Thermoplastic resin composition and molded article formed therefrom
A technology of resin composition and plasticity, which is applied in the field of thermoplastic resin composition and its molded products, can solve the problems of low shear viscosity of extensional viscosity, affecting the characteristics of pressing board, and shear viscosity cannot be reduced, so as to achieve reduction Effect of shear viscosity and elongational viscosity increase
Active Publication Date: 2020-07-17
CHI MEI CORP
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Problems solved by technology
[0003] In the prior art, it is known that the shear viscosity and extensional viscosity of thermoplastic resins can be improved by adding a small amount of linear (linear) copolymer or branched (branched) copolymer. However, once the added content is too much, because The shear viscosity of thermoplastic resin cannot be lowered, which affects its pressing properties; therefore, how to make thermoplastic resin have high elongational viscosity and low shear viscosity at the same time is a problem to be solved
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[0021] Hereinafter, embodiments of the present invention will be described in detail. However, these embodiments are illustrative, and the present disclosure is not limited thereto.
[0022] In an embodiment of the present invention, the thermoplastic resin composition includes a branched copolymer and a rubber-modified styrene resin. The branched copolymer comprises a tetramercaptan compound unit, a first styrene-based monomer unit, and a first acrylonitrile-based monomer unit; the rubber-modified styrene-based resin comprises a continuous-phase styrene-based copolymer The rubber particles of the dispersed phase include the first styrene-acrylonitrile copolymer and the second styrene-acrylonitrile copolymer with different weight average molecular weights in the styrene copolymer, and based on the first The total content of the styrene-acrylonitrile copolymer and the second styrene-acrylonitrile copolymer is 100% by weight, the content of the first styrene-acrylonitrile copol...
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Abstract
The invention provides a thermoplastic resin composition and a molded article formed thereofrom. The thermoplastic resin composition comprises a branched copolymer and a rubber-modified styrene resin, wherein the branched copolymer comprises a tetrathiol compound unit, a styrene monomer unit and an acrylonitrile monomer Unit. The rubber-modified styrenic resin comprises 70% by weight to 90% by weight of a continuous phase formed by a styrenic copolymer and a dispersion phase formed by 10 to 30% by weight of rubber particles, wherein the styrenic copolymer comprises first and second styrene-acrylonitrile-based copolymers differing in the weight average molecular weight, and the contents of the first and second styrene-acrylonitrile-based copolymers are from 45% by weight to 55% by weight based on the total amount of the styrene-acrylonitrile-based copolymer. The composition and the molded article can improve extension viscosity, reduce shear viscosity, and is suitable for many kinds of processing methods.
Description
technical field [0001] The present invention relates to a resin composition, in particular to a thermoplastic resin composition and its molded product. Background technique [0002] Thermoplastic resins such as styrenic resins have been widely used in various fields such as home appliances, machine parts, office supplies, electronic components, or automobile industries. Among them, because the surface gloss of the molded products made of styrene-based resin is uniform, the appearance looks very beautiful, and it is often used for the appearance of products. The common thermoplastic resin processing methods, such as injection molding, extrusion molding or blow molding, can shape the thermoplastic resin. In addition, there are also special processing methods such as vacuum forming, which is to first press the resin into a sheet, then heat and soften, and use vacuum pressure to make the required molded product; among them, the difficulty of pressing the sheet It is related to...
Claims
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IPC IPC(8): C08L25/12C08L51/04C08F212/08C08F220/44C08F279/04
CPCC08F212/08C08F220/44C08F279/04C08L25/12C08L51/04C08L2205/025C08L2205/035C08L55/00C08L81/08C08L2205/02
Inventor 李至程苏文义
Owner CHI MEI CORP