Thermoplastic resin composition and method of preparing the same

Abstract

The present disclosure relates to a thermoplastic resin composition and a method of preparing the same. In accordance with the present disclosure, a thermoplastic resin composition having superior property balance, such as processability, chemical resistance, heat stability, and impact resistance, and excellent transparency, and a method of preparing the same are provided.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims the priority benefit of Korean Patent Application No. 10-2015-0123006, filed on Aug. 31, 2015 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to a thermoplastic resin composition having superior transparency and impact resistance and a method of preparing the same, and more particularly to a thermoplastic resin composition having superior property balance, such as processability, chemical resistance, heat stability, and impact resistance, and excellent transparency, a method of preparing the same, and the like.BACKGROUND ART[0003]Recently, studies into impartation of high functionality, such as high transparency, to materials used in product models, is actively underway as the industry has advanced and the life has become diverse.[0004]For example, research into giving transparency to existing materials, su...

AI Technical Summary

Benefits of technology

The present invention provides a thermoplastic resin composition with excellent impact resistance and transparency. The composition includes a graft copolymer formed by graft-copolymerizing a conjugated diene rubber latex with a methacrylic acid alkyl ester compound, an aromatic vinyl compound, and a vinyl cyan compound, and a copolymer formed by polymerizing a methacrylic acid alkyl ester compound, an aromatic vinyl compound, and a vinyl cyan compound. The composition also satisfies a specific refractive index difference in a specific weight ratio. The graft copolymers are formed by graft-copolymerizing a conjugated diene rubber latex with a methacrylic acid alkyl ester compound, an aromatic vinyl compound, and a vinyl cyan compound. The content of the rubber latex is based on solid content of the rubber latex. The thermoplastic resin composition includes 10 to 60% by weight of the graft copolymer, 10 to 50% by weight of the graft copolymer, and 30 to 80% by weight of the copolymer, wherein (A-1)+(A-2)+(B)=100% by weight. The composition has superior impact strength and transparency.

Problems solved by technology

However, since this resin is inherently opaque, application thereof to cases requiring transparency is limited.

However, while such a polycarbonate (PC) resin has superior impact strength, transparency, and the like, processability thereof is poor, thereby making it difficult to produce complicated products.

While a polymethyl methacrylate (PMMA) resin has superior optical properties, but impact resistance and chemical resistance thereof are very poor.

In addition, a polystyrene (PS) resin, a polyacrylonitrile-styrene (SAN) resin, and the like have very poor impact resistance and chemical resistance.

However, since the imparted transparency has a limitation, application thereof to products, which have a haze of greater than 2.0 and thus in which a PMMA resin, a PC resin, an SAN resin, or the like is used, thick injection-molded products, or products requiring high transparency is limited.