is characterized in that the organic fluorine coating and cured with isocyanates
The mass ratio of agent is (6~7): 1.
3. protective coating according to claim 1 or 2, which is characterized in that preparing raw material further includes organic solvent.
4. a kind of protection bamboo wood, which is characterized in that including bamboo wood and positioned at the protective coating of bamboo material surface, the protective coating by
The described in any item protective coatings of claims 1 to 3 are formed.
5. protecting the preparation method of bamboo wood described in claim 4, which comprises the following steps: will include Organic fluoride tree
The mixing of the raw material of grease coating material and isocyanate curing agent, forms protective coating；The protective coating is coated in bamboo material surface, is obtained
To protection bamboo wood.
6. preparation method according to claim 5, which is characterized in that the bamboo wood is the bamboo wood by charing process.
7. preparation method according to claim 5, which is characterized in that the number of plies of coating is one or more layers, and every layer coats
With a thickness of 25~40 μm.
8. preparation method according to claim 5, which is characterized in that when the raw material for preparing of protective coating further includes organic molten
It, will be including the mode of the raw material mixing of organic fluorine resin coating and isocyanate curing agent are as follows: to organic fluorine coating when agent
Middle addition isocyanate curing agent, then adds organic solvent.
9. preparation method according to claim 5, which is characterized in that further include successively being carried out to bamboo wood before the coating
Dry and polishing.
10. preparation method according to claim 5, which is characterized in that further include to the bamboo wood after coating after the coating
It is dried.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910711873.6A CN110373102A (en) | 2019-08-02 | 2019-08-02 | A kind of protective coating, protection bamboo wood and preparation method thereof |
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| CN201910711873.6A CN110373102A (en) | 2019-08-02 | 2019-08-02 | A kind of protective coating, protection bamboo wood and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104356914A (en) * | 2014-11-28 | 2015-02-18 | 明冠新材料股份有限公司 | Solar back panel transparent polyurethane paint and preparation method thereof |
| CN109370328A (en) * | 2018-08-31 | 2019-02-22 | 广德竹之韵工艺品厂 | A kind of bamboo product surface abrasion resistance coating |
-
2019
- 2019-08-02 CN CN201910711873.6A patent/CN110373102A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104356914A (en) * | 2014-11-28 | 2015-02-18 | 明冠新材料股份有限公司 | Solar back panel transparent polyurethane paint and preparation method thereof |
| CN109370328A (en) * | 2018-08-31 | 2019-02-22 | 广德竹之韵工艺品厂 | A kind of bamboo product surface abrasion resistance coating |
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Application publication date: 20191025 |
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