阅读说明：本技术 一种温度传感器用强效耐热外壳及其制备方法 (Strong-effect heat-resistant shell for temperature sensor and preparation method thereof ) 是由 陈军 陈如根 孟祥松 于 2019-09-26 设计创作，主要内容包括：本发明提供一种温度传感器用强效耐热外壳及其制备方法,涉及温度传感器生产技术领域。所述强效耐热外壳由以下重量份的原料制成：ABS树脂40-50份、聚四氟乙烯15-20份、氰酸酯树脂10-15份、双马来酰亚胺6-10份、纳米氧化锌1.0-1.5份、己二酸二酰肼5-7份、双巯基乙酸异辛酯二正辛基锡2-4份、双丙烯酸丁二酯4-6份、粘土3-5份、硅藻土3-5份、γ氧化铝2-4份、玻璃纤维1.5-2.5份。本发明克服了现有技术的不足,能够有效提升外壳的耐热性能,防止其在外界条件下受热变形甚至熔化,进而影响其正常使用,外壳整体性能优异,热稳定性高,使用寿命长,适宜推广。(The invention provides a strong heat-resistant shell for a temperature sensor and a preparation method thereof, and relates to the technical field of temperature sensor production. The strong heat-resistant shell is prepared from the following raw materials in parts by weight: 40-50 parts of ABS resin, 15-20 parts of polytetrafluoroethylene, 10-15 parts of cyanate ester resin, 6-10 parts of bismaleimide, 1.0-1.5 parts of nano zinc oxide, 5-7 parts of adipic dihydrazide, 2-4 parts of isooctyl bis-n-octyl tin dimercaptoacetate, 4-6 parts of butylene diacrylate, 3-5 parts of clay, 3-5 parts of diatomite, 2-4 parts of gamma alumina and 1.5-2.5 parts of glass fiber. The invention overcomes the defects of the prior art, can effectively improve the heat resistance of the shell, prevents the shell from being heated, deformed and even melted under the external condition, and further influences the normal use of the shell, and has the advantages of excellent overall performance of the shell, high thermal stability, long service life and suitability for popularization.)

1. The strong heat-resistant shell for the temperature sensor is characterized by being prepared from the following raw materials in parts by weight: 40-50 parts of ABS resin, 15-20 parts of polytetrafluoroethylene, 10-15 parts of cyanate ester resin, 6-10 parts of bismaleimide, 1.0-1.5 parts of nano zinc oxide, 0.6-0.8 part of coupling agent, 5-7 parts of adipic dihydrazide, 2-4 parts of isooctyl bis-n-octyl tin bis-thioglycolate, 4-6 parts of butylene diacrylate, 3-5 parts of clay, 3-5 parts of diatomite, 2-4 parts of gamma alumina, 1.5-2.5 parts of glass fiber, 2-4 parts of plasticizer and 2-4 parts of dispersant.

2. The strong heat-resistant shell for the temperature sensor according to claim 1, wherein the strong heat-resistant shell is prepared from the following raw materials in parts by weight: 45 parts of ABS resin, 18 parts of polytetrafluoroethylene, 13 parts of cyanate ester resin, 8 parts of bismaleimide, 1.3 parts of nano zinc oxide, 0.7 part of coupling agent, 6 parts of adipic dihydrazide, 3 parts of isooctyl bis (n-octyl) tin bis (thioglycolate), 5 parts of butyl diacrylate, 4 parts of clay, 4 parts of diatomite, 3 parts of gamma alumina, 2.0 parts of glass fiber, 3 parts of plasticizer and 3 parts of dispersing agent.

3. A robust heat resistant housing for a temperature sensor as recited in claim 1, wherein said coupling agent is a silane coupling agent.

4. A robust heat resistant housing for a temperature sensor as recited in claim 1 wherein said plasticizer is a blend of diethyl phthalate, phthalate and dioctyl sebacate in a mass ratio of 2:1: 1.

5. The robust heat resistant housing of claim 1, wherein the dispersant is a mixture of polyacrylamide, sodium octyl sulfonate, and magnesium hydroxy silicate in a mass ratio of 5:3: 2.

6. A preparation method of a strong heat-resistant shell for a temperature sensor is characterized by comprising the following steps:

(1) mixing bismaleimide, nano zinc oxide and a coupling agent, adding the mixture into a reaction kettle, heating to 200-220 ℃, keeping the temperature, mixing for 1-1.5h, introducing argon, boosting the pressure to 12-16MPa, keeping the temperature, modifying for 40-60min, recovering to normal pressure, keeping the temperature, and standing for 1-2h to obtain a modified material for later use;

(2) mixing adipic dihydrazide, di-n-octyl tin isooctyl dimercaptoacetate and butylene diacrylate, adding into the reaction kettle in the step (1), keeping the temperature, mixing for 1-2h, and feeding the mixture into a high-speed dispersion machine for high-speed dispersion for 30-50min to obtain an auxiliary material A for later use;

(3) mixing clay and diatomite, adding a sulfuric acid solution with 4-6 times of volume into an ultrasonic oscillator, heating to 40-60 ℃, carrying out ultrasonic oscillation for 20-30min, filtering while the mixture is hot, adding deionized water, repeatedly washing for 2-4 times, filtering, mixing with gamma alumina and glass fiber, placing the mixture into a refrigerator, freezing at the temperature of-35 ℃ to-25 ℃ for 1-2h, carrying out low-temperature grinding, and continuously freezing for 2-3h to obtain an auxiliary material B for later use;

(4) mixing ABS resin, polytetrafluoroethylene and cyanate ester resin, adding into an internal mixer, heating to 240 ℃ at 220 ℃, keeping the temperature, and mixing for 2-3h to obtain a base material for later use;

(5) and (4) mixing the prepared auxiliary material A and the auxiliary material B, adding the mixture into the internal mixer in the step (4), adding a plasticizer and a dispersing agent, keeping the temperature, mixing for 3-5h, then pumping the mixture into a mold, and cooling and forming to obtain the product.

7. The method as claimed in claim 6, wherein the rotational speed of the heat-preserving and mixing in step (1) is 150-.

8. The method for preparing a robust heat-resistant housing for a temperature sensor according to claim 6, wherein the concentration of the sulfuric acid solution in the step (3) is 0.8-1.5mol/L, the frequency of the ultrasonic oscillator is 15-20kHz, and the ultrasonic sound intensity is 2-3W/cm²And mixed and ground to pass through a 200 mesh sieve.

Technical Field

The invention relates to the technical field of temperature sensor production, in particular to a strong heat-resistant shell for a temperature sensor and a preparation method thereof.

Background

A temperature sensor (temperature transducer) refers to a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument and has a plurality of varieties. The measurement method can be divided into a contact type and a non-contact type, and the measurement method can be divided into a thermal resistor and a thermocouple according to the characteristics of sensor materials and electronic elements.

Since the temperature sensor is used to measure the temperature of the environment, there are high demands on the quality of its housing. At present, the shell of the temperature sensor is usually made of plastics, so that the purpose of portability is achieved, but the shell is poor in heat resistance, so that the shell is easy to deform or even melt under external conditions, normal use of the shell is affected, and the service life of the shell is short.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the strong heat-resistant shell for the temperature sensor and the preparation method thereof, the defects of the prior art are overcome, the heat resistance of the shell can be effectively improved, the shell is prevented from being heated, deformed and even melted under the external condition, the normal use of the shell is further influenced, the overall performance of the shell is excellent, the thermal stability is high, the service life is long, and the preparation method is suitable for popularization.

In order to achieve the above purpose, the technical scheme of the invention is realized by the following technical scheme:

a strong heat-resistant shell for a temperature sensor is prepared from the following raw materials in parts by weight: 40-50 parts of ABS resin, 15-20 parts of polytetrafluoroethylene, 10-15 parts of cyanate ester resin, 6-10 parts of bismaleimide, 1.0-1.5 parts of nano zinc oxide, 0.6-0.8 part of coupling agent, 5-7 parts of adipic dihydrazide, 2-4 parts of isooctyl bis-n-octyl tin bis-thioglycolate, 4-6 parts of butylene diacrylate, 3-5 parts of clay, 3-5 parts of diatomite, 2-4 parts of gamma alumina, 1.5-2.5 parts of glass fiber, 2-4 parts of plasticizer and 2-4 parts of dispersant.

Preferably, the strong heat-resistant shell is prepared from the following raw materials in parts by weight: 45 parts of ABS resin, 18 parts of polytetrafluoroethylene, 13 parts of cyanate ester resin, 8 parts of bismaleimide, 1.3 parts of nano zinc oxide, 0.7 part of coupling agent, 6 parts of adipic dihydrazide, 3 parts of isooctyl bis (n-octyl) tin bis (thioglycolate), 5 parts of butyl diacrylate, 4 parts of clay, 4 parts of diatomite, 3 parts of gamma alumina, 2.0 parts of glass fiber, 3 parts of plasticizer and 3 parts of dispersing agent.

Preferably, the coupling agent is a silane coupling agent.

Preferably, the plasticizer is prepared by mixing diethyl phthalate, phthalate and dioctyl sebacate in a mass ratio of 2:1: 1.

Preferably, the dispersing agent is prepared by mixing polyacrylamide, sodium octyl sulfonate and magnesium silicate hydroxide according to the mass ratio of 5:3: 2.

The preparation method of the strong heat-resistant shell comprises the following steps:

(1) mixing bismaleimide, nano zinc oxide and a coupling agent, adding the mixture into a reaction kettle, heating to 200-220 ℃, keeping the temperature, mixing for 1-1.5h, introducing argon, boosting the pressure to 12-16MPa, keeping the temperature, modifying for 40-60min, recovering to normal pressure, keeping the temperature, and standing for 1-2h to obtain a modified material for later use;

(2) mixing adipic dihydrazide, di-n-octyl tin isooctyl dimercaptoacetate and butylene diacrylate, adding into the reaction kettle in the step (1), keeping the temperature, mixing for 1-2h, and feeding the mixture into a high-speed dispersion machine for high-speed dispersion for 30-50min to obtain an auxiliary material A for later use;

(3) mixing clay and diatomite, adding a sulfuric acid solution with 4-6 times of volume into an ultrasonic oscillator, heating to 40-60 ℃, carrying out ultrasonic oscillation for 20-30min, filtering while the mixture is hot, adding deionized water, repeatedly washing for 2-4 times, filtering, mixing with gamma alumina and glass fiber, placing the mixture into a refrigerator, freezing at the temperature of-35 ℃ to-25 ℃ for 1-2h, carrying out low-temperature grinding, and continuously freezing for 2-3h to obtain an auxiliary material B for later use;

(4) mixing ABS resin, polytetrafluoroethylene and cyanate ester resin, adding into an internal mixer, heating to 240 ℃ at 220 ℃, keeping the temperature, and mixing for 2-3h to obtain a base material for later use;

(5) and (4) mixing the prepared auxiliary material A and the auxiliary material B, adding the mixture into the internal mixer in the step (4), adding a plasticizer and a dispersing agent, keeping the temperature, mixing for 3-5h, then pumping the mixture into a mold, and cooling and forming to obtain the product.

Preferably, the rotation speed of the heat-preservation mixing in the step (1) is 150-.

Preferably, the concentration of the sulfuric acid solution in the step (3) is 0.8-1.5mol/L, the frequency of an ultrasonic oscillator is 15-20kHz, and the ultrasonic sound intensity is 2-3W/cm²And mixed and ground to pass through a 200 mesh sieve.

The invention provides a strong heat-resistant shell for a temperature sensor and a preparation method thereof, and compared with the prior art, the shell has the advantages that:

(1) the invention adopts ABS resin, polytetrafluoroethylene and cyanate ester resin as base materials, can effectively improve the heat resistance of the shell by utilizing the characteristics of the base materials, further improves the overall performance of the shell, and has good shell quality and convenient use.

(2) The bismaleimide, the nano zinc oxide, the adipic dihydrazide, the isooctyl bis-n-octyl tin bis-thioglycolate and the butylene diacrylate are added to prepare the auxiliary material A, the bismaleimide is modified by the nano zinc oxide under the conditions of high temperature and high pressure, and then the bismaleimide is mixed with other components and dispersed at a high speed, so that the heat resistance of the shell can be effectively improved, the shell is prevented from being heated, deformed and even melted under the external condition, the normal use of the shell is further influenced, the service life of the shell is long, and the use effect is good;

(3) according to the invention, clay, diatomite, gamma alumina and glass fiber are also added to prepare an auxiliary material B, the clay and the diatomite are subjected to acidification modification, and then the modified auxiliary material B is subjected to low-temperature freezing with other components, so that the clay and the diatomite can be matched with the auxiliary material A, the heat resistance of the shell is further improved, the overall performance of the shell is excellent, the thermal stability is high, and the shell is suitable for popularization.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.