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Aromatic polycarbonate resin composition and process for producing the same

A technology of polycarbonate resin and resin composition, which is applied in the preparation of the resin composition, prevents the melting and dripping of the aromatic polycarbonate resin composition, and the method that can solve the differences and the flame retardancy is not clear. , flame retardancy reduction and other issues, to achieve the effect of preventing melt dripping, excellent flame retardancy, and improved flame retardancy

Inactive Publication Date: 2007-08-22
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While these proposals go a long way in clarifying factors that degrade flame retardancy, they do not quite clarify how they differ from commercially available fluorine-containing organometallic salt compounds
In particular, in practical applications, polycarbonate resins are often compounded with various additives, but a method to achieve good flame retardancy without detracting from the effects of compounding additives has not yet been clarified

Method used

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  • Aromatic polycarbonate resin composition and process for producing the same
  • Aromatic polycarbonate resin composition and process for producing the same
  • Aromatic polycarbonate resin composition and process for producing the same

Examples

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preparation example Construction

[0065] The preparation of A-3 component can utilize a well-known method, for example, the method of preparation of the high molecular weight component containing polycarbonate resin in Unexamined-Japanese-Patent No. 2003-82218.

[0066] The viscosity average molecular weight in the present invention is calculated as follows: First, dissolve 0.7g of aromatic polycarbonate in 100mL of dichloromethane at 20°C, and use an Ostwald viscometer to obtain the obtained solution according to the following formula: The specific viscosity (sp),

[0067] Specific viscosity (η SP )=(t-t 0 ) / t 0

[0068] [t 0 Indicates the number of seconds of dripping of dichloromethane, and t indicates the number of seconds of dripping of the sample solution]

[0069] Through the following formula, by the obtained specific viscosity (η SP ) to calculate the viscosity average molecular weight M.

[0070] n SP / c=[η]+0.45×[η] 2 c ([η] means intrinsic viscosity)

[0071] [η]=1.23×10 -4 m 0.83

[0...

Embodiment 1-10 and comparative example 1-3

[0370] (I-1) Evaluation items

[0371] (I-1-i) Flame retardancy

[0372] Combustion tests were carried out in accordance with the vertical burning test method of UL Standard 94 using test pieces having a shape conforming to UL Standard 94 and having thicknesses described in Tables 1-3. Record whether there is dripping and the longest burning seconds in a group of 5 test pieces. A sample in which at least one piece dripped was deemed to have no record of the longest burning seconds. After the test piece was molded, it was preserved for 48 hours in an atmosphere with a temperature of 23° C. and a relative humidity of 50%. The above-mentioned preserved test pieces were burnt to perform a combustion test.

[0373] (I-1-ii) Transparency

[0374]A smooth flat-plate test piece having a length of 50 mm x width of 50 mm x a thickness of 2.0 mm and an arithmetic mean roughness (Ra) of the surface of 0.03 μm was prepared by injection molding. The turbidity of the said test piece was...

Embodiment 11、12 and comparative example 4

[0386] (II-1) Evaluation items

[0387] (II-1-i) Flame retardancy

[0388] Flame retardancy evaluation was performed with the test piece of the thickness shown in Table 4 by the same method as said (I-1-i).

[0389] (II-1-ii) Weather resistance

[0390] Using a weathering tester (Sanshiyain·ウエザ一·Metera) (manufactured by Suga Testing Machine Co., Ltd.: WEL-SUN: HC-B), according to the conditions of JIS A 1415, the discharge voltage and current are 48-52V, blackboard (ブラツク Panel) temperature 63±3℃, humidity 50%, with 18 minutes of water spray and 102 minutes of no spray as a cycle of 120 minutes, the square plate obtained by the following method was treated for 1000 hours, and then the yellowness was measured according to JIS K7103 Variation YI, the difference ΔYI before and after the treatment was evaluated. YI value was calculated|required from X, Y, and Z value by the following formula using Z-1001DP manufactured by Nippon Denshoku Co., Ltd.

[0391] YI=[100-(1.28X-1.06Z)]...

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Abstract

A process of manufacturing the resin compositon and a method of preventing the melt dripping during combustion of the resin composition. The flame retardancy of the above aromatic polycarbonate resin composition comprising the fluorine-containing organic metal salt compound is improved. An aromatic polycarbonate resin composition containing a fluorinated organometal salt compound. The resin composition has improved flame retardancy. The resin composition comprises (1) 100 parts by weight of an aromatic polycarbonate resin (ingredient (A)), (2) 0.005-0.6 parts by weight of a fluorinated organometal salt (ingredient (B)) having a fluoride ion content as measured by ion chromatography of 0.2-20 ppm by weight, and (3) at least one ingredient selected from the group consisting of a flame retardant (ingredient (C)), fatty acid ester (ingredient (D)), ultraviolet absorber (ingredient (E)), polytetrafluoroethylene having fibril-forming ability (ingredient (F)), filler (ingredient (G)), silicate mineral (ingredient (H)), and titanium dioxide pigment (ingredient (I)). Also provided is a method of preventing a resin composition from melting / dripping upon combustion.

Description

technical field [0001] The present invention relates to aromatic polycarbonate resin compositions. More specifically, the present invention relates to an aromatic polycarbonate resin composition in which melt dripping (hereinafter may be referred to as "dripping") is suppressed during combustion and is excellent in flame retardancy. The invention also relates to a preparation method of the resin composition. The present invention also relates to a method for preventing melt dripping of an aromatic polycarbonate resin composition. Background technique [0002] Aromatic polycarbonate resins are used in a wide range of fields as a material for various moldings due to their transparency and impact resistance. In addition, in applications using the aromatic polycarbonate resin, attention has been paid to flame retardancy during fire in recent years, and resin compositions having high flame retardancy in addition to the above-mentioned characteristics have been demanded. As a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08J3/22C08K3/22C08K5/42C08L27/18
Inventor 大平洋二小野哲志伊藤英和高木诚友田琢也中川秀则竹尾充浩古屋和彦
Owner TEIJIN LTD
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