Thermoplastic resin composition

A technology of thermoplastic resin and composition, which is applied in the field of thermoplastic resin composition, and can solve problems such as not necessarily sufficient impact resistance or formability

Inactive Publication Date: 2006-12-13
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impact resistance and moldability of extremely thin molded products are not necessarily sufficient

Method used

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  • Thermoplastic resin composition
  • Thermoplastic resin composition
  • Thermoplastic resin composition

Examples

Experimental program
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Embodiment

[0043] The present invention will be described in more detail below using examples, but the present invention is not limited to these examples.

[0044] First, the production of the raw material resin will be described.

[0045] (1) Manufacture of styrene-(meth)acrylate copolymer

reference example 1

[0046] Reference example 1: Styrene-(meth)acrylate copolymer A-1

[0047] In an autoclave with a capacity of 250 liters, add 100 kg of pure water, 0.5 g of sodium dodecylbenzenesulfonate, 250 g of calcium phosphate, 23 kg of styrene, 73 kg of methyl methacrylate, 4 kg of acrylonitrile, and then add 100 g of polymer The initiator tert-butyl peroxyisobutyrate and 650 g of t-dodecanethiol were stirred at a rotation speed of 150 rpm to disperse the mixed solution. Then, the mixed solution was heat-polymerized at a temperature of 90° C. for 8 hours, and then heat-polymerized at 130° C. for 2.5 hours. After completion of the reaction, it was washed, dehydrated, and then dried to obtain bead-like styrene-(meth)acrylate copolymer A-1.

reference example 2

[0048] Reference example 2: Styrene-(meth)acrylate copolymer A-2

[0049] In addition to changing the amount of t-dodecanethiol in Reference Example 1 to 800g, other styrene-(meth)acrylate copolymers A-1 were the same to obtain styrene-(meth)acrylic acid Ester copolymer A-2.

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PUM

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Abstract

A thermoplastic resin composition excellent in transparency and capable of giving molded articles which are excellent in impact resistance and fabrication quality even when they have thin walls. The thermoplastic resin composition comprises a rubber-modified styrene resin composition comprising 60 to 80 % by mass of a continuous phase made of a styrene / (meth)acrylate copolymer and 40 to 20 % by mass of a dispersed phase made of a graft copolymer obtained by grafting a rubbery elastomer with a styrene / (meth)acrylate copolymer wherein the volume-mean particle diameter of the dispersed phase is 0.3 to 0.6 mum and the weight-average molecular weight (Mw) of the continuous phase and the constituent monomer units thereof satisfy a specific relationship and is characterized by containing 0.005 to 0.05 part by mass of an organopolysiloxane and, if necessary, 0.1 to 2.5 parts by mass of an ester lubricant per 100 parts by mass of the rubber-modified styrene resin composition.

Description

technical field [0001] The present invention relates to a thermoplastic resin composition capable of obtaining a molded article having good transparency and excellent impact resistance and moldability even if it is very thin. Background technique [0002] Conventionally, a method of obtaining a thermoplastic resin composition excellent in impact resistance and transparency by mixing an MBS-based polymer with a rubber-modified styrene-based polymer is well known (Japanese Patent Publication No. Sho 46-32748) , wherein the MBS polymer is a mixture of two or more monomers selected from styrene, methyl methacrylate and acrylonitrile and butadiene and styrene, or acrylonitrile and butadiene monomers The colloidal polymer latex obtained by emulsion polymerization is obtained by emulsion polymerization. However, these thermoplastic resin compositions have a disadvantage that good transparency cannot be obtained in some cases depending on molding conditions, although impact resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/08C08L33/06C08L51/04C08L83/04C08K5/10C08K5/54C08L25/14
CPCC08K5/54C08L25/14C08K5/10C08L51/04C08L2666/24C08L25/08C08L33/06C08L83/04
Inventor 野口哲央加藤义明
Owner DENKA CO LTD
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