Two-component polyurethane and preparation method and application thereof
阅读说明：本技术 双组分聚氨酯及其制备方法、应用 (Two-component polyurethane and preparation method and application thereof ) 是由 温杰森 于 2021-07-27 设计创作，主要内容包括：本发明涉及一种双组分聚氨酯的制备方法,所述双组分聚氨酯包括甲组分和乙组分,包括如下步骤：制备所述甲组分：将10份二季戊四醇五丙烯酸酯与40～110份氢封端有机硅油混合,在催化条件下加热反应,分离反应产物,制备含羟基有机硅油；将100份聚酯二元醇加热脱水,制备无水聚酯二元醇；向所述无水聚酯二元醇中依次加入30～80份芳香族二异氰酸酯、2～10份三羟甲基丙烷以及30～80份所述含羟基有机硅油,反应,制备所述甲组分；制备所述乙组分：将100份聚醚三元醇、5～40份硬泡聚醚、10～40份聚四氢呋喃二醇、0.1～10份催化剂、100～300份填料以及30～80份降粘剂混合,加热脱水,制备所述乙组分。制备得到的双组份聚氨酯不仅可以提高交联度,还能提升耐老化的性能。(The invention relates to a preparation method of a two-component polyurethane, wherein the two-component polyurethane comprises a component A and a component B, and the preparation method comprises the following steps: preparing the component A: mixing 10 parts of dipentaerythritol pentaacrylate with 40-110 parts of hydrogen-terminated silicone oil, heating and reacting under a catalytic condition, and separating a reaction product to prepare hydroxyl-containing silicone oil; heating and dehydrating 100 parts of polyester dihydric alcohol to prepare anhydrous polyester dihydric alcohol; sequentially adding 30-80 parts of aromatic diisocyanate, 2-10 parts of trimethylolpropane and 30-80 parts of hydroxyl-containing organic silicone oil into the anhydrous polyester dihydric alcohol, and reacting to prepare the component A; preparing the component B: mixing 100 parts of polyether triol, 5-40 parts of hard foam polyether, 10-40 parts of polytetrahydrofuran glycol, 0.1-10 parts of catalyst, 100-300 parts of filler and 30-80 parts of viscosity reducer, and heating and dehydrating to prepare the component B. The prepared double-component polyurethane can improve the crosslinking degree and the aging resistance.)
1. A preparation method of two-component polyurethane is characterized in that the two-component polyurethane comprises a component A and a component B, and the preparation method of the component A and the component B comprises the following steps:
preparing the component A:
mixing 10 parts by mass of dipentaerythritol pentaacrylate with 40-110 parts by mass of hydrogen-terminated silicone oil, heating and reacting under a catalytic condition, and separating a reaction product to prepare hydroxyl-containing silicone oil;
heating and dehydrating 100 parts by mass of polyester dihydric alcohol to prepare anhydrous polyester dihydric alcohol;
sequentially adding 30-80 parts by mass of aromatic diisocyanate, 2-10 parts by mass of trimethylolpropane and 30-80 parts by mass of hydroxyl-containing organic silicone oil into the anhydrous polyester diol, and reacting to prepare the component A;
preparing the component B:
mixing 100 parts of polyether triol, 5-40 parts of hard foam polyether, 10-40 parts of polytetrahydrofuran glycol, 0.1-10 parts of catalyst, 100-300 parts of filler and 30-80 parts of viscosity reducer in parts by mass, and heating and dehydrating to prepare the component B.
2. The method of preparing a two-component polyurethane according to claim 1, wherein the hydrogen-terminated silicone oil is hydrogen-terminated polydimethylmethylhydrosiloxane; and/or the presence of a gas in the gas,
the polyester diol is one or a mixture of more of butanediol adipate diol, neopentyl glycol adipate diol, 1, 3-propylene glycol adipate diol, 1, 2-propylene glycol adipate diol and ethylene glycol adipate diol;
the aromatic diisocyanate is one or a mixture of pure MDI, liquid MDI and TDI; and/or the presence of a gas in the gas,
the polyether triol is polyoxypropylene triol; and/or the presence of a gas in the gas,
the catalyst is one or a mixture of stannous isocyanate, dibutyltin laurate, bismuth neodecanoate and zinc isooctanoate;
the filler is one or more of 400-1250 mesh talcum powder, heavy calcium carbonate, kaolin and titanium dioxide; and/or the presence of a gas in the gas,
the viscosity reducer is one or a mixture of more of chlorinated paraffin-52 and chlorinated palm oil.
3. The method of preparing a two-component polyurethane according to claim 1, wherein the hydrogen-terminated silicone oil has a hydrogen content of 0.1% to 1.2%; and/or the presence of a gas in the gas,
the number average molecular weight of the polyester dihydric alcohol is 1000 g/mol-3000 g/mol; and/or the presence of a gas in the gas,
the number average molecular weight of the polyether triol is 3000 g/mol-5000 g/mol; and/or the presence of a gas in the gas,
the number average molecular weight of the hard foam polyether is 200 g/mol-500 g/mol; and/or the presence of a gas in the gas,
the number average molecular weight of the polytetrahydrofuran diol is 1000g/mol to 3000 g/mol.
4. The method of preparing the two-component polyurethane according to claim 1, wherein the catalytic condition is the addition of chloroplatinic acid during the preparation of the hydroxyl-containing silicone oil.
5. The method for producing the two-component polyurethane according to claim 4, wherein the chloroplatinic acid is 0.2 to 0.8 part by mass.
6. The method for preparing the two-component polyurethane according to claim 1, wherein the heating reaction comprises the following specific steps in the process of preparing the hydroxyl group-containing silicone oil: reacting for 6-10 h at the temperature of 70-90 ℃; and/or the presence of a gas in the gas,
in the process of preparing the hydroxyl-containing organic silicone oil, the method for separating the reaction product is reduced pressure distillation, and the reduced pressure distillation comprises the following specific steps: heating the reaction system to 100-180 ℃, and distilling under reduced pressure for 30-180 min under the condition of negative pressure; and/or the presence of a gas in the gas,
in the process of preparing the anhydrous polyester diol, the specific steps of heating and dehydrating are as follows: dehydrating for 1-4 h under the condition of negative pressure and the temperature of 100-150 ℃.
7. The method for preparing the two-component polyurethane according to any one of claims 1 to 6, wherein in the process of preparing the A component, after the aromatic diisocyanate is added to the anhydrous polyester diol, the temperature is controlled to be 75-90 ℃, the reaction is carried out for 1-4 h, and then the trimethylolpropane is added after the temperature is reduced to 65-75 ℃; and/or the presence of a gas in the gas,
after the trimethylolpropane is added, the reaction is carried out for 1 to 3 hours, the temperature is controlled to be 65 to 75 ℃, and then the hydroxyl-containing organic silicone oil is added; and/or the presence of a gas in the gas,
after the hydroxyl-containing organic silicon oil is added, the reaction is carried out for 1 to 3 hours, and the temperature is controlled to be 65 to 75 ℃.
8. The method for preparing the two-component polyurethane according to any one of claims 1 to 6, wherein the specific steps of heating and dehydrating in the process of preparing the B component are as follows: dehydrating for 2-4 h under the condition of negative pressure and the temperature of 100-150 ℃.
9. A two-component polyurethane obtained by the method for producing a two-component polyurethane according to any one of claims 1 to 8.
10. A method for preparing a plastic track material, which is characterized in that the two-component polyurethane of claim 9 is mixed according to the proportion of 1 part of the component a and 2-4 parts of the component b, and is cured for 5-15 days.
11. A plastic track material, characterized in that it is prepared by the method of claim 10.
12. A plastic track, characterized in that it is made of the plastic track material according to claim 11.
Technical Field
The invention relates to the field of sports terrace materials, in particular to bi-component polyurethane and a preparation method and application thereof.
Background
With the increasing emphasis on physical health of the nation, people are interested in sports activities, track and field sports are one of the most common sports activities, and a common track and field sports ground is made of a pouring type plastic track or a prefabricated type plastic track. The prefabricated plastic track has high cost, high field flatness and not wide application, and compared with the prefabricated plastic track, the prefabricated plastic track has low cost, low requirement on the field flatness and wider application.
In the traditional technology, a method of mixing and stirring two-component polyurethane on site and then paving is generally adopted for a pouring type plastic track material, the used polyurethane has the advantages of high strength, good toughness and the like, but the aging resistance is poor, a method of adding a large amount of antioxidants and ultraviolet absorbers into the polyurethane material is generally adopted to improve the aging resistance, and the maintenance time is short.
Disclosure of Invention
Based on this, there is a need to provide two-component polyurethanes, their preparation and use, which are capable of improving the aging resistance.
The invention provides a preparation method of a two-component polyurethane, wherein the two-component polyurethane comprises a component A and a component B, and the preparation method of the component A and the component B comprises the following steps:
preparing the component A:
mixing 10 parts by mass of dipentaerythritol pentaacrylate with 40-110 parts by mass of hydrogen-terminated silicone oil, heating and reacting under a catalytic condition, and separating a reaction product to prepare hydroxyl-containing silicone oil;
heating and dehydrating 100 parts by mass of polyester dihydric alcohol to prepare anhydrous polyester dihydric alcohol;
sequentially adding 30-80 parts by mass of aromatic diisocyanate, 2-10 parts by mass of trimethylolpropane and 30-80 parts by mass of hydroxyl-containing organic silicone oil into the anhydrous polyester diol, and reacting to prepare the component A;
preparing the component B:
mixing 100 parts of polyether triol, 5-40 parts of hard foam polyether, 10-40 parts of polytetrahydrofuran glycol, 0.1-10 parts of catalyst, 100-300 parts of filler and 30-80 parts of viscosity reducer in parts by mass, and heating and dehydrating to prepare the component B.
In one embodiment, the hydrogen-terminated silicone oil is hydrogen-terminated polydimethylmethylhydrosiloxane; and/or the presence of a gas in the gas,
the polyester diol is one or a mixture of more of butanediol adipate diol, neopentyl glycol adipate diol, 1, 3-propylene glycol adipate diol, 1, 2-propylene glycol adipate diol and ethylene glycol adipate diol;
the aromatic diisocyanate is one or a mixture of pure MDI, liquid MDI and TDI; and/or the presence of a gas in the gas,
the polyether triol is polyoxypropylene triol; and/or the presence of a gas in the gas,
the catalyst is one or a mixture of stannous isocyanate, dibutyltin laurate, bismuth neodecanoate and zinc isooctanoate;
the filler is one or more of 400-1250 mesh talcum powder, heavy calcium carbonate, kaolin and titanium dioxide; and/or the presence of a gas in the gas,
the viscosity reducer is one or a mixture of more of chlorinated paraffin-52 and chlorinated palm oil.
In one embodiment, the hydrogen-terminated silicone oil has a hydrogen content of 0.1% to 1.2%; and/or the presence of a gas in the gas,
the number average molecular weight of the polyester dihydric alcohol is 1000 g/mol-3000 g/mol; and/or the presence of a gas in the gas,
the number average molecular weight of the polyether triol is 3000 g/mol-5000 g/mol; and/or the presence of a gas in the gas,
the number average molecular weight of the hard foam polyether is 200 g/mol-500 g/mol; and/or the presence of a gas in the gas,
the number average molecular weight of the polytetrahydrofuran diol is 1000g/mol to 3000 g/mol.
In one embodiment, the catalytic condition is the addition of chloroplatinic acid during the preparation of the hydroxyl-containing silicone oil.
In one embodiment, the mass part of the chloroplatinic acid is 0.2-0.8.
In one embodiment, in the process of preparing the hydroxyl group-containing silicone oil, the heating reaction comprises the following specific steps: reacting for 6-10 h at the temperature of 70-90 ℃; and/or the presence of a gas in the gas,
in the process of preparing the hydroxyl-containing organic silicone oil, the method for separating the reaction product is reduced pressure distillation, and the reduced pressure distillation comprises the following specific steps: heating the reaction system to 100-180 ℃, and distilling under reduced pressure for 30-180 min under the condition of negative pressure; and/or the presence of a gas in the gas,
in the process of preparing the anhydrous polyester diol, the specific steps of heating and dehydrating are as follows: dehydrating for 1-4 h under the condition of negative pressure and the temperature of 100-150 ℃.
In one embodiment, in the process of preparing the A component, after the aromatic diisocyanate is added into the anhydrous polyester diol, the temperature is controlled to be 75-90 ℃, the reaction is carried out for 1-4 h, and then the trimethylolpropane is added after the temperature is reduced to 65-75 ℃; and/or the presence of a gas in the gas,
after the trimethylolpropane is added, the reaction is carried out for 1 to 3 hours, the temperature is controlled to be 65 to 75 ℃, and then the hydroxyl-containing organic silicone oil is added; and/or the presence of a gas in the gas,
after the hydroxyl-containing organic silicon oil is added, the reaction is carried out for 1 to 3 hours, and the temperature is controlled to be 65 to 75 ℃.
In one embodiment, in the process of preparing the component b, the specific steps of heating and dehydrating are as follows: dehydrating for 2-4 h under the condition of negative pressure and the temperature of 100-150 ℃.
The invention also provides a two-component polyurethane prepared by the preparation method of the two-component polyurethane in any embodiment.
The invention also provides a preparation method of the plastic track material, wherein the double-component polyurethane is mixed according to the proportion of 1 part of the component A and 2-4 parts of the component B, and is cured for 5-15 days.
The invention also provides a plastic track material prepared by the preparation method of the plastic track material.
The invention also provides a plastic track which is formed by paving the plastic track material.
The component A is prepared by carrying out hydrosilylation on dipentaerythritol pentaacrylate and hydrogen-terminated organic silicon oil, and organic silicon oil containing hydroxyl is introduced into branched isocyanate-terminated polyurethane prepolymer to form organic silicon modified isocyanate prepolymer with a specific multi-branched structure. The multifunctional polyether structure formed by the component B is mixed with the component A to generate crosslinking reaction when the two-component polyurethane is prepared, so that the specific two-component polyurethane with a highly crosslinked structure is formed, and the improvement of the tensile strength, the elongation at break and the aging resistance of the plastic track material is facilitated.
Detailed Description
In order to facilitate understanding of the present invention, the two-component polyurethane of the present invention, its preparation method and use are more fully described below with reference to examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
An embodiment of the invention provides a preparation method of a two-component polyurethane, the two-component polyurethane comprises a component A and a component B, and the preparation steps comprise the preparation of the component A and the preparation of the component B.
The step of preparing the A component includes the following S110 to S130.
S110: mixing 10 parts by mass of dipentaerythritol pentaacrylate with 40-110 parts by mass of hydrogen-terminated silicone oil, heating and reacting under a catalytic condition, and separating a reaction product to prepare the hydroxyl-containing silicone oil.
Further, by mass, mixing 10 parts of dipentaerythritol pentaacrylate with 60-100 parts of hydrogen-terminated silicone oil, heating and reacting under a catalytic condition, and separating a reaction product to prepare the hydroxyl-containing silicone oil. Dipentaerythritol pentaacrylate and hydrogen terminated organic silicone oil can be used for preparing a multi-branched silica structure with a specific structure under a catalytic condition.
In one particular example, the hydrogen-terminated silicone oil may be a hydrogen-terminated polydimethylmethylhydrosiloxane.
In one particular example, the hydrogen-terminated silicone oil has a hydrogen content of 0.1% to 1.2%. Further, the hydrogen content of the hydrogen-terminated silicone oil is 0.22-0.82%.
In a specific example, in the preparation of the hydroxyl group-containing silicone oil, the catalytic conditions may be a method of adding a catalyst, and specifically, a chloroplatinic acid catalyst may be added. Further, 0.2 to 0.8 part by mass of chloroplatinic acid is added. Further, 0.3 to 0.6 part by mass of chloroplatinic acid is added.
In a specific example, the reaction is promoted by using a suitable temperature condition, and specifically, the reaction can be carried out for 6 to 10 hours under the condition that the temperature is heated to 70 to 90 ℃. More specifically, the reaction can be carried out for 6 to 8 hours under the condition that the temperature is heated to 80 to 90 ℃.
In a specific example, the reaction product is separated after the reaction is completed, and specifically, a reduced pressure distillation method may be employed. Wherein, the vacuum distillation comprises the following specific steps: heating the reaction system to 100-180 ℃, and distilling under reduced pressure for 30-180 min under the condition of negative pressure. Further, the vacuum distillation comprises the following specific steps: heating the reaction system to 120-150 ℃, and distilling under reduced pressure for 30-120 min under the condition of negative pressure.
S120: 100 parts by mass of polyester diol is heated and dehydrated to prepare the anhydrous polyester diol.
Alternatively, the polyester diol is, but is not limited to, a mixture of one or more of butylene adipate diol, neopentyl adipate diol, 1, 3-propylene adipate diol, 1, 2-propylene adipate diol, and ethylene adipate diol. Further, the number average molecular weight of the polyester diol is 1000g/mol to 3000 g/mol.
In a specific example, in the process of preparing the anhydrous polyester diol, the specific steps of heating and dehydrating are as follows: dehydrating for 1-4 h under the condition of negative pressure and the temperature of 100-150 ℃. Further, the specific steps of heating dehydration are as follows: dehydrating for 2-3 h under the condition of negative pressure and the temperature of 100-120 ℃.
S130: according to parts by mass, 30-80 parts of aromatic diisocyanate, 2-10 parts of trimethylolpropane and 30-80 parts of hydroxyl-containing organic silicone oil are sequentially added into anhydrous polyester diol to react to prepare a component A.
Further, 40-60 parts by mass of aromatic diisocyanate, 2-8 parts by mass of trimethylolpropane and 30-60 parts by mass of hydroxyl-containing silicone oil are sequentially added into the anhydrous polyester diol to react to prepare a component A.
Alternatively, the aromatic diisocyanate may be, but is not limited to, one or more of pure MDI, liquid MDI, and TDI.
In a specific example, in the process of preparing the A component, after the aromatic diisocyanate is added into the anhydrous polyester diol, the temperature is controlled to be 75-90 ℃, the reaction is carried out for 1-4 h, and then the temperature is reduced to 65-75 ℃ and then the trimethylolpropane is added. Further, the temperature is controlled to be 75-85 ℃, the reaction is carried out for 1-4 h, then the temperature is reduced to 65-75 ℃, and then trimethylolpropane is added.
In a specific example, after trimethylolpropane is added, the reaction is carried out for 1 to 3 hours, the temperature is controlled to be 65 to 75 ℃, and then the organic silicone oil containing hydroxyl is added.
In a specific example, after the hydroxyl-containing organic silicone oil is added, the reaction is carried out for 1 to 3 hours, and the temperature is controlled to be 65 to 75 ℃.
The preparation method of the component B comprises the following steps: mixing 100 parts of polyether triol, 5-40 parts of hard foam polyether, 10-40 parts of polytetrahydrofuran glycol, 0.1-10 parts of catalyst, 100-300 parts of filler and 30-80 parts of viscosity reducer in parts by mass, heating and dehydrating to prepare the component B.
Further, by mass, 100 parts of polyether triol, 10-20 parts of hard foam polyether, 10-20 parts of polytetrahydrofuran glycol, 0.1-5 parts of catalyst, 200-300 parts of filler and 40-60 parts of viscosity reducer are mixed, heated and dehydrated to prepare the component B.
Alternatively, the polyether triol may be a polyoxypropylene triol. Further, the number average molecular weight of the polyether triol is 3000g/mol to 5000 g/mol.
Alternatively, the catalyst may be, but is not limited to, a mixture of one or more of stannous isocyanate, dibutyltin laurate, bismuth neodecanoate, and zinc isooctanoate.
Alternatively, the filler can be, but is not limited to, one or more of 400-1250 mesh talcum powder, heavy calcium carbonate, kaolin and titanium dioxide. Further, the filler is dehydrated before use.
Alternatively, the viscosity reducer may be, but is not limited to, one or more of chlorinated paraffin-52 and chlorinated palm oil. Further, the viscosity reducer is dehydrated before use.
In a specific example, the number average molecular weight of the rigid foam polyether is from 200g/mol to 500 g/mol.
In a specific example, the polytetrahydrofuran diol has a number average molecular weight of 1000g/mol to 3000 g/mol. The polytetrahydrofuran diol can improve the compatibility of the component A and the component B, so that the reaction is more uniform.
In a specific example, in the process of preparing the component B, the specific steps of heating and dehydrating are as follows: dehydrating for 2-4 h under the condition of negative pressure and the temperature of 100-150 ℃. Further, the specific steps of heating dehydration are as follows: dehydrating for 2-3 h under the condition of negative pressure and the temperature of 100-120 ℃.
The invention further provides a two-component polyurethane prepared by the preparation method of any one of the above specific examples.
The invention also provides a preparation method of the plastic track material, which comprises the steps of mixing 1 part of the component A and 2-4 parts of the component B, and curing.
In a specific example, the maturation time is between 5 days and 15 days. Further, the curing time is 7 to 10 days.
The invention further provides a plastic track material, which is prepared by the preparation method of the plastic track material in any specific example.
The invention further provides a plastic track which is formed by paving the plastic track material in any specific example.
The component A is prepared by carrying out hydrosilylation on dipentaerythritol pentaacrylate and hydrogen-terminated organic silicon oil, and then introducing the hydroxyl-containing organic silicon oil into a branched isocyanate-terminated polyurethane prepolymer to form an organic silicon modified isocyanate prepolymer with a specific multi-branched structure. The multifunctional polyether structure formed by the component B is mixed with the component A to generate crosslinking reaction when the two-component polyurethane is prepared, so that the specific two-component polyurethane with a highly crosslinked structure is formed, the tensile strength, the elongation at break and the aging resistance of the plastic track material can be improved, and the impact absorption and the vertical deformation performance of the plastic track material can be ensured to meet the national standard.
The following are specific examples, and in the following specific examples, all the raw materials may be commercially available unless otherwise specified. Wherein, the hydrogen-terminated polydimethylmethylhydrogensiloxane (with hydrogen content of 0.22-0.28%) is purchased from Ningbo Runzhen high-new materials science and technology Co., Ltd, and has the model of RH-LHC-7; the hydrogen-terminated polydimethylmethylhydrogensiloxane (with a hydrogen content of 0.78-0.82%) is available from Ningbo Runzhe Gaoshen materials science and technology Co., Ltd, and has the model of RH-LHC-3.
Example 1
S1, preparation of a component a by S11 and S12:
s11, adding 10 parts of dipentaerythritol pentaacrylate and 100 parts of hydrogen-terminated polydimethylmethylhydrosiloxane (with the hydrogen content of 0.22-0.28%) into a reaction kettle under the condition of stirring, adding 0.6 part of chloroplatinic acid, and heating to 90 ℃ for reacting for 8 hours. Then heating to 120 ℃, and distilling under reduced pressure of 0.095MPa for 30min to obtain the hydroxyl-containing organic silicon.
S12, adding 100 parts by mass of poly neopentyl glycol adipate diol (Mn is 2000g/mol) into a reaction kettle, heating to 100 ℃, dehydrating for 2 hours under the negative pressure of 0.095MPa, adding 50 parts of 4,4' -diphenylmethane diisocyanate (pure MDI), reacting for 4 hours at the temperature of 75 ℃, reducing to 70 ℃, adding 8 parts of trimethylolpropane, controlling the temperature to 70 ℃, reacting for 1 hour, adding 30 parts of hydroxyl-containing organic silicon prepared by S11, controlling the temperature to 70 ℃, and reacting for 2 hours to obtain a component A.
S2, preparing a component B: 100 parts of polyoxypropylene triol (Mn is 5000g/mol), 20 parts of hard bubble polyether (Mn is 500g/mol), 10 parts of polytetrahydrofuran diol (Mn is 1000g/mol), 0.5 part of bismuth neodecanoate, 0.5 part of zinc isooctanoate, 200 parts of dehydrated 400-mesh talcum powder and 60 parts of dehydrated chlorinated paraffin-52 are mixed by mass, and the mixture is heated to 100 ℃ under the condition of negative pressure of 0.095MPa for dehydration for 2 hours to obtain a component B.
S3, preparing the plastic track material: mixing 1 part by mass of the component A prepared in S1 and 2 parts by mass of the component B prepared in S2, placing the mixture in a casting mold, and curing for 7 days.
Example 2
S1, preparation of a component a by S11 and S12:
s11, adding 10 parts of dipentaerythritol pentaacrylate and 60 parts of hydrogen-terminated polydimethylmethylhydrosiloxane (with the hydrogen content of 0.78-0.82%) into a reaction kettle under the condition of stirring, adding 0.3 part of chloroplatinic acid, and heating to 90 ℃ for reacting for 8 hours. Then heating to 120 ℃, and distilling under reduced pressure of 0.095MPa for 30min to obtain the hydroxyl-containing organic silicon.
S12, adding 100 parts by mass of poly neopentyl glycol adipate diol (Mn is 2000g/mol) into a reaction kettle, heating to 100 ℃, dehydrating for 2 hours under the negative pressure of 0.095MPa, adding 60 parts of 4,4' -diphenylmethane diisocyanate (pure MDI), reacting for 4 hours at the temperature of 75 ℃, reducing to 70 ℃, adding 8 parts of trimethylolpropane, controlling the temperature to 70 ℃, reacting for 1 hour, adding 30 parts of hydroxyl-containing organic silicon prepared by S11, controlling the temperature to 70 ℃, and reacting for 2 hours to obtain a component A.
S2, preparing a component B: 100 parts by mass of polyoxypropylene triol (Mn is 3000g/mol), 10 parts by mass of hard bubble polyether (Mn is 300g/mol), 20 parts by mass of polytetrahydrofuran diol (Mn is 3000g/mol), 0.5 part by mass of bismuth neodecanoate, 0.5 part by mass of zinc isooctanoate, 200 parts by mass of 400-mesh dehydrated talc and 60 parts by mass of dehydrated chloroparaffin-52 are mixed, and the mixture is heated to 100 ℃ under the condition of negative pressure of 0.095MPa and dehydrated for 2 hours to obtain a component B.
S3, preparing the plastic track material: mixing 1 part by mass of the component A prepared in S1 and 2 parts by mass of the component B prepared in S2, placing the mixture in a casting mold, and curing for 7 days.
Comparative example 1
S1, preparation of a component a by S11 and S12:
s11, respectively adding 10 parts of dipentaerythritol pentaacrylate and 100 parts of hydrogen-terminated polydimethylmethylhydrosiloxane (with the hydrogen content of 0.22-0.28%) into a reaction kettle under the condition of stirring, mixing, and heating to 90 ℃ for reacting for 8 hours to obtain a mixture of dipentaerythritol pentaacrylate and hydrogen-terminated polydimethylmethylhydrosiloxane.
S12, adding 100 parts by mass of poly neopentyl glycol adipate diol (Mn is 2000g/mol) into a reaction kettle, heating to 100 ℃, dehydrating for 2 hours under the negative pressure of 0.095MPa, adding 50 parts of 4,4' -diphenylmethane diisocyanate (pure MDI), reacting for 4 hours at the temperature of 75 ℃, reducing to 70 ℃, adding 8 parts of trimethylolpropane, controlling the temperature to 70 ℃, reacting for 1 hour, adding 30 parts of hydroxyl-containing organic silicon prepared by S11, controlling the temperature to 70 ℃, and reacting for 2 hours to obtain a component A.
S2, preparing a component B: 100 parts by mass of polyoxypropylene triol (Mn of 5000g/mol), 20 parts by mass of hard bubble polyether (Mn of 500g/mol), 10 parts by mass of polytetrahydrofuran diol (Mn of 1000g/mol), 0.5 part by mass of bismuth neodecanoate, 0.5 part by mass of zinc isooctanoate, 200 parts by mass of 400-mesh dehydrated talc and 60 parts by mass of dehydrated chloroparaffin-52 are mixed, and the mixture is heated to 100 ℃ under the condition of negative pressure of 0.095MPa and dehydrated for 2 hours to obtain a component B.
S3, preparing the plastic track material: mixing 1 part by mass of the component A prepared in S1 and 2 parts by mass of the component B prepared in S2, placing the mixture in a casting mold, and curing for 7 days.
Comparative example 2
S1, preparation of a component a by S11 and S12:
s11, adding 10 parts of dipentaerythritol pentaacrylate and 100 parts of hydrogen-terminated polydimethylmethylhydrosiloxane (with the hydrogen content of 0.22-0.28%) into a reaction kettle under the condition of stirring, adding 0.6 part of chloroplatinic acid, and heating to 90 ℃ for reacting for 8 hours. Then heating to 120 ℃, and distilling under reduced pressure of 0.095MPa for 30min to obtain the hydroxyl-containing organic silicon.
S12, adding 100 parts by mass of polyoxypropylene glycol (Mn is 2000g/mol), heating to 100 ℃, dehydrating at 0.095MPa for 2h, adding 50 parts of 4,4' -diphenylmethane diisocyanate (pure MDI), reacting at 75 ℃ for 4h, reducing to 70 ℃, adding 8 parts of trimethylolpropane, controlling the temperature to 70 ℃, reacting for 1h, adding 30 parts of S11 to obtain hydroxyl-containing organic silicon, controlling the temperature to 70 ℃, and reacting for 2h to obtain the component A.
S2, preparing a component B: 100 parts by mass of polyoxypropylene triol (Mn of 5000g/mol), 20 parts by mass of hard bubble polyether (Mn of 500g/mol), 10 parts by mass of polytetrahydrofuran diol (Mn of 1000g/mol), 0.5 part by mass of bismuth neodecanoate, 0.5 part by mass of zinc isooctanoate, 200 parts by mass of 400-mesh dehydrated talc and 60 parts by mass of dehydrated chloroparaffin-52 are mixed, and the mixture is heated to 100 ℃ under the condition of negative pressure of 0.095MPa and dehydrated for 2 hours to obtain a component B.
S3, preparing the plastic track material: mixing 1 part by mass of the component A prepared in S1 and 2 parts by mass of the component B prepared in S2, placing the mixture in a casting mold, and curing for 7 days.
Comparative example 3
S1, preparation of a component a by S11 and S12:
s11, adding 10 parts of dipentaerythritol pentaacrylate and 100 parts of hydrogen-terminated polydimethylmethylhydrosiloxane (with the hydrogen content of 0.22-0.28%) into a reaction kettle under the condition of stirring, adding 0.6 part of chloroplatinic acid, and heating to 90 ℃ for reacting for 8 hours. Then heating to 120 ℃, and distilling under reduced pressure of 0.095MPa for 30min to obtain the hydroxyl-containing organic silicon.
S12, adding 100 parts by mass of poly neopentyl glycol adipate diol (Mn is 2000g/mol) into a reaction kettle, heating to 100 ℃, dehydrating for 2 hours under the negative pressure of 0.095MPa, adding 50 parts of 4,4' -diphenylmethane diisocyanate (pure MDI), reacting for 4 hours at the temperature of 75 ℃, reducing to 70 ℃, adding 8 parts of trimethylolpropane, controlling the temperature to 70 ℃, reacting for 1 hour, adding 30 parts of hydroxyl-containing organic silicon prepared by S11, controlling the temperature to 70 ℃, and reacting for 2 hours to obtain a component A.
S2, preparing a component B: 100 parts of polyoxypropylene triol (Mn is 5000g/mol), 20 parts of hard foam polyether (Mn is 500g/mol), 0.5 part of bismuth neodecanoate, 0.5 part of zinc isooctanoate, 200 parts of 400-mesh talcum powder and 60 parts of chlorinated paraffin-52 are mixed by mass, and the mixture is heated to 100 ℃ under the condition of negative pressure of 0.095MPa and dehydrated for 2 hours to obtain the component B.
S3, preparing the plastic track material: mixing 1 part by mass of the component A prepared in S1 and 2 parts by mass of the component B prepared in S2, placing the mixture in a casting mold, and curing for 7 days.
Comparative example 4
S1, preparation of a component a by S11 and S12:
s11, adding 10 parts of dipentaerythritol pentaacrylate and 100 parts of hydrogen-terminated polydimethylmethylhydrosiloxane (with the hydrogen content of 0.22-0.28%) into a reaction kettle under the condition of stirring, adding 0.6 part of chloroplatinic acid, and heating to 90 ℃ for reacting for 8 hours. Then heating to 120 ℃, and distilling under reduced pressure of 0.095MPa for 30min to obtain the hydroxyl-containing organic silicon.
S12, adding 100 parts by mass of poly neopentyl glycol adipate diol (Mn is 2000g/mol) into a reaction kettle, heating to 100 ℃, dehydrating for 2h under the negative pressure of 0.095MPa, adding 50 parts of 4,4' -diphenylmethane diisocyanate (pure MDI), reacting for 4h at the temperature of 75 ℃, reducing to 70 ℃, adding 30 parts of hydroxyl-containing organic silicon prepared from S11, and reacting for 2h at the temperature of 70 ℃ to obtain a component A.
S2, preparing a component B: 100 parts of polyoxypropylene triol (Mn is 5000g/mol), 20 parts of hard bubble polyether (Mn is 500g/mol), 10 parts of polytetrahydrofuran diol (Mn is 1000g/mol), 0.5 part of bismuth neodecanoate, 0.5 part of zinc isooctanoate, 200 parts of dehydrated 400-mesh talcum powder and 60 parts of dehydrated chlorinated paraffin-52 are mixed by mass, and the mixture is heated to 100 ℃ under the condition of negative pressure of 0.095MPa for dehydration for 2 hours to obtain a component B.
S3, preparing the plastic track material: mixing 1 part by mass of the component A prepared in S1 and 2 parts by mass of the component B prepared in S2, placing the mixture in a casting mold, and curing for 7 days.
The plastic track materials prepared in examples 1 to 2 and comparative examples 1 to 4 were subjected to tensile strength, elongation at break, aging resistance, impact absorption, and vertical deformation performance tests according to national standard GB36246-2018, and the test results are shown in table 1 below.
TABLE 1 test results of the performance of plastic track materials
As can be seen from table 1 above, the plastic track materials prepared in examples 1 to 2 have better tensile strength, elongation at break and aging resistance than those of comparative examples 1 to 4, and the impact absorption and vertical deformation properties meet the national standards.
As can be seen from example 1 and comparative example 1, the hydroxyl-containing silicone oil is prepared under a catalytic condition, and then introduced into the branched isocyanate-terminated polyurethane prepolymer, so that the finally prepared plastic track material has more excellent tensile strength, elongation at break and aging resistance compared with polyurethane prepared by directly reacting dipentaerythritol pentaacrylate with isocyanate, and the hydrogen-terminated polydimethylmethylhydrosiloxane in comparative example 1 is incompatible with a polyurethane system, thereby having an adverse effect on the performance of the plastic track material.
As can be seen from the example 1 and the comparative example 2, in the process of preparing the component a, the use of the polyester diol is more beneficial to preparing the plastic track material capable of improving the tensile strength, the elongation at break and the aging resistance than the use of the polyether diol.
As can be seen from the example 1 and the comparative example 3, in the process of preparing the component B, the polytetrahydrofuran glycol is added, so that the plastic track material capable of improving the tensile strength, the elongation at break and the aging resistance is favorably prepared.
As can be seen from example 1 and comparative example 4, the addition of trimethylolpropane is beneficial to improving the tensile strength, elongation at break and aging resistance of the plastic track material during the preparation of the A component.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.