WO2022160584A1 - Revêtement de polyuréthane imperméable à l'eau, son procédé de préparation et son utilisation - Google Patents

Revêtement de polyuréthane imperméable à l'eau, son procédé de préparation et son utilisation Download PDF

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WO2022160584A1
WO2022160584A1 PCT/CN2021/102729 CN2021102729W WO2022160584A1 WO 2022160584 A1 WO2022160584 A1 WO 2022160584A1 CN 2021102729 W CN2021102729 W CN 2021102729W WO 2022160584 A1 WO2022160584 A1 WO 2022160584A1
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Prior art keywords
waterproof coating
polyurethane
isocyanate
polyurethane waterproof
reaction
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PCT/CN2021/102729
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English (en)
Chinese (zh)
Inventor
贺小钢
李忠人
周围
单永胜
马世界
王仁杰
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江苏凯伦建材股份有限公司
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Publication of WO2022160584A1 publication Critical patent/WO2022160584A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3271—Hydroxyamines
    • C08G18/3275—Hydroxyamines containing two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271

Definitions

  • the invention belongs to the field of building waterproofing, particularly relates to waterproofing construction for building base layers with high temperature and façades or slopes, in particular to a polyurethane waterproof coating and application thereof.
  • conventional polyurethane coatings are basically non-environmentally friendly coatings containing solvents.
  • the solvents in the coatings are volatile, which makes the environment smell bad and causes air pollution.
  • the viscosity of the polyurethane prepolymer itself is high, and the manufacturer must add fillers in order to reduce the cost, resulting in a further increase in the viscosity of the coating. If no solvent is added, it will be difficult to apply.
  • some large-scale projects in China such as the South-to-North Water Transfer Project, basement walls of large venues, high-speed railways, subways, tunnels, civil air defense, etc., need to be waterproofed on the facade or slope, which makes the construction inconvenient.
  • a seamless waterproof layer can be formed with a waterproofing paint, but the general purpose paint will run off when applied to a facade or slope, resulting in a thin upper part and a thick lower part. The thickness of the upper part cannot be hung, and the thickness of the coating film surface is uneven. If you want to apply a 1.5mm thick coating film, you may need to apply it four or five times. In addition, the temperature in most areas of the country in summer is generally high, and the grassroots on site can even reach above 50 °C after exposure to the sun. At this time, ordinary anti-sag polyurethane coatings are prone to flow after the facade is applied, and it needs to be repeatedly painted manually. And it takes a long time to reach the required thickness after each brushing, which is not only time-consuming and labor-intensive, but also a great waste of paint.
  • the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and to provide a polyurethane waterproof coating suitable for spraying on high-temperature base layers and taking into account sag resistance and viscosity balance, especially suitable for machinery. Spraying, basically one spraying can meet the requirements.
  • the present invention also provides a preparation method of the above-mentioned polyurethane waterproof coating.
  • the present invention also provides the use of the above-mentioned polyurethane waterproof coating for spraying construction on the base layer with a temperature of over 50°C, and the construction on the high-temperature base layer, especially on the high-temperature base layer on the facade or slope surface, also has excellent sag resistance.
  • a polyurethane waterproof coating comprises a polyurethane prepolymer and an auxiliary, the raw materials of the polyurethane prepolymer include polyol, isocyanate and secondary amine compound, and the secondary amine compound is selected from formula (I) Combinations of one or more of the compounds shown:
  • R 1 is branched alkylene
  • R 2 is H or C 1-10 alkyl, or C 1-10 alkyl or phenyl substituted by one or more selected from C 1-6 alkyl, C 1-6 alkoxy;
  • the polyurethane prepolymer is prepared by mixing and reacting polyol, secondary amine compound and part of isocyanate, and then adding the remaining isocyanate to react again.
  • R 1 is C 3-10 branched chain alkylene, and R 1 can be -C(CH 3 ) 2 -, -C(CH 2 CH 3 ) 2 -, -C(CH 2 CH 2 CH 3 ) 2 -, -CH(CH 3 )-, -CH(CH 2 CH 3 )-, -C ⁇ CH(CH 3 ) 2 ⁇ 2 -, -C ⁇ CH(CH 2 CH 3 ) 2 ⁇ 2 -, -C ⁇ CH 2 CH(CH 3 ) 2 ⁇ 2 -, -C ⁇ CH 2 CH(CH 3 ) 2 ⁇ 2 - and so on.
  • R 2 is H, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, methoxymethyl, methoxyethyl, methoxy methoxypropyl, methoxyisopropyl, methoxybutyl, methoxyisobutyl, methoxypentyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, ethoxy isopropyl, ethoxybutyl, ethoxyisobutyl, ethoxypentyl, methylphenyl, ethylphenyl, methoxyphenyl, ethoxyphenyl or phenyl.
  • the secondary amine compound is a combination of one or more selected from the compounds represented by the following formula:
  • the mass ratio of the polyol, the isocyanate and the compound represented by the formula (I) is 1:0.2-0.5:0.05-0.15.
  • the polyol is composed of a diol and a triol, and the mass ratio of the diol to the triol is 1:0.1-1.
  • it can be polyether 330N, polyether 4000, polyether 2000, polyether 3050, polyether 1000, and polyether 400 produced by Shandong Dongda Chemical Industry Co., Ltd.
  • the isocyanate is a polyisocyanate.
  • the polyisocyanate is selected from toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, modified diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate A combination of at least two of isocyanate and hexamethylene diisocyanate.
  • it can be selected from the MDI-MI diphenylmethane diisocyanate produced by BASF in Germany, MDI50 of Wanhua Chemical, MDI100 of Wanhua Chemical, IPDI of Wanhua Chemical, HDI of Wanhua Chemical, BASF's Modified MDI 103C, at least two of the toluene diisocyanates with the brand name of TDI-80 from Bayer, Germany.
  • the temperature of the mixing reaction of the polyol, the secondary amine compound and the partial isocyanate is less than or equal to 60°C.
  • the reaction temperature after adding the remaining isocyanate is 75-85°C.
  • the temperature control during the synthesis of the polyurethane prepolymer is beneficial to control the degree of reaction to form the expected molecular structure, to ensure the balance between sag resistance and viscosity at high temperature, and at the same time, it is beneficial to spray construction.
  • the auxiliary agent comprises a catalyst
  • the catalyst is composed of dibutyltin dilaurate, pentamethyldipropylenetriamine and isopropylamine with a mass ratio of 1:0.4-0.8:0.2-0.6.
  • Zinc octoate composition is composed of dibutyltin dilaurate, pentamethyldipropylenetriamine and isopropylamine with a mass ratio of 1:0.4-0.8:0.2-0.6.
  • the adjuvant further includes filler, plasticizer, dispersant, reactive diluent, solvent, thixotropic agent, dewatering agent and defoaming agent; in parts by mass, In the polyurethane waterproof coating, 20-50 parts of polyurethane prepolymer, 20-50 parts of filler, 5-30 parts of plasticizer, 0.1-1 part of dispersant, 0.3-2 parts of reactive diluent, and 0.5-15 parts of solvent , 0.1-2 parts of thixotropic agent, 0.1-1 part of water removing agent, 0.05-1 part of catalyst and 0.1-1 part of defoamer.
  • the fillers include heavy fillers and/or nanoscale fillers.
  • the heavy filler is one or more combinations selected from titanium dioxide, heavy calcium carbonate, kaolin, and talc.
  • the nano-scale filler is a combination of one or more selected from gypsum whiskers, fumed silica, nano-calcium carbonate, nano-aluminum nitride, nano-boron nitride and nano-aluminum borate.
  • the defoamers include physical defoamers and/or chemical defoamers. Described physical defoamer is selected from polysiloxane defoamer and/or silicone defoamer, and described chemical defoamer is one selected from calcium oxide, magnesium oxide, calcium hydroxide and latent curing agent. one or more combinations.
  • the defoamer can be the defoamer with the brand name of 066N produced by BYK Chemical, the defoamer 5500 from Deqian Chemical, and the silicone defoamer from Shanghai Tiger.
  • the plasticizers include, but are not limited to, diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), chlorinated paraffins, dioctyl adipate Fat, glycol benzoate, trioctyl phosphate, phenyl alkyl sulfonate.
  • DINP Chonese name: diisononyl phthalate
  • DIDP chlorinated paraffin from Danyang Auxiliary Factory
  • vegetable oil from Eaglet dioctyl adipate
  • benzoic acid Optional one or more of glycol ester, trioctyl phosphate and phenyl alkyl sulfonate.
  • the dispersant is a combination of one or more selected from the group consisting of titanate-based dispersants, silane-based dispersants, and carboxylic acid-based dispersants.
  • the dispersing agent may be silane coupling agent WD50 from Hubei Wuda Silicone Company, Hangzhou Lin'an Auxiliary F108 dispersing agent, silane coupling agent KH550, silane coupling agent KH560, Deqian Chemical 9250 dispersing agent, and the like.
  • the reactive diluent is the zoldine RD20 reactive diluent from angus company in the United States.
  • the solvent is No. 230 mineral spirits.
  • the thixotropic agent is fumed silica, Arkema's polyresin wax powder LST.
  • the water scavenger is a molecular sieve and/or an isocyanate water scavenger.
  • it can be p-toluenesulfonyl isocyanate small-molecule water-removing agent from BASF in Germany, Luoyang Jianlong micro-nano molecular sieve.
  • Another technical solution provided by the present invention a use of the above-mentioned polyurethane waterproof coating for spraying construction on a base layer with a temperature of more than 50°C, and the base layer is inclined and/or vertical.
  • the compound represented by the formula (I) in the present invention is prepared by amine methylation of a compound containing an active ⁇ -H phenol, an aldehyde compound and a double-ended primary amine.
  • the compound preferably contains a branched alkylene group; the aldehyde compounds are some common aldehydes, including but not limited to formaldehyde, acetaldehyde, benzaldehyde, and the like.
  • the preparation method of the compound represented by formula (I) of the present invention comprises the following steps:
  • step (b) adding the compound of the double-ended primary amine to be reacted (H 2 NR 1 -NH 2 , R 1 is the same as before) to the reaction solution after the reaction in step (a), mixing, heating up to react, and then vacuum dehydration and/or The temperature is increased for dehydration, and the moisture content is controlled below 500 ppm until a transparent viscous liquid product is obtained, and the compound represented by the formula (I) is prepared.
  • the molar ratio of phenol, aldehyde compound and double-ended primary amine compound is 1:0.5-2:0.5-1.
  • the reaction temperature of the phenol and the aldehyde compound is 50-80°C.
  • step (a) the reaction of the phenol and the aldehyde compound is carried out in the presence of an alkaline earth metal magnesium type catalyst.
  • the alkaline earth metal magnesium type catalyst is composed of magnesium hydroxide and magnesium oxide with a molar ratio of 1:0.8-1.2.
  • the reaction temperature after adding the compound of double-ended primary amine is 100-150°C.
  • a preparation method of the above-mentioned polyurethane waterproof coating comprises the following steps:
  • step (2) Mixing the polyurethane prepolymer prepared in step (1) with an auxiliary agent to prepare the polyurethane waterproof coating.
  • adding isocyanate in batches is mainly to ensure that the molecular structure crosslinking density in the early stage is large enough to form polyurea grafting, and provide necessary molecular structure conditions for the thixotropy of the system.
  • step (1) before the first-stage reaction, vacuum dehydration is performed on the polyol and the secondary amine compound, and the moisture content is controlled to be less than 0.05%.
  • step (1) since the first-stage reaction is an exothermic reaction, the first-stage reaction is controlled to stop after the reaction temperature no longer rises and the temperature is stable.
  • the protective gas may be nitrogen gas, argon gas, or the like.
  • step (1) the mass content of NCO in the produced polyurethane prepolymer is controlled to be 2-6%.
  • step (1) in the first-stage reaction, in the first-stage reaction, part of the isocyanates added accounts for 20-50% of the total isocyanates, preferably 20-40%.
  • the auxiliary agent further comprises filler, plasticizer, dispersant, reactive diluent, solvent, thixotropic agent, catalyst, dewatering agent and defoaming agent; wherein The fillers and plasticizers are all dehydrated before being added.
  • step (2) among the auxiliary agents, the plasticizer and the filler are added after the remaining auxiliary agents.
  • step (2) after mixing the polyurethane prepolymer prepared in step (1) with the auxiliary agent, a vacuum defoaming treatment is also performed, and the vacuum defoaming treatment has a vacuum degree of - Carry out under 0.09 ⁇ 0.1MPa.
  • the present invention has the following advantages compared with the prior art:
  • the polyurethane waterproof coating of the present invention innovatively uses a specific secondary amine compound to prepare a polyurethane prepolymer, and the polyurethane prepolymer made from the secondary amine compound has an ideal molecular structure, and itself can have better contact Variable performance (on the one hand, these specific secondary amine-based compounds have a large steric hindrance effect, which can make the reaction mild, and the formed molecular structure is regular and compact; effect, provide more thixotropic contact points, and provide better thixotropy for the system), which can endow waterproof coatings with excellent sag resistance and suitable viscosity, especially for high-temperature base layers, which can still be used with their
  • the special structure achieves both sag resistance and viscosity on the high-temperature base, so that the polyurethane waterproof coating of the present invention can be sprayed by machine, especially sprayed on facades or slopes, which overcomes the problems in summer, etc.
  • This example provides a secondary amine compound of formula (I-1):
  • step (b) adding isopropylene diamine to be reacted (H 2 NC(CH 3 ) 2 -NH 2 , 0.5mol) to the reaction solution after step (a), mixing, heating to 120° C., reacting for 4 hours, and then Vacuum dehydration, control the moisture content below 500ppm, until a transparent viscous liquid product is obtained, and the compound represented by the formula (I-1) is prepared.
  • This example provides a secondary amine compound of formula (I-2):
  • step (b) 3-diaminopentane (H 2 NC(CH 2 CH 3 ) 2 -NH 2 , 0.5 mol) to be reacted was added to the reaction solution after the reaction in step (a), mixed, heated to 120° C., The reaction was carried out for 4 hours, followed by vacuum dehydration, and the moisture content was controlled below 500 ppm until a transparent viscous liquid product was obtained, and the compound represented by the formula (I-2) was prepared.
  • This example provides a secondary amine compound of formula (I-5):
  • step (b) adding isopropylene diamine to be reacted (H 2 NC(CH 3 ) 2 -NH 2 , 0.5mol) to the reaction solution after step (a), mixing, heating to 120° C., reacting for 4 hours, and then Vacuum dehydration is carried out, and the moisture content is controlled below 500 ppm until a transparent viscous liquid product is obtained, and the compound represented by the formula (I-5) is prepared.
  • This example provides a polyurethane waterproof coating, the raw materials of which include: 420kg of polyurethane prepolymer, 250kg of filler, 100kg of plasticizer, 1kg of dispersant, 20kg of reactive diluent, 100kg of solvent, 5kg of thixotropic agent, 1kg of dewatering agent, catalyst 1kg and defoamer 3kg.
  • the raw materials of the polyurethane prepolymer include: 150 kg of Dongda polyether triol 330N, 150 kg of Dongda polyether diol 2000, 20 kg of the secondary amine compound of Example 1, 50 kg of BASF MDI-MI and 50 kg of BASF modified MDI103c.
  • the filler is composed of 150kg Suzhou Rieter ultra-fine LD600 and 100kg Hunan Jinjian B-type nano powder;
  • the plasticizer is 100kg DINP produced by Taiwan Liancheng;
  • the dispersant is 1kg of silane coupling agent WD50 from Hubei Wuhan University Silicone Company;
  • the active diluent is 20kg of zoldine RD20 active diluent from angus company in the United States;
  • the solvent is 100kg No. 230 solvent oil
  • Thixotropic agent is 5kg Deshan PM20L fumed silica
  • the water scavenger is 1kg of p-toluenesulfonyl isocyanate small molecule water scavenger from BASF, Germany;
  • the catalyst is composed of 0.5kg of dibutyltin dilaurate from Beijing Akma, 0.3kg of pentamethyldipropylene triamine from American Air Chemicals, and 0.2kg of zinc isooctanoate from American leading chemicals;
  • the defoamer is composed of 0.5kg of magnesium oxide from Wuxi Zehui Chemical, 0.5kg of calcium oxide from Jiangsu Qunxin, and 2kg of BYK 066N defoamer.
  • the preparation method of polyurethane waterproof coating comprises the following steps:
  • the measured properties are as follows: viscosity 11200mpa.s (25°C), 5800mpa.s (50°C), solid content 88.9%, surface dry time 2 hours, solid dry time 6 hours, 7 days tensile strength 4.2MPa, elongation at break 874%, tear strength 23N/mm;
  • Example 4 It is basically the same as Example 4, except that the secondary amine compound is replaced by 22 kg of the compound prepared in Example 2.
  • the measured properties are as follows: viscosity 12100mpa.s (25°C), 6100mpa.s (50°C), solid content 88.8%, surface dry time 2 hours, solid dry time 5 hours, 7 days tensile strength 3.9MPa, elongation at break 976%, tear strength 22N/mm;
  • Example 4 It is basically the same as Example 4, except that the secondary amine compound is replaced by 30.8 kg of the compound prepared in Example 3.
  • the measured properties are as follows: viscosity 13200mpa.s (25°C), 7100mpa.s (50°C), solid content 89%, surface dry time 2 hours, solid dry time 7 hours, 7 days tensile strength 3.8MPa, elongation at break 750%, tear strength 16N/mm;
  • Example 4 Basically the same as Example 4, the difference is only that: in the preparation process of the polyurethane prepolymer, 15kg BASF MDI-MI and 15kg BASF modified MDI103c were added to carry out the first-stage reaction, and then 35kg BASF MDI-MI and 35kg BASF were added. BASF modified MDI103c for the second stage reaction.
  • the measured properties are as follows: viscosity 22000mpa.s (25°C), 12100mpa.s (50°C), solid content 88.9%, surface dry time 2 hours, solid dry time 6 hours, 7 days tensile strength 3.1MPa, elongation at break 678%, tear strength 18N/mm;
  • Example 4 Basically the same as Example 4, the difference is only that: the secondary amine compound of Example 1 is replaced by the commercially available chain extender clearlink 1000 4,4'-bis-sec-butylaminodicyclohexylmethane.
  • the measured properties are as follows: viscosity 35000mpa.s (25°C), 21900mpa.s (50°C), solid content 88.8%, surface dry time 2 hours, solid dry time 6 hours, 7 days tensile strength 1.1MPa, elongation at break 546%, tear strength 15N/mm; 50°C base surface after mechanical spraying construction is as follows: a thick coating of 1mm flows.
  • Example 4 It is basically the same as Example 4, except that the secondary amine compound in Example 1 is replaced with a commercially available chain extender, methylenebis-o-chloroaniline (moca).
  • a commercially available chain extender methylenebis-o-chloroaniline (moca).
  • the measured properties are as follows: viscosity 45370mpa.s (25°C), 28900mpa.s (50°C), solid content 88.9%, surface dry time 2 hours, solid dry time 6 hours, 7 days tensile strength 1.8MPa, elongation at break 457%, tear strength 13N/mm;
  • Example 4 It is basically the same as Example 4, except that the polyurethane prepolymer is prepared by mixing the polyol, the secondary amine compound of Example 1 and all the isocyanates and reacting together at 80 ⁇ 2°C.
  • the measured properties are as follows: viscosity 34600mpa.s (25°C), 17600mpa.s (50°C), solid content 89%, surface dry time 2 hours, solid dry time 6 hours, 7 days tensile strength 2.3MPa, elongation at break 478%, tear strength 15N/mm;
  • Example 4 Basically the same as Example 4, the only difference is that the polyurethane prepolymer is prepared by reacting polyol and all isocyanates at 80 ⁇ 2° C. for 2 hours, and then reacting with the secondary amine compound of Example 1 for 1 hour.
  • the measured properties are as follows: viscosity 44900mpa.s (25°C), 22300mpa.s (50°C), solid content 89%, surface dry time 2 hours, solid dry time 6 hours, 7 days tensile strength 2.1MPa, elongation at break 786%, tear strength 16N/mm;

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Paints Or Removers (AREA)

Abstract

Sont divulgués un revêtement de polyuréthane imperméable à l'eau, son procédé de préparation et son utilisation. Le revêtement de polyuréthane imperméable à l'eau comprend un prépolymère de polyuréthane et un agent auxiliaire, la matière première du prépolymère de polyuréthane comprenant un polyol, un isocyanate et un composé amine secondaire, le composé amine secondaire étant choisi parmi l'un ou une combinaison de plusieurs des composés représentés par la formule (I) : dans laquelle R1 représente un alkylène à chaîne ramifiée, R2 représente H ou un groupe alkyle en C1-10, ou un alkyle en C1-10 substitué par un ou plusieurs parmi un alkyle en C1-6 et un alcoxy en C1-6, ou un phényle ; le prépolymère de polyuréthane est préparé en mélangeant le polyol, le composé amine secondaire et une partie de l'isocyanate pour une réaction, et en ajoutant ensuite le reste de l'isocyanate pour une autre réaction ; et le revêtement imperméable à l'eau selon la présente invention est approprié pour une pulvérisation par machine sur une couche de base à haute température, peut combiner la résistance à l'affaissement et l'équilibre de viscosité, et est particulièrement approprié pour une construction par pulvérisation sur une couche de base avec une température supérieure ou égale à 50 °C.
PCT/CN2021/102729 2021-01-26 2021-06-28 Revêtement de polyuréthane imperméable à l'eau, son procédé de préparation et son utilisation WO2022160584A1 (fr)

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CN202110104253.3A CN112898889B (zh) 2021-01-26 2021-01-26 一种聚氨酯防水涂料及其应用
CN202110104253.3 2021-01-26

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CN116042072A (zh) * 2023-01-13 2023-05-02 上海固密特新材料科技有限公司 一种柔性耐候环氧涂料及其应用

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112898889B (zh) * 2021-01-26 2022-04-01 江苏凯伦建材股份有限公司 一种聚氨酯防水涂料及其应用
CN117363086A (zh) * 2021-08-06 2024-01-09 江苏凯伦建材股份有限公司 一种聚酰胺蜡组合物在制备聚氨酯防水涂料中的应用

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