No-solvent type Polyaspartic Polyurea elastic water proofing paint
Technical field
The present invention relates to waterproof paint, relate to especially that a kind of water resistance is good, mechanical property is excellent, acid and alkali-resistance, salt tolerant is water-fast, ageing-resistant, corrosion-resistant and easy construction, do not need the no-solvent type Polyaspartic Polyurea elastic water proofing paint of special large-scale spraying equipment.
Background technology
Polyaspartic Ester-Based Coatings is in recent years a kind of aliphatics of growing up of polyureas field, long response time, high weather-proof, high performance a kind of coating, is called as third generation polyureas.Compare with traditional polyurethane coating, its matrix resin based on polyaspartic ester is the secondary amino group diamines, and speed of response is faster, be easy to realize thickly be coated with, reduce engineering time and number of times, and excellent performance; It has the characteristics of high-solid lower-viscosity simultaneously, especially is fit to produce solvent-based environmentally friendly coating.Can reduce to harm good environmental protection.
Water-proof material mainly refers to be applied to play in buildings and the structures protection against the tide, leakproof, and protection buildings and structures and member thereof are not subjected to a class material of water logging erosion destruction.The water-proof material that has been applied at present has rigidity water-proofing material (pea gravel concreten), waterproof roll (pitch class coiled material, high-polymer modified pitch coiled material, synthetic macromolecule coiled material) and waterproof paint etc.As more novel water-proof material, waterproof paint has its superior characteristic, has easy construction, easy to operate, good water-proof effect, easily repairs, the easy advantage such as assurance of quality.And at present waterproof paint mainly take polymer cement waterproof paint, polymkeric substance water-proof emulsion, polymer modified asphalt waterproof paint, polyurethane water-proof paint etc. as main, and in actual applications these materials and coating at mechanical property, ageing resistance, the cold-resistant aspect Shortcomings such as hot., temperature tolerance easy to crack such as the concrete water-proof material is poor to structural deformation sensitivity etc.The asphalt base waterproofing material weathering resistance is poor, low temperature flexibility is poor, poor etc. to sensitive, pull resistance.That polymer membranes is then constructed is loaded down with trivial details, expensive, difficult form complete waterproof layer, easily alter water, difficultly repair, general weathering resistance is poor.Polyurethane water-proof paint exists that bad mechanical property, weathering resistance are poor, not environmental protection and need the shortcomings such as coating is thicker.
Polyurea materials is as the combination of a kind of novel material, novel process, new technology, obtains using more and more widely in fields such as anticorrosion, wear-resisting, waterproof, especially in waterproof field polyurea materials excellent performance arranged.Spray Polyurea Elastomer (SPUA) on the market is although shown superior performance as water-proof material now, in use expose some problems, only have several seconds to tens seconds such as the too fast gel time of speed of response, need special large-scale spraying equipment, to small area or irregular surface constructional difficulties, and surface effect is relatively poor; Because speed of response is too fast, so that this polyureas is bad to the wetting property of base material; Sticking power is low; And exothermic heat of reaction is concentrated; Percent thermal shrinkage is large; Internal stress is large; This polyureas tint retention of while and loss of properties on aging, decorate properties is poor; After going wrong, be difficult for the deficiencies such as repairing.
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 is water-fast, ageing-resistant, the corrosion-resistant and no-solvent type Polyaspartic Polyurea elastic water proofing paint that has good workability.
The present invention is achieved through the following technical measures, and a kind of no-solvent type Polyaspartic Polyurea elastic water proofing paint is comprised of A, B two components; Wherein the A component contains polyisocyanates and the 65%-98% end envelope isocyanic ester performed polymer of 2%-35% by percentage to the quality; The B component contains 20%-60% based on polyaspartic ester, 10%-40% aggretion type modification based on polyaspartic ester, 5%-30% filler and a small amount of auxiliary agent by percentage to the quality.
Wherein the A component mixes in proportion polyisocyanates and end envelope isocyanic ester performed polymer before use, and static, froth breaking is stand-by.The A component 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 should not surpass 30%, and need high speed dispersion.Can use after two groups of components are mixed.
As a kind of mode of selecting, described polyisocyanates is the isocyanate-monomer that contains two NCO functional groups or its dimer or its tripolymer of functionality 2.0-2.9.
As a kind of mode of selecting, the described isocyanate-monomer that contains two NCO functional groups is tolylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, dicyclohexyl methane diisocyanate or hexamethylene diisocyanate.
As a kind of mode of selecting, described blocked polyisocyanates performed polymer is monomer or the mixture that polyisocyanates and polyvalent alcohol or polyamine chemical combination form, and the functionality of blocked polyisocyanates performed polymer is 2.0-2.5.
As a kind of mode of selecting, described polyisocyanates is tolylene diisocyanate, isophorone diisocyanate or dicyclohexyl methane diisocyanate.
As a kind of mode of selecting, described polyvalent alcohol is polyoxypropyleneglycol, polytetrahydrofuran diol, tetrahydrofuran (THF)-propylene oxide copolymerization glycol, polycaprolactone glycol or no-solvent type liner polyesterdiols.
Concrete, described based on polyaspartic ester general structure is as follows:
, wherein R is alkyl, X is the carbon-chain structure of straight chain or ring-type.
As a kind of mode of selecting, described aggretion type modification based on polyaspartic ester is polymerized by epoxy compounds, polyisocyanates for two or more identical or different based on polyaspartic esters.
As a kind of mode of selecting, described epoxy compounds is ethylene glycol diglycidylether, neopentylglycol diglycidyl ether, polyoxytrimethylene 400 diglycidylethers or glycidyl allyl ether; Polyisocyanates is arbitrary monomer in tolylene diisocyanate, isophorone diisocyanate, diphenylmethanediisocyanate, dicyclohexyl methane diisocyanate, the hexamethylene diisocyanate or one or more the mixture in the polymer.
Polyaspartic Polyurea water-proof material of the present invention in Spray Polyurea Elastomer (SPUA) physical and mechanical property, can also well solve the deficiency of its existence on satisfying the existing market.The invention has the advantages that; The first, excellent elongation at break, tensile strength; The second, have fabulous weathering resistance and can be used for outside waterproof and have ornamental; The 3rd, construction time limit and performance are adjustable, can be transferred to several hours construction time limits from several minutes as required; Can change as required coating hardness, elasticity etc.; The 4th, easy construction can brushing, roller coating, the construction of gravity flow Peer Mode, does not need special large-scale spraying equipment; The 5th, environmental protection, economy do not contain organic solvent, and is harmless, environmentally friendly.The 6th, compare with other materials, just the present invention only needs less thickness can reach identical purpose, need 2mm thick such as the polyurethane water-proof coating, the present invention only needs that 0.5-0.6mm is thick to be got final product; Last the present invention acid and alkali-resistance, corrosion-resistant, wear-resisting, cold-hot, and the performance of the aspect such as adhering to of base material all be better than other waterproof paints.
Embodiment
The present invention will be further described below in conjunction with embodiment:
Embodiment 1
A kind of no-solvent type Polyaspartic Polyurea elastic water proofing paint is comprised of two groups of components.The A component 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 that mixes rear system is the A component of 9-11%.
The B component of coating was disperseed on high speed dispersor 30 minutes after accurately adding successively according to prescription at least;
Fill a prescription such as following table:
Scattered A component and B component are mixed rear making sheet detection by NC0 equivalent and NH equivalent proportioning respectively, being coated with and stepping on thickness is 0.5-0.6mm, 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/℃ |
≤-35 |
Watertightness/0.4MP 2h |
Waterproof |
Surface drying time/min |
≤ 20 |
Do solid work time/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. |
Salt processing/240h |
Without foaming, crumple line, variable color, obscission. |
Embodiment 2
A kind of no-solvent type Polyaspartic Polyurea elastic water proofing paint is comprised of two groups of components.The A component 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 that mixes rear system is the A component of 9-11%.
Paint B component was disperseed on high speed dispersor 30 minutes after accurately adding successively according to prescription at least;
Prescription is such as following table
Scattered A component and B component are mixed rear making sheet detection by NCO equivalent and NH equivalent proportioning respectively, being coated with and stepping on thickness is 0.5-0.6mm, 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/℃ |
≤-35 |
Watertightness/0.4MP 2h |
Waterproof |
Surface drying time/min |
≤ 30 |
Do solid work time/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. |
Salt processing/240h |
Without foaming, crumple line, variable color, obscission. |
Embodiment 3
A kind of no-solvent type Polyaspartic Polyurea elastic water proofing paint is comprised of two groups of components.The A component 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 methylmethane vulcabond, the NCO content that mixes rear system is 11.0% A component.
Paint B component was disperseed on high speed dispersor 30 minutes after accurately adding successively according to prescription at least;
Fill a prescription such as following table:
Material forms |
Additional proportion (mass percent) |
The based on polyaspartic ester resin |
40.0 |
Polymerization based on polyaspartic ester resin |
30.0 |
Auxiliary agent |
2.0 |
Powder |
25.0 |
Pigment |
3.0 |
Scattered A component and B component are mixed rear making sheet detection by NCO equivalent and NH equivalent proportioning respectively, being coated with and stepping on thickness is 0.5-0.6mm, 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/℃ |
≤-35 |
Watertightness/0.4MP 2h |
Waterproof |
Surface drying time/min |
≤90 |
Do solid work time/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. |
Salt processing/240h |
Without foaming, crumple line, variable color, obscission. |
Waterproof paint of the present invention is comprised of two groups of components.By percentage to the quality, wherein the A component by the polyisocyanates of 2%-35% and 65%-98% end envelope isocyanic ester performed polymer; The B component is comprised of 20%-60% based on polyaspartic ester, 10%-40% polymerization based on polyaspartic ester, 5%-30% filler and auxiliary agent.Its advantage is not only to be better than in the past water-proof material on the performance, and construction technology is easy, need not special spraying equipment, has realized that performance can adjust according to demand, and is solvent-free, environmentally friendly, harmless.
More than be that a kind of no-solvent type Polyaspartic Polyurea of the present invention elastic water proofing paint is set forth; be used for helping to understand the present invention; but embodiments of the present invention are not restricted to the described embodiments; anyly do not deviate from the change done under the principle of the invention, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.