CN110343459A - A kind of selfreparing polyurethane water-proof paint, preparation method and application - Google Patents
A kind of selfreparing polyurethane water-proof paint, preparation method and application Download PDFInfo
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- CN110343459A CN110343459A CN201910507728.6A CN201910507728A CN110343459A CN 110343459 A CN110343459 A CN 110343459A CN 201910507728 A CN201910507728 A CN 201910507728A CN 110343459 A CN110343459 A CN 110343459A
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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
- C09D175/08—Polyurethanes from polyethers
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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
- C09D7/61—Additives non-macromolecular inorganic
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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
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- 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
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- 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
- C08L2205/05—Polymer mixtures characterised by other features containing polymer components which can react with one another
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- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a kind of selfreparing polyurethane water-proof paint, preparation method and applications, and mixing is stirred at room temperature in the epoxy resin under isopropanol and molten condition, obtains solution A；High water-absorption fiber is added in solution A, is dispersed with stirring 2~3h at room temperature, obtains high water-absorption fiber/epoxy resin covering liquid B；First component of two component polyurethane and the second component are uniformly mixed by setting ratio, form mixed liquor C；In whipping process, high water-absorption fiber/epoxy resin covering liquid B is added into mixed liquor C, continues to stir；Continue to add cumyl peroxide, dibenzoyl peroxide, zinc oxide, 20~30min of stirring is uniformly mixed, and obtains the homogeneous liquid D of selfreparing polyurethane, as required water-repellent paint.Water-repellent paint of the invention has good self-healing properties, and anti-puncture, cracking resistance seam is damaged, and energy self-regeneration in the short time, the extending life period improves leakage performance, and manufacture craft is simple, and site operation is easy.
Description
Technical field
The present invention relates to a kind of building water-proof paints, and in particular to a kind of selfreparing polyurethane water-proof paint and its preparation side
Method.
Background technique
Waterproof roll is widely used in the waterproof in the fields such as building, roofing, underground and tunnel, highway, antiseepage, but
Its construction requirement is relatively high, has been easy to be connected seam easily generation leakage between bubble generation and coiled material now between coiled material and ground
As having seriously affected construction quality.Compared with waterproof roll, high molecular water-proof paint is main film forming with macromolecule polymeric material
Substance, by the way that additive and shaped catalyst waterproof coating is added, because construction is simple, influenced by external environment condition it is smaller and standby
Favored.
Water-repellent paint common at present has polyurethane water-proof paint, acrylate waterproof paint, epoxy resin waterproof coating
With organic silicon water-proofing coating etc..Wherein, polyamine ester paint due to its good-extensibility, tensile strength is high, caking property is good, waterproof is without connecing
Seam deforms the features such as adaptable, working drawing review facilitates to basic crack, becomes market and mainly uses one of water-repellent paint.
However, occur crack in use, breakage is the problem of water-repellent paint not can avoid, such issues that encounter,
Waterproof roll or water-repellent paint can only be mostly re-lay, a large amount of manpower and material resources is consumed, leverages construction quality and life
Quality.
To solve the above problems, needing to realize selfreparing in situ crack, to extend the life cycle of waterproof coating.
Publication date is that the Chinese invention patent CN106010188A on October 12nd, 2016 discloses the polyurethane of selfreparing
Water-repellent paint and preparation method.By weight percentage, polyurethane waterproof material 70-90%, microencapsulation material 10-30%, it
Preparation method includes the following steps: 1) that ethyl cellulose is soluble in water, and the temperature of water is 65-75 DEG C, and being stirred makes it
At liquid, ethyl cellulose aqueous solution is obtained；2) polyurethane grouting liquid and emulsifier are uniformly mixed and carry out cream with mulser
Change, forms emulsion；3) emulsion of step 2 is added in the ethyl cellulose aqueous solution of step 1) and is quickly stirred, obtained
Room temperature is reduced to mixed liquor and by the temperature of mixed liquor；4) by the mixed liquor of step 3) enter spray dryer carry out heating make table
Face film forming, obtains microencapsulation material；5) microencapsulation material for obtaining step 4) is added in polyurethane waterproof material and delays
Slowly it stirs evenly, obtains the polyurethane water-proof paint of selfreparing.Pass through the cracking of active material in microcapsules in polyurethane coating
Come the fine cracks filled up in building concrete base, self-repair function is completed.
But in above-mentioned technical proposal, due to the bad machine that will affect water-repellent paint of the compatibility of microcapsules and polyurethane
Tool performance, and repair with irreversibility.In addition, microcapsules preparation process may pollute the environment.
Therefore, a kind of reliable, environmental protection polyurethane water-proof paint with self-repair function is developed, antiseepage leakproof will be risen
To positive effect.
Summary of the invention
Goal of the invention of the invention is to provide a kind of selfreparing polyurethane water-proof paint, to solve in water-repellent paint application
Crack, damaging problem；Another object of the present invention is to provide a kind of preparation methods of selfreparing polyurethane water-proof paint；This
Another goal of the invention of invention is to provide a kind of concrete application method of selfreparing polyurethane water-proof paint.
To achieve the above object of the invention, the technical solution adopted by the present invention is that: a kind of selfreparing polyurethane water-proof paint, packet
Include dual-component polyurethane, high water-absorption fiber/epoxy resin covering liquid, cumyl peroxide, dibenzoyl peroxide and oxidation
Zinc is in terms of 100% by the gross mass of dual-component polyurethane, and high water-absorption fiber/epoxy resin covering liquid quality is 1%~2%, mistake
Aoxidize quality≤4% of diisopropylbenzene (DIPB), quality≤3% of dibenzoyl peroxide, quality≤3% of zinc oxide.
To reach above-mentioned another goal of the invention, the technical solution adopted by the present invention is that, a kind of selfreparing polyurethane water-proof painting
The preparation method of material, comprising the following steps:
(1) mixing is stirred at room temperature in the epoxy resin under isopropanol and molten condition, obtains solution A；
(2) high water-absorption fiber is added in solution A, is dispersed with stirring 2~3h at room temperature, obtains high water-absorption fiber/epoxy resin packet
Covering liquid B；
(3) the first component of two component polyurethane and the second component are uniformly mixed by setting ratio, form mixed liquor C；
(4) in whipping process, high water-absorption fiber/epoxy resin covering liquid B is added into mixed liquor C, continues to stir；
(5) continue to add cumyl peroxide, dibenzoyl peroxide, zinc oxide, 20~30min of stirring is uniformly mixed, obtains
To the homogeneous liquid D of selfreparing polyurethane, as required water-repellent paint；
Wherein, by the gross mass of dual-component polyurethane be 100% in terms of, high water-absorption fiber/epoxy resin covering liquid quality be 1%~
2%, quality≤4% of cumyl peroxide, quality≤3% of dibenzoyl peroxide, quality≤3% of zinc oxide.
In above-mentioned technical proposal, the mass ratio of the isopropanol and epoxy resin is (3~4): 1.
In step (2), using it is a small amount of it is multiple by the way of high water-absorption fiber, the high water-absorption fiber are added into the solution
Quality be the 0.3%~0.4% of solution A quality.
Wherein, the high water-absorption fiber is by polyacrylamide, the derivative of polyacrylamide, polyacrylic acid or polyacrylic acid
Derivative be prepared.
In above-mentioned technical proposal, the mass ratio of the first component of the two component polyurethane and the second component be (2.5~
3.5): 1.
Preferred scheme, first component is by polyethers 330N(three-functionality-degree, using glycerol as initiator, propylene oxide, ring
Oxidative ethane is polymerized monomer, ethylene oxide-capped containing primary hydroxyl, molecular weight 4800, hydroxyl value 32.5-35.5), polyethers 2000
(two degrees of functionality, molecular weight 2000, hydroxyl value 54.5-57.5), chlorinated paraffin, toluene di-isocyanate(TDI) (TDI), solvent naphtha are constituted；
Second component by chlorinated paraffin, dispersing agent (quaternary amine, oily amino oleic acid ester), not card (MOCA, 3,3'- bis- chloro- 4,4'-
Diaminodiphenyl-methane or two adjacent chlorodiphenyl amine methane, belong to Diamines chain extender), anti-settling agent (light aromatic hydrocarbons petroleum solvent
64%+ n-butanol 16%), coarse whiting, carbon black, solvent naphtha, composite drier constitute.
The application method of above-mentioned selfreparing polyurethane water-proof paint is, the homogeneous liquid D of selfreparing polyurethane is evenly dispersed,
Spontaneous curing at room temperature obtains selfreparing polyurethane water-proof paint layer.
Its principle is the hydrogen of isocyano in the hydrogen bond and polyurethane formed by the epoxy group open loop in epoxy resin
Key effect and zinc oxide decompose the high reaction activity generated, and activating cumyl peroxide and dibenzoyl peroxide reduces
Valence bond energy, when polyurethane forms breakage, crack, modified polyurethane passes through polyacrylamide and its high-hydroscopicity of copolymer
Promoting to expand, epoxy group, living radical rebuild the chemical bond of covalent bond and transition, hydrogen bond plays catalysis, crosslinked action,
The supramolecular structure of cross-linked network is formed, fracture is repaired.
Preferably, selfreparing polyurethane water-proof paint layer with a thickness of 2~3mm, the room temperature curing time is 24~48 hours.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
1, selfreparing polyurethane water-proof paint prepared by the present invention, has good self-healing properties, anti-puncture, and cracking resistance seam is broken
Damage, energy self-regeneration in the short time, extending life period improve leakage performance.
2, the present invention solidifies cross-linked polyurethane water-repellent paint using crosslinking agent, and harmful substance is fixed, is crosslinked in inside, no
It is easily precipitated, reduces environmental risk.
3, the present invention does not use microcapsules, will not influence the mechanical performance of water-repellent paint, and manufacture craft is simple, scene is applied
Work is easy.
Detailed description of the invention
Fig. 1 is the preparation flow schematic diagram of selfreparing polyurethane water-proof paint in the embodiment of the present invention 1；
Fig. 2 is the scanning electron microscope (SEM) photograph of high water-absorption fiber in embodiment 1；
Fig. 3 is the elemental analysis figure of high water-absorption fiber in embodiment 1；
Fig. 4 is the infrared spectrum of high water-absorption fiber in embodiment 1；
Fig. 5 is the selfreparing front and back standard specimen comparison diagram of selfreparing polyurethane water-proof paint in embodiment 2；
Fig. 6 is the selfreparing front and back comparison diagram of selfreparing polyurethane water-proof paint in embodiment 3；
Fig. 7 is the selfreparing front and back comparison diagram of selfreparing polyurethane water-proof paint in embodiment 4；
Fig. 8 is the selfreparing front and back standard specimen comparison diagram of selfreparing polyurethane water-proof paint in embodiment 4.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
Embodiment 1: the preparation of selfreparing polyurethane coating.
10g isopropanol is added in 100ml container, opens stirring, epoxy resin is heated to molten condition, it is slow with dropper
The slow 40g that is added dropwise is uniformly dispersed into said vesse, obtains solution A.
High water-absorption fiber 0.2g is weighed, is added in solution A, continues to stir 2h at room temperature, obtains covering liquid B.
The first component 20g of dual-component polyurethane is weighed, second component 58g is added in 150ml container, and 0.8g cladding is added
Liquid B opens stirring, weighs cumyl peroxide 2.4g, dibenzoyl peroxide 1.2g, zinc oxide 0.8g, successively slowly adds
Enter, 30min to be mixed is uniformly mixed, and obtains the homogeneous liquid D of selfreparing polyurethane.
2mm thickness mold is lain on oilpaper, homogeneous liquid D is uniformly poured into, levelling, solidification for 24 hours, it is poly- to obtain selfreparing
Urethane dope layer.
Performance detection is as shown in the table:
。
As shown in Fig. 2, high water-absorption fiber is in filiform under scanning electron microscope.
In the present embodiment, the primary raw material of the high water-absorption fiber is polyacrylamide；As shown in figure 3, high water-absorption fiber
Element be made of carbon, hydrogen, oxygen, nitrogen；As shown in figure 4, the characteristic peak of high water-absorption fiber appears in 1665cm-1Place is carbonyl
Characteristic absorption peak corresponds to amide (C=O stretching vibration), 1637cm-1Characteristic peak of the place for carbon carbon (C-C)), 1618cm-1Place
For the characteristic peak of amide (N-H bending vibration), 1460cm-1 Place is the characteristic absorption peak of methylene deformation, 1561cm-1For secondary acyl
Amine N-H bending vibration, 896cm-1For carbon-carbon double bond (C=CH2) characteristic peak, 1165cm-1And 1112cm-1Locate absorption peak and C-N
Stretching vibration is related, illustrates to contain polyacrylamide in high water-absorption fiber.The element composition of high water-absorption fiber is as shown in the table:
The element of 1 high water-absorption fiber of table forms
| Element | C | N | O |
| Mass fraction Wt% | 44.03 | 3.23 | 52.75 |
| Atomicity percentage composition At% | 50.96 | 3.20 | 45.84 |
Beneficial effect to illustrate the invention has carried out comparative experiments, and experiment proportion is as shown in table 2 below,
2 selfreparing polyurethane water-proof paint of table experiment proportion:
。
3 selfreparing polyurethane water-proof paint mechanical performance tensile test result of table
。
Embodiment 2: the preparation of selfreparing polyurethane coating.
10g isopropanol is added in 100ml container, opens stirring, epoxy resin is heated to molten condition, it is slow with dropper
It is slow to be added dropwise under 40g to the container, it is uniformly dispersed, obtains solution A.It weighs and high water-absorption fiber 0.2g is added, continue to stir at room temperature
2h is mixed, covering liquid B is obtained.
First part polyurethane 20g is weighed, second component 60g is added in 150ml container, and 0.8g covering liquid B is added, and is opened
Stirring, weighs cumyl peroxide 2.4g, and zinc oxide 0.8g is successively slowly added to, and 30min to be mixed is uniformly mixed, and obtains
The homogeneous liquid D of selfreparing polyurethane；2mm thickness mold is lain on oilpaper, homogeneous liquid is uniformly poured into, levelling, is solidified for 24 hours,
Obtain selfreparing polyurethane coating.
。
As shown in figure 5, in the case where completely cutting through, selfreparing 48h is 2 selfreparing polyurethane water-proof paint of embodiment
Standard specimen comparison diagram before and after selfreparing；
Sample manufactured in the present embodiment, fracture elongation reach 795%, and selfreparing 48h test, selfreparing tensile strength is original
46% or so, after reparation fracture elongation be 52% or so.
Embodiment 3: the preparation of selfreparing polyurethane coating.
10g isopropanol is added in 100ml container, opens stirring, epoxy resin is heated to molten condition, it is slow with dropper
It is slow to be added dropwise under 40g to the container, it is uniformly dispersed, obtains solution A.High water-absorption fiber 0.2g is weighed, continues to stir 2h at room temperature,
Obtain covering liquid B.First part polyurethane 20g is weighed, second component 60g is added in 150ml container, 0.8g covering liquid B is added,
Stirring is opened, cumyl peroxide 2.4g, dibenzoyl peroxide 1.2g are weighed, zinc oxide 0.8g is successively slowly added to, to
It stirs 30min to be uniformly mixed, obtains the homogeneous liquid D of selfreparing polyurethane；2mm thickness mold is lain on oilpaper, by homogeneous liquid
It uniformly pours into, levelling, solidification for 24 hours, obtains selfreparing polyurethane coating.
。
Sample prepared by the present embodiment 3, fracture elongation reach 611%, and selfreparing 48h is tested, and selfreparing tensile strength is extensive
Multiple to arrive original 63% or so, fracture elongation is 63% or so after reparation.
As shown in fig. 6, in the case where selfreparing waterproof material is completely cut through, the front and back comparison diagram of selfreparing 30min.
Embodiment 4: the preparation of selfreparing polyurethane coating.
10g isopropanol is added in 100ml container, opens stirring, epoxy resin is heated to molten condition, it is slow with dropper
It is slow to be added dropwise under 40g to the container, it is uniformly dispersed, obtains solution A.High water-absorption fiber 0.2g is weighed, continues to stir 2h at room temperature,
Obtain covering liquid B.First part polyurethane 20g is weighed, second component 60g is added in 150ml container, 1.6g covering liquid B is added,
Stirring is opened, cumyl peroxide 2.4g, dibenzoyl peroxide 0.8g are weighed, zinc oxide 0.8g is successively slowly added to, to
It stirs 30min to be uniformly mixed, obtains the homogeneous liquid D of selfreparing polyurethane；2mm thickness mold is lain on oilpaper, by homogeneous liquid
It uniformly pours into, levelling, solidification for 24 hours, obtains selfreparing polyurethane coating.
。
As shown in fig. 7, in the case where selfreparing waterproof material is completely cut through, the front and back comparison diagram of selfreparing 30min.
As shown in figure 8, in the case where completely cutting through, selfreparing 48h is 4 selfreparing polyurethane water-proof paint of embodiment
Standard specimen comparison diagram before and after selfreparing.
Claims (9)
1. a kind of selfreparing polyurethane water-proof paint, including dual-component polyurethane, it is characterised in that: further include high water-absorption fiber/
Epoxy resin covering liquid, cumyl peroxide, dibenzoyl peroxide and zinc oxide are with the gross mass of dual-component polyurethane
100% meter, high water-absorption fiber/epoxy resin covering liquid quality are 1%~2%, quality≤4% of cumyl peroxide, peroxide
Change quality≤3% of dibenzoyl, quality≤3% of zinc oxide.
2. a kind of preparation method of selfreparing polyurethane water-proof paint, it is characterised in that the following steps are included:
(1) mixing is stirred at room temperature in the epoxy resin under isopropanol and molten condition, obtains solution A；
(2) high water-absorption fiber is added in solution A, is dispersed with stirring 2~3h at room temperature, obtains high water-absorption fiber/epoxy resin packet
Covering liquid B；
(3) the first component of two component polyurethane and the second component are uniformly mixed by setting ratio, form mixed liquor C；
(4) in whipping process, high water-absorption fiber/epoxy resin covering liquid B is added into mixed liquor C, continues to stir；
(5) continue to add cumyl peroxide, dibenzoyl peroxide, zinc oxide, 20~30min of stirring is uniformly mixed, obtains
To the homogeneous liquid D of selfreparing polyurethane, as required water-repellent paint；
Wherein, by the gross mass of dual-component polyurethane be 100% in terms of, high water-absorption fiber/epoxy resin covering liquid quality be 1%~
2%, quality≤4% of cumyl peroxide, quality≤3% of dibenzoyl peroxide, quality≤3% of zinc oxide.
3. the preparation method of selfreparing polyurethane water-proof paint according to claim 2, it is characterised in that: the isopropanol
Mass ratio with epoxy resin is (3~4): 1.
4. the preparation method of selfreparing polyurethane water-proof paint according to claim 2, it is characterised in that: in step (2),
Using it is a small amount of it is multiple by the way of high water-absorption fiber is added into the solution, the quality of the high water-absorption fiber is solution A quality
0.3%~0.4%.
5. the preparation method of selfreparing polyurethane water-proof paint according to claim 2 or 4, it is characterised in that: the height
Water-absorption fiber is prepared by the derivative of polyacrylamide, the derivative of polyacrylamide, polyacrylic acid or polyacrylic acid.
6. the preparation method of selfreparing polyurethane water-proof paint according to claim 2, it is characterised in that: the bi-component
First component of polyurethane and the mass ratio of the second component are (2.5~3.5): 1.
7. the preparation method of selfreparing polyurethane water-proof paint according to claim 6, it is characterised in that: described first group
Part is made of polyethers 330N, polyethers 2000, chlorinated paraffin, toluene di-isocyanate(TDI), solvent naphtha；Second component is by chlorination stone
Wax, dispersing agent, Mo Ka, anti-settling agent, coarse whiting, carbon black, solvent naphtha, composite drier are constituted.
8. a kind of application of selfreparing polyurethane water-proof paint, it is characterised in that: will be using any preparation in claim 2 to 7
The homogeneous liquid D of the selfreparing polyurethane that method prepares is evenly dispersed, spontaneous curing at room temperature, and it is anti-to obtain selfreparing polyurethane
Water paint layer.
9. application according to claim 8, it is characterised in that: selfreparing polyurethane water-proof paint layer with a thickness of 2~
3mm, room temperature curing time are 24~48 hours.
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