Resin composition

A resin composition, resin technology, used in the manufacture of molded bodies and vehicle exterior materials

Active Publication Date: 2008-03-12
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As mentioned above, in the PC / PET alloy, many proposals have been proposed for improving impact resistance, rigidity, heat resistance, thermal stability, etc., but there is no proposal for large-scale parts that require thinner wall and lighter molding at the same time. Proposal of resin composition with required fluidity and chemical resistance required for molding parts requiring stable painted appearance

Method used

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  • Resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0293]

[0294] The pellets (E1)-(E6) of the resin composition were produced using the raw material of the kind and quantity shown in Table 1 with the extruder. As the extruder, TEM-48SS (L / D=50, number of barrels: 13) manufactured by Toshiba Machine Co., Ltd. was used. Use a paddle dryer for the powdery component A, and use a hopper dryer to dry the granular A component at 120°C for more than 4 hours before feeding it in from the main feeder. Component B is pre-dried in a hopper dryer at 120°C for more than 4 hours, and then fed from the main feeder. Component D and wax are premixed and fed from a side feeder using a metering machine separate from component B. For ingredients other than these, pre-mix with a Henschel mixer before feeding from the main feeder. Set exhaust at the 10th barrel, and perform suction with a vacuum degree below 6kPa. Other extrusion conditions are: barrel set temperature 260°C, die set temperature 270°C, extrusion rate 200kg / hour, and screw spee...

Embodiment 7～12

[0300]

[0301]The pellets (E1) to (E6) were dried at 120° C. for 4 hours to form a molded body for vehicle exterior materials shown in FIG. 1 . J1300E-C5 manufactured by Nippon Steel Works Co., Ltd. was used for molding. The set temperature of the barrel is 270°C, and the mold temperature is 60°C. The front end of the sprue is connected to the valve gate of the hot runner mold, and the valve gate connected to each gate is opened in the following order. That is, first, the gate (16) at the top of the molded body tower and the gate (15) at the lower part existing on the axis of symmetry are opened. Then, immediately after the molten resin from the gate 16 passes through the gate 11 , the valve is opened to supply the molten resin from the gate 11 . In addition, the valve is opened immediately after the molten resin from the gate 15 passes through the gate 14 to supply the molten resin from the gate 14 . The linear distance from gate 16 to gate 11 on the surface of the oute...

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Abstract

Disclosed is a resin composition comprising an aromatic polycarbonate and a polyethylene terephthalate, which has high chemical resistance and is excellent in impact resistance, heat resistance, stiffness and thermal stability while maintaining good fluidability. Also disclosed is a molded article produced from the resin composition. Further disclosed is a process for production of a vehicle exterior material. The resin composition comprises 50 to 100 wt% of a resin component and 0 to 50 wt% of an inorganic filler (component D), the resin component comprising (i) an aromatic polycarbonate having a specified viscosity average molecular weight (component A) and (ii) a polyethylene terephthalate having a specified inherent viscosity (IV), a specified terminal carboxyl group content and a specified ratio of a weight average molecular weight (Mw) to a number average molecular weight (Mn) (Mw/Mn) (component B), provided that (iii) the ratio by weight of the total amount of the components A and D to the amount of the component B [(A+D)/B] falls within the range from 60/40 to 85/15.

Description

technical field [0001] The present invention relates to a resin composition containing an aromatic polycarbonate (hereinafter, sometimes referred to as PC) and polyethylene terephthalate (hereinafter, sometimes referred to as PET). In addition, the present invention relates to a molded body such as a vehicle exterior material and a method for producing the vehicle exterior material, which are formed from the composition. Background technique [0002] In recent years, in automobiles and OA equipment, the thickness reduction and weight reduction of parts are rapidly progressing. For example, in automobiles, attempts have been made to manufacture large parts represented by body panels such as fenders using resin compositions for weight reduction. [0003] As a resin composition used for automobiles and OA equipment, there is a resin composition containing PC and PET (hereinafter, sometimes referred to as PC / PET alloy). The PC / PET alloy is a useful resin composition because it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K3/00C08L67/02B29C45/27
Inventor 鬼泽大光西广喜秀林田充史
Owner TEIJIN KASEK KK
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