CN105038564B - A kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint - Google Patents

A kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint Download PDF

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CN105038564B
CN105038564B CN201510360424.3A CN201510360424A CN105038564B CN 105038564 B CN105038564 B CN 105038564B CN 201510360424 A CN201510360424 A CN 201510360424A CN 105038564 B CN105038564 B CN 105038564B
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polyurethane water
added
preparation
environment
friendly type
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CN105038564A (en
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万晓波
穆有炳
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Qingdao Zhongke Run Tang New Mstar Technology Ltd
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Qingdao Zhongke Run Tang New Mstar Technology Ltd
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Abstract

The present invention relates to a kind of preparation methods of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint, are mainly characterized by:The polyols blend of polyfunctionality polyether polyol and poly-dihydric alcohol is added in reaction kettle, isocyanates is added after dehydration, 50 80 DEG C of 1 4h of reaction, it is down to room temperature, plasticizer, antifoaming agent, antioxidant and the ultra-violet absorber being pre-dried is added, polyurethane water-proof paint is made after mixing.It the advantage is that:1) raw materials used cheap and easy to get, synthetic method is simple and direct efficiently, at low cost, the amplification of easily operated process and realization industrialized production;2) polyurethane resin can form fine and close polyurethane elastomer film using water as curing agent after the air set with certain humidity, have tight security.Fine and close cross-linked network structure can be formed due to introducing polyfunctionality active group, after solidification, and there is excellent mechanical property(Film tensile strength is more than 6MPa, and elongation at break is more than 1000%), a kind of excellent waterproof material is can be used as, is had a extensive future.

Description

A kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint
Technical field
The present invention relates to a kind of preparation methods of building trade field Environmental-protecwaterproof waterproof paint more particularly to one kind to have High tensile, high elongation at tear wet-solidifying single-component polyurethane water-repellent paint preparation method.
Background technology
The surface waterproofing can effectively protect building of building concrete is extended building service life, built by water erosion Building waterproofing is most important.In the water-repellent paint of numerous commercial applications, polyurethane water-proof paint due to its film have elasticity and Good-extensibility, tensile strength are high, caking property is good, volume contraction is small, film waterproof material seamless, the change to basic crack retractility Shape has stronger adaptability, and working drawing review is convenient (being amorphous viscous liquid substance before polyurethane water-proof paint solidification), Any complicated substrate surface is easy to construct, can easily be accommodated the features such as component ratio, can be used for building different parts Waterproofing and leakage-stopping, play an important role in waterproof field.
Polyurethane water-proof protective coating is mainly the following:Asphalt polyurethane water-proof paint, mono-component polyurethane waterproof Coating, Two-component Waterproof Polyurethane Coating, aqueous polyurethane water-repellent paint, spray polyurea elastomer water-repellent paint.Wherein one-component Polyurethane water-proof paint because its is easy for construction, eliminate construction before burden process, will not occur measure mistake the advantages that it is current It is greatly developed, the patent of this respect includes:CN201110007526.9、CN201110033097.2、 CN201110333955.5、CN201210537883.0、CN201310041967.X、CN201410038016.1、 CN201410210676.3, CN201410459714.9, CN201410294925.1 etc..Although current monocomponent polyurethane waterproof The defects of coating has obtained good progress, but that there are still mechanical performances is bad, low to the adhesive force in base, poor water resistance, no The construction related request of some architectural engineerings at present can be met;It is of high cost, it is difficult to large-scale promotion application.
In order to overcome the problems referred above, the present invention develops a kind of poly-dihydric alcohol based on full hydrophobic structure and polyfunctionality is poly- The single-component polyurethane water-proof paint of ethoxylated polyhydric alcohol, by the way that the well-designed of polyurethane resin molecular structure, control crosslinking is close Degree and cross-linked network structure have been synthesized with high mechanical properties, good water resistance, wet solid to one-component that base adhesive force is excellent Change polyurethane water-proof paint.The polyurethane resin, can shape after the air set with certain humidity using water as curing agent At fine and close polyurethane elastomer film, there is tight security.It is at low cost, it is expected in reality since its synthesis technology is simple Large-scale application is obtained in production.
Invention content
There are high mechanical properties, good water resistance, excellent to base adhesive force the purpose of the present invention is to provide a kind of The preparation method of one-component solvent-free polyurethane water-repellent paint, to solve existing polyurethane water-proof paint bad mechanical property, cost The problems such as high.
To achieve the above object, the present invention develops a kind of poly-dihydric alcohol based on full hydrophobic structure and polyfunctionality is poly- The single-component polyurethane water-proof paint of ethoxylated polyhydric alcohol, preparation method are:
The polyols blend of polyfunctionality polyether polyol and poly-dihydric alcohol is added in reaction kettle, is added after dehydration different Cyanate, 50-80 DEG C of reaction 1- 4h, is down to room temperature, and the plasticizer being pre-dried, antifoaming agent, antioxidant and ultraviolet is added Polyurethane water-proof paint is made in light absorbers after mixing;
Wherein, polyfunctionality polyether polyol used be polypropylene glycerol aether or polyoxypropylene pentaerythrite ether, poly- two First alcohol is polypropylene glycol or polytetrahydrofuran diol, and the mass ratio of poly-dihydric alcohol and polyfunctionality polyether polyol is 1:2~1: 10, the addition of isocyanates is to ensure in polyols blend on the basis of hydroxyl reaction completely, preferred isocyanate group and hydroxyl The molar ratio of base is 2:1-4:1, the addition of plasticizer is the 3-8wt% of polyols blend dosage, and the addition of antifoaming agent is The 0.5-1wt% of polyols blend dosage, the addition of antioxidant are the 0.1-1wt% of polyols blend dosage, and ultraviolet light is inhaled The addition for receiving agent is the 0.1-1wt% of polyols blend dosage.
The molecular weight of the polypropylene glycerol aether is 1000-10000, and the molecular weight of polyoxypropylene pentaerythrite ether is 1000-10000。
The molecular weight of the polypropylene glycol is 1000-10000, and the molecular weight of polytetrahydrofuran diol is 1000-3000.
The isocyanates is toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate cyanogen Acid esters, how diisocyanate, benzene dimethylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate One or more of mixture.
The plasticizer is didecyl phthalate, dinonyl phthalate, diisopropyl sebacate, decanedioic acid two One or more of monooctyl ester mixture.
The antifoaming agent is organic silicon defoamer.
The antioxidant is four(β-(3,5- di-tert-butyl-hydroxy phenyls)Propionic acid)Pentaerythrite, bis- [β (tertiary fourths of 3- Base -5- methyl -4- hydroxy phenyls) propionic acid] triethyleneglycol ester, three(3,5- di-tert-butyl-hydroxy phenyls)Chlorinated isocyanurates, 2,6- One or more of di-tert-butyl-4-methy phenol mixture.
The ultra-violet absorber is ESCALOL 567 or 2- (2 '-hydroxyls -3 ', 5 '-two [ 1,1- 3,5-dimethylphenyl ])-benzotriazole.
Compared with prior art, the present invention has the following advantages:
The present invention can synthesize target product using one-step method, simple and direct efficient, simple for process;Polyol starting material used is cheap It is easy to get, at low cost, the amplification of easily operated process and realization industrialized production.Synthesis technology is environmentally protective, is arranged without " three wastes " It puts.Chain extender need not be added due to introducing chemically crosslinkable ingredient, in reaction and can guarantee the mechanical property after film forming. Since the introducing of chain extender can improve the viscosity of reaction system, be generally needed to be added diluent just can guarantee reaction it is normal into Row, and the present invention is without being added chain extender, it can be achieved that solvent-free reaction, environmentally protective.
Polyurethane water-proof paint good mechanical performance synthesized by the present invention, water-tolerant.Using polyetherdiol and polyethers Polyalcohol is raw material, and for polyether polyol since its degree of functionality is more than 2, late phase reaction can realize chemical crosslinking when forming a film, improve and hand over Join density, while introducing polyetherdiol, effectively adjusts the density of crosslinking points, while ensureing that there is high tensile strength, Assigning material has excellent elongation at break.Since polyols blend used is hydrophobic structure, entire reaction process institute Other hydrophilic radicals or segment are not introduced, synthesized polyurethane water-proof paint has excellent water resistance.
Polyurethane water-proof paint synthesized by the present invention is using water as curing agent, after the air set with certain humidity Fine and close polyurethane elastomer film can be formed, there is tight security.Due to introducing polyfunctionality active group, water is met Fine and close cross-linked network structure can be formed after solidification, and there is excellent mechanical property(Film tensile strength is more than 6MPa, and fracture is stretched Long rate is more than 1000%), a kind of excellent waterproof material is can be used as, is had a extensive future.
Specific implementation mode
It will be helpful to understand the present invention by following embodiments, but do not limit present disclosure.
Embodiment 1:
20g polypropylene glycols are added in reaction bulb(Mn=1000), 2g polypropylene glycerol aethers(Mn=10000), 120 DEG C Vacuum dehydration 2h is cooled to 50 DEG C, and toluene di-isocyanate(TDI) 7.1g, 50 DEG C of reaction 1h is added and is down to room temperature, addition catechol Formic acid didecyl 0.66g, silicon-type antifoaming agent 0.11g, four(β-(3,5- di-tert-butyl-hydroxy phenyls)Propionic acid)Ji Wusi Alcohol 0.022g, ESCALOL 567 0.022g.10min is stirred, discharging is sealed.
Embodiment 2:
20g polypropylene glycols are added in reaction bulb(Mn=10000), 10g polypropylene glycerol aethers(Mn=1000), 120 DEG C Vacuum dehydration 2h is cooled to 50 DEG C, and toluene di-isocyanate(TDI) 11.8g, 80 DEG C of reaction 4h are added, are down to room temperature, addition neighbour benzene two Phenol formic acid didecyl 2.4g, silicon-type antifoaming agent 0.3g, four(β-(3,5- di-tert-butyl-hydroxy phenyls)Propionic acid)Ji Wusi Alcohol 0.3g, ESCALOL 567 0.3g.10min is stirred, discharging is sealed.
Embodiment 3:
20g polypropylene glycols are added in reaction bulb(Mn=6000), 4g polypropylene glycerol aethers(Mn=6000), 120 DEG C true Sky dehydration 2h, is cooled to 60 DEG C, and toluene di-isocyanate(TDI) 2.3g, 60 DEG C of reaction 3h is added and is down to room temperature, addition catechol first Two nonyl ester 1.2g of acid, silicon-type antifoaming agent 0.16g, four(β-(3,5- di-tert-butyl-hydroxy phenyls)Propionic acid)Pentaerythrite 0.12g, ESCALOL 567 0.12g.10min is stirred, discharging is sealed.
Embodiment 4:
Addition 20g polytetrahydrofuran diols in reaction bulb are incorporated in reaction bulb(Mn=1000), 4g polyoxypropylene seasons Penta 4 alcohol ethers(Mn=1000), 120 DEG C of vacuum dehydration 2h are cooled to 60 DEG C, are added hexamethylene diisocyanate 14.1g, 50 DEG C 3h is reacted, is down to room temperature, is added two nonyl ester 1.2g of catechol formic acid, silicon-type antifoaming agent 0.16g, four(β-(Bis- uncles of 3,5- Butyl -4- hydroxy phenyls)Propionic acid)Pentaerythrite 0.12g, ESCALOL 567 0.12g.10min is stirred, is gone out Material, is sealed.
Embodiment 5:
It is incorporated in reaction bulb in reaction bulb and is incorporated in addition 20g polypropylene glycols in reaction bulb(Mn=1000), 4g is poly- Oxypropylene pentaerythrite ether(Mn=10000), 120 DEG C of vacuum dehydration 2h are cooled to 60 DEG C, hexamethylene diisocyanate are added 10.5g, 80 DEG C of reaction 4h, is down to room temperature, is added two nonyl ester 1.2g of catechol formic acid, silicon-type antifoaming agent 0.16g, and four (β-(3,5- di-tert-butyl-hydroxy phenyls)Propionic acid)Pentaerythrite 0.12g, ESCALOL 567 0.12g. 10min is stirred, discharging is sealed.
Embodiment 6:
20g polytetrahydrofuran diols are added in reaction bulb(Mn=3000), 4g polypropylene glycerol aethers(Mn=2000), 120 DEG C of vacuum dehydration 2h, are cooled to 60 DEG C, and hexamethylene diisocyanate 5.0g is added, 120 DEG C of vacuum dehydration 2h, 120 DEG C Vacuum dehydration 2h, is cooled to 60 DEG C, is added two nonyl ester 1.2g of catechol formic acid, silicon-type antifoaming agent 0.16g, and four(β-(3, 5- di-tert-butyl-hydroxy phenyls)Propionic acid)Pentaerythrite 0.12g, ESCALOL 567 0.12g.Stirring 10min, discharging, is sealed.
After film forming, the mechanical performance of film see the table below the made target product of above-described embodiment.
Sample Tensile strength MPa Elongation at break
Embodiment 1 6.5MPa 1450%
Embodiment 2 12.5MPa 740%
Embodiment 3 8.9MPa 2100%
Embodiment 4 6.8 MPa 1250%
Embodiment 5 7.2MPa 1520%
Embodiment 6 6.9 MPa 1230%

Claims (5)

1. a kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint, it is characterised in that preparation process is:In The polyols blend of polyfunctionality polyether polyol and poly-dihydric alcohol is added in reaction kettle, isocyanates, 50- are added after dehydration 80 DEG C of reaction 1-4h, are down to room temperature, plasticizer, antifoaming agent, antioxidant and the ultra-violet absorber being pre-dried are added, mix Obtained polyurethane water-proof paint after closing uniformly;
Wherein, polyfunctionality polyether polyol used is polyoxypropylene pentaerythrite ether, and poly-dihydric alcohol is polypropylene glycol or poly- four The mass ratio of hydrogen furans glycol, poly-dihydric alcohol and polyfunctionality polyether polyol is 2:1~10:1, the addition of isocyanates with Ensure that in polyols blend on the basis of hydroxyl reaction completely, the molar ratio of isocyanate groups and hydroxyl is 2:1-4:1, plasticizer Addition be polyols blend dosage 3-8wt%, the addition of antifoaming agent is the 0.5-1wt% of polyols blend dosage, is resisted The addition of oxidant is the 0.1-1wt% of polyols blend dosage, and the addition of ultra-violet absorber is polyols blend dosage 0.1-1wt%;
The molecular weight of the polyoxypropylene pentaerythrite ether is 1000-10000;The molecular weight of the polypropylene glycol is 1000- 10000, the molecular weight of polytetrahydrofuran diol is 1000-3000;
The isocyanates is naphthalene diisocyanate, benzene dimethylene diisocyanate, isophorone diisocyanate, six methylenes One or more of group diisocyanate mixture.
2. a kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint according to claim 1, special Sign is that the plasticizer is pungent for didecyl phthalate, dinonyl phthalate, diisopropyl sebacate, decanedioic acid two One or more of ester mixture.
3. a kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint according to claim 1, special Sign is that the antifoaming agent is organic silicon defoamer.
4. a kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint according to claim 1, special Sign is that the antioxidant is four(β-(3,5- di-tert-butyl-hydroxy phenyls)Propionic acid)Pentaerythrite, bis- [β (tertiary fourths of 3- Base -5- methyl -4- hydroxy phenyls) propionic acid] triethyleneglycol ester, three(3,5- di-tert-butyl-hydroxy phenyls)Chlorinated isocyanurates, 2,6- One or more of di-tert-butyl-4-methy phenol mixture.
5. a kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint according to claim 1, special Sign is that the ultra-violet absorber is ESCALOL 567 or 2- (2 '-hydroxyls -3 ', 5 '-two [ 1,1- diformazans Base phenyl ])-benzotriazole.
CN201510360424.3A 2015-06-26 2015-06-26 A kind of preparation method of environment-friendly type wet-solidifying single-component polyurethane water-repellent paint Expired - Fee Related CN105038564B (en)

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CN106147571A (en) * 2016-08-09 2016-11-23 深圳市永盛辉实业有限公司 A kind of aqueous elastic paint and preparation method thereof
CN108070067A (en) * 2016-11-15 2018-05-25 中国科学院青岛生物能源与过程研究所 A kind of preparation method of Cross-linkable coating antibacterial polyurethane
CN107603453A (en) * 2017-09-25 2018-01-19 中国石油天然气集团公司 A kind of polyurethane anticorrosive coating and preparation method thereof
CN108102058B (en) * 2018-01-11 2020-09-11 山东扬名新材料技术有限公司 Single-component solvent-free self-leveling polyurethane elastomer
CN108331279B (en) * 2018-02-05 2019-11-05 江苏苏博特新材料股份有限公司 A kind of construction method of the spray polyurea protection system for concrete base layer surface
CN111019078B (en) * 2019-12-31 2022-04-05 北京华腾新材料股份有限公司 Waterborne polyurethane curing agent and preparation method and application thereof
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