Biomass Polyurethane Housing Coating for Faster Drying and Adhesion
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Solution Overview
Problem
Biomass polyurethane coatings have slow drying times due to long carbon chains, leading to reduced adhesion and durability of the coating layer on polymer substrates, which can be exacerbated by prolonged drying times.
Innovation Solution
A housing structure comprising a polymer substrate with a primer layer, a color layer, and a coating layer, all made from biomass polyurethane resin, with a glass transition temperature of 80° C. to 110° C., to enhance adhesion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If biomass polyurethane resin is used as coating material, then eco-friendliness and sustainability are improved, but drying speed deteriorates due to long carbon chains
Solution Approach 1:
The patent modifies the molecular structure of biomass polyurethane by controlling the glass transition temperature (Tg) to be 80°C to 110°C, which optimizes the carbon chain characteristics. This parameter change enables the coating to maintain eco-friendliness while achieving appropriate drying speed and film formation properties that prevent adhesion degradation.
Solution Approach 2:
The patent creates a composite coating system using biomass polyurethane resin with specifically controlled Tg characteristics. The resin formulation combines renewable resources with optimized molecular weight and Tg parameters to achieve both environmental sustainability and practical drying performance, resolving the contradiction between eco-friendliness and drying speed.
2Loss of time
If drying time is prolonged to allow biomass polyurethane to dry, then complete drying is achieved, but adhesion between polymer substrate and coating layer deteriorates
Solution Approach 1:
By controlling the glass transition temperature to 80°C to 110°C, the patent optimizes the drying kinetics of the biomass polyurethane coating. This Tg range ensures that the coating achieves adequate drying speed without requiring excessive drying time, thereby preventing adhesion degradation between the coating layer and polymer substrate while still allowing complete drying.
3Object-generated harmful factors
If petroleum-derived polyurethane is replaced with biomass polyurethane, then environmental sustainability is improved, but coating durability deteriorates due to slow drying
Solution Approach 1:
The patent optimizes the glass transition temperature of biomass polyurethane to 80°C to 110°C, which directly impacts coating durability. This parameter control ensures that the coating forms a proper film structure during drying, preventing the durability deterioration that would otherwise result from slow drying, while maintaining the environmental benefits of biomass materials.
Solution Approach 2:
The patent develops an optimized biomass polyurethane resin system with controlled molecular weight, Tg, and composition. This composite material approach combines renewable resources with carefully tuned properties to achieve both environmental sustainability and coating durability, overcoming the limitations of conventional biomass polyurethane applications.
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 housing structure provides improved adhesion and durability while reducing greenhouse gas emissions and facilitating recycling, with a faster drying process and enhanced physical properties.
Implementation Method 1
adhesion between the polymer substrate and the coating layer may be degraded
Data Source
AI summary
A housing of an electronic device including polymer materials is provided. The housing includes a polymer substrate, a primer layer disposed on at least a portion of the polymer substrate, a color layer disposed on the primer layer, and a coating layer disposed on the color layer. The primer layer, the color layer, and the coating layer include a biomass polyurethane resin and have a glass transition temperature of 80° C. to 110° C.