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Polycarbonate-polyorganosiloxane copolymer, process for production of the copolymer, and polycarbonate resin containing the copolymer

A technology of polyorganosiloxane and polycarbonate, applied in the field of polycarbonate resin, can solve problems such as easy yellowing, and achieve the effect of excellent thermal stability

Active Publication Date: 2012-08-29
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, PC-PDMS copolymer has the problem that it is more prone to yellowing than general polycarbonate when molded at high temperature
There is no understanding of the yellowing characteristic of this PC-PDMS copolymer and its improvement

Method used

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  • Polycarbonate-polyorganosiloxane copolymer, process for production of the copolymer, and polycarbonate resin containing the copolymer
  • Polycarbonate-polyorganosiloxane copolymer, process for production of the copolymer, and polycarbonate resin containing the copolymer
  • Polycarbonate-polyorganosiloxane copolymer, process for production of the copolymer, and polycarbonate resin containing the copolymer

Examples

Experimental program
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Effect test

Embodiment

[0124] The present invention will be described in more detail by way of examples, but the present invention is by no means limited by these examples.

Synthetic example 1

[0126] 1483 g of octamethylcyclotetrasiloxane, 30.0 g of 1,1,3,3-tetramethyldisiloxane, and 35 g of 86% by mass sulfuric acid were mixed, and stirred at room temperature for 17 hours. Separate the oil phase, add 25g of sodium bicarbonate, and stir for 1 hour to neutralize. After filtration, vacuum distillation was performed at 150° C. and 400 Pa to distill off volatile components mainly composed of low-molecular-weight polyorganosiloxane.

[0127] To a mixture of 59 g of 2-allylphenol and 0.0014 g of platinum as a platinum chloride-alkoxide complex, 294 g of the oil obtained above was added at a temperature of 90°C. The mixture was stirred for 3 hours while maintaining the temperature at 90°C to 115°C.

[0128] The product was dissolved in 10 L of dichloromethane, washed twice with 1.5 L of 0.3 mol / L NaOH aqueous solution, washed with 1.5 L of 2% by mass phosphoric acid for neutralization, and washed once with water. Concentrate and distill off dichloromethane under reduced ...

Synthetic example 2

[0131] It was the same as Synthesis Example 1 except that the number of times of washing with 0.3 mol / L NaOH aqueous solution was 3 times.

[0132] The repeating number of dimethylsiloxy units in the obtained 2-allylphenol-modified PDMS was 90, and the amount of 2-allylphenol in the 2-allylphenol-modified PDMS was less than 100 mass ppm.

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Abstract

A polycarbonate-polyorganosiloxane copolymer (A-1) comprising a polycarbonate block composed of a specific constituent unit and a polyorganosiloxane block composed of a specific constituent unit, wherein the copolymer is characterized in that (1) the content of the polyorganosiloxane block moiety is 1 to 30 mass%, (2) the average repeating unit number of constituent units represented by general formula (II) is 70 to 1000, (3) the copolymer has a viscosity average molecular weight of 13000 to 26000, and (4) the content of a phenol residue having an allyl group in the copolymer is 400 ppm by mass or less.

Description

technical field [0001] The present invention relates to a polycarbonate-polyorganosiloxane copolymer, a method for producing the same, and a polycarbonate resin containing the copolymer. Specifically, it relates to a polycarbonate-polyorganosiloxane copolymer capable of providing a molded product having excellent thermal stability and color tone even in high-temperature molding, a method for producing the same, and a polycarbonate resin containing the copolymer. Background technique [0002] Polycarbonate resins made of bisphenol A and the like have excellent heat resistance and mechanical properties, and are therefore used as materials for various parts in the electrical and electronic fields, automobiles, and other fields. However, depending on the application, flame retardancy and impact resistance which cannot be satisfied by the polycarbonate resin composed of bisphenol A may be required. [0003] On the other hand, polycarbonate-polydimethylsiloxane copolymer (PC-PDMS...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/18C08G64/20C08L69/00
CPCC08G64/186C08G77/448C08G64/18C08G64/20C08L69/00C08L83/10
Inventor 石川康弘
Owner IDEMITSU KOSAN CO LTD
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