Multipurpose polyurethane material and synthesis method thereof

Abstract

The invention discloses a multi-purpose polyurethane material and a synthesis method thereof, and relates to the technical field of polyurethane materials, the multi-purpose polyurethane material comprises the following raw materials by weight: 100 parts of polycarbonate diol, 15-40 parts of p-phenylene diisocyanate, 10-40 parts of hydroquinone dihydroxyethyl ether, 1-5 parts of a coupling agent, 1-5 parts of an antioxidant, 1-5 parts of a coupling agent, and 1-5 parts of a coupling agent. The invention relates to a high-temperature-resistant flame-retardant plastic which is prepared from the following components in parts by weight: 10-15 parts of trimethylolpropane, 2-14 parts of refined bamboo tar, 0.5-1.8 parts of a composite antioxidant and 2.5-3.5 parts of a nano-montmorillonite core-supported catalyst. The polyurethane material provided by the invention has good environmental protection property, hydrolysis resistance, heat resistance and oxidation resistance, and also has excellent durability.

Description

Technical Field

[0001] This application relates to the field of polyurethane material technology, and particularly to a multi-purpose polyurethane material and its synthesis method. Background Art

[0002] Due to its excellent properties, including high strength, wear resistance, good flexibility, and excellent processing performance, polyurethane materials have been widely used in the field of oil drilling and production. These characteristics make it an ideal material for manufacturing key components such as seals, pipe linings, and drill pipe sheaths, capable of effectively coping with complex working conditions such as high temperature, high pressure, mechanical wear, and chemical corrosion during oil drilling and production.

[0003] However, traditional polyurethane materials still have some problems to be solved in practical applications, which limit their further development and application. First of all, although polyurethane materials perform well in many aspects, their durability still needs to be improved. During the long-term operation of oil drilling and production equipment, polyurethane materials will be affected by continuous mechanical stress, chemical erosion, and environmental factors, resulting in a gradual decline in their performance. For example, in a high-temperature environment, polyurethane materials may undergo thermal degradation, causing their molecular chains to break, thereby reducing the mechanical strength of the material. In addition, ultraviolet radiation and oxidation by oxygen will also accelerate the aging process of polyurethane materials. Secondly, the functions of traditional polyurethane materials are relatively single and difficult to meet the increasingly diverse scenario requirements in the field of oil drilling and production. With the continuous development of oil drilling and production technology, the requirements for sealing materials are getting higher and higher, not only requiring good sealing performance, but also other special functions such as heat resistance and antioxidant properties. However, the functional performance of traditional polyurethane materials in these aspects is often not ideal and cannot fully meet the diverse needs under complex working conditions.

[0004] In summary, although polyurethane materials have broad application prospects in the field of oil drilling and production, problems such as their durability, single functionality, and raw material dependence limit their further development. In order to better meet the high-performance requirements of oil drilling and production equipment, developing multi-functional polyurethane materials and endowing polyurethane materials with more functional characteristics has become an important trend in current research and application. Summary of the Invention

[0005] In order to provide an environmentally friendly and high-performance multi-purpose polyurethane material and its synthesis method, to solve the problems of poor environmental friendliness, hydrolysis resistance, heat resistance, and oxidation resistance of traditional polyurethane materials, and endow polyurethane materials with excellent durability, this application provides a multi-purpose polyurethane material and its synthesis method.

[0006] A multi-purpose polyurethane material provided by this application adopts the following technical solutions:

[0007] A multi-purpose polyurethane material, the raw materials by weight include 100 parts of polycarbonate diol, 15 - 40 parts of p-phenylene diisocyanate, 10 - 40 parts of hydroquinone dihydroxyethyl ether, 10 - 15 parts of trimethylolpropane, 2 - 14 parts of refined bamboo tar, 0.5 - 1.8 parts of compound antioxidant, and 2.5 - 3.5 parts of nano-montmorillonite core-loaded catalyst.

[0008] Preferably, the preparation method of the refined bamboo tar includes the following steps:

[0009] S1. Add the original bamboo tar solution to the sodium hydroxide solution, stir at 40 - 50 °C for 20 - 28 h, then perform centrifugal separation and filtration to obtain the sodium hydroxide-treated bamboo tar;

[0010] S2. Add the sodium hydroxide-treated bamboo tar to the hydrochloric acid solution, stir at 30 - 50 °C for 1 - 3 h, then perform centrifugal separation and filtration to obtain the pretreated bamboo tar;

[0011] S3. Add the silane coupling agent to the ethanol aqueous solution, stir well to mix evenly to obtain the silane coupling agent hydrolysis solution; add the pretreated bamboo tar to the silane coupling agent hydrolysis solution, carry out stirring reaction at 60 - 80 °C under water bath conditions for 1 - 2 h, after the reaction is completed, perform centrifugal separation and filtration, and obtain the refined bamboo tar after vacuum drying.

[0012] Preferably, the mass fraction of the sodium hydroxide solution is 11 - 18%; the mass fraction of the hydrochloric acid solution is 1.6 - 3.2%.

[0013] Preferably, the silane coupling agent is one of KH-550, KH-560, KH-570, or 3-isocyanatopropyltriethoxysilane.

[0014] Preferably, the compound antioxidant includes antioxidant XH-245, triphenyl phosphite, and light stabilizer 770; the mass ratio of antioxidant XH-245, triphenyl phosphite, and light stabilizer 770 is 0.2 - 1:0.1 - 0.4:0.1 - 0.4.

[0015] Preferably, the raw materials of the nano-montmorillonite core-loaded catalyst include dibutyltin dilaurate and titanium dioxide pillared nano-montmorillonite, and the mass ratio of the two is 1:1 - 1.2.

[0016] Preferably, the titanium dioxide pillared nano-montmorillonite is prepared from the following raw materials by weight: 1 - 2 parts of sodium-based nano-montmorillonite, 24 - 40 parts of ethanol, 10.2 - 15.3 parts of tetrabutyl titanate, and 100 - 150 parts of deionized water.

[0017] Preferably, the preparation method of the nano-montmorillonite core-loaded catalyst includes the following steps:

[0018] Dibutyltin dilaurate is added to titanium dioxide pillared nanometer montmorillonite, and then it is placed in a dryer for 24 - 32 h to obtain the nanometer montmorillonite core - loaded catalyst.

[0019] The preparation method of the titanium dioxide pillared nanometer montmorillonite includes the following steps:

[0020] 10.2 - 15.3 parts of tetrabutyl titanate are dropped into 8 - 14 parts of ethanol, and stirred at room temperature for 30 - 50 min to obtain a tetrabutyl titanate - ethanol solution; 1 - 2 parts of sodium - based nanometer montmorillonite are dispersed in 16 - 26 parts of ethanol, stirred at room temperature for 1 - 2 h, and then slowly dropped into the tetrabutyl titanate - ethanol solution, and stirred for 6 - 8 h to obtain a mixed solution; the mixed solution is dropped into 100 - 150 parts of deionized water drop by drop, stirred for 10 - 20 min, aged at room temperature for 24 - 30 h, and after centrifugation, washing and drying, titanium dioxide pillared nanometer montmorillonite is obtained.

[0021] This application also provides a synthesis method of a multi - purpose polyurethane material, adopting the following technical scheme:

[0022] A synthesis method of a multi - purpose polyurethane material includes the following steps:

[0023] S1. First, polycarbonate diol is added to a reaction kettle, and then it stays in the reaction kettle at a temperature of 110 - 130 °C and a vacuum degree of 0.06 - 0.07 MPa for 2 - 3 h.

[0024] S2. After cooling to room temperature, p - phenylene diisocyanate is added to the reaction kettle, stirred under nitrogen protection at room temperature to mix evenly, and then gradually heated to 80 - 90 °C for reaction for 1.5 - 2 h.

[0025] S3. After the above reaction is completed, hydroquinone di - hydroxyethyl ether, trimethylolpropane, refined bamboo tar, nanometer montmorillonite core - loaded catalyst, and compound antioxidant are added to the reaction kettle, stirred to mix evenly, and then poured into a mold for curing to obtain a multi - purpose polyurethane material.

[0026] Preferably, the curing includes a first stage and a second stage; the curing temperature in the first stage is 20 - 35 °C, and the curing time is 24 - 48 h; the curing temperature in the second stage is 75 - 85 °C, and the curing time is 4 - 8 h.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By adopting the above technical solutions, the present application uses polycarbonate diol and p-phenylene diisocyanate as the main raw materials, and hydroquinone di(2-hydroxyethyl) ether and trimethylolpropane as crosslinking agents and chain extenders, and can obtain a polyurethane material with excellent mechanical properties; refined bamboo tar is a product of the pyrolysis of natural bamboo, which is green and environmentally friendly. Introducing refined bamboo tar into the polyurethane material can effectively improve its durability; and adding nano-montmorillonite core-loaded catalyst, using titanium dioxide pillared nano-montmorillonite to core-load dibutyltin dilaurate, which slowly releases at room temperature and accelerates release under heating conditions, thereby effectively accelerating the curing of the polyurethane material and effectively improving the stability of the material; compounding antioxidant XH-245, triphenyl phosphite, and light stabilizer 770 as antioxidants, through the synergistic effect of the three, significantly improving the oxidation resistance and service life of the polyurethane material.

[0029] 2. By adopting the above technical solutions, the present application uses sodium hydroxide solution and hydrochloric acid solution to treat the bamboo tar stock solution successively to effectively remove impurities in the bamboo tar, and then further modifies the bamboo tar with a silane coupling agent, effectively improving the interfacial bonding force between the bamboo tar and the polyurethane matrix, and further improving the thermal stability and durability of the polyurethane material;

[0030] 3. By adopting the above technical solutions, the present application uses titanium dioxide pillared nano-montmorillonite to core-load dibutyltin dilaurate. It can not only slowly release the dibutyltin dilaurate catalyst to control the curing time of the polyurethane material, but also the titanium dioxide pillared nano-montmorillonite itself can be evenly dispersed in the polyurethane matrix to form a nano-scale reinforcing phase, absorb and disperse external impact energy, reduce the propagation of cracks, and can maintain structural stability in a high-temperature environment, thereby effectively improving the tensile strength and thermal stability of the polyurethane material. Detailed implementation manners

[0031] The following further elaborates on the present application with reference to examples.

[0032] The chemical reagents used in the preparation examples, examples, and comparative examples provided by the present invention are all commercially available products, and their brands and manufacturers are as follows:

[0033] Polycarbonate diol, Guangdong Wengjiang Chemical Reagent Co., Ltd., molecular weight 2000, viscosity 1000 - 2000;

[0034] p-Phenylene diisocyanate PPDI, Wuhan Huajiu Pharmaceutical Technology Co., Ltd.;

[0035] Antioxidant XH-245, Shanghai Yuanye Biotechnology Co., Ltd.;

[0036] Triphenyl phosphite, Shanghai Macklin Biochemical Co., Ltd., T818852;

[0037] Light stabilizer 770, Hangzhou Jingyou Chemical Co., Ltd.

[0038] Preparation Example 1 Preparation of refined bamboo tar

[0039] Preparation Example 1.1

[0040] S1. Add 10 g of bamboo tar stock solution to 9 g of a sodium hydroxide solution with a mass fraction of 11%, stir at 45 °C for 24 h, then perform centrifugal separation and filtration to obtain sodium hydroxide-treated bamboo tar;

[0041] S2. Add 10 g of sodium hydroxide-treated bamboo tar to 9 g of a hydrochloric acid solution with a mass fraction of 1.6%, stir at 40 °C for 2 h, then perform centrifugal separation and filtration to obtain pretreated bamboo tar;

[0042] S3. Add 0.2 g of silane coupling agent KH-550 to 20 g of an ethanol aqueous solution (mass ratio of ethanol to water is 6:1), stir well to mix evenly to obtain a silane coupling agent hydrolysis solution; add 10 g of pretreated bamboo tar to the silane coupling agent hydrolysis solution, carry out stirring reaction at 60 °C in a water bath for 1 h, after the reaction is completed, perform centrifugal separation and filtration, and obtain refined bamboo tar after vacuum drying.

[0043] Preparation Example 1.2

[0044] S1. Add 10 g of bamboo tar stock solution to 10 g of a sodium hydroxide solution with a mass fraction of 15%, stir at 40 °C for 20 h, then perform centrifugal separation and filtration to obtain sodium hydroxide-treated bamboo tar;

[0045] S2. Add 10 g of sodium hydroxide-treated bamboo tar to 10 g of a hydrochloric acid solution with a mass fraction of 2.4%, stir at 30 °C for 1 h, then perform centrifugal separation and filtration to obtain pretreated bamboo tar;

[0046] S3. Add 0.3 g of silane coupling agent KH-550 to 20 g of an ethanol aqueous solution (mass ratio of ethanol to water is 8:1), stir well to mix evenly to obtain a silane coupling agent hydrolysis solution; add 20 g of pretreated bamboo tar to the silane coupling agent hydrolysis solution, carry out stirring reaction at 70 °C in a water bath for 1.5 h, after the reaction is completed, perform centrifugal separation and filtration, and obtain refined bamboo tar after vacuum drying.

[0047] Preparation Example 1.3

[0048] S1. Add 10 g of bamboo tar stock solution to 11 g of a sodium hydroxide solution with a mass fraction of 18%, stir at 50 °C for 28 h, then perform centrifugal separation and filtration to obtain sodium hydroxide-treated bamboo tar;

[0049] S2. Add 10 g of bamboo tar treated with sodium hydroxide to 11 g of hydrochloric acid solution with a mass fraction of 3.2%, stir at 50 °C for 2 h, then perform centrifugal separation and filtration to obtain pretreated bamboo tar;

[0050] S3. Add 0.4 g of silane coupling agent 3 - isocyanatopropyltriethoxysilane to 20 g of ethanol - water solution (mass ratio of ethanol to water is 10:1), stir well to obtain a hydrolyzed solution of the silane coupling agent; add 40 g of pretreated bamboo tar to the hydrolyzed solution of the silane coupling agent, carry out stirring reaction at 60 °C in a water bath for 1 h, after the reaction, perform centrifugal separation, filtration, and vacuum drying to obtain refined bamboo tar.

[0051] Preparation Example 2 Preparation of Nano - Montmorillonite Core - Loaded Catalyst

[0052] Preparation Example 2.1

[0053] S1. Drop 10.2 g of tetrabutyl titanate into 8 g of ethanol, stir at room temperature for 30 min to obtain a tetrabutyl titanate - ethanol solution; disperse 1 g of sodium - based nano - montmorillonite in 16 g of ethanol, stir at room temperature for 1 h, then slowly drop it into the tetrabutyl titanate - ethanol solution, stir for 6 h to obtain a mixed solution; drop the mixed solution drop - by - drop into 100 g of deionized water, stir for 10 min, then age at room temperature for 24 h, and obtain titanium dioxide - pillared nano - montmorillonite after centrifugation, washing, and drying;

[0054] S2. Add 1 g of dibutyltin dilaurate to 1 g of titanium dioxide - pillared nano - montmorillonite, and then place it in a desiccator for 24 h to obtain the nano - montmorillonite core - loaded catalyst.

[0055] Preparation Example 2.2

[0056] S1. Drop 12.75 g of tetrabutyl titanate into 11 g of ethanol, stir at room temperature for 40 min to obtain a tetrabutyl titanate - ethanol solution; disperse 1.5 g of sodium - based nano - montmorillonite in 21 g of ethanol, stir at room temperature for 1.5 h, then slowly drop it into the tetrabutyl titanate - ethanol solution, stir for 7 h to obtain a mixed solution; drop the mixed solution drop - by - drop into 125 g of deionized water, stir for 15 min, then age at room temperature for 27 h, and obtain titanium dioxide - pillared nano - montmorillonite after centrifugation, washing, and drying;

[0057] S2. Add 1 g of dibutyltin dilaurate to 1 g of titanium dioxide - pillared nano - montmorillonite, and then place it in a desiccator for 24 h to obtain the nano - montmorillonite core - loaded catalyst.

[0058] Preparation Example 2.3

[0059] S1. Drop 15.3 g of tetrabutyl titanate into 14 g of ethanol, and stir at room temperature for 50 min to obtain a tetrabutyl titanate-ethanol solution; Disperse 2 g of sodium-based nanometer montmorillonite in 26 g of ethanol, stir at room temperature for 2 h, then slowly drop it into the tetrabutyl titanate-ethanol solution, and stir for 8 h to obtain a mixed solution; Drop the mixed solution into 150 g of deionized water drop by drop, stir for 20 min, then age at room temperature for 30 h, and obtain titanium dioxide pillared nanometer montmorillonite after centrifugation, washing and drying;

[0060] S2. Add 1 g of dibutyltin dilaurate to 1.2 g of titanium dioxide pillared nanometer montmorillonite, and then place it in a dryer for 32 h to obtain a nanometer montmorillonite core-loaded catalyst.

[0061] Example 1

[0062] S1. First, add 100 g of polycarbonate diol to the reaction kettle, and then stay in the reaction kettle at a temperature of 110 °C and a vacuum degree of 0.06 MPa for 2 h;

[0063] S2. After cooling to room temperature, add 15 g of p-phenylene diisocyanate PPDI to the reaction kettle, stir under nitrogen protection at room temperature to mix evenly, and then gradually heat up to 80 °C and react for 1.5 h;

[0064] S3. After the above reaction is completed, add 10 g of hydroquinone dihydroxyethyl ether, 10 g of trimethylolpropane, 2 g of refined bamboo tar prepared in Preparation Example 1.1, 2.5 g of nanometer montmorillonite core-loaded catalyst prepared in Preparation Example 2.1, and 0.5 g of compound antioxidant to the reaction kettle, stir to mix evenly, and then pour it into a mold for curing. The first-stage curing temperature is 20 °C and the curing time is 48 h; The second-stage curing temperature is 75 °C and the curing time is 8 h; A multi-purpose polyurethane material is obtained; The compound antioxidant used in this example is antioxidant XH-245, triphenyl phosphite, and light stabilizer 770, and the mass ratio is 0.2:0.1:0.1.

[0065] Example 2

[0066] S1. First, add 100 g of polycarbonate diol to the reaction kettle, and then stay in the reaction kettle at a temperature of 120 °C and a vacuum degree of 0.065 MPa for 2.5 h;

[0067] S2. After cooling to room temperature, add 27.5 g of p-phenylene diisocyanate PPDI to the reaction kettle, stir under nitrogen protection at room temperature to mix evenly, and then gradually heat up to 85 °C and react for 1.75 h;

[0068] S3. After the above reaction is completed, add 25 g of hydroquinone dihydroxyethyl ether, 12.5 g of trimethylolpropane, 2 g of the refined bamboo tar prepared in Preparation Example 1.1, 2.5 g of the nano-montmorillonite core-loaded catalyst prepared in Preparation Example 2.1, and 1.1 g of the compound antioxidant into the reaction kettle, stir to mix evenly, and then pour it into a mold for curing. The curing temperature in the first stage is 27.5 °C and the curing time is 36 h; the curing temperature in the second stage is 80 °C and the curing time is 6 h; a multi-purpose polyurethane material is obtained. The compound antioxidant used in this example is antioxidant XH-245, triphenyl phosphite, and light stabilizer 770, and the mass ratio is 0.6:0.25:0.25.

[0069] Example 3

[0070] S1. First, add 100 g of polycarbonate diol into the reaction kettle, and then keep it in the reaction kettle at a temperature of 130 °C and a vacuum degree of 0.07 MPa for 3 h;

[0071] S2. After cooling to room temperature, add 40 g of p-phenylene diisocyanate PPDI into the reaction kettle, stir and mix evenly under nitrogen protection at room temperature, and then gradually heat up to 90 °C and react for 2 h;

[0072] S3. After the above reaction is completed, add 40 g of hydroquinone dihydroxyethyl ether, 15 g of trimethylolpropane, 2 g of the refined bamboo tar prepared in Preparation Example 1.1, 2.5 g of the nano-montmorillonite core-loaded catalyst prepared in Preparation Example 2.1, and 1.8 g of the compound antioxidant into the reaction kettle, stir to mix evenly, and then pour it into a mold for curing. The curing temperature in the first stage is 35 °C and the curing time is 24 h; the curing temperature in the second stage is 80 °C and the curing time is 4 h; a multi-purpose polyurethane material is obtained. The compound antioxidant used in this example is antioxidant XH-245, triphenyl phosphite, and light stabilizer 770, and the mass ratio is 1:0.4:0.4.

[0073] Example 4

[0074] The difference between Example 4 and Example 1 is that the refined bamboo tar used in Example 4 is from Preparation Example 1.1 and the mass is 8 g.

[0075] Example 5

[0076] The difference between Example 5 and Example 1 is that the refined bamboo tar used in Example 5 is from Preparation Example 1.1 and the mass is 14 g.

[0077] Example 6

[0078] The difference between Example 6 and Example 1 is that the refined bamboo tar used in Example 6 is from Preparation Example 1.2 and the mass is 2 g.

[0079] Example 7

[0080] The difference between Example 7 and Example 1 is that the refined bamboo tar used in Example 7 is from Preparation Example 1.3 and has a mass of 2 g.

[0081] Example 8

[0082] The difference between Example 8 and Example 1 is that the nano-montmorillonite core-loaded catalyst used in Example 8 is from Preparation Example 2.1 and has a mass of 3 g.

[0083] Example 9

[0084] The difference between Example 9 and Example 1 is that the nano-montmorillonite core-loaded catalyst used in Example 9 is from Preparation Example 2.1 and has a mass of 3.5 g.

[0085] Example 10

[0086] The difference between Example 10 and Example 1 is that the nano-montmorillonite core-loaded catalyst used in Example 10 is from Preparation Example 2.2 and has a mass of 2.5 g.

[0087] Example 11

[0088] The difference between Example 11 and Example 1 is that the nano-montmorillonite core-loaded catalyst used in Example 11 is from Preparation Example 2.3 and has a mass of 2.5 g.

[0089] Comparative Example 1

[0090] The difference between Comparative Example 1 and Example 1 is that the refined bamboo tar used in Comparative Example 1 is from Preparation Example 1.1 and has a mass of 0.5 g.

[0091] Comparative Example 2

[0092] The difference between Comparative Example 2 and Example 1 is that the refined bamboo tar used in Comparative Example 2 is from Preparation Example 1.1 and has a mass of 18 g.

[0093] Comparative Example 3

[0094] The difference between Comparative Example 3 and Example 1 is that no refined bamboo tar is added in Comparative Example 3.

[0095] Comparative Example 4

[0096] The difference between Comparative Example 4 and Example 1 is that the nano-montmorillonite core-loaded catalyst used in Comparative Example 4 is from Preparation Example 2.1 and has a mass of 1.5 g.

[0097] Comparative Example 5

[0098] The difference between Comparative Example 5 and Example 1 is that the nano-montmorillonite core-loaded catalyst used in Comparative Example 5 is from Preparation Example 2.1 and has a mass of 4.5 g.

[0099] Comparative Example 6

[0100] The difference between Comparative Example 6 and Example 1 is that no nano-montmorillonite core-loaded catalyst is added in Comparative Example 6.

[0101] Performance detection test

[0102] I. Referring to GB / T 1040.1-2018 Plastics - Determination of tensile properties - Part 1: General principles, the tensile strength and elongation at break of the polyurethane materials obtained in Examples 1-11 and Comparative Examples 1-6 were detected, and the results are shown in Table 1.

[0103] II. The polyurethane materials obtained in Examples 1-11 and Comparative Examples 1-6 were treated at 100 °C for 72 h, and then their tensile strength was tested according to the above method, and the retention rate of the tensile strength was calculated. The results are shown in Table 1.

[0104] Retention rate of tensile strength = (tensile strength after heat treatment / original tensile strength) × 100%.

[0105] The specific detection results are as follows:

[0106] Table 1 Performance detection results

[0107] It can be seen from the detection results in Table 1 that the tensile strength of a polyurethane material provided by the present application can reach 49 MPa, the elongation at break reaches 715%, and after being treated at 100 °C for 72 h, the retention rate of the tensile strength can reach 90.5%. This shows that the polyurethane material provided by the present application has good mechanical properties and excellent aging resistance.

[0108] This specific embodiment is only an interpretation of the present application and does not limit the present application. Those skilled in the art can make modifications without creative contributions to this embodiment after reading this specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A multi-purpose polyurethane material, characterized in that: The raw materials include 100 parts of polycarbonate diol, 15-40 parts of p-phenylene diisocyanate, 10-40 parts of hydroquinone dihydroxyethyl ether, 10-15 parts of trimethylolpropane, 2-14 parts of refined bamboo tar, 0.5-1.8 parts of composite antioxidant and 2.5-3.5 parts of nano-montmorillonite core-supported catalyst by weight.

2. A multi-purpose polyurethane material according to claim 1, characterized in that: The preparation method of the refined bamboo tar comprises the following steps: S1. The bamboo tar stock solution was added to a sodium hydroxide solution, stirred at 40-50 ° C for 20-28h, centrifuged and filtered to obtain sodium hydroxide-treated bamboo tar; S2. The bamboo tar treated with sodium hydroxide was added to a hydrochloric acid solution, stirred at 30-50 ° C for 1-3h, and then centrifuged and filtered to obtain pretreated bamboo tar; S3. Add the silane coupling agent to the ethanol aqueous solution, stir and mix thoroughly to obtain the silane coupling agent hydrolyzate; add the pretreated bamboo tar to the silane coupling agent hydrolyzate, stir and react in a water bath at 60-80°C for 1-2h, and after the reaction is completed, centrifuge, filter, and vacuum dry to obtain refined bamboo tar.

3. A multi-purpose polyurethane material according to claim 2, characterized in that: The mass fraction of the sodium hydroxide solution is 11-18%; the mass fraction of the hydrochloric acid solution is 1.6-3.2%.

4. A multi-purpose polyurethane material according to claim 2, characterized in that: The silane coupling agent is one of KH-550, KH-560, KH-570 or 3-isocyanatepropyltriethoxysilane.

5. The multi-purpose polyurethane material according to claim 1, characterized in that: The composite antioxidant comprises antioxidant XH-245, triphenyl phosphite and light stabilizer 770; the mass ratio of the antioxidant XH-245, triphenyl phosphite and light stabilizer 770 is 0.2-1:0.1-0.4:0.1-0.

4.

6. The multi-purpose polyurethane material according to claim 1, characterized in that: The nano-montmorillonite core-supported catalyst raw materials include dibutyltin dilaurate and titanium dioxide pillared nano-montmorillonite, and the mass ratio of the two is 1:1-1.

2.

7. A multi-purpose polyurethane material according to claim 6, characterized in that: The titanium dioxide pillared nano-montmorillonite is prepared from the following raw materials in parts by weight: 1-2 parts of sodium-based nano-montmorillonite, 24-40 parts of ethanol, 10.2-15.3 parts of tetrabutyl titanate, and 100-150 parts of deionized water.

8. The multi-purpose polyurethane material according to claim 6, characterized in that: The method for preparing the nano-montmorillonite core-supported catalyst comprises the following steps: Adding dibutyltin dilaurate to the titanium dioxide pillared nano-montmorillonite, and then placing it in a dryer for 24-32 hours to obtain the nano-montmorillonite core-supported catalyst; The preparation method of the titanium dioxide pillared nano-montmorillonite comprises the following steps: 10.2-15.3 parts of tetrabutyl titanate are dripped into 8-14 parts of ethanol, and stirred at room temperature for 30-50 minutes to obtain a tetrabutyl titanate-ethanol solution; 1-2 parts of sodium-based nano-montmorillonite are dispersed in 16-26 parts of ethanol, stirred at room temperature for 1-2 hours, and then slowly dripped into the tetrabutyl titanate-ethanol solution, and stirred for 6-8 hours to obtain a mixed solution; the mixed solution is dripped drop by drop into 100-150 parts of deionized water, stirred for 10-20 minutes, aged at room temperature for 24-30 hours, and titanium dioxide pillared nano-montmorillonite is obtained after centrifugation, washing, and drying.

9. A method for synthesizing a multi-purpose polyurethane material according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. First, polycarbonate diol is added to the reactor, and then the reactor is kept at a temperature of 110-130°C and a vacuum degree of 0.06-0.07MPa for 2-3h; S2. After cooling to room temperature, p-phenylene diisocyanate was added to the reaction kettle, stirred under nitrogen protection at room temperature to mix evenly, and then gradually heated to 80-90 ° C for 1.5-2h; S3. After the above reaction is completed, dihydroxyethyl hydroquinone, trimethylolpropane, refined bamboo tar, nano-montmorillonite core-supported catalyst, and composite antioxidant are added to the reactor, stirred to mix evenly, and then poured into a mold for curing to obtain a multi-purpose polyurethane material.

10. The method for synthesizing a multi-purpose polyurethane material according to claim 9, characterized in that: The curing includes a first stage and a second stage; the curing temperature of the first stage is 20-35° C., and the curing time is 24-48 hours; the curing temperature of the second stage is 75-85° C., and the curing time is 4-8 hours.

Images