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Polysiloxane-polycarbonate copolymer, method for producing polysiloxane-polycarbonate copolymer, and polycarbonate resin

A technology of polycarbonate resin and polycarbonate, applied in the field of polycarbonate resin, can solve the problems of poor removal effect of small molecule cyclic siloxane, small space of electronic equipment, rising internal temperature, etc., and achieve good appearance The effect of color tone, high heat-resistant deformation temperature, and good heat-resistant deformation performance

Active Publication Date: 2021-08-03
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application CN110776640A removes part of the cyclic siloxane by high-temperature rectification of polysiloxane, but as the degree of polymerization of cyclic siloxane increases, its boiling point becomes higher and higher, resulting in small molecule cyclic silicon Poor removal of oxane
[0005] In the actual application process of polysiloxane-polycarbonate copolymer, for example, in the application scene of electronic equipment, the middle frame and bracket of the equipment need to have a certain low temperature resistance, but at the same time, the internal space of the electronic equipment is small, and a large number of The heat of the components when they are working will increase the internal temperature, resulting in heat-resistant deformation.

Method used

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  • Polysiloxane-polycarbonate copolymer, method for producing polysiloxane-polycarbonate copolymer, and polycarbonate resin
  • Polysiloxane-polycarbonate copolymer, method for producing polysiloxane-polycarbonate copolymer, and polycarbonate resin
  • Polysiloxane-polycarbonate copolymer, method for producing polysiloxane-polycarbonate copolymer, and polycarbonate resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Embodiment 1 polydimethylsiloxane PDMS-A is synthesized

[0095] Mix and stir 1483g of octamethylcyclotetrasiloxane, 30g of 1,1,3,3-tetramethyldisiloxane and 35g of 86% concentrated sulfuric acid at room temperature for 10h, separate and remove the water phase, and add 25g of sodium bicarbonate, mixed and stirred for 1 hour, filtered to remove solids, vacuum distilled at 160°C and 600Pa to remove low-molecular-weight polyorganosiloxane, and the content of octamethylcyclotetrasiloxane was tested to be 10576ppm. The product after vacuum distillation is passed into a polystyrene resin with a length of 2 meters, a diameter of 10 cm and an average pore diameter of 25 nm at a speed of 10 g / min. The content of octamethylcyclotetrasiloxane in the test effluent is 1568 ppm .

[0096] 72.2g of eugenol and 0.0014g of platinum chloride-alkoxide complex were mixed and added to 294g of the above-mentioned adsorbed product, and reacted at 100°C for 5h. The product was dissolved in 1...

Embodiment 2

[0097] Example 2 Polydimethylsiloxane PDMS-B Synthesis

[0098] According to the method in Example 1, the distillation conditions are set to 160°C and 400Pa, and the content of octamethylcyclotetrasiloxane detected before adsorption by polystyrene resin is 8433ppm, and after adsorption is 1263ppm, the final product eugenol- The degree of polymerization of polydimethylsiloxane is 47, and the content of octamethylcyclotetrasiloxane is 1215ppm.

Embodiment 3

[0099] Example 3 Synthesis of polydimethylsiloxane PDMS-C

[0100] According to the method in Example 1, the distillation conditions were set to 160°C and 200Pa, and the content of octamethylcyclotetrasiloxane was detected to be 7643ppm before adsorption by polystyrene resin, and 1146ppm after adsorption. The final product eugenol-poly The degree of polymerization of dimethylsiloxane is 51, and the content of octamethylcyclotetrasiloxane is 1015ppm.

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Abstract

The present invention relates to a polysiloxane-polycarbonate copolymer, a method for producing the polysiloxane-polycarbonate copolymer, and a polycarbonate resin, the main chain of the polysiloxane-polycarbonate copolymer comprising a structural unit represented by formula (I) and a structural unit represented by formula (II), and the olysiloxane-polycarbonate copolymer characterized in that the content of cyclic siloxane in the copolymer is 500 ppm or less. According to the present invention, the polysiloxane-polycarbonate copolymer and the polycarbonate resin containing the polysiloxane-polycarbonate copolymer have characteristics of good thermal deformation temperature and good appearance tone.

Description

technical field [0001] The invention relates to a polycarbonate copolymer, in particular to a polysiloxane-polycarbonate copolymer, a manufacturing method thereof and a polycarbonate resin containing the copolymer. Background technique [0002] Polycarbonate is an engineering plastic with excellent performance, which has excellent toughness, light transmittance, and strength, and is widely used in machinery, electronics, automobiles, construction, electrical appliances and other related fields. However, for some special application scenarios, conventional polycarbonate still has performance limitations. For example, in a low temperature environment, polycarbonate will change from a strong and tough plastic to a hard and brittle material, which cannot Meet the impact resistance requirements under low temperature conditions. [0003] Researchers try to improve the low-temperature resistance performance of polycarbonate materials by modifying them, such as improving the low-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/18C08G64/24C08L69/00
CPCC08G64/186C08G64/24C08L69/00C08L2205/025
Inventor 李凤闯王磊曾伟王玉彬魏志涛黎雷宋延方杨洋陈永
Owner WANHUA CHEM GRP CO LTD
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