CN103031045B - Solvent-free polyaspartic acid ester polyurea elastic waterproof paint - Google Patents
Solvent-free polyaspartic acid ester polyurea elastic waterproof paint Download PDFInfo
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- CN103031045B CN103031045B CN201110305744.0A CN201110305744A CN103031045B CN 103031045 B CN103031045 B CN 103031045B CN 201110305744 A CN201110305744 A CN 201110305744A CN 103031045 B CN103031045 B CN 103031045B
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Abstract
The present invention relates to coating and manufacture method thereof, disclose a kind of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint, by A, B two component form; Wherein component A by percentage to the quality, the polyisocyanates containing 2%-35% and 65%-98% end envelope Isocyanate prepolymers body; B component by percentage to the quality, containing 20%-60% polyaspartic ester, 10%-40% aggretion type modification polyaspartic ester, 5%-30% filler and a small amount of auxiliary agent.The present invention is that the carbamide paint of Raw material processing has easy construction than the carbamide paint using polyaspartic ester to process, do not need the advantage that special large-scale spraying equipment, gel time extend, surface drying time shortens, tensile strength strengthens, elongation at break increases the increase of elasticity hardness of film, and solvent-free, environmentally friendly and harmless.
Description
Technical field
The present invention relates to waterproof paint, especially relate to that a kind of water resistance is good, mechanical property is excellent, acid and alkali-resistance, salt tolerant are water-fast, ageing-resistant, corrosion-resistant and easy construction, do not need the Solvent-free polyaspartic acid ester polyurea elastic waterproof paint of special large-scale spraying equipment.
Background technology
Polyaspartic Ester-Based Coatings is a kind of aliphatics, long response time, high durable, the high performance a kind of coating that grow up of polyureas field in recent years, is called as third generation polyureas.Compared with traditional polyurethane coating, its matrix resin polyaspartic ester is secondary amino group diamines, and speed of response is faster, is easy to realize thick painting, reduce engineering time and number of times, and excellent performance; It has the feature of high-solid lower-viscosity simultaneously, is especially applicable to producing solvent-based environmentally friendly coating.Can reduce harm, good environmental protection.
Water-proof material mainly refers to be applied in buildings and structures and plays protection against the tide, leakproof, and architecture protection thing and structures and component thereof are by a class material of water logging erosion destruction.The water-proof material be applied at present has rigidity water-proofing material (pea gravel concreten), waterproof roll (pitch class coiled material, high-polymer modified pitch coiled material, synthesis polymer coiled material) and waterproof paint etc.As more novel water-proof material, the characteristic that waterproof paint has it superior, has the advantages such as easy construction, easy to operate, good water-proof effect, easily repairing, quality easily ensure.And at present waterproof paint mainly based on polymer cement waterproof paint, polymkeric substance water-proof emulsion, polymer modified asphalt waterproof paint, polyurethane water-proof paint etc., and in actual applications these materials and coating mechanical property, ageing resistance, cold-resistant hot etc. in Shortcomings.As easy to crack in concrete water-proof material, temperature tolerance difference is responsive etc. to structural deformation.Asphalt base waterproofing material weathering resistance is poor, low temperature flexibility is poor, to sensitive, pull resistance difference etc.Polymer membranes is then constructed and loaded down with trivial details, expensive, is difficultly formed complete waterproof layer, easily channeling water, difficultly repair, general weathering resistance is poor.It is poor, not environmentally and need the shortcomings such as coating is thicker to there is bad mechanical property, weathering resistance in polyurethane water-proof paint.
Polyurea materials, as the combination of a kind of novel material, novel process, new technology, obtains applying more and more widely in fields such as anticorrosion, wear-resisting, waterproof, especially has excellent performance in waterproof field polyurea materials.Now Spray Polyurea Elastomer (SPUA) is commercially although shown superior performance as water-proof material, in use expose some problems, gel time as too fast in speed of response only has several seconds to tens seconds, need special large-scale spraying equipment, to small area or irregular surface constructional difficulties, and surface effect is poor; Because speed of response is too fast, make the wetting property of this polyureas to base material bad; Sticking power is low; And exothermic heat of reaction is concentrated; Percent thermal shrinkage is large; Internal stress is large; This polyureas tint retention and loss of properties on aging simultaneously, decorate properties is poor; The not easily deficiency such as repairing after going wrong.
Summary of the invention
In order to overcome shortcoming of the prior art, the object of the invention is to provide that a kind of water resistance is good, mechanical property is excellent, acid and alkali-resistance, salt tolerant are water-fast, ageing-resistant, the corrosion-resistant and Solvent-free polyaspartic acid ester polyurea elastic waterproof paint that has good workability.
The present invention is achieved through the following technical measures, a kind of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint, by A, B two component form; Wherein component A by percentage to the quality, the polyisocyanates containing 2%-35% and 65%-98% end envelope Isocyanate prepolymers body; B component by percentage to the quality, containing 20%-60% polyaspartic ester, 10%-40% aggretion type modification polyaspartic ester, 5%-30% filler and a small amount of auxiliary agent.
Wherein polyisocyanates and end envelope Isocyanate prepolymers body mix in proportion by component A before use, and static, froth breaking is stand-by.Component A can add the powders such as talcum powder, barium sulfate, calcium carbonate, glass powder, flatting silica as required, can add the pigment such as titanium white, carbon black, the blue or green orchid of phthalein simultaneously, and need to add the auxiliary agents such as defoamer, flow agent, dispersion agent, anti-anti-settling agent.Add above-mentioned material total amount and more than 30%, and high speed dispersion should do not needed.Can use after two groups of components are mixed.
Select mode as one, described polyisocyanates be functionality 2.0-2.9 containing the isocyanate-monomer of Liang Ge NCO functional group or its dimer or its tripolymer.
Select mode as one, the described isocyanate-monomer containing Liang Ge NCO functional group is tolylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, dicyclohexyl methane diisocyanate or hexamethylene diisocyanate.
Select mode as one, described blocked polyisocyanates performed polymer is monomer or the mixture of polyisocyanates and polyvalent alcohol or polyamine chemical combination, and the functionality of blocked polyisocyanates performed polymer is 2.0-2.5.
Select mode as one, described polyisocyanates is tolylene diisocyanate, isophorone diisocyanate or dicyclohexyl methane diisocyanate.
Select mode as one, described polyvalent alcohol is polyoxypropyleneglycol, polytetrahydrofuran diol, tetrahydrofuran (THF)-propylene oxide copolymer glycols, polycaprolactone glycol or no-solvent type liner polyesterdiols.
Concrete, described polyaspartic ester general structure is as follows:
, wherein R is alkyl, and X is the carbon-chain structure of straight chain or ring-type.
Select mode as one, described aggretion type modification polyaspartic ester is that two or more identical or different polyaspartic esters are polymerized by epoxy compounds, polyisocyanates.
Select mode as one, described epoxy compounds is ethylene glycol diglycidylether, neopentylglycol diglycidyl ether, polyoxytrimethylene 400 diglycidylether or glycidyl allyl ether; Polyisocyanates is the arbitrary monomer in tolylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate or one or more the mixture in polymer.
Polyaspartic Polyurea water-proof material of the present invention, while meeting Spray Polyurea Elastomer on existing market (SPUA) physical and mechanical property, also can solve the deficiency that it exists.The invention has the advantages that; The first, excellent elongation at break, tensile strength; The second, there is fabulous weathering resistance and can be used for outside waterproof and have ornamental; 3rd, construction the time limit and performance adjustable, as required can from several minutes be transferred to several hours construction the time limit; Coating hardness, elasticity etc. can be changed as required; 4th, easy construction, can brush, roller coating, gravity flow Peer Mode construction, do not need special large-scale spraying equipment; 5th, environmental protection, economy, not containing organic solvent, harmless, environmentally friendly.6th, compared with other materials, the present invention only needs less thickness just can reach identical object, and as polyurethane water-proof coating needs 2mm thick, the present invention only needs 0.5-0.6mm thick; Last the present invention is at acid and alkali-resistance, corrosion-resistant, wear-resisting, cold-hot, be better than other waterproof paints with the performance in the attachment of base material etc.
Embodiment
Below in conjunction with embodiment, the present invention will be further described:
Embodiment 1
A kind of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint, is made up of two groups of components.Component A is the prepolymer that 1000 polyoxypropyleneglycols prepare content 6.2%NCO by 34.8 parts of tolylene diisocyanates (TDI) and 100 parts of molecular weight, add 15 parts of diphenylmethanediisocyanates (MDI), the NCO content mixing rear system is the component A of 9-11%.
The B component of coating at least disperses 30 minutes after accurately adding successively according to formula on high speed dispersor;
Formula is as following table:
Scattered component A and B component are mixed rear making sheet by NC0 equivalent and NH equivalent proportioning respectively detect, it is 0.5-0.6mm that thickness is stepped in painting, examination criteria GB/T23446-2009 (spray polyurea water-proof material) and GB/T19250 (polyurethane water-proof paint), detected result is as follows;
| Test item | Detected result |
| Solids content/% | ≥96 |
| Tensile strength/MPa | ≥10 |
| Tension set/% | ≥300 |
| Low-temperature bending/DEG C | ≤-35 |
| Watertightness/0.4MP 2h | Waterproof |
| surface drying time/min | ≤ 20 |
| the time of doing solid work/h | ≤ 12 |
| tear strength/N/mm | >=40 |
| cohesive strength/MP | >=3.0 |
| acid treatment 240h | without foaming, crumple line, variable color, obscission. |
| alkaline purification/240h | without foaming, crumple line, variable color, obscission. |
| ficus caricaL/240h | without foaming, crumple line, variable color, obscission. |
Embodiment 2
A kind of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint, is made up of two groups of components.Component A is the prepolymer that 1000 polyoxypropyleneglycols prepare NCO content 6.2% by 34.8 parts of tolylene diisocyanates (TDI) and 100 parts of molecular weight, add HDI tripolymer and 7.5 parts of diphenylmethanediisocyanates (MDI) of 7.5 parts of NCO content 21%, the NCO content mixing rear system is the component A of 9-11%.
Paint B component at least disperses 30 minutes after accurately adding successively according to formula on high speed dispersor;
Formula is as following table
Scattered component A and B component are mixed rear making sheet by NCO equivalent and NH equivalent proportioning respectively detect, it is 0.5-0.6mm that thickness is stepped in painting, examination criteria GB/T23446-2009 (spray polyurea water-proof material) and GB/T19250 (polyurethane water-proof paint), detected result is as follows;
| test item | detected result |
| solids content/% | >=96 |
| tensile strength/MPa | >=15 |
| tension set/% | >=300 |
| low-temperature bending/DEG C | ≤-35 |
| watertightness/0.4MP 2h | waterproof |
| surface drying time/min | ≤ 30 |
| the time of doing solid work/h | ≤ 12 |
| tear strength/N/mm | >=40 |
| cohesive strength/MP | >=3.0 |
| acid treatment 240h | without foaming, crumple line, variable color, obscission. |
| alkaline purification/240h | without foaming, crumple line, variable color, obscission. |
| ficus caricaL/240h | without foaming, crumple line, variable color, obscission. |
Embodiment 3
A kind of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint, is made up of two groups of components.Component A is the prepolymer that 1000 polyoxypropyleneglycols prepare NCO content 5.8% by 44.4 parts of isophorone diisocyanates (IPDI) and 100 parts of molecular weight, add 36 parts of dicyclohexyl dicyclohexylmethane diisocyanate, the NCO content mixing rear system is the component A of 11.0%.
Paint B component at least disperses 30 minutes after accurately adding successively according to formula on high speed dispersor;
Formula is as following table:
| Material forms | Additional proportion (mass percent) |
| Polyaspartic ester resin | 40.0 |
| Polymerization polyaspartic ester resin | 30.0 |
| Auxiliary agent | 2.0 |
| Powder | 25.0 |
| Pigment | 3.0 |
Scattered component A and B component are mixed rear making sheet by NCO equivalent and NH equivalent proportioning respectively detect, it is 0.5-0.6mm that thickness is stepped in painting, examination criteria GB/T23446-2009 (spray polyurea water-proof material) and GB/T19250 (polyurethane water-proof paint), detected result is as follows;
| Test item | Detected result |
| Solids content/% | ≥96 |
| Tensile strength/MPa | ≥17 |
| Tension set/% | ≥300 |
| Low-temperature bending/DEG C | ≤-35 |
| Watertightness/0.4MP 2h | Waterproof |
| Surface drying time/min | ≤90 |
| The time of doing solid work/h | ≤24 |
| tear strength/N/mm | >=40 |
| cohesive strength/MP | >=3.0 |
| acid treatment 240h | without foaming, crumple line, variable color, obscission. |
| alkaline purification/240h | without foaming, crumple line, variable color, obscission. |
| ficus caricaL/240h | without foaming, crumple line, variable color, obscission. |
Waterproof paint of the present invention, is made up of two groups of components.By percentage to the quality, wherein component A holds envelope Isocyanate prepolymers body by the polyisocyanates of 2%-35% and 65%-98%; B component is polymerized polyaspartic ester, 5%-30% filler and auxiliary agent is formed by 20%-60% polyaspartic ester, 10%-40%.Its advantage is not only performance to be better than water-proof material in the past, and construction technology is easy, and without the need to special spraying equipment, achieving performance can adjust according to demand, solvent-free, environmentally friendly, harmless.
More than that a kind of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint of the present invention is set forth; the present invention is understood for helping; but embodiments of the present invention are not restricted to the described embodiments; any do not deviate from the principle of the invention under do change, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. a preparation method for Solvent-free polyaspartic acid ester polyurea elastic waterproof paint, is characterized in that, comprises the following steps:
S1: by percentage to the quality, it is the component A of 9-11% that the polyisocyanates of 2%-35% and 65%-98% blocked isocyanate performed polymer are mixed rear obtained NCO content;
S2: by percentage to the quality, obtains B component by 20%-60% polyaspartic ester, 10%-40% aggretion type modification polyaspartic ester, 5%-30% filler and a small amount of auxiliary agent high speed dispersion;
S3: scattered component A and B component are pressed respectively NC0 equivalent and the mixing of NH equivalent proportioning.
2. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 1, is characterized in that: described polyisocyanates be functionality 2.0-2.9 containing the isocyanate-monomer of Liang Ge NCO functional group or its dimer or its tripolymer.
3. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 2, is characterized in that: the described isocyanate-monomer containing Liang Ge NCO functional group is tolylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, dicyclohexyl methane diisocyanate or hexamethylene diisocyanate.
4. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 1, it is characterized in that: described blocked polyisocyanates performed polymer is monomer or the mixture of polyisocyanates and polyvalent alcohol or polyamine chemical combination, the functionality of blocked polyisocyanates performed polymer is 2.0-2.5.
5. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 4, is characterized in that: described polyisocyanates is tolylene diisocyanate, isophorone diisocyanate or dicyclohexyl methane diisocyanate.
6. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 4, is characterized in that: described polyvalent alcohol is polyoxypropyleneglycol, polytetrahydrofuran diol, tetrahydrofuran (THF)-propylene oxide copolymer glycols, polycaprolactone glycol or no-solvent type liner polyesterdiols.
7. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 1, it is characterized in that, described polyaspartic ester general structure is as follows:
, wherein R is alkyl, and X is the carbon-chain structure of straight chain or ring-type.
8. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 1, is characterized in that: described aggretion type modification polyaspartic ester is that two or more identical or different polyaspartic esters are polymerized by epoxy compounds, polyisocyanates.
9. the preparation method of Solvent-free polyaspartic acid ester polyurea elastic waterproof paint according to claim 8, is characterized in that: described epoxy compounds is ethylene glycol diglycidylether, neopentylglycol diglycidyl ether, polyoxytrimethylene 400 diglycidylether or glycidyl allyl ether; Polyisocyanates is the arbitrary monomer in tolylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate or one or more the mixture in polymer.
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