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Polycarbonate-polyorganosiloxane copolymer and method for producing same

A polyorganosiloxane and polycarbonate technology, which is applied in the field of polycarbonate-polyorganosiloxane copolymers, can solve the problem that transparency is not sufficient, impact resistance is decreased, and it is difficult to be transparent and impact resistance. Impact resistance, etc.

Active Publication Date: 2015-11-04
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a problem that impact resistance decreases
[0006] In addition, in Patent Document 6, an attempt was made to improve transparency while maintaining excellent impact resistance by blending two types of polycarbonate-polyorganosiloxane copolymers having different light transmittances, but the transparency cannot be said to be sufficient.
It can be seen that it is difficult for the polycarbonate-polyorganosiloxane copolymers to achieve both excellent transparency and excellent impact resistance, especially impact resistance at low temperatures.

Method used

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  • Polycarbonate-polyorganosiloxane copolymer and method for producing same
  • Polycarbonate-polyorganosiloxane copolymer and method for producing same
  • Polycarbonate-polyorganosiloxane copolymer and method for producing same

Examples

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Embodiment

[0144] Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to these examples. In addition, the characteristic value and evaluation result in each example were calculated|required based on the following points.

[0145] (1) Gel Permeation Chromatography (GPC)

[0146] GPC measurement of polyorganosiloxane was carried out under the following conditions.

[0147] Test equipment: TOSOH HLC 8220

[0148] Measuring conditions: TOSOH TSK-GEL GHXL-L, G4000HXL, G2000HXL

[0149] Solvent: Tetrahydrofuran (THF)

[0150] Column temperature: 40°C

[0151] Flow rate: 1.0ml / min

[0152] Detector: RI

[0153] Injection concentration: 0.2w / v%

[0154] Injection volume: 0.1ml

[0155] Standard polystyrene manufactured by Tosoh Corporation was used for preparation of the calibration curve.

[0156] In addition, the molecular weight distribution measurement of the polyorganosiloxane in polycarbonate-polydimethylsilo...

manufacture example

[0165] 2000 ppm of sodium dithionite was added to the 5.6 mass % sodium hydroxide aqueous solution with respect to bisphenol A (BPA) (dissolved later). BPA was dissolved therein so that the concentration of BPA became 13.5% by mass, and a sodium hydroxide aqueous solution of BPA was prepared. The sodium hydroxide aqueous solution of BPA is continuously passed into the tube type with an inner diameter of 6mm and a tube length of 30m at a flow rate of 40L / hr, dichloromethane at a flow rate of 15L / hr, and carbonyl chloride at a flow rate of 4.0kg / hr. reactor. The tubular reactor has a jacket part, and cooling water is passed through the jacket to keep the temperature of the reaction solution below 40°C. The reaction solution flowing out of the tubular reactor is continuously introduced into a tank reactor with baffles of 40L internal volume of the swept wing, wherein further adding an aqueous sodium hydroxide solution of BPA at a flow rate of 2.8L / hr, at a rate of 0.07 A 25 mas...

Embodiment 1

[0168] Add 15L of polycarbonate oligomer solution, 8.3L of dichloromethane produced as above in the 50L tank reactor equipped with baffle plate, paddle type stirring blade and cooling jacket, meet [average chain length n= 75. The log(M) at which dw / dlog(M) reaches the maximum value is 3.8, and the value obtained by integrating the dw / dlog(M) value in the range of log(M) 4.0 to 4.5 is relative to the value obtained in log(M) ) in the entire range of the dw / dlog (M) value is integrated (hereinafter, sometimes referred to as the ratio of log (M) 4.0 to 4.5 in the embodiments) 24.4% (average chain length n=34, dw / dlog (M) reaches the maximum log (M) is 3.6, the ratio of log (M) 4.0~4.5 is 5.4% allyl phenol terminal modified PDMS and average chain length n=92, dw / dlog (M ) reached the maximum value of log (M) 4.1, log (M) 4.0 ~ 4.5 ratio of 34.5% allyl phenol end-modified PDMS with a mass ratio of 3:7)] allyl 393 g of phenol-terminal-modified polydimethylsiloxane (PDMS) and 5.8 m...

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Abstract

A polycarbonate-polyorganosiloxane copolymer comprising a specific polycarbonate block unit (A) and a specific polyorganosiloxane block unit (B), wherein in a differential molecular-weight distribution curve obtained by measurements using gel permeation chromatography with polystyrene of the polyorganosiloxane block unit (B) as a conversion basis, the horizontal axis of the distribution curve being the logarithmic value log(M) of molecular weight M and the vertical axis thereof being dw / dlog(M) which is the concentration fraction w differentiated by the logarithmic value log(M) of molecular weight, (1) the value of dw / dlog(M) is the greatest in a range of 3.4≤log(M)≤4.0, and (2) in the differential molecular-weight distribution curve, an integrated value of the dw / dlog(M) value in a range of 4.0≤log(M)≤4.5 is 6 to 40% with respect to an integrated value of the dw / dlog(M) value in the entire range of log (M).

Description

technical field [0001] The present invention relates to a polycarbonate-polyorganosiloxane copolymer having excellent transparency and low-temperature impact resistance and a method for producing the same. Background technique [0002] Polycarbonate-polyorganosiloxane polymers (hereinafter sometimes simply referred to as "PC-POS") have attracted attention due to their excellent properties such as high impact resistance, chemical resistance, and flame retardancy. Therefore, it is expected to be widely used in various fields such as the electric-electronic equipment field and the automobile field. In particular, it can be widely used in casings of mobile phones, mobile PCs, digital cameras, video cameras, power tools, etc., and other daily necessities. [0003] Generally, as a representative polycarbonate, a homopolycarbonate using 2,2-bis(4-hydroxyphenyl)propane [common name: bisphenol A] as a raw material dihydric phenol is generally used. . In order to improve physical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G64/18C08G77/38
CPCC08G77/448C08G64/186C08G81/00C08G77/04
Inventor 山田亚起
Owner IDEMITSU KOSAN CO LTD
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