CN112341596B - Prefabricated polyurethane foaming elastomer material, preparation method thereof, constructed court and construction method thereof - Google Patents
Prefabricated polyurethane foaming elastomer material, preparation method thereof, constructed court and construction method thereof Download PDFInfo
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/30—Low-molecular-weight compounds
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- C08G18/30—Low-molecular-weight compounds
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- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
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- C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
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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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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- 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
- 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
- E01C13/04—Pavings made of prefabricated single units
- E01C13/045—Pavings made of prefabricated single units the prefabricated single units consisting of or including bitumen, rubber or plastics
Abstract
The invention relates to the field of polyurethane sports fields, in particular to a prefabricated polyurethane foaming elastomer material and a preparation method thereof, a constructed court and a construction method thereof. The prefabricated polyurethane foaming elastomer material is a bi-component foaming polyurethane material and consists of a component A and a component B; wherein the component A consists of polyether polyol, polymer polyol, a foam stabilizer, talcum powder, color green, fumed silica, diethanolammonium, glycol, water and a catalyst; the component B is modified MDI; A. the proportion of the component B is calculated according to the isocyanate index which is 0.7-0.8. The prefabricated polyurethane foaming elastomer material solves the problems of uneven foaming and bulging of a cast-in-place foaming material, and has low water absorption and good cohesiveness; the court constructed by the invention not only solves the problem of poor flatness of the prefabricated court, but also enables the court to have better aging resistance and yellowing resistance.
Description
Technical Field
The invention relates to the field of polyurethane sports fields, in particular to a prefabricated polyurethane foaming elastomer material and a preparation method thereof, a constructed court and a construction method thereof.
Background
Most of the prior court of various indoor and outdoor sports grounds are cast in situ, the impact absorption and vertical deformation performance of the court are limited by the promulgation of a new national standard GB/36246 plus 2018, and in order to meet the performance requirement, most manufacturers design materials to have certain foaming rate when designing formulas, so that the problems are faced, namely, the foaming rates of the materials used in different temperature and humidity environments are different, and the court is easy to bulge under the conditions of high temperature and high air humidity, so that the court quality is influenced.
Patent CN110540674A discloses a solvent-free foamed polyurethane prefabricated plastic track elastic layer and a preparation method thereof, which solves the problems of non-uniform foaming rate and bulge of the cast-in-place foamed material, but from the formulation of the foamed material, the foam stabilizer is absent, and the foam holes are not uniform, i.e. large foam and small foam are irregularly distributed, without the presence of the foam stabilizer in the system using water as the foaming agent; in addition, the formula control index (R) is between 1.1 and 1.5, and repeated patent experiments show that most of the cells of the product in the formula are open, namely the water absorption rate is high.
Patent CN109914186A discloses a prefabricated coiled material polyurethane runway surface layer and its construction process, wherein the elastic support layer is mainly used to solve the problem of poor elasticity of the material itself, and an additional elastic support layer for improving the elasticity performance or even similar structural design is required, which increases the difficulty of the construction process.
Patent CN107630396A discloses a sports ground combining semi-prefabricated rubber and high polymer materials, the construction scheme of the court is that an elastic layer and a buffer layer are both prefabricated in factories, and a layer of anti-aging wear-resistant layer with the thickness of 0.5-0.9mm is finally sprayed, but after the prefabricated materials are paved in actual construction, joints and stubbles are inevitably left, and the surface layer with the thickness of 0.5-0.9mm is too thin, so that the problem that the joints cannot be covered locally exists, and the overall flatness of the court is poor; and the formula of the anti-aging wear-resistant layer belongs to the conventional polyurethane material, so that the problem of poor long-term anti-aging performance exists, and the problem of yellowing exists because the isocyanate does not belong to aliphatic isocyanate.
Disclosure of Invention
The invention aims to provide a prefabricated polyurethane foaming elastomer material, which solves the problems of uneven foaming and bulging of a cast-in-place foaming material, and has low water absorption and good cohesiveness; the invention also aims to provide a court constructed by the court, which not only solves the problem of poor flatness of the prefabricated court, but also enables the court to have better aging resistance and yellowing resistance, and also provides a construction method of the court.
The prefabricated polyurethane foaming elastomer material is a bi-component foaming polyurethane material and consists of a component A and a component B;
wherein the component A comprises the following components in percentage by mass:
the component B is modified MDI;
A. the proportion of the component B is calculated according to the isocyanate index which is 0.7-0.8.
The polyether polyol has the functionality of 3 and the molecular weight of 4000-8000; polyether polyol EP-3600 from Dow chemical company Limited of Dow, Lanxingdong is preferred.
The polymer polyol is polyether polyol of styrene or acrylonitrile graft copolymerization, the functionality is 3, the solid content is 40-45%, and the number average molecular weight is 5000-; CHP-H45 from Changhua polyurethane technology, Inc., Jiangsu is preferred.
The foam stabilizer is compounded by a silicon foam stabilizer and a non-silicon foam stabilizer according to the mass ratio of 1: 1; preferably, the silicon foam stabilizer L580 (American Meiji group) and the non-silicon foam stabilizer LK-221 (Germany winning industry group) are compounded.
The talcum powder is 600 mesh talcum powder.
The catalyst is an amine catalyst, has a delayed catalytic action, and is preferably compounded by BL-17 (New classical chemical materials Co., Ltd.) and 8154 (New classical chemical materials Co., Ltd.) according to a mass ratio of 1: 2.5-10.
The component B is modified MDI, the content of isocyanic acid radical is 22-26 wt%, and the component B is polyether polyol and isocyanate prepolymer; preferably DG1524 from shandong norway polyurethane gmbh.
According to the prefabricated polyurethane foaming elastomer material, the requirements of new national standards on impact absorption and vertical deformation performance are well met by selecting the polyether polyol with 3 functionality and matching the polymer polyol; the closed pore rate of the material and the ball rebound rate of the field are well controlled by the reasonable collocation of the polyether polyol and the polymer polyol and the dosage control of the polymer polyol, and the unreasonable collocation and dosage directly influence the closed pore rate of the material and the ball rebound rate of the whole material.
And through the selection and the prefabrication process of the foam stabilizer, the problems of uneven foaming and bulging of the cast-in-place foam injection material are solved, the material cost is reduced by reducing the material density, the closed-cell foaming of the foam material is solved, the problem of high water absorption of the open-cell material is solved, the foam stabilizer of the foam material selects a silicon foam stabilizer and a non-silicon foam stabilizer for compounding, the problem of poor adhesion with a reinforcing layer due to upward migration of the silicon foam stabilizer is solved, and the site has better aging resistance and yellowing resistance due to the selection of the finish paint.
The isocyanate index (R) is controlled to be between 0.7 and 0.8, the prepared prefabricated polyurethane foaming elastomer material is high in closed cell rate, the water absorption effect is remarkably improved through a comparison test, and cells are very uniform.
The preparation method of the prefabricated polyurethane foaming elastomer material for the court comprises the following steps:
mixing all the raw materials of the component A uniformly, then mixing the component A and the component B in proportion, injecting the mixture into a production mold special for a plastic court, controlling the temperature at 20-30 ℃, opening the mold for molding within 20-30min, and cutting the mixture into the required thickness according to the requirement to obtain the prefabricated polyurethane foaming elastomer material.
The prefabricated polyurethane foaming elastomer material has simple process, can be opened in 20-30min, has short production period and simple and convenient material production process.
The court constructed by adopting the prefabricated polyurethane foaming elastomer material sequentially comprises a court foundation, a polyurethane adhesive, a prefabricated polyurethane foaming elastomer material layer, a polyurethane reinforcing layer and a super-strong weather-resistant water-based finish paint from bottom to top.
The prefabricated polyurethane foaming elastomer material layer is bonded and paved on a site foundation by adopting a polyurethane adhesive, and the polyurethane reinforcing layer and the super-strong weather-resistant water-based finish paint are cast in situ.
The site foundation is an asphalt foundation or a cement foundation and is maintained in place.
The polyurethane adhesive and the polyurethane reinforcing layer are both double-component polyurethane adhesives; the component A is a mixed solution of polyether polyol, pigment and filler, an anti-settling agent, a catalyst and a chain extender; the component B is a prepolymer of polyether polyol and isocyanate; A. after the component B is mixed and cured, the tensile strength of the material is more than or equal to 2Mpa, the elongation at break is more than or equal to 200 percent, and the hardness is more than 50 Shore A. The A/B component is preferably DHPU-203Q/DP1675-B (polyurethane available from Norway, Shandong Co., Ltd.).
The super-strong weather-resistant water-based finish paint is a bi-component water-based finish paint of an acrylic acid system or a mixed system of acrylic acid and polyurethane; the component A is a mixed solution of aqueous acrylic acid emulsion or aqueous acrylic acid and aqueous polyurethane mixed emulsion, wetting agent, dispersing agent, defoaming agent, thickening agent, filler, aqueous color paste, film-forming assistant and titanium dioxide; the component B is an aliphatic curing agent 2547. The A/B component is preferably DWPU-101A red/DWPU-101B (Shandong-Nowev polyurethane Co., Ltd.).
The invention relates to a construction method of a court constructed by adopting a prefabricated polyurethane foaming elastomer material, which comprises the following steps:
(1) paving a 4-6mm prefabricated polyurethane foaming elastomer material layer on the foundation of the site, and bonding by adopting a polyurethane adhesive;
(2) pouring a 2-4mm polyurethane reinforcing layer on the prefabricated polyurethane foaming elastic layer;
(3) and (3) rolling, spraying or blade coating 0.05-0.1mm of super-strong weather-resistant water-based finish paint on the polyurethane reinforcing layer.
The invention provides a semi-prefabricated polyurethane court construction scheme, namely a semi-prefabricated court construction scheme is designed, a prefabricated polyurethane foaming elastomer material layer is adopted, and a reinforced layer and an ultrahigh weather-resistant finish paint layer still adopt a cast-in-place injection scheme, so that the problem that most of prefabricated court is poor in flatness is solved, and the cast-in-place injection self-leveling polyurethane reinforced layer with the thickness of 2-4mm can ensure that the court is very smooth and attractive in flatness; and secondly, the higher elasticity of the foaming material avoids additionally adding an elastic supporting layer for improving the elasticity performance and even similar structural design, thereby simplifying the construction process.
The field has the characteristics of simple construction, safety, environmental protection, high field flatness, good impact absorption and vertical deformation performance, aging resistance and good wear resistance, and is mainly applied to paving the court field.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the prefabricated polyurethane foaming elastomer material, the selection of the polyether polyol with the 3-functionality degree and the matching of the polymer polyol enable the whole material to well meet the requirements of new national standards on impact absorption and vertical deformation performance, the reasonable matching of the polyether polyol and the polymer polyol and the control of the using amount of the polymer polyol well control the closed-cell rate of the material and the ball rebound rate of a field;
(2) according to the prefabricated polyurethane foaming elastomer material, through selection of the foam stabilizer and a prefabrication process, the problems of uneven foaming and bulging of a cast-in-place foaming material are solved, the material density is reduced, the material cost is reduced, closed-cell foaming of the foaming material is realized by combining index control, and the problem of high water absorption of a perforated material is solved; the production process of the prefabricated polyurethane foaming elastic layer is simple, the mould can be opened within 20-30min, the production period is short, the production process is simple, and the higher elasticity of the foaming material avoids the additional addition of an elastic supporting layer aiming at improving the elasticity performance and even similar structural design, so that the construction process is simple;
(3) according to the prefabricated polyurethane foaming elastomer material, the silicon foam stabilizer and the non-silicon foam stabilizer are selected to be compounded through the foam stabilizer, so that the problem of poor bonding force with a reinforcing layer caused by upward migration of the silicon foam stabilizer is solved;
(4) the semi-prefabricated polyurethane court construction scheme is designed, only the foaming elastic layer is prefabricated, and the reinforcing layer and the ultrahigh weather-resistant finish paint layer are cast at the same time, so that the problem of poor flatness of most prefabricated court is solved.
Detailed Description
The present invention will be further described with reference to examples and comparative examples.
The raw material manufacturers used in the examples and comparative examples were as follows:
polyether polyol EP-3600, Dow chemical Co., Ltd, Dow, Lanxingdong;
polymer polyol CHP-H45: jiangsu Changhua polyurethane science and technology Limited;
silicon foam stabilizer L580: the American Meiji group;
non-silicon foam stabilizer LK-221: the German winning industry group;
600 mesh talcum powder: shandong Linyi Daqing Gancao;
color green: tianjin, same color chemical Co., Ltd;
gas-phase white carbon black: jiangxi black cat carbon black, Inc.;
diethanolammonium: american dow chemistry;
ethylene glycol: jinan le Jun chemical Co., Ltd;
catalyst BL-17: new classic chemical materials, ltd;
catalyst 8154: new classic chemical materials, ltd;
modified MDI DG 1524: Shandong-Nowei polyurethane corporation;
polyurethane adhesive and A/B component of polyurethane reinforcing layer DHPU-203Q/DP 1675-B: Shandong-Nowei polyurethane corporation;
A/B component DWPU-101A red/DWPU-101B of the super-strong weather-resistant water-based finish paint: Shandong-Nowei polyurethane corporation.
Example 1
The preparation method of the prefabricated polyurethane foaming elastomer material comprises the following steps:
(1) the component A comprises: mixing and stirring 30g of EP-3600, 7g of CHP-H45, 0.1g of L-580, 0.1g of LK-221, 40g of 600-mesh talcum powder, 10g of color green, 5g of fumed silica, 2g of diethanolammonium, 4g of ethylene glycol, 0.7g of water, 0.1g of BL-17 and 1g of 8154 uniformly to obtain a component A;
(2) and B component: adopting DG 1524;
(3) according to A, B components, mixing to obtain isocyanate index (R) of 0.7, adjusting the flow rate of a pipeline of a casting machine A, B to control the proportion of A, B components, mixing A, B components through a gun head of the casting machine, injecting the mixture into a special production line mold for a plastic court, performing mold opening molding at the mold temperature of 20 ℃ for 30min, and then cutting the mixture into required thickness according to the requirement to obtain the prefabricated polyurethane foaming elastomer material.
The prefabricated polyurethane foaming elastomer material prepared in the above way is used for carrying out construction of a semi-prefabricated polyurethane court, and the court sequentially comprises a court foundation, a polyurethane adhesive, a prefabricated polyurethane foaming elastomer material layer, a polyurethane reinforcing layer and a super-strong weather-resistant water-based finish paint from bottom to top. The construction steps are as follows:
(1) maintaining an asphalt field foundation in place, paving a 6mm prefabricated polyurethane foaming elastomer material layer on the field foundation, and bonding by adopting a polyurethane adhesive, wherein the polyurethane adhesive is prepared by mixing DHPU-203Q and DP1675-B according to a mass ratio of 3: 1;
(2) pouring a 2mm polyurethane reinforcing layer on the prefabricated polyurethane foaming elastic layer, wherein the polyurethane reinforcing layer is formed by mixing DHPU-203Q and DP1675-B according to the mass ratio of 3: 1;
(3) and (3) rolling and coating 0.05mm of super-strong weather-resistant water-based finish paint on the polyurethane reinforcing layer, wherein the super-strong weather-resistant water-based finish paint is formed by mixing DWPU-101A red and DWPU-101B according to the mass ratio of 15:1, and thus the semi-prefabricated polyurethane court is obtained.
Example 2
The preparation method of the prefabricated polyurethane foaming elastomer material comprises the following steps:
(1) the component A comprises: mixing and stirring 40g of EP-3600, 5g of CHP-H45, 0.25g of L-580, 0.25g of LK-221, 30g of 600-mesh talcum powder, 3g of color green, 1g of fumed silica, 0.5g of diethanolammonium, 2g of ethylene glycol, 0.4g of water, 0.2g of BL-17 and 1g of 8154 uniformly to obtain a component A;
(2) and B component: adopting DG 1524;
(3) according to A, B components, adjusting the isocyanate index (R) to 0.8 after mixing, adjusting the flow rate of a pipeline of a casting machine A, B to control the proportion of A, B components, mixing A, B components through a gun head of the casting machine, injecting the mixture into a special production line mold for a plastic court, performing mold opening molding at the mold temperature of 30 ℃ for 20min, and then cutting the mixture into required thickness according to the requirement to obtain the prefabricated polyurethane foaming elastomer material.
The prefabricated polyurethane foaming elastomer material prepared in the above way is used for carrying out construction of a semi-prefabricated polyurethane court, and the court sequentially comprises a court foundation, a polyurethane adhesive, a prefabricated polyurethane foaming elastomer material layer, a polyurethane reinforcing layer and a super-strong weather-resistant water-based finish paint from bottom to top. The construction steps are as follows:
(1) maintaining a cement field foundation in place, paving a 4mm prefabricated polyurethane foaming elastomer material layer on the cement field foundation, and bonding by adopting a polyurethane adhesive, wherein the polyurethane adhesive is formed by mixing DHPU-203Q and DP1675-B according to a mass ratio of 3: 1;
(2) pouring a 4mm polyurethane reinforcing layer on the prefabricated polyurethane foaming elastic layer, wherein the polyurethane reinforcing layer is formed by mixing DHPU-203Q and DP1675-B according to the mass ratio of 3: 1;
(3) and rolling and coating 0.1mm of super-strong weather-resistant water-based finish paint on the polyurethane reinforcing layer, wherein the super-strong weather-resistant water-based finish paint is formed by mixing DWPU-101A red and DWPU-101B according to the mass ratio of 15:1, and thus obtaining the semi-prefabricated polyurethane court.
Example 3
The preparation method of the prefabricated polyurethane foaming elastomer material comprises the following steps:
(1) the component A comprises: mixing and stirring evenly 35g of EP-3600, 6g of CHP-H45, 0.2g of L-580, 0.2g of LK-221, 35g of 600-mesh talcum powder, 6g of color green, 3g of fumed silica, 1g of diethanolammonium, 2g of ethylene glycol, 0.55g of water, 0.15g of BL-17 and 0.75g of 8154 to obtain a component A;
(2) and B component: adopting DG 1524;
(3) according to A, B components, mixing to obtain isocyanate index (R) of 0.75, adjusting the flow rate of a pipeline of a casting machine A, B to control the proportion of A, B components, mixing A, B components through a gun head of the casting machine, injecting the mixture into a special production line mold for a plastic court, performing mold opening molding at the mold temperature of 30 ℃ for 20min, and then cutting the mixture into required thickness according to requirements to obtain the prefabricated polyurethane foaming elastomer material.
The prefabricated polyurethane foaming elastomer material prepared in the above way is used for carrying out construction of a semi-prefabricated polyurethane court, and the court sequentially comprises a court foundation, a polyurethane adhesive, a prefabricated polyurethane foaming elastomer material layer, a polyurethane reinforcing layer and a super-strong weather-resistant water-based finish paint from bottom to top. The construction steps are as follows:
(1) maintaining an asphalt field foundation in place, paving a 5mm prefabricated polyurethane foaming elastomer material layer on the field foundation, and bonding by adopting a polyurethane adhesive, wherein the polyurethane adhesive is prepared by mixing DHPU-203Q and DP1675-B according to a mass ratio of 3: 1;
(2) pouring a 5mm polyurethane reinforcing layer on the prefabricated polyurethane foaming elastic layer, wherein the polyurethane reinforcing layer is formed by mixing DHPU-203Q and DP1675-B according to the mass ratio of 3: 1;
(3) and (3) rolling and coating 0.075mm of super-strong weather-resistant water-based finish paint on the polyurethane reinforcing layer, wherein the super-strong weather-resistant water-based finish paint is formed by mixing DWPU-101A red and DWPU-101B according to the mass ratio of 15:1, and thus the semi-prefabricated polyurethane court is obtained.
Comparative example 1
The difference between the comparative example and the example 3 is that the component A of the prefabricated polyurethane foaming elastomer material does not contain polymer polyol CHP-H45, and the other steps are carried out according to the example 3 to obtain the semi-prefabricated polyurethane court.
Comparative example 2
The difference between the comparative example and the example 3 is that the prefabricated polyurethane foaming elastomer material is prepared into the semi-prefabricated polyurethane court according to the steps of adjusting A, B components according to the isocyanate index (R) of 1.0 after mixing and constructing according to the example 3.
Comparative example 3
The difference between the comparative example and the example 3 is only that the foam stabilizer in the A component of the prefabricated polyurethane foaming elastomer material is different, the comparative example adopts 0.5g of LK-221 to replace 0.2g L-580 and 0.2g of LK-221 in the example 3, and the other steps are carried out according to the example 3 to obtain a semi-prefabricated polyurethane court.
Comparative example 4
The difference between the comparative example and the example 3 is only that the foam stabilizer in the A component of the prefabricated polyurethane foaming elastomer material is different, the comparative example adopts 0.5g L-580 to replace 0.2g L-580 and 0.2g LK-221 in the example 3, and the other steps are carried out according to the example 3 to obtain a semi-prefabricated polyurethane court.
Carrying out performance test on the semi-prefabricated polyurethane court obtained by the construction of the examples 1-3 and the comparative examples 1-4, wherein the detection standard is GB/36246-; the impact absorption and vertical deformation testing equipment is a DELTEC 2A type impact absorption vertical deformation tester in the Netherlands, and the tensile strength, the elongation at break and the layer-to-layer adhesion testing equipment is a KRAW-C type servo universal testing machine.
TABLE 1 test results of semi-prefabricated polyurethane court obtained by construction of examples 1-3 and comparative examples 1-4
As can be seen from table 1: the semi-prefabricated polyurethane court constructed in the embodiments 1, 2 and 3 of the invention has impact absorption and vertical deformation well meeting the requirements of the new national standard GB/36246-2018. The comparative example 1 does not contain polymer polyol, the rebound rate of the court is obviously reduced, and the synergistic effect of the polyether polyol and the polymer polyol is proved to be capable of obviously improving the elasticity of the court. Comparative example 2 the isocyanate index (R) was controlled at 1.0 and the water absorption of the court was significantly increased, indicating that the isocyanate index had a greater effect on the closed cell content of the polyurethane elastomer material. Compared examples 3-4 all adopt single kind of foam stabilizer, and the adhesion of prefabricated type foaming layer and cast-in-place notes reinforcing layer in compared example 3 descends, and prefabricated type foaming elastic layer cell uniformity degree reduces in compared example 4, all influences the life in court. By comparison, the formula design of the prefabricated polyurethane foaming elastic layer is scientific and reasonable, the polyether polyol and the polymer polyol are compounded, the closed-cell structure material is prepared by controlling indexes, the foam stabilizer is selected in a compounding manner, the foaming rate, the uniformity and the layer-to-layer binding power of the material are guaranteed, and finally the construction scheme is combined, so that the semi-prefabricated court is good in flatness, excellent in performance and long in service life, comprehensively shows a good effect, and has excellent popularization value.
Claims (9)
1. A prefabricated polyurethane foaming elastomer material is characterized in that: consists of a component A and a component B;
the component A comprises the following components in percentage by mass:
the component B is modified MDI;
A. the proportion of the component B is calculated according to the isocyanate index which is 0.7-0.8;
the foam stabilizer is compounded by silicon foam stabilizers and non-silicon foam stabilizers according to the mass ratio of 1: 1.
2. The preformed polyurethane foamed elastomeric material of claim 1, wherein: the polyether polyol has a functionality of 3 and a molecular weight of 4000-8000.
3. The preformed polyurethane foamed elastomeric material of claim 1, wherein: the polymer polyol is polyether polyol of styrene or acrylonitrile graft copolymerization, the functionality is 3, the solid content is 40-45%, and the number average molecular weight is 5000-6000.
4. The preformed polyurethane foamed elastomeric material of claim 1, wherein: the talcum powder is 600 meshes talcum powder; the catalyst is amine catalyst.
5. The preformed polyurethane foamed elastomeric material of claim 1, wherein: the isocyanate content of the modified MDI is 22 to 26 wt.%.
6. A method for preparing a prefabricated polyurethane foam elastomer material according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
mixing all the raw materials of the component A uniformly, then mixing the component A and the component B in proportion, injecting the mixture into a plastic court production mold, controlling the temperature at 20-30 ℃, opening the mold for molding within 20-30min, and cutting the mixture into the required thickness according to the requirement to obtain the prefabricated polyurethane foaming elastomer material.
7. A court constructed of a prefabricated polyurethane foam elastomer material as claimed in any one of claims 1 to 5, wherein: sequentially arranging a field foundation, a polyurethane adhesive, a prefabricated polyurethane foaming elastomer material layer, a polyurethane reinforcing layer and weather-resistant water-based finish paint from bottom to top;
the prefabricated polyurethane foaming elastomer material layer is bonded and paved on a site foundation by adopting a polyurethane adhesive, and the polyurethane reinforcing layer and the weather-resistant water-based finish paint are cast in situ.
8. A court constructed of the prefabricated polyurethane foam elastomer material as claimed in claim 7, wherein: the site foundation is an asphalt foundation or a cement foundation;
the polyurethane adhesive and the polyurethane reinforcing layer are both double-component polyurethane adhesives;
the weather-resistant water-based finish paint is a bi-component water-based finish paint of an acrylic acid system or a mixed system of acrylic acid and polyurethane.
9. A construction method of a court made of the prefabricated polyurethane foam elastomer material as claimed in claim 7, wherein the construction method comprises the following steps: the method comprises the following steps:
(1) paving a 4-6mm prefabricated polyurethane foaming elastomer material layer on the foundation of the site, and bonding by adopting a polyurethane adhesive;
(2) pouring a 2-4mm polyurethane reinforcing layer on the prefabricated polyurethane foaming elastomer material layer;
(3) and (3) rolling, spraying or blade-coating 0.05-0.1mm of weather-resistant water-based finish paint on the polyurethane reinforcing layer.
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| CN115012274A (en) * | 2022-07-14 | 2022-09-06 | 江苏长诺运动场地新材料有限公司 | Semi-prefabricated polyurethane runway and construction process thereof |
| CN116143992B (en) * | 2023-04-14 | 2023-06-27 | 山东一诺威聚氨酯股份有限公司 | Rapid-curing casting polyurethane runway material and preparation method and application thereof |
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