CN111500246A - Solvent-free polyurethane adhesive for colored pavement and preparation method thereof - Google Patents
Solvent-free polyurethane adhesive for colored pavement and preparation method thereof Download PDFInfo
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- CN111500246A CN111500246A CN202010453000.2A CN202010453000A CN111500246A CN 111500246 A CN111500246 A CN 111500246A CN 202010453000 A CN202010453000 A CN 202010453000A CN 111500246 A CN111500246 A CN 111500246A
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- 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
- C08G18/3225—Polyamines
- C08G18/3237—Polyamines aromatic
- C08G18/324—Polyamines aromatic containing only one aromatic ring
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- 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
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/68—Unsaturated polyesters
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
Abstract
The invention discloses a solvent-free polyurethane adhesive for colored pavements, which comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: soybean oil polyester polyol, 1, 4-bis-sec-butyl aminobenzene, diisopropyl naphthalene, a dispersing agent BYKP104, zeolite powder, silicon micropowder and iron oxide red powder. The polyol resin mainly containing soybean oil derivatives is used as a hydroxyl component, and the soybean oil is wide and rich in source, belongs to all natural renewable resources, is green and environment-friendly, and is not easily influenced by a single supplier to have large fluctuation. The timeliness of supply and the stability of cost price can be effectively guaranteed. And the soybean oil polyol which takes polyester as the main component is adopted, so that the tensile strength of a cured product is greatly improved compared with that of common grease polyol resin which takes polyether as the main component. The diisopropyl naphthalene flexibilizer is used, so that the water resistance of the product can be improved while toughening is carried out.
Description
Technical Field
The invention relates to the technical field of preparation of binders, in particular to a solvent-free polyurethane binder for colored pavements and a preparation method thereof.
Background
With the development of economy and the progress of society, people put forward new requirements on the road performances of urban main roads, other motor-driven lanes, non-motor-driven lanes, sidewalks and the like, in the aspects of traffic warning, visual safety guidance, attractive road surface and the like, besides the daily road performances. At present, the common black asphalt pavement and the common gray cement concrete pavement cannot completely meet the new increasing demands of the pavement. The colored pavement can be used for enhancing the driving safety of the pavement, warning passing vehicles, standardizing the road category, facilitating the operation and management, maintaining the traffic safety and the like by paving a colored pavement layer on the existing pavement. Meanwhile, the decorative material can be used in areas such as sports places, pedestrian streets, parking lots, circular bicycle lanes and the like to bring a good decorative effect, and can also be used in high-risk traffic areas such as crossroads, emergency stop belts for highways, ramp interfaces for high-speed tunnels and the like to play roles in traffic safety signs and improving road visibility.
Depending on the type of polymer material used, colored pavement can be simply divided into: the colored asphalt concrete pavement, the high polymer material agglutinates the colored particle pavement. The colored asphalt concrete is influenced by raw materials, cannot keep bright color and performance for a long time, and is complex in construction and limited in application. The polymer material cemented colored particle pavement is widely applied due to the rich color, the convenient and simple construction.
The polymer binders used for polymer-bonded colored particle pavement are classified according to the dispersion media used, and mainly include solvent-based binders, solvent-free binders, and water-based binders. The solvent type is gradually eliminated by the market due to the fact that the VOC content is very high and does not meet the policy requirement of environmental protection. The solid content of the water-based polymer material is not high enough, so that a thick pavement layer is difficult to form, the water-based polymer material cannot be used on a pavement with high traffic flow, the curing process is influenced by humidity in the air, and the water-based polymer material cannot be normally cured in humid climate, so that the application and popularization are greatly limited.
The solvent-free binder material has high strength due to 100% of effective content and high polymer condensate formed by crosslinking and curing reaction, can be applied in wide weather, has low VOC emission, is green and environment-friendly, is favored by the market, and is applied more and more in recent years.
The main binders for the conventional solvent-free colored particle pavement are: the adhesive comprises a two-component solvent-free epoxy resin adhesive, a two-component solvent-free polyurethane adhesive and a two-component polymethyl methacrylate (PMMA) adhesive.
The double-component polymethyl methacrylate (PMMA) binder has good weather resistance and mechanical strength, but has pungent odor (from acrylic monomers and reactive diluent cross-linking agents), belongs to flammable and explosive dangerous chemicals, has high requirements on storage and transportation, and is expensive; in addition, the curing process is free radical polymerization, the addition amount of the initiator has great influence on the shelf life after blending, and if the curing is too fast in the field operation process, the wetting time of the base material and the aggregate is not sufficient, so that the adhesion defect is easy to occur.
The double-component solvent-free epoxy resin adhesive has good adhesive force and mechanical strength, but has poor elasticity retention rate at low temperature, so that the pavement cracks when in use, and is particularly paved on a cell asphalt base material with low strength.
The double-component solvent-free polyurethane adhesive has good adhesive force and mechanical strength, excellent toughness and elasticity, and particularly good elasticity retention rate at low temperature. The color pavement has wide adaptability to various pavement base materials, has obvious application advantages and can form a durable color pavement.
Since the polyol polymer is derived from castor oil, the current domestic supply of castor oil is mainly from india. The supply may be limited by the origin of the material. Particularly in 2020, due to the influence of new crown epidemic situations all over the world, the supply of castor oil raw materials is unstable and the price is greatly increased due to the fact that Indian places in enchance. Resulting in great fluctuations in the supply and price of the binder product. In addition, the unmodified castor oil is a polyol, and the tensile strength of the cured product prepared from the polyol is low (< 10 MPa).
Disclosure of Invention
The invention aims to provide a solvent-free polyurethane adhesive for a colored pavement and a preparation method thereof, solves the problems in the background art, and meets the actual use requirements.
In order to achieve the purpose, the invention provides the following technical scheme: the solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: soybean oil polyester polyol (molecular weight 2500, hydroxyl value 330, functionality 5), soybean oil polyester polyol (molecular weight 1200, hydroxyl value 130, functionality 2.5), 1, 4-bis-sec-butyl aminobenzene, diisopropyl naphthalene, dispersant BYKP104, zeolite powder, silicon micropowder and iron oxide red powder.
As a preferred embodiment of the invention, the raw materials are weighed according to the following weight percentage: 24% of soybean oil polyester polyol (molecular weight is 2500, hydroxyl value is 330, and functionality is 5), 30% of soybean oil polyester polyol (molecular weight is 1200, hydroxyl value is 130, and functionality is 2.5), 1, 4-bis-sec-butyl aminobenzene, 4% of diisopropyl naphthalene, 10% of zeolite powder, a dispersing agent BYKP1040.5, 29.5% of silicon micropowder, and 1% of iron oxide red powder.
As a preferred embodiment of the present invention, the curing agent comprises 50% polymethylene polyphenyl isocyanate PAPI (NCO ═ 32%, functionality 2.7) and 50% modified MDI prepolymer (NCO ═ 23%, functionality 2).
As a preferred embodiment of the present invention, the method for preparing the solvent-free polyurethane binder for colored pavement comprises the steps of:
s1: preparing a main agent: adding soybean oil polyester polyol (molecular weight of 2500, hydroxyl value of 330 and functionality of 5), soybean oil polyester polyol (molecular weight of 1200, hydroxyl value of 130 and functionality of 2.5), diisopropyl naphthalene and zeolite powder into a batching tank according to a proportion, and mixing at a rotating speed of 500-600 rpm for 30min to obtain a mixed primary liquid;
s2: adding 1, 4-bis-sec-butylaminobenzene and a dispersant BYKP104 into the mixed primary liquid obtained in S1, and continuously mixing at the rotation speed of 500-600 rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the iron oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1000-1500 rpm, sampling and testing the fineness, and obtaining a qualified main agent with the fineness of less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: sequentially adding polymethylene polyphenyl isocyanate (PAPI) and the modified MDI prepolymer into a vacuum dispersion machine according to a proportion, uniformly mixing at a rotating speed of 200-300 rpm, filling the mixed curing agent into a packaging barrel, filling nitrogen for protection, and tightly closing the sealing cover for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a preferred embodiment of the present invention, the fine silica powder used in step S3 is 400 mesh, and the red iron oxide powder is 325 mesh.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the polyol resin mainly containing the soybean oil derivative is used as the hydroxyl component, and the soybean oil is wide and rich in source, belongs to all natural renewable resources, is green and environment-friendly, and is not easily influenced by a single supplier to generate large fluctuation. The timeliness of supply and the stability of cost price can be effectively guaranteed. Compared with common grease polyol resin which takes polyether as the main component, the soybean oil polyol which takes polyester as the main component is adopted, the tensile strength of a condensate is greatly improved, and although the breaking elongation is partially reduced, the product is applied to a road surface layer, so that higher tensile strength is required instead of higher breaking elongation;
the diisopropyl naphthalene flexibilizer is used, so that the water resistance of the product can be improved while toughening is carried out. In addition, the tearing strength and the tensile strength of the product are further improved by selecting the diamine chain extender with lower reactivity, and a more appropriate pot life (23 ℃, 30 minutes) can be obtained, and the pot life can ensure that the product has a longer leveling period and a better wetting time for a base material after blade coating so as to form good adhesive force, and also has faster curing time and early strength.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent is prepared by weighing the following raw materials in percentage by weight: 24% of soybean oil polyester polyol (molecular weight is 2500, hydroxyl value is 330, and functionality is 5), 30% of soybean oil polyester polyol (molecular weight is 1200, hydroxyl value is 130, and functionality is 2.5), 1, 4-bis-sec-butyl aminobenzene, 4% of diisopropyl naphthalene, 10% of zeolite powder, a dispersing agent BYKP1040.5, 29.5% of silicon micropowder, and 1% of iron oxide red powder.
In a further development, the curing agent comprises 50% of polymethylene polyphenyl isocyanate PAPI (NCO ═ 32%, functionality 2.7) and 50% of modified MDI prepolymer (NCO ═ 23%, functionality 2).
In a further improvement, the preparation method of the solvent-free polyurethane adhesive for colored pavement comprises the following steps:
s1: preparing a main agent: adding soybean oil polyester polyol (molecular weight of 2500, hydroxyl value of 330 and functionality of 5), soybean oil polyester polyol (molecular weight of 1200, hydroxyl value of 130 and functionality of 2.5), diisopropyl naphthalene and zeolite powder into a batching tank according to a proportion, and mixing at a rotation speed of 550rpm for 30min to obtain a mixed primary liquid;
s2: adding 1, 4-bis-sec-butylaminobenzene and a dispersant BYKP104 into the mixed primary liquid obtained in S1, and continuously mixing at the rotation speed of 550rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the ferric oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1200rpm, sampling and testing the fineness, and obtaining a qualified main agent when the fineness is less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: sequentially adding polymethylene polyphenyl isocyanate (PAPI) and the modified MDI prepolymer into a vacuum dispersion machine according to a proportion, uniformly mixing at a rotating speed of 250rpm, filling the mixed curing agent into a packaging barrel, filling nitrogen for protection, and tightly closing the sealing cover for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a further improvement, the silica micropowder used in step S3 is 400 mesh, and the iron oxide red powder is 325 mesh.
When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
The use effect is as follows: the polyol resin mainly containing soybean oil derivatives is used as a hydroxyl component, and the soybean oil is wide and rich in source, belongs to all natural renewable resources, is green and environment-friendly, and is not easily influenced by a single supplier to have large fluctuation. The timeliness of supply and the stability of cost price can be effectively guaranteed. Compared with common grease polyol resin which takes polyether as the main component, the tensile strength of a condensate is greatly improved by adopting the soybean oil polyol which takes polyester as the main component;
the diisopropyl naphthalene flexibilizer is used, so that the water resistance of the product can be improved while toughening is carried out. In addition, the tearing strength and the tensile strength of the product are further improved by selecting the diamine chain extender with lower reactivity, and a more appropriate pot life (23 ℃, 30 minutes) can be obtained, and the pot life can ensure that the product has a longer leveling period and a better wetting time for a base material after blade coating so as to form good adhesive force, and also has faster curing time and early strength.
Example 2
A solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent is prepared by weighing the following raw materials in percentage by weight: 35% of soybean oil polyester polyol (molecular weight is 2500, hydroxyl value is 330, and functionality is 5), 20% of soybean oil polyester polyol (molecular weight is 1200, hydroxyl value is 130, and functionality is 2.5), 1, 4-bis-sec-butyl aminobenzene, 4% of diisopropyl naphthalene, 10% of zeolite powder, a dispersing agent BYKP1040.5, 29.5% of silicon micropowder, and 1% of iron oxide red powder.
In a further development, the curing agent comprises 50% of polymethylene polyphenyl isocyanate PAPI (NCO ═ 32%, functionality 2.7) and 50% of modified MDI prepolymer (NCO ═ 23%, functionality 2).
In a further improvement, the preparation method of the solvent-free polyurethane adhesive for colored pavement comprises the following steps:
s1: preparing a main agent: adding soybean oil polyester polyol (molecular weight of 2500, hydroxyl value of 330 and functionality of 5), soybean oil polyester polyol (molecular weight of 1200, hydroxyl value of 130 and functionality of 2.5), diisopropyl naphthalene and zeolite powder into a batching tank according to a proportion, and mixing at a rotating speed of 600rpm for 30min to obtain a mixed primary liquid;
s2: adding 1, 4-bis-sec-butylaminobenzene and a dispersant BYKP104 into the mixed primary liquid obtained in S1, and continuously mixing at the rotation speed of 600rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the ferric oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1500rpm, sampling and testing the fineness, and obtaining a qualified main agent when the fineness is less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: sequentially adding polymethylene polyphenyl isocyanate (PAPI) and the modified MDI prepolymer into a vacuum dispersion machine according to a proportion, uniformly mixing at a rotating speed of 300rpm, filling the mixed curing agent into a packaging barrel, filling nitrogen for protection, and tightly closing the sealing cover for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a further improvement, the silica micropowder used in step S3 is 400 mesh, and the iron oxide red powder is 325 mesh.
When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
The use effect is as follows: the polyol resin mainly containing soybean oil derivatives is used as a hydroxyl component, and the soybean oil is wide and rich in source, belongs to all natural renewable resources, is green and environment-friendly, and is not easily influenced by a single supplier to have large fluctuation. The timeliness of supply and the stability of cost price can be effectively guaranteed. Compared with common grease polyol resin which takes polyether as the main component, the tensile strength of a condensate is greatly improved by adopting the soybean oil polyol which takes polyester as the main component;
the diisopropyl naphthalene flexibilizer is used, so that the water resistance of the product can be improved while toughening is carried out. In addition, the tearing strength and the tensile strength of the product are further improved by selecting the diamine chain extender with lower reactivity, and a more appropriate working life (23 ℃, 30 minutes) can be obtained, so that the working life can ensure that the product has a longer leveling period and a better wetting time for a base material after blade coating to form good adhesive force, and meanwhile, the product also has faster curing time and early strength
Example 3
A solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: soybean oil polyester polyol (molecular weight 2500, hydroxyl value 330, functionality 5), soybean oil polyester polyol (molecular weight 1200, hydroxyl value 130, functionality 2.5), diisopropyl naphthalene, dispersant BYKP104, zeolite powder, silicon micropowder and iron oxide red powder.
In a further improvement, the raw materials are weighed according to the following weight percentage: 15% of soybean oil polyester polyol (molecular weight is 2500, hydroxyl value is 330, and functionality is 5), 40% of soybean oil polyester polyol (molecular weight is 1200, hydroxyl value is 130, and functionality is 2.5), 4% of diisopropylnaphthalene, 10% of zeolite powder, 1040.5% of dispersant BYKP, 29.5% of silicon micropowder, and 1% of iron oxide red powder.
In a further development, the curing agent comprises 50% of polymethylene polyphenyl isocyanate PAPI (NCO ═ 32%, functionality 2.7) and 50% of modified MDI prepolymer (NCO ═ 23%, functionality 2).
In a further improvement, the preparation method of the solvent-free polyurethane adhesive for colored pavement comprises the following steps:
s1: preparing a main agent: adding soybean oil polyester polyol (molecular weight 2500, hydroxyl value 330, functionality 5), soybean oil polyester polyol (molecular weight 1200, hydroxyl value 130, functionality 2.5), diisopropyl naphthalene and zeolite powder into a batching tank according to a proportion, and mixing at a rotating speed of 500rpm for 30min to obtain a mixed primary liquid;
s2: adding a dispersant BYKP104 into the mixed primary liquid obtained in the step S1, and continuously mixing at the rotation speed of 500rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the ferric oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1000rpm, sampling and testing the fineness, and obtaining a qualified main agent when the fineness is less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: sequentially adding polymethylene polyphenyl isocyanate (PAPI) and the modified MDI prepolymer into a vacuum dispersion machine according to a proportion, uniformly mixing at a rotating speed of 200rpm, filling the mixed curing agent into a packaging barrel, filling nitrogen for protection, and tightly closing the sealing cover for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a further improvement, the silica micropowder used in step S3 is 400 mesh, and the iron oxide red powder is 325 mesh.
When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
The use effect is as follows: the polyol resin mainly containing soybean oil derivatives is used as a hydroxyl component, and the soybean oil is wide and rich in source, belongs to all natural renewable resources, is green and environment-friendly, and is not easily influenced by a single supplier to have large fluctuation. The timeliness of supply and the stability of cost price can be effectively guaranteed. Compared with common grease polyol resin which takes polyether as the main component, the tensile strength of a condensate is greatly improved by adopting the soybean oil polyol which takes polyester as the main component;
the diisopropyl naphthalene flexibilizer is used, so that the water resistance of the product can be improved while toughening is carried out. In addition, the tearing strength and the tensile strength of the product are further improved by selecting the diamine chain extender with lower reactivity, and a more appropriate working life (23 ℃, 30 minutes) can be obtained, so that the working life can ensure that the product has a longer leveling period and a better wetting time for a base material after blade coating to form good adhesive force, and meanwhile, the product also has faster curing time and early strength
Example 4
A solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: dehydrated refined castor oil, castor oil derivative polyol resin (molecular weight is 1800, hydroxyl value is 190, and functionality is 2.7), petroleum resin, zeolite powder, dispersant BYKP104, silicon micropowder and iron oxide red powder.
In a further improvement, the raw materials are weighed according to the following weight percentage: 30% of dehydrated refined castor oil, 25% of castor oil derivative polyol resin (molecular weight is 1800, hydroxyl value is 190, and functionality is 2.7), 4% of petroleum resin, 10% of zeolite powder, 1040.5% of dispersant BYKP, 29.5% of silica micropowder and 1% of iron oxide red powder.
In a further improvement, the preparation method of the solvent-free polyurethane adhesive for colored pavement comprises the following steps:
s1: preparing a main agent: adding dehydrated refined castor oil, castor oil derivative polyol resin, petroleum resin and zeolite powder into a mixing tank in proportion, wherein the rotating speed is 600rpm, and the mixing time is 30min to obtain a mixed primary liquid;
s2: adding a dispersant BYKP104 into the mixed primary liquid obtained in the step S1, and continuously mixing at the rotation speed of 600rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the ferric oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1500rpm, sampling and testing the fineness, and obtaining a qualified main agent when the fineness is less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: the curing agent is polymethylene polyphenyl isocyanate (PAPI) (NCO is 32%, and the functionality is 2.7), and nitrogen is filled into a tank for packaging for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a further improvement, the silica micropowder used in step S3 is 400 mesh, and the iron oxide red powder is 325 mesh.
When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
The use effect is as follows: the castor oil polyalcohol has higher functionality, good hydrophobicity, proper reactivity and proper strength of a condensate; after curing, the paint has good water resistance and low-temperature flexibility retention rate. The product can keep the color aggregate on the road surface not to fall off for a long time after being applied, has good color consistency, no cracking phenomenon and good durability.
Example 5
A solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: dehydrated refined castor oil, castor oil derivative polyol resin (molecular weight is 1800, hydroxyl value is 190, and functionality is 2.7), petroleum resin, zeolite powder, dispersant BYKP104, silicon micropowder and iron oxide red powder.
In a further improvement, the raw materials are weighed according to the following weight percentage: 30% of dehydrated refined castor oil, 20% of castor oil derivative polyol resin (molecular weight is 1800, hydroxyl value is 190, and functionality is 2.7), 9% of petroleum resin, 10% of zeolite powder, 1040.5% of dispersant BYKP, 29.5% of silica micropowder and 1% of iron oxide red powder.
In a further improvement, the preparation method of the solvent-free polyurethane adhesive for colored pavement comprises the following steps:
s1: preparing a main agent: adding dehydrated refined castor oil, castor oil derivative polyol resin, petroleum resin and zeolite powder into a mixing tank in proportion, wherein the rotating speed is 500rpm, and the mixing time is 30min to obtain a mixed primary liquid;
s2: adding a dispersant BYKP104 into the mixed primary liquid obtained in the step S1, and continuously mixing at the rotation speed of 500rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the ferric oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1000rpm, sampling and testing the fineness, and obtaining a qualified main agent when the fineness is less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: the curing agent is polymethylene polyphenyl isocyanate (PAPI) (NCO is 32%, and the functionality is 2.7), and nitrogen is filled into a tank for packaging for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a further improvement, the silica micropowder used in step S3 is 400 mesh, and the iron oxide red powder is 325 mesh.
When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
The use effect is as follows: the castor oil polyalcohol has higher functionality, good hydrophobicity, proper reactivity and proper strength of a condensate; after curing, the paint has good water resistance and low-temperature flexibility retention rate. The product can keep the color aggregate on the road surface not to fall off for a long time after being applied, has good color consistency, no cracking phenomenon and good durability.
Example 6
A solvent-free polyurethane adhesive for colored pavements comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: dehydrated refined castor oil, castor oil derivative polyol resin (molecular weight is 1800, hydroxyl value is 190, and functionality is 2.7), zeolite powder, dispersant BYKP104, silicon micropowder and iron oxide red powder.
In a further improvement, the raw materials are weighed according to the following weight percentage: 40% of dehydrated refined castor oil, 15% of castor oil derivative polyol resin (molecular weight 1800, hydroxyl value 190 and functionality 2.7), 10% of zeolite powder, 1040.5% of dispersant BYKP, 29.5% of silica micropowder and 1% of iron oxide red powder.
In a further improvement, the preparation method of the solvent-free polyurethane adhesive for colored pavement comprises the following steps:
s1: preparing a main agent: adding dehydrated refined castor oil, castor oil derivative polyol resin and zeolite powder into a mixing tank in proportion, wherein the rotating speed is 550rpm, and the mixing time is 30min to obtain a mixed primary liquid;
s2: adding a dispersant BYKP104 into the mixed primary liquid obtained in the step S1, and continuously mixing at the rotation speed of 550rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the ferric oxide red powder and the S2 into a vacuum dispersion machine, performing vacuum dispersion for 30min at the rotating speed of 1250rpm, sampling and testing the fineness, and obtaining a qualified main agent when the fineness is less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: the curing agent is polymethylene polyphenyl isocyanate (PAPI) (NCO is 32%, and the functionality is 2.7), and nitrogen is filled into a tank for packaging for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
In a further improvement, the silica micropowder used in step S3 is 400 mesh, and the iron oxide red powder is 325 mesh.
When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
The use effect is as follows: the castor oil polyalcohol has higher functionality, good hydrophobicity, proper reactivity and proper strength of a condensate; after curing, the paint has good water resistance and low-temperature flexibility retention rate. The product can keep the color aggregate on the road surface not to fall off for a long time after being applied, has good color consistency, no cracking phenomenon and good durability.
Specifically, after the main agent and the curing agent prepared by the 6 experiments are uniformly mixed according to the proportion, the Shore hardness is tested according to the hardness of < GB/T2411-2008 plastic and hard rubber by using a durometer to determine the indentation hardness (Shore hardness) >; the tensile strength and the elongation at break are tested according to the determination of the tensile strength and the elongation at break of the porous elastic material of the high polymer of GB/T10654-2001 >; the concrete base material bonding strength is tested according to GB/T22374 and 2018 terrace paint, and detailed results are shown in the following table:
finally, 1# prepared in example 1 was selected as the use formula. When in use, the main agent and the curing agent are mixed according to a proportion and stirred evenly. And (3) coating the roughened pavement base material by scraping according to the dosage of 2-3 Kg/square meter, and then broadcasting the color ceramic aggregate (the Mohs hardness is more than or equal to 6) to the polyurethane adhesive coating. After curing, excess aggregate is recovered by a powerful dust collection facility, and a water-based polyurethane finishing coating is sprayed. The finishing coat can be used after being cured.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the 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 (5)
1. A solvent-free polyurethane binder for colored pavement, comprising: the curing agent comprises a main agent and a curing agent, wherein the main agent comprises the following raw materials: 15-24% of soybean oil polyester polyol (molecular weight is 2500, hydroxyl value is 330, and functionality is 5), 20-40% of soybean oil polyester polyol (molecular weight is 1200, hydroxyl value is 130, and functionality is 2.5), 0-1% of 1, 4-bis-sec-butyl aminobenzene, 4% of diisopropyl naphthalene, 1040.5% of dispersing agent BYKP, 10% of zeolite powder, 29.5% of silicon micropowder, and 1% of iron oxide red powder.
2. The solvent-free polyurethane binder for colored pavement according to claim 1, wherein: weighing the following raw materials in percentage by weight: 24% of soybean oil polyester polyol (molecular weight is 2500, hydroxyl value is 330, and functionality is 5), 30% of soybean oil polyester polyol (molecular weight is 1200, hydroxyl value is 130, and functionality is 2.5), 1, 4-bis-sec-butyl aminobenzene, 4% of diisopropyl naphthalene, 10% of zeolite powder, a dispersing agent BYKP1040.5, 29.5% of silicon micropowder, and 1% of iron oxide red powder.
3. The solvent-free polyurethane binder for colored pavement according to claim 1, wherein: the curing agent comprised 50% polymethylene polyphenyl isocyanate PAPI (NCO ═ 32%, functionality 2.7) and 50% modified MDI prepolymer (NCO ═ 23%, functionality 2).
4. A method for preparing a solvent-free polyurethane binder for colored pavement according to claims 1-3, wherein: the preparation method of the solvent-free polyurethane adhesive for the colored pavement comprises the following steps:
s1: preparing a main agent: adding soybean oil polyester polyol (molecular weight of 2500, hydroxyl value of 330 and functionality of 5), soybean oil polyester polyol (molecular weight of 1200, hydroxyl value of 130 and functionality of 2.5), diisopropyl naphthalene and zeolite powder into a batching tank according to a proportion, and mixing at a rotating speed of 500-600 rpm for 30min to obtain a mixed primary liquid;
s2: adding 1, 4-bis-sec-butylaminobenzene and a dispersant BYKP104 into the mixed primary liquid obtained in S1, and continuously mixing at the rotation speed of 500-600 rpm for 10min to obtain a mixed liquid;
s3: putting the mixed solution obtained from the silicon micro powder, the iron oxide red powder and the S2 into a vacuum dispersion machine, carrying out vacuum dispersion for 30min at the rotating speed of 1000-1500 rpm, sampling and testing the fineness, and obtaining a qualified main agent with the fineness of less than 60 mu m, and packaging for later use;
s4: preparing a curing agent: sequentially adding polymethylene polyphenyl isocyanate (PAPI) and the modified MDI prepolymer into a vacuum dispersion machine according to a proportion, uniformly mixing at a rotating speed of 200-300 rpm, filling the mixed curing agent into a packaging barrel, filling nitrogen for protection, and tightly closing the sealing cover for later use;
s5: and taking out the main agent and the curing agent, and mixing the main agent and the curing agent according to the proportion to obtain the solvent-free polyurethane adhesive.
5. The method for preparing the solvent-free polyurethane binder for colored pavement according to claim 4, wherein the method comprises the following steps: the silica micropowder used in step S3 was 400 mesh, and the iron oxide red powder was 325 mesh.
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| CN112143444A (en) * | 2020-10-22 | 2020-12-29 | 湖南太合科创生态有限公司 | High-water-resistance polyurethane adhesive |
| CN112226195A (en) * | 2020-10-22 | 2021-01-15 | 湖南太合科创生态有限公司 | Preparation method of polyurethane adhesive |
| CN112251187A (en) * | 2020-10-22 | 2021-01-22 | 湖南太合科创生态有限公司 | Double-component polyurethane |
| CN112500826A (en) * | 2020-10-23 | 2021-03-16 | 湖南太合科创生态有限公司 | Solvent-free polyurethane adhesive for colored pavement |
| CN114960333A (en) * | 2021-02-26 | 2022-08-30 | 南亚塑胶工业股份有限公司 | Method for laying road surface and polyurethane road surface coating |
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