Thermoplastic resin composition and molded body containing same
Solution Overview
Problem
Existing thermoplastic resins, such as ABS and polycarbonate, face limitations in heat and impact resistance, which restrict their use in applications requiring high mechanical strength and thermal stability, particularly in electric vehicles where weight reduction is essential to enhance driving range and fuel economy.
Innovation Solution
A thermoplastic resin composition comprising 40 to 80 wt% polycarbonate resin, 1 to 20 wt% polycarbonate-polysiloxane copolymer, 5 to 30 wt% aromatic polyester resin, 1 to 20 wt% graft copolymer, 5 to 30 wt% inorganic filler, 0.01 to 1 wt% organophosphate ester compound, and 1 to 5 wt% vinyl-based copolymer, which enhances dimensional stability and thermal deformation resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the thickness of molded body is reduced to reduce weight, then weight is reduced, but thermal deformation resistance deteriorates
Solution Approach 1:
The patent uses a composite resin composition comprising polycarbonate resin, aromatic polyester resin, and inorganic filler. The aromatic polyester resin (5-30 wt%) provides thermal stability and dimensional resistance, while the inorganic filler (5-30 wt%) enhances heat resistance and reduces thermal deformation. This composite structure allows thinner molded bodies to maintain adequate thermal deformation resistance despite weight reduction.
2Strength
If ABS resin is used to achieve excellent mechanical strength and moldability, then mechanical strength and moldability are improved, but heat and impact resistance are insufficient
Solution Approach 1:
The patent replaces pure ABS resin with a composite system where polycarbonate resin (40-80 wt%) provides impact resistance and heat resistance, aromatic polyester resin (5-30 wt%) enhances thermal stability, and inorganic filler (5-30 wt%) improves heat resistance. This composite structure maintains mechanical strength while significantly improving heat and impact resistance compared to ABS resin.
Solution Approach 2:
The patent modifies the resin composition by introducing aromatic polyester resin and inorganic filler into the polycarbonate matrix. These parameter changes in composition enable the material to achieve both mechanical strength and heat resistance, overcoming the limitations of ABS resin which lacks sufficient thermal stability.
3Temperature
If polycarbonate resin is used to achieve excellent heat and impact resistance, then heat and impact resistance are improved, but moldability and impact resistance at low temperatures are poor
Solution Approach 1:
The patent combines polycarbonate resin (40-80 wt%) with aromatic polyester resin (5-30 wt%) and inorganic filler (5-30 wt%). The aromatic polyester component improves low-temperature impact resistance and moldability, while the inorganic filler enhances heat resistance. This composite structure resolves the contradiction between heat resistance and low-temperature processability.
Data Source
AI summary
A thermoplastic resin composition and a molded body containing the same are disclosed. The resin composition can obtain good dimensional stability and thermal deformation resistance at high temperatures by the introduction of an inorganic filler and an aromatic polyester into a polycarbonate resin and a polycarbonate-polysiloxane copolymer. The resin composition includes: 40 to 80 weight percent (wt %) of a polycarbonate resin; 1 to 20 wt % of a polycarbonate-polysiloxane copolymer resin; 5 to 30 wt % of an aromatic polyester resin; 1 to 20 wt % of a graft copolymer resin in which a rubbery polymer, an aromatic vinyl monomer, and a vinyl cyanide monomer are polymerized through graft polymerization; 5 to 30 wt % of an inorganic filler; 0.01 to 1 wt % of an organophosphate ester compound; and 1 to 5 wt % of a vinyl-based copolymer resin.