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Housing for portable electronic appliance

A kind of electronic equipment and portable technology, which is applied in the field of portable electronic equipment casing, can solve unknown problems, achieve the effects of thin-walled drop impact resistance, improved impact strength, excellent fluidity and heat resistance

Inactive Publication Date: 2015-12-02
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, there is no known polycarbonate resin composition for portable electronic device housings that can be thinned and has excellent drop impact resistance, fluidity, and heat resistance.

Method used

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  • Housing for portable electronic appliance
  • Housing for portable electronic appliance
  • Housing for portable electronic appliance

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0087] Manufacture of polycarbonate oligomers

[0088] Add 2,000 ppm of sodium dithionite to bisphenol A (BPA) to be dissolved later in a 5.6 mass % sodium hydroxide aqueous solution, dissolve BPA therein so that the BPA concentration becomes 13.5 mass %, and prepare a sodium hydroxide aqueous solution of BPA .

[0089] Under the flow rate of 40 liters / hour of sodium hydroxide aqueous solution of this BPA, 15 liters / hour of dichloromethane, phosgene is passed in the tubular reactor with internal diameter 6mm, tube length 30m continuously with the flow rate of 4.0kg / hour .

[0090] The tubular reactor has a jacket part, and cooling water is passed into the jacket to keep the temperature of the reaction solution below 40°C.

[0091] The reaction solution leaving the tubular reactor is continuously introduced into a trough reactor with a baffle with an internal volume of 40 liters of swept wings, and is further supplied with 2.8 liters / hour of sodium hydroxide aqueous solutio...

manufacture example 2～9

[0102] The type of terminal-modified PDMS (allylphenol terminal-modified PDMS or eugenol terminal-modified PDMS), the number of repetitions of dimethylsiloxane units, the amount of terminal-modified PDMS, and the amount of PTBP used are as follows: As described in Table 1, a polycarbonate-polydimethylsiloxane copolymer was produced.

[0103] Table 1 shows the PDMS residue amount (PDMS copolymerization amount), viscosity number, and viscosity average molecular weight Mv of the obtained polycarbonate-polydimethylsiloxane copolymer.

[0104]

Embodiment 1～7 and comparative example 1～3

[0106] Polycarbonate-polydimethylsiloxane copolymer (PC / PDMS copolymer), FN1500 (trade name, manufactured by Idemitsu Kosan Co., Ltd., having p-tert-butyl end group) produced in Production Examples 1 to 9 BPA polycarbonate of phenol, viscosity number 39.2, viscosity average molecular weight Mv=14500), Tufflon FN1700A (trade name, Idemitsu Kosan Co., Ltd., BPA polycarbonate having p-tert-butylphenol at the end group, viscosity Number 47.1, viscosity average molecular weight Mv=17500), Taflon FN2700A (trade name, manufactured by Idemitsu Kosan Co., Ltd., BPA polycarbonate having p-tert-butylphenol at the end group, viscosity number 69.6, viscosity average molecular weight Mv=27500 ), IRGAFOS168 (trade name, manufactured by ADEKA Co., Ltd.), blended in parts by mass described in Table 2, and pelletized at a resin temperature of 280°C using a 40mmφ single-screw extruder with a vent , the pellets were obtained.

[0107] In addition, only in Comparative Example 3, the resin tempera...

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Abstract

Disclosed is a housing for a portable electronic appliance, the housing being obtained by molding a polycarbonate resin composition comprising: 10-100 parts by mass of a polycarbonate / polyorganosiloxane copolymer (A-1) which has structural units of general formula (I) and structural units of general formula (II) and has a content of a polyorganosiloxane block comprising the structural units of general formula (II) of 1-30 mass%, in which the average number of repeated structural units of general formula (II) is 70-1,000, and which has a viscosity-average molecular weight of 13,000-26,000; and 0-90 parts by mass of an aromatic polycarbonate (A-2), which is different from (A-1), the total amount of (A-1) and (A-2) being 100 parts by mass. The housing has a small wall thickness and has excellent drop impact resistance, flowability, and heat resistance.

Description

[0001] This application is a divisional application of an invention patent application with an international filing date of June 30, 2010, an application number of 201080031461.5, and an invention title of "portable electronic device housing". technical field [0002] The present invention relates to housings for accommodating electronic equipment, etc., and more specifically, to thin-walled and durable housings molded from a polycarbonate resin composition containing a polycarbonate-polyorganosiloxane copolymer having a specific structure. A case for portable electronic equipment with excellent drop impact resistance, fluidity, and heat resistance. Background technique [0003] Resin materials are often used for casings of portable electronic devices such as portable personal computers, portable information terminals (PDAs), cellular phones, portable players, and battery casings. [0004] Assuming that the electronic device is accidentally dropped while being portable, in o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08G64/18C08J5/00B29C45/76
CPCC08G64/186B29C45/0001B29L2031/3437C08G77/448C08L69/00C08L83/10C08L83/00C08G64/18
Inventor 石川康弘田中隆义
Owner IDEMITSU KOSAN CO LTD
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