Automotive Interior Resin Composition Against Hydrolysis Degradation
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Solution Overview
Problem
Conventional automobile interior materials face issues with hydrolysis in high-temperature and high-humidity environments, leading to deteriorated physical properties, particularly when polycarbonate (PC) resin is mixed with polybutylene terephthalate (PBT) resin due to transesterification reactions.
Innovation Solution
A composite resin composition comprising specific ratios of polycarbonate, polybutylene terephthalate, and polyethylene terephthalate resins, along with a hydrolysis stabilizer containing polyorganosiloxane-polycarbonate resin, (meth)acrylate compound-conjugated diene compound-aromatic vinyl compound copolymer, dialkyl phthalate compound, and carboxy-reactive epoxy resin, which enhances heat resistance and hydrolysis resistance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polycarbonate (PC) resin is mixed with polybutylene terephthalate (PBT) resin to improve physical properties, then mechanical strength is improved, but hydrolysis resistance deteriorates due to transesterification reaction
Solution Approach 1:
A hydrolysis stabilizer comprising a specific copolymer (containing (meth)acrylate compound, conjugated diene compound, and aromatic vinyl compound) is introduced as an intermediary substance to prevent the harmful transesterification reaction between PC and PBT resins. The stabilizer acts as a mediator that protects the material system from degradation while allowing the beneficial mechanical properties to be maintained.
Solution Approach 2:
The invention creates a multi-component composite material system that combines PC resin, PBT resin, and a specifically designed hydrolysis stabilizer copolymer. This composite approach allows the system to simultaneously achieve improved mechanical strength from the PC-PBT mixture while the stabilizer component prevents hydrolysis, resolving the contradiction between strength and reliability.
2Strength
If conventional composite resin materials are used to ensure physical properties, then mechanical strength is maintained, but heat resistance and hydrolysis resistance stability are insufficient
Solution Approach 1:
The invention changes the chemical composition parameters of the stabilizer component, specifically using a copolymer with (meth)acrylate compound (1-20 parts), conjugated diene compound (70-85 parts), and aromatic vinyl compound (1-20 parts) in defined ratios. This parameter optimization ensures the stabilizer provides adequate heat resistance while maintaining mechanical properties.
3Reliability
If material composition is optimized for heat resistance and hydrolysis resistance, then product reliability is improved, but the balance between mechanical properties and fluidity may be compromised
Solution Approach 1:
The invention optimizes the concentration parameters of each component in the hydrolysis stabilizer copolymer to achieve the desired balance. The specific formulation with (meth)acrylate compound (1-20 parts by weight), conjugated diene compound (70-85 parts by weight), and aromatic vinyl compound (1-20 parts by weight) provides both reliability and manufacturability by controlling the chemical structure and molecular weight characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite resin composition provides improved mechanical properties, fluidity, and appearance, ensuring excellent product reliability and reducing production costs, without the need for painting, while maintaining balance between physical properties.
Implementation Method 1
these materials may cause hydrolysis in a high-temperature and high-humidity environment to deteriorate physical properties
Implementation Method 2
when a polycarbonate (PC) resin is mixed with a polybutylene terephthalate (PBT) resin, physical properties are decreased due to transesterification reaction
Implementation Method 3
heat resistance and hydrolysis resistance stability are improved
Data Source
AI summary
A composite resin composition for automobile interior products and an automobile interior product manufactured using the same are disclosed. More particularly, raw materials included in the composite resin composition for automobile interior products are optimized so that heat resistance and hydrolysis resistance stability are improved. Accordingly, the balance between physical properties such as mechanical properties and fluidity is satisfied and excellent product reliability and appearance can be provided.