Copolycarbonate and preparation method thereof

A technology of copolycarbonate and comonomer, applied in the field of new copolymer and its preparation, copolycarbonate and its preparation, can solve the problem of poor alloy compatibility, narrowing the application scope of polycarbonate materials, affecting material properties, etc. problems, to achieve the effect of improving the resistance to humidity and heat aging, facilitating the realization of industrialization, and broadening the application field.

Active Publication Date: 2021-02-26
WANHUA CHEM (SICHUAN) CO LTD +1
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Problems solved by technology

However, the oxazoline group used in this case is a toxic organic substance, which is not conducive to the environment and health, and reduces the application range of polycarbonate materials
Chinese patent CN109280355A discloses a PC / ABS blend material with hydrolysis resistance, high CTI, and high flame retardancy. Additives are used to improve the hydrolysis resistance of PC / ABS, but the carbodiamine used is slightly alkaline, which may cause a certain degree of degradation of PC during the melt blending process
CN 201911392117.8 discloses a polycarbonate styrenic resin alloy resistant to damp heat aging and its preparation method. The damp heat resistant modifier used in the paper is hydrophobic fumed silica whose surface has been organically treated. Poor compatibility with styrene-based resin alloys can easily lead to phase separation, which in turn affects the performance of the material

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  • Copolycarbonate and preparation method thereof
  • Copolycarbonate and preparation method thereof
  • Copolycarbonate and preparation method thereof

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preparation example Construction

[0053] (1)

[0054] Refer to the synthetic method in the published literature {Wu Meng, Qi Shicheng, Wang Kaiwen, Zhang Liqun, & Yue Dongmei. (2015). Preparation and application of hydroxyl-terminated liquid fluorine 26 rubber. Rubber Science and Technology, 13(012), 10-15.} preparation;

[0055] The structural data of the hydroxyl-terminated liquid Fluoro-26 rubber is listed in Table 1 below,

[0056] Table 1: Structural data of hydroxyl-terminated liquid Fluoro-26 rubber

[0057] Numbering m n F-1 15 48 F-2 95 16 F-3 51 30

[0058] (2)

[0059] Octamethylcyclotetrasiloxane (1420 g, 4.80 mol), tetramethyldisiloxane (40.2 g, 0.3 mol) and clay catalyst Filtrol 20 (23.4 g, 1.6 wt %) were added to a mixer equipped with Thermometer and stirred for 40 minutes to make the material mixture uniform, then the reaction system was heated up to 50°C at a rate of 5°C / min and stirred at this temperature for 3 hours, then the temperature of the reaction s...

Embodiment 1

[0061] Add 342.5g of bisphenol A, 132g of sodium hydroxide, 810g of water, 6.08g of p-tert-butylphenol into a mixer protected by nitrogen, and add 0.48g of catalyst tetrabutylammonium bromide after complete dissolution to form sodium phenolate salt Mutually;

[0062] In another mixer, add 163.2g liquid phosgene and 1631.9g dichloromethane, and mix the two evenly; take another mixer, and prepare 20.3g of hydroxyl-terminated liquid fluorine 26 rubber (numbering F- 1) mix homogeneously with 81g dichloromethane;

[0063] Then put the sodium phenolate salt phase into the polymerization reactor, and then add the prepared phosgene solution and the hydroxyl-terminated liquid fluorine 26 rubber solution into the polymerization reactor at a stirring rate of 550rpm, and add dropwise to the reaction system at the same time The sodium hydroxide aqueous solution with a concentration of 32% by weight keeps the pH value of the reaction system at about 11.4, and maintains the temperature of t...

Embodiment 2

[0066] Add 456.6g of bisphenol A, 200g of sodium hydroxide, 1440g of water, and 5.70g of p-tert-butylphenol into a mixer protected by nitrogen. After completely dissolving, add 2.58g of catalyst tetrabutylammonium bromide to form phenol Sodium brine phase;

[0067] In another mixer, add 237.4g liquid phosgene and 4747.2g dichloromethane, and mix the two evenly; take another mixer, and put the hydroxyl-terminated liquid fluorine 26 rubber (number F- 1) mix homogeneously with 243.0g dichloromethane;

[0068] Then put the sodium phenolate salt phase into the polymerization reactor, and then add the prepared phosgene solution and the hydroxyl-terminated liquid fluorine 26 rubber solution into the polymerization reactor at a stirring rate of 650rpm, and add dropwise to the reaction system at the same time The sodium hydroxide aqueous solution with a concentration of 32% by weight keeps the pH value of the reaction system at about 11.7, and maintains the temperature of the reaction...

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Abstract

The invention relates to a copolycarbonate and a preparation method thereof. The invention particularly relates to a novel copolymer of which the molecular chain contains a fluororubber chain segment,a polysiloxane chain segment and a polycarbonate chain segment, and a preparation method thereof. The copolymer is novel in structure, and the fluororubber chain segment and the polysiloxane chain segment are introduced into the polycarbonate chain segment in a copolymerization manner so that the damp-heat aging resistance, the solvent resistance and the impact resistance of conventional polycarbonate can be improved. The copolymer is prepared by copolycondensation of the comonomer and the polycarbonate oligomer under the action of the catalyst, is easy to operate and easy to implement, and can be used in industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a copolycarbonate and a preparation method thereof. It specifically relates to a novel copolymer of fluorine-containing rubber segment and polycarbonate segment in the molecular chain and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a high molecular polymer containing carbonate bonds in the molecular chain, which can be divided into aliphatic, alicyclic, aliphatic-aromatic and aromatic polycarbonate, among which aromatic polycarbonate has excellent Excellent mechanical properties, heat resistance, impact toughness, electrical insulation and light transmission, creep resistance and low water absorption, good dimensional stability, excellent dielectric properties, etc., can be used as a thermoplastic engineering plastic, widely used in Automotive, electronic equipment, construction, office supplies, optical discs, sports equipment, heal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/18C08G64/24C08G77/448C08G77/442
CPCC08G64/186C08G64/24C08G77/448C08G77/442
Inventor 魏志涛王磊曾伟王玉彬黎雷李凤闯隋东武李强张怀强
Owner WANHUA CHEM (SICHUAN) CO LTD
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