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Preparation method of polycarbonate high-temperature-resistant degradation agent and polycarbonate composition

A polycarbonate, high temperature resistant technology, applied in the field of polycarbonate compositions, polycarbonate high temperature degradation agents, and preparation fields, can solve the problems of increasing production costs, poor high temperature degradation resistance of antioxidants, etc., and achieves easy operation. , The effect of post-processing purification is convenient and efficient

Pending Publication Date: 2022-05-20
WANHUA CHEM GRP CO LTD
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Problems solved by technology

In order to improve the effect of high temperature degradation resistance, some scholars have tried to add different antioxidants at the same time to expect synergistic effects, such as the literature "Research on Anti-yellowing Performance of Polycarbonate Processing" (Application of Engineering Plastics, Qian Jing, Wu Chao, 2015 ,41(9):115-118) reported that the combination of phosphite antioxidant 627A and titanium dioxide R–TC30 significantly improved the degradation resistance of polycarbonate under high temperature conditions, but the dosage was 2000ppm ; The literature "Effect of Phosphite Antioxidants on Polycarbonate Damp-heat Aging" (Fine and Specialty Chemicals, Bi Jingli, Zhang Chao, Zhang Qin, etc., 2020,28(8):44-46) reported different types, The influence of different amounts of phosphite antioxidants on the molecular weight and melt mass flow rate of polycarbonate after hygrothermal aging can significantly improve the resistance to high temperature degradation of polycarbonate, but the amount of antioxidants described in the literature is as high as 3000ppm
The addition of a high amount of antioxidants shows that the existing antioxidants have poor resistance to high temperature degradation, which undoubtedly greatly increases the production cost. Therefore, in order to meet the high requirements of downstream applications for the degradation resistance of polycarbonate under high temperature conditions, the development of A new anti-degradation agent with stronger anti-degradation ability, especially in the high-temperature extrusion stage, to improve the use efficiency has become an urgent problem for polycarbonate manufacturers to solve

Method used

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  • Preparation method of polycarbonate high-temperature-resistant degradation agent and polycarbonate composition
  • Preparation method of polycarbonate high-temperature-resistant degradation agent and polycarbonate composition
  • Preparation method of polycarbonate high-temperature-resistant degradation agent and polycarbonate composition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Acetonitrile (40ml) and phenyl isothiocyanate (2.70g, 20mmol) are added successively in the reactor that thermometer and reflux condenser are housed, one-shot adds indium trichloride (8.85g, 40mmol) in the reactor, will The temperature of the reaction system was raised to 80°C, the boiling point of acetonitrile, and refluxed. After the indium trichloride was completely dissolved, the reaction was refluxed for another 4 hours. The filtrate was obtained by filtration, and the solvent in the filtrate was evaporated by a rotary evaporator to obtain a crude product. The obtained crude product was recrystallized with ethyl acetate, and the white solid was filtered out with suction to obtain 2.62 g of polycarbonate anti-high temperature degradation agent A, with a yield of 97%. The reaction formula is as follows:

[0040]

[0041] 1 H NMR (CDCl 3,500MHz): δ9.23(s,1H),7.53-7.57(m,2H),8.23-8.33(m,1H),8.09-8.13(m,1H).

[0042] Then, take 12kg of polycarbonate powder and 0.1...

Embodiment 2

[0045] Toluene (40ml) and p-methylphenylisothiocyanate (2.98g, 20mmol) were added successively in the reactor equipped with a thermometer and a reflux condenser, and indium trichloride (6.64g, 30mmol) was added to the reactor at one time. ), the temperature of the reaction system was raised to 110°C, the boiling point of toluene, and refluxed. After the indium trichloride was completely dissolved, the reaction was refluxed for 4 hours, and the filtrate was filtered, and the solvent in the filtrate was evaporated by a rotary evaporator to obtain a crude product. The obtained crude product was recrystallized with ethyl acetate, and the white solid was filtered out with suction to obtain 2.80 g of polycarbonate anti-high temperature degradation agent B with a yield of 94%. The reaction formula is as follows:

[0046]

[0047] 1 H NMR (CDCl 3 ,500MHz): δ9.11(s,1H),7.89-8.02(m,1H),7.79(s,1H),7.21-7.35(s,1H),2.52(s,3H).

[0048] Then, take 12kg polycarbonate powder and 0.12g p...

Embodiment 3

[0050] Chlorobenzene (40ml) and o-methyl phenylisothiocyanate (2.98g, 20mmol) are added successively in the reactor that thermometer and reflux condenser are housed, one-time adds indium trichloride (4.43g, 20mmol), the temperature of the reaction system was raised to 132°C, the boiling point of chlorobenzene, and refluxed. After the indium trichloride was completely dissolved, the reaction was refluxed for 3.5h, and the filtrate was filtered, and the solvent in the filtrate was evaporated by a rotary evaporator to obtain a crude product. The obtained crude product was recrystallized with ethyl acetate, and the white solid was filtered out with suction to obtain 2.68 g of polycarbonate anti-high temperature degradation agent C, with a yield of 90%. The reaction formula is as follows:

[0051]

[0052] 1 H NMR (CDCl 3 ,500MHz): δ9.17(s,1H),7.78-7.87(m,1H),7.30-7.47(m,1H),7.01-7.16(m,1H),2.02(s,3H).

[0053] Then, take 12kg polycarbonate powder, 0.12g polycarbonate anti-hi...

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Abstract

The invention provides a preparation method of a polycarbonate high-temperature-resistant degradation agent and a polycarbonate composition, the structural general formula of the polycarbonate high-temperature-resistant degradation agent prepared by adopting an indium catalyst is shown in the specification, the preparation method is simple and convenient to operate, the product is easy to purify and high in yield, and introduction of impurities into the polycarbonate composition can be avoided; the substance has good high-temperature degradation resistance in an air atmosphere and under a high-temperature condition, and the production cost of the polycarbonate composition can be saved.

Description

technical field [0001] The invention relates to a polycarbonate anti-high temperature degradation agent, in particular to a polycarbonate anti-high temperature degradation agent, a preparation method and a polycarbonate composition, belonging to the technical field of new chemical materials. Background technique [0002] Polycarbonate (referred to as PC) is a high molecular polymer containing carbonate groups in the molecular chain. It has outstanding impact resistance, creep resistance, high tensile strength, strong heat resistance and cold resistance. With many advantages such as excellent dielectric properties and good light transmission properties, it has become the fastest-growing general-purpose engineering plastic among the five major engineering plastics, and has a very wide range of applications in optics, sheet metal, auto parts, bullet-proof glass, and electrical and electronic fields. . [0003] However, in the downstream application of polycarbonate, it is ofte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/62C07D277/84C07D513/04C08K5/47C08L69/00
CPCC07D277/62C07D277/84C07D513/04C08K5/47C08L2201/08C08L69/00
Inventor 孙永旭徐丹王磊耿瑞森刘彤彤张宏科
Owner WANHUA CHEM GRP CO LTD
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