Prefabricated polyurethane runway material capable of preventing thermal expansion and cold contraction and preparation method thereof

Abstract

The invention belongs to the technical field of runway materials, and particularly relates to a prefabricated polyurethane runway material capable of preventing thermal expansion and cold contraction and a preparation method thereof, and the preparation method comprises the following steps: step (1), selecting a glass fiber grid for surface pretreatment; the method comprises the following steps: firstly, carrying out heat treatment on a glass fiber grid at 250-300 DEG C for 15-30 minutes, then treating the glass fiber grid with a surface treating agent for 20-30 minutes, and finally washing and drying; (2) preparing the component A; (3) preparing a component B; and (4) placing the plurality of pretreated glass fiber grids in a mold, adding the component A material into the material cylinder A, adding the component B material into the material cylinder B, adjusting the material output flow of the material cylinder A and the material cylinder B, conveying to the mold, heating at 65 DEG C for 10-20 minutes, and curing. The glass fiber grids are added into the product, so that larger gaps caused by thermal expansion and cold contraction can be reduced, the influence of the gaps on the performance and the service life of the prefabricated runway is reduced, and the problems of bumps, shrinkage joints, surface cracking and the like caused by thermal expansion and cold contraction are greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of runway materials, and in particular relates to a prefabricated polyurethane runway material that prevents thermal expansion and contraction and a preparation method thereof. Background Art

[0002] Polyurethane materials shine in the plastic track industry with their excellent performance. As an important type of polyurethane material, polyurethane foam material has also attracted much attention in the plastic track industry due to its good physical properties and the ability to greatly reduce costs. Many companies in the industry are exploring the use process and technical conditions of foam materials on tracks.

[0003] The present invention with application number CN202011170988.8 discloses a prefabricated polyurethane foamed elastomer material and its preparation method, a constructed court and its construction method. The prefabricated polyurethane foamed elastomer material is a two-component foamed polyurethane material, which is composed of component A and component B; wherein component A is composed of polyether polyol, polymer polyol, foam stabilizer, talcum powder, color green, fumed silica, diethanol ammonium, ethylene glycol, water, and a catalyst; component B is modified MDI; the ratio of components A and B is calculated according to the isocyanate index, and the isocyanate index is 0.7-0.8. The prefabricated polyurethane foamed elastomer material of the present invention solves the problem of uneven foaming and bulging of cast-in-place foaming materials, has low water absorption and good adhesion; the court constructed by the present 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.

[0004] The current prefabricated polyurethane foam track materials all have a common problem. Because they are prefabricated, they need to be spliced ​​together when paved. In areas with large temperature differences between day and night, large gaps will appear at the splicing due to thermal expansion and contraction, affecting the use. At the same time, large gaps will also affect the performance and life of the plastic track. We urgently need to find a way to reduce the gap problem caused by thermal expansion and contraction of materials. Summary of the invention

[0005] The purpose of the present invention is to provide a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction and a preparation method, aiming to solve the technical problem of gaps caused by thermal expansion and contraction in the prefabricated polyurethane runway material during paving in the prior art.

[0006] To achieve the above object, the present invention provides a method for preparing a prefabricated polyurethane runway material that prevents thermal expansion and contraction, comprising the following steps:

[0007] Step (1): selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at a temperature of 250 to 300° C. for 15 to 30 minutes, then treating it with a surface treatment agent for 20 to 30 minutes, and finally washing and drying to obtain the pretreated glass fiber mesh;

[0008] Step (2): preparing component A;

[0009] Step (3): preparing component B;

[0010] Step (4): placing a plurality of pretreated glass fiber meshes in a mold, adding the component A material into the A material cylinder, adding the component B material into the B material cylinder, adjusting the material flow rates outputted from the A material cylinder and the B material cylinder, inputting the component A material and the component B material into a mixer in a ratio of 1:1.4 and mixing them uniformly, conveying them to the mold and heating them at 65°C for 10 to 20 minutes to cure them, thereby obtaining a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0011] Preferably, in the step (3), a carbon fiber mesh cloth is disposed on one side of each of the glass fiber meshes, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

[0012] Preferably, the surface treatment agent in step (3) comprises the following raw materials in parts by weight: 0.5 to 1 part of a film-forming agent, 0.5 to 1 part of an antistatic agent SN, 0.5 to 3 parts of a silane coupling agent and 90 to 95 parts of a solvent.

[0013] Preferably, the preparation step of the surface treatment agent in step (3) comprises: firstly adjusting the pH of the solvent to 4-5 using an organic acid or salt, adding the silane coupling agent to the solvent, stirring sufficiently until the surface treatment agent is transparent, then adding the film-forming agent, the antistatic agent and the surfactant, and continuing to stir sufficiently to obtain the surface treatment agent.

[0014] Preferably, the film-forming agent is a small molecule wax of polyethylene and / or a small molecule wax of polypropylene; the solvent is one or a mixture of several of benzene, toluene, ethanol, acetone and water:

[0015] Preferably, the method for preparing the component A comprises the following steps:

[0016] S11: according to the formula, 20 to 70 parts by weight of polyether polyol, 10 to 20 parts by weight of 52# chlorinated paraffin, 2 to 15 parts by weight of vegetable fat and 10 to 30 parts by weight of isocyanate are weighed;

[0017] S12: Add the polyether polyol, the 52# chlorinated paraffin and the vegetable fat into a reaction kettle and dehydrate at 2500-3000 rpm at 120°C for 1-2 hours, then lower the temperature to 70-80°C, add part of the isocyanate and react for 1-2 hours, then add part of the isocyanate and react for 1-2 hours to obtain the component A.

[0018] Preferably, the method for preparing the component B comprises the following steps:

[0019] S21: According to the formula, 4 to 20 parts by weight of polyether polyol, 10 to 30 parts by weight of 52# chlorinated paraffin, 2 to 15 parts by weight of vegetable fat, 0.1 to 0.5 parts by weight of white carbon black, 10 to 30 parts by weight of 400 mesh calcium powder, 20 to 40 parts of 600 mesh talc, 0.1 to 0.5 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.1 to 0.5 parts by weight of dispersant, 0.1 to 0.5 parts by weight of uniform foaming agent, 0.1 to 0.5 parts by weight of toner and 1 to 10 parts by weight of runway drying agent are weighed;

[0020] S22: Add the polyether polyol, the 52# environmentally friendly chlorinated paraffin, the plant ester, the white carbon black, the 400 mesh calcium powder, the 600 mesh talc, the 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), the dispersant, the foam leveling agent, the runway drying agent and the color powder into another reaction kettle at 3000-3500 rpm and 120° C. for dehydration for 1-2 hours to obtain the B component.

[0021] Preferably, the polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from one or a mixture of 400 g / mol, 1000 g / mol and 2000 g / mol, and the molecular weight of the polyether triol is selected from 3000 g / mol, 5000 g / mol or a mixture thereof.

[0022] Preferably, the isocyanate is toluene diisocyanate and / or diphenylmethane diisocyanate;

[0023] Preferably, the dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is one of benzoyl peroxide and diisopropylbenzene peroxide.

[0024] Specifically, glass fiber and carbon fiber have excellent resistance to thermal expansion and contraction. Adding them to prefabricated polyurethane runway materials can reduce the large gaps in the prefabricated polyurethane runway materials due to thermal expansion and contraction, which affects the use. At the same time, the use of gridded glass fiber and carbon fiber can increase the contact area with the upper and lower layers of polyurethane, making the combination more firm. At the same time, the glass fiber and carbon fiber are bonded and connected by resin, making the combination more compact. The resistance to thermal expansion and contraction is stronger.

[0025] The surface of glass fiber is easily polluted by oily substances in the atmosphere. The contaminants on the surface of these fibers can give it a certain degree of hydrophobicity, and can also reduce its surface energy and bonding performance. In addition, the siloxane groups on the surface of glass fiber react with water vapor in the air to form silanol. The silanol (chemically adsorbed water on the surface of glass fiber) and physically adsorbed water generated by the reaction with siloxane shield the high-energy surface of the fiber and also have a certain impact on the bonding performance. It affects the adhesion of the glass fiber mesh with the upper layer of polyurethane non-foaming material and the lower layer of polyurethane foaming material, so the glass fiber mesh must be pretreated.

[0026] When treating the glass fiber mesh, heat treatment can be performed first to remove the paraffin textile sizing agent attached to the surface of the glass fiber during the molding process to meet the subsequent processing technology. We use silane coupling agent, which has the function of forming a chemical bond between the glass fiber surface and polyurethane, and plays a bridging role in polyurethane materials. Treating the glass fiber surface with a coupling agent can improve the wettability between the fiber and the matrix, forming a mechanical micro-buffer, protecting the glass fiber surface while greatly enhancing the adhesion between the glass and polyurethane interfaces, preventing the intrusion of moisture or other impurities, reducing or even eliminating weak interface layers; effectively transmitting stress, improving the adhesion between interfaces, and also significantly improving the comprehensive performance of polyurethane runway materials. Furthermore, when we prepare the surface treatment agent, the pH is between 4 and 5, at which time the silane coupling agent can hydrolyze faster, speeding up the preparation efficiency.

[0027] The above one or more technical solutions in the method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction provided by an embodiment of the present invention have at least one of the following technical effects:

[0028] The present invention adds a glass fiber mesh to the prefabricated polyurethane runway material, which can reduce the large gaps in the prefabricated polyurethane runway material due to thermal expansion and contraction, reduce the impact of the gaps on the performance and service life of the prefabricated runway, and greatly reduce the bulging, shrinkage seams, surface cracks and other problems caused by thermal expansion and contraction of the polyurethane runway material. At the same time, the addition of the glass fiber mesh also enhances the internal strength of the polyurethane material.

[0029] At the same time, the present invention adds a carbon fiber mesh cloth to one side of the glass fiber mesh, and the two are bonded by resin to assist each other, thereby achieving better resistance to thermal expansion and contraction. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0031] Example 1

[0032] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0033] The steps include:

[0034] Step (1): Selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at a temperature of 250-300° C. for 15 minutes, then treating it with a surface treatment agent for 20 minutes, and finally washing and drying to obtain a pretreated glass fiber mesh;

[0035] Step (2): preparing component A;

[0036] Step (3): preparing component B;

[0037] Step (4): placing a plurality of pretreated glass fiber meshes in a mold, adding component A material into a material tank A, adding component B material into a material tank B, adjusting the material flow rate outputted by the material tanks A and B, inputting component A material and component B material into a mixer in a ratio of 1:1.4 and mixing them uniformly, conveying them to the mold and heating them at 65°C for 10 minutes to cure, thereby obtaining a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0038] In step (3), a carbon fiber mesh cloth is provided on one side of each glass fiber mesh, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

[0039] The surface treatment agent in step (3) comprises the following raw materials in parts by weight: 0.5 parts of a film-forming agent, 1 part of an antistatic agent SN, 3 parts of a silane coupling agent and 95 parts of a solvent.

[0040] The preparation steps of the surface treatment agent in step (3) include: firstly adjusting the pH of the solvent to 4 using an organic acid or salt, adding a silane coupling agent to the solvent, stirring fully until the surface treatment agent is transparent, then adding a film-forming agent, an antistatic agent and a surfactant, and continuing to stir fully to obtain the surface treatment agent.

[0041] The film-forming agent is a small molecule wax of polyethylene and / or a small molecule wax of polypropylene; the solvent is a mixture of benzene, toluene, ethanol, acetone and water.

[0042] The preparation method of component A comprises the following steps:

[0043] S11: according to the formula, 20 parts by weight of polyether polyol, 20 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat and 30 parts by weight of isocyanate were weighed;

[0044] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 2500 rpm at 120°C for 1 hour, then lower the temperature to 70°C, add part of isocyanate and react for 1 hour, then add part of isocyanate and react for 1 hour to obtain component A.

[0045] The preparation method of component B comprises the following steps:

[0046] S21: According to the formula, 4 parts by weight of polyether polyol, 30 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat, 0.5 parts by weight of white carbon black, 30 parts by weight of 400-mesh calcium powder, 40 parts of 600-mesh talc, 0.5 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.5 parts by weight of dispersant, 0.5 parts by weight of foam leveling agent, 0.5 parts by weight of toner and 10 parts by weight of runway drying agent were weighed;

[0047] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, runway drying agent and color powder into another reaction kettle and dehydrate at 3000 rpm at 120°C for 1 hour to obtain component B.

[0048] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from 400 g / mol, and the molecular weight of the polyether triol is selected from 3000 g / mol. The isocyanate is toluene diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is benzoyl peroxide.

[0049] Example 2

[0050] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0051] The steps include:

[0052] Step (1): Selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at 260° C. for 20 min, then treating it with a surface treatment agent for 25 min, and finally washing and drying it to obtain a pretreated glass fiber mesh;

[0053] Step (2): preparing component A;

[0054] Step (3): preparing component B;

[0055] Step (4): Place multiple pretreated glass fiber meshes in a mold, add component A material into material tank A, add component B material into material tank B, adjust the material flow rate of material tank A and material tank B, input component A material and component B material into a mixer in a ratio of 1:1.4 and mix them evenly, transport them to the mold, heat them at 65°C for 15 minutes to solidify, and obtain a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0056] In step (3), a carbon fiber mesh cloth is provided on one side of each glass fiber mesh, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

[0057] The surface treatment agent in step (3) comprises the following raw materials in parts by weight: 0.7 parts of a film-forming agent, 0.7 parts of an antistatic agent SN, 1 part of a silane coupling agent and 92 parts of a solvent.

[0058] The preparation steps of the surface treatment agent in step (3) include: firstly adjusting the pH of the solvent to 4 using an organic acid or salt, adding a silane coupling agent to the solvent, stirring fully until the surface treatment agent is transparent, then adding a film-forming agent, an antistatic agent and a surfactant, and continuing to stir fully to obtain the surface treatment agent.

[0059] The film-forming agent is a small molecule wax of polyethylene and / or a small molecule wax of polypropylene; the solvent is one or a mixture of several of benzene, toluene, ethanol, acetone and water.

[0060] The preparation method of component A comprises the following steps:

[0061] S11: according to the formula, 50 parts by weight of polyether polyol, 13 parts by weight of 52# chlorinated paraffin, 8 parts by weight of vegetable fat and 15 parts by weight of isocyanate were weighed;

[0062] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 2800 rpm at 120°C for 1.5 hours, then lower the temperature to 75°C, add part of isocyanate and react for 1.5 hours, then add part of isocyanate and react for 1.5 hours to obtain component A.

[0063] The preparation method of component B comprises the following steps:

[0064] S21: According to the formula, 10 parts by weight of polyether polyol, 15 parts by weight of 52# chlorinated paraffin, 8 parts by weight of vegetable fat, 0.3 parts by weight of white carbon black, 15 parts by weight of 400-mesh calcium powder, 25 parts of 600-mesh talc, 0.3 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.3 parts by weight of dispersant, 0.3 parts by weight of foam leveling agent, 0.3 parts by weight of toner and 5 parts by weight of runway drying agent were weighed;

[0065] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, track drying agent and color powder into another reaction kettle and dehydrate at 3200 rpm at 120°C for 1.5 hours to obtain component B.

[0066] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from a mixture of 400 g / mol and 1000 g / mol, and the molecular weight of the polyether triol is selected from 5000 g / mol. The isocyanate is diphenylmethane diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is diisopropylbenzene peroxide.

[0067] Example 3

[0068] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0069] The steps include:

[0070] Step (1): Selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at 280° C. for 25 minutes, then treating it with a surface treatment agent for 25 minutes, and finally washing and drying it to obtain a pretreated glass fiber mesh;

[0071] Step (2): preparing component A;

[0072] Step (3): preparing component B;

[0073] Step (4): Place multiple pretreated glass fiber meshes in a mold, add component A material into material tank A, add component B material into material tank B, adjust the material flow rate of material tank A and material tank B, input component A material and component B material into a mixer in a ratio of 1:1.4 and mix them evenly, transport them to the mold, heat them at 65°C for 15 minutes to solidify, and obtain a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0074] In step (3), a carbon fiber mesh cloth is provided on one side of each glass fiber mesh, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

[0075] The surface treatment agent in step (3) comprises the following raw materials in parts by weight: 0.8 parts of a film-forming agent, 0.8 parts of an antistatic agent SN, 2 parts of a silane coupling agent and 94 parts of a solvent.

[0076] The preparation steps of the surface treatment agent in step (3) include: firstly adjusting the pH of the solvent to 5 using an organic acid or salt, adding a silane coupling agent to the solvent, stirring fully until the surface treatment agent is transparent, then adding a film-forming agent, an antistatic agent and a surfactant, and continuing to stir fully to obtain the surface treatment agent.

[0077] The film-forming agent is polyethylene small molecule wax and / or polypropylene small molecule wax; the solvent is a mixture of benzene and toluene.

[0078] The preparation method of component A comprises the following steps:

[0079] S11: according to the formula, 60 parts by weight of polyether polyol, 15 parts by weight of 52# chlorinated paraffin, 12 parts by weight of vegetable fat and 20 parts by weight of isocyanate were weighed;

[0080] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 2800 rpm at 120°C for 1.5 hours, then lower the temperature to 75°C, add part of isocyanate and react for 1.5 hours, then add part of isocyanate and react for 1.5 hours to obtain component A.

[0081] The preparation method of component B comprises the following steps:

[0082] S21: According to the formula, 15 parts by weight of polyether polyol, 20 parts by weight of 52# chlorinated paraffin, 10 parts by weight of vegetable fat, 0.4 parts by weight of white carbon black, 20 parts by weight of 400-mesh calcium powder, 30 parts of 600-mesh talc, 0.4 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.4 parts by weight of dispersant, 0.4 parts by weight of foam leveling agent, 0.4 parts by weight of toner and 8 parts by weight of runway drying agent were weighed;

[0083] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, track drying agent and color powder into another reaction kettle and dehydrate at 3200 rpm at 120°C for 1.5 hours to obtain component B.

[0084] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from a mixture of 400 g / mol, 1000 g / mol and 2000 g / mol, and the molecular weight of the polyether triol is selected from a mixture of 3000 g / mol and 5000 g / mol. The isocyanate is toluene diisocyanate and diphenylmethane diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is benzoyl peroxide and diisopropylbenzene peroxide.

[0085] Example 4

[0086] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0087] The steps include:

[0088] Step (1): Selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at 300° C. for 30 minutes, then treating it with a surface treatment agent for 30 minutes, and finally washing and drying it to obtain a pretreated glass fiber mesh;

[0089] Step (2): preparing component A;

[0090] Step (3): preparing component B;

[0091] Step (4): Place multiple pretreated glass fiber meshes in a mold, add component A material into material tank A, add component B material into material tank B, adjust the material flow rate of material tank A and material tank B, input component A material and component B material into a mixer in a ratio of 1:1.4 and mix them evenly, transport them to the mold, heat them at 65°C for 20 minutes to solidify, and obtain a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0092] In step (3), a carbon fiber mesh cloth is provided on one side of each glass fiber mesh, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

[0093] The surface treatment agent in step (3) comprises the following raw materials in parts by weight: 1 part of film-forming agent, 0.5 parts of antistatic agent SN, 0.5 parts of silane coupling agent and 90 parts of solvent.

[0094] The preparation steps of the surface treatment agent in step (3) include: firstly adjusting the pH of the solvent to 5 using an organic acid or salt, adding a silane coupling agent to the solvent, stirring fully until the surface treatment agent is transparent, then adding a film-forming agent, an antistatic agent and a surfactant, and continuing to stir fully to obtain the surface treatment agent.

[0095] The film-forming agent is a small molecule wax of polyethylene and / or a small molecule wax of polypropylene; the solvent is one or a mixture of several of benzene, toluene, ethanol, acetone and water.

[0096] The preparation method of component A comprises the following steps:

[0097] S11: according to the formula, 70 parts by weight of polyether polyol, 10 parts by weight of 52# chlorinated paraffin, 2 parts by weight of vegetable fat and 10 parts by weight of isocyanate were weighed;

[0098] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 3000 rpm at 120°C for 2 hours, then lower the temperature to 80°C, add part of isocyanate and react for 2 hours, then add part of isocyanate and react for 2 hours to obtain component A.

[0099] The preparation method of component B comprises the following steps:

[0100] S21: According to the formula, 20 parts by weight of polyether polyol, 10 parts by weight of 52# chlorinated paraffin, 2 parts by weight of vegetable fat, 0.1 parts by weight of white carbon black, 10 parts by weight of 400-mesh calcium powder, 20 parts of 600-mesh talc, 0.1 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.1 parts by weight of dispersant, 0.1 parts by weight of foam leveling agent, 0.1 parts by weight of toner and 1 part by weight of runway drying agent were weighed;

[0101] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, track drying agent and color powder into another reactor and dehydrate at 3500 rpm at 120°C for 2 hours to obtain component B.

[0102] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from 2000 g / mol, and the molecular weight of the polyether triol is selected from a mixture of 3000 g / mol and 5000 g / mol. The isocyanate is toluene diisocyanate and diphenylmethane diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is diisopropylbenzene peroxide.

[0103] Comparative Example 1

[0104] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0105] The steps include:

[0106] Step (1): preparing component A;

[0107] Step (2): preparing component B;

[0108] Step (3): Add component A material into material tank A, add component B material into material tank B, adjust the material flow rate of output of material tank A and material tank B, input component A material and component B material into the mixer in a ratio of 1:1.4 and mix them evenly, convey them to the mold and heat them at 65°C for 10 minutes to cure, so as to obtain a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0109] The preparation method of component A comprises the following steps:

[0110] S11: according to the formula, 20 parts by weight of polyether polyol, 20 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat and 30 parts by weight of isocyanate were weighed;

[0111] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 2500 rpm at 120°C for 1 hour, then lower the temperature to 70°C, add part of isocyanate and react for 1 hour, then add part of isocyanate and react for 1 hour to obtain component A.

[0112] The preparation method of component B comprises the following steps:

[0113] S21: According to the formula, 4 parts by weight of polyether polyol, 30 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat, 0.5 parts by weight of white carbon black, 30 parts by weight of 400-mesh calcium powder, 40 parts of 600-mesh talc, 0.5 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.5 parts by weight of dispersant, 0.5 parts by weight of foam leveling agent, 0.5 parts by weight of toner and 10 parts by weight of runway drying agent were weighed;

[0114] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, runway drying agent and color powder into another reaction kettle and dehydrate at 3000 rpm at 120°C for 1 hour to obtain component B.

[0115] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from 400 g / mol, and the molecular weight of the polyether triol is selected from 3000 g / mol. The isocyanate is toluene diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is benzoyl peroxide.

[0116] Comparative Example 2

[0117] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0118] The steps include:

[0119] Step (1): Selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at a temperature of 250-300° C. for 15 minutes, then treating it with a surface treatment agent for 20 minutes, and finally washing and drying to obtain a pretreated glass fiber mesh;

[0120] Step (2): preparing component A;

[0121] Step (3): preparing component B;

[0122] Step (4): placing a plurality of pretreated glass fiber meshes in a mold, adding component A material into a material tank A, adding component B material into a material tank B, adjusting the material flow rate outputted by the material tanks A and B, inputting component A material and component B material into a mixer in a ratio of 1:1.4 and mixing them uniformly, conveying them to the mold and heating them at 65°C for 10 minutes to cure, thereby obtaining a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0123] The surface treatment agent in step (3) comprises the following raw materials in parts by weight: 0.5 parts of a film-forming agent, 1 part of an antistatic agent SN, 3 parts of a silane coupling agent and 95 parts of a solvent.

[0124] The preparation steps of the surface treatment agent in step (3) include: firstly adjusting the pH of the solvent to 4 using an organic acid or salt, adding a silane coupling agent to the solvent, stirring fully until the surface treatment agent is transparent, then adding a film-forming agent, an antistatic agent and a surfactant, and continuing to stir fully to obtain the surface treatment agent.

[0125] The film-forming agent is a small molecule wax of polyethylene and / or a small molecule wax of polypropylene; the solvent is a mixture of benzene, toluene, ethanol, acetone and water.

[0126] The preparation method of component A comprises the following steps:

[0127] S11: according to the formula, 20 parts by weight of polyether polyol, 20 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat and 30 parts by weight of isocyanate were weighed;

[0128] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 2500 rpm at 120°C for 1 hour, then lower the temperature to 70°C, add part of isocyanate and react for 1 hour, then add part of isocyanate and react for 1 hour to obtain component A.

[0129] The preparation method of component B comprises the following steps:

[0130] S21: According to the formula, 4 parts by weight of polyether polyol, 30 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat, 0.5 parts by weight of white carbon black, 30 parts by weight of 400-mesh calcium powder, 40 parts of 600-mesh talc, 0.5 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.5 parts by weight of dispersant, 0.5 parts by weight of foam leveling agent, 0.5 parts by weight of toner and 10 parts by weight of runway drying agent were weighed;

[0131] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, runway drying agent and color powder into another reaction kettle and dehydrate at 3000 rpm at 120°C for 1 hour to obtain component B.

[0132] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from 400 g / mol, and the molecular weight of the polyether triol is selected from 3000 g / mol. The isocyanate is toluene diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is benzoyl peroxide.

[0133] Comparative Example 3

[0134] A method for preparing a prefabricated polyurethane runway material for preventing thermal expansion and contraction, comprising the following steps:

[0135] The steps include:

[0136] Step (1): Select a glass fiber mesh;

[0137] Step (2): preparing component A;

[0138] Step (3): preparing component B;

[0139] Step (4): Place multiple glass fiber meshes in a mold, add component A material into a material tank A, add component B material into a material tank B, adjust the material flow rates of the outputs of the material tanks A and B, input component A material and component B material into a mixer in a ratio of 1:1.4 and mix them evenly, transport them to the mold, heat them at 65°C for 10 minutes to solidify, and obtain a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

[0140] In step (3), a carbon fiber mesh cloth is provided on one side of each glass fiber mesh, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

[0141] The preparation method of component A comprises the following steps:

[0142] S11: according to the formula, 20 parts by weight of polyether polyol, 20 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat and 30 parts by weight of isocyanate were weighed;

[0143] S12: Add polyether polyol, 52# chlorinated paraffin and vegetable fat into a reactor and dehydrate at 2500 rpm at 120°C for 1 hour, then lower the temperature to 70°C, add part of isocyanate and react for 1 hour, then add part of isocyanate and react for 1 hour to obtain component A.

[0144] The preparation method of component B comprises the following steps:

[0145] S21: According to the formula, 4 parts by weight of polyether polyol, 30 parts by weight of 52# chlorinated paraffin, 15 parts by weight of vegetable fat, 0.5 parts by weight of white carbon black, 30 parts by weight of 400-mesh calcium powder, 40 parts of 600-mesh talc, 0.5 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.5 parts by weight of dispersant, 0.5 parts by weight of foam leveling agent, 0.5 parts by weight of toner and 10 parts by weight of runway drying agent were weighed;

[0146] S22: Add polyether polyol, 52# environmentally friendly chlorinated paraffin, vegetable ester, white carbon black, 400 mesh calcium powder, 600 mesh talc, MOCA, dispersant, foaming agent, runway drying agent and color powder into another reaction kettle and dehydrate at 3000 rpm at 120°C for 1 hour to obtain component B.

[0147] The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from 400 g / mol, and the molecular weight of the polyether triol is selected from 3000 g / mol. The isocyanate is toluene diisocyanate. The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is benzoyl peroxide.

[0148] The thermal expansion and contraction-resistant prefabricated polyurethane runway materials of Examples 1 to 4 and Comparative Examples 1 to 3 were subjected to a unified experimental comparison, and the hardness, tensile strength, elongation at break and expansion rate and other data were measured; the hardness was tested according to the standard GB / T14833-93; the impact absorption, tensile strength and elongation at break were tested according to the standard GB / 36246-2018, and the expansion rate test standard was to place the same sample in -20°C, 20°C and 60°C environments for 12 hours, test its size, and measure the average value of its expansion rate. The specific test results are shown in Table 1.

[0149] Table 1

[0150]

[0151] From the technical parameters, the prefabricated polyurethane runway material for preventing thermal expansion and contraction of the present invention achieves a lower expansion rate, and has excellent impact resistance, tensile strength and elongation at break; through comparison before and after aging, it is found that the aging resistance is excellent.

[0152] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a prefabricated polyurethane runway material that prevents thermal expansion and contraction, characterized in that: The steps include: Step (1): selecting a glass fiber mesh for surface pretreatment; first heat treating the glass fiber mesh at a temperature of 250 to 300° C. for 15 to 30 minutes, then treating it with a surface treatment agent for 20 to 30 minutes, and finally washing and drying to obtain the pretreated glass fiber mesh; Step (2): preparing component A; Step (3): preparing component B; Step (4): placing a plurality of pretreated glass fiber meshes in a mold, adding the component A material into the A material cylinder, adding the component B material into the B material cylinder, adjusting the material flow rates outputted from the A material cylinder and the B material cylinder, inputting the component A material and the component B material into a mixer in a ratio of 1:1.4 and mixing them uniformly, conveying them to the mold and heating them at 65°C for 10 to 20 minutes to cure them, thereby obtaining a prefabricated polyurethane runway material that is resistant to thermal expansion and contraction.

2. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 1, characterized in that: In the step (3), a carbon fiber mesh cloth is disposed on one side of each of the glass fiber meshes, and the glass fiber mesh and the carbon fiber mesh cloth are connected with resin.

3. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 1, characterized in that: The surface treatment agent in step (3) comprises the following raw materials in parts by weight: 0.5 to 1 part of a film-forming agent, 0.5 to 1 part of an antistatic agent SN, 0.5 to 3 parts of a silane coupling agent and 90 to 95 parts of a solvent.

4. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 3, characterized in that: The preparation steps of the surface treatment agent in step (3) include: firstly adjusting the pH of the solvent to 4-5 using an organic acid or salt, adding the silane coupling agent to the solvent, stirring sufficiently until the surface treatment agent is transparent, then adding the film-forming agent, the antistatic agent and the surfactant, and continuing to stir sufficiently to obtain the surface treatment agent.

5. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 3, characterized in that: The film former is a small molecule wax of polyethylene and / or a small molecule wax of polypropylene; the solvent is one or a mixture of several of benzene, toluene, ethanol, acetone and water.

6. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 1, characterized in that: The preparation method of the component A comprises the following steps: S11: according to the formula, 20 to 70 parts by weight of polyether polyol, 10 to 20 parts by weight of 52# chlorinated paraffin, 2 to 15 parts by weight of vegetable fat and 10 to 30 parts by weight of isocyanate are weighed; S12: Add the polyether polyol, the 52# chlorinated paraffin and the vegetable fat into a reaction kettle and dehydrate at 2500-3000 rpm at 120°C for 1-2 hours, then lower the temperature to 70-80°C, add part of the isocyanate and react for 1-2 hours, then add part of the isocyanate and react for 1-2 hours to obtain the component A.

7. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 1, characterized in that: The preparation method of the component B comprises the following steps: S21: According to the formula, 4 to 20 parts by weight of polyether polyol, 10 to 30 parts by weight of 52# chlorinated paraffin, 2 to 15 parts by weight of vegetable fat, 0.1 to 0.5 parts by weight of white carbon black, 10 to 30 parts by weight of 400 mesh calcium powder, 20 to 40 parts of 600 mesh talc, 0.1 to 0.5 parts by weight of 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), 0.1 to 0.5 parts by weight of dispersant, 0.1 to 0.5 parts by weight of uniform foaming agent, 0.1 to 0.5 parts by weight of toner and 1 to 10 parts by weight of runway drying agent are weighed; S22: Add the polyether polyol, the 52# environmentally friendly chlorinated paraffin, the plant ester, the white carbon black, the 400 mesh calcium powder, the 600 mesh talc, the 4,4'-diamino-3,3'-dichlorodiphenylmethane (MOCA), the dispersant, the foam leveling agent, the runway drying agent and the color powder into another reaction kettle at 3000-3500 rpm and 120° C. for dehydration for 1-2 hours to obtain the B component.

8. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 6 or 7, characterized in that: The polyether polyol is a polyether diol or / and a polyether triol; the molecular weight of the polyether diol is selected from one or a mixture of 400 g / mol, 1000 g / mol and 2000 g / mol, and the molecular weight of the polyether triol is selected from 3000 g / mol, 5000 g / mol or a mixture thereof.

9. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 6, characterized in that: The isocyanate is toluene diisocyanate and / or diphenylmethane diisocyanate.

10. The method for preparing the prefabricated polyurethane runway material for preventing thermal expansion and contraction according to claim 7, characterized in that: The dispersant is dispersant C-103, the foam leveling agent is foam leveling agent L-1506, and the runway drying agent is one of benzoyl peroxide and diisopropylbenzene peroxide.

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