Amine-Free Non-Stick Coating Composition With Low-Yellowing Adhesion

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Solution Overview

Problem

Existing non-stick coating compositions for cooking tools and household appliances face challenges with adhesion, corrosion resistance, and yellowing, particularly due to the use of harmful polar aprotic solvents and amine-based formulations that compromise film formation and increase environmental and health risks.

Innovation Solution

Development of an aqueous, amine-free coating composition with heterocyclic polymers in powder form, featuring a particle size of less than 20 μm, and a reduced use of non-toxic polar aprotic solvents, combined with aromatic polymers to enhance heat resistance and minimize yellowing, while using a process that includes grinding and mixing to achieve optimal particle distribution and solvent content.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If heterocyclic polymer resins are used in solution in polar aprotic solvents (NEP or NMP) to improve adhesion, then adhesion performance is improved, but environmental and health risks increase due to toxic solvents

Engineering Contradiction:

ImproveadhesionVSAvoidtoxic solvent exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts and removes the toxic polar aprotic solvents (NEP, NMP) from the formulation by using alternative adhesive resins that can be dissolved in water or alcohol, thereby eliminating the harmful factors while maintaining adhesion functionality

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the solvent parameter from toxic polar aprotic solvents to water or alcohol, which are less harmful, while adjusting the resin composition to maintain or improve adhesion performance in the new solvent system

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If salt is added to form from acid groups and water is added to invert phase to create aqueous formulation, then aqueous compatibility is improved, but film formation deteriorates due to opened imide cycles

Engineering Contradiction:

Improveaqueous compatibilityVSAvoidfilm formation

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent removes the salt-forming step that opens imide cycles, instead using adhesive resins that maintain their cyclic structure in aqueous environments, thereby preserving film formation while achieving aqueous compatibility

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses alternative adhesive resins that are designed to work in aqueous systems without requiring salt formation, accepting a different chemical pathway that achieves the same functional goal of aqueous compatibility

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If amine-based formulations are used to improve adhesion, then adhesion is improved, but yellowing increases during coating production

Engineering Contradiction:

ImproveadhesionVSAvoidyellowing

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and removes amine-based formulations from the system, replacing them with alternative adhesive resins that do not cause yellowing, thereby maintaining adhesion while eliminating the harmful yellowing effect

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses adhesive resins that naturally provide adhesion without the side effect of yellowing, converting the formulation approach to achieve both adhesion and color stability simultaneously

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

4Stability of the object's composition

If heterocyclic polymer powder with d90 ≤ 20 μm is used to reduce sedimentation, then coating uniformity is improved, but manufacturing complexity increases due to grinding requirements

Engineering Contradiction:

Improvesedimentation resistanceVSAvoidgrinding process complexity

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent performs preliminary grinding of heterocyclic polymer powder to achieve the required d90 ≤ 20 μm particle size before formulation, so that the powder is ready for direct mixing without requiring complex inline grinding equipment or multiple processing steps

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10465076B2Aqueous semi-finished and primary non-stick coating compositions comprising heterocyclic polymers

Publication Date: 2019.11.05 SEB SA

AI summary

Provided is an aqueous amine-free coating composition including at least one heterocyclic polymer, wherein the heterocyclic polymer is in the form of powder having a d90 less than or equal to 20 μm. Also provided is an aqueous amine-free non-stick coating composition including such an aqueous composition for a coating, and the respective methods for producing same. Further provided is a method for producing an item on one of the faces of a metal substrate, from at least one layer of coating composition or one layer of non-stick coating composition according to the invention.