CN101608094A - A kind of bicomponent high-strength sprayed polyurethane waterproof paint - Google Patents
A kind of bicomponent high-strength sprayed polyurethane waterproof paint Download PDFInfo
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- CN101608094A CN101608094A CNA2008101151501A CN200810115150A CN101608094A CN 101608094 A CN101608094 A CN 101608094A CN A2008101151501 A CNA2008101151501 A CN A2008101151501A CN 200810115150 A CN200810115150 A CN 200810115150A CN 101608094 A CN101608094 A CN 101608094A
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- polyether
- polyurethane waterproof
- waterproof paint
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Abstract
The present invention proposes a kind of bicomponent high-strength sprayed polyurethane waterproof paint.It is made up of by 1: 1 volume ratio A component and B component; Wherein, the A component is polyisocyanates and the polyether glycol synthetic semi prepolymer by low functionality; By weight, polyisocyanates is 50～80 parts, and functionality is 2.0～2.4; Polyether glycol is 20～50 parts, and functionality is 2～4; The B component comprises 40～84 parts of polyether glycols or Amino Terminated polyether(ATPE) or their mixture, 10～40 parts of amine chain extender or alcohols chainextender or their mixture, 0～20 part of color stuffing and auxiliary agent.The present invention possesses the mechanical property close even higher with waterproof roll, and adopt the constructional method that sprays, and convenient and efficient, the while has prolonged the work-ing life of water-proof material widely, solvent-free system has also greatly guaranteed the environmental requirement of material, more reliable performance, more efficient, more environmental protection.Compare with the conventional waterproof material and can have high strength, high elongation rate simultaneously.
Description
Technical field
The present invention relates to a kind of polyurethane water-proof paint, relate in particular to a kind of bicomponent high-strength sprayed polyurethane waterproof paint, it can be used for the waterproofing work of various buildings or structures.
Background technology
In the waterproof field of buildings or structures, mainly based on coiled material and coating two big class materials.The drawback that the coiled material construction exists is to basic unit's water content requirement height, paving difficulty when base shape is complicated, and polylith splicing meeting influence is attractive in appearance; The coiled material seam is many in addition and the seam imprecision easily causes string water, seepage finally occurs, and the maintenance after leaking also is a difficult problem; Moreover domestic supporting sizing agent poor performance, construction quality is difficult to guarantee.
Waterproof paint mainly comprises water soluble acrylic acid, silicon rubber and urethane etc., can overcome the deficiency that above-mentioned coiled material exists.Wherein polyurethane coating is a kind of type material that 20 th century later grow up, and enters China water-proof material market in the seventies in last century, is widely used in roofing, underground works and kitchen and toilet, has obtained the excellent waterproof effect.But all there is following tangible deficiency in these waterproof paints: form of construction work is scraped for being coated with, because set time is long, and facade is thick easy sagging when being coated with, the construction that needs multiple tracks to construct just to reach between design thickness and the coating is long pitch time, causes operating efficiency low; Film unit elongation height and tensile strength and tear strength deficiency are subjected to the external force damage easily in construction process; And cohesive strength is lower, does not reach the service requirements of key state projects such as top-grade building and high-speed railway to water-proof material with the cohesive strength of concrete cohesive strength, particularly moist basal plane; In addition, contain organic solvent in the common double part polyurethane waterproof paint, can produce the volatilization of organic solvent during construction, thereby cause the pollution of environment and the injury of human body.
Summary of the invention
The high-strength sprayed polyurethane waterproof paint that the purpose of this invention is to provide a kind of high solids content, two-pack rapid reaction moulding.It has overcome above material some shortcomings separately, possess the mechanical property close even higher with waterproof roll, and the constructional method of employing spraying, convenient and efficient, prolonged simultaneously the work-ing life of water-proof material widely, solvent-free system has also greatly guaranteed the environmental requirement of material, more reliable performance, more efficient, more environmental protection.And this material is compared with the conventional waterproof material can have high strength, high elongation rate simultaneously, can realize waterproof, wear-resisting, decoration integrated under the special applications condition.
Bicomponent high-strength sprayed polyurethane waterproof paint of the present invention is made up of by 1: 1 volume ratio A component and B component.
The A component is polyisocyanates and the polyether glycol synthetic semi prepolymer by low functionality; By weight, polyisocyanates is 50～80 parts, and functionality is 2.0～2.4; Polyether glycol is 20～50 parts, and functionality is 2～4.
Polyisocyanates used in the A component can adopt aromatic polyisocyanate, as ditane-4, and 4 ' vulcabond (MDI), poly methylene poly phenyl poly isocyanate (PAPI), liquefaction type '-diphenylmethane diisocyanate (LMDI) or its mixture; Also can adopt aliphatic polyisocyante, as hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI) or phenylenedimethylidyne isocyanic ester (XDI) etc.Preferred ditane-4,4 ' vulcabond (MDI), liquefaction type '-diphenylmethane diisocyanate (LMDI) or the mixture of the two, functionality is most typical to be 2.0～2.1.
Used polyether glycol is selected from the polyoxytrimethylene polyvalent alcohol in the A component, and its hydroxyl equivalent is between 500～3000; Based on dibasic alcohol, also can mix the part trivalent alcohol.
The synthetic method of A component: the polyisocyanates adding of accurate measurement is equipped with in the reactor of agitator, thermometer, charging opening, charge into nitrogen, evenly stir, be heated to 50～80 ℃, in still, drip accurate measurement, through the polyether glycol of processed, insulation while stirring, after dropwising, insulation is 3 hours between 60～90 ℃, and sampling and measuring isocyanate group (NCO) content is between 10～18%, cooling discharging promptly gets the A component.
The B component comprises 40～84 parts of polyether glycols or Amino Terminated polyether(ATPE) or their mixture, 10～40 parts of amine chain extender or alcohols chainextender or their mixture, 0～20 part of color stuffing and auxiliary agent.
Used polyether glycol can be that number-average molecular weight is 300～5000 polyether Glycols, polyether-tribasic alcohol in the B component; Used polyether glycol also comprises high activity polyether glycol and/or the polyether triol that has than high proportion of primary OH groups, is preferably proportion of primary OH groups greater than 70% high activity polyether glycol and/or polyether triol.
In the B component used Amino Terminated polyether(ATPE) can be two functionality or three-functionality-degree with primary amine or secondary amine terminated polyether, or their mixture.The Jeffamine of U.S. Huntsman company for example
D-230, T-403, D-2000, T-5000 etc.
Under both blended situations, the used polyether glycol and the ratio of Amino Terminated polyether(ATPE) are variable in the B component, and the reactive behavior of Amino Terminated polyether(ATPE) and isocyanic ester is very high, by adjusting that its consumption can reduce catalyst levels or without catalyzer.
Used amine chain extender can be a quadrol, 3 in the B component, 3 '-two chloro-4,4 '-diaminodiphenyl-methane (for example MOCA of the extraordinary Fine Chemical Co., Ltd of Suzhou Xiang Yuan), the diethyl toluene diamine (Ethacure of U.S. Albemarle company for example
100), the diformazan sulfenyl tolylene diamine (Ethacure of U.S. Albemarle company for example
300), N, the N '-dialkyl methyl pentanoic (Unilin of U.S. DorfKetal company for example
4200), N, the N '-dialkyl benzene diamines (Unilink of U.S. DorfKetal company for example
4100), the aliphatic polyamine (Jefamine of U.S. Huntsman company for example
T-403, D-400, D-230, Jefflink
TM555, Jefflink
TM754) etc.The alcohols chainextender mainly contains ethylene glycol, 1,4-butyleneglycol, glycerol, trihydroxy-propane, trolamine etc.Choose wherein a kind of or two or more mixture wherein, blending ratio can be determined according to the needs of final film performance.
Under both blended situations, the used amine chain extender and the ratio of alcohols chainextender are variable in the B component, and the reactive behavior of amine chain extender and isocyanic ester is very high, improve that its consumption can reduce catalyst levels or without catalyzer.
Can in the B component, add catalyzer as required.Catalyst system therefor can be an organometallic compound, as dibutyl tin dilaurate (DBTDL), stannous octoate or metallic naphthenate etc.; Also can be tertiary amine catalyst, as triethylenediamine, dimethylethanolamine or trolamine etc.
Can in the B component, add oxidation inhibitor, ultraviolet absorbers as required, preferably oxidation inhibitor and the ultraviolet absorbers that has synergistic effect mutually.
Can in the B component, add color stuffing as required, for example a kind of or its combination in lime carbonate, barium sulfate, kaolin, talcum powder, perlite, aerosil, carbon black, titanium dioxide, phthalocyanine blue and the red.
Can in the B component, add necessary coatings additive(s) as required, as flow agent, wetting dispersing agent, defoamer, anti-settling agent, hydrolysis stabilizer etc., the quality of filming with raising.Add auxiliary agent kind and the amount be that can change and suitable.
The preparation method of B component: earlier the color stuffing after a certain amount of dehydration, auxiliary agent and an amount of polyether glycol or Amino Terminated polyether(ATPE) are ground on closed sand mill, be ground to fineness to reach≤30 μ m after, ground slurry is dropped in the reactor, supply other composition in the prescription, mix the back discharging, promptly get the B component.
The A component of spraying polyurethane coating high-strength elastic waterproof paint of the present invention and B component are used by 1: 1 volume ratio, after two components of A, B are measured, heat up, pressurize in the high pressure painting equipment of 1: 1 (volume ratio) fixed proportion, spray to again on the ground after mixing by spray gun, solidify and obtain high-strength sprayed polyurethane waterproof paint.
Spraying equipment can use H-3500 or H-20/35 main frame and the GX-7 or the GX-8 spray gun of U.S. Gusmer company, the MX/MH main frame of Glas-Craft company and Probler spray gun, the Hydra-Cat main frame of Graco company and Foam-Cat spray gun etc.
Bicomponent high-strength sprayed polyurethane waterproof paint of the present invention has advantages such as solid content height, asepsis environment-protecting, fast setting, operating efficiency height; Under the prerequisite that guarantees elongation at break, tensile strength, tear strength and cohesive strength index obviously are better than the index among the existing GB GB/T 19250-2003 " polyurethane water-proof paint ", and dependable performance satisfies high-grade waterproof requirement.
Bicomponent high-strength sprayed polyurethane waterproof paint of the present invention can be used for the high-grade waterproofing work of various buildings or structures; water proof anti-seepage and concrete protective as roof of buildings and vault, subway, road and bridge, pond etc.; especially for high-speed railway provides quality products, satisfy the product requirement of high speed rail system to high-performance, high quality, easy construction and environmental protection.
Embodiment
The present invention is described further below in conjunction with specific embodiment, and following each embodiment only is used to the present invention is described but not limitation of the present invention.
Embodiment 1
30.8 parts MDI-100,27.0 parts MDI-50 added fill in the reactor of nitrogen, be heated to 60 ℃, in still, drip equivalent and be 42.2 parts of 1000 polyether glycols, after dropwising, insulation is 3 hours between 60～90 ℃, obtains NCO% and be 15% A component.The B component by two functionality and 46 parts in three-functionality-degree Amino Terminated polyether(ATPE) mixture, mix 18 parts of 36 parts of amine chain extender, pigment and various auxiliary agents and evenly make through grinding dispersed with stirring.
A, B component form polyurethane waterproof coating through the H-20/35 main frame and the spraying in 1: 1 by volume of GX-7 spray gun of U.S. Gusmer company, and this Main physical performance of filming sees Table 1.
Table 1
| Project | Index | Project | Index |
| Gel time/s | ??12 | Low-temperature bending/℃ | -35 ℃ of flawlesses |
| Solid content/% | ??99.8 | Watertightness (0.3MPa 30min) | Waterproof |
| Tensile strength/MPa | ??16 | Moist basal plane cohesive strength/MPa | ??1.1 |
| Elongation at break/% | ??450 | Dry basal plane cohesive strength/MPa | ??2.7 |
| Tear strength/(kN/m) | ??80 |
Embodiment 2
59.6 parts MDI-100 are added fill in the reactor of nitrogen, be heated to 60 ℃, drip equivalent and be 30.4 parts of 1000 polyether glycols in still, after dropwising, insulation is 3 hours between 60～90 ℃, obtains NCO% and be 16% A component.The B component is by 84 parts in mixture, the Ethacure of common polyether glycol and polyether polyol with high activity
10012 parts, pigment and auxiliary agent 4 parts (wherein containing 0.1 part of organo-metallic catalyst) are uniformly dispersed through high-speed stirring and make.
A, B component form polyurethane waterproof coating through the H-20/35 main frame and the spraying in 1: 1 by volume of GX-7 spray gun of U.S. Gusmer company, and this Main physical performance of filming sees Table 2.
Table 2
| Project | Index | Project | Index |
| Gel time/s | ??20 | Low-temperature bending/℃ | -35 ℃ of flawlesses |
| Solid content/% | ??99.7 | Watertightness (0.3MPa 30min) | Waterproof |
| Tensile strength/MPa | ??8 | Moist basal plane cohesive strength/MPa | ??0.8 |
| Elongation at break/% | ??500 | Dry basal plane cohesive strength/MPa | ??2.6 |
| Tear strength/(kN/m) | ??38 |
Embodiment 3
78 parts MDI and LMDI added fill in the reactor of nitrogen, be heated to 60 ℃, drip equivalent and be 22 parts of 2000 polyether glycols in still, after dropwising, insulation is 3 hours between 60～90 ℃, obtains NCO% and be 18% A component.The B component is by 70 parts in the mixture of D-2000 and polyether polyol with high activity, 1,15 parts of 4-butyleneglycols, Ethacure
10 parts of 1005 parts, pigment and auxiliary agents (wherein 0.3 part of catalyzer triethylenediamine, 2 parts of flow agents, oxidation inhibitor and ultraviolet absorbers are 1 part) are uniformly dispersed through high-speed stirring and make.
Claims (16)
1, a kind of bicomponent high-strength sprayed polyurethane waterproof paint is characterized in that, it is made up of by 1: 1 volume ratio A component and B component; Wherein, the A component is polyisocyanates and the polyether glycol synthetic semi prepolymer by low functionality; By weight, polyisocyanates is 50～80 parts, and functionality is 2.0～2.4; Polyether glycol is 20～50 parts, and functionality is 2～4; The B component comprises 40～84 parts of polyether glycols or Amino Terminated polyether(ATPE) or their mixture, 10～40 parts of amine chain extender or alcohols chainextender or their mixture, 0～20 part of color stuffing and auxiliary agent.
2, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1 is characterized in that, polyisocyanates used in the A component adopts aromatic polyisocyanate or aliphatic polyisocyante; Wherein, aromatic polyisocyanate adopts ditane-4,4 ' vulcabond, poly methylene poly phenyl poly isocyanate, liquefaction type '-diphenylmethane diisocyanate or its mixture; Aliphatic polyisocyante adopts hexamethylene diisocyanate, isophorone diisocyanate or phenylenedimethylidyne isocyanic ester.
3, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 2, it is characterized in that, used polyisocyanates preferred ditane-4 in the A component, 4 ' vulcabond, liquefaction type '-diphenylmethane diisocyanate or the mixture of the two, functionality is most typical to be 2.0～2.1.
4, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1 is characterized in that, used polyether glycol is selected from the polyoxytrimethylene polyvalent alcohol in the A component, and its hydroxyl equivalent is between 500～3000; Based on dibasic alcohol, also can mix the part trivalent alcohol.
5, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1 is characterized in that, used polyether glycol is that number-average molecular weight is 300～5000 polyether Glycols and or polyether-tribasic alcohol in the B component.
6, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 5 is characterized in that, used polyether glycol also comprises the high activity polyether two pure and mild or polyether triols that have than high proportion of primary OH groups in the B component.
7, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 6 is characterized in that, the used preferred proportion of primary OH groups of polyether glycol is greater than 70% high activity polyether two pure and mild or polyether triols in the B component.
8, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1 is characterized in that, in the B component used Amino Terminated polyether(ATPE) be two functionality or three-functionality-degree with primary amine or secondary amine terminated polyether, or their mixture.
9, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1, it is characterized in that, polyether glycol and Amino Terminated polyether(ATPE) ratio under both blended situations used in the B component are variable, the reactive behavior of Amino Terminated polyether(ATPE) and isocyanic ester is very high, by adjusting that its consumption can reduce catalyst levels or without catalyzer.
10, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1, it is characterized in that, used amine chain extender is a quadrol, 3 in the B component, 3 '-two chloro-4,4 '-diaminodiphenyl-methane, diethyl toluene diamine, diformazan sulfenyl tolylene diamine, N, N '-dialkyl methyl pentanoic, N, N '-dialkyl benzene diamines, aliphatic polyamine; Can choose wherein a kind of or two or more mixture wherein, blending ratio can be determined according to the needs of final film performance.
11, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1 is characterized in that, used alcohols chainextender is an ethylene glycol, 1 in the B component, 4-butyleneglycol, glycerol, trihydroxy-propane, trolamine; Can choose wherein a kind of or two or more mixture wherein, blending ratio can be determined according to the needs of final film performance.
12, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 1, it is characterized in that, amine chain extender and alcohols chainextender ratio under both blended situations used in the B component are variable, the reactive behavior of amine chain extender and isocyanic ester is very high, improves that its consumption can reduce catalyst levels or without catalyzer.
13, according to arbitrary described bicomponent high-strength sprayed polyurethane waterproof paint among the claim 1-8,10,11, it is characterized in that, in the B component, add catalyzer as required; Catalyst system therefor can be an organometallic compound, as dibutyl tin dilaurate, stannous octoate or metallic naphthenate; Also can be tertiary amine catalyst, as triethylenediamine, dimethylethanolamine or trolamine.
14, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 13 is characterized in that, adds oxidation inhibitor or ultraviolet absorbers as required in the B component, preferably oxidation inhibitor and the ultraviolet absorbers that has synergistic effect mutually.
15, according to claim 1 or 14 described bicomponent high-strength sprayed polyurethane waterproof paints, it is characterized in that color stuffing is a kind of or its combination in lime carbonate, barium sulfate, kaolin, talcum powder, perlite, aerosil, carbon black, titanium dioxide, phthalocyanine blue and the red in the B component.
16, bicomponent high-strength sprayed polyurethane waterproof paint according to claim 15 is characterized in that, adds necessary coatings additive(s) in the B component, as flow agent, wetting dispersing agent, defoamer, anti-settling agent or hydrolysis stabilizer; Add auxiliary agent kind and the amount be that can change and suitable.
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2008
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