BPA-Free Radiation Curable Chlorinated Polyester Composition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiation curable compositions used in food packaging and coatings often contain Bisphenol A (BPA), which raises health concerns due to potential toxicity and migration of residues into food. There is a need for BPA-free alternatives that maintain performance and safety standards.
Innovation Solution
A radiation curable composition comprising a chlorinated polyester component prepared from a polyol component free of BPA derivatives and cyclic ether polyols, and a polycarboxylic acid component with chlorine groups, along with a radiation curable component having ethylenically unsaturated groups. This composition is designed to provide excellent adhesion, low viscosity, and resistance to oxygen inhibition while being free of BPA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If BPA-based polymers are used in food packaging, then manufacturing ease and performance are improved, but health safety deteriorates due to potential toxicity and migration of BPA residues into food
Solution Approach 1:
The invention changes the chemical composition parameters by selecting specific polyol types (cyclic ether polyols, aliphatic polyols) and polyisocyanate combinations that achieve the desired balance between adhesion, flexibility, and BPA-free status. The molecular weight and hydroxyl value parameters are optimized to maintain performance while eliminating harmful substances
2Speed
If existing radiation curable compositions are used, then curing speed and adhesion are improved, but BPA content increases causing health concerns
Solution Approach 1:
The invention creates composite radiation curable compositions combining polyurethane acrylates derived from alternative polyols with photoinitiators and other additives. This composite approach achieves both fast UV curing and BPA-free status, suitable for food packaging applications
3Strength
If cyclic ether polyols are used in polyester preparation, then adhesion properties are improved, but yellowing and poor mechanical properties occur
Solution Approach 1:
The invention changes the polyol composition parameters to control yellowing and adhesion properties. By adjusting the ratio of cyclic ether polyols to alternative polyols and optimizing molecular weight and hydroxyl value, the formulation achieves the desired balance between adhesion performance and color stability
4Object-affected harmful factors
If BPA-free alternatives are developed, then health safety is improved, but adhesion on plastics and mechanical properties may deteriorate
Solution Approach 1:
The invention optimizes parameters such as polyol molecular weight, hydroxyl value, and polyisocyanate ratio to achieve optimal adhesion on plastic substrates while maintaining BPA-free status. The formulation parameters are tuned to ensure sufficient mechanical strength and bonding performance without compromising health safety
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 proposed composition achieves BPA-free status, offering improved adhesion on plastics, low migration properties suitable for food packaging, and enhanced mechanical properties post-curing, thus addressing health concerns and performance requirements.
Implementation Method 1
Radiation curable compositions are used in many different applications including food packaging products
Data Source
AI summary
The present invention relates to a radiation curable composition comprising: (I) A radiation curable component comprising a compound having at least one ethylenically unsaturated group and (II) A chlorinated polyester component that is prepared from (A) A polyol component which is substantially free of any Bisphenol A derivative compound and which is substantially free of any cyclic ether polyol compound, said polyol component comprising a polyol compound (Ai) which is cyclic and which has at least two hydroxyl groups, and (B) A polycarboxylic acid component comprising a compound (Bi) having at least one chlorine group and at least two carboxyl groups, (C) optionally at least one monoalcohol compound, (D) optionally at least one monocarboxylic acid compound, (III) optionally at least one polycarboxylic acid compound substantially free of chlorine groups.