High thermal-stability capped sulfone polymer, preparation method and application in tableware thereof

A high thermal stability, polymer technology, applied in the application, table utensils, table utensils, etc., can solve problems that affect diet health, easy to burn, colorants are not resistant to acid and alkali, etc., to achieve mildew resistance, excellent resistance The effect of high temperature resistance, toughness and high strength

Inactive Publication Date: 2019-11-15
江西金海新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bamboo and wood chopsticks are prone to mildew and deterioration, and are very easy to hide dirt, especially high carcinogens such as aflatoxin, which seriously affect dietary health; while plastic melamine chopsticks will volatilize during use and high-temperature disinfection. Harmful substances such as melamine and formaldehyde will also affect dietary health
Stainless steel chopsticks generally contain heavy metals except for medical-grade stainless steel, and when eating high-temperature meals, they are easy to conduct heat and burn easily, so they are not easy to use
[0007] At present, there are few patented inventions of chopsticks with PPSU as the base material. Patent CN 102690517B discloses a PPSU and PES copolymer as the base material, which also contains glass fiber, carbon fiber, basalt fiber, nano-silver, calcium powder 2 Parts to 10 parts, lithopone and carbon black and other blend materials are used to make chopsticks, the formula is relatively complicated, and various additives and coloring agents may have risks such as being not resistant to acid and alkali and easy to precipitate and dissolve.

Method used

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  • High thermal-stability capped sulfone polymer, preparation method and application in tableware thereof
  • High thermal-stability capped sulfone polymer, preparation method and application in tableware thereof
  • High thermal-stability capped sulfone polymer, preparation method and application in tableware thereof

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Embodiment 1

[0065] In this embodiment, a method for preparing a highly thermally stable end-capped sulfone polymer comprises the following steps:

[0066] (1) Salt-forming reaction: Add 93.10g (0.5mol) of 4,4'-dihydroxybiphenyl to a three-necked flask equipped with a thermometer, a nitrogen pipe, a condensing water separator, and a stirrer in sequence according to the ratio in Table 1 and 147.17g (0.5125mol) 4,4'-dichlorodiphenyl sulfone, then add 426g solvent sulfolane, stir and heat up to 80°C to dissolve the monomer until the solution is transparent, add 55.65g sodium carbonate, then add 80mL xylene, continue Under stirring, the temperature is raised to 140°C and the salt-forming reaction begins. The azeotrope formed by the water and xylene produced in the system is blown out by the protective gas into the condenser tube, condensed and dripped into the water separator for stratification, and the xylene in the upper layer flows back into the system. Medium; keep the temperature in the r...

Embodiment 2

[0075] The method is basically the same as that in Example 1. Add 93.10g (0.5mol) 4,4'-dihydroxybiphenyl and 145.37g (0.50625mol) 4,4'-dichlorodiphenylsulfone, then 520ml sulfolane solvent, stir and heat up Dissolve the monomer at 80°C until the solution is transparent, add 55.65g of sodium carbonate, then add 80mL of toluene, continue to stir and raise the temperature to 140°C to start the salt formation reaction, and collect water, keep the temperature in the range of 160°C-180°C, when there is no Water is generated, which proves that the salt is completely formed, then distills and releases toluene, gradually raises the temperature to 230°C and starts the polymerization reaction at a constant temperature for 3 hours until the torque of the stirring motor remains unchanged, indicating that the viscosity of the system is basically constant. Cool down to 180°C, add 0.56g (0.00625mol ) mixed solution of dimethyl carbonate and 6g sulfolane, continue to react for 30min; stop stirr...

Embodiment 3

[0077] The method is basically the same as that of Example 1, and 125.135 g (0.5 mol) of 4,4'-dihydroxydiol was sequentially added to a three-necked flask equipped with a thermometer, a nitrogen pipe, a condensing water separator, and a stirrer according to the proportions in Table 1. Phenylsulfone and 145.877g (0.508mol) 4,4'-dichlorodiphenylsulfone, and then 520ml of N-methylpyrrolidone solvent, stirred and heated to 80 ° C to dissolve the monomer until the solution was transparent, added 55.65g of sodium carbonate, and then added 80mL of xylene, continue to stir and raise the temperature to 140°C to start the salt-forming reaction. The azeotrope formed by the water and xylene produced in the system is blown out by the protective gas into the condenser, condensed and dropped to the water separator for stratification. Reflux toluene into the system again; keep the temperature at about 190°C, and when the collected water is close to the theoretical value (9g), continue to reflu...

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Abstract

The invention discloses a high thermal-stability capped sulfone polymer, a preparation method and an application in tableware thereof, and belongs to the technical field of special engineering plastics and tableware manufacturing. Dimethyl carbonate is used as a capping agent, a melt flow rate of the prepared sulfone polymer is 10-100 g/10 min, the transparency is greater than or equal to 82%, andthe polymer has excellent high temperature resistance and mildew resistance, and is particularly suitable for preparing sanitary tableware. The preparation method is simple in process, compared withthe prior art, a methyl chloride gas is added, and thereby a reaction degree is more thorough. The invention discloses a chopstick made of the sulfone polymer, and use defects such as being easy to generate bacteria, volatilizing toxic substances, and scalding existing in chopsticks prepared by materials such as bamboo chopsticks, plastic melamine chopsticks and stainless steel chopsticks are overcome. The invention also provides a production process of the chopstick, and the production process is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of manufacturing special engineering plastics and tableware, and relates to a highly thermally stable capped sulfone polymer, a preparation method and its application on tableware. Background technique [0002] Sulfone polymer is a special high-temperature-resistant transparent thermoplastic engineering plastic with outstanding thermal properties, excellent chemical resistance, excellent high-temperature creep resistance, excellent dimensional stability, extremely low smoke and toxic gas emissions, and superior durability Hot water and superheated steam, good electrical properties, mainly include three types of polysulfone (PSU), polyethersulfone (PES) and polyphenylsulfone (PPSU). [0003] The key factor to evaluate these properties is the stability of molecular weight, because the processing temperature of high-temperature resistant plastics is usually as high as 300 ° C, especially for sulfone polymers, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23C08G75/20A47G19/00A47G21/00
CPCA47G19/00A47G21/00C08G75/20C08G75/23
Inventor 江林峰李春亚李太菲丁玉堂杨伟
Owner 江西金海新能源科技有限公司
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