CN104194598B - Agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating and preparation method thereof - Google Patents
Agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating and preparation method thereof Download PDFInfo
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- CN104194598B CN104194598B CN201410389546.0A CN201410389546A CN104194598B CN 104194598 B CN104194598 B CN 104194598B CN 201410389546 A CN201410389546 A CN 201410389546A CN 104194598 B CN104194598 B CN 104194598B
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Abstract
The invention discloses a kind of agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating, including isocyanates 20 70 parts, polyether polyol 50 85 parts, bulky amine compound 4 24 parts, solvent 15 40 parts, filler 10 40 parts, auxiliary agent 25 parts, pigment 13 parts, catalyst 13 parts.The synthesis of the single-component polyurea protective coating that the present invention provides adds bulky amine compound, thus component introduces urea groups, add the polarity of component, add the captivation of material hard section, make material finer and close, improve the oil resistivity of material, resistance to medium, the performance of resistance to microorganism.Meanwhile, the mechanical property of the single-component polyurea of the present invention is significantly larger than conventional mono-component polyurethane.
Description
Technical field
The present invention relates to polyureas technology, particularly relate to a kind of agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protects
Coating and preparation method thereof.
Background technology
The most perfect along with the development of agricultural economy and agricultural irrigation systems, the construction of water-carriage system seems increasingly important.Agriculture
The drainage ditch, the water-supply-pipe that use in industry water-carriage system mostly are concrete material, have easily production, shock resistance, resistance to compression, wear-resisting etc.
Advantage, it lays buried, the half buried mode of general employing, plays very important effect in agricultural water delivery, irrigation.But by
Being alkalescence in concrete, for porous material, containing substantial amounts of capillary micropore in its internal structure, these capillary micropores are gas
Circulation with liquid provides passage.When concrete substrate contacts with the medium of surrounding, the corrosivity such as acid in medium, alkali, salt
Material, enters inside concrete by micropore, causes corrosion.This phenomenon is the most universal.Concrete substrate is corroded
After, its structure, mechanical performance all will be affected, and shorten the service life of concrete drainage ditch, aqueduct, serious
It is likely to result in leakage, caves in.
The common corrosion of concrete has physical erosion and chemical attack.Physical erosion: soil media is by easily soluble component in concrete such as
Calcium hydroxide is dissolved out, and the pH value of concrete reduces, and porosity increases, and intensity reduces, and makes corrosive medium be easier to enter
Inside concrete, this erosion is repeated, and causes xoncrete structure to go to pot.Meanwhile, some salt in concrete along with
The intrusion of water, outflow, constantly repeat dissolving, crystallization process, and concrete hole wall is caused knot greatly by the growth repeatedly of crystallization
Brilliant pressure, introduces concrete expansion and splits, and it is exactly a distinct example that the freeze-thaw cycle of concrete destroys.Chemical erosion includes
The corrosion of the materials such as the carbonization of carbon dioxide, the erosion of chloride ion and acid-alkali salt.Carbon dioxide in air or water is with mixed
Calcium hydroxide in solidifying soil, hydrated calcium silicate reaction, play carbonization, causes the alkalescence reduction of concrete, differentiating phenomenon occurs.
Chloride ion in surrounding medium reacts with the calcium hydroxide in concrete etc., generates calcium chloride soluble in water and with mass crystallization
Water, than reactant volume big several-fold solid-phase compound, cause concrete expansion to destroy.The erosion of the media such as acid-alkali salt all can
Cause the destruction of xoncrete structure.Concrete substrate waterproof, protect extremely important.
Concrete drainage ditch, aqueduct interface are most important structure divisions in whole pipeline, due to structure, construct and use
Complexity, be to suffer to corrode the most serious position in concrete pipelines.Carry out waterproof, the anticorrosion of joint just to seem lattice
The most important.
Polyurea materials is the ep-type material that a kind of curing molding grown up in recent years is fast, be easy to construction.It is with hot strength
The Optimalities such as high, pliability is good and waterproof, anticorrosion, wear-resisting, anti-slippery, heat shock resistance, low temperature resistant and good decorative property
Can, more and more favored by people, show unique characteristics in terms of ready coating in terms of the large area such as corrosion-inhibiting coating and wear-resistant coating.
Polyurea materials has physical property, antiseptic property and the workability of excellence concurrently, is the preferred material in waterproof, antiseptic project.Mesh
Front spray polyurea coating is applied increasingly extensive in the protection of concrete substrate.
Spray Polyurea Elastomer Technology with isocyanate ester compound as component A, aminated compounds for B component without catalyst
In the case of through polyureas spraying equipment (polyureas flush coater) fast spraying reaction generate elastomeric material.Spray Polyurea Elastomer Technology
Having used impingement mix principle, component A and B component liquid that reactivity is high mutually clash into, through gun body under high drive
Turbulent closure scheme in mixing chamber, by being atomized after spray gun, is sprayed on basal plane within extremely short working life, forms overall, tough bullet
Gonosome coating.
Spray Polyurea Elastomer Technology is short because of the gel time of component A and B component, it is necessary to use expensive spraying equipment to spray
It is coated with construction.This polyureas flush coater expensive (20-30 ten thousand), structure are complicated, mainly include for accommodate component A carry material pump,
For accommodating the agitator of B component and carrying material pump, main frame, heating grog pipe and spray gun, described in carry material pump and agitator leads to respectively
Crossing pipeline to be connected with main frame, described main frame is connected with spray gun by heating grog pipe.Spray Polyurea Elastomer Technology to little area or
Cost intensive during little engineering construction, is unfavorable for promoting, and engineering construction is limited, hinders the development of polyurea materials.And spray poly-
Tens of seconds that urea spraying post Newton is short, short, curing rate is fast, executing of node, turning, duct sealing etc.
In man-hour, the phenomenons such as coating thickness is uneven, drain spray easily occur, be unfavorable in narrow, complex environment, operating mode construction, resistance
Hinder the development and application of polyurea materials.The most existing spray Polyurea Elastomer Technology, equipment price is expensive, and construction cost is high on a small scale
High.And such material curing rate is fast, loaded down with trivial details in complicated interface construction, have a strong impact on construction quality.Agricultural irrigation water delivery
How laying of pipeline is carried out in wide field, and oil starvation, short of electricity seriously constrain the use of flush coater.And the equipment valency of costliness
Lattice, the complexity of environment and the difficulty of construction, have impact on spray polyurea development in agricultural.
In order to solve the problems referred to above, need a kind of easy construction badly, without accurate proportioning, the single-component polyurea of excellent in mechanical performance,
Can be met concrete protection by modes such as simple brushing, blade coatings.
Summary of the invention
It is an object of the invention to, run in agricultural irrigation concrete water transfer system for above-mentioned existing two-component spraying polyureas
Problem, propose that a kind of concrete drainage ditch, water-supply-pipe one pack system be waterproof, protection carbamide paint.This single-component polyurea coating
Gel time length, easy to use, can manual brushing, blade coating, it is simple to construction, and the aspect such as mechanical performance, adhesive force and spraying
Polyureas reaches unanimity.
For reaching above-mentioned purpose, the application adopts the following technical scheme that
A kind of agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating, including following each group of weight proportion
Point: isocyanates 20-70 part, preferably 33-45 part；Polyether polyol 50-85 part, preferably 60-80 part；Bulky amine compound
4-24 part, preferably 5-15 part；Solvent 15-40 part, preferably 25-35 part, filler 10-40 part, preferably 15-35 part；Auxiliary agent
2-5 part, preferably 3-4 part；Pigment 1-3 part, preferably 1-2 part；Catalyst 1-3 part, preferably 1-2 part.Wherein, described different
Cyanate is aliphatic isocyanates and aromatic isocyanate.
Further, heretofore described aromatic isocyanate is toluene di-isocyanate(TDI) (TDI), diphenyl methane two isocyanide
One or more in acid esters (MDI) and PPDI.
Further, aliphatic isocyanates of the present invention is isophorone diisocyanate (IPDI), 4,4 ' dicyclohexyls
One or more in methane diisocyanate (HMDI), hexamethylene diisocyanate (HDI) and trimer thereof.
Further, heretofore described polyether polyol is polypropylene oxide ethoxylated polyhydric alcohol and/or polytetrahydrofuran polyol.Institute
Stating the further preferred molecular weight of polyether polyol and be respectively the polypropylene oxide ether glycol of 1000,2000,3000, molecular weight is respectively
Being the polypropylene oxide ether trihydroxylic alcohol of 1000,2000,3000, molecular weight is respectively the PolyTHF of 650,1000,2000
One or more in glycol.
Further, described bulky amine compound is Desmophen NH1420, Desmophen NH1520, Desmophen
NH1220, Unilink4200, Unilink4100, Clearlink1000, Clearlink3000, Jefflink555 and Jefflink754
In one or more.
Further, one during heretofore described solvent is ethyl acetate, butyl acetate, acetone, toluene, dimethylbenzene or
Multiple, solvent of the present invention need to process dehydration with molecular sieve.It is further preferred that described solvent is butyl acetate, dimethylbenzene.
Further, during heretofore described filler is fine particle calcium carbonate, triple superphosphate, Pulvis Talci, calcium hydroxide, zinc phosphate and mica powder
One or more, described filler mesh number is more than 800 mesh.
Further, heretofore described auxiliary agent includes antioxidant, light stabilizer and defoamer.Further, described antioxygen
Agent is one or more in antioxidant-264, antioxidant 1010 and antioxidant 1076；Described light stabilizer is UV-9, UV-24,
In UV-49, UV-531 and UV-328 one or more；Defoamer is in BYK-066N, BYK-054 and BYK-5500
One or more.Wherein, described auxiliary agent includes each component that weight proportion is following: antioxidant 0.5-2 part, preferably 1-2 part；
Light stabilizer 0.5-2 part, preferably 1-2 part；Defoamer 0.5-2 part, preferably 1-2 part.
Further, the one or many in the preferred titanium dioxide of heretofore described pigment, iron oxide red, molybdate red, indigo-blue indigo plant and white carbon black
Kind.
Further, heretofore described catalyst is dibutyl tin laurate, dibutyltin diacetate, stannous octoate, different
One or more in lead octoate, phenylmercuric acetate.
Another object of the present invention is to provide above-mentioned agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating
Preparation method, specifically include following steps:
Polyether polyol, bulky amine compound, filler, pigment are added in container, unlatching stirring (stirring is allowed to be heated evenly,
Be conducive to the removing of moisture；And the most each component mix homogeneously), it being heated to 110-120 DEG C, vacuum dehydration is removed in raw material
Water reaches less than 3/10000ths to moisture content, is cooled to temperature of liquid 20-30 DEG C, preferably 25 DEG C.By solvent, aliphatic isocyanide
Acid esters joins in container, after stirring at normal temperature is reacted 0.5-1 hour, adds aromatic isocyanate, catalyst, slowly heats up
To 70-80 DEG C, react 0.5-1 hour, after detection NCO% value reaches design load 98-102%, be cooled to 30 DEG C.Addition helps
Agent etc., stir 0.5 hour, and discharging seals.
Vacuum described in the inventive method uses vacuum pump to realize, and vacuum is-0.1～-0.08MPa；Described slow intensification is 0.5-1
In hour, risen to 70-80 DEG C by 50 DEG C.Owing to along with the rising of temperature, reaction aggravation, implode easily occurring, therefore need to slowly rise
Temperature, makes response speed little by little accelerate.Reaction terminates to be as the criterion with detection NCO, and NCO% value is similar to design load.This
Bright described NCO% design load is to calculate theoretical NCO value by formula.
The single-component polyurea protective coating that the present invention provides uses moisture-curing mode film-forming, i.e. single-component polyurea protection to be coated with
NCO group in material and the steam in air react generation amino-compound, and amino-compound is anti-with remaining NCO group again
Answer film-forming.Coating thickness, no more than 0.8mm, is otherwise easily generated bubble, affects physical property.
Compared to prior art, the agricultural irrigation concrete drainage ditch of present invention offer, water-supply-pipe single-component polyurea protective coating
And preparation method thereof have the advantage that
(1) present invention is single-component system, under air-proof condition, does not has steam in system, and stable system preserves.Kaifeng uses
Time, the NCO group in coating is reacted with the steam in air, generates amino-compound, and amino-compound remains with coating again
NCO group reaction, film-forming.The one-component polyurea protection coating gel time that the present invention provides is long, and surface drying time is
6-8 hour, and then extend operable time, application property is strong.The longer operating time can make form of construction work simple and convenient, can be real
Now manual blade coating, brushing.Can construct in narrow, complicated operating mode, especially construct at node, flex point or coating disappearance.
Single-component polyurea protective coating of the present invention construction is simple, effect is obvious, it is not necessary to accurate measurement as bi-component.For concrete
Waterproof, the protection of material can reduce use cost, improve the work efficiency of complex working condition.
(2) single-component polyurea protective coating of the present invention is with aliphatic isocyanates and aromatic isocyanate as primary raw material, is closing
Add bulky amine compound during one-tenth, thus introduce urea groups, add the polarity of coating, thus it is hard to add coating
Section captivation, make material finer and close, improve the oil resistivity of material, resistance to medium, the performance of resistance to microorganism.Meanwhile,
The mechanical property of the single-component polyurea of the present invention is significantly larger than conventional mono-component polyurethane.
(3) present invention introduces urea groups in the product, also add the mechanics effect of coating, improves the adhesive force with base material.
In the case of without primary coat, the adhesive force >=2MPa on concrete substrate, adhesive force is superior.
Instantiation mode
Embodiment 1
Present embodiment discloses a kind of agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating, including weight
Each component that proportioning is following:
This single-component polyurea protective coating is prepared from by following steps:
By above-mentioned weight proportion by polypropylene oxide ethoxylated polyhydric alcohol PPG-1000, Desmophen NH1420,800 mesh Pulvis Talci
Join in container with white carbon black, after liquid material stirring at low speed 5 minutes, be heated to 110～120 DEG C, open vacuum pump, vacuum
For-0.1～-0.08MPa, vacuum dehydration 2h, remove a small amount of water contained in raw material, detection moisture content reaches less than 3/10000ths,
Being cooled to liquid material temperature is about 25 DEG C；Again butyl acetate, HMDI are joined in container, be warming up to 50 DEG C, stirring reaction
1 hour, after question response heat release terminates, add methyl diphenylene diisocyanate, stannous octoate, be to slowly warm up to 70～80 DEG C,
Keep reaction 2h, sampling, after detection NCO% value is qualified, be cooled to 30 DEG C, add defoamer BYK-066N, antioxidant-264
With light stabilizer UV-9, after stirring 0.5 hour, discharging, seal.
To the single-component polyurea protective coating of above-mentioned preparation at 25 DEG C, under humidity 65% environment, by the experiment side of architectural waterproof material
Method GB/T16777-2008 carries out Mechanics Performance Testing, and testing result is as shown in table 1.
The mechanical experimental results of table 1 embodiment 1
From table 1, single-component polyurea protective coating prepared by the present embodiment has excellent oil resistivity and resistant to liquid dielectric behavior,
Mechanical property is good, has longer gel time 4 hours, can realize manual blade coating, brush.In use can be effective
Bear washing away of water and contained solidfied material thereof, concrete drainage ditch, water-supply-pipe are had good protection effect.
Embodiment 2
Present embodiment discloses a kind of agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating, including weight
Each component that proportioning is following:
By above-mentioned weight proportion by polypropylene oxide ethoxylated polyhydric alcohol PPG-2000, Desmophen NH1420,800 mesh Pulvis Talci
Join in container with white carbon black, after liquid material stirring at low speed 5 minutes, be heated to 110～120 DEG C, open vacuum pump, vacuum
For-0.1～-0.08MPa, vacuum dehydration 2h, remove a small amount of water contained in raw material, detection moisture content reaches less than 3/10000ths,
Being cooled to liquid material temperature is about 25 DEG C.Again butyl acetate, hexamethylene diisocyanate trimer are joined in container, rise
Temperature is to 50 DEG C, and stirring is reacted 1 hour, after question response heat release terminates, adds MDI, dibutyl tin laurate, slowly heats up
To 70～80 DEG C, keep reaction 2h, sampling, after detection NCO% value is qualified, be cooled to 30 DEG C；It is eventually adding defoamer
BYK-066N, antioxidant-264, light stabilizer UV-49, after stirring 0.5 hour, discharging, seal.
To the single-component polyurea of above-mentioned preparation at 25 DEG C, under humidity 65% environment, by the experimental technique GB/T of architectural waterproof material
16777-2008 carries out Mechanics Performance Testing, and testing result is as shown in table 2.
The mechanical experimental results of table 2 embodiment 2
From table 2, single-component polyurea protective coating prepared by the present embodiment has excellent oil resistivity and resistant to liquid dielectric behavior,
Mechanical property is good, has longer gel time 4 hours, can realize manual blade coating, brush.In use can be effective
Bear washing away of water and contained solidfied material thereof, concrete drainage ditch, water-supply-pipe are had good protection effect.
Claims (10)
1. agricultural irrigation concrete drainage ditch, a water-supply-pipe single-component polyurea protective coating, including following each of weight proportion
Component:
Wherein, described isocyanates is aliphatic isocyanates and aromatic isocyanate.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described aromatic isocyanate be toluene di-isocyanate(TDI), methyl diphenylene diisocyanate one or more.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described aliphatic isocyanates is isophorone diisocyanate, 4,4 '-dicyclohexyl methyl hydride diisocyanate, six Asias
One or more in methyl diisocyanate and trimer, cyclohexanedimethyleterephthalate diisocyanate.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described polyether polyol is polypropylene oxide ethoxylated polyhydric alcohol and/or polytetrahydrofuran polyol.
Single-component polyurea protective coating the most according to claim 1, it is characterised in that: described bulky amine compound is
Desmophen NH 1420、Desmophen NH 1520、Desmophen NH 1220、Unilink 4200、Unilink 4100、
One or more in Clearlink 1000, Clearlink 3000, Jefflink555 and Jefflink754.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described filler is one or more in fine particle calcium carbonate, triple superphosphate, Pulvis Talci, calcium hydroxide, zinc phosphate and mica powder, institute
Stating filler mesh number is more than 800 mesh.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described auxiliary agent includes antioxidant, light stabilizer and defoamer.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described catalyst is dibutyl tin laurate, dibutyltin diacetate, stannous octoate, isooctyl acid lead, acetic acid benzene
One or more in hydrargyrum.
Agricultural irrigation concrete drainage ditch the most according to claim 1, water-supply-pipe single-component polyurea protective coating, it is special
Levy and be: described solvent is one or more in ethyl acetate, butyl acetate, acetone, toluene, dimethylbenzene.
10. agricultural irrigation concrete drainage ditch described in claim 1, the water-supply-pipe preparation side of single-component polyurea protective coating
Method, it is characterised in that comprise the following steps:
Polyether polyol, bulky amine compound, filler, pigment are added in container, open stirring, be heated to 110-120 DEG C,
Vacuum dehydration removes the water in raw material to moisture content less than 3/10000ths, is cooled to 20-30 DEG C；By solvent, aliphatic isocyanates
Join in container, after stirring at normal temperature is reacted 0.5-1 hour, add aromatic isocyanate, catalyst, be warming up to 70-80
DEG C, react 0.5-1 hour, after detection NCO% value reaches design load 98-102%, be cooled to 30 DEG C；It is eventually adding auxiliary agent,
Stirring 0.5 hour, discharging seals.
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| CN201410389546.0A CN104194598B (en) | 2014-08-08 | 2014-08-08 | Agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating and preparation method thereof |
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| CN201410389546.0A CN104194598B (en) | 2014-08-08 | 2014-08-08 | Agricultural irrigation concrete drainage ditch, water-supply-pipe single-component polyurea protective coating and preparation method thereof |
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| CN110344371A (en) * | 2019-07-24 | 2019-10-18 | 黄河勘测规划设计研究院有限公司 | For the spray polyurea coating anti-seepage processing method of reverse water pressure |
| CN111849322A (en) * | 2020-07-29 | 2020-10-30 | 深圳市奇信集团股份有限公司 | Toilet waterproof coating and construction method |
| CN112552477B (en) * | 2020-12-09 | 2023-04-14 | 黎明化工研究设计院有限责任公司 | Single-component self-curing high-strength polyurethane elastomer and preparation method thereof |
| CN116004101A (en) * | 2023-02-23 | 2023-04-25 | 青岛聚合四维科技有限公司 | Weather-resistant single-component polyurea protective coating and preparation method thereof |
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| EP0573860A1 (en) * | 1992-06-10 | 1993-12-15 | Bayer Corporation | Polyurea coating compositions having improved pot lives |
| CN102675583A (en) * | 2011-03-08 | 2012-09-19 | 北京市大禹王防水工程集团有限公司 | Bi-component slow-reaction polyurea and preparation method thereof |
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