CN106752754A - A kind of gum polyurethane protective film and preparation method thereof - Google Patents
A kind of gum polyurethane protective film and preparation method thereof Download PDFInfo
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- CN106752754A CN106752754A CN201710149855.4A CN201710149855A CN106752754A CN 106752754 A CN106752754 A CN 106752754A CN 201710149855 A CN201710149855 A CN 201710149855A CN 106752754 A CN106752754 A CN 106752754A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C09D163/10—Epoxy resins modified by unsaturated compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
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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
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
-
- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J2363/10—Epoxy resins modified by unsaturated compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C08J2475/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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Abstract
The invention discloses a kind of gum polyurethane protective film and preparation method thereof, the preparation method comprises the steps：In the thermoplastic polyurethane coating on base films Photocurable composition with gum, ultraviolet radiation-curable, you can；Described Photocurable composition includes the component of following parts by weight：10~20 parts of urethane acrylate, 10~20 parts of bisphenol-A epoxy acrylic resin, 2~4 parts of fluorine richness oligomer, 6~10 parts of polyfunctional acrylic ester, 1~3 part of PPG, 1~2 part of light trigger.Gum polyurethane protective film preparation method of the invention is simple, and obtained product scraping and wiping resistance performance is good, and coating has preferably hydrophobic oleophobic performance, and weather resistance is good.
Description
Technical field
The present invention relates to chemical materials and field of Environment Protection, more particularly to a kind of gum polyurethane protective film and its preparation side
Method.
Background technology
The existing multilayer film for including urethane material is widely used in automobile industry, but its surface crocking resistance is not
Good, weather resistance is bad, using periodic replacement is needed after certain hour, improves the use cost of product.
The content of the invention
The purpose of the present invention is exactly the defect in order to overcome above-mentioned prior art to exist, there is provided a kind of gum polyurethane protection
Film and preparation method thereof.Gum polyurethane protective film preparation method of the invention is simple, and obtained product scraping and wiping resistance performance is good,
Coating has preferably hydrophobic oleophobic performance, and weather resistance is good.
The invention provides a kind of preparation method of gum polyurethane protective film, it comprises the steps：With gum
Thermoplastic polyurethane (TPU) coating on base films Photocurable composition, ultraviolet radiation-curable, you can；
Described Photocurable composition includes the component of following parts by weight：
Preferably, the structural formula of described urethane acrylate is preferably：
Wherein, the integer of m=3~6, the integer of n=2~4, R1ForR2For-CH2CH2CH2-, R3
ForR4For-CH2CH2-, R5For-CH3Or H.
Preferably, the structural formula of described bisphenol-A epoxy acrylic resin is preferably：
Wherein, R1For methyl or
Hydrogen, R is the group of following structure：
N is 2~4 integer.
Preferably, described fluorine richness oligomer is preferably the mercaptan modified dissaving polymer of fluoroalkyl, be by
Fluoroalkyl mercaptan is grafted to superbrnaching end-hydroxy polymerization and obtains through maleic anhydride.Wherein, described fluoroalkyl mercaptan is preferably
It is five fluorine amyl hydrosulfides；Described dissaving polymer is preferably superbrnaching end-hydroxy polyester, superbrnaching end-hydroxy polyethers and end
The mixing of one or more in hydroxyl ultrabranching polyamide, such as PeStorp companies BoltornH series hyper-branched polyester,
BoltornP series hyperbranched polyethers, DSMHybraneB.V. companies HybranePS series ultrabranching polyamides.
Preferably, described polyfunctional acrylic ester is preferably the acrylate of 3~6 degrees of functionality；More preferably it is
Trimethylolpropane trimethacrylate, pentaerythritol triacrylate, glycerol propoxylate triacrylate, ethoxyquin trihydroxy methyl
Propane triacrylate, tetramethylol methane tetraacrylate, ethoxyquin tetramethylol methane tetraacrylate, the acrylic acid of dipentaerythritol six
The mixing of one or more in ester.
Preferably, described PPG is preferably polytetramethylene ether diol (PTMEG).
Preferably, described light trigger is preferably free radical photo-initiation, more preferably it is 2,4,6- trimethylbenzenes
One kind in formoxyl-diphenyl phosphate oxidation, 2- hydroxy-2-methyl -1- phenyl -1- acetone and 1- hydroxycyclohexyl phenyl ketones
Or it is various.
Preferably, the intensity of described ultraviolet light is preferably 30~40mW/cm2。
Preferably, the time of described ultraviolet radiation-curable is preferably 5~30 seconds.
Present invention also offers the gum polyurethane protective film as obtained in above-mentioned preparation method.
Fluorine richness oligomer, bisphenol-A epoxy acrylic resin and polyethers are introduced in the present invention, in Photocurable composition
Polyalcohol, on the one hand causes that coating has the effect of hydrophobic oleophobic, and on the other hand, coating has excellent washability, weatherability
Can, and the absorption affinity of coating is higher, mechanical strength is higher.
On the basis of common sense in the field is met, above-mentioned each optimum condition can be combined, and obtain final product each preferable reality of the present invention
Example.
Agents useful for same of the present invention and raw material are commercially available.
Positive effect of the invention is：
(1) attachment fastness with TPU basement membranes is preferable, difficult for drop-off；
(2) scraping and wiping resistance performance is good, and 0000# steel wires load 1kg rubs more than 1000 times without scar back and forth；
(3) coating obtained after photocuring has preferably hydrophobic oleophobic performance, and water contact angle is up to more than 110 degree；
(4) weather resistance is good, and after repeating weather-proof circulation 300 times, coating surface is not still observed and crackle or is partially stripped.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Apply among a scope.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or according to business
Product specification is selected.
Each component is in parts by weight in formula.
Embodiment 1
The preparation method of the gum polyurethane protective film of this example comprises the steps：In the thermoplastic polyurethane with gum
(TPU) coating on base films Photocurable composition, ultraviolet light (30mW/cm2) irradiation solidification 30s, you can；
Described Photocurable composition includes the component of following parts by weight：
The structural formula of the urethane acrylate is：
Wherein, m=3, n=4, R1ForR2For-CH2CH2CH2-, R3ForR4
For-CH2CH2-, R5For-CH3。
The structural formula of the bisphenol-A epoxy acrylic resin is：
Wherein, R1It is methyl, R is
The group of following structure：
N is 2.
The fluorine richness oligomer is the PeStorp companies BoltornH30 hyper-branched polyesters of five fluorine amyl hydrosulfide modifications.
The polyfunctional acrylic ester is trimethylolpropane trimethacrylate.
The PPG is polytetramethylene ether diol (PTMEG).
The light trigger is 2,4,6- trimethylbenzoy-dipheny phosphorous oxides.
Detect that the effect performance of ultraviolet curable coating is as follows：
(1) attachment fastness with TPU basement membranes is preferable, difficult for drop-off, and the test of hundred lattice reaches 5B；
(2) scraping and wiping resistance performance is good, and 0000# steel wires load 1kg rubs more than 1000 times without scar back and forth；
(3) coating obtained after photocuring has preferably hydrophobic oleophobic performance, and water contact angle is up to 111 degree；
(4) weather resistance is good, and after repeating weather-proof circulation 300 times, coating surface is not still observed and crackle or is partially stripped.
Embodiment 2
The preparation method of the gum polyurethane protective film of this example comprises the steps：In the thermoplastic polyurethane with gum
(TPU) coating on base films Photocurable composition, ultraviolet light (35mW/cm2) irradiation solidification 20s, you can；
Described Photocurable composition includes the component of following parts by weight：
The structural formula of the urethane acrylate is：
Wherein, m=5, n=3, R1ForR2For-CH2CH2CH2-, R3ForR4
For-CH2CH2-, R5It is H.
The structural formula of the bisphenol-A epoxy acrylic resin is：
Wherein, R1Be hydrogen, R be as
The group of lower structure：n
It is 3.
The fluorine richness oligomer is the PeStorp companies BoltornP500 hyperbranched polyethers of five fluorine amyl hydrosulfide modifications.
The polyfunctional acrylic ester is pentaerythritol triacrylate.
The PPG is polytetramethylene ether diol (PTMEG).
The light trigger is 2- hydroxy-2-methyl -1- phenyl -1- acetone.
Detect that the effect performance of ultraviolet curable coating is as follows：
(1) attachment fastness with TPU basement membranes is preferable, difficult for drop-off, and the test of hundred lattice reaches 5B；
(2) scraping and wiping resistance performance is good, and 0000# steel wires load 1kg rubs more than 1000 times without scar back and forth；
(3) coating obtained after photocuring has preferably hydrophobic oleophobic performance, and water contact angle is up to 113 degree；
(4) weather resistance is good, and after repeating weather-proof circulation 300 times, coating surface is not still observed and crackle or is partially stripped.
Embodiment 3
The preparation method of the gum polyurethane protective film of this example comprises the steps：In the thermoplastic polyurethane with gum
(TPU) coating on base films Photocurable composition, ultraviolet light (40mW/cm2) irradiation solidification 5s, you can；
Described Photocurable composition includes the component of following parts by weight：
The structural formula of the urethane acrylate is：
Wherein, m=6, n=2, R1ForR2For-CH2CH2CH2-, R3ForR4
For-CH2CH2-, R5For-CH3。
The structural formula of the bisphenol-A epoxy acrylic resin is：
Wherein, R1It is methyl,
R is the group of following structure：n
It is 4.
The fluorine richness oligomer is that the DSMHybraneB.V. companies HybranePS2550 of five fluorine amyl hydrosulfide modifications surpasses
Branched polyamide.
The polyfunctional acrylic ester is tetramethylol methane tetraacrylate.
The PPG is polytetramethylene ether diol (PTMEG).
The light trigger is 1- hydroxycyclohexyl phenyl ketones.
Detect that the effect performance of ultraviolet curable coating is as follows：
(1) attachment fastness with TPU basement membranes is preferable, difficult for drop-off, and the test of hundred lattice reaches 5B；
(2) scraping and wiping resistance performance is good, and 0000# steel wires load 1kg rubs more than 1000 times without scar back and forth；
(3) coating obtained after photocuring has preferably hydrophobic oleophobic performance, and water contact angle is up to 111 degree；
(4) weather resistance is good, and after repeating weather-proof circulation 300 times, coating surface is not still observed and crackle or is partially stripped.
Embodiment 4
The preparation method of the gum polyurethane protective film of this example comprises the steps：In the thermoplastic polyurethane with gum
(TPU) coating on base films Photocurable composition, ultraviolet light (35mW/cm2) irradiation solidification 10s, you can；
Described Photocurable composition includes the component of following parts by weight：
The structural formula of the urethane acrylate is：
Wherein, m=4, n=4, R1ForR2For-CH2CH2CH2-, R3ForR4
For-CH2CH2-, R5For-CH3。
The structural formula of the bisphenol-A epoxy acrylic resin is：
Wherein, R1It is methyl,
R is the group of following structure：
N is 3.
The fluorine richness oligomer is the PeStorp companies BoltornH30 hyper-branched polyesters of five fluorine amyl hydrosulfide modifications.
The polyfunctional acrylic ester is glycerol propoxylate triacrylate.
The PPG is polytetramethylene ether diol (PTMEG).
The light trigger is 2,4,6- trimethylbenzoy-dipheny phosphorous oxides.
Detect that the effect performance of ultraviolet curable coating is as follows：
(1) attachment fastness with TPU basement membranes is preferable, difficult for drop-off, and the test of hundred lattice reaches 5B；
(2) scraping and wiping resistance performance is good, and 0000# steel wires load 1kg rubs more than 1000 times without scar back and forth；
(3) coating obtained after photocuring has preferably hydrophobic oleophobic performance, and water contact angle is up to 112 degree；
(4) weather resistance is good, and after repeating weather-proof circulation 300 times, coating surface is not still observed and crackle or is partially stripped.
Weatherability method of testing in the present invention is as follows：Use Eye Super UV Tester W-151, Iwasaki
Electric Co., Ltd. carry out weather resistance test.One circulation is by being maintained at 63 DEG C of temperature, relative humidity 50%, illumination
50Mw/cm2And drench with rain 10 seconds/it is small 5 hours at present, and be maintained at 30 DEG C of temperature, relative humidity 95% lower 1 hour and constitute.Repeat
After above-mentioned weather-proof circulation 300 times, coating is observed with bore hole and under microscope (× 250), do not observe crackle or local stripping such as
From, then showing that coating surface is good, weather resistance is good.
Claims (10)
1. a kind of preparation method of gum polyurethane protective film, it is characterised in that comprise the steps：In the thermoplastic with gum
Property polyurethane coating on base films Photocurable composition, ultraviolet radiation-curable, you can；
Described Photocurable composition includes the component of following parts by weight：
2. preparation method as claimed in claim 1, it is characterised in that the structural formula of described urethane acrylate is：
Wherein, the integer of m=3~6, the integer of n=2~4, R1ForR2For-CH2CH2CH2-, R3ForR4For-CH2CH2-, R5For-CH3Or H.
3. preparation method as claimed in claim 1, it is characterised in that the structural formula of described bisphenol-A epoxy acrylic resin
For：Wherein, R1For methyl or
Hydrogen, R is the group of following structure：
N is 2~4 integer.
4. preparation method as claimed in claim 1, it is characterised in that described fluorine richness oligomer is that fluoroalkyl is mercaptan modified
Dissaving polymer；Wherein, described fluoroalkyl mercaptan is preferably five fluorine amyl hydrosulfides；Described dissaving polymer is preferable
Ground is mixed for one or more in superbrnaching end-hydroxy polyester, superbrnaching end-hydroxy polyethers and superbrnaching end-hydroxy polyamide
Close.
5. preparation method as claimed in claim 1, it is characterised in that described polyfunctional acrylic ester is preferably 3~6
The acrylate of degree of functionality.
6. preparation method as claimed in claim 5, it is characterised in that described polyfunctional acrylic ester is trihydroxy methyl third
Alkane triacrylate, pentaerythritol triacrylate, glycerol propoxylate triacrylate, ethoxyquin trimethylolpropane tris propylene
In acid esters, tetramethylol methane tetraacrylate, ethoxyquin tetramethylol methane tetraacrylate and dipentaerythritol acrylate one
Plant or several mixing.
7. preparation method as claimed in claim 1, it is characterised in that described PPG is polytetramethylene ether two
Alcohol.
8. preparation method as claimed in claim 1, it is characterised in that described light trigger is free radical photo-initiation, compared with
It is goodly 2,4,6- trimethylbenzoy-diphenies phosphorous oxide, 2- hydroxy-2-methyl -1- phenyl -1- acetone and 1- hydroxyl rings
One or more in hexyl phenyl ketone.
9. preparation method as claimed in claim 1, it is characterised in that the intensity of described ultraviolet light is 30~40mW/
cm2；The time of described ultraviolet radiation-curable is 5~30 seconds.
10. a kind of gum polyurethane protective film as obtained in the preparation method as any one of claim 1~9.
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| CN201710149855.4A CN106752754A (en) | 2017-03-14 | 2017-03-14 | A kind of gum polyurethane protective film and preparation method thereof |
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| CN201710149855.4A CN106752754A (en) | 2017-03-14 | 2017-03-14 | A kind of gum polyurethane protective film and preparation method thereof |
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Cited By (7)
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|---|---|---|---|---|
| CN107236429A (en) * | 2017-07-25 | 2017-10-10 | 佛山市正略信息科技有限公司 | A kind of diaphragm of hydrophobic oleophobic performance and preparation method thereof |
| CN107459304A (en) * | 2017-08-02 | 2017-12-12 | 合肥哲诚项目管理有限公司 | One kind building high rigidity composite material for decoration and preparation method thereof |
| CN107602031A (en) * | 2017-09-22 | 2018-01-19 | 惠州市盈盾晖实业有限公司 | A kind of mould proof heat-insulating fireproof door component and preparation method thereof |
| CN108659698A (en) * | 2018-04-12 | 2018-10-16 | 广东鼎立森新材料有限公司 | A kind of ultraviolet-curing paint and its application method of automobile painting surface protective film |
| CN112251161A (en) * | 2020-11-01 | 2021-01-22 | 浙江世窗光学薄膜制造有限公司 | Elastomer protective film with patterns and preparation method thereof |
| CN112321875A (en) * | 2020-11-01 | 2021-02-05 | 浙江世窗光学薄膜制造有限公司 | Self-repairing elastomer protective film with patterns and preparation method thereof |
| CN113061390A (en) * | 2021-04-30 | 2021-07-02 | 炫杰复合材料（上海）有限公司 | Anti-doodling and anti-sticking coating and preparation method thereof |
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| CN107236429A (en) * | 2017-07-25 | 2017-10-10 | 佛山市正略信息科技有限公司 | A kind of diaphragm of hydrophobic oleophobic performance and preparation method thereof |
| CN107459304A (en) * | 2017-08-02 | 2017-12-12 | 合肥哲诚项目管理有限公司 | One kind building high rigidity composite material for decoration and preparation method thereof |
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