CN114933885A - Breathable environment-friendly high-performance plastic track bottom layer and preparation method thereof - Google Patents
Breathable environment-friendly high-performance plastic track bottom layer and preparation method thereof Download PDFInfo
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- CN114933885A CN114933885A CN202210638218.4A CN202210638218A CN114933885A CN 114933885 A CN114933885 A CN 114933885A CN 202210638218 A CN202210638218 A CN 202210638218A CN 114933885 A CN114933885 A CN 114933885A
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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
- C09J175/08—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
- 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
- C09J11/08—Macromolecular additives
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
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Abstract
The invention discloses a breathable environment-friendly high-performance plastic track bottom layer, which is composed of the following raw materials: (a) at least one-component moisture-cure silicon-containing polyurethane adhesive; (b) at least one ethylene propylene diene monomer particle; (c) at least one polyether siloxane wetting agent; (d) at least one supercritical carbon dioxide foamed thermoplastic polyurethane, wherein the surface tension of an aqueous solution of component (c) at a mass concentration of 0.5% is less than or equal to 25 mN/m. The breathable environment-friendly high-performance plastic runway bottom layer prepared by the invention is used for a mixed runway bottom layer by replacing EPDM (ethylene-propylene-diene monomer) particles with part of E-TPU particles, the mixed runway has better impact absorption performance and low vertical deformation performance due to the high elasticity of the E-TPU particles, and the problem of difficult dispersion of the E-TPU in a system is solved by adding the polyether siloxane wetting agent.
Description
Technical Field
The invention belongs to the technical field of plastic runways, and particularly relates to a breathable environment-friendly high-performance plastic runway bottom layer and a preparation method thereof.
Background
Along with the rapid economic development of China, official racetracks in China are continuously upgraded, even the official racetracks made of traditional cinder are replaced by polyurethane plastic runways, and the polyurethane plastic runways are applied to floor paving materials of competition fields due to the advantages of good elasticity, wear resistance, aging resistance and the like.
The polyurethane plastic track mainly comprises an all-plastic track, a mixed track and a breathable track, wherein the breathable plastic track is formed by paving and solidifying a polyurethane adhesive and more Ethylene Propylene Diene Monomer (EPDM) particles after mixing, has the characteristics of low relative price and breathability, and is particularly suitable for regions with much rainwater in the south. The new national standard GB 36246-2018 not only improves the physical performance requirements of the breathable runway, but also improves the chemical detection of the polyurethane glue and the performance requirements of the EPDM particles, so that the concern of the breathable runway to meet the new national standard becomes a key point of attention of people.
The thermoplastic polyurethane (E-TPU) particles foamed by the supercritical carbon dioxide are nontoxic and tasteless, and have the characteristics of higher specific strength, wear resistance, shock absorption, portability, comfort, high resilience and the like. However, in the application process of the E-TPU granules to the plastic track, a plurality of problems are exposed, so that the application and popularization of the E-TPU plastic track are limited to a certain extent. Chinese patent CN107254821A discloses a thermoplastic polyurethane foam sports ground, which is a double-layer structure: a bottom layer and a top layer; the surface layer is formed by spraying breathable slurry doped with EPDM particles. Although the sports ground has good elasticity, impact absorption and moderate elasticity and rebound force, the sports ground is easy to delaminate and has short service life because the thermoplastic polyurethane foaming particles and the EPDM particles are on different layers.
As various factors can influence the construction quality in the construction process, the site physical performance indexes can not meet the standards, and the main indexes comprise impact absorption, vertical deformation, tensile strength, elongation at break and the like. Firstly, the density of E-TPU particles is low, the E-TPU particles float when being mixed with polyurethane glue, the E-TPU particles are not easy to be mixed uniformly, glue viscosity is required to be adjusted by a glue manufacturer to adapt to the characteristic of ultra-light particles, the glue viscosity is low, the elastic particles are easy to disperse, if the viscosity is too low, the glue can be deposited on a lower layer after being laid, the E-TPU particles float upwards, and the bonding strength of the polyurethane glue to the elastic particles is influenced due to the fact that the coating amount of the glue on the particles on the upper layer is insufficient; too high a glue viscosity can cause difficulties in dispersion or even failure to disperse uniformly. Secondly, the ultra-light characteristic of the E-TPU granules also puts forward a new requirement on the stirring equipment of a construction site, the originally used horizontal concrete mixer is easy to scatter the granules outside the machine, and the common vertical mixer for mixing EPDM can form a bulk shape to roll along with the stirring paddle due to the low rotating speed, so that the dispersion is difficult. Thirdly, when the breathable bottom layer is constructed, the high-elasticity E-TPU particles are not easy to be patted and tightly patted manually, the original plastic track paver is adopted for mechanical paving, the lighter E-TPU particles can be pushed by a mechanical scraper to be piled and roll forwards, and paving and compaction cannot be realized, so that manual paving with low efficiency is basically adopted at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a breathable environment-friendly high-performance plastic track bottom layer and a preparation method thereof, which aim to solve the problem that the bonding strength of polyurethane glue to elastic particles is affected due to the fact that particles on the upper layer are not enough to be coated by glue water because an E-TPU material is low in density and easy to float upwards, solve the problem that the E-TPU material is difficult to disperse in a stirring machine due to low rotating speed, and solve the problem that light E-TPU particles are pushed by a mechanical scraper to be piled to roll forwards and cannot be paved and compacted in the construction process.
In order to achieve the purpose, the invention provides the following technical scheme:
the bottom layer of the breathable environment-friendly high-performance plastic track is composed of the following raw materials:
(a) at least one-component moisture-cure silicon-containing polyurethane adhesive;
(b) at least one ethylene propylene diene monomer particle;
(c) at least one polyether siloxane wetting agent;
(d) at least one supercritical carbon dioxide foamed thermoplastic polyurethane;
wherein the surface tension of the water solution of the polyether type siloxane wetting agent with the mass concentration of 0.5 percent is less than or equal to 25 mN/m.
Preferably, the (a) component is 10-15 parts by weight, and the (b) component is 50-80 parts by weight; (c) 0.1 to 0.5 portion of component (d) and 10 to 20 portions of component (d).
Preferably, the preparation method of the (a) component is as follows:
s1, preparation of organosilicon precursor a: adding aminopropyl trimethoxy silane and tertiary carboxylic acid glycidyl ester into a flask, and stirring to react under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding polyether polyol into a three-neck flask, heating to the temperature of 100-120 ℃, dehydrating for 1-2h under a vacuum condition, then cooling to the temperature below 40 ℃, then adding polyisocyanate and a catalyst, uniformly stirring, introducing nitrogen, heating to the temperature of 40-100 ℃, preserving heat for 1-3h, after the NCO of a test system is reduced to a theoretical value, then adding the organic silicon precursor a obtained in the step S1, and continuously preserving heat until the NCO is completely reacted to obtain the single-component moisture-curing silicon-containing polyurethane adhesive.
Preferably, the molar ratio of aminopropyltrimethoxysilane to glycidyl versatate in the step S1 is 1: 1.05-2; the stirring reaction temperature is 20-40 ℃, and the stirring time is 3-6 h.
According to the polyurethane adhesive prepared by the invention, a novel chain extender is obtained by performing addition reaction on aminopropyl trimethoxy siloxane and glycidyl versatate, primary amine is converted into secondary amine, hydrophobic high-steric-hindrance tertiary carbonate is introduced, the reactivity of the tertiary carbonate is reduced, and the tolerance of trimethyl siloxane groups to water in the air is obviously improved in a tertiary carbonate molecular environment with strong hydrophobicity, so that the prepared adhesive has moderate viscosity and good stability.
Preferably, the polyether polyol in step S2 is 150-250 parts, the polyisocyanate is 20-40 parts, the catalyst is 0.3-0.8 part, and the organosilicon precursor a is 2-6 parts.
The polyether polyol and the polyisocyanate compound added in the adhesive can effectively adjust and control the viscosity and the content of isocyanate groups of the adhesive, and the content of the effective functional groups of the polyisocyanate is high, so that the adhesive and an adherend are favorably chemically bonded to form a network structure with high crosslinking density, and the adhesive has excellent bonding performance.
Preferably, the viscosity of the (a) component is 4500-.
The single-component moisture-curing silicon-containing polyurethane adhesive prepared by the invention has moderate viscosity, does not generate cross linking in the reaction process, has good stability and is suitable for dispersing low-density E-TPU particles.
Preferably, the average particle size of the component (b) is 2-4mm, and the gel content is 8-25%.
The rubber content of the EPDM particles added in the invention is increased, the elasticity of the particles is better, the hardness is relatively lower, the hardness and the elasticity of the product are better, the impact absorption is higher, but the vertical deformation is larger, and the rubber content is selected to ensure that the mixed track has better impact absorption performance and low vertical deformation performance.
The particle size of the EPDM particles selected by the invention is 2-4mm, so that the rubber runway can achieve better compactness, and the particle size is too large and the compactness is poor; the particle size is too small, the specific surface area is too large, the bonding strength is reduced under the condition of the same glue using amount, and the phenomena of bubbling and the like are easy to occur.
Preferably, the component (c) is one or more of polyether modified polydimethylsiloxane and polyether modified heptamethyl trisiloxane.
The polyether siloxane wetting agent added in the invention enables amphiphilic polymers to be attached to the surfaces of the E-TPU particles, and meanwhile, the surface tension of the polyether siloxane wetting agent is moderate, so that the E-TPU particles are easy to wet by glue, the E-TPU particles are more stable in a system, and the polyether siloxane wetting agent is beneficial to construction.
Preferably, the density of the (d) component is 0.15 to 0.30g/cm 3 The average grain diameter is 2-4mm, the rebound resilience is 45-60%, and the compression set is 5-20%.
The E-TPU particles added in the invention are nontoxic and tasteless, have higher specific strength, wear resistance, shock absorption, portability, comfort and high resilience, and can be used for the plastic track to ensure that the track structure has excellent tensile strength and extensibility, super toughness and higher resilience, can well absorb impact force and provide good protection for athletes.
The invention also provides a preparation method of the breathable environment-friendly high-performance plastic track bottom layer, which comprises the following steps:
adding the single-component moisture-curing silicon-containing polyurethane adhesive and the thermoplastic polyurethane foamed by supercritical carbon dioxide into a stirrer according to the proportion, then adding the ethylene propylene diene monomer rubber particles and the polyether siloxane wetting agent, uniformly mixing and stirring, then pouring into a mould, compacting, standing at room temperature for 24 hours, demoulding, and curing at 60-70 ℃ and 50-60% relative humidity for 24 hours to obtain the bottom layer of the breathable environment-friendly high-performance plastic track.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the breathable environment-friendly high-performance plastic runway bottom layer prepared by the invention, part of E-TPU particles are used for replacing EPDM particles and are used for the mixed type runway bottom layer, and the E-TPU particles are used for the plastic runway, so that the runway structure has excellent tensile strength and extensibility, super-strong toughness and higher rebound resilience, can well absorb impact force and provide good protection for athletes; meanwhile, the closed-cell granular foam has extremely low water absorption rate, is particularly suitable for outdoor sports grounds in rainy areas, can keep more than 10 years, and can simultaneously reduce the specific gravity of the plastic track and the rubber consumption of the track per unit volume.
(2) According to the bottom layer of the breathable environment-friendly high-performance plastic track, the polyether siloxane wetting agent is added, wherein polyether is a hydrophilic substance, siloxane is a hydrophobic substance, so that amphiphilic polymers are attached to the surfaces of E-TPU particles, the surface tension of the E-TPU particles is moderate, glue is easy to wet the E-TPU particles, the problem that the bonding strength of polyurethane glue to elastic particles is affected due to the fact that the particles on the upper layer are not enough to be coated by the glue because the E-TPU material is low in density and easy to float is solved, and the problem that the E-TPU material is difficult to disperse in a stirrer due to the fact that the rotating speed is low is also solved; and the E-TPU particles are uniformly dispersed in the glue solution, the wetting agent is arranged on the surface of the glue solution, and the glue solution cannot be agglomerated or covered on a mechanical scraper, so that the problem that the spreading and compaction cannot be realized because the lighter E-TPU particles are pushed by the mechanical scraper to be piled and roll forward in the construction process is solved.
(3) The bottom layer of the breathable environment-friendly high-performance plastic track prepared by the invention has good elasticity, absorbs impact force, has moderate elasticity and rebound force, can reduce physical consumption, properly absorbs foot impact force, reduces sports injury and has good permanent deformation performance when applied to sports grounds.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The polyether glycol is purchased from the Dow chemical company, the model is Voranol 1000LM, and the hydroxyl value is 112 mgKOH/g; the polyether triol is available from the Dow chemical company, Voranol 2471LM, and has a hydroxyl value of 34 mgKOH/g; the aminopropyl trimethoxy siloxane is purchased from Wuda organic silicon new materials GmbH in Hubei, and has the brand of WD-56; the tertiary carbonic acid glycidyl ester is purchased from Nanjing Hui Zhen trade company, manufactured by American Mei Tu company, and has the brand number of Cardura E-10P; the HDI trimer is purchased from Wanhua chemical Co., Ltd, and the mark is HT-100; MDI-50 is purchased from Van Waals chemical Co., Ltd; the isophorone diisocyanate tripolymer is produced by Germany bayer company, and the brand is Desmodur Z4470; the polyether modified polydimethylsiloxane is produced by Germany Bike company and has the mark of BYK 333; the ethylene propylene diene monomer rubber particles are purchased from Nantong Tongjiang rubber products, Co.Ltd; the polyether modified heptamethyltrisiloxane is purchased from Hubei Hendada Biotech, Inc.; the supercritical carbon dioxide foamed thermoplastic polyurethane is basf
Series; the NCO content was determined according to method A of the national Standard GB 12009.4-2016.
Example 1
A preparation method of a breathable environment-friendly high-performance plastic track bottom layer comprises the following steps:
100g of single-component moisture-curing silicon-containing polyurethane adhesive and 100g of thermoplastic polyurethane foamed by supercritical carbon dioxide are added into a stirrer according to the proportion, then 500g of ethylene propylene diene monomer particles and 1g of polyether modified polydimethylsiloxane are added, the mixture is uniformly mixed and stirred, then the mixture is poured into a mold, the mold is compacted, the mixture is placed for 24 hours at room temperature, and the mold is demoulded and cured for 24 hours at the temperature of 60 ℃ and the relative humidity of 50 percent, so that the breathable environment-friendly high-performance plastic track bottom layer is obtained.
The preparation method of the single-component moisture-curing silicon-containing polyurethane adhesive comprises the following steps:
s1, preparation of organosilicon precursor a: adding 1mol of aminopropyltrimethoxysilane and 1.05mol of glycidyl versatate into a flask, and stirring and reacting for 6 hours at the temperature of 20 ℃ under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding 150g of polyether glycol into a three-neck flask, heating to 100 ℃, dehydrating for 2h under a vacuum condition, then cooling to 25 ℃, then adding 20g of HDI tripolymer, 10g of MDI-50 and 0.3g of stannous isooctanoate, uniformly stirring, introducing nitrogen, then heating to 40 ℃, keeping the temperature for 3h, after the NCO of a test system is reduced to a theoretical value, then adding 2g of the organic silicon precursor a obtained in the step S1, and continuing to keep the temperature until the NCO is completely reacted, thus obtaining the single-component moisture-cured silicon-containing polyurethane adhesive.
The surface tension of the aqueous solution (mass concentration of 0.5%) of the polyether-modified polydimethylsiloxane was 25 mN/m.
The density of the thermoplastic polyurethane foamed by the supercritical carbon dioxide is 0.15g/cm 3 The average particle diameter was 2mm, the spring back rate was 60%, and the compression set was 20%.
The average grain diameter of the ethylene propylene diene monomer particles is 2mm, and the rubber content is 10%.
Example 2
A preparation method of a breathable environment-friendly high-performance plastic track bottom layer comprises the following steps:
adding 110g of single-component moisture-curing silicon-containing polyurethane adhesive and 130g of thermoplastic polyurethane foamed by supercritical carbon dioxide into a stirrer according to a ratio, then adding 600g of ethylene propylene diene monomer particles and 2g of polyether modified heptamethyltrisiloxane, uniformly mixing and stirring, then pouring into a mold, compacting, standing at room temperature for 24 hours, demolding, and curing at 65 ℃ and 55% relative humidity for 24 hours to obtain the breathable environment-friendly high-performance plastic track bottom layer.
The preparation method of the single-component moisture-curing silicon-containing polyurethane adhesive comprises the following steps:
s1, preparation of organosilicon precursor a: adding 1mol of aminopropyltrimethoxysilane and 1.3mol of glycidyl versatate into a flask, and stirring and reacting for 5 hours at the temperature of 30 ℃ under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding 200g of polyether triol into a three-neck flask, heating to 110 ℃, dehydrating for 2h under a vacuum condition, then cooling to 30 ℃, then adding 20g of isophorone diisocyanate trimer, 10g of MDI-50 and 0.5g of stannous isooctanoate, stirring uniformly, introducing nitrogen, heating to 60 ℃, keeping the temperature for 2h, after the NCO of a test system is reduced to a theoretical value, then adding 4g of the organic silicon precursor a obtained in the step S1, and keeping the temperature until the NCO is completely reacted to obtain the single-component moisture-curing silicon-containing polyurethane adhesive.
The surface tension of the aqueous solution (mass concentration of 0.5%) of the polyether-modified heptamethyltrisiloxane was 20 mN/m.
The density of the thermoplastic polyurethane foamed by the supercritical carbon dioxide is 0.2g/cm 3 The average particle diameter was 3mm, the spring back rate was 55%, and the compression set was 15%.
The average particle size of the ethylene propylene diene monomer particles is 3mm, and the rubber content is 15%.
Example 3
A preparation method of a breathable environment-friendly high-performance plastic track bottom layer comprises the following steps:
adding 130g of single-component moisture-curing silicon-containing polyurethane adhesive and 170g of thermoplastic polyurethane foamed by supercritical carbon dioxide into a stirrer according to a ratio, then adding 700g of ethylene propylene diene monomer particles and 3.5g of polyether modified polydimethylsiloxane, uniformly mixing and stirring, then pouring into a mold, compacting, standing at room temperature for 24 hours, demolding, and curing at 65 ℃ and 55% relative humidity for 24 hours to obtain the breathable environment-friendly high-performance plastic track bottom layer.
The preparation method of the single-component moisture-curing silicon-containing polyurethane adhesive comprises the following steps:
s1, preparation of organosilicon precursor a: adding 1mol of aminopropyltrimethoxysilane and 1.7mol of glycidyl versatate into a flask, and stirring and reacting for 4 hours at the temperature of 30 ℃ under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding 230g of polyether glycol into a three-neck flask, heating to 110 ℃, dehydrating for 1h under a vacuum condition, then cooling to 35 ℃, then adding 30g of HDI tripolymer, 10g of isophorone diisocyanate tripolymer and 0.6g of stannous isooctanoate, uniformly stirring, introducing nitrogen, then heating to 80 ℃, keeping the temperature for 2h, after the NCO of a test system is reduced to a theoretical value, then adding 5g of the organic silicon precursor a obtained in the step S1, and continuing to keep the temperature until the NCO is completely reacted, thus obtaining the single-component moisture-cured silicon-containing polyurethane adhesive.
The surface tension of the aqueous solution (mass concentration of 0.5%) of the polyether-modified polydimethylsiloxane was 25 mN/m.
The density of the thermoplastic polyurethane foamed by the supercritical carbon dioxide is 0.25g/cm 3 The average particle diameter was 3mm, the spring back rate was 50%, and the compression set was 10%.
The average particle diameter of the ethylene propylene diene monomer particles is 3mm, and the rubber content is 20%.
Example 4
A preparation method of a breathable environment-friendly high-performance plastic track bottom layer comprises the following steps:
adding 150g of single-component moisture-curing silicon-containing polyurethane adhesive and 200g of supercritical carbon dioxide foamed thermoplastic polyurethane into a stirrer according to a ratio, then adding 800g of ethylene propylene diene monomer particles and 5g of polyether modified heptamethyltrisiloxane, uniformly mixing and stirring, then pouring into a mold, compacting, standing at room temperature for 24 hours, demolding, and curing at 70 ℃ and 60% relative humidity for 24 hours to obtain the breathable environment-friendly high-performance plastic track bottom layer.
The preparation method of the single-component moisture-curing silicon-containing polyurethane adhesive comprises the following steps:
s1, preparation of organosilicon precursor a: adding 1mol of aminopropyl trimethoxy silane and 2mol of glycidyl versatate into a flask, and stirring and reacting for 3 hours at 40 ℃ under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding 250g of polyether triol into a three-neck flask, heating to 120 ℃, dehydrating for 1h under a vacuum condition, then cooling to 20 ℃, then adding 25g of HDI tripolymer, 15g of MDI-50 and 0.8g of stannous isooctanoate, uniformly stirring, introducing nitrogen, then heating to 100 ℃, keeping the temperature for 1h, after the NCO of a test system is reduced to a theoretical value, then adding 6g of the organic silicon precursor a obtained in the step S1, and continuously keeping the temperature until the NCO is completely reacted to obtain the single-component moisture-cured silicon-containing polyurethane adhesive.
The surface tension of the aqueous solution (mass concentration of 0.5%) of the polyether-modified heptamethyltrisiloxane was 20 mN/m.
The density of the thermoplastic polyurethane foamed by the supercritical carbon dioxide is 0.30g/cm 3 The average particle diameter was 4mm, the spring back ratio was 45%, and the compression set was 7%.
The average particle diameter of the ethylene propylene diene monomer particles is 4mm, and the rubber content is 25%.
Comparative example 1
A preparation method of a breathable environment-friendly high-performance plastic track bottom layer comprises the following steps:
100g of single-component moisture-curing silicon-containing polyurethane adhesive, 500g of ethylene propylene diene monomer particles and 1g of polyether modified polydimethylsiloxane are added into a stirrer according to the proportion, mixed and stirred uniformly, then poured into a mould, compacted, placed at room temperature for 24 hours, demoulded and cured at 60 ℃ and 50% relative humidity for 24 hours to obtain the breathable environment-friendly high-performance plastic track bottom layer.
The preparation method of the single-component moisture-curing silicon-containing polyurethane adhesive comprises the following steps:
s1, preparation of organosilicon precursor a: adding 1mol of aminopropyltrimethoxysilane and 1.05mol of glycidyl versatate into a flask, and stirring and reacting for 6 hours at the temperature of 20 ℃ under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding 150g of polyether glycol into a three-neck flask, heating to 100 ℃, dehydrating for 2h under a vacuum condition, then cooling to 25 ℃, then adding 20g of polyisocyanate and 0.3g of stannous isooctanoate, uniformly stirring, introducing nitrogen, then heating to 40 ℃, keeping the temperature for 3h, after the NCO of a test system is reduced to a theoretical value, then adding 2g of the organic silicon precursor a obtained in the step S1, and continuing to keep the temperature until the NCO is completely reacted, thus obtaining the single-component moisture-cured silicon-containing polyurethane adhesive.
The surface tension of the aqueous solution (mass concentration of 0.5%) of the polyether-modified polydimethylsiloxane was 25 mN/m.
The average particle diameter of the ethylene propylene diene monomer particles is 2mm, and the rubber content is 10%.
Comparative example 2
A preparation method of a breathable environment-friendly high-performance plastic track bottom layer comprises the following steps:
adding 100g of single-component moisture-curing silicon-containing polyurethane adhesive and 100g of supercritical carbon dioxide foamed thermoplastic polyurethane into a stirrer according to a ratio, then adding 500g of ethylene propylene diene monomer particles, uniformly mixing and stirring, then pouring into a mold, compacting, standing at room temperature for 24 hours, demolding, and curing at 60 ℃ and 50% relative humidity for 24 hours to obtain the breathable environment-friendly high-performance plastic track bottom layer.
The preparation method of the single-component moisture-curing silicon-containing polyurethane adhesive comprises the following steps:
s1, preparation of organosilicon precursor a: adding 1mol of aminopropyltrimethoxysilane and 1.05mol of glycidyl versatate into a flask, and stirring and reacting for 6 hours at the temperature of 20 ℃ under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding 150g of polyether glycol into a three-neck flask, heating to 100 ℃, dehydrating for 2h under a vacuum condition, then cooling to 25 ℃, then adding 20g of polyisocyanate and 0.3g of stannous isooctanoate, uniformly stirring, introducing nitrogen, then heating to 40 ℃, keeping the temperature for 3h, after the NCO of a test system is reduced to a theoretical value, then adding 2g of the organic silicon precursor a obtained in the step S1, and continuing to keep the temperature until the NCO is completely reacted, thus obtaining the single-component moisture-cured silicon-containing polyurethane adhesive.
The density of the thermoplastic polyurethane foamed by the supercritical carbon dioxide is 0.15g/cm 3 The average particle diameter was 2mm, the spring back rate was 60%, and the compression set was 20%.
The average particle diameter of the ethylene propylene diene monomer particles is 2mm, and the rubber content is 10%.
The performance of the breathable environment-friendly high-performance plastic track bottom layer prepared in the examples 1-4 and the comparative examples 1-2 is tested, the thickness of the sample is 13mm, the test is carried out according to the national standard GB 36246-:
TABLE 1
As can be seen from Table 1, the bottom layer of the breathable environment-friendly high-performance plastic track prepared by the invention has good tensile strength and elongation at break, and has good impact absorption performance and low vertical deformation performance. Comparative example 1 since no E-TPU pellets were added, the impact absorption performance thereof was significantly reduced, thereby causing a reduction in the elastic damping performance of the plastic track, and limiting the protection of sportsmen; in the comparative example 2, as the polyether siloxane wetting agent is not added, the E-TPU particles cannot be effectively dispersed in the mixed system and are not easy to process and form in the preparation process, so that the system is unstable, the mechanical property of the system is obviously reduced, and the long-term service performance of the plastic track is not facilitated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The bottom layer of the breathable environment-friendly high-performance plastic track is characterized by comprising the following raw materials:
(a) at least one-component moisture-cure silicon-containing polyurethane adhesive;
(b) at least one ethylene propylene diene monomer particle;
(c) at least one polyether siloxane wetting agent;
(d) at least one supercritical carbon dioxide foamed thermoplastic polyurethane;
wherein the surface tension of the water solution of the polyether type siloxane wetting agent with the mass concentration of 0.5 percent is less than or equal to 25 mN/m.
2. The air-permeable environment-friendly high-performance plastic track bottom layer as claimed in claim 1, wherein the component (a) is 10-15 parts by weight, and the component (b) is 50-80 parts by weight; (c) 0.1 to 0.5 portion of component (d) and 10 to 20 portions of component (d).
3. The air-permeable environment-friendly high-performance plastic track bottom layer as claimed in claim 1, wherein the preparation method of the component (a) is as follows:
s1, preparation of organosilicon precursor a: adding aminopropyl trimethoxy silane and tertiary carboxylic acid glycidyl ester into a flask, and stirring to react under the condition of nitrogen to obtain an organic silicon precursor a;
s2, preparing the single-component moisture-curing silicon-containing polyurethane adhesive: adding polyether polyol into a three-neck flask, heating to 120 ℃ for 100-.
4. The air-permeable environment-friendly high-performance plastic track base layer as claimed in claim 3, wherein the molar ratio of aminopropyltrimethoxysilane to glycidyl versatate in the step S1 is 1: 1.05-2; the stirring reaction temperature is 20-40 ℃, and the stirring time is 3-6 h.
5. The bottom layer of a breathable environment-friendly high-performance plastic track as claimed in claim 3, wherein in the step S2, the polyether polyol is 150-250 parts, the polyisocyanate is 20-40 parts, the catalyst is 0.3-0.8 part, and the organosilicon precursor a is 2-6 parts.
6. The air-permeable environment-friendly high-performance plastic track bottom layer as claimed in claim 3, wherein the viscosity of the component (a) is 4500-.
7. The air-permeable environment-friendly high-performance plastic track bottom layer as claimed in claim 1, wherein the average particle size of the component (b) is 2-4mm, and the gel content is 8-25%.
8. The air-permeable environment-friendly high-performance plastic track bottom layer as claimed in claim 1, wherein the component (c) is one or more of polyether modified polydimethylsiloxane and polyether modified heptamethyltrisiloxane.
9. The air-permeable environment-friendly high-performance plastic track bottom layer as claimed in claim 1, wherein the density of the component (d) is 0.15-0.30g/cm 3 The average grain diameter is 2-4mm, the rebound resilience is 45-60%, and the compression set is 5-20%.
10. The preparation method of the breathable environment-friendly high-performance plastic track bottom layer as claimed in any one of claims 1 to 8 is characterized by comprising the following steps:
adding the single-component moisture-curing silicon-containing polyurethane adhesive and thermoplastic polyurethane foamed by supercritical carbon dioxide into a stirrer according to a ratio, then adding the ethylene propylene diene monomer particles and the polyether siloxane wetting agent, uniformly mixing and stirring, then pouring into a mould, compacting, standing at room temperature for 24 hours, demoulding, and curing at 60-70 ℃ and 50-60% relative humidity for 24 hours to obtain the breathable environment-friendly high-performance plastic track bottom layer.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978401A (en) * | 2018-08-27 | 2018-12-11 | 湖北科蓝科技有限公司 | Mixed type primer ties line plastic cement race track and its construction method certainly |
| CN111534264A (en) * | 2020-04-16 | 2020-08-14 | 上海抚佳精细化工有限公司 | Silane-modified polyurethane adhesive for plastic track bottom layer material and preparation method and application thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978401A (en) * | 2018-08-27 | 2018-12-11 | 湖北科蓝科技有限公司 | Mixed type primer ties line plastic cement race track and its construction method certainly |
| CN111534264A (en) * | 2020-04-16 | 2020-08-14 | 上海抚佳精细化工有限公司 | Silane-modified polyurethane adhesive for plastic track bottom layer material and preparation method and application thereof |
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