CN111057461B - Preparation method of single-component water-curing polyurethane waterproof coating - Google Patents
Preparation method of single-component water-curing polyurethane waterproof coating Download PDFInfo
- Publication number
- CN111057461B CN111057461B CN201911341806.6A CN201911341806A CN111057461B CN 111057461 B CN111057461 B CN 111057461B CN 201911341806 A CN201911341806 A CN 201911341806A CN 111057461 B CN111057461 B CN 111057461B
- Authority
- CN
- China
- Prior art keywords
- parts
- waterproof coating
- polyurethane waterproof
- polyether
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- C08G18/40—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
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention provides a preparation method of a single-component water-cured polyurethane waterproof coating, which comprises the steps of drying, mixing, pre-polymerizing, chain extending and film forming, wherein in the preparation process, the addition amount, the reaction temperature and the reaction time of diphenylmethane diisocyanate in the process of synthesizing a prepolymer are reasonably controlled by the specific proportion of polyether diol and polyether triol and adding a certain amount of benzamide, and the use of a chain extender, a seasoning and the like is combined, so that the finally prepared single-component water-cured polyurethane waterproof coating has higher tensile strength and higher elongation at break, has excellent heat resistance, water resistance and aging resistance, is convenient to construct, has lower cost and is free of environmental pollution, and is suitable for large-scale popularization and use.
Description
Technical Field
The invention belongs to the field of polyurethane waterproof coatings, and particularly relates to a preparation method of a single-component water-cured polyurethane waterproof coating.
Background
Since Bayer adopts 1, 4-butanediol and hexamethylene diisocyanate to synthesize polyurethane for the first time in Otto.Bayer, 1937, polyurethane has excellent chemical properties and mechanical and physical properties, and is widely researched and paid attention to in the field of chemical industry. Polyurethane waterproof coatings have become one of the fastest growing varieties of the global coating industry in the last decade due to their excellent product properties and processing diversity.
In the aspect of application of the single-component polyurethane waterproof coating, the polyurethane coating produced in China is mostly polyisocyanate Toluene Diisocyanate (TDI), the TDI has strong irritation, high toxicity and carcinogenicity, and the treatment cost of the waste TDI is high. Therefore, the diphenylmethane diisocyanate (MDI) is gradually developed and replaced to become a main raw material for manufacturing the polyurethane elastomer, and the diphenylmethane diisocyanate (MDI) is applied to the preparation of the single-component polyurethane waterproof coating, so that the product cost is reduced, and more importantly, the production and use process is safer and more environment-friendly.
CN103540254B provides a preparation method of a single-component water-curing polyurethane waterproof paint, which comprises the following raw material components of 120 parts of polyether diol, 70 parts of polyether triol, 350 parts of plasticizer diisobutyl phthalate (DIBP) and 26 parts of toluene diisocyanate TDI, wherein the strength of the waterproof paint can be improved to 2.6MPa and the elongation at break can be improved to 721 by using the raw material TDI.
CN104745064B provides an environment-friendly one-component polyurethane waterproof paint, the raw materials of which include modified liquefied MDI, polyether polyol, catalyst triethylenediamine, etc., and the elongation at break of the polyurethane waterproof paint can be increased to 700% by using urethane-modified liquefied MDI and carbodiimide-uretonimine-modified liquefied MDI, but the tensile strength is only 2.47 MPa.
Disclosure of Invention
In order to solve the problems in the prior art and further optimize the prior art, the invention provides a preparation method of a single-component water-cured polyurethane waterproof coating, which aims to realize the following purposes:
1. increase tensile strength
2. Increase of elongation at break
3. Shorten the curing time
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of a single-component water-cured polyurethane waterproof coating is characterized by comprising the steps of drying, mixing, pre-polymerizing, chain extending and film forming;
drying, wherein the water content of the polyether diol and the polyether triol is controlled to be 0-0.2%;
mixing, wherein the mass ratio of the polyether diol to the polyether triol is 7-9: 1;
preferably, the mass ratio of the polyether diol to the polyether triol is 15: 2;
benzoyl chloride is also added during the mixing, and the addition amount of the benzoyl chloride is 0.09-0.12% of the total weight of the polyether diol and the polyether triol;
preferably, the addition amount of benzoyl chloride is 0.1% of the total weight of polyether diol and polyether triol;
pre-polymerizing, introducing nitrogen for 20 minutes at normal pressure, removing air in a reaction kettle, adding MDI under the protection of nitrogen atmosphere, raising the temperature to 78-82 ℃ and carrying out pre-polymerization for 3-4 hours to obtain a prepolymer;
the adding amount of MDI is controlled to be 5-5.5wt% of-NCO group content in the reaction liquid;
preferably, the content of-NCO groups in the reaction liquid is 5.5% by weight;
preferably, the reaction temperature is 80 ℃, and the reaction time is 4 h;
chain extension, adding a plasticizer, uniformly stirring at a high speed, raising the reaction temperature to 48-55 ℃, adding dihydric alcohol, and continuously stirring for 1-1.5 hours;
preferably, the reaction temperature is 50 ℃, and after the dihydric alcohol is added, the mixture is stirred and reacted for 1 hour;
the plasticizer is anhydrous chlorinated paraffin, dibutyl phthalate, phenyl alkyl sulfonate or polyethylene glycol PEG 400;
the dihydric alcohol is ethylene glycol, propylene glycol or butanediol;
the polyurethane waterproof coating product prepared by film forming comprises the following raw materials in parts by weight:
15-37 parts of prepolymer, 20-26 parts of plasticizer, 2-4 parts of dihydric alcohol, 20-30 parts of flame retardant, 20-25 parts of filler, 0.2-0.4 part of catalyst, 0.1-0.3 part of defoamer and 0.1-0.3 part of pigment
Preferably, 36.5 parts of prepolymer, 20 parts of plasticizer, 3 parts of dihydric alcohol, 20 parts of flame retardant, 20 parts of filler, 0.3 part of catalyst, 0.1 part of defoaming agent and 0.1 part of pigment;
the catalyst is dibutyltin dilaurate;
the filler comprises talcum powder, kaolin, light calcium carbonate and light calcium oxide, wherein the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the light calcium oxide is 1-3:1:1-2.5: 1-3;
preferably, the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the light calcium oxide is 2:1:2: 2;
the flame retardant is phosphate flame retardant;
preferably, dimethyl methylphosphonate DMMP;
the pigment is carbon black;
the defoaming agent is polyoxyethylene polyoxypropylene amine ether or polyoxyethylene polyoxypropylene pentaerythritol ether;
by adopting the technical scheme, the invention has the beneficial effects that:
1. according to the preparation method of the single-component water-curing polyurethane waterproof coating, the mechanical property of the coating is excellent, according to the test standard of GB/T16777, the tensile strength is 3.0-3.6MPa, the elongation at break reaches 755%, and the tear strength reaches 20-24N/mm;
2. according to the preparation method of the single-component water-cured polyurethane waterproof coating, the coating curing time is short, the surface drying time of the coating is 4-6 hours, and the actual drying time is 15-18 hours;
3. according to the preparation method of the single-component water-curing polyurethane waterproof coating, the waterproof coating has the heat conductivity coefficient of 0.0141-0.0185W/M.K, low heat conductivity coefficient and good heat preservation effect according to the test standard of GB/T3399;
4. according to the preparation method of the single-component water-curing polyurethane waterproof coating, the bonding strength of a wet base surface reaches 1.25-1.30MPa according to the test standard of GB/T19250;
5. the preparation method of the single-component water-curing polyurethane waterproof coating has good water resistance, the water seepage phenomenon is not generated when the pressure is kept for 30min at 0.4MPa according to the test standard of GB/T16777, and the water absorption rate is lower than 1%;
6. the preparation method of the single-component water-curing polyurethane waterproof coating has excellent aging resistance, and according to the salt spray test standard of GB/T1763, the phenomena of foaming, wrinkling and peeling do not occur after 3% salt spray aging for 2000h, so that the use requirement is met, and the single-component water-curing polyurethane waterproof coating has good stability;
7. the preparation method of the single-component water-curing polyurethane waterproof coating has the advantages of convenience in construction, low cost, no environmental pollution and suitability for large-scale popularization and application.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific examples.
Example 1 preparation method of one-component water-curable polyurethane waterproof coating
The preparation method of the single-component water-curing polyurethane waterproof coating comprises the following steps:
1. drying
Respectively carrying out vacuum dehydration treatment on polyether dihydric alcohol and polyether trihydric alcohol until the water content is 0.11%;
2. mixing
Mixing polyether diol and polyether triol according to the mass ratio of 15:2, stirring, and adding benzoyl chloride into a reaction kettle;
the addition amount of the benzoyl chloride is 0.1 percent of the total weight of the polyether diol and the polyether triol;
3. pre-polymerization
Introducing nitrogen for 20 minutes at normal pressure, removing air in the reaction kettle, adding MDI under the protection of nitrogen atmosphere, raising the temperature to 80 ℃ and carrying out prepolymerization reaction for 4 hours to obtain a prepolymer;
the adding amount of MDI is controlled to be 5.5wt% of-NCO group content in the reaction liquid;
4. chain extension
Adding 20 parts of plasticizer in total mass into the prepolymer, uniformly stirring at high speed, raising the reaction temperature to 50 ℃, adding 3 parts of dihydric alcohol, and continuing stirring for 1 hour;
the plasticizer is anhydrous chlorinated paraffin;
the dihydric alcohol is ethylene glycol;
5. film formation
Adding a flame retardant, a filler, a catalyst, a defoaming agent and a pigment into the polyurethane waterproof coating, and uniformly mixing to obtain a polyurethane waterproof coating product;
the polyurethane waterproof coating comprises the following raw materials in parts by weight:
36.5 parts of prepolymer, 20 parts of plasticizer, 3 parts of dihydric alcohol, 20 parts of flame retardant, 20 parts of filler, 0.3 part of catalyst, 0.1 part of defoaming agent and 0.1 part of pigment;
the flame retardant is dimethyl methyl phosphate DMMP;
the filler comprises talcum powder, kaolin, light calcium carbonate and light calcium oxide, and the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the light calcium oxide is 2:1:2: 2;
the pigment is carbon black;
the catalyst is dibutyltin dilaurate;
the defoaming agent is polyoxyethylene polyoxypropylene ether.
Example 2 preparation method of single-component water-curable polyurethane waterproof coating
The preparation method of the single-component water-curing polyurethane waterproof coating comprises the following steps:
1. drying
Respectively carrying out vacuum dehydration treatment on polyether dihydric alcohol and polyether trihydric alcohol until the water content is 0.2%;
2. mixing
Mixing polyether diol and polyether triol according to the mass ratio of 7:1, stirring, and adding benzoyl chloride into a reaction kettle;
the addition amount of the benzoyl chloride is 0.09 percent of the total weight of the polyether diol and the polyether triol;
3. pre-polymerization
Introducing nitrogen for 20 minutes at normal pressure, removing air in the reaction kettle, adding MDI under the protection of nitrogen atmosphere, raising the temperature to 78 ℃ and carrying out prepolymerization reaction for 3 hours to obtain a prepolymer;
the adding amount of MDI is controlled to be 5.0wt% of-NCO group content in the reaction liquid;
4. chain extension
Adding 25 parts of plasticizer in total mass into the prepolymer, uniformly stirring at high speed, raising the reaction temperature to 48 ℃, adding 2 parts of dihydric alcohol, and continuing stirring for 1.5 hours;
the plasticizer is dibutyl phthalate;
the dihydric alcohol is propylene glycol;
5. film formation
Adding a flame retardant, a filler, a catalyst, a defoaming agent and a pigment into the polyurethane waterproof coating, and uniformly mixing to obtain a polyurethane waterproof coating product;
the polyurethane waterproof coating comprises the following raw materials in parts by weight:
24.4 parts of prepolymer, 25 parts of plasticizer, 2 parts of dihydric alcohol, 25 parts of flame retardant, 23 parts of filler, 0.3 part of catalyst, 0.2 part of defoaming agent and 0.1 part of pigment;
the flame retardant is dimethyl methyl phosphate DMMP;
the filler comprises talcum powder, kaolin, light calcium carbonate and light calcium oxide, and the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the light calcium oxide is 1:1:2: 3;
the pigment is carbon black;
the catalyst is dibutyltin dilaurate;
the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.
Example 3 preparation method of one-component water-curable polyurethane waterproof coating
The preparation method of the single-component water-curing polyurethane waterproof coating comprises the following steps:
1. drying
Respectively carrying out vacuum dehydration treatment on polyether dihydric alcohol and polyether trihydric alcohol until the water content is 0.08%;
2. mixing
Mixing polyether diol and polyether triol according to the mass ratio of 8:1, stirring, and adding benzoyl chloride into a reaction kettle;
the addition amount of the benzoyl chloride is 0.1 percent of the total weight of the polyether diol and the polyether triol;
3. pre-polymerization
Introducing nitrogen for 20 minutes at normal pressure, removing air in the reaction kettle, adding MDI under the protection of nitrogen atmosphere, raising the temperature to 82 ℃ and carrying out prepolymerization reaction for 4 hours to obtain a prepolymer;
the adding amount of MDI is controlled to be 5.2wt% of-NCO group content in the reaction liquid;
4. chain extension
Adding a plasticizer accounting for 26 parts of the total mass into the prepolymer, uniformly stirring at a high speed, raising the reaction temperature to 52 ℃, adding 4 parts of dihydric alcohol, and continuing stirring for 1 hour;
the plasticizer is alkyl phenyl sulfonate;
the dihydric alcohol is ethylene glycol;
5. film formation
Adding a flame retardant, a filler, a catalyst, a defoaming agent and a pigment into the polyurethane waterproof coating, and uniformly mixing to obtain a polyurethane waterproof coating product;
the polyurethane waterproof coating comprises the following raw materials in parts by weight:
20.3 parts of prepolymer, 26 parts of plasticizer, 4 parts of dihydric alcohol, 24 parts of flame retardant, 25 parts of filler, 0.2 part of catalyst, 0.2 part of defoaming agent and 0.3 part of pigment;
the flame retardant is dimethyl methyl phosphate DMMP;
the filler comprises talcum powder, kaolin, light calcium carbonate and light calcium oxide, and the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the light calcium oxide is 2:1:2.5: 3;
the pigment is carbon black;
the catalyst is dibutyltin dilaurate;
the defoaming agent is polyoxyethylene polyoxypropylene ether.
Example 4 preparation method of one-component water-curable polyurethane waterproof coating
The preparation method of the single-component water-curing polyurethane waterproof coating comprises the following steps:
1. drying
Respectively carrying out vacuum dehydration treatment on polyether dihydric alcohol and polyether trihydric alcohol until the water content is 0.16%;
2. mixing
Mixing polyether diol and polyether triol according to the mass ratio of 9:1, stirring, and adding benzoyl chloride into a reaction kettle;
the addition amount of the benzoyl chloride is 0.12 percent of the total weight of the polyether diol and the polyether triol;
3. pre-polymerization
Introducing nitrogen for 20 minutes at normal pressure, removing air in the reaction kettle, adding MDI under the protection of nitrogen atmosphere, raising the temperature to 82 ℃ and carrying out prepolymerization reaction for 4 hours to obtain a prepolymer;
the adding amount of MDI is controlled to be 5.4wt% of-NCO group content in the reaction liquid;
4. chain extension
Adding 25 parts of plasticizer in total mass into the prepolymer, uniformly stirring at high speed, raising the reaction temperature to 55 ℃, adding 3 parts of dihydric alcohol, and continuing stirring for 1 hour;
the plasticizer is polyethylene glycol PEG 400;
the dihydric alcohol is ethylene glycol;
5. film formation
Adding a flame retardant, a filler, a catalyst, a defoaming agent and a pigment into the polyurethane waterproof coating, and uniformly mixing to obtain a polyurethane waterproof coating product;
the polyurethane waterproof coating comprises the following raw materials in parts by weight:
18 parts of prepolymer, 25 parts of plasticizer, 3 parts of dihydric alcohol, 30 parts of flame retardant, 23 parts of filler, 0.4 part of catalyst, 0.3 part of defoaming agent and 0.3 part of pigment;
the flame retardant is dimethyl methyl phosphate DMMP;
the filler comprises talcum powder, kaolin, light calcium carbonate and light calcium oxide, wherein the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the light calcium oxide is 3:1:2: 1;
the pigment is carbon black;
the catalyst is dibutyltin dilaurate;
the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.
The performance of the one-component water-curable polyurethane waterproof coating prepared by the preparation process examples 1 to 4 of the present invention was examined and analyzed, the tensile strength, elongation at break, low-temperature bending property, water impermeability, and the like were examined by using the national standard, and the tear strength, adhesive strength, thermal conductivity, aging resistance, and the like were examined, and the results are shown in the following table:
TABLE 1 Performance test results of one-component water-curable polyurethane waterproofing paint
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A preparation method of a single-component water-curing polyurethane waterproof coating is characterized by comprising the steps of drying, mixing, prepolymerization, chain extension and film forming;
and (3) drying: respectively carrying out vacuum dehydration treatment on polyether dihydric alcohol and polyether trihydric alcohol until the water content is 0.11%;
mixing: mixing polyether diol and polyether triol according to the mass ratio of 15:2, stirring, and adding benzoyl chloride into a reaction kettle;
the addition amount of the benzoyl chloride is 0.1 percent of the total weight of the polyether diol and the polyether triol;
and (3) prepolymerization: introducing nitrogen for 20 minutes at normal pressure, removing air in the reaction kettle, adding MDI under the protection of nitrogen atmosphere, raising the temperature to 80 ℃ and carrying out prepolymerization reaction for 4 hours to obtain a prepolymer;
the adding amount of MDI is controlled to be 5.5wt% of-NCO group content in the reaction liquid;
and (3) chain extension: adding 20 parts of plasticizer in total mass into the prepolymer, uniformly stirring at a high speed, raising the reaction temperature to 50 ℃, adding 3 parts of dihydric alcohol, and continuing stirring for 1 hour;
the plasticizer is anhydrous chlorinated paraffin;
the dihydric alcohol is ethylene glycol;
and (3) film forming: adding a flame retardant, a filler, a catalyst, a defoaming agent and a pigment into the polyurethane waterproof coating, and uniformly mixing to obtain a polyurethane waterproof coating product;
the polyurethane waterproof coating prepared by film forming comprises the following raw materials in parts by weight: 36.5 parts of prepolymer, 20 parts of plasticizer, 3 parts of dihydric alcohol, 20 parts of flame retardant, 20 parts of filler, 0.3 part of catalyst, 0.1 part of defoaming agent and 0.1 part of pigment;
the flame retardant is dimethyl methyl phosphate DMMP;
the filler comprises talcum powder, kaolin, light calcium carbonate and calcium hydroxide, and the mass ratio of the talcum powder to the kaolin to the light calcium carbonate to the calcium hydroxide is 2:1:2: 2;
the pigment is carbon black;
the catalyst is dibutyltin dilaurate;
the defoaming agent is polyoxyethylene polyoxypropylene ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911341806.6A CN111057461B (en) | 2019-12-24 | 2019-12-24 | Preparation method of single-component water-curing polyurethane waterproof coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911341806.6A CN111057461B (en) | 2019-12-24 | 2019-12-24 | Preparation method of single-component water-curing polyurethane waterproof coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111057461A CN111057461A (en) | 2020-04-24 |
| CN111057461B true CN111057461B (en) | 2022-03-11 |
Family
ID=70302556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911341806.6A Active CN111057461B (en) | 2019-12-24 | 2019-12-24 | Preparation method of single-component water-curing polyurethane waterproof coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111057461B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094083A (en) * | 2020-03-27 | 2020-12-18 | 上海固密特新材料科技有限公司 | High-performance polymer cement-based waterproof coating for hydraulic buildings |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238254A (en) * | 2015-11-11 | 2016-01-13 | 科顺防水科技股份有限公司 | Vertical face spraying single-component polyurethane waterproofing paint and preparation method thereof |
| CN107325709A (en) * | 2017-06-30 | 2017-11-07 | 中油佳汇防水科技（深圳）股份有限公司 | A kind of single-component moisture curing polyurethane water-repellent paint and preparation method thereof |
-
2019
- 2019-12-24 CN CN201911341806.6A patent/CN111057461B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238254A (en) * | 2015-11-11 | 2016-01-13 | 科顺防水科技股份有限公司 | Vertical face spraying single-component polyurethane waterproofing paint and preparation method thereof |
| CN107325709A (en) * | 2017-06-30 | 2017-11-07 | 中油佳汇防水科技（深圳）股份有限公司 | A kind of single-component moisture curing polyurethane water-repellent paint and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 用二苯基甲烷二异氰酸酯合成单组分聚氨酯防水涂料;贾芳华等;《化工科技》;20110228;第29-31页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111057461A (en) | 2020-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104448183A (en) | Plant oil-based polyurethane composite material and preparation method thereof | |
| CN112934206A (en) | Modified lignin polyurethane adsorbent and preparation method thereof | |
| CN111909337A (en) | Crosslinking agent, polyurethane prepolymer and single-component polyurethane adhesive | |
| CN111808267A (en) | Halogen-free flame-retardant polyurethane foam and preparation method thereof | |
| CN113444439A (en) | Organic silicon-fluorine modified single-component polyurethane waterproof coating and preparation method thereof | |
| CN111961186A (en) | Thermoplastic polyurethane elastomer and preparation method thereof | |
| CN111057461B (en) | Preparation method of single-component water-curing polyurethane waterproof coating | |
| CN116606415A (en) | Comb-type silane end-capped polyurethane polymer resin, and preparation method and application thereof | |
| CN113980289B (en) | Nitrogen and phosphorus-containing lignin-based flame retardant, preparation method and application thereof | |
| CN110790889A (en) | Polarity-controllable TPU film and preparation method thereof | |
| CN111607062B (en) | Biomass polyurethane foam material and preparation method thereof | |
| CN109354667B (en) | Wear-resistant antifouling thermoplastic polyurethane elastomer and preparation method thereof | |
| CN107083228B (en) | Single-component transparent non-yellowing polyurethane sealant and preparation method thereof | |
| CN114106281A (en) | Method for modifying recycled and regenerated polyol and application of modified polyol | |
| CN115595057A (en) | Anti-aging single-component polyurethane waterproof coating | |
| CN110283290B (en) | Hydrolysis-resistant polyurethane elastomer and preparation method thereof | |
| CN113861436A (en) | Lignin-based nitrogen and phosphorus-containing flame retardant, preparation method and application thereof | |
| CN110845695B (en) | Water-swellable silane polyether type resin and preparation method thereof | |
| CN110684501B (en) | Polyurethane hard foam powder filled single-component polyurethane sealant and preparation method thereof | |
| CN118085221B (en) | Preparation method of carbon dioxide-based polyurethane sponge applied to insoles | |
| CN116217880B (en) | Polyurethane rubber for ceramic piston sealing and preparation method thereof | |
| CN116676036B (en) | Dual-purpose environment-friendly solvent-free bi-component polyurethane waterproof coating as well as preparation method and application thereof | |
| CN113929861B (en) | Heat-insulating transparent low-hardness polyurethane elastomer composition and preparation method thereof | |
| CN116875175B (en) | Polyurethane waterproof coating | |
| CN114805732B (en) | Preparation method of biodegradable polyurethane foaming material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |