US-20260125547-A1 - THERMOPLASTIC RESIN COMPOSITION

Abstract

The present invention relates to a thermoplastic resin composition including: a base resin including a diene-based graft polymer and a vinyl-based non-grafted polymer including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; and an additive including an olefin-based non-grafted polymer including an olefin-based monomer unit, a (meth)acrylate-based monomer unit, and a maleic acid-based monomer unit.

Inventors

• Jin Oh NAM
• Seung Hun Han
• Ho NAMGUNG

Assignees

• LG CHEM, LTD.

Dates

Publication Date

20260507

Application Date

20231023

Priority Date

20221021

Claims (10)

1. 1 . A thermoplastic resin composition comprising: a base resin including a diene-based graft polymer and a vinyl-based non-grafted polymer including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; and an additive including an olefin-based non-grafted polymer including an olefin-based monomer unit, a (meth)acrylate-based monomer unit, and a maleic acid-based monomer unit.
2. 2 . The thermoplastic resin composition of claim 1 , comprising 0.5 to 5.0 parts by weight of the olefin-based non-grafted polymer based on 100 parts by weight of the base resin.
3. 3 . The thermoplastic resin composition of claim 1 , wherein the olefin-based non-grafted polymer is a terpolymer composed of an olefin-based monomer unit, a (meth)acrylate-based monomer unit, and a maleic acid-based monomer unit.
4. 4 . The thermoplastic resin composition of claim 1 , wherein the olefin-based non-grafted polymer is an ethylene/ethyl acrylate/maleic anhydride terpolymer.
5. 5 . The thermoplastic resin composition of claim 1 , wherein the diene-based graft polymer includes a diene-based rubber polymer and a shell including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit that are grafted to the diene-based rubber polymer.
6. 6 . The thermoplastic resin composition of claim 1 , comprising 10.0 to 40.0 parts by weight of the diene-based graft polymer based on 100 parts by weight of the base resin.
7. 7 . The thermoplastic resin composition of claim 1 , wherein the base resin includes a maleimide-based non-grafted polymer including a maleimide-based monomer unit, an aromatic vinyl-based monomer unit, and a maleic acid-based monomer unit.
8. 8 . The thermoplastic resin composition of claim 7 , comprising 10.0 to 50.0 parts by weight of the maleimide-based non-grafted polymer based on 100 parts by weight of the base resin.
9. 9 . The thermoplastic resin composition of claim 7 , wherein the maleimide-based non-grafted polymer is a terpolymer composed of a maleimide-based monomer unit, an aromatic vinyl-based monomer unit, and a maleic acid-based monomer unit.
10. 10 . The thermoplastic resin composition of claim 7 , wherein the maleimide-based non-grafted polymer is an N-phenylmaleimide/styrene/maleic anhydride polymer.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present invention is a National Phase of International Application No. PCT/KR2023/016513 which claims priority to and the benefit of Korean Patent Application No. 10-2022-0136421, filed on Oct. 21, 2022, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to a thermoplastic resin composition. BACKGROUND ART Diene-based graft polymers include a diene-based rubber polymer and a shell including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit that are grafted to the diene-based rubber polymer. Compared to high impact polystyrene (HIPS), diene-based graft polymers have excellent physical properties such as high impact resistance, chemical resistance, thermal stability, colorability, fatigue resistance, rigidity, and processability. Due to these physical properties, diene-based graft polymers have been used as parts of automotive interior and exterior materials, office appliances, and various electrical and electronic products or toys. However, despite these excellent physical properties, cracks occurred when a strong solvent was used to evaluate the chemical resistance of the diene-based graft polymer. To solve the above problem, research has been conducted to adjust the content of rubber in the diene-based graft polymer or increase the size of the diene-based graft polymer. However, in this case, the fluidity of the diene-based graft polymer was reduced, and there was a limit to the extent to which chemical resistance could be improved due to increased residual stress in thermoplastic resin molded products. RELATED ART DOCUMENTS Patent Documents (Patent Document 1) KR2011-0061303A DISCLOSURE Technical Problem The present invention is directed to providing a thermoplastic resin composition with excellent processability, impact resistance, heat resistance, and chemical resistance. Technical Solution In order to solve the above-mentioned problems, 1) the present invention provides a thermoplastic resin composition which includes: a base resin including a diene-based graft polymer and a vinyl-based non-grafted polymer including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; and an additive including an olefin-based non-grafted polymer including an olefin-based monomer unit, a (meth)acrylate-based monomer unit, and a maleic acid-based monomer unit. 2) According to 1), the present invention provides a thermoplastic resin composition including 0.5 to 5.0 parts by weight of the olefin-based non-grafted polymer based on 100 parts by weight of the base resin. 3) According to 1) or 2), the present invention provides a thermoplastic resin composition, wherein the olefin-based non-grafted polymer is a terpolymer composed of an olefin-based monomer unit, a (meth)acrylate-based monomer unit, and a maleic acid-based monomer unit. 4) According to any one of 1) to 3), the present invention provides a thermoplastic resin composition, wherein the olefin-based non-grafted polymer is an ethylene/ethyl acrylate/maleic anhydride terpolymer. 5) According to any one of 1) to 4), the present invention provides a thermoplastic resin composition, wherein the diene-based graft polymer includes a diene-based rubber polymer and a shell including an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit that are grafted to the diene-based rubber polymer. 6) According to any one of 1) to 5), the present invention provides a thermoplastic resin composition including 10.0 to 40.0 parts by weight of the diene-based graft polymer based on 100 parts by weight of the base resin. 7) According to any one of 1) to 6), the present invention provides a thermoplastic resin composition, wherein the base resin includes a maleimide-based non-grafted polymer including a maleimide-based monomer unit, an aromatic vinyl-based monomer unit, and a maleic acid-based monomer unit. 8) According to 7), the present invention provides a thermoplastic resin composition including 10.0 to 50.0 parts by weight of the maleimide-based non-grafted polymer based on 100 parts by weight of the base resin. 9) According to 7) or 8), the present invention provides a thermoplastic resin composition, wherein the maleimide-based non-grafted polymer is a terpolymer composed of a maleimide-based monomer unit, an aromatic vinyl-based monomer unit, and a maleic acid-based monomer unit. 10) According to any one of 7) to 9), the present invention provides a thermoplastic resin composition, wherein the maleimide-based non-grafted polymer is an N-phenylmaleimide/styrene/maleic anhydride polymer. Advantageous Effects A thermoplastic resin composition according to an embodiment of the present invention exhibits excellent processability, impact resistance, heat resistance, and chemical resistance. MODES OF THE INVENTION Hereinafter, the present invention will be described in further detail to help in understanding the pr