Copolymerized polycarbonate and preparation method thereof

A technology of polycarbonate and copolymerization, which is applied in the field of copolycarbonate and its preparation, can solve the problems of the comprehensive use performance of materials, poor moisture and heat aging resistance, and influence on the mechanical properties of materials, and achieve good industrial application prospects and easy steps Operation, the effect of improving intrinsic flame retardancy

Active Publication Date: 2022-02-01
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polycarbonates and their blends with vinyl polymers are not inherently non-flammable, and conventional PCs still have relatively poor moisture and heat aging resistance, poor solvent resistance, and are prone to stress cracking after contact with solvents. Defects such as poor impact performance at low temperature limit the application in low temperature places, etc.
[0003] Patent CN112898553A discloses an intrinsically flame-retardant copolymerized PC and its preparation method. Bisphenol S and siloxane segments are introduced into the conventional PC molecular chain to improve the intrinsic flame-retardant performance of PC, and its flame-retardant energy level is the highest. Reach UL94V0 (3mm), but the low-temperature impact resistance and chemical resistance of the material need to be further improved; CN105849171B discloses the method for preparing low-smog and low-exothermic train interior components, and the polymerized end synthesizes the branched PC of cyanophenol endcapping , Tetrabromobisphenol A copolymerized PC, siloxane PC, blending it with conventional PC and flame retardants and other additives in a certain proportion, blending will lead to the precipitation of flame retardants and affect the mechanical properties of the material , that is, the comprehensive performance of the material will be affected

Method used

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  • Copolymerized polycarbonate and preparation method thereof
  • Copolymerized polycarbonate and preparation method thereof
  • Copolymerized polycarbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Add 2280g of bisphenol A (BPA), 1000g of sodium hydroxide, 47g of p-cyanophenol, 12.8g of 1,1,1-tris-(4-hydroxyphenyl)ethane (THPE) into a nitrogen-protected mixer , 7200g of water, mixed evenly; after completely dissolving, add 12.9g of catalyst tetrabutylammonium bromide, form sodium phenate salt phase;

[0075] In another mixer, add 1139g liquid phosgene and 22770g dichloromethane (MC), and mix the two evenly to form a phosgene solution with a mass concentration of 4.76%; get another mixer and add 640g LNBR-2 and 2562g dichloromethane Chloromethane, and the two are mixed uniformly to form a carboxyl-terminated polybutadiene acrylonitrile solution with a mass concentration of 20%, as a comonomer solution;

[0076] Subsequently, put the sodium phenolate salt phase into the polymerization reactor, add the prepared phosgene solution and the comonomer solution into the polymerization reactor respectively at a stirring rate of 550 rpm, and at the same time, dropwise add th...

Embodiment 2-14 and comparative example 1-3

[0078] Copolycarbonate was prepared in the same manner as in Example 1, except that the amount of feed was changed (as shown in Table 1). Wherein, each embodiment and comparative example have the addition of liquid phosgene, carboxyl-terminated polybutadiene acrylonitrile, and eugenol-terminated PDMS monomers, and then keep the mass concentrations of their prepared solutions at 4.76%, 20%, and 20% respectively .

[0079] Table 2, embodiment and comparative example feeding parameters

[0080]

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Abstract

The invention discloses copolymerized polycarbonate and a preparation method thereof. The copolymerized polycarbonate comprises a polycarbonate chain segment, a polybutadiene acrylonitrile chain segment, a polysiloxane chain segment, a branched group obtained by reacting with a branching agent, and a cyanophenyl end-capping group obtained by reacting with an end-capping agent. The copolymerized polycarbonate is excellent in intrinsic flame retardant and has good chemical resistance and low-temperature impact resistance.

Description

technical field [0001] The invention relates to a copolycarbonate, in particular to a copolycarbonate and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a linear thermoplastic resin derived from bisphenols and phosgene or their derivatives. Polycarbonate has many desirable properties such as light transmittance, good impact strength, and high heat distortion temperature, etc., and has a wide range of applications in the fields of automobiles, electronic equipment, construction, computers, and aerospace. However, polycarbonates and their blends with vinyl polymers are not inherently non-flammable, and conventional PCs still have relatively poor moisture and heat aging resistance, poor solvent resistance, and are prone to stress cracking after contact with solvents. Defects such as poor impact performance at low temperature limit the application in low temperature places. [0003] Patent CN112898553A discloses an intrinsically flame-retarda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/24C08G64/18
CPCC08G64/24C08G64/186C08G64/18
Inventor 魏志涛曾伟王磊黎源黎雷张珏李凤闯
Owner WANHUA CHEM GRP CO LTD
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