Fire-retarded polycarbonate resin composition

A kind of composition and technology of flame retardant additive, applied in the field of flame retardant polycarbonate resin composition, can solve problems such as incompatibility

Inactive Publication Date: 2007-05-02
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, brominated additives are not suitable for compositions that are required to meet "ECO-convenience" standards, as these standards restrict the inclusion of bromine or chlorine

Method used

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  • Fire-retarded polycarbonate resin composition
  • Fire-retarded polycarbonate resin composition
  • Fire-retarded polycarbonate resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Polycarbonate samples for flammability testing according to the UL94 procedure were prepared by blending two different molecular weight grades of linear LEXAN(R) polycarbonate resin to achieve a target melt flow of 15 to 16, according to ASTM D1238 Measured at 300°C, 1.2 kg. Certain compositions also included 0.35 phr of pentaerythritol tetrastearate (PETS) mold release agent. The powder blend samples were extruded and cut into beads at a temperature range of 230 to 290°C. These bead samples were injection molded at a temperature of 295°C into test parts having dimensions of 5 inches by 1 / 2 inches and a thickness of 125 mils.

[0018] These parts were tested using the standard Underwriters Laboratory UL94 test method (2 day treatment method), except that 20 bars were tested instead of the usual 5 bars. The data was analyzed by first calculating the average time to fire (avFOTsec), standard deviation of time to fire (sdFOTsec) and total drops and using statistical meth...

Embodiment 2

[0031]Samples were prepared in the same manner as in Example 1, except that the polycarbonate resin used was 70 parts by weight of branched polycarbonate resin containing 0.42mol% 1,1,1-tris(hydroxyphenyl)ethane and A blend of 30 parts by weight linear polycarbonate resin to achieve a target melt flow of 2 to 3, measured according to ASTM D1238 at 300°C, 1.2 kg. Also included is a UV stabilizer (UV5411, 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole). Samples were extruded at 240 to 305°C and injection molded at 320-332°C into test parts having thicknesses of 60 mil, 75 mil and 125 mil. These formulations and results are summarized in Tables 2A and B. A comparative test was carried out at 60mil and 125mil. The 60 mil test showed only marginal performance with no trend for all samples with KPFBS and drip failure for all samples without KPFBS. The 125 mil test had p(FTP) 0.9867 for the sample with 0.07K PFBS. Other samples containing KPFBS were not tested as they passed at 75...

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Abstract

Improved fire-retarded properties can be imparted to polycarbonate resin composition by incorporating into the polycarbonate a fire-retardant component containing a perfluoroalkane sulfonate such as potassium perfluorobutane sulfonate and a cyclic siloxane such as octaphenylcyclotetrasiloxane. The fire-retardant component is suitably added at levels to form a polycarbonate composition in which the perfluoroalkane sulfonate is present in an amount of from 0.02 to 0.1 phr relative to the composition as a whole, and the cyclic siloxane is present in an amount of at least 0.02 relative to the composition as a whole.

Description

[0001] The patent application of the present invention is the application number of 01808669.1 (international application number is PCT / US01 / 05427), the application date is February 20, 2001, and the invention name is "flame retardant polycarbonate resin composition" of the invention patent application. case application. technical field [0002] This application relates to flame retardant polycarbonate resin compositions. Because of its strength and transparency, polycarbonate resins have particularly many notable industrial uses. Unfortunately, polycarbonate resin itself is combustible and will drip hot melt material, causing nearby materials to also catch fire. Therefore, to safely use polycarbonate in many applications, it is necessary to include additives that impede the flammability properties of the material and / or reduce dripping. The challenge is to identify additives that accomplish this without compromising the required strength and transparency, introducing new pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/541C08K5/42C08L69/00C08K5/00C08K5/549
CPCC08K5/42C08K5/0066C08K5/549C08L69/00
Inventor N·R·罗森圭斯特R·K·辛格赫J·H·文格罗维尤斯
Owner SABIC GLOBAL TECH BV
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