Polyester Coatings from Aryloxy Ether Polyols for Food Containers

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing polyester-based coatings for food and beverage containers face challenges in achieving a balance between corrosion resistance, flexibility, and fabrication properties, with many formulations either lacking sufficient corrosion resistance or exhibiting poor flexibility and crazing.

Innovation Solution

The development of a coating composition comprising a polyester polymer derived from the esterification of aryloxy ether polyols, which are formed by reacting polyhydric phenols or monophenols with cyclic carbonates, combined with a crosslinker and optional catalyst, to create a coating that balances adhesion, corrosion resistance, and flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If polyester-based coatings are formulated to improve corrosion resistance, then corrosion protection is enhanced, but flexibility and fabrication properties deteriorate

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidflexibility and fabrication properties

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent modifies the chemical composition parameters of polyester coatings by incorporating specific additives and adjusting resin ratios to achieve optimal balance between corrosion resistance and flexibility. This involves changing the molecular structure and crosslinking density of the polyester matrix to simultaneously improve protective properties and workability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates composite coating systems by combining polyester resins with complementary materials such as flexible polymers, adhesion promoters, and functional additives. This composite approach allows the coating to exhibit both enhanced corrosion resistance and improved flexibility/fabrication properties that neither component could achieve alone.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If polyester-based coatings are formulated to improve flexibility, then fabrication properties are enhanced, but corrosion resistance deteriorates

Engineering Contradiction:

ImproveflexibilityVSAvoidcorrosion resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent adjusts the chemical composition parameters by controlling the ratio of flexible to rigid polymer components, modifying crosslinking density, and selecting specific polyester resin types to achieve optimal balance between flexibility and corrosion resistance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention employs composite formulations that integrate flexible polymer matrices with corrosion-inhibiting additives and protective pigments, creating a multi-functional coating system that delivers both flexibility and corrosion protection.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If coatings are designed to meet food contact safety requirements, then health safety is improved, but performance characteristics such as adhesion and durability may deteriorate

Engineering Contradiction:

Improvefood contact safetyVSAvoidadhesion and durability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent employs coating formulations that use food-safe, non-toxic materials which can be applied in thinner, multi-layer systems. Each layer provides specific functionality (adhesion, barrier, flexibility) allowing the use of safer, less durable individual components that collectively achieve the required performance.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention creates multi-component composite coatings where food-safe polymers are combined with approved additives, adhesion promoters, and protective pigments to achieve both safety and performance requirements simultaneously.

Inventive Principle:

Principle #40Composite materials

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 resulting coating composition provides enhanced corrosion resistance, flexibility, and improved fabrication properties, making it suitable for food-contact surfaces while minimizing the use of bisphenol A and epoxy compounds.

Implementation Method 1

a polyester polymer derived by esterifying an aryloxy ether polyol (e.g., an aryloxy ether diol) derived from reaction between: (i) a polyhydric phenol or a polyphenol and a non-hydroxyl functional cyclic carbonate, or (ii) a monophenol and a hydroxyl functional cyclic carbonate

Methodology Applied

Scientific EffectEsterification: Chemical Bonding

Data Source

PatentUS12187912B2Polyester coating compositions containing polymers derived from cyclic carbonates

Publication Date: 2025.01.07 SWIMC LLC

AI summary

A coating composition is provided that includes (a) a polyester polymer derived by esterifying an aryloxy ether polyol (e.g., an aryloxy ether diol) derived from reaction between a polyhydric phenol or a polyphenol and a non-hydroxyl functional cyclic carbonate, or from reaction between a monophenol and a hydroxyl functional cyclic carbonate; (b) a crosslinker and (c) an optional catalyst.