High-temperature-resistant antibacterial plastic and preparation method thereof

An antibacterial plastic and high temperature resistant technology, which is applied in the field of high temperature resistant antibacterial plastic and its preparation, can solve the problems that high temperature objects cannot be used in sealed storage, processing and molding conditions are harsh, and sealing cannot be applied, so as to improve elasticity, high elastic deformation performance, The effect of improving flexibility

Pending Publication Date: 2019-09-10
唐海球
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of high temperature resistant antibacterial plastic and preparation method thereof, this plastic is prepared by compounding silanized polyimide and nitrile rubber, wherein polyimide group is contained in the silanized polyimide, and then make The polymer has strong high temperature resistance. At the same time, the silanized tetracarboxylic acid monomer contains siloxane bonds. After polymerization, the polymer contains a large number of siloxane bonds, which greatly improves the high temperature resistance of the polymer. Compared with traditional polyimide polymer materials, the high temperature resistance performance is greatly increased, and at the same time, the introduction of a large number of siloxane bonds in the polymer improves the flexibility of the polymer, thereby improving the elasticity of the polymer and reducing the difficulty of processing , nitrile rubber has high elastic deformation properties, but its high temperature resistance is low. After mixing silanized polyimide and nitrile rubber at the same time, the prepared plastic not only has the high temperature resistance of silanized polyimide At the same time, it has the high elastic deformation properties of nitrile rubber, so that the prepared plastic can be used for sealing at ultra-high temperatures, and then solves the problem that the existing polyimide has strong rigidity and harsh processing and molding conditions. Under high temperature and high pressure conditions, a method similar to powder metallurgy is used to die-cast the blank, and then sintered at a high temperature of 400 ° C. Due to the strict molding conditions, the application of the material is limited, and due to the strong rigidity of the material, the deformation performance is low. It cannot be used for sealing, and it cannot be used for the sealed storage of high-temperature objects

Method used

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  • High-temperature-resistant antibacterial plastic and preparation method thereof
  • High-temperature-resistant antibacterial plastic and preparation method thereof
  • High-temperature-resistant antibacterial plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The specific preparation process of silylated polyimide is as follows:

[0022] Step 1: Weigh 150g of tartaric acid and add it to 1L of acetone and stir to dissolve it. At the same time, add 138.3g of potassium hydroxide and 18.6g of nano-silicon dioxide powder to it, raise the temperature to 150-160°C for reflux reaction for 24h, and then carry out vacuum distillation to obtain silicon Potassium oxyalkyltetracarboxylate;

[0023] Step 2: Add 100 g of the potassium siloxane tetracarboxylate prepared in step 1 to 1.5 L of hydrochloric acid with a mass concentration of 1% and reflux at room temperature for 2-3 hours, then filter, wash and dry to obtain silanized tetracarboxylate acid, the reaction structure is as follows:

[0024]

[0025] Step 3: Add 199.5g of 2,4-diaminobenzenesulfonic acid and 1.2L of anhydrous N-methylpyrrolidone into the reaction flask, then continuously feed nitrogen into the reaction flask for 20-30min, and add 320g of For the silanized tetrac...

Embodiment 2

[0028] The specific preparation process of polyimide is as follows: add 199.5g of 2,4-diaminobenzenesulfonic acid and 1.2L of anhydrous N-methylpyrrolidone into the reaction flask, and then continuously feed nitrogen into the reaction flask for 20-30min, And add 218g of pyromellitic dianhydride to the reaction flask, heat up to 130-135°C for reflux reaction for 2-3h, then heat up to 180-185°C for reflux reaction for 5-6h, then centrifuge the product to obtain polyimide , the reaction structure is as follows:

[0029]

Embodiment 3

[0031] A preparation method of high temperature resistant antibacterial plastics, the specific preparation process is as follows:

[0032] In the first step, 700 g of the silanized polyimide prepared in Example 1 and 250 g of nitrile rubber are simultaneously added to the internal mixer and masticated at 120-130 ° C for 2-3 min;

[0033] In the second step, add 60g of plasticizer, 3g of sulfur and 10g of 2,8-di-tert-butyl-4-methylphenol to the internal mixer and keep the temperature constant for 5-8min;

[0034] The third step is to raise the temperature of the masticator to 200-210°C, then add 31g of sulfadiazine to it, and masticate for 10-12min to obtain plastic;

[0035]The fourth step is to add the plastic prepared in the third step into the open mill, adjust the roller distance to about 5mm to dissipate heat, and then carry out thin pass 2-3 times, turn over 1-2 times and then release the sheet, cool and park for 2-3h, Then put it into a flat vulcanizer for vulcanizatio...

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Abstract

The invention discloses a high-temperature-resistant antibacterial plastic which comprises the following components in parts by weight: 70-75 parts of silylanized polyimide, 25-27 parts of nitrile rubber, 6-8 parts of a plasticizer, 0.3-0.4 part of sulfur, 1-1.5 parts of 2,8-di-tert-butyl-4-methylphenol and 3.1-3.3 parts of sulfadiazine. As the nitrile rubber is compounded with silylanized polyimide to prepare the plastic, and the nitrile rubber has a good elastic deformation property, but is poor in high-temperature-resistant property, the plastic prepared by simultaneously smelting the silylanized polyimide and the nitrile rubber has not only the high-temperature-resistant property of the silylanized polyimide, but also the elastic deformation property of the nitrile rubber, furthermore,the prepared plastic can be applied to sealing at an ultrahigh temperature, and the problems that a conventional polyimide material is good in rigidity, low in deformation resistance, not applicableto sealing and not applicable to sealing storage of high-temperature articles, can be solved.

Description

technical field [0001] The invention belongs to the field of plastic preparation, and relates to a high-temperature-resistant antibacterial plastic and a preparation method thereof. Background technique [0002] Thermoplastic polyimide is a kind of high-temperature-resistant polymer material. Its outstanding feature is high-temperature resistance, which can withstand high temperatures of 250-400 ° C. It also has high low-temperature resistance and a wide range of operating temperatures. -400℃, also has excellent high creep resistance, high insulation, low dielectric constant, corrosion resistance, etc. It is widely used. However, due to the strong rigidity of polyimide, the processing and molding conditions are harsh, and it needs to be processed at high temperature and high pressure. Under the same conditions, the method similar to powder metallurgy is used to die-cast the blank, and then sintered at a high temperature of 400 ° C. Due to the strict molding conditions, the a...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L9/02C08K13/02C08K5/43C08G73/10
CPCC08L79/08C08G73/106C08G73/1078C08L2201/08C08L9/02C08K13/02C08K5/43
Inventor 梁文静唐海球
Owner 唐海球
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