CN113968955A - Filler-free polyurethane slurry, preparation method thereof and construction method of plastic ground - Google Patents
Filler-free polyurethane slurry, preparation method thereof and construction method of plastic ground Download PDFInfo
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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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
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- 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
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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
- C08K3/34—Silicon-containing compounds
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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
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
- E01C13/06—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003
- E01C13/065—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003 at least one in situ layer consisting of or including bitumen, rubber or plastics
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Polymers & Plastics (AREA)
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Abstract
The invention relates to a filler-free polyurethane slurry, a preparation method thereof and a construction method of a plastic field. The preparation method of the slurry comprises the following steps: (1) pouring polyether glycol and plasticizer into a kettle, stirring and heating; (2) adding the chain extender, the antioxidant and the auxiliary agent into a kettle and mixing; (3) and injecting the mixture into a special container for sealed storage. The powder filler comprises silicon powder or kaolin, talcum powder or calcium carbonate, a catalyst and a pigment. The construction method of the polyurethane plastic field comprises the following steps: (1) stirring and mixing the polyurethane prepolymer and the filler-free polyurethane slurry; (2) spreading the mixture by a special spreading machine; (3) and forming a plastic ground after curing. The polyurethane slurry does not contain powder filler, is added when being changed into a paving site, greatly improves the production efficiency, greatly reduces the energy consumption and the production cost, and simultaneously reduces the environmental pollution.
Description
Technical Field
The invention relates to the technical field of plastic sites, in particular to a polyurethane composite material for a plastic site, especially a filler-free polyurethane slurry for the plastic site, a preparation method of the filler-free polyurethane slurry, a plastic site construction method adopting the filler-free polyurethane slurry, and a premixed powder filler used in the plastic site construction.
Background
The existing polyurethane plastic field is generally made of bi-component polyurethane materials through casting and curing, and is mainly applied to sports stadiums and sports grounds, such as plastic track fields, tennis courts, volleyball courts, basketball courts and the like, and can also be used for pedestrian footpaths, anti-skidding roads and household plastic floors. The plastic ground and the ground paved by the polyurethane have good elasticity and skid resistance, can effectively protect athletes from being injured, and can be used in all weather. Meanwhile, the polyurethane material is convenient for adjusting colors randomly according to actual needs, so that the plastic ground is attractive and durable.
The two-component polyurethane material adopted by the plastic ground generally comprises a component A and a component B, wherein the component A is a polyurethane prepolymer, and the component B is a polyurethane slurry. The production and runway construction method of the existing bi-component polyurethane material is as follows: the production of the component A and the component B is firstly completed in a manufacturing factory, the components are respectively put into special packaging barrels for sealing storage, then the packaging barrels filled with the materials are conveyed to a plastic site, the component A and the component B are mixed according to the proportion during construction, a proper amount of catalyst is added for fully stirring, the components are spread on the construction site after being uniformly mixed, and a runway elastic layer is formed after solidification.
The traditional production method of the component B polyurethane slurry for the plastic ground mainly comprises the following steps: (1) pumping polyether polyol and a plasticizer into a mixing kettle, heating to about 80 ℃ while stirring, adding a chain extender, an antioxidant, a pigment and a powder filler (comprising talcum powder, calcium carbonate, kaolin and the like) into the mixing kettle in proportion, and mixing; (2) stirring the mixture, heating to 110 ℃ and vacuum degassing for 2-3 hours until the water content is reduced to 0.05%; (3) when the temperature of the mixture is reduced to below 80 ℃, the mixture is injected into a 200L iron bucket and sealed for storage.
The water content of the raw materials such as polyether polyol, plasticizer, chain extender and antioxidant used in the production process is low, the water content of the powder filler is high, and the step (2) is mainly used for removing the water content of the powder filler, which is a main process influencing the production period. Meanwhile, the addition of the powder filler in the production process of the component B is usually about 50%, strict operation is required during production, and various problems can occur if the operation is not proper, for example, powder in the formula amount needs to be added in multiple batches in the powder filler feeding stage, and if the powder filler is added into a kettle at one time, the material viscosity is too high, and even the stirring device of the reaction kettle is stopped; the powder needs to be dispersed and stirred at a high speed after being added in batches, and sometimes a grinding pump and other devices are used for assisting the dispersion of the powder, if the dispersion is not uniform, small aggregates are easily generated in the material, the viscosity of the material is obviously increased, and the problems of flow blockage, even valve blockage and the like can occur in the discharging stage.
Due to the reasons and the limitation of the construction technical equipment of the traditional polyurethane plastic field, the production of the double-component polyurethane needs to be completed in a factory by the raw material production and construction process of the traditional plastic field, wherein the adding, stirring, mixing and packaging treatment of the powder filler in the B-component polyurethane slurry are completed in the factory, so that the powder filler is prevented from being added and mixed in the construction site of the plastic field. Such raw material production and site construction modes are also fixed modes that have long been implemented throughout the industry.
And (3) after the component B of the polyurethane plastic field is produced, the component B enters a sealing and storing standby stage, and because the powder in the component B polyurethane slurry has higher density, the problem of barrel bottom hardening is easy to occur after the component B is stored for a period of time. The problem that site construction of a double-component polyurethane plastic field often encounters is that powder is difficult to disperse again after the barrel bottom is hardened, the original design proportion of the component A and the component B is influenced, and the performance of a plastic field product is obviously reduced due to more serious conditions.
When the bi-component polyurethane plastic field is constructed on site, the materials of the component A and the component B are mixed according to the proportion, then a proper amount of catalyst is added, the mixture is stirred and mixed evenly and then spread on the construction field, and the runway elastic layer is formed after curing. Because the component B of the polyurethane plastic field prepared by the traditional method contains a large amount of powder and pigment and has high viscosity, 2-10 kg of wall-hanging materials can remain in a 200L packaging iron bucket after the materials are poured out, and the wall-hanging materials are difficult to clean. Therefore, on one hand, 0.8-4% of the component B material is wasted, and on the other hand, the component B packaging iron barrel cannot be recycled due to the wall-hanging material containing powder and pigment.
At present, each ton of the B component material needs 4 packaging iron buckets with 200 liters, each iron bucket is sold with the price of about 140 yuan, and the used iron buckets are generally treated by cutting and calcining after being recycled at low price by iron bucket manufacturers. The number of the B component packaging iron barrels in the domestic polyurethane plastic field is up to millions, the waste amount of the B component packaging iron barrels is up to 5000 tons calculated according to 5 kilograms of wall-hanging materials of each iron barrel, and the direct cost loss caused by the fact that the packaging iron barrels cannot be recycled is up to one hundred million, four thousand and ten thousand yuan. Meanwhile, the cutting and calcining treatment of the recycled packaging iron drum consumes a large amount of labor and energy, and can cause environmental pollution if the treatment is improper.
With the technical progress of modern road construction mechanical equipment and the development of automatic control technical equipment, the production method of the traditional polyurethane plastic field raw materials and the problems in the plastic field construction process are worthy of research and improvement.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a polyurethane composition for a plastic field, particularly a filler-free polyurethane slurry for a plastic field, a method for preparing the filler-free polyurethane slurry, a method for constructing a plastic field using the filler-free polyurethane slurry, and a pre-mixed powder filler used in the construction of the plastic field.
The purpose of the invention is realized by adopting the following technical scheme:
the polyurethane composite material for the plastic ground comprises a polyurethane prepolymer and filler-free polyurethane slurry, wherein the polyurethane slurry does not contain powder filler, and the filler-free polyurethane slurry comprises the following components in percentage by mass:
the balance of auxiliary agent.
As a preferred technical scheme of the invention, the auxiliary agent comprises a dispersing agent and a defoaming agent, and the mass percentage of each component of the auxiliary agent in the non-filler polyurethane slurry is as follows:
0.1 to 0.3 percent of dispersant
0.1 to 0.5 percent of defoaming agent.
A preparation method of filler-free polyurethane slurry for a plastic ground comprises the following steps:
(1) injecting polyether polyol and a plasticizer into a mixing kettle, stirring and heating to 70-90 ℃;
(2) adding the chain extender, the antioxidant and the auxiliary agent into a mixing kettle in proportion, mixing with the mixture obtained in the step (1), stirring and heating to 100-110 ℃, and stirring for 15-45 minutes;
(3) and (3) when the temperature of the mixture obtained in the step (2) is reduced to be below 80 ℃, injecting the mixture into a special container, and storing in a sealed mode.
As a preferred technical scheme of the invention, the special container in the step (3) comprises a sealed barrel of 20-1000 liters.
As a preferred technical scheme of the invention, the sealing barrel comprises an iron barrel and a plastic barrel.
The powder filler for the polyurethane plastic field comprises the following components in percentage by mass:
and stirring and mixing the components of the powder filler by a high-speed stirrer, and fully and uniformly stirring to obtain a finished product of the powder filler.
As a preferred technical scheme of the invention, the powder filler is formed by mixing silicon powder, talcum powder, catalyst and pigment, and a finished product of the powder filler is obtained and then weighed and packaged; the silicon powder is nano-scale silicon dioxide, and the talcum powder comprises talcum powder with the granularity of 400 meshes to 800 meshes.
A construction method of a polyurethane plastic field comprises the following steps:
(1) in a construction site of a plastic field, putting a polyurethane prepolymer and filler-free polyurethane slurry into a stirrer according to a formula ratio, stirring and mixing, uniformly mixing to form mixed slurry, adding a powder filler in a formula amount, and uniformly stirring;
(2) pouring the mixture obtained in the step (1) into a special paving machine, and paving on a construction site according to the thickness requirement of a working surface of a plastic site;
(3) and forming the elastic layer of the plastic field after the spreading material is solidified.
In a preferred embodiment of the present invention, the mass ratio of the amount of the powder filler added in the step (1) to the mixed slurry is 1-2.5: 1.
As the preferable technical scheme of the invention, the step (3) further comprises a process of spraying an anti-slip layer on the surface of the elastic layer of the plastic ground or embossing.
The invention has the beneficial effects that: compared with the prior art, the polyurethane liquid slurry of the polyurethane composite material does not contain powder filler, and the powder filler is added on the site where a plastic ground is paved. The production efficiency of the filler-free polyurethane slurry can be improved by over 50 percent, and a large amount of labor and energy consumption cost can be saved.
The polyurethane slurry finished product does not contain powder filler, the storage period is greatly prolonged, the polyurethane slurry can be normally used after being stored for more than one year, and the problem of overdue failure of materials caused by powder hardening does not exist; the shelf life of the two-component polyurethane B prepared by the traditional production method is generally within 6 months, and the problem of powder hardening can occur after the shelf life is prolonged.
The powder filler obtained by mixing according to the formula in advance is used during construction of the plastic field, and the finished product of the powder filler is weighed and packaged, so that the feeding operation of the plastic field construction field is facilitated, the operation difficulty is reduced, the operation steps are simplified, and errors are avoided, thereby improving the construction quality and the convenience of operation.
When the polyurethane plastic field is constructed on site, because the polyurethane slurry does not contain powder filler, the viscosity is lower, the residual materials in the packaging barrel are less, the wall built-up residual quantity in each 200L packaging barrel is lower than 1 kg, and compared with the traditional method, the waste of materials of 1-9 kg is reduced for each barrel; residual materials in the packaging barrel are not solidified and volatilized, the packaging barrel can be recycled and reused after construction is finished, and 600 yuan of packaging cost can be saved for each ton of materials.
The viscosity of the filler-free polyurethane material prepared by the invention is lower after mixing, and the amount of the powder filler added in the field construction of the plastic field can be larger than that of the traditional method. In site construction, the problems of powder sedimentation and the like do not need to be considered, and the technical requirements on the operations of adding, stirring and mixing the powder filler are correspondingly reduced, so that the construction difficulty and the raw material cost are reduced.
When the traditional bi-component polyurethane plastic field is constructed, the addition amount of the filler can not be adjusted when in site construction because the powder filler is already added into the component B. When the polyurethane plastic field is constructed on site, the addition amount of the powder filler can be flexibly adjusted according to the technical indexes of raw materials, the environmental factors of temperature, humidity and the like of the construction site, so that the laying construction quality and the product quality of the plastic field can be further improved.
Detailed Description
The invention will be further illustrated with reference to specific examples:
the polyether polyol is DL2000 and EP-330N produced by Shandong Lanxingdao Co.
The plasticizer is selected from No. 52 environment-friendly chlorinated paraffin or acetyl tributyl citrate produced by Yongyi environmental protection science and technology Limited company in Changzhou, or the No. 52 environment-friendly chlorinated paraffin and the acetyl tributyl citrate are used together.
The chain extender is II type MOCA produced by Suzhou Xiangyuan New materials GmbH.
The antioxidant is RIANOX 1010 or RIANOX 1135R produced by Tianjin Lianlong New Material GmbH.
The dispersant is selected from Pick BYK-106 produced by Kyowa Kayin chemical Co.
Example one
A polyurethane composite material for a plastic ground comprises a polyurethane prepolymer and a filler-free polyurethane slurry, wherein the polyurethane slurry does not contain a powder filler, and the filler-free polyurethane slurry comprises the following components in percentage by mass:
the balance of auxiliary agent; the auxiliary agent comprises a dispersing agent and a defoaming agent, and the mass percentage of each component of the auxiliary agent in the non-filler polyurethane slurry is as follows:
0.1 to 0.3 percent of dispersant
0.1 to 0.5 percent of defoaming agent.
In the embodiment, the polyurethane prepolymer is prepared by a traditional method, the raw materials comprise No. 52 environment-friendly chlorinated paraffin, polyether polyol EP-330N, polyether polyol DL2000 and isocyanate MDI-50, the viscosity range of the prepared material is 3000-5000mPa & s, and the NCO content is 6.8 +/-0.2%.
Example two
A preparation method of filler-free polyurethane slurry for a plastic ground comprises the following steps:
(1) injecting polyether polyol and a plasticizer into a mixing kettle, stirring and heating to 70-90 ℃;
(2) adding the chain extender, the antioxidant and the auxiliary agent into a mixing kettle in proportion, mixing with the mixture obtained in the step (1), stirring and heating to 100-110 ℃, and stirring for 15-45 minutes;
(3) and (3) when the temperature of the mixture obtained in the step (2) is reduced to be below 80 ℃, injecting the mixture into a special container, and storing in a sealed mode.
The special container in the step (3) comprises a sealed barrel with the volume of 20-1000 liters. In this embodiment, the sealing barrel includes an iron barrel and a plastic barrel.
EXAMPLE III
A polyurethane composite material for a plastic ground comprises a polyurethane prepolymer and a filler-free polyurethane slurry, wherein the preparation method of the filler-free polyurethane slurry comprises the following steps:
pumping 24 parts (by mass) of polyether polyol EP-330N, 10 parts of polyether polyol DL2000, 20 parts of acetyl tributyl citrate and 40 parts of No. 52 environment-friendly chlorinated paraffin into a mixing kettle, heating to about 80 ℃ while stirring, then adding 5 parts of MOCA and 1 part of antioxidant 1010, mixing, stirring and heating to 100-110 ℃, stirring for half an hour, cooling to below 80 ℃, discharging to a 200-liter iron bucket, sealing, and marking for later use.
In the embodiment, the polyurethane prepolymer is prepared by a traditional method, the raw materials comprise No. 52 environment-friendly chlorinated paraffin, polyether polyol EP-330N, polyether polyol DL2000 and isocyanate MDI-50, the viscosity range of the prepared material is 3000-5000mPa & s, and the NCO content is 6.8 +/-0.2%.
Example four
The powder filler for the polyurethane plastic field comprises silicon powder or kaolin, talcum powder or calcium carbonate, a catalyst and pigment, and the powder filler comprises the following components in percentage by mass:
in this embodiment, the powder filler is formed by mixing silica powder, talc powder, a catalyst and a pigment, the silica powder is nano-silica, and the talc powder includes talc powder with a particle size of 400 to 800 meshes.
Stirring and mixing the components of the powder filler by a high-speed stirrer, fully and uniformly stirring to obtain a finished powder filler product, and weighing and packaging the finished powder filler product.
EXAMPLE five
A powder filler for a polyurethane plastic field is prepared by mixing silicon powder, talcum powder, a catalyst and a pigment, wherein the silicon powder is nano-scale silicon dioxide, the talcum powder comprises the talcum powder with the granularity of 600 meshes to 800 meshes, and the powder filler comprises the following components in percentage by mass: 35% of silicon powder, 60% of talcum powder, 4.5% of pigment and 0.5% of catalyst.
Stirring and mixing the components of the powder filler by a high-speed stirrer, fully and uniformly stirring to obtain a finished powder filler product, and weighing and packaging the finished powder filler product.
EXAMPLE six
A construction method of a polyurethane plastic field comprises the following steps:
(1) in a construction site of a plastic field, putting a polyurethane prepolymer and filler-free polyurethane slurry into a stirrer according to a formula ratio, stirring and mixing, uniformly mixing to form mixed slurry, adding a powder filler in a formula amount, and uniformly stirring;
(2) pouring the mixture obtained in the step (1) into a special paving machine, and paving on a construction site according to the thickness requirement of a working surface of a plastic site;
(3) and forming the elastic layer of the plastic field after the spreading material is solidified.
In this example, the powder filler used in the step (1) was the powder filler produced in example five, and the mass ratio of the amount of the powder filler added to the mixed slurry was 1-2.5: 1. And (3) spraying an anti-slip layer on the surface of the elastic layer of the plastic ground or embossing.
EXAMPLE seven
A construction method of a polyurethane plastic field comprises the following steps:
(1) when the site material on-site construction of the polyurethane plastic field is carried out, the polyurethane prepolymer and the filler-free polyurethane slurry are mixed and stirred for 1 minute in a mixing barrel by using a high-speed dispersion machine according to the mass ratio of 1: 5, and then powder fillers with the same mass as the filler-free polyurethane slurry are added and stirred continuously;
(2) after being uniformly mixed, the mixture is spread and leveled in a construction site, and the spread material is solidified to form an elastic layer of the plastic site.
In this example, the powder filler was prepared by mixing 93% by mass of 400 mesh talc powder, 5% by mass of silicon powder, 1.5% by mass of iron oxide red pigment, and 0.5% by mass of zinc bismuth catalyst, and was stirred for 2 minutes or more using a high-speed disperser.
The above examples are only for illustrating the concept and technical features of the present invention, and are intended to enable those skilled in the art to understand the technical scheme and implementation manner of the present invention, and the protection scope of the present invention is not limited thereby. All equivalents and changes equivalent to the technical solution of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A polyurethane composite material for plastic ground is characterized in that: the composite material comprises a polyurethane prepolymer and filler-free polyurethane slurry, wherein the polyurethane slurry does not contain powder filler, and the filler-free polyurethane slurry comprises the following components in percentage by mass:
2. the polyurethane composition for plastic cement fields as claimed in claim 1, wherein: the auxiliary agent comprises a dispersing agent and a defoaming agent, and the mass percentage of each component of the auxiliary agent in the non-filler polyurethane slurry is as follows:
0.1 to 0.3 percent of dispersant
0.1 to 0.5 percent of defoaming agent.
3. A preparation method of non-filler polyurethane slurry for plastic ground is characterized by comprising the following steps:
(1) injecting polyether polyol and a plasticizer into a mixing kettle, stirring and heating to 70-90 ℃;
(2) adding the chain extender, the antioxidant and the auxiliary agent into a mixing kettle in proportion, mixing with the mixture obtained in the step (1), stirring and heating to 100-110 ℃, and stirring for 15-45 minutes;
(3) and (3) when the temperature of the mixture obtained in the step (2) is reduced to be below 80 ℃, injecting the mixture into a special container, and storing in a sealed mode.
4. The method for preparing the filler-free polyurethane slurry for the plastic ground, according to claim 3, is characterized in that: the special container in the step (3) comprises a sealed barrel with the volume of 20-1000 liters.
5. The method for preparing the filler-free polyurethane slurry for the plastic ground, according to claim 4, is characterized in that: the sealing barrel comprises an iron barrel and a plastic barrel.
6. A powder filler for a polyurethane plastic field is characterized in that: the powder filler comprises silicon powder or kaolin, talcum powder or calcium carbonate, a catalyst and a pigment, and the powder filler comprises the following components in percentage by mass:
and stirring and mixing the components of the powder filler by a high-speed stirrer, and fully and uniformly stirring to obtain a finished product of the powder filler.
7. The powder filling for polyurethane plastic yard as claimed in claim 6, wherein: the powder filler is formed by mixing silicon powder, talcum powder, catalyst and pigment, and a finished powder filler product is obtained and then weighed and packaged; the silicon powder is nano-scale silicon dioxide, and the talcum powder comprises talcum powder with the granularity of 400 meshes to 800 meshes.
8. A construction method of a polyurethane plastic field is characterized by comprising the following steps:
(1) in a construction site of a plastic field, putting a polyurethane prepolymer and filler-free polyurethane slurry into a stirrer according to a formula ratio, stirring and mixing, uniformly mixing to form mixed slurry, adding a powder filler in a formula amount, and uniformly stirring;
(2) pouring the mixture obtained in the step (1) into a special paving machine, and paving on a construction site according to the thickness requirement of a working surface of a plastic site;
(3) and forming the elastic layer of the plastic field after the spreading material is solidified.
9. The method of constructing a polyurethane plastic yard as claimed in claim 8, wherein: the mass ratio of the addition amount of the powder filler in the step (1) to the mixed slurry is 1-2.5: 1.
10. The method of constructing a polyurethane plastic yard as claimed in claim 8, wherein: and (3) spraying an anti-slip layer on the surface of the elastic layer of the plastic ground or embossing.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001247644A (en) * | 2000-03-08 | 2001-09-11 | Mitsui Chemicals Inc | Polyurethane binder and elastic pavement material prepared therewith |
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