CN113501933A - High-strength polyurethane material for roller production and preparation method thereof - Google Patents
High-strength polyurethane material for roller production and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7678—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing condensed aromatic rings
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
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- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention relates to a high-strength polyurethane material for roller production and a preparation method thereof, which comprises the steps of adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate to generate an intermediate 1; mixing ethylene carbonate and hexamethylenediamine for reaction for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, and drying in vacuum for 12 hours to obtain an intermediate 2; adding polytetrahydrofuran diol into a reaction kettle, adding the intermediate 1, adding dibutyltin laurate and an auxiliary agent, reacting for 2 hours, adding the intermediate 2, adding a filler, stirring for 15min to prepare a mixture, and curing the mixture to prepare a high-strength polyurethane material; the intermediate 2 is used as a chain extender, the intermediate 2 is a hydroxyl-terminated polyurethane, and the molecule contains two urethane groups, so that the high-degree symmetry is realized, the regularity of the hard segment of the polyurethane is further improved, and the mechanical and heat-resistant properties of the polyurethane are improved.
Description
Technical Field
The invention belongs to the technical field of polyurethane materials, and particularly relates to a high-strength polyurethane material for roller production and a preparation method thereof.
Background
Polyurethane (PU), the full name of which is polyurethane, is a high molecular compound. Polyurethanes fall into the two main categories of polyester and polyether. They can be made into polyurethane plastics (mainly foamed plastics), polyurethane fibre, polyurethane rubber and elastomer.
The soft polyurethane mainly has a thermoplastic linear structure, and has better stability, chemical resistance, rebound resilience and mechanical property and smaller compression deformability than PVC foaming materials. Good heat insulation, sound insulation, shock resistance and gas defense performance. Therefore, the product is used as a packaging, sound insulation and filtering material. The hard polyurethane plastic has the advantages of light weight, excellent sound insulation and heat insulation performance, chemical resistance, good electrical property, easy processing and low water absorption rate. It is mainly used as a heat-insulating structural material in the building, automobile and aviation industries.
The polyurethane material has excellent wear resistance, and the polyurethane material is used as a material for producing rollers in the current market, but is limited by the polyurethane, so that the rollers have poor heat resistance when rotating at high speed or being used in a high-temperature environment, the application range of the rollers produced by the polyurethane material is limited, and the use requirements of more fields cannot be met.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-strength polyurethane material for roller production and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of a high-strength polyurethane material for roller production comprises the following steps:
step S1, adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate, stirring at a constant speed, heating to 90 ℃, reacting for 5 hours to generate an intermediate 1 bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine with the molar ratio of 3: 2.5-3, wherein the dosage of the dimethyl carbonate is 10 times of the sum of the weights of the bis (trichloromethyl) carbonate and the 1, 5-naphthalene diamine;
in step S1, bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine react in dimethyl carbonate as a solvent to generate intermediate 1, and the reaction process is as follows:
step S2, mixing ethylene carbonate and hexamethylene diamine, heating to 60 ℃, uniformly stirring until no bubbles are generated, heating to 90 ℃, uniformly stirring and reacting for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, taking out, cooling to be a solid state, crushing, grinding, and vacuum drying for 12 hours at 75 ℃ to obtain an intermediate 2, wherein the molar ratio of the ethylene carbonate to the hexamethylene diamine is controlled to be 2: 1;
in step S2, the vinyl carbonate and hexamethylenediamine react to form intermediate 2, and the reaction process is as follows:
step S3, adding polytetrahydrofuran diol into a reaction kettle, dehydrating for 2h in vacuum, adding ground intermediate 1, heating and stirring at a constant speed until the intermediate 1 is melted, cooling to 100 ℃, introducing nitrogen, adding dibutyltin laurate and an auxiliary agent, stirring at a constant speed and reacting for 2h, then adding intermediate 2, stirring at a high speed for 10min, adding a filler, stirring at a high speed for 15min to obtain a mixture, curing the mixture to obtain a high-strength polyurethane material, controlling the molar ratio of polytetrahydrofuran diol, intermediate 1 and intermediate 2 to be 1: 1.5: 0.5, and controlling the amount of dibutyltin laurate to be polytetrahydrofuran diol, 0.5-1% of the weight sum of the intermediate 1 and the intermediate 2, 10-15% of the weight sum of the polytetrahydrofuran diol, the intermediate 1 and the intermediate 2, and 10-12.5% of the weight sum of the auxiliary agent.
In the step S3, polytetrahydrofuran diol and the intermediate 1 are synthesized into a small molecule prepolymer a, then the intermediate 2 is added as a chain extender, the intermediate 2 reacts with the free intermediate 1, and after the free intermediate 1 completely reacts, the intermediate 2 reacts with an isocyanate group in the small molecule prepolymer a to prepare polyurethane, wherein the reaction process is as follows:
the polytetrahydrofuran diol in the polyurethane prepared in the step S3 is used as a soft segment, the intermediate 2 and the intermediate 1 are used as hard segments, the hard segments have high symmetry in structure, and the polyurethane material synthesized by the traditional process has excellent wear resistance when being used for producing rollers, but is limited by the polyurethane itself, when the roller is rotated at high speed or used in a high temperature environment, in the step S3, polytetrahydrofuran diol and an intermediate 1 are synthesized into a small molecular prepolymer a, then an intermediate 2 is added as a chain extender, the intermediate 2 is terminated by hydroxyl groups and contains two carbamate groups in molecules, and has high symmetry, so that the regularity of hard sections of the synthesized polyurethane is further improved, and the mechanical and heat-resistant properties of the polyurethane are improved.
Further: the conditions for vacuum dehydration in step S3 are: the temperature is 120 ℃, and the vacuum degree is-0.10 MPa.
Further: the specific steps of the aging in step S3 are: and (3) adding the mixture into a vulcanizing machine, preheating for 15min at 140 ℃, and then cold-pressing for 5min to prepare the high-strength polyurethane material.
The preparation method of the high-strength polyurethane material for roller production is characterized in that the auxiliary agent is formed by mixing a plasticizer, an antioxidant and an anti-aging agent according to the weight ratio of 1: 0.5: 0.3.
A high-strength polyurethane material for roller production is prepared by the preparation method.
The invention has the beneficial effects that:
the high-strength polyurethane material of the invention takes polytetrahydrofuran diol as a soft segment, takes an intermediate 2 and an intermediate 1 as hard segments, and the hard segment has high symmetry in structure, the polyurethane material synthesized by the traditional process has excellent wear resistance when being used for producing rollers, but is limited by polyurethane, the rollers have poor heat resistance when rotating at high speed or being used in a high-temperature environment, the application range of the rollers produced by the polyurethane material is limited, and the use requirements of more fields cannot be met, the polytetrahydrofuran diol and the intermediate 1 are synthesized into a small molecule prepolymer a in the step S3 of the invention, then the intermediate 2 is added as a chain extender, the intermediate 2 is hydroxyl-terminated and contains two carbamate groups in the molecule, and also has high symmetry, and the regularity of the hard segment of the synthesized polyurethane is further improved, the mechanical and heat-resistant properties of the polyurethane are improved, so that the roller can still be used in a high-speed rotation or high-temperature environment, and the rigid particles are added as fillers, so that the strength of the polyurethane material can be improved, and the durability of the polyurethane material used as the roller material is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a high-strength polyurethane material for roller production comprises the following steps:
step S1, adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate, stirring at a constant speed, heating to 90 ℃, reacting for 5 hours to generate an intermediate 1 bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine with a molar ratio of 3: 2.5, wherein the dosage of the dimethyl carbonate is 10 times of the sum of the weights of the bis (trichloromethyl) carbonate and the 1, 5-naphthalene diamine;
step S2, mixing ethylene carbonate and hexamethylene diamine, heating to 60 ℃, uniformly stirring until no bubbles are generated, heating to 90 ℃, uniformly stirring and reacting for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, taking out, cooling to be a solid state, crushing, grinding, and vacuum drying for 12 hours at 75 ℃ to obtain an intermediate 2, wherein the molar ratio of the ethylene carbonate to the hexamethylene diamine is controlled to be 2: 1;
step S3, adding polytetrahydrofuran diol into a reaction kettle, dehydrating for 2h in vacuum at 120 ℃ and under the vacuum degree of-0.10 MPa, adding the ground intermediate 1, heating and stirring at constant speed until the intermediate 1 is melted, cooling to 100 ℃, introducing nitrogen, adding dibutyltin laurate and an auxiliary agent, stirring at constant speed and reacting for 2h, then adding the intermediate 2, stirring at high speed for 10min, adding nano calcium carbonate, stirring at high speed for 15min, preparing a mixture, adding the mixture into a vulcanizing machine, preheating for 15min at 140 ℃, cold-pressing for 5min, preparing a high-strength polyurethane material, and preparing the high-strength polyurethane material, wherein the molar ratio of polytetrahydrofuran diol to the intermediate 1 to the intermediate 2 is controlled to be 1: 1.5: 0.5, the amount of dibutyltin laurate is 0.5 wt% of the polytetrahydrofuran diol to the intermediate 1 and the intermediate 2, and the amount of nano calcium carbonate is controlled to be polytetrahydrofuran diol to be 0.5%, The weight of the intermediate 1 and the intermediate 2 is 10 percent, and the dosage of the auxiliary agent is 10 percent of the mass of the filler.
The auxiliary agent is prepared by mixing diisooctyl sebacate, an antioxidant 1010 and an anti-aging agent H according to the weight ratio of 1: 0.5: 0.3.
Example 2
A preparation method of a high-strength polyurethane material for roller production comprises the following steps:
step S1, adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate, stirring at a constant speed, heating to 90 ℃, reacting for 5 hours to generate an intermediate 1 bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine with a molar ratio of 3: 2.6, wherein the dosage of the dimethyl carbonate is 10 times of the sum of the weights of the bis (trichloromethyl) carbonate and the 1, 5-naphthalene diamine;
step S2, mixing ethylene carbonate and hexamethylene diamine, heating to 60 ℃, uniformly stirring until no bubbles are generated, heating to 90 ℃, uniformly stirring and reacting for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, taking out, cooling to be a solid state, crushing, grinding, and vacuum drying for 12 hours at 75 ℃ to obtain an intermediate 2, wherein the molar ratio of the ethylene carbonate to the hexamethylene diamine is controlled to be 2: 1;
step S3, adding polytetrahydrofuran diol into a reaction kettle, dehydrating for 2h in vacuum at 120 ℃ and under the vacuum degree of-0.10 MPa, adding the ground intermediate 1, heating and stirring at constant speed until the intermediate 1 is melted, cooling to 100 ℃, introducing nitrogen, adding dibutyltin laurate and an auxiliary agent, stirring at constant speed and reacting for 2h, then adding the intermediate 2, stirring at high speed for 10min, adding nano calcium carbonate, stirring at high speed for 15min, preparing a mixture, adding the mixture into a vulcanizing machine, preheating for 15min at 140 ℃, cold-pressing for 5min, preparing a high-strength polyurethane material, and preparing the high-strength polyurethane material, wherein the molar ratio of polytetrahydrofuran diol to the intermediate 1 to the intermediate 2 is controlled to be 1: 1.5: 0.5, the amount of dibutyltin laurate is 0.6% of the sum of the weight of the polytetrahydrofuran diol to the intermediate 1 and the intermediate 2, and the amount of the nano calcium carbonate is controlled to be polytetrahydrofuran diol to be 0.6% of the sum of the weight of the intermediate 1 to the intermediate 1 and the intermediate 2, The weight of the intermediate 1 and the intermediate 2 is 12 percent, and the dosage of the auxiliary agent is 10.5 percent of the mass of the filler.
The auxiliary agent is prepared by mixing diisooctyl sebacate, an antioxidant 1010 and an anti-aging agent H according to the weight ratio of 1: 0.5: 0.3.
Example 3
A preparation method of a high-strength polyurethane material for roller production comprises the following steps:
step S1, adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate, stirring at a constant speed, heating to 90 ℃, reacting for 5 hours to generate an intermediate 1 bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine with a molar ratio of 3: 2.8, wherein the dosage of the dimethyl carbonate is 10 times of the sum of the weights of the bis (trichloromethyl) carbonate and the 1, 5-naphthalene diamine;
step S2, mixing ethylene carbonate and hexamethylene diamine, heating to 60 ℃, uniformly stirring until no bubbles are generated, heating to 90 ℃, uniformly stirring and reacting for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, taking out, cooling to be a solid state, crushing, grinding, and vacuum drying for 12 hours at 75 ℃ to obtain an intermediate 2, wherein the molar ratio of the ethylene carbonate to the hexamethylene diamine is controlled to be 2: 1;
step S3, adding polytetrahydrofuran diol into a reaction kettle, dehydrating for 2h in vacuum at 120 ℃ and under the vacuum degree of-0.10 MPa, adding the ground intermediate 1, heating and stirring at constant speed until the intermediate 1 is melted, cooling to 100 ℃, introducing nitrogen, adding dibutyltin laurate and an auxiliary agent, stirring at constant speed and reacting for 2h, then adding the intermediate 2, stirring at high speed for 10min, adding nano calcium carbonate, stirring at high speed for 15min, preparing a mixture, adding the mixture into a vulcanizing machine, preheating for 15min at 140 ℃, cold-pressing for 5min, preparing a high-strength polyurethane material, and preparing the high-strength polyurethane material, wherein the molar ratio of polytetrahydrofuran diol to the intermediate 1 to the intermediate 2 is controlled to be 1: 1.5: 0.5, the amount of dibutyltin laurate is 0.8% of the sum of the weight of the polytetrahydrofuran diol to the intermediate 1 and the intermediate 2, and the amount of the nano calcium carbonate is controlled to be polytetrahydrofuran diol to be 0.10%, The weight of the intermediate 1 and the intermediate 2 is 14, and the amount of the auxiliary agent is 12% of the mass of the filler.
The auxiliary agent is prepared by mixing diisooctyl sebacate, an antioxidant 1010 and an anti-aging agent H according to the weight ratio of 1: 0.5: 0.3.
Example 4
A preparation method of a high-strength polyurethane material for roller production comprises the following steps:
step S1, adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate, stirring at a constant speed, heating to 90 ℃, reacting for 5 hours to generate an intermediate 1 bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine with the molar ratio of 3: 3, wherein the dosage of the dimethyl carbonate is 10 times of the sum of the weights of the bis (trichloromethyl) carbonate and the 1, 5-naphthalene diamine;
step S2, mixing ethylene carbonate and hexamethylene diamine, heating to 60 ℃, uniformly stirring until no bubbles are generated, heating to 90 ℃, uniformly stirring and reacting for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, taking out, cooling to be a solid state, crushing, grinding, and vacuum drying for 12 hours at 75 ℃ to obtain an intermediate 2, wherein the molar ratio of the ethylene carbonate to the hexamethylene diamine is controlled to be 2: 1;
step S3, adding polytetrahydrofuran diol into a reaction kettle, dehydrating for 2h in vacuum at 120 ℃ and under the vacuum degree of-0.10 MPa, adding the ground intermediate 1, heating and stirring at constant speed until the intermediate 1 is melted, cooling to 100 ℃, introducing nitrogen, adding dibutyltin laurate and an auxiliary agent, stirring at constant speed and reacting for 2h, then adding the intermediate 2, stirring at high speed for 10min, adding nano calcium carbonate, stirring at high speed for 15min, preparing a mixture, adding the mixture into a vulcanizing machine, preheating for 15min at 140 ℃, cold-pressing for 5min, preparing a high-strength polyurethane material, and preparing the high-strength polyurethane material, wherein the molar ratio of the polytetrahydrofuran diol to the intermediate 1.5: 0.5, the dosage of the dibutyltin laurate is 1 of the sum of the weight of the polytetrahydrofuran diol to the intermediate 1 and the intermediate 2, and the dosage of the nano calcium carbonate is 1 of the polytetrahydrofuran diol, 15% of the weight of the intermediate 1 and the intermediate 2, and the dosage of the auxiliary agent is 12.5% of the mass of the filler.
The auxiliary agent is prepared by mixing diisooctyl sebacate, an antioxidant 1010 and an anti-aging agent H according to the weight ratio of 1: 0.5: 0.3.
Comparative example 1
Compared with example 1, the comparative example does not add nano calcium carbonate.
Comparative example 2
The comparative example is a polyurethane material produced in one step in the market.
The properties of the polyurethane materials prepared in examples 1 to 4 and comparative examples 1 to 2 were measured, and the results are shown in the following table:
tensile strength, elongation at break/GB/T528;
as can be seen from the above table, the tensile strength of examples 1 to 4 is 17.5 to 17.8MPa, the elongation at break is 76 to 78%, the aging coefficient is 0.93 to 0.96, and the compressive strength is 2.6 to 2.8 MPa; comparative examples 1 to 2 had tensile strengths of 15.8 to 17.1MPa, elongations at break of 53 to 71%, aging coefficients of 0.71 to 0.91, and compressive strengths of 2.1 to 2.5 MPa; therefore, the polyurethane material prepared by the invention has good strength and toughness, and also has excellent heat resistance, and the durability of the roller is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. A preparation method of a high-strength polyurethane material for roller production is characterized by comprising the following steps: the method comprises the following steps:
step S1, adding bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine into a three-neck flask filled with dimethyl carbonate, stirring at a constant speed, heating to 90 ℃, and reacting for 5 hours to generate an intermediate 1;
step S2, mixing ethylene carbonate and hexamethylenediamine, heating to 60 ℃, uniformly stirring until no bubbles are generated, heating to 90 ℃, uniformly stirring and reacting for 3 hours, vacuumizing until no bubbles are generated after the reaction is finished, taking out, cooling to be a solid state, crushing, grinding, and vacuum-drying for 12 hours at 75 ℃ to obtain an intermediate 2;
step S3, adding polytetrahydrofuran diol into a reaction kettle, dehydrating for 2h in vacuum, adding the ground intermediate 1, heating and stirring at a constant speed until the intermediate 1 is melted, cooling to 100 ℃, introducing nitrogen, adding dibutyltin laurate and an auxiliary agent, stirring at a constant speed and reacting for 2h, then adding the intermediate 2, stirring at a high speed for 10min, adding a filler, continuing stirring at a high speed for 15min to obtain a mixture, and curing the mixture to obtain the high-strength polyurethane material.
2. The method for preparing the high-strength polyurethane material for roller production according to claim 1, wherein the method comprises the following steps: the conditions for vacuum dehydration in step S3 are: the temperature is 120 ℃, and the vacuum degree is-0.10 MPa.
3. The method for preparing the high-strength polyurethane material for roller production according to claim 1, wherein the method comprises the following steps: the specific steps of the aging in step S3 are: and (3) adding the mixture into a vulcanizing machine, preheating for 15min at 140 ℃, and then cold-pressing for 5min to prepare the high-strength polyurethane material.
4. The method for preparing the high-strength polyurethane material for roller production according to claim 1, wherein the method comprises the following steps: in step S1, the molar ratio of bis (trichloromethyl) carbonate to 1, 5-naphthalene diamine is 3: 2.5-3, and the amount of dimethyl carbonate is 10 times of the sum of the weight of bis (trichloromethyl) carbonate and 1, 5-naphthalene diamine.
5. The method for preparing the high-strength polyurethane material for roller production according to claim 1, wherein the method comprises the following steps: in step S2, the molar ratio of ethylene carbonate to hexamethylene diamine is controlled to 2: 1.
6. The method for preparing the high-strength polyurethane material for roller production according to claim 1, wherein the method comprises the following steps: in the step S3, the molar ratio of the polytetrahydrofuran diol to the intermediate 1 to the intermediate 2 is controlled to be 1: 1.5: 0.5, the using amount of the dibutyltin laurate is 0.5-1% of the weight sum of the polytetrahydrofuran diol to the intermediate 1 and the intermediate 2, the using amount of the filler is 10-15% of the weight sum of the polytetrahydrofuran diol to the intermediate 1 and the intermediate 2, and the using amount of the auxiliary agent is 10-12.5% of the weight of the filler.
7. The method for preparing the high-strength polyurethane material for roller production according to claim 1, wherein the method comprises the following steps: the auxiliary agent is formed by mixing a plasticizer, an antioxidant and an anti-aging agent according to the weight ratio of 1: 0.5: 0.3.
8. A high-strength polyurethane material for roller production, which is prepared by the preparation method of claim 1.
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