CN114213958B - Biomass oil-based single-component polyurethane waterproof paint and preparation method thereof - Google Patents
Biomass oil-based single-component polyurethane waterproof paint and preparation method thereof Download PDFInfo
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- CN114213958B CN114213958B CN202111561299.4A CN202111561299A CN114213958B CN 114213958 B CN114213958 B CN 114213958B CN 202111561299 A CN202111561299 A CN 202111561299A CN 114213958 B CN114213958 B CN 114213958B
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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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to a polyurethane waterproof coating, in particular to a biomass oil-based single-component polyurethane waterproof coating and a preparation method thereof. The technical scheme is as follows: the composition is characterized by comprising the following raw materials in parts by weight: 260-295 parts of polyether polyol, 105-170 parts of biomass oil, 45-47 parts of isocyanate, 15-16.5 parts of latent curing agent, 0-90 parts of diluent, 450-500 parts of filler, 1.5-2.5 parts of high-efficiency dispersion viscosity reducer, 1.5-7.5 parts of anti-settling thixotropic agent, 1.1-1.4 parts of catalyst, 0.5-2.0 parts of defoaming agent, 5-10 parts of titanium pigment and 3-5.5 parts of photo-oxygen stabilizer; the beneficial effects are that: the environment-friendly coating integrates various performances such as high strength, low viscosity, sagging resistance and the like, and improves the adaptability, construction convenience and reliability of a base layer; the construction can be carried out by adopting mechanical spraying or roller coating, the construction efficiency is high, and the operability is good; can be used by exposing, and has good photo-oxidation stability.
Description
Technical Field
The invention relates to a polyurethane waterproof coating, in particular to a biomass oil-based single-component polyurethane waterproof coating and a preparation method thereof.
Background
The polyurethane waterproof coating is used as a high-molecular waterproof material and has the technical advantages of high strength, good elasticity, strong bonding force, high and low temperature resistance, corrosion resistance, easiness in repair and the like. The polyurethane waterproof coating has the advantages of multiple functions and integral film forming property, overcomes the defect that waterproof coiled materials need to be lapped, has the integral waterproof effect of forming full adhesion with a building structure, can meet the requirements of various building waterproof projects, is suitable for the waterproof and seepage-proofing of any base construction with complex structure, is particularly suitable for the waterproof and seepage-proofing of roofs, basements and bathroom with special-shaped structures and more pipelines, and ensures the waterproof and seepage-proofing quality of the whole project.
Various coal tar polyurethane substitute products appear in the market, including asphalt modified polyurethane waterproof paint, single-component polyurethane waterproof paint, colored polyurethane waterproof paint and the like.
After decades of popularization and development, the industry standard can not meet the market demand, and the national standard GB/T19250-2003 polyurethane waterproof coating of the people's republic of China is proposed and established by the Chinese building materials union. With the rapid development of the national economic construction in the 21 st century, the polyurethane waterproof coating has gained a rapid growth in the field of national key engineering construction in addition to the explosive growth of the civil market, and higher technical requirements are put forward for the polyurethane waterproof coating, and in addition, with the improvement of the domestic environmental protection and safety consciousness, the requirements for the environmental protection and the like of the polyurethane waterproof coating are increasingly improved. Therefore, the functional development trend of the polyurethane waterproof coating is increasingly obvious, such as: high strength, anti-sagging property of the vertical wall, yellowing resistance, solvent-free property and the like gradually become research and application hotspots.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the single-component polyurethane waterproof coating based on the biomass oil and the preparation method thereof, so that the single-component polyurethane waterproof coating integrates various performances such as high strength, low viscosity, sagging resistance and the like, has the technical characteristics of cold construction on a wet base surface, yellowing resistance, exposed use, high construction efficiency and the like, improves the adaptability, construction convenience and reliability of the base layer of the single-component polyurethane waterproof coating, and widens the application field of the single-component polyurethane waterproof coating.
The invention provides a biomass oil-based single-component polyurethane waterproof coating, which adopts the technical scheme that: the composition is characterized by comprising the following raw materials in parts by weight: 260 to 295 portions of polyether polyol, 115 to 180 portions of biomass oil, 42 to 48 portions of isocyanate, 15 to 20 portions of latent curing agent, 0 to 97 portions of diluent, 425 to 500 portions of filler, 1.5 to 2.5 portions of high-efficiency dispersion viscosity reducer, 1.5 to 10 portions of anti-settling thixotropic agent, 0.6 to 1.5 portions of catalyst, 0.5 to 2.0 portions of defoaming agent, 5 to 10 portions of titanium pigment and 3 to 5.5 portions of photo-oxygen stabilizer.
Wherein the diluent is a hydrocarbon; the filler is heavy calcium carbonate; the efficient dispersion viscosity reducer is a dispersion viscosity reducer YRFC-06; the anti-settling thixotropic agent is organic bentonite or attapulgite; the titanium dioxide is rutile titanium dioxide R105; the drier is an environment-friendly drier WCAT-WP01; the defoaming agent is mixed modified polysiloxane.
The main indicators of the polyether polyol include: the viscosity at 25 ℃ is 400-500mPa.s, the hydroxyl value is 47-50 mg KOH/g, and the unsaturated value is less than or equal to 0.01mol/kg. The polyether polyol can be a chemical mixed type combined polyether polyol, and can also be a physical mixed type combined polyether polyol formed by mixing polypropylene oxide ether dihydric alcohol and polypropylene oxide ether trihydric alcohol.
The latent curing agent is at least one of aldimine and ketimine latent curing agents.
The biomass oil is selected from at least one of chlorinated palm oil methyl ester and epoxidized soybean oil.
The isocyanate is selected from 4,4' -dicyclohexylmethane diisocyanate (HMDI), hexamethylene Diisocyanate (HDI) and at least one of isophorone diisocyanate (IPDI) as the isocyanate.
Preferably, the main indicators of the polyether polyols mentioned above include: the viscosity is 400-500mPa.s at 25 ℃, the hydroxyl value is 47-50 mg KOH/g, and the unsaturated value is less than or equal to 0.01mol/kg.
Preferably, the latent curing agent is a ketimine latent curing agent.
Preferably, the biomass oil is chlorinated palm oil methyl ester.
Preferably, the isocyanate is hexamethylene diisocyanate,
preferably, the photooxidation stabilizer is a compound of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 2- (2 ' -hydroxy-3 ',5' -dipentylphenyl) benzotriazole.
The preparation method of the biomass oil-based single-component polyurethane waterproof coating comprises the following steps:
1) Sequentially adding the biomass oil, the polyether polyol, the photo-oxygen stabilizer and the titanium dioxide in the dispersion kettle under the stirring state, stirring and heating to 120-125 ℃, then sequentially adding the high-efficiency dispersion viscosity reducer, the filler and the anti-settling thixotropic agent, stirring and heating to 100-105 ℃, and carrying out heat preservation, stirring and lightness removal for more than 120min;
2) Starting a colloid mill to feed the premix prepared in the step 1) into a polymerization reaction kettle, continuously stirring and heating to 120-125 ℃, performing vacuum dehydration for 120-180 min, and properly prolonging dehydration until the water content is less than 0.03% if necessary;
3) After dehydration, cooling water is introduced, stirring and cooling are carried out to 75-80 ℃, then the diluent and isocyanate are sequentially added, attention is paid to observing the temperature rise condition in the reaction process, after reaction is carried out for 180min at the temperature of 75-80 ℃, a proper amount of catalyst is slowly added, and then reaction is carried out for 60-90 min at the temperature of 80-85 ℃ to prepare a prepolymer;
4) And 3) sequentially adding the latent curing agent, the catalyst, the diluent and the defoaming agent into the prepolymer prepared in the step 3) under the stirring state, cooling and stirring for more than 60min to 50-55 ℃, stopping stirring, performing vacuum defoaming for more than 15min, discharging, filtering, metering and filling.
Compared with the prior art, the invention has the following beneficial effects:
1. the method is environment-friendly: the product has high solid content and low content of volatile solvent, adopts an environment-friendly catalyst and a biomass plasticizer, and does not contain heavy metal and a phthalic plasticizer which are prepared by environment-friendly control;
2. the vertical wall has strong anti-sliding property: the product has strong thixotropy, thick coating can be performed on the vertical surface, sagging is avoided, and the drying speed is high;
3. the use is convenient: the single-component product can be used after being opened, does not need to be mixed in proportion, and is convenient to construct;
4. the basic layer has strong adaptability. By adopting a latent curing design scheme, the wet base construction is not foamed, the strength is high, the elongation is high, and the method can effectively adapt to cracking, deformation and the like caused by base stress;
5. the construction operability is good, the product viscosity is low, the mechanical spraying or roller coating method can be adopted for construction, and the construction efficiency is high;
6. can be used by being exposed, has good light-oxygen stability, aging resistance and yellowing resistance, and can be widely applied to hidden and exposed water prevention of bathroom, underground engineering, concrete roofing engineering and the like of industrial and civil buildings.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Examples 1 to 4 are specific embodiments of the biomass oil-based one-component polyurethane waterproof coating and the preparation method thereof; examples 5 to 7 are comparative examples designed by the applicant.
Example 1
The invention provides a biomass oil-based single-component polyurethane waterproof coating which is prepared from the following raw materials in parts by weight:
260 parts of polyether polyol, 115 parts of biomass oil, 42 parts of isocyanate, 15 parts of latent curing agent, 97 parts of diluent, 500 parts of filler, 2 parts of efficient dispersion viscosity reducer, 10 parts of anti-settling thixotropic agent, 0.6 part of catalyst, 0.5 part of defoaming agent, 8 parts of titanium dioxide and 3 parts of photo-oxygen stabilizer.
The main indicators of the polyether polyols used include: the viscosity is 400-500mPa.s at 25 ℃, and the hydroxyl value is 47-50 mg KOH/g. The unsaturated value is less than or equal to 0.01mol/kg;
the biomass oil adopts chlorinated palm oil methyl ester, and the technical parameters include but are not limited to: the volatile matter with the opening flash point of more than or equal to 180 ℃ and the temperature of 125 ℃ for 2 hours is less than or equal to 0.5 percent by mass percent, the density is 1.05 to 1.08 g/cm < 3 > at the temperature of 25 ℃, and the water content is less than or equal to 0.3 percent by mass percent;
the isocyanate adopts Hexamethylene Diisocyanate (HDI), the latent curing agent is a ketimine latent curing agent, the diluent adopts hydrocarbon produced by Shandongshiton company, and typical physical indexes are as follows: the density is 0.87-0.90 g/cm at 25 DEG C 3 The aniline point is 13-17 ℃, the surface tension is 28-40 mN/m at 25 ℃, the solubility parameter delta = 6.0-9.0, the distillation range is 150-215 ℃, and the water content is less than or equal to 0.03%.
The filler is heavy calcium carbonate with the fineness of 800-3000 meshes and the water content of less than or equal to 0.3 percent.
The efficient dispersion viscosity reducer adopts solvent-free polyurethane efficient dispersion viscosity reducer YRFC-06. Is brown transparent liquid, is slightly soluble in water, is soluble in a polyurethane system, and has typical physical indexes that: the density is 0.975-1.015 g/cm at 25 DEG C 3 The chroma (Fe-Co) is less than or equal to 13, and the viscosity is 700 +/-300mPa.s at 25 ℃.
The anti-settling thixotropic agent is organic bentonite, and is a general industrial product sold in the market.
The catalyst adopts an environment-friendly drier WCAT-WP01. Is yellow to brown liquid, is easy to dissolve in polyurethane system, and does not contain heavy metals such as tin, lead, mercury and the like. Typical physical property index thereofThe method comprises the following steps: density at 25 ℃ of 1.105g/cm 3 The chroma (Fe-Co) is less than or equal to 13, the viscosity is 97mPa.s at 25 ℃, and the crystallization point is 15 ℃.
The defoaming agent adopts mixed modified polysiloxane which is a general industrial product sold in the market.
The titanium dioxide adopts rutile type titanium dioxide R105,
preferably, the photooxidation stabilizer is prepared by mixing pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 2- (2 ' -hydroxy-3 ',5' -dipentylphenyl) benzotriazole according to a mass ratio of 1:1.
The invention relates to a preparation method of a single-component polyurethane waterproof coating based on biomass oil, which comprises the following steps:
1) Under the stirring state in the dispersion kettle, sequentially adding 115 parts of biomass oil methyl palm oil chloride, 260 parts of chemical mixed polymerization type combined polyether polyol, 3 parts of photo-oxygen stabilizer and 8 parts of titanium dioxide, stirring and heating to 125 ℃, then sequentially adding 2 parts of efficient dispersion viscosity reducer, 500 parts of filler and 10 parts of anti-settling thixotropic agent, stirring and heating to 105 ℃, preserving heat, stirring and removing lightness for 150min;
2) Starting a colloid mill to send the premix prepared in the step 1) into a polymerization reaction kettle, continuously stirring and heating to 125 ℃, and performing vacuum dehydration for 180min until the water content is less than 0.03%;
3) After dehydration, introducing cooling water, stirring and cooling to 80 ℃, then sequentially adding 50 parts of diluent and 42 parts of isocyanate HDI, observing the temperature rise condition of the reaction process during the process, controlling the temperature to be 80 ℃ for reaction for 180min, then slowly adding a proper amount of 0.3 part of catalyst, controlling the temperature to be 80 ℃ for reaction for 90min to prepare a prepolymer;
4) And 3) sequentially adding 15 parts of latent curing agent, 0.3 part of catalyst, 47 parts of diluent and 0.5 part of defoaming agent into the prepolymer prepared in the step 3) under the stirring state, cooling and stirring for 60min to 50 ℃, stopping stirring, carrying out vacuum defoaming for 15min, discharging, filtering, metering and filling.
Example 2
The invention provides a biomass oil-based single-component polyurethane waterproof coating and a preparation method thereof, wherein the biomass oil-based single-component polyurethane waterproof coating is prepared from the following raw materials in parts by weight: 270 parts of polyether polyol, 120 parts of biomass oil, 43 parts of isocyanate, 15 parts of latent curing agent, 68 parts of diluent, 500 parts of filler, 2 parts of high-efficiency dispersion viscosity reducer, 5.5 parts of anti-settling thixotropic agent, 0.9 part of catalyst, 1.0 part of defoaming agent, 5 parts of titanium dioxide and 3 parts of photo-oxygen stabilizer.
The product specifically adopted in this example refers to the description of example 1, except that: the latent curing agent is an aldimine latent curing agent.
The preparation method also comprises the following preparation process steps:
1) Sequentially adding 120 parts of biomass oil methyl palm oil chloride, 270 parts of chemical blending type combined polyether polyol, 3 parts of photo-oxygen stabilizer and 5 parts of titanium dioxide under stirring in a dispersion kettle, stirring and heating to 125 ℃, sequentially adding 2 parts of efficient dispersion viscosity reducer, 500 parts of filler and 5.5 parts of anti-settling thixotropic agent, stirring and heating to 105 ℃, preserving heat, stirring and removing lightness for 150min;
2) Starting a colloid mill to send the premix prepared in the step 1) into a polymerization reaction kettle, continuously stirring and heating to 125 ℃, and performing vacuum dehydration for 150min until the water content is less than 0.03%;
3) After dehydration is finished, cooling water is introduced, stirring is carried out, the temperature is reduced to 75 ℃, then 35 parts of diluent and 43 parts of isocyanate HDI are sequentially added, the temperature rise condition in the reaction process is observed, after reaction is carried out for 180min at the temperature of 80 ℃, a proper amount of 0.3 part of catalyst is slowly added, and then reaction is carried out for 60min at the temperature of 85 ℃ to prepare a prepolymer;
4) And 3) sequentially adding 15 parts of latent curing agent, 0.6 part of catalyst, 33 parts of diluent and 1.0 part of defoaming agent into the prepolymer prepared in the step 3) under the stirring state, cooling and stirring for 70min to 55 ℃, stopping stirring, carrying out vacuum defoaming for 15min, discharging, filtering, metering and filling.
Example 3
The invention provides a biomass oil-based single-component polyurethane waterproof coating and a preparation method thereof, wherein the biomass oil-based single-component polyurethane waterproof coating is prepared from the following raw materials in parts by weight: 275 parts of polyether polyol, 155 parts of biomass oil, 45 parts of isocyanate, 18 parts of latent curing agent, 28 parts of diluent, 450 parts of filler, 1.5 parts of high-efficiency dispersion viscosity reducer, 4 parts of anti-settling thixotropic agent, 1.3 parts of catalyst, 1.5 parts of defoaming agent, 7 parts of titanium pigment and 5 parts of photo-oxygen stabilizer.
The product specifically adopted in this embodiment is described with reference to embodiment 1, except that: the anti-settling thixotropic agent is attapulgite.
The preparation method also comprises the following preparation process steps:
1) Adding 155 parts of biomass oil methyl palm oil chloride, 275 parts of chemical mixed poly type combined polyether polyol, 5 parts of photo-oxygen stabilizer and 7 parts of titanium dioxide in turn in a dispersion kettle under a stirring state, stirring and heating to 120 ℃, adding 1.5 parts of efficient dispersion viscosity reducer, 450 parts of filler and 4 parts of anti-settling thixotropic agent in turn, stirring and heating to 105 ℃, preserving heat, stirring and removing light for 125min;
2) Starting a colloid mill to feed the premix prepared in the step 1) into a polymerization reaction kettle, continuously stirring and heating to 120 ℃, and carrying out vacuum dehydration for 180min until the water content is less than 0.03%;
3) After dehydration, introducing cooling water, stirring and cooling to 75 ℃, then sequentially adding 18 parts of diluent and 45 parts of isocyanate HDI, observing the temperature rise condition of the reaction process during the process, controlling the temperature to be 80 ℃, reacting for 180min, then slowly adding a proper amount of 0.5 part of catalyst, controlling the temperature to be 80 ℃, and reacting for 90min to prepare a prepolymer;
4) And 3) sequentially adding 18 parts of latent curing agent, 0.7 part of catalyst, 10 parts of diluent and 1.5 parts of defoaming agent into the prepolymer prepared in the step 3) under the stirring state, cooling and stirring for 70min to 50 ℃, stopping stirring, carrying out vacuum defoaming for 15min, discharging, filtering, metering and filling.
Example 4
The invention provides a biomass oil-based single-component polyurethane waterproof coating and a preparation method thereof, wherein the biomass oil-based single-component polyurethane waterproof coating is prepared from the following raw materials in parts by weight: 295 parts of polyether polyol, 180 parts of biomass oil, 48 parts of isocyanate, 20 parts of latent curing agent, 425 parts of filler, 2.5 parts of high-efficiency dispersion viscosity reducer, 1.5 parts of anti-settling thixotropic agent, 1.5 parts of catalyst, 2 parts of defoaming agent, 10 parts of titanium dioxide and 5.5 parts of photo-oxygen stabilizer.
The product specifically adopted in this example is described with reference to example 1.
The preparation method also comprises the following preparation process steps:
1) Adding 180 parts of biomass oil methyl palm chloride, 295 parts of chemical blending type combined polyether polyol, 5.5 parts of photo-oxygen stabilizer and 10 parts of titanium dioxide in turn in a dispersion kettle under stirring, stirring and heating to 120 ℃, adding 2.5 parts of efficient dispersion viscosity reducer, 425 parts of filler and 1.5 parts of anti-settling thixotropic agent in turn, stirring and heating to 100 ℃, preserving heat, stirring and removing lightness for 120min;
2) Starting a colloid mill to send the premix prepared in the step 1) into a polymerization reaction kettle, continuously stirring and heating to 120 ℃, and performing vacuum dehydration for 120min until the water content is less than 0.03%;
3) After dehydration, introducing cooling water, stirring, cooling to 75 ℃, adding 48 parts of isocyanate HDI, observing the temperature rise condition in the reaction process, controlling the temperature to be 75 ℃, reacting for 180min, slowly adding a proper amount of 0.5 part of catalyst, and reacting for 75min at 80 ℃ to prepare a prepolymer;
4) And 3) sequentially adding 20 parts of latent curing agent, 1.0 part of catalyst and 2 parts of defoaming agent into the prepolymer prepared in the step 3) under the stirring state, cooling and stirring for 70min to 55 ℃, stopping stirring, performing vacuum defoaming for 20min, discharging, filtering, metering and filling.
Example 5
The difference between the biomass oil-based single-component polyurethane waterproof coating and the preparation method provided by the comparative example and the example 3 is that polyether polyol is replaced by mixed polyether and the like which are composed of polyether diol and polyether triol according to the mass ratio of 7:3; the anti-settling thixotropic agent is organic bentonite.
Example 6
The comparative example provides a bio-oil-based one-component polyurethane waterproof coating and a preparation method thereof, which are different from example 3 in that a mixed bio-oil composed of 120 parts of chlorinated palm oil methyl ester and 35 parts of epoxy soybean oil is used in place of the chlorinated palm oil methyl ester.
Example 7
The difference between the biomass oil-based single-component polyurethane waterproof coating and the preparation method provided in this comparative example and example 4 is that cyanate ester HDI is replaced with cyanate ester HMDI and other masses.
Performance testing
The performance index detection is carried out according to the related national standard GB/T19250-2013 polyurethane waterproof coating, and the related performance test data of the examples 1-4 and the comparative examples 5-7 are respectively shown in the tables 1 and 2.
TABLE 1 test results of examples 1 to 4
TABLE 2 test results of comparative examples 6 to 7
The data show that the examples designed by the applicant and the comparative examples have excellent physical and environmental-friendly properties, the comprehensive properties of the examples are obviously higher than the performance requirements of the related national standard GB/T19250-2013 polyurethane waterproof coating, and particularly the environmental-friendly properties of the product with the solid content higher than 97% are obviously higher than the highest requirements of the class A products.
The above description is only for the preferred embodiments of the present invention, and is not intended to limit the present invention in any way. Any person skilled in the art may modify or equivalently change the embodiments described above using the teachings set forth. However, any simple modification and equivalent changes of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention without departing from the technical solution of the present invention.
Claims (1)
1. A single-component polyurethane waterproof coating based on biomass oil is characterized by comprising the following raw materials in parts by weight:
260 parts of polyether polyol, 115 parts of biomass oil, 42 parts of isocyanate, 15 parts of latent curing agent, 97 parts of diluent, 500 parts of filler, 2 parts of high-efficiency dispersion viscosity reducer, 10 parts of anti-settling thixotropic agent, 0.6 part of catalyst, 0.5 part of defoaming agent, 8 parts of titanium dioxide and 3 parts of photo-oxygen stabilizer;
the main indicators of the polyether polyols used include: viscosity is 400-500mPa.s at 25 ℃, hydroxyl value is 47-50 mg KOH/g, and unsaturated value is less than or equal to 0.01mol/kg;
the biomass oil adopts chlorinated palm oil methyl ester;
the isocyanate adopts hexamethylene diisocyanate, and the latent curing agent is a ketimine latent curing agent;
the filling material adopts heavy calcium carbonate, the fineness of the heavy calcium carbonate is 800-3000 meshes, and the water content is less than or equal to 0.3 percent;
the efficient dispersion viscosity reducer adopts solvent-free polyurethane efficient dispersion viscosity reducer YRFC-06;
the anti-settling thixotropic agent is organic bentonite;
the catalyst adopts an environment-friendly drier WCAT-WP01;
the defoaming agent adopts mixed modified polysiloxane;
the titanium dioxide adopts rutile type titanium dioxide R105;
the photooxidation stabilizer consists of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 2- (2 ' -hydroxy-3 ',5' -dipentylphenyl) benzotriazole, and is compounded according to the mass ratio of 1:1;
the preparation method of the biomass oil-based single-component polyurethane waterproof coating comprises the following steps:
1. under the stirring state in the dispersion kettle, sequentially adding 115 parts of biomass oil chlorinated palm oil methyl ester, 260 parts of chemical mixed polymerization type combined polyether polyol, 3 parts of photo-oxygen stabilizer and 8 parts of titanium dioxide, stirring and heating to 125 ℃, then sequentially adding 2 parts of high-efficiency dispersion viscosity reducer, 500 parts of filler and 10 parts of anti-settling thixotropic agent, stirring and heating to 105 ℃, preserving heat, stirring and dehydrogenating for 150min;
2. starting a colloid mill to send the premix prepared in the step one into a polymerization reaction kettle, continuously stirring and heating to 125 ℃, and performing vacuum dehydration for 180min until the water content is less than 0.03%;
3. after dehydration, introducing cooling water, stirring and cooling to 80 ℃, then sequentially adding 50 parts of diluent and 42 parts of isocyanate HDI, observing the temperature rise condition of the reaction process during the process, controlling the temperature to be 80 ℃ for reaction for 180min, then slowly adding a proper amount of 0.3 part of catalyst, controlling the temperature to be 80 ℃ for reaction for 90min to prepare a prepolymer;
4. and C, sequentially adding 15 parts of latent curing agent, 0.3 part of catalyst, 47 parts of diluent and 0.5 part of defoaming agent into the prepolymer prepared in the step three under the stirring state, cooling and stirring for 60min to 50 ℃, stopping stirring, carrying out vacuum defoaming for 15min, discharging, filtering, metering and filling.
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| CN112708340A (en) * | 2020-12-29 | 2021-04-27 | 江苏雨中情防水材料有限责任公司 | Anti-sagging single-component polyurethane waterproof coating capable of being sprayed and constructed |
| CN113402965A (en) * | 2021-08-02 | 2021-09-17 | 福建省三棵树新材料有限公司 | High-bio-based-content single-component polyurethane waterproof coating and preparation method thereof |
| CN113502121A (en) * | 2021-08-02 | 2021-10-15 | 福建省三棵树新材料有限公司 | Palm oil-based plasticizer latent curing type single-component polyurethane waterproof coating and preparation method thereof |
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| CN114213958A (en) | 2022-03-22 |
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