CN-122003465-A - Thermoplastic resin composition and process for producing the same

Abstract

The thermoplastic resin composition according to an embodiment of the present invention may include a base resin including a recycled resin, a virgin diene-based graft polymer, and a virgin vinyl-based non-graft polymer, and an additive, and satisfies the following mathematical formula 1.[ mathematics 1] In the above-mentioned formula 1, A represents the area (integral) of a peak observed in the range of 3.95ppm to 4.15ppm in 1 H-NMR of the thermoplastic resin composition, B represents the area (integral) of a peak observed in the range of 0.91ppm to 1.03ppm in 1 H-NMR of the thermoplastic resin composition, and C represents the area (integral) of a peak observed in the range of 6.4ppm to 7.5ppm in 1 H-NMR of the thermoplastic resin composition.

Inventors

• JIN CHENGJUN
• Jin Ruihe
• HUANG WENZI
• CUI YINTING
• HAN SHIZHEN
• JIN RONGMIN
• Pei Chenggao

Assignees

• 株式会社LG化学

Dates

Publication Date

20260508

Application Date

20241011

Priority Date

20231013

Claims (10)

1. 1. A thermoplastic resin composition comprising a base resin and an additive, the base resin comprising a recycled resin, a virgin diene-based graft polymer, and a virgin vinyl-based non-graft polymer, and the thermoplastic resin composition satisfying the following mathematical formula 1: [ mathematics 1] Wherein, in the above formula 1, A represents the area (integral) of a peak observed in the 1 H-NMR of the thermoplastic resin composition in the range of 3.95ppm to 4.15ppm, B represents an area (integral) of a peak observed in a range of 0.91ppm to 1.03ppm in 1 H-NMR of the thermoplastic resin composition, C represents the area (integral) of the peak observed in the 1 H-NMR of the thermoplastic resin composition in the range of 6.4ppm to 7.5 ppm.
2. 2. The thermoplastic resin composition of claim 1, wherein said additive is an acrylic non-grafted polymer.
3. 3. The thermoplastic resin composition of claim 2, wherein said acrylate non-grafted polymer has a weight average molecular weight of 1,000g/mol to 5,000g/mol.
4. 4. The thermoplastic resin composition of claim 2, wherein said acrylic non-grafted polymer is an acrylic homopolymer.
5. 5. The thermoplastic resin composition of claim 2, wherein said acrylic non-grafted polymer comprises at least one of polymethyl acrylate, polyethyl acrylate, and polybutyl acrylate.
6. 6. The thermoplastic resin composition according to claim 2, wherein the acrylic non-graft polymer is contained in an amount of 0.10 to 1.00 parts by weight relative to 100 parts by weight of the base resin.
7. 7. The thermoplastic resin composition of claim 1, wherein said recycled resin comprises at least one selected from the group consisting of recycled polyethylene, recycled polypropylene, recycled polyester, recycled polystyrene, recycled polyamide, recycled polycarbonate, recycled diene-based graft polymer, and recycled vinyl-based non-graft polymer.
8. 8. The thermoplastic resin composition of claim 1, wherein said virgin diene graft polymer comprises a diene rubber polymer, and a shell comprising vinyl cyanide-based monomer units and vinyl aromatic monomer units grafted onto said diene rubber polymer.
9. 9. The thermoplastic resin composition of claim 1, wherein said virgin vinyl non-grafted polymer comprises vinyl cyanide-based monomer units and vinyl aromatic monomer units.
10. 10. The thermoplastic resin composition according to claim 1, wherein, with respect to 100 parts by weight of the base resin, Comprises 10 to 95 parts by weight of the recycled resin, 5 to 30 parts by weight of the virgin diene graft polymer, and 1 to 60 parts by weight of the virgin vinyl non-graft polymer.

Description

Thermoplastic resin composition and process for producing the same Technical Field Cross Reference to Related Applications The present application claims the benefit of korean patent application No. 2023-013975, filed on the korean intellectual property office on the date 10/13 of 2023, the disclosure of which is incorporated herein by reference in its entirety. The present invention relates to a thermoplastic resin composition and a method for preparing the same. Background The diene-based graft polymer comprises a diene-based rubber polymer, and a shell comprising vinyl aromatic monomer units and vinyl cyanide-based monomer units grafted onto the diene-based rubber polymer. Diene graft polymers are superior to typical High Impact Polystyrene (HIPS) in impact resistance, chemical resistance, thermal stability, colorability, fatigue resistance, rigidity, and processability. These properties enable molded articles made of a thermoplastic resin composition comprising a diene-based graft polymer to be used as automobile interior and exterior materials, office equipment, parts for various electric and electronic products, food containers, cosmetic containers or pharmaceutical containers. Recently, with the growing interest in sustainable development, studies have been made on using recycled resins obtained by recycling resin waste as raw materials for thermoplastic resin compositions. However, the recycled resin contains various impurities including foreign matters, thereby causing a decrease in impact strength when used as a raw material of the thermoplastic resin composition. Furthermore, the recycled resin is mainly provided in pellet form by extrusion processing, which results in a significant deviation of physical properties at the point in production compared to virgin resin in powder form. Accordingly, there is a need for a thermoplastic resin composition that provides improved impact resistance and reduced performance bias in production even when a recycled resin is used as a raw material. Disclosure of Invention Technical problem An aspect of the present invention provides a thermoplastic resin composition which exhibits excellent impact resistance and processability even if it contains a recycled resin as a component and is minimized in performance deviation at the point of production, and a method for producing the same. Technical proposal (1) According to one aspect of the present invention, there is provided a thermoplastic resin composition comprising a base resin and an additive, the base resin comprising a recycled resin, a virgin diene-based graft polymer, and a virgin vinyl-based non-graft polymer, and the thermoplastic resin composition satisfying the following mathematical formula 1. [ Mathematics 1] In the above-mentioned formula 1, A represents the area (integral) of the peak observed in the range of 3.95ppm to 4.15ppm in 1 H-NMR of the thermoplastic resin composition, B represents the area (integral) of the peak observed in the range of 0.91ppm to 1.03ppm in 1 H-NMR of the thermoplastic resin composition, and C represents the area (integral) of the peak observed in the range of 6.4ppm to 7.5ppm in 1 H-NMR of the thermoplastic resin composition. (2) The present invention provides the thermoplastic resin composition according to the above (1), wherein the additive is an acrylic non-grafted polymer. (3) The present invention provides the thermoplastic resin composition according to the above (1) or (2), wherein the acrylic non-grafted polymer has a weight average molecular weight of 1,000g/mol to 5,000g/mol. (4) The present invention provides the thermoplastic resin composition according to any one of the above (1) to (3), wherein the acrylic non-grafted polymer is an acrylic homopolymer. (5) The present invention provides the thermoplastic resin composition according to any one of the above (1) to (4), wherein the acrylic non-grafted polymer comprises at least one of polymethyl acrylate, polyethyl acrylate and polybutyl acrylate. (6) The present invention provides the thermoplastic resin composition according to any one of the above (1) to (5), wherein the acrylic non-graft polymer is contained in an amount of 0.10 parts by weight to 1.00 parts by weight relative to 100 parts by weight of the base resin. (7) The present invention provides the thermoplastic resin composition according to any one of the above (1) to (6), wherein the recycled resin comprises at least one selected from the group consisting of recycled polyethylene, recycled polypropylene, recycled polyester, recycled polystyrene, recycled polyamide, recycled polycarbonate, recycled diene-based graft polymer and recycled vinyl-based non-graft polymer. (8) The present invention provides the thermoplastic resin composition according to any one of the above (1) to (7), wherein the primary diene-based graft polymer comprises a diene-based rubber polymer, and a shell comprising a vinyl cyanide-based monomer unit and a vinyl aromatic