Insulating special plastic boot with temperature control chip
By using insulating rubber and polyurethane composite materials in protective boots, equipped with electric heating components and temperature control chips, the problems of poor insulation performance and insufficient insulation performance in cold environments are solved, and efficient energy preservation and Safe insulation performance.
Patent Information
- Application Number
- CN202411583855.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-02-18
AI Technical Summary
Existing protective boots have poor insulation performance in cold environments and fast heat dissipation, resulting in high energy consumption. At the same time, their insulation performance is insufficient, making it difficult to meet the needs of power repair personnel.
The shoe body is made of composite molded insulating materials and polyurethane, and is equipped with electric heating components and temperature control chips to ensure the maintenance and regulation of the temperature inside the shoe. Insulating materials are prepared through specific chemical reaction processes to form materials with good insulation and insulation properties.
It achieves good insulation and insulation performance under extreme cold conditions, reduces energy consumption, and improves the wear resistance and cleaning of the boots.
Smart Images
Figure BDA0005123822150000021 
Figure BDA0005123822150000031 
Figure BDA0005123822150000032
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of special labor protection products, and in particular relates to an insulating special plastic boot with a temperature control chip. Background Art
[0002] Protective boots are used to protect the feet of workers. Different types of protective boots are selected according to the nature and degree of hazards in the working environment. In the north of my country, the temperature in winter reaches dozens of degrees below zero Celsius, and cold-proof protective boots must be worn to prevent frostbite on the feet.
[0003] Most of the existing protective boots are made of polyurethane. In order to improve their cold-proof performance, thick wool felt, down felt and other materials are usually added inside the protective boots to reduce heat loss. Such protective boots are thick and difficult to clean. In the prior art, there are also electrically heated protective boots, but their thermal insulation performance is poor, and heat loss is fast, resulting in high energy consumption. For power repair personnel or power workers, protective boots must have good insulation performance. Therefore, the present invention aims to provide a special plastic boot that is light, has good thermal insulation performance and good insulation performance, which is suitable for high-voltage operations in cold areas. Summary of the invention
[0004] In order to overcome the technical problems mentioned in the background technology, the purpose of the present invention is to provide an insulating special plastic boot with a temperature control chip.
[0005] The technical problems to be solved by the present invention are:
[0006] The purpose of the present invention can be achieved through the following technical solutions:
[0007] An insulating special plastic boot with a temperature control chip, comprising a boot body and an electric heating component, wherein the boot body is made of an inner layer of insulating rubber and an outer layer of polyurethane by composite molding, and the polyurethane has good wear resistance and is arranged on the outer layer of the boot body as a protective layer of the boot body, and the insulating rubber has good insulation and heat preservation properties, and can maintain the temperature inside the boot by heating with the electric heating component to prevent frostbite on the feet of operators;
[0008] The insulating rubber material is prepared by the following steps:
[0009] Step A1: tetramethylhydroquinone and anhydrous ethanol are added to a reactor, the temperature is controlled at 50-60° C., the stirring speed is 300-360 r / min, and the stirring is performed for 10 min. Then, a silane coupling agent KH560 and potassium hydroxide are added, nitrogen is filled into the reactor, the air in the reactor is discharged, the stirring speed is 120-150 r / min, and the reaction is refluxed for 3-5 h. The reaction is filtered, and then the potassium hydroxide and anhydrous ethanol in the reaction solution are removed by vacuum rotary evaporation to obtain an intermediate 1. Under the catalytic action of potassium hydroxide, the epoxy group on the silane coupling agent KH560 molecule and the phenolic hydroxyl group on the tetramethylhydroquinone molecule undergo a ring-opening reaction, and a silicon-oxygen bond is introduced into the tetramethylhydroquinone molecule;
[0010] The specific reaction process is as follows:
[0011]
[0012] Step A2: Take intermediate 1 and potassium permanganate and add them to a reactor, raise the temperature to 70-90°C, stir and reflux for reaction for 8-10h, add phosphorus pentoxide to the reaction solution under nitrogen protection, continue stirring and reacting for 2-3h, then filter the reaction solution, and evaporate the filtrate under reduced pressure to obtain crystals to obtain intermediate 2. The methyl group on the benzene ring of intermediate 1 is oxidized to a carboxyl group by potassium permanganate, and then dehydrated by phosphorus pentoxide to form anhydride;
[0013] The specific reaction process is as follows:
[0014]
[0015] Step A3: taking intermediate 2 and dimethyl sulfoxide, adding them to a stirrer and stirring until they are completely dissolved, then adding p-phenylenediamine to the reactor, raising the temperature to 75-82° C., controlling the stirring speed to 150-200 r / min, and reflux reacting for 2-3 hours, the reaction solution is split with deionized water, and the lower layer of oily liquid is taken to obtain intermediate 3, and p-phenylenediamine is condensed with the anhydride group on intermediate 2 to generate a polymer containing an amide group;
[0016] The specific reaction process is as follows:
[0017]
[0018] Step A4: Take intermediate 3 and deionized water and add them into a reactor, add hydrochloric acid solution to adjust the pH value of the mixed solution to 4-5, heat it to 42-50°C, control the stirring speed to 80-100r / min, add tetraethyl orthosilicate dropwise into the reactor, stir and react for 2-3h to obtain a gel-like liquid, then add ammonia water to the reactor to adjust the pH value of the reaction solution to 7, let it stand to separate, remove the lower layer of gel, and obtain an insulating rubber compound.
[0019] The specific reaction process is as follows:
[0020]
[0021]
[0022] Furthermore, in step A1, the molar ratio of tetramethylhydroquinone to silane coupling agent KH560 is 1:2.2-2.3, the amount of anhydrous ethanol is 1.3 times the mass of the silane coupling agent KH560, and the amount of potassium hydroxide is 0.01 times the mass of the silane coupling agent KH560.
[0023] Furthermore, in step A2, the usage ratio of intermediate 1, potassium permanganate and phosphorus pentoxide is 100 mL: 3-5 g: 8-10 g.
[0024] Furthermore, in step A3, the usage ratio of intermediate 2, dimethyl sulfoxide and p-phenylenediamine is 15 g:30 mL:5.5-7 g.
[0025] Furthermore, in step A4, the usage ratio of intermediate 3, deionized water and ethyl orthosilicate is 55 mL: 10-13 mL: 75-80 mL, the mass fraction of hydrochloric acid solution is 20%, and the mass fraction of ammonia water is 15%.
[0026] Furthermore, the electric heating component includes a thermostat, an electric heating insole and a mounting seat. The upper of the boot body is provided with a mounting groove, the mounting seat is glued in the mounting groove, the top surface and the outer side surface of the mounting seat are provided with waterproof sockets, a battery is provided inside the mounting seat, a plug is provided on the bottom surface of the electric heating insole, and the plug is adapted to be plugged into the waterproof socket, a temperature sensor is provided inside the electric heating insole, the thermostat is embedded and installed on the upper of the boot body, and the thermostat, the electric heating insole and the battery are electrically connected to each other.
[0027] Beneficial effects of the present invention:
[0028] 1. The present invention provides an insulating rubber material. The insulating rubber material introduces a silicon-oxygen bond into the tetramethylhydroquinone molecule through a ring-opening reaction between a phenolic hydroxyl group on a tetramethylhydroquinone molecule and an epoxy group on a silane coupling agent KH560 molecule to prepare an intermediate 1. The methyl group on the intermediate 1 molecule is oxidized to a carboxyl group and then dehydrated to prepare an intermediate 2. The intermediate 2 is a dianhydride. The intermediate 2 is reacted with p-phenylenediamine to prepare an intermediate 3. The intermediate 3 is a polyimide with excellent insulating properties. Finally, tetraethyl orthosilicate is used as a silicon source, which is hydrolyzed and condensed with the silicon-oxygen structure on the side chain of the intermediate 3 to form a spatial network structure. During the compression molding process, the solvent is removed to form an aerogel with good thermal insulation effect.
[0029] 2. The protective boots provided by the present invention are composed of a boot body and an electric heating component. The boot body is made of an inner layer of insulating rubber and an outer layer of polyurethane composite molding. Polyurethane has good wear resistance and serves as a protective layer for the boot body. The insulating rubber has good thermal insulation performance and cooperates with the electric heating component to regulate the temperature inside the boot to meet the use requirements under extremely cold conditions. DETAILED DESCRIPTION
[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] Example 1
[0032] This embodiment prepares an insulating rubber material, and the specific preparation process is as follows:
[0033] Step A1: 1 mol tetramethylhydroquinone and anhydrous ethanol are added to a reactor, the temperature is controlled to 50° C., the stirring speed is 300 r / min, and the stirring is performed for 10 min. Then, 2.2 mol silane coupling agent KH560 and potassium hydroxide are added, nitrogen is filled into the reactor, the air in the reactor is discharged, the stirring speed is 120 r / min, and the reaction is refluxed for 3 h. The reaction is filtered, and then the potassium hydroxide and anhydrous ethanol in the reaction solution are removed by reduced pressure rotary evaporation to obtain intermediate 1, wherein the amount of anhydrous ethanol is 1.3 times the mass of the silane coupling agent KH560, and the amount of potassium hydroxide is 0.01 times the mass of the silane coupling agent KH560;
[0034] Step A2: 100 mL of intermediate 1 and 3 g of potassium permanganate were added to a reactor, the temperature was raised to 70°C, and the mixture was stirred and refluxed for 8 h. Under nitrogen protection, 8 g of phosphorus pentoxide was added to the reaction solution, and the reaction was continued with stirring for 2 h. The reaction solution was then filtered, and the filtrate was evaporated under reduced pressure to obtain crystals to obtain intermediate 2;
[0035] Step A3: 15 g of intermediate 2 and 30 mL of dimethyl sulfoxide were added to a stirrer and stirred until completely dissolved, and then 5.5 g of p-phenylenediamine was added to the reactor, the temperature was raised to 75°C, the stirring speed was controlled to 150 r / min, and the reaction was refluxed for 2 h. The reaction solution was split with deionized water, and the lower layer of oily liquid was taken to obtain intermediate 3;
[0036] Step A4: Take 55mL of intermediate 3 and 10mL of deionized water and add them into a reactor, add 20% hydrochloric acid solution by mass to adjust the pH value of the mixed solution to 4, heat to 42°C, control the stirring speed to 80r / min, add 75mL of tetraethyl orthosilicate dropwise into the reactor, stir and react for 2h to obtain a gel-like liquid, then add 15% ammonia water by mass to the reactor to adjust the pH value of the reaction solution to 7, let stand and separate, remove the lower layer of gel to obtain an insulating rubber compound.
[0037] Example 2
[0038] This embodiment prepares an insulating rubber material, and the specific preparation process is as follows:
[0039] Step A1: 1 mol tetramethylhydroquinone and anhydrous ethanol are added to a reactor, the temperature is controlled to 55° C., the stirring speed is 330 r / min, and the stirring is performed for 10 min. Then, 2.2 mol silane coupling agent KH560 and potassium hydroxide are added, nitrogen is filled into the reactor, the air in the reactor is discharged, the stirring speed is 140 r / min, and the reaction is refluxed for 4 h. The reaction is filtered, and then the potassium hydroxide and anhydrous ethanol in the reaction solution are removed by vacuum rotary evaporation to obtain intermediate 1, wherein the amount of anhydrous ethanol is 1.3 times the mass of the silane coupling agent KH560, and the amount of potassium hydroxide is 0.01 times the mass of the silane coupling agent KH560;
[0040] Step A2: 100 mL of intermediate 1 and 4 g of potassium permanganate were added to a reactor, the temperature was raised to 80°C, and the mixture was stirred and refluxed for 9 h. Under nitrogen protection, 9 g of phosphorus pentoxide was added to the reaction solution, and the reaction was continued with stirring for 2 h. The reaction solution was then filtered, and the filtrate was evaporated under reduced pressure to obtain crystals to obtain intermediate 2;
[0041] Step A3: 15 g of intermediate 2 and 30 mL of dimethyl sulfoxide were added to a stirrer and stirred until completely dissolved, and then 6 g of p-phenylenediamine was added to the reactor, the temperature was raised to 80°C, the stirring speed was controlled to 180 r / min, and the reaction was refluxed for 2 h. The reaction solution was split with deionized water, and the lower layer of oily liquid was taken to obtain intermediate 3;
[0042] Step A4: Take 55 mL of intermediate 3 and 12 mL of deionized water and add them into a reactor, add 20% hydrochloric acid solution by mass to adjust the pH value of the mixed solution to 4, heat to 45°C, control the stirring speed to 90 r / min, add 77 mL of ethyl orthosilicate dropwise into the reactor, stir and react for 2 hours to obtain a gel-like liquid, then add ammonia water into the reactor to adjust the pH value of the reaction solution to 7, let it stand to separate, remove the lower layer of gel, and obtain an insulating rubber compound.
[0043] Example 3
[0044] This embodiment prepares an insulating rubber material, and the specific preparation process is as follows:
[0045] Step A1: 1 mol tetramethylhydroquinone and anhydrous ethanol are added to a reactor, the temperature is controlled to 60° C., the stirring speed is 360 r / min, and the stirring is performed for 10 min. Then, 2.3 mol silane coupling agent KH560 and potassium hydroxide are added, nitrogen is filled into the reactor, the air in the reactor is discharged, the stirring speed is 150 r / min, and the reaction is refluxed for 5 h. The reaction is filtered, and then the potassium hydroxide and anhydrous ethanol in the reaction solution are removed by vacuum rotary evaporation to obtain intermediate 1, wherein the amount of anhydrous ethanol is 1.3 times the mass of the silane coupling agent KH560, and the amount of potassium hydroxide is 0.01 times the mass of the silane coupling agent KH560;
[0046] Step A2: 100 mL of intermediate 1 and 5 g of potassium permanganate were added to a reactor, the temperature was raised to 90°C, and the mixture was stirred and refluxed for 10 h. 10 g of phosphorus pentoxide was added to the reaction solution under nitrogen protection, and the reaction was continued with stirring for 3 h. The reaction solution was then filtered, and the filtrate was evaporated under reduced pressure to obtain crystals to obtain intermediate 2;
[0047] Step A3: 15 g of intermediate 2 and 30 mL of dimethyl sulfoxide were added to a stirrer and stirred until completely dissolved, and then 7 g of p-phenylenediamine was added to the reactor, the temperature was raised to 82°C, the stirring speed was controlled to 200 r / min, and the reaction was refluxed for 3 h. The reaction solution was split with deionized water, and the lower layer of oily liquid was taken to obtain intermediate 3;
[0048] Step A4: Take 55 mL of intermediate 3 and 13 mL of deionized water and add them into a reactor, add 20% hydrochloric acid solution by mass to adjust the pH value of the mixed solution to 5, heat to 50°C, control the stirring speed to 100 r / min, add 80 mL of tetraethyl orthosilicate dropwise into the reactor, stir and react for 3 hours to obtain a gel-like liquid, then add ammonia water into the reactor to adjust the pH value of the reaction solution to 7, let it stand to separate, remove the lower layer of gel, and obtain an insulating rubber compound.
[0049] Example 4
[0050] This embodiment prepares an insulating special plastic boot with a temperature control chip, and the specific preparation process is as follows:
[0051] Preparation of inner layer: Take the insulating rubber material prepared in Example 1, preheat it to 80° C. and add it into a molding machine, press the insulating rubber material into a mold, and cool it to room temperature to prepare the inner layer;
[0052] Preparation of boot body: placing the inner layer and the inner mold into a molding machine, melting polyurethane (UH-64D20 polyurethane for shoes) and adding it into the molding machine and pressing it on the surface of the inner layer, cooling and solidifying, demolding, and then placing it in a 40°C air drying room for 5 hours to obtain the boot body;
[0053] Assembly: a mounting groove is provided on the upper of the boot body, a mounting seat is glued into the mounting groove, a waterproof socket is provided on the top and outside of the mounting seat, a battery is installed inside the mounting seat, an electric heating insole is provided on the sole of the boot, a plug which is adapted to be plugged into the waterproof socket is provided on the bottom of the electric heating insole, a temperature sensor is provided inside the electric heating insole, a thermostat is embedded and installed on the upper of the boot body, the thermostat, the electric heating insole and the battery are electrically connected to each other, and an insulating special plastic boot with a temperature control chip is made.
[0054] Comparative Example 1
[0055] In this comparative example, an insulating special plastic boot with a temperature control chip is prepared. The specific preparation process is the same as that of Example 4, except that the insulating rubber material is replaced with the same amount of polyurethane.
[0056] Comparative Example 2
[0057] This comparative example is a commercially available electric heating shoe (Hjort EH heating shoe).
[0058] Comparative Example 3
[0059] This comparative example is a commercially available insulating protective boot.
[0060] Taking Example 4, Comparative Example 1 and Comparative Example 3, the upper material was made into samples according to GB 12011-2000 standard, and the durability performance test was carried out. The specific data are shown in Table 1:
[0061] Table 1
[0062]
[0063] It can be seen from Table 1 that the protective boots prepared in Example 4 have a leakage current of 2.1 mA under 30 kV conditions, which is much lower than commercially available insulating protective boots and has good insulation performance. Comparative Example 1 is made of polyurethane material, and the leakage current under the same conditions reaches 13.7 mA, which exceeds the safety standard requirement of 10 mA. This is because the inner layer of Example 4 is made of insulating rubber, which is a polyimide material with good insulation performance.
[0064] Example 4 and Comparative Examples 1-3 were used to test the thermal insulation performance: the temperature inside the boots was heated to 30°C using a hot air blower, a temperature sensor was placed inside the protective boots, the boot opening was sealed with thermal insulation cotton, and the protective boots were placed in a -5°C environment, and the temperature inside the protective boots was measured. The specific data are shown in Table 2:
[0065] Table 2
[0066] 10min 15min 20min 25min Example 4 21℃ 16℃ 12℃ 9℃ Comparative Example 1 11℃ 3℃ -2℃ -4℃ Comparative Example 2 16℃ 9℃ 4℃ 1℃ Comparative Example 3 13℃ 5℃ 0℃ -2℃
[0067] As can be seen from Table 2, the temperature inside the protective boots prepared in Example 4 was 9°C after 25 minutes of testing, the temperature inside the boots of Comparative Example 2, which is an electric heating boot for cold protection, was only 1°C, and the temperatures inside the boots of Comparative Examples 1 and 3 were both reduced to below 0°C, indicating that Example 4 has good thermal insulation performance. This is because the inner layer of Example 4 is made of insulating rubber compound. During the preparation of the insulating rubber compound, ethyl orthosilicate is used as a silicon source, which is hydrolyzed and condensed with the silicon-oxygen structure on the side chain of intermediate 3 to form a spatial network structure. During the compression molding process, the solvent is removed to form an aerogel structure, which has a good thermal insulation effect.
[0068] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0069] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.
Claims
1. An insulating special plastic boot with a temperature control chip, comprising a boot body and an electric heating component, characterized in that: The boot body is made of composite molding of inner layer insulating rubber and outer layer polyurethane; The insulating rubber material is prepared by the following steps: Step A1: Take tetramethylhydroquinone and anhydrous ethanol, stir and mix at 50-60° C., add silane coupling agent KH560 and potassium hydroxide, reflux for 3-5 hours under nitrogen protection, filter the reaction solution, and evaporate under reduced pressure to obtain intermediate 1; Step A2: Mix the intermediate 1 and potassium permanganate, raise the temperature to 70-90°C, stir and reflux for 8-10h, add phosphorus pentoxide under nitrogen protection, stir and react for 2-3h, then filter the reaction solution, and evaporate the filtrate under reduced pressure to obtain intermediate 2; Step A3: Take intermediate 2 and dimethyl sulfoxide and stir until dissolved, add p-phenylenediamine, raise the temperature to 75-82°C, stir and reflux for 2-3h, split the reaction solution with deionized water, take the lower layer of oily liquid, and obtain intermediate 3; Step A4: Take intermediate 3 and deionized water, add hydrochloric acid solution to adjust the pH value of the mixed solution to 4-5, raise the temperature to 42-50°C, add tetraethyl orthosilicate dropwise while stirring, continue stirring and react for 2-3 hours after the addition to obtain a gel-like liquid, then add ammonia water to adjust the pH value to 7, let stand to separate, remove the lower layer of gel, and obtain an insulating rubber compound.
2. The insulating special plastic boot with a temperature control chip according to claim 1, characterized in that: In step A1, the molar ratio of tetramethylhydroquinone to silane coupling agent KH560 is 1:2.2-2.3, the amount of anhydrous ethanol is 1.3 times the mass of the silane coupling agent KH560, and the amount of potassium hydroxide is 0.01 times the mass of the silane coupling agent KH560.
3. The insulating special plastic boot with a temperature control chip according to claim 1, characterized in that: In step A2, the usage ratio of intermediate 1, potassium permanganate and phosphorus pentoxide is 100 mL: 3-5 g: 8-10 g.
4. The insulating special plastic boot with a temperature control chip according to claim 1, characterized in that: In step A3, the usage ratio of intermediate 2, dimethyl sulfoxide and p-phenylenediamine is 15 g:30 mL:5.5-7 g.
5. The insulating special plastic boot with a temperature control chip according to claim 1, characterized in that: In step A4, the usage ratio of intermediate 3, deionized water and ethyl orthosilicate is 55 mL: 10-13 mL: 75-80 mL, the mass fraction of hydrochloric acid solution is 20%, and the mass fraction of ammonia water is 15%.
6. The insulating special plastic boot with a temperature control chip according to claim 1, characterized in that: The electric heating component includes a thermostat, an electric heating insole and a mounting seat. The upper of the boot body is provided with a mounting groove, the mounting seat is glued into the mounting groove, the top surface and the outer side surface of the mounting seat are provided with waterproof sockets, a battery is provided inside the mounting seat, a plug is provided on the bottom surface of the electric heating insole, and the plug is adapted to be plugged into the waterproof socket, a temperature sensor is provided inside the electric heating insole, and the thermostat is embedded and installed on the upper of the boot body.