Polyester Coating Crystal Stereo-Pattern Weather Resistance
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Solution Overview
Problem
Conventional PVC coatings on metal products form stereo-patterns with poor weather resistance and are prone to plasticizer migration, leading to environmental pollution, necessitating a regulatory ban in many countries.
Innovation Solution
A coating composition comprising polyester, a curing agent, a curing catalyst mixture with varying curing rates, a composite solvent with solvents of different dissolving powers, and an incompatible wax, which forms a crystal-like stereo-pattern on metal products, providing improved durability and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PVC coating is applied to form stereo-pattern, then stereo-pattern is formed, but weather resistance is poor and plasticizer migration causes environmental pollution
Solution Approach 1:
The patent changes the chemical composition parameters by replacing PVC with polyester as the base resin and using specific curing agents and catalysts. This fundamental material substitution eliminates plasticizer migration while maintaining stereo-pattern formation capability, directly resolving the environmental pollution and weather resistance issues
Solution Approach 2:
The patent employs a composite coating system consisting of polyester, curing agent, curing catalyst, composite solvent, and wax. This multi-component composite material achieves both the desired stereo-pattern formation and improved weather resistance while eliminating harmful plasticizer migration, thereby resolving the technical contradiction
2Shape
If curable coating composition with composite solvent and wax is used, then embossment-like texture is formed, but the pattern type is limited and weather resistance needs improvement
Solution Approach 1:
The patent modifies the curing parameters by introducing a curing catalyst mixture with at least two different catalysts that provide different curing rates. This enables crystal-like stereo-pattern formation with enhanced weather resistance, improving upon the previous embossment-like texture while maintaining the composite solvent and wax system
Solution Approach 2:
The patent introduces dynamic control of the curing process through multiple catalysts with different curing rates. This dynamic curing approach allows for the formation of crystal-like patterns with superior weather resistance, evolving from the static embossment-like texture of prior art
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 solution achieves a crystal-like stereo-pattern with enhanced mechanical, chemical, and weather resistance, meeting commercial requirements and avoiding environmental concerns associated with PVC coatings.
Implementation Method 1
a curing catalyst mixture including at least two curing catalysts to provide different curing rates for curing the polyester
Implementation Method 2
a wax incompatible with the polyester
Implementation Method 3
a composite solvent including at least two solvents having different dissolving powers for the polyester
Data Source
AI summary
A coating composition capable of forming a crystal-like stereo-pattern includes: a polyester; a curing agent for curing the polyester; a curing catalyst mixture including at least two curing catalysts to provide different curing rates for curing the polyester; a composite solvent including at least two solvents having different dissolving powers for the polyester; and a wax incompatible with the polyester. A metal product having the stereo-pattern formed thereon is also disclosed.