Thermoplastic resin compsn. having excellent chemical resistance and easy vacuum formability

A technology of thermoplastic resin and chemical resistance, which can be used in home appliances, other home appliances, household components, etc., and can solve problems such as thick plates

Inactive Publication Date: 2004-03-10
LOTTE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resin composition has a disadvantage in vacuum formability, which makes a thick board for refrigerator inner boxes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Using a drum mixer, premix 20 parts of graft polymer (A), 10 parts of graft polymer (B), 60 parts of copolymer (C) and 10 parts of copolymer (D) for 10 minutes and add 0.2 parts Antioxidant and 0.4 part lubricant. The mixture was extruded into pellets using a twin-screw extruder with a diameter of 45 mm. The barrel temperature of the extruder was maintained at 220°C and the screw was adjusted at 300 rpm. Samples for testing physical properties were thus prepared. Specimens measuring 30 x 150 x 2 mm for testing chemical resistance were prepared by compression molding. To prepare samples for testing chemical resistance, the heater temperature was maintained at 220° C., the pressing time was 2 minutes, and the preheating time was 2 minutes. The compositions of components (A), (B), (C) and (D) and test results are shown in Table 1. testing method

[0042] For the sample prepared by the embodiment, the physical properties and chemical properties are measured as follows...

Embodiment 2-6

[0050] Except changing the content of component (A), (B), (C) and (D), carry out according to the step of embodiment 1. Comparative Examples 1-6

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PUM

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Abstract

The resin composition according to the present invention comprises(A)a graft polymer prepared by grafting in emulsion polymerization 100 parts by weight of monomer mixture comprising 20-30% by weight of vinyl cyanide compound and 70-80% by weight of vinyl aromatic compound to 20-60 parts by weight of diene rubber,(B)a graft polymer prepared by grafting in emulsion polymerization 100 parts by weight of monomer mixture comprising 20-30%by weight of vinyl cyanide compound and 70-80% by weight of vinyl aromatic compound to 20-60 parts by weight of acrylic rubber,(C)a linear copolymer prepared by polymerizing 40-50% by weight of vinyl cyanide compound and 50-60% by weight of vinyl aromatic compound, and (D) a branched copolymer prepared by 30-35% by weight of vinyl cyanide compound and 65-70% by weight of vinyl aromatic compound.

Description

field of invention [0001] The present invention relates to a thermoplastic resin composition having good chemical resistance and easy vacuum forming. More particularly, the present invention relates to a thermoplastic resin composition capable of forming an inner box of a refrigerator, which has good physical properties, easy vacuum forming and excellent Freon resistance, especially excellent resistance to HCFC 141b. Background of the invention [0002] The shell of the refrigerator is assembled from an inner box and an outer box, and the space between the two boxes is filled with rigid polyurethane foam. Usually the outer case is made of thin steel plate, and the inner case is made of resin plate obtained by vacuum forming method. Rigid polyurethane foam acts as a thermal insulator and is formed by injection molding of liquid polyurethane and blowing agent. [0003] Vinyl-butadiene-styrene (hereinafter referred to as ABS) resins have been mainly used in inner boxes of ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00B29C51/10B29K96/02B29L31/00C08L25/00C08L25/12C08L51/04C08L55/02
CPCC08L51/04C08L55/02C08L25/12C08L2205/02C08L2666/02C08L2666/24C08L2666/04
Inventor 崔真丸金星国李庚南郑宗勋
Owner LOTTE ADVANCED MATERIALS CO LTD
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