Polyester polymer and polyester-based heat resistant coating for cookware or bakeware
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Solution Overview
Problem
Current heat-resistant coatings for cookware and bakeware are often brittle, prone to crack-based defects, and rely on fluoropolymers or non-aqueous solvents, which are environmentally regulated or pose environmental concerns.
Innovation Solution
A water-based polyester polymer coating composed of a diol, polyol, terephthalic acid, and isophthalic acid, with a specific molar ratio, providing heat resistance, flexibility, and non-stick properties, formulated without fluoropolymers or hazardous solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fluoropolymer-based heat resistant coatings are used, then heat resistance is improved, but environmental compliance deteriorates due to strict regulations on fluoropolymers
Solution Approach 1:
The patent removes fluoropolymers from the coating formulation entirely, extracting the harmful substance while maintaining the heat resistance function through alternative polyester polymer chemistry. The coating achieves heat resistance without relying on regulated fluoropolymer components.
Solution Approach 2:
The patent changes the chemical composition parameters by using specific polyester polymers with controlled molecular weights (5,000-50,000 Daltons) and acid values (20-65), replacing fluoropolymer-based formulations. This parameter change enables heat resistance while achieving environmental compliance.
2Temperature
If conventional heat resistant coatings are used, then heat resistance is improved, but flexibility deteriorates causing brittleness and crack-based defects
Solution Approach 1:
The patent optimizes the polyester polymer parameters including molecular weight (5,000-50,000 Daltons) and acid value (20-65), along with the molar ratio of terephthalic acid to isophthalic acid (0.6:1.0 to 0.9:1.0), to achieve a balance between heat resistance and flexibility that prevents brittleness and cracking.
Solution Approach 2:
The patent uses a composite polyester polymer system combining dicarboxylic acids (terephthalic acid and isophthalic acid) with diols and polyols to create a coating material that integrates both heat resistance and flexibility properties within a single polymer matrix.
3Ease of operation
If non-aqueous solvents like NMP are used in coating formulations, then coating performance is improved, but environmental compliance deteriorates due to strict regulations
Solution Approach 1:
The patent removes non-aqueous solvents such as NMP from the coating formulation and replaces them with water-based solvent systems, eliminating the harmful substance while maintaining coating application performance and environmental compliance.
4Temperature
If polyester polymer with high molecular weight is used, then heat resistance is improved, but flexibility deteriorates causing brittleness
Solution Approach 1:
The patent optimizes the molecular weight parameter of the polyester polymer to fall within the specific range of 5,000-50,000 Daltons. This parameter optimization ensures the polymer chains are long enough to provide heat resistance but not so long as to cause excessive brittleness, maintaining flexibility.
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 coating achieves high heat resistance, flexibility, and non-stick performance while avoiding environmental hazards, maintaining integrity and aesthetic appeal.
Implementation Method 1
a polyester polymer polymerized from an alcohol component including a diol and a polyol and an acid component including terephthalic acid and isophthalic acid
Implementation Method 2
a coating on the substrate, the coating including polyester and having at least one of: a glass transition temperature of at least 80°C, a pencil hardness of at least 2H at a temperature of 400°F
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A polyester polymer is polymerized from an alcohol component including a diol and a polyol and an acid component including terephthalic acid and isophthalic acid, with the terephthalic acid and isophthalic acid present in a desired molar ratio. The polyester polymer also includes carboxylic acid functional groups, a weight average molecular weight (MW) of at least 5000 Daltons (Da), and an acid value (AV) of 40 to 65. The polyester polymer may be formulated into a water-based coating composition for substrates such as articles of cookware to form a coating that is highly heat resistant and flexible while also providing non-stick properties with good release.