Conductive PBT Resin Composition for Water-Based Coating Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The application of a water-based coating material to molded bodies made from polybutylene terephthalate resin and conductive carbon results in low adhesion, leading to easy peeling-off of the coating material.
Innovation Solution
A resin composition is developed by blending elastomer, hydroxy group-containing compound, and conductive carbon into polybutylene terephthalate resin in specific proportions, enhancing adhesion with water-based coating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-based coating material is applied to molded bodies made from polybutylene terephthalate resin and conductive carbon, then the coating process can be performed, but the adhesion between the molded body and coating material is low, causing easy peeling-off
Solution Approach 1:
The patent applies composite materials by combining polybutylene terephthalate resin with conductive carbon particles and specific additives to create a multi-component resin composition. This composite structure provides both the base resin properties and enhanced coating adhesion through the synergistic effects of different components, directly resolving the adhesion problem while maintaining electrical conductivity.
Solution Approach 2:
The patent changes the chemical and physical parameters of the resin composition by controlling the particle size, content, and distribution of conductive carbon particles, as well as the molecular weight and functional groups of the polybutylene terephthalate resin. These parameter adjustments optimize both the coating adhesion and electrical conductivity of the molded body.
Data Source
AI summary
To provide a resin composition and a molded body. The resin composition contains 2 to 15 parts by mass of an elastomer, 3 to 20 parts by mass of a hydroxy group-containing compound, and 3 to 20 parts by mass of conductive carbon, relative to 100 parts by mass of resin components including polybutylene terephthalate resin, wherein the hydroxy group-containing compound has a concentration of hydroxy group as proportion of the peak area derived from hydroxy group relative to the whole peak area in 1H NMR analysis [(Peak area derived from hydroxy group/Whole peak area)×100] in the range of 0.5 to 15.0%.