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Polysiloxane block specific end-capped copolycarbonate and preparation method thereof

A technology of polysiloxane block and copolycarbonate is applied in the field of preparing the specific end-capped copolycarbonate, which can solve the problem of low mechanical properties of antibacterial polycarbonate plastics, no real antibacterial effect, polycarbonate The effect of promoting large-scale application, excellent mechanical properties, and simple and easy preparation method is achieved.

Inactive Publication Date: 2017-08-08
甘肃银光聚银化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dosage of the antibacterial agent of the antibacterial polycarbonate plastic is too complicated, the cost is too high, and the mechanical properties of the antibacterial polycarbonate plastic are not high
So far, the preparation of antibacterial polycarbonate plastics usually chooses to add antibacterial agents to polycarbonate. Now common antibacterial agents can be divided into inorganic powder antibacterial agents and organic liquid antibacterial agents. Among them, organic liquids are easy to decompose when exposed to high temperatures, but polycarbonate The processing temperature of ester is high, so the addition of organic liquid antibacterial agent does not really play an antibacterial effect; and inorganic powder antibacterial agent is difficult to disperse evenly in the resin during processing due to the high viscosity of polycarbonate resin and needs to be added to the carrier material , and these carrier materials will have a great impact on the mechanical properties of polycarbonate, and will also discolor polycarbonate

Method used

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  • Polysiloxane block specific end-capped copolycarbonate and preparation method thereof
  • Polysiloxane block specific end-capped copolycarbonate and preparation method thereof
  • Polysiloxane block specific end-capped copolycarbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0048] Add 228.3kg of bisphenol A, 100kg of sodium hydroxide, and 1600kg of water into the mixer and mix them. After bisphenol A is completely dissolved, add 324g of catalyst tetrabutylammonium bromide and stir until it is completely dissolved. Then add 2.4kg of tributylammonium bromide. Add 128.9kg of liquid phosgene and 4851L of dichloromethane to another mixer and mix evenly to form an oil phase; then put the sodium phenate salt phase into the polymerization reactor, and then The oil phase and 26.4kg of eugenol-terminated polysiloxane prepared in the preliminary examples were added to the polymerization reactor at a rate of 100g / min and 150g / min respectively under the stirring speed of 10% by weight of sodium hydroxide aqueous solution keeps the pH value of the reaction system at 10.5, and the temperature of the reaction system is maintained at 45° C.; after 2 hours of reaction, the reaction system is separated and purified and the organic solvent is removed to obtain the ra...

preparation Embodiment 2

[0050] Add 228.3kg of bisphenol A, 129kg of sodium hydroxide, and 1900kg of water into the mixer and mix them. After bisphenol A is completely dissolved, add 365g of catalyst tetrabutylammonium bromide and stir until it is completely dissolved. Then add 3.9kg of tributylammonium bromide. Chlorogene and stir evenly to form a water phase; add 130.5kg liquid phosgene and 5417L dichloromethane to another mixer, mix evenly to form an oil phase; The oil phase and 39.5kg of eugenol-terminated polysiloxane prepared in the preliminary examples were added to the polymerization reactor at a rate of 120g / min and 170g / min respectively under the stirring speed of 10% by weight of sodium hydroxide aqueous solution keeps the pH value of the reaction system at 10.9, and the temperature of the reaction system is maintained at 47° C.; after 2.5 hours of reaction, the reaction system is separated and purified and the organic solvent is removed to obtain the random copolymer of the present inventio...

preparation Embodiment 3

[0052] Add 228.3kg of bisphenol A, 145kg of sodium hydroxide, and 2100kg of water into the mixer and mix them. After bisphenol A is completely dissolved, add 400g of catalyst tetrabutylammonium bromide and stir until it is completely dissolved. Then add 3.9kg of tributylammonium bromide. Chlorogene and stir evenly to form a water phase; add 135.1kg liquid phosgene and 6118L dichloromethane to another mixer, mix evenly to form an oil phase; The oil phase and 51.2kg of eugenol-terminated polysiloxane prepared in the preliminary examples were added to the polymerization reactor at a rate of 150g / min and 180g / min respectively under the stirring speed of 10% by weight of sodium hydroxide aqueous solution keeps the pH value of the reaction system at 11.2, and the temperature of the reaction system is maintained at 50° C.; after 2.5 hours of reaction, the reaction system is separated and purified and the organic solvent is removed to obtain the random copolymer of the present inventio...

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Abstract

The invention discloses polysiloxane block specific end-capped copolycarbonate and a preparation method thereof. Random copolycarbonate consists of a polycarbonate block, a polysiloxane block and a specific end capping structure. As a proper amount of eugenol end-capped polysiloxane is introduced into a main chain, the specific end-capped copolycarbonate is high in mechanical property; meanwhile, by the adoption of triclosan for end capping, the specific end-capped copolycarbonate is excellent in antibacterial performance, has actual application value and can meet the demand of modern scientific development for material performance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polysiloxane block-specific end-capped copolycarbonate, and also relates to a method for preparing the specific end-block copolycarbonate. Background technique [0002] Polycarbonate (Polycarbonate, PC) is a general term for polymers containing carbonate groups in their molecular chains and various materials based on them. According to the structure of the ester group, it can be divided into aliphatic, alicyclic, aromatic, aliphatic-aromatic and other types. Among them, aliphatic polycarbonate has low melting point, high solubility, poor thermal stability and mechanical strength. However, it cannot be used as engineering plastics; alicyclic and aliphatic-aromatic polycarbonates cannot be widely used due to their excessive crystallization tendency, brittleness and low mechanical strength; from raw material cost, product performance Considering various aspe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/42C08G64/18C08G64/24C08G64/40C08G77/448
CPCC08G64/186C08G64/24C08G64/406C08G64/42C08G77/448
Inventor 葛建芳郑文亮温炳章甘贤伟
Owner 甘肃银光聚银化工有限公司
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