Resin Composition High Blackness Heat Resistance
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Solution Overview
Problem
Conventional heat-resistant ASA resins used in automobile exterior materials face limitations in achieving high blackness due to inferior dye compatibility and compromised heat resistance when attempting to enhance impact resistance and flowability.
Innovation Solution
A resin composition comprising a graft copolymer and a matrix copolymer, where the graft copolymer includes acrylic polymers with specific particle diameters and monomer units, and the matrix copolymer includes alkyl-substituted aromatic vinyl-based monomers, alkyl (meth)acrylate monomers, and vinylcyan-based monomers, optimized to achieve high blackness, heat resistance, and impact resistance without the need for a separate painting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat-resistant ASA resins are used to maintain heat resistance, then heat resistance is preserved, but dye compatibility is inferior and high blackness cannot be achieved
Solution Approach 1:
The invention uses a composite resin system comprising ASA resin as the base polymer, PMMA resin as a modifier, and specifically controlled carbon black pigment. This composite approach allows the ASA resin to provide heat resistance while PMMA enhances dye compatibility and carbon black achieves high blackness, resolving the contradiction between heat resistance and coloring performance
Solution Approach 2:
The invention changes the parameters of the resin composition by controlling the glass transition temperature (Tg) of the ASA resin within 90-110°C and the weight ratio of PMMA to ASA within 5-20 parts. These parameter optimizations enable the material to simultaneously achieve heat resistance, impact resistance, and high blackness without compromising dye compatibility
2Manufacturing precision
If ASA resin composition is modified to achieve high blackness, then dye compatibility improves, but heat resistance becomes weak
Solution Approach 1:
The invention applies local quality by using different resin components for different functions: ASA resin provides the heat resistance backbone, while PMMA resin specifically enhances dye compatibility and blackness. This functional differentiation allows each component to optimize its local contribution without compromising the overall heat resistance of the composition
3Manufacturing precision
If PMMA-based resin is added to ASA resin to improve heat resistance and blackness, then dye compatibility improves, but impact resistance becomes weak
Solution Approach 1:
The invention optimizes the weight ratio parameter of PMMA to ASA within 5-20 parts, which balances the competing requirements. This controlled proportion ensures that PMMA enhances dye compatibility and heat resistance without exceeding the threshold that would compromise impact resistance, maintaining the toughness of the ASA resin matrix
Data Source
AI summary
The present disclosure relates to a resin composition and relates to a resin composition having excellent heat resistance and impact resistance and accomplishing the high degree of blackness.