CN107629672A - A kind of waterproof polyurethane coating and preparation method thereof - Google Patents
A kind of waterproof polyurethane coating and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to coating processing technique field, specifically a kind of waterproof polyurethane coating and preparation method thereof.Each constituent of waterproof polyurethane coating and its weight part ratio are：30 ~ 50 parts of dimethyl ether, 20 ~ 30 parts of Vingon, 35 ~ 50 parts of long-chain polyether class material, 35 ~ 50 parts of isocyanates, 40 ~ 50 parts of PPG, 10 ~ 30 parts of precipitated calcium carbonate powder, 10 ~ 15 parts of glass fiber powder, 12 ~ 18 parts of crushed crude pearlite, 5 ~ 10 parts of mica powder, 5 ~ 10 parts of inorganic combustion inhibitor, 1 ~ 3 part of coalescents, 0.2 ~ 0.5 part of dispersant, 5 ~ 10 parts of bactericide, 0.3 ~ 1.5 part of levelling agent, 4 ~ 6 parts of deionized water.Preparation method carries out surface modification with long-chain polyether class material, then carries out the mixing of other compositions.Coating thermal conductivity coefficient thermal conductivity factor prepared by this method is low, rate of closed hole is high, good water-proof effect, and green.
Description
Technical field
The present invention relates to coating processing technique field, specifically a kind of waterproof polyurethane coating and preparation method thereof.
Background technology
Thermal insulation coatings can be divided into following three kinds：Isolation-type insulating moulding coating, Radiation Heat-insulated Paint, reflection type thermal insulation apply
Material.
（1）Isolation-type insulating moulding coating.Barrier insulating moulding coating is heat-insulated by being realized to the notable resistance of heat transfer
Coating.Heat transfer is realized by 3 kinds of convection current, radiation and molecular vibration heat transfer approach.Wide variety of is silicate
Class composite coating.
（2）Radiation type heat-insulation material.Sunshine light and heat of the radiation type heat-insulation material using the form radiated absorption
It is transmitted into certain wavelength in air, reaches good heat-insulating cooling effect.This heat-barrier material key technology is sent out to prepare high fever
The coating of rate is penetrated, adds Multimetal oxide, such as Fe2O3, MnO2, TiO etc. can effectively act as heat insulation effect.
（3）Reflective insulation coating.Reflective insulation coating is solar heat reflection paint, is that effect more significantly applies
Material.Mainly it is distributed according to solar spectrum energy, the portion of energy that heat is produced in sunshine is reflected away.The suitable tree of selection
The materials such as fat, metal or metal oxide prepare highly-reflective coating, so as to reach heat insulation and preservation effect.Due to heat reflection coatings
Effect is good, has vast potential for future development, turns into most widely used coating.
Polyurethane is the abbreviation of polyurethanes, English entitled Polyurethane, English abbreviation PU, be main chain containing-
A kind of high-molecular compound of NHCOO-constitutional repeating unit, by isocyanates（Monomer）It is polymerized with hydroxy compounds.Bubble
Foam plastics are one of major products of polyurethane polymer, and soft, semihard can be prepared according to the difference of raw material and formula
Matter, hard polyurethane foams, hard polyaminoester plastic foam are mostly obturator-type, and thermal conductivity factor is low, good heat insulating, water resistance
The advantages that good, ageing-resistant, intensity is high, it is widely used in temperature keeping system.Polyurethane coating has rapid curing under low temperature,
And the characteristics of easy for construction, it is widely used in multiple coating system.
Because polyurethane is as a kind of high-molecular compound, easily burn in atmosphere, and be not easy to extinguish, preparing poly- ammonia
Need to add various auxiliary agents during ester paint to improve its heat preservation water proof fire retardant effect.Most equipment and building heat preserving apply at present
Material is mainly the compositions such as perlite, mica powder, calcium carbonate, glass fibre, tiny balloon.
Chinese patent（2015101434801）, disclose a kind of soluble polyurethane external wall thermal insulation water-repellent paint and
Its preparation method, each raw material components are by weight：40 ~ 50 parts of base polyurethane prepolymer for use as；1 ~ 2 part of N hydroxymethyl acrylamide；
2 ~ 5 parts of dibutyl phthalate；0.5 ~ 1 part of vinyl trichlorosilane；10 ~ 20 parts of titanium dioxide；0.1 ~ 0.3 part of defoamer；It is super
Thin 3 ~ 10 parts of calcium carbonate；10 ~ 15 parts of mixed solvent；Preparation method:Per kilogram N hydroxymethyl acrylamide adds 2 kilograms by weight
Volumetric concentration 50-70% ethanol dissolving, then mixed in a kettle with base polyurethane prepolymer for use as, reaction temperature 80 ~ 150
DEG C, add vinyl trichlorosilane after 1 hour reaction time；Continue reaction 2 ~ 5 hours；Then the fourth of phthalic acid two is added
Ester；Rutile titanium dioxide；Methyl-silicone oil；Calcium carbonate superfine powder；Mixed solvent, it is well mixed to can obtain outside soluble polyurethane
Wall heat-proof insulation waterproof coating products.Coating made from this method has chemical resistance, good heat-insulation effect, non-aging, long-acting
The characteristics of.
And for example, Chinese patent（2014105976585）, a kind of waterproof heat-insulating coating is disclosed, the coating raw material percentage
And composition is as follows：Hollow glass micropearl 10% ~ 20%, elastomeric propylene yogurt liquid 30% ~ 45%, infrared reflection agent 5% ~
10%, diatomite 5% ~ 10%, auxiliary agent 1% ~ 5%, water 20% ~ 30%, above component summation is 100%.The invention is with hollow
Glass microballoon and infrared ray reflective agent replace traditional insulation materials, and waterproof thermal-insulated performance is more excellent, and coating layer thickness is 2mm, mitigate
Paint thickness.
And for example, Chinese patent（2013102322170）, disclose a kind of heat-insulating waterproof coating, including it is water, dispersant, poly-
Vinyl formal adhesive, defoamer, extender pigment, thickener, heat insulation and waterproofing powder and styrene-acrylic emulsion, heat insulation and waterproofing powder are work
Property calcium carbonate, crushed crude pearlite, mica powder or its any both or more persons combination.The coating water-proof better performances, effect of heat insulation
It is excellent and nonpoisonous and tasteless, do not pollute, also imitative ceramic effect.
And for example, Chinese patent（201610863625X）, a kind of nano composite heat insulation coating and preparation method thereof is disclosed,
The coating includes decentralized medium and dispersed phase, and the mass ratio between decentralized medium and dispersed phase is 1-1.5:1；Decentralized medium quality
Number and composition are：5 ~ 12 parts of high-temperature fibre, 0.5 ~ 1.5 part of surfactant, 0.5 ~ 1.5 part of thickener, binding agent 3 ~ 9
Part, 70 ~ 90 parts of water；Scattered phasor number and composition are：10 ~ 20 parts of shading powder, 45 ~ 83 parts of vacuum heat-insulation powder, SILICA FUME 2 ~ 10
Powder.Preparation method：Stirred after decentralized medium is added by mass fraction and slurry is made；System is mixed evenly in dispersed phase
Into powder, obtained powder is added to stir in obtained slurry produces nano composite heat insulation coating.The invention has
There is high temperature insulating function, and film performance is excellent.
The content of the invention
The invention aims to overcome polyurethane coating viscous glutinous effect is poor, coating is easy to crack, heat insulation effect is poor, easy
The shortcomings that mouldy, and for southern high-temperature, clammy weather, there is provided a kind of waterproof polyurethane coating.The present invention is with dimethyl ether, nothing
Machine fire retardant, glass fibre, perlite, precipitated calcium carbonate, mica powder etc. are raw material, prepare that a kind of thermal conductivity coefficient is low, water proofing property
Well, the mould excellent effect that goes out, nontoxic, green polyurethane coating are sterilized.
What the solution of the present invention was realized in：A kind of waterproof polyurethane coating, change each constituent of polyurethane coating and
Its weight part ratio be for：30 ~ 50 parts of dimethyl ether, 20 ~ 30 parts of Vingon, 35 ~ 50 parts of long-chain polyether, isocyanates 35 ~ 50
Part, 40 ~ 50 parts of PPG, 10 ~ 30 parts of precipitated calcium carbonate powder, 10 ~ 15 parts of glass fiber powder, 12 ~ 18 parts of crushed crude pearlite, cloud
5 ~ 10 parts of female powder, 5 ~ 10 parts of inorganic combustion inhibitor, 1 ~ 3 part of coalescents, 0.2 ~ 0.5 part of dispersant, 5 ~ 10 parts of bactericide, levelling agent
0.3 ~ 1.5 part, 4 ~ 6 parts of deionized water.
The technical principle that the present invention realizes：Dimethyl ether can be used as foaming agent to make in polyurethane coating in polyurethane coating
Foam aperture it is uniform in size, while the crack resistance and corrosion resistance of polyurethane coating can be strengthened；Vingon has height
The presence of crystallinity, high density and hydrophobic group, with making its oxygen transmission rate and permeable air exhaustion, polyurethane can be applied by adding Vingon
Material forms high-resistant diaphragm coating, obstructs air and aqueous vapor, is Nano grade material plus various superfines, this polyurethane coating
It is able to can reduce its thermal conductivity factor, water absorption rate close to low-density and the nano-pore ultra heat insulating material of super pore
Reduce, Kynoar can also strengthen the anti-flammability, corrosion resistance and antibiont degradability of polyurethane coating；Add lightweight carbon
Sour calcium powder can change the rheological characteristic, water resistance, weatherability of polyurethane coating；Glass fiber powder plays glue in polyurethane coating
The effect of knot, the distribution of space three-dimensional state can be formed, strengthens the elasticity of polyurethane coating, strengthens the resistance to combustion of polyurethane coating
Property, intensity, improve crack resistance, effectively prevent the generation of micro-crack；Crushed crude pearlite chemical property is stable, can reduce polyurethane painting
The thermal conductivity factor of material, improve the fire line, sound absorption properties and frost resistance of polyurethane coating；Mica powder is in the form of scale in polyurethane
In arranged in parallel, the solid and flexible protective layer of formation in coating, effectively improve the mechanical performance of polyurethane coating and resist
Telescopicing performance, extremely strong anti-ultraviolet function, this layer of protective layer can also obstruct penetrating for air and moisture.Using chitosan
Quaternary ammonium salt/diatomite/bactericide of the nanometer titanium dioxide zinc complexes as polyurethane coating, chitosan quaternary ammonium salt cation can
Negatively charged bacterium surface is adsorbed onto, reaches action site, cell is cracked and dead, the chitosan quaternary ammonium in no illumination
Salt can preferably play bactericidal action；Diatomite surface has countless pores, and adsorption capacity is strong, and Nano zinc dioxide impact-resistant is wrapped in
In diatomite, diatomaceous high-specific surface area and characterization of adsorption is made full use of to carry out light degradation sterilization, while silicon by force in illumination
Diatomaceous earth can dissociate water-molecule dissociation in atmosphere into negative ions, negative ions group using hydrone as carrier, when running into
During the harmful substances such as quick material, bacterium, mould, most active hydroxyl is carried out acutely chemical anti-with these materials in negative ions
Should, they are resolved into the innocuous substances such as hydrone, so as to prevent that polyurethane coating is mouldy.
By the superfine powder of a variety of Nano grades（Precipitated calcium carbonate powder, glass fiber powder, crushed crude pearlite, mica powder）And long-chain
Polyether substance carries out particle surface modification, it is intergranular can to reduce superfines under the conditions of low speed drying temperature is sealed
Surface energy, the compatibility between superfines is improved, improve the dispersiveness between superfine powder, increase substantially polyurethane coating
Rate of closed hole, reach higher heat insulating effect.Make modified superfines and gas of dimethyl ether by the way of injection
Mixing, makes wet stock be preferably well mixed with gas of dimethyl ether.By the interaction of various raw materials, there can be preferableization
Learn intermiscibility and stability so that polyurethane coating there can be preferable performance.
Further improved as of the invention, described long-chain polyether is aliphatic acid polyethenoxy ether, aliphatic amine polyoxyethylene
One or more kinds of combination in ether, APES.
Further improved as of the invention, the isocyanates is toluene di-isocyanate(TDI), diphenylmethane diisocyanate
One or more kinds of combination in ester.
Further improved as of the invention, described PPG be polyoxypropyleneglycol, polytetrahydrofuran diol,
One or more kinds of combination in tetrahydrofuran-propylene oxide copolymer glycols, hydroxyl value 350-650mgKOH/g, average function
Degree is more than 3.
Further improved as of the invention, described precipitated calcium carbonate powder, glass fiber powder, crushed crude pearlite, mica powder
Footpath size is 1 ~ 100nm.
Further improved as of the invention, described glass fibre is alkali-free glass fibre（Containing sodium oxide molybdena 0.2%~0.5%,
Belong to aluminium borosilicate glass）；The mica powder its chemical analysis composition such as following table.
| Chemical analysis | SiO2 | Al2O3 | K2O | Na2O | MgO | Fe2O3 | S+P | H2O |
| Title | Silica | Alundum (Al2O3) | Potassium oxide | Sodium oxide molybdena | Magnesia | Di-iron trioxide | Sulphur+phosphorus | Water |
| Content | 30~40 | 25~35 | 12~20 | 1.0~2.0 | 1.5~1.8 | 2.5~4.5 | 0.02~0.05 | 0.05 |
Further improved as of the invention, the crushed crude pearlite its chemical analysis composition such as following table.
| Composition | SiO2 | Al2O3 | Fe2O3 | CaO | K2O | Na2O | MgO | H2O |
| Content | 50~65 | 5~10 | 1.5~3.0 | 3~4 | 5~7 | 4~5 | 0.5~1.5 | 2.3~6.4 |
Further improved as of the invention, described inorganic combustion inhibitor is aluminium hydroxide, magnesium hydroxide, microencapsulation red phosphorus
Mix fire retardant.
Further improved as of the invention, described coalescents are a kind of in butyl glycol ether, 1-METHYLPYRROLIDONE
Or more than one combination.
Further improved as of the invention, described dispersant is a kind of or a kind of in sodium tripolyphosphate, calgon
Combination above.
Further improved as of the invention, described bactericide is that chitosan quaternary ammonium salt/diatomite/Nano zinc dioxide impact-resistant is multiple
Compound bactericide.
Further improved as of the invention, described levelling agent is organic silicon modified by polyether oxygen alkane, polyester resin change properties of organic silicon
One or more kinds of combination in oxygen alkane.
A kind of method for preparing described waterproof polyurethane coating, method and step include:
（1）Pre- modification：Take 10 ~ 30 parts of precipitated calcium carbonate powder, 10 ~ 15 parts of glass fiber powder, 12 ~ 18 parts of crushed crude pearlite, mica powder 5
~ 10 parts, 35 ~ 50 parts of long-chain polyether class material, 120 ~ 150r/min of low speed is sealed at a temperature of 40 ~ 50 DEG C, stirs 10 ~ 20min,
Obtain modified superfine pulvis；
（2）Material mixes：By step 1）Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether, makes it
It is sufficiently mixed, obtains mixed material A；
（3）Material reaction：By step 2）Obtained mixed material A is put into homogenizer, adds isocyanates 35 ~ 50
Part, 40 ~ 50 parts of PPG, 20 ~ 30 parts of Vingon, 5 ~ 10 parts of inorganic combustion inhibitor, 1 ~ 3 part of coalescents, dispersant
0.2 ~ 0.5 part, 5 ~ 10 parts of bactericide, 0.3 ~ 1.5 part of levelling agent, 4 ~ 6 parts of deionized water, carried out in being 60 ~ 80 DEG C in temperature high
Speed stirring, mixing speed is 1200 ~ 1600r/min, and mixing time is 30 ~ 50min, is incubated after stirring at a temperature of 40 ~ 60 DEG C
6 ~ 8h is cured, obtains waterproof polyurethane coating.
Further improved as of the invention, described high thermal-insulating waterproof polyurethane coating is applied to the insulation of silo, cabin
Freezing, refrigeration, thermostatic chamber, the insulation etc. in compartment
The present invention possesses following good result：
（1）Polyurethane coating thermal conductivity factor≤0.0230（w/m.k）;Rate of closed hole >=95%；Water absorption rate≤1.0%；Freon contains
Measure as 0.
（2）The polyurethane coating preparation method of the present invention is simple, pollution-free, simple to operate, good physical performance, flame retardant effect
It is good, it is nontoxic, improve that the rate of closed hole, thermal conductivity factor, water resistance of coating are good, and anti-mold effect is good, be particularly suitable for southern tide
The thermal-insulating waterproof of wet weather.
（3）Constructing operation is simple, and reliably, low to coated article material surface requirements, caking property is good, stability is good, it is non-aging,
It is not easy to crack.
Embodiment
A kind of waterproof polyurethane coating of the description present invention and preparation method thereof with reference to embodiments, these descriptions are not
Present invention is further limited.Precipitated calcium carbonate powder, mica powder, perlite, the particle diameter of glass fibre and quality will
Ask as follows.
Precipitated calcium carbonate powder：Particle size is 1 ~ 100nm.
Mica powder：Particle size is 1 ~ 100nm, 30 ~ 40%SiO2,25 ~ 35%Al2O3,12 ~ 20%K2O, 1.0 ~ 2.0%
Na2O, 1.5 ~ 1.8%MgO, 2.5 ~ 4.5%Fe2O3,0.02 ~ 0.05%S+P, 0.05%H2O.
Crushed crude pearlite：Particle size is mesh, 50 ~ 65%SiO2, 5 ~ 10%Al2O3, 1.5 ~ 3.0%Fe2O3, 3 ~ 4%CaO, 5 ~ 7%
K2O, 4 ~ 5%Na2O, 0.5 ~ 1.5%MgO, 2.3 ~ 6.4H2O
Glass fiber powder：Particle size is 1 ~ 100nm, containing sodium oxide molybdena 0.2%~0.5%, belongs to aluminium borosilicate glass.
Embodiment 1：
Pre- modification：Take 10 parts of precipitated calcium carbonate powder, 12 parts of glass fiber powder, 17 parts of crushed crude pearlite, 8 parts of mica powder, fatty acid polyglycol
340 parts of oxygen vinethene, low speed 150r/min is sealed at a temperature of 40 DEG C, stir 12min, obtain modified superfine pulvis；
Material mixes：Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether, is sufficiently mixed it,
Obtain mixed material A；
Material reaction：Obtained mixed material A is put into homogenizer, adds methyl diphenylene diisocyanate 40
Part, 50 parts of polytetrahydrofuran diol, 22 parts of Vingon, 10 parts of inorganic combustion inhibitor, 2 parts of butyl glycol ether, sodium tripolyphosphate
0.25 part, 5 parts of bactericide, 0.9 part of levelling agent, 5 parts of deionized water, temperature be 80 DEG C in carry out high-speed stirred, mixing speed
For 1300r/min, mixing time 45min, insulation cures 6.5h at a temperature of 40 DEG C after stirring, obtains waterproof polyurethane painting
Material.
Embodiment 2：
Pre- modification：20 parts of precipitated calcium carbonate powder, 10 parts of glass fiber powder, 14 parts of crushed crude pearlite, 5 parts of mica powder, fatty amine is taken to gather
35 parts of oxygen vinethene, low speed 110r/min is sealed at a temperature of 48 DEG C, stir 15min, obtain modified superfine pulvis；
Material mixes：Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether, is sufficiently mixed it,
Obtain mixed material A；
Material reaction：Obtained mixed material A is put into homogenizer, adds 35 parts of toluene di-isocyanate(TDI), tetrahydrochysene
It is furans -43 parts of propylene oxide copolymer glycols, 30 parts of Vingon, 5 parts of inorganic combustion inhibitor, 1 part of 1-METHYLPYRROLIDONE, six inclined
0.4 part of sodium phosphate, 10 parts of bactericide, levelling agent 1.5,4.5 parts of deionized water, high-speed stirred is carried out in being 65 DEG C in temperature, is stirred
It is 1200r/min, mixing time 30min to mix speed, and insulation cures 6h at a temperature of 60 DEG C after stirring, obtains waterproof polyurethane
Coating.
Embodiment 3：
Pre- modification：30 parts of precipitated calcium carbonate powder, 14 parts of glass fiber powder, 12 parts of crushed crude pearlite, 7 parts of mica powder, fatty amine is taken to gather
50 parts of oxygen vinethene, low speed 100r/min is sealed at a temperature of 43 DEG C, stir 10min, obtain modified superfine pulvis；
Material mixes：Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether, is sufficiently mixed it,
Obtain mixed material A；
Material reaction：Obtained mixed material A is put into homogenizer, adds methyl diphenylene diisocyanate 45
Part, polyoxypropyleneglycol, polytetrahydrofuran diol and tetrahydrofuran -40 parts of propylene oxide copolymer glycols mixture, gather inclined chlorine
28 parts of ethene, 6 parts of inorganic combustion inhibitor, 3 parts of butyl glycol ether, 0.2 part of sodium tripolyphosphate, 6 parts of bactericide, 0.3 part of levelling agent, go
5.5 parts of ionized water, high-speed stirred is carried out in being 60 DEG C in temperature, mixing speed 1400r/min, mixing time 50min, is stirred
Insulation cures 8h at a temperature of 45 DEG C after mixing, and obtains waterproof polyurethane coating.
Embodiment 4：
Pre- modification：15 parts of precipitated calcium carbonate powder, 15 parts of glass fiber powder, 16 parts of crushed crude pearlite, 10 parts of mica powder, alkyl phenol is taken to gather
48 parts of oxygen vinethene, low speed 130r/min is sealed at a temperature of 50 DEG C, stir 18min, obtain modified superfine pulvis；
Material mixes：Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether, is sufficiently mixed it,
Obtain mixed material A；
Material reaction：Obtained mixed material A is put into homogenizer, adds methyl diphenylene diisocyanate 50
Part, 45 parts of polyoxypropyleneglycol, 26 parts of Vingon, 7 parts of inorganic combustion inhibitor, 2.5 parts of 1-METHYLPYRROLIDONE, trimerization phosphorus
Sour 0.3 part of sodium and calgon mixture, 9 parts of bactericide, 0.6 part of levelling agent, 4 parts of deionized water, in temperature is 70 DEG C
High-speed stirred is carried out, mixing speed 1500r/min, mixing time 40min, is incubated curing after stirring at a temperature of 50 DEG C
7h, obtain waterproof polyurethane coating.
Embodiment 5：
Pre- modification：Take 25 parts of precipitated calcium carbonate powder, 13 parts of glass fiber powder, 18 parts of crushed crude pearlite, 6 parts of mica powder, fatty acid polyglycol
Oxygen vinethene, aliphatic amine polyoxyethylene ether, 45 parts of APES mixture, low speed is sealed at a temperature of 46 DEG C
140r/min, 20min is stirred, obtains modified superfine pulvis；
Material mixes：Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether, is sufficiently mixed it,
Obtain mixed material A；
Material reaction：Obtained mixed material A is put into homogenizer, adds 47 parts of toluene di-isocyanate(TDI), polyoxy
Change 47 parts of propylene glycol, 20 parts of Vingon, 9 parts of inorganic combustion inhibitor, butyl glycol ether and 1-METHYLPYRROLIDONE mixture
1.5 parts, 0.5 part of calgon, 8 parts of bactericide, 1.2 parts of levelling agent, 6 parts of deionized water, carried out in being 75 DEG C in temperature high
Speed stirring, mixing speed 1600r/min, mixing time 35min, insulation cures 7.5h at a temperature of 55 DEG C after stirring, obtains
To waterproof polyurethane coating.
Physical function parameter test, test result such as table 1 are carried out to high thermal-insulating waterproof polyurethane coating made from implementation column
It is shown.
Table 1
| Performance indications | Unit | Testing standard | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Density | kg/m3 | GB/T6343 | 210.4 | 201.6 | 220.3 | 224.6 | 201.8 |
| Thermal conductivity factor | W/(M.K) | GB/T3399 | 0.0230 | 0.0189 | 0.0179 | 0.0163 | 0.0167 |
| Rate of closed hole | % | GB/T10799 | 95.1 | 96.7 | 97.8 | 96.9 | 95.4 |
| Water absorption rate | % | GB/T8810 | 0.88 | 0.74 | 0.10 | 0.89 | 0.95 |
| Oxygen index (OI) | % | GB/T2406 | 32.5 | 34.6 | 32.9 | 34.6 | 33.2 |
| Dimensional stability（70℃48h） | % | GB/T8811 | 0.81 | 0.94 | 0.86 | 0.79 | 0.84 |
| Tearing strength | N/mm | GB/T529 | 5.6 | 4.8 | 4.6 | 5.3 | 4.8 |
| Adhesion strength | KPa | GB/T12954 | 1145.2 | 1203.6 | 1231.6 | 1062.3 | 1207.4 |
| Compression strength | KPa | GB/T8813 | 245 | 242 | 241 | 243 | 247 |
| Tensile strength | Kpa | JGJ144 | 271 | 267 | 273 | 265 | 276 |
The above embodiment of the present invention scheme is only the description of the invention and can not limit the present invention, and this is indicated in claim
Invention product form composition, Ingredient Amount scope, the scope of preparation method parameter, and above-mentioned explanation does not point out ginseng of the present invention
Several scopes, therefore, any change within the meaning and scope equivalent to the claims of the present invention, all it is considered to be
It is included within the scope of the claims.
The present invention be by multidigit coating processing staff's long-term work experience accumulation, and by creative work create and
Go out, this kind high thermal-insulating waterproof polyurethane coating function admirable, security is good.
Claims (9)
1. a kind of waterproof polyurethane coating, it is characterized in that, each constituent of waterproof polyurethane coating and its weight part ratio are：Two
30 ~ 50 parts of methyl ether, Vingon 20-30 parts, 35 ~ 50 parts of long-chain polyether class material, 35 ~ 50 parts of isocyanates, polyether polyols
40 ~ 50 parts of alcohol, 10 ~ 30 parts of precipitated calcium carbonate powder, 10 ~ 15 parts of glass fiber powder, 12 ~ 18 parts of crushed crude pearlite, 5 ~ 10 parts of mica powder,
5 ~ 10 parts of inorganic combustion inhibitor, 1 ~ 3 part of coalescents, 0.2 ~ 0.5 part of dispersant, 5 ~ 10 parts of bactericide, 0.3 ~ 1.5 part of levelling agent,
Deionized water 4-6 parts.
2. a kind of waterproof polyurethane coating according to claim 1, it is characterized in that, described long-chain polyether class material is fat
One or more kinds of combination in fat acid APEO, aliphatic amine polyoxyethylene ether, APES；It is described different
Cyanate is combinations one or more kinds of in toluene di-isocyanate(TDI), methyl diphenylene diisocyanate；Described polyethers
Polyalcohol is polyoxypropyleneglycol, polytetrahydrofuran diol, in tetrahydrofuran-propylene oxide copolymer glycols it is a kind of or it is a kind of with
On combination, hydroxyl value 350-650mgKOH/g, average functionality is more than 3.
3. a kind of waterproof polyurethane coating according to any one of claim 1 ~ 2, it is characterized in that, described precipitated calcium carbonate
Powder, glass fiber powder, crushed crude pearlite, mica powder particle size are 1 ~ 100nm；Described inorganic combustion inhibitor is aluminium hydroxide, hydrogen
The mixing fire retardant of magnesia, microencapsulation red phosphorus；Described coalescents are a kind of in butyl glycol ether, 1-METHYLPYRROLIDONE
Or more than one combination.
4. a kind of waterproof polyurethane coating according to claim 1 or 2, it is characterized in that, described dispersant is trimerization phosphorus
One or more kinds of combination in sour sodium, calgon；Described bactericide is that chitosan quaternary ammonium salt/diatomite/bis- receive
Rice zinc oxide compound disinfectant, is prepared using hydro-thermal method；Described levelling agent is organic silicon modified by polyether oxygen alkane, polyester modification
One or more kinds of combination in organosiloxane.
5. a kind of method for preparing the waterproof polyurethane coating described in claim any one of 1-3, it is characterized in that, preparation method step
Suddenly include:
Step 1）Pre- modification：10 ~ 30 parts of precipitated calcium carbonate powder, 10 ~ 15 parts of glass fiber powder, 12 ~ 18 parts of crushed crude pearlite, mica powder
5 ~ 10 parts, 35 ~ 50 parts of long-chain polyether class material, sealing 120 ~ 150r/min of low speed at a temperature of 40 ~ 50 DEG C, stirring 10 ~
20min, obtain modified superfine pulvis；
Step 2）Material mixes：By step 1）Obtained modified superfine pulvis is ejected into the reactor equipped with gas of dimethyl ether,
It is sufficiently mixed, obtains mixed material A；
Step 3）Material reaction：By step 2）Obtained mixed material A is put into homogenizer, and addition isocyanates 35 ~
50 parts, it is 40 ~ 50 parts of PPG, 20 ~ 30 parts of Vingon, 5 ~ 10 parts of inorganic combustion inhibitor, 1 ~ 3 part of coalescents, scattered
0.2 ~ 0.5 part of agent, 5 ~ 10 parts of bactericide, 0.3 ~ 1.5 part of levelling agent, 4 ~ 6 parts of deionized water, carried out in being 60 ~ 80 DEG C in temperature
High-speed stirred, mixing speed are 1200 ~ 1600r/min, and mixing time is 30 ~ 50min, is protected after stirring at a temperature of 50 ~ 60 DEG C
Temperature curing 6h, obtains waterproof polyurethane coating.
6. the method according to claim 5 for preparing waterproof polyurethane coating, it is characterized in that, described long-chain polyether class thing
Matter is combinations one or more kinds of in aliphatic acid polyethenoxy ether, aliphatic amine polyoxyethylene ether, APES；
The isocyanates is combinations one or more kinds of in toluene di-isocyanate(TDI), methyl diphenylene diisocyanate；It is described
PPG be polyoxypropyleneglycol, polytetrahydrofuran diol, it is a kind of in tetrahydrofuran-propylene oxide copolymer glycols or
More than one combination, hydroxyl value 350-650mgKOH/g, average functionality is more than 3.
7. the method according to claim 5 for preparing waterproof polyurethane coating, it is characterized in that, described precipitated calcium carbonate
Powder, glass fiber powder, crushed crude pearlite, mica powder particle size are 1 ~ 100nm；Described inorganic combustion inhibitor is aluminium hydroxide, hydrogen
The mixing fire retardant of magnesia, microencapsulation red phosphorus；Described coalescents are a kind of in butyl glycol ether, 1-METHYLPYRROLIDONE
Or more than one combination.
8. the method according to claim 5 for preparing waterproof polyurethane coating, it is characterized in that, described dispersant is trimerization
One or more kinds of combination in sodium phosphate, calgon；Described bactericide is that chitosan quaternary ammonium salt/diatomite/is received
The compound bactericide of rice zinc oxide, is prepared using hydro-thermal method；Described levelling agent is organic silicon modified by polyether oxygen alkane, polyester changes
One or more kinds of combination in property organosiloxane.
9. the coating obtained by a kind of waterproof polyurethane preparation method for coating according to claim 5 is applied to the guarantor of silo
Temperature, the freezing of cabin, refrigeration, thermostatic chamber, the insulation aspect in compartment.
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