Polycarbonate resin, polycarbonate resin composition and molded article

A technology of polycarbonate resin and composition, applied in polycarbonate resin composition and molded product, polycarbonate resin field, can solve the problems of low melt tension, opaque molded product, unable to obtain molded product, etc., achieve melt tension The effect of improving and excellent dripping resistance

Active Publication Date: 2015-07-29
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this polycarbonate resin has the following disadvantages: when it is used for blow molding, extrusion molding, vacuum molding, etc., the melt tension is generally low, so that the thickness of the molded product is uneven, or it hangs (drawdown). Satisfactory molded products cannot be obtained
[0003] On the other hand, it is known to use polytetrafluoroethylene (PTFE) with fibril-forming ability in order to suppress dripping and impart flame retardancy, but the compatibility of PTFE and polycarbonate resin is poor, which causes opacity of molded products

Method used

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  • Polycarbonate resin, polycarbonate resin composition and molded article
  • Polycarbonate resin, polycarbonate resin composition and molded article
  • Polycarbonate resin, polycarbonate resin composition and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0175] (1) Polycarbonate oligomer synthesis process (linear oligomer)

[0176] Add 2,000 ppm by mass of sodium dithionite to a 5.6% by mass sodium hydroxide aqueous solution relative to bisphenol A (hereinafter sometimes abbreviated as BPA) dissolved thereafter, and dissolve bisphenol A therein so that the bisphenol A concentration becomes 13.5 mass %, prepare the sodium hydroxide aqueous solution of bisphenol A.

[0177] 40 L / hour of sodium hydroxide aqueous solution of bisphenol A, 15 L / hour of dichloromethane and 4.0 kg / hour of phosgene were continuously passed into a tubular reactor with an inner diameter of 6 mm and a tube length of 30 m. The tubular reactor has a jacket portion, and cooling water is passed through the jacket to keep the temperature of the reaction liquid below 40°C.

[0178] The reaction liquid flowing out of the tubular reactor was continuously introduced into a baffled tank reactor with an internal volume of 40 L equipped with a wiper (sweptback wing)...

Embodiment 2～15 and comparative example 3～10

[0198] The kind of branching agent, the amount of branching, and the amount of PTBP in Example 1 were changed according to Table 1, and implemented in the same way as Example 1 except that.

[0199] Table 1 shows the viscosity-average molecular weight, branching agent content, melt tension, and melt fluidity of the obtained polycarbonate resin by the above-mentioned method. In addition, in figure 1 The relationship between the melt tension and the melt fluidity (MT)×(1 / MVR) is shown in .

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Abstract

A polycarbonate resin wherein a relation between the melt tension [MT (g)] at 280°C and melt volume rate [MVR (cm3/10 min)] at 280°C satisfies the requirements represented by formulae (1) to (3), and a polycarbonate resin composition and a molded article containing the same. Formula (1): MT≥(15.4/MVR)-1.3 Formula (2): MT≤(57.4/MVR)-1.3 Formula (3): MT≥1

Description

technical field [0001] The present invention relates to a polycarbonate resin, a polycarbonate resin composition, and a molded article. Since the polycarbonate resin maintains molding fluidity in a high-shear region, has an improved melt tension, and is excellent in droplet resistance, it does not require Additives such as PTFE can cause opacity. Background technique [0002] In general, polycarbonate resins produced from bisphenol A and the like are used in a wide range of applications because they are excellent in transparency, heat resistance, and mechanical properties. However, this polycarbonate resin has the following disadvantages: when it is used for blow molding, extrusion molding, vacuum molding, etc., the melt tension is generally low, so that the thickness of the molded product is uneven, or it hangs (drawdown). Satisfactory molded products could not be obtained. [0003] On the other hand, it is known to use polytetrafluoroethylene (PTFE) capable of forming fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/00C08L69/00
CPCC08G64/14
Inventor 大和田贵纪菅浩一中山由美
Owner IDEMITSU KOSAN CO LTD
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