CN118240177A - Production process of flame-retardant wear-resistant polyurethane composite material - Google Patents
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
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- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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Abstract
The invention relates to a production process of a flame-retardant wear-resistant polyurethane composite material, which comprises the following steps of taking polytetrahydrofuran ether glycol and isophorone diisocyanate as main reactants, taking an organotin catalyst as a catalyst, taking a disulfide chain extender as a chain extender, taking modified calcium metaborate as an additive modifier, and detecting the modified calcium metaborate later to enhance the mechanical property of the polyurethane material and greatly enhance the performances of flame retardance and wear resistance.
Description
Technical Field
The invention relates to the field of composite materials, in particular to a production process of a flame-retardant wear-resistant polyurethane composite material.
Background
For a long time, rubber is always the preferred material in the tire manufacturing industry, and the flexibility of rubber tire is good, can alleviate road vibrations and noise, makes the vehicle internal environment more comfortable, therefore passenger's experience is better, however in long-term use, also unavoidable exposing rubber tire has life weak point, wearability and tear strength subalternation shortcoming. The molecular structure of the polyurethane elastomer enables the polyurethane elastomer to be a high molecular synthetic material with the performance between that of common rubber and plastics, and the polyurethane elastomer has the advantages of high elasticity of rubber, high hardness and high strength of plastics, wear resistance stronger than that of rubber, good mechanical property strength, oil resistance, chemical resistance, flexibility resistance and excellent low temperature resistance. Based on these basic properties, the use in polyurethane elastomer tires has become widespread.
Although the wear resistance of polyurethane elastomer is higher than that of rubber, the high temperature resistance and flame retardance of polyurethane are poor, and in addition, the wear resistance of polyurethane still cannot meet the current requirements, so that the development space of polyurethane materials is limited. Thus, there is a need in the market today for a polyurethane material that is both flame retardant and abrasion resistant for use in automobile tires.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide a production process of a flame-retardant wear-resistant polyurethane composite material.
The aim of the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a process for producing a flame-retardant wear-resistant polyurethane composite material, which comprises the following steps:
(1) Preparation of calcium metaborate:
Weighing calcium hydroxide and boric acid, mixing into deionized water, stirring for reaction at room temperature, vacuum filtering to collect solid, washing with water until the pH value of the washing solution is 7, drying in an oven, and crushing to obtain calcium metaborate;
(2) Epoxidized calcium metaborate:
dispersing an epoxy silane coupling agent in deionized water, fully stirring, adding calcium metaborate, heating, stirring, vacuum filtering, collecting solid after the reaction is finished, washing with water for three times, and vacuum drying to obtain epoxidized calcium metaborate;
(3) Modified calcium metaborate:
mixing the epoxidized calcium metaborate and tetrahydrofuran, fully stirring until the mixture is uniform, adding 4,4' -diaminodiphenyl ether, heating to boiling, condensing, refluxing, stirring and reacting for 5-6 hours, after the reaction is finished, vacuum filtering and collecting solids, washing the solids with acetone for three times, and vacuum drying to obtain modified calcium metaborate;
(4) Preparing polyurethane prepolymer:
Weighing polytetrahydrofuran ether glycol, dehydrating, placing in a reaction container, introducing nitrogen to replace air, heating to 70-80 ℃, adding isophorone diisocyanate, uniformly mixing, adding an organotin catalyst, and reacting for 2-4 hours under heat preservation and stirring to obtain polyurethane prepolymer;
(5) Preparing a polyurethane composite material:
Mixing the polyurethane prepolymer with an organic solvent, fully stirring, adding modified calcium metaborate and a chain extender, continuously preserving heat and stirring for 2-4h, cooling to room temperature, and drying under reduced pressure after the reaction is finished to obtain the polyurethane composite material.
Preferably, in the step (1), the mass volume ratio of the calcium hydroxide, the boric acid and the deionized water is (1.3-2.1) g (2.5-3.5) g: (20-30) mL.
Preferably, in the step (1), the stirring reaction process is stirring treatment at a speed of 200-300r/min for 3-5h; drying is carried out in an oven at 150-160 ℃ for 2-6h.
Preferably, in the step (2), the epoxy silane coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane, and the mass volume ratio of calcium metaborate, the epoxy silane coupling agent and deionized water is 1g (0.1-0.4 g): (10-20) mL.
Preferably, in the step (2), the temperature-rising stirring treatment is carried out at a speed of 200-300r/min for 4-8h under the condition of 55-65 ℃.
Preferably, in the step (3), the mass volume ratio of the epoxidized calcium metaborate, the 4,4' -diaminodiphenyl ether and the tetrahydrofuran is 1g (0.25-0.43 g): (10-20) mL.
Preferably, in step (4), the molecular weight of the polytetrahydrofuran ether glycol is 1000-2000 and the molar ratio of polytetrahydrofuran ether glycol to isophorone diisocyanate is 1:1.8-2.2.
Preferably, in the step (4), the organotin catalyst is T9 or T12, and the addition amount of the organotin catalyst is 1.5% -3.5% of the mass of polytetrahydrofuran ether glycol.
Preferably, in the step (5), the chain extender is 2-hydroxyethyl disulfide or 4,4' -dithiodiphenylamine, and the molar ratio of the chain extender to polytetrahydrofuran ether glycol is 1:1.1-1.3.
Preferably, in the step (5), the organic solvent is N, N-dimethylformamide or toluene, and the mass volume ratio of the polyurethane prepolymer, the modified calcium metaborate and the organic solvent is 10g (1.6-2.8 g): (100-200) mL.
In a second aspect, the invention provides a flame-retardant wear-resistant polyurethane composite material, which is produced by using the production process.
The beneficial effects of the invention are as follows:
1. the invention prepares a polyurethane composite material, the production process is to take polytetrahydrofuran ether glycol and isophorone diisocyanate as main reactants, the catalyst is an organotin catalyst, the chain extender is a disulfide chain extender, modified calcium metaborate is used as an additive modifier, and the subsequent detection shows that the modified calcium metaborate not only enhances the mechanical properties of the polyurethane material, but also greatly enhances the performances of flame retardance and wear resistance.
2. The preparation process of the modified calcium metaborate comprises the steps of firstly preparing a calcium metaborate base material by using calcium hydroxide and boric acid as raw materials; then mixing the epoxy silane coupling agent with the epoxy silane coupling agent to activate the surface epoxy; then the ether compound 4,4' -diaminodiphenyl ether containing diamino is mixed with the calcium metaborate which is epoxidized, and the amino is combined with epoxy group under proper conditions, so as to finally prepare the sexual calcium metaborate.
3. In the process of preparing the modified calcium metaborate, 4' -diaminodiphenyl ether contains diamino, and the addition amount is excessive, so that the obtained modified calcium metaborate still contains a large amount of amino groups, and the modified calcium metaborate can play a role in chain extension modification after being mixed with polyurethane prepolymer as an additive, and finally the polyurethane composite material with excellent performance is prepared after being matched with the traditional disulfide bond chain extender.
Detailed Description
The technical scheme of the invention is described below through specific examples. It is to be understood that the mention of one or more method steps of the present invention does not exclude the presence of other method steps before and after the combination step or that other method steps may be interposed between these explicitly mentioned steps; it should also be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Moreover, unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying the method steps and is not intended to limit the order of arrangement of the method steps or to limit the scope of the invention in which the invention may be practiced, as such changes or modifications in their relative relationships may be regarded as within the scope of the invention without substantial modification to the technical matter.
In order to better understand the above technical solution, exemplary embodiments of the present invention are described in more detail below. While exemplary embodiments of the invention are shown, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention is further described with reference to the following examples.
Example 1
A production process of a flame-retardant wear-resistant polyurethane composite material comprises the following steps:
(1) Preparation of calcium metaborate:
Weighing calcium hydroxide and boric acid, mixing into deionized water, stirring at a speed of 250r/min for 4 hours at room temperature, vacuum filtering, collecting solid, washing with water until the pH value of the washing solution is 7, drying in a baking oven at 150 ℃ for 4 hours, and crushing to obtain calcium metaborate; the mass volume ratio of the calcium hydroxide, the boric acid and the deionized water is 1.7g to 3g to 25mL.
(2) Epoxidized calcium metaborate:
Dispersing an epoxy silane coupling agent in deionized water, fully stirring, adding calcium metaborate, heating to 60 ℃, preserving heat at a speed of 250r/min, stirring for 6 hours, vacuum-filtering to collect solid after the reaction is finished, washing with water for three times, and vacuum-drying to obtain epoxidized calcium metaborate; the epoxy silane coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane, and the mass volume ratio of calcium metaborate, the epoxy silane coupling agent and deionized water is 1g:0.2g:15mL.
(3) Modified calcium metaborate:
Mixing the calcium metaborate and the tetrahydrofuran, fully stirring to be uniform, adding 4,4' -diaminodiphenyl ether, heating to boiling, condensing, refluxing, stirring and reacting for 5 hours, after the reaction is finished, vacuum filtering and collecting solids, washing for three times by using acetone, and vacuum drying to obtain modified calcium metaborate; the mass volume ratio of the calcium metaborate, the 4,4' -diaminodiphenyl ether and the tetrahydrofuran is 1g:0.34g:15mL.
(4) Preparing polyurethane prepolymer:
Weighing polytetrahydrofuran ether glycol, dehydrating, placing in a reaction container, introducing nitrogen to replace air, heating to 75 ℃, adding isophorone diisocyanate, uniformly mixing, adding an organotin catalyst T9, wherein the addition amount is 2.5% of the mass of polytetrahydrofuran ether glycol, and carrying out heat preservation and stirring reaction for 3 hours to obtain polyurethane prepolymer; the molecular weight of the polytetrahydrofuran ether glycol is 2000, and the molar ratio of polytetrahydrofuran ether glycol to isophorone diisocyanate is 1:2.
(5) Preparing a polyurethane composite material:
Mixing the polyurethane prepolymer with an organic solvent, fully stirring, adding modified calcium metaborate and a chain extender, continuously preserving heat and stirring for 3 hours, cooling to room temperature, and drying under reduced pressure after the reaction is finished to obtain a polyurethane composite material; the chain extender is 2-hydroxyethyl disulfide, and the molar ratio of the chain extender to polytetrahydrofuran ether glycol is 1:1.2; the organic solvent is N, N-dimethylformamide, and the mass volume ratio of the polyurethane prepolymer to the modified calcium metaborate to the organic solvent is 10g:2.2g:150mL.
Example 2
A production process of a flame-retardant wear-resistant polyurethane composite material comprises the following steps:
(1) Preparation of calcium metaborate:
weighing calcium hydroxide and boric acid, mixing into deionized water, stirring at a speed of 200r/min for 3 hours at room temperature, vacuum filtering, collecting solid, washing with water until the pH value of the washing solution is 7, drying in a baking oven at 150 ℃ for 2 hours, and crushing to obtain calcium metaborate; the mass volume ratio of the calcium hydroxide to the boric acid to the deionized water is 1.3g:2.5g:20mL.
(2) Epoxidized calcium metaborate:
dispersing an epoxy silane coupling agent in deionized water, fully stirring, adding calcium metaborate, heating to 55 ℃, preserving heat at a speed of 200r/min, stirring for 4 hours, vacuum-filtering to collect solid after the reaction is finished, washing with water for three times, and vacuum-drying to obtain epoxidized calcium metaborate; the epoxy silane coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane, and the mass volume ratio of calcium metaborate, the epoxy silane coupling agent and deionized water is 1g:0.1g:10mL.
(3) Modified calcium metaborate:
Mixing the calcium metaborate and the tetrahydrofuran, fully stirring to be uniform, adding 4,4' -diaminodiphenyl ether, heating to boiling, condensing, refluxing, stirring and reacting for 5 hours, after the reaction is finished, vacuum filtering and collecting solids, washing for three times by using acetone, and vacuum drying to obtain modified calcium metaborate; the mass volume ratio of the calcium metaborate, the 4,4' -diaminodiphenyl ether and the tetrahydrofuran is 1g:0.25g:10mL.
(4) Preparing polyurethane prepolymer:
weighing polytetrahydrofuran ether glycol, dehydrating, placing in a reaction container, introducing nitrogen to replace air, heating to 70 ℃, adding isophorone diisocyanate, uniformly mixing, adding an organotin catalyst T12, wherein the addition amount is 1.5% of the mass of polytetrahydrofuran ether glycol, and carrying out heat preservation and stirring reaction for 2 hours to obtain polyurethane prepolymer; the molecular weight of the polytetrahydrofuran ether glycol is 1000, and the molar ratio of polytetrahydrofuran ether glycol to isophorone diisocyanate is 1:1.8.
(5) Preparing a polyurethane composite material:
Mixing the polyurethane prepolymer with an organic solvent, fully stirring, adding modified calcium metaborate and a chain extender, continuously preserving heat and stirring for 2 hours, cooling to room temperature, and drying under reduced pressure after the reaction is finished to obtain a polyurethane composite material; the chain extender is 4,4' -dithiodiphenylamine, and the molar ratio of the chain extender to polytetrahydrofuran ether glycol is 1:1.1; the organic solvent is toluene, and the mass-volume ratio of the polyurethane prepolymer to the modified calcium metaborate to the organic solvent is 10g:1.6g:100mL.
Example 3
A production process of a flame-retardant wear-resistant polyurethane composite material comprises the following steps:
(1) Preparation of calcium metaborate:
weighing calcium hydroxide and boric acid, mixing into deionized water, stirring at a speed of 300r/min for 5 hours at room temperature, vacuum filtering, collecting solid, washing until the pH value of the washing solution is 7, drying in a 160 ℃ oven for 6 hours, and crushing to obtain calcium metaborate; the mass volume ratio of the calcium hydroxide to the boric acid to the deionized water is 2.1g:3.5g:30mL.
(2) Epoxidized calcium metaborate:
Dispersing an epoxy silane coupling agent in deionized water, fully stirring, adding calcium metaborate, heating to 65 ℃, preserving heat at a speed of 300r/min, stirring for 8 hours, vacuum-filtering to collect solid after the reaction is finished, washing with water for three times, and vacuum-drying to obtain epoxidized calcium metaborate; the epoxy silane coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane, and the mass volume ratio of calcium metaborate, the epoxy silane coupling agent and deionized water is 1g:0.4g:20mL.
(3) Modified calcium metaborate:
Mixing the calcium metaborate and the tetrahydrofuran, fully stirring to be uniform, adding 4,4' -diaminodiphenyl ether, heating to boiling, condensing, refluxing, stirring and reacting for 6 hours, after the reaction is finished, vacuum filtering and collecting solids, washing for three times by using acetone, and vacuum drying to obtain modified calcium metaborate; the mass volume ratio of the calcium metaborate, the 4,4' -diaminodiphenyl ether and the tetrahydrofuran is 1g:0.43g:20mL.
(4) Preparing polyurethane prepolymer:
Weighing polytetrahydrofuran ether glycol, dehydrating, placing in a reaction container, introducing nitrogen to replace air, heating to 80 ℃, adding isophorone diisocyanate, uniformly mixing, adding an organotin catalyst T12, wherein the addition amount is 3.5% of the mass of polytetrahydrofuran ether glycol, and carrying out heat preservation and stirring reaction for 4 hours to obtain polyurethane prepolymer; the molecular weight of the polytetrahydrofuran ether glycol is 2000, and the molar ratio of polytetrahydrofuran ether glycol to isophorone diisocyanate is 1:2.2.
(5) Preparing a polyurethane composite material:
Mixing the polyurethane prepolymer with an organic solvent, fully stirring, adding modified calcium metaborate and a chain extender, continuously preserving heat and stirring for 4 hours, cooling to room temperature, and drying under reduced pressure after the reaction is finished to obtain a polyurethane composite material; the chain extender is 2-hydroxyethyl disulfide, and the molar ratio of the chain extender to polytetrahydrofuran ether glycol is 1:1.3; the organic solvent is N, N-dimethylformamide, and the mass volume ratio of the polyurethane prepolymer to the modified calcium metaborate to the organic solvent is 10g:2.8g:200mL.
Comparative example 1
The production process of the polyurethane composite material differs from example 1 only in that no modified calcium metaborate is added.
Comparative example 2
The production process of the polyurethane composite material is different from example 1 only in that modified calcium metaborate (prepared in the same manner as in step (1) of example 1)) is replaced with calcium metaborate.
Comparative example 3
The production process of the polyurethane composite material is different from that of example 1 only in that modified calcium metaborate is replaced by a mixture of 4,4 '-diaminodiphenyl ether and calcium metaborate, and the mass ratio of the 4,4' -diaminodiphenyl ether to the calcium metaborate is 0.34:1.
The polyurethane composites prepared in example 1 and comparative examples 1 to 3 were subjected to performance test and comparison, and the results are shown in table 1:
Detection standard: tensile strength and elongation at break are referenced in GB/T1447-2005; abrasion resistance reference GB/T1689-1998, the amount of abrasion was measured using an Aldrich abrasion tester.
TABLE 1
| Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Tensile Strength (MPa) | 42.3 | 33.0 | 37.6 | 39.2 |
| Elongation at break (%) | 557 | 546 | 523 | 535 |
| Hardness (Shore A) | 81 | 72 | 75 | 78 |
| Limiting oxygen index (%) | 28 | 20 | 23 | 25 |
| Abrasion loss (cm 3) | 0.29 | 0.42 | 0.37 | 0.34 |
As can be seen from table 1, the tires prepared in example 1 have higher tensile strength and elongation at break, indicating that they have stronger mechanical strength; the hardness and abrasion loss are higher, which means that the surface hardness is high and the abrasion resistance is good; the limiting oxygen index is higher, which indicates that the flame retardant effect is better. Thus, it can be seen that example 1 of the present invention has higher strength, abrasion resistance and flame retardancy than other comparative examples, and is more suitable for use as a tire material.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed 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. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. The production process of the flame-retardant wear-resistant polyurethane composite material is characterized by comprising the following steps of:
(1) Preparation of calcium metaborate:
Weighing calcium hydroxide and boric acid, mixing into deionized water, stirring for reaction at room temperature, vacuum filtering to collect solid, washing with water until the pH value of the washing solution is 7, drying in an oven, and crushing to obtain calcium metaborate;
(2) Epoxidized calcium metaborate:
dispersing an epoxy silane coupling agent in deionized water, fully stirring, adding calcium metaborate, heating, stirring, vacuum filtering, collecting solid after the reaction is finished, washing with water for three times, and vacuum drying to obtain epoxidized calcium metaborate;
(3) Modified calcium metaborate:
mixing the epoxidized calcium metaborate and tetrahydrofuran, fully stirring until the mixture is uniform, adding 4,4' -diaminodiphenyl ether, heating to boiling, condensing, refluxing, stirring and reacting for 5-6 hours, after the reaction is finished, vacuum filtering and collecting solids, washing the solids with acetone for three times, and vacuum drying to obtain modified calcium metaborate;
(4) Preparing polyurethane prepolymer:
Weighing polytetrahydrofuran ether glycol, dehydrating, placing in a reaction container, introducing nitrogen to replace air, heating to 70-80 ℃, adding isophorone diisocyanate, uniformly mixing, adding an organotin catalyst, and reacting for 2-4 hours under heat preservation and stirring to obtain polyurethane prepolymer;
(5) Preparing a polyurethane composite material:
Mixing the polyurethane prepolymer with an organic solvent, fully stirring, adding modified calcium metaborate and a chain extender, continuously preserving heat and stirring for 2-4h, cooling to room temperature, and drying under reduced pressure after the reaction is finished to obtain the polyurethane composite material.
2. The production process of the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (1), the mass volume ratio of calcium hydroxide, boric acid and deionized water is (1.3-2.1) g (2.5-3.5) g: (20-30) mL.
3. The process for producing the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (1), the stirring reaction process is stirring treatment at a speed of 200-300r/min for 3-5h; drying is carried out in an oven at 150-160 ℃ for 2-6h.
4. The production process of the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (2), the epoxy silane coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane, and the mass volume ratio of calcium metaborate, the epoxy silane coupling agent and deionized water is 1g (0.1-0.4 g): (10-20) mL.
5. The process for producing the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (2), the temperature-raising and stirring treatment is carried out at a speed of 200-300r/min for 4-8h under the condition of 55-65 ℃.
6. The production process of the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (3), the mass-volume ratio of the epoxidized calcium metaborate, the 4,4' -diaminodiphenyl ether and the tetrahydrofuran is 1g (0.25-0.43 g): (10-20) mL.
7. The process for producing a flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (4), the molecular weight of polytetrahydrofuran ether glycol is 1000-2000, and the molar ratio of polytetrahydrofuran ether glycol to isophorone diisocyanate is 1:1.8-2.2.
8. The production process of the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (4), the organotin catalyst is T9 or T12, and the addition amount of the organotin catalyst is 1.5-3.5% of the mass of polytetrahydrofuran ether glycol.
9. The process for producing a flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (5), the chain extender is 2-hydroxyethyl disulfide or 4,4' -dithiodiphenylamine, and the molar ratio of the chain extender to polytetrahydrofuran ether glycol is 1:1.1-1.3.
10. The production process of the flame-retardant and wear-resistant polyurethane composite material according to claim 1, wherein in the step (5), the organic solvent is N, N-dimethylformamide or toluene, and the mass-volume ratio of the polyurethane prepolymer to the modified calcium metaborate to the organic solvent is 10g (1.6-2.8 g): (100-200) mL.
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| CN119039765A (en) * | 2024-10-30 | 2024-11-29 | 淮北师范大学 | High-temperature-resistant ceramic polyurethane composite material and preparation method thereof |
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