Thermoplastic elastomer composition and thermoplastic resin composition using the same

Abstract

The invention provides a thermoplastic elastomer composition comprising: (a) 100 parts by weight of a hydrogenated block copolymer; (b) 0.01 to 3 parts by weight of an organic peroxide; and (c) 1 to 80 parts by weight of a carboxylated liquid polybutadiene. Also disclosed is a thermoplastic resin composition comprising the thermoplastic elastomer composition.

Description

technical field [0001] The present invention relates to a thermoplastic elastomer composition and a thermoplastic resin composition (composite product) using the thermoplastic elastomer composition. In particular, the present invention relates to thermoplastic elastomers rich in flexibility, excellent in heat deformation resistance and moldability, excellent in compatibility with resins having polar groups, and capable of softening thermoplastic elasticity of resins having polar groups due to excellent flexibility. body composition, and relates to a thermoplastic resin composition that uses the thermoplastic elastomer composition, is rich in flexibility, is excellent in bleeding resistance, and generates less gas during molding and has less air bubbles entering molded products . Background technique [0002] Recently, thermoplastic elastomers, which are soft materials with rubber elasticity, do not require a vulcanization process, and have the same moldability and recyclabi...

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Problems solved by technology

[0011] However, all compositions also suffer from insufficient compatibility with thermoplastic elastomers, poor tensile properties at high temperatures, especially at 100°C, and poor balance between compression set and hardness.

In addition, depending on the compounding ratio with thermoplastic elastomers, there are disadvantages of poor moldability, that is, skin peeling and flow marks are generated in injection molding, and gums and rough surfaces are generated in extrusion molding, and low molecular weight is also exuded components

[0012] Furthermore, the present inventors have invented a resin having a polar group and a thermoplastic resin composition comprising a hydrogenated product of a block copolymer or the like, an ester-based compound, a thermoplastic elastomer composition of an organic peroxide ( For example, see Patent Document 17); a thermoplastic elastomer comprising a polyacetal resin and a hydrogenated product containing a block copolymer, a rubber softener, an organic peroxide, and liquid polybutadiene having a hydroxyl group at the terminal. Resin composition (for example, see Patent Document 18); a thermoplastic elastomer composition excellent in compatibility with resins having polar groups, which is obtained by combining two hydrogenated block copolymers with different hydrogenation rates, That is, the elastomer mixture of hydrogenated block copolymer with high hydrogenation rate and hydrogenated block copolymer with low hydrogenation rate is mixed with rubber softener, organic peroxide, liquid polybutadiene with hydroxyl at the end and optionally A variety of monomers are mixed to obtain elastomers and monomers by graft polymerization (see Patent Document 19); but depending on the molding conditions, there is a problem that a large amount of gas is generated during molding, so that the working environment becomes poor, and In some cases, it is easy to generate air bubbles in the molded product