UV-Curable Polyester Resin Composition for Hot Water and Alkali Adhesion
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Solution Overview
Problem
Existing active energy ray curing compositions fail to maintain adhesion and durability under extreme conditions such as immersion in hot water or alkali solutions, which is crucial for applications like beverage containers.
Innovation Solution
Incorporating a polymerizable monomer with a phosphoric acid ester group and a polyester resin with an unsaturated bond into the curing composition enhances adhesion and durability by improving interaction with substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active energy ray curing compositions are used, then the composition can be cured quickly on non-permeating substrates, but the cured matter lacks durability under extreme conditions such as hot water or alkali solution treatment
Solution Approach 1:
The patent uses a composite resin system combining polyester resin with unsaturated bonds and polymerizable monomers containing phosphoric acid ester groups. This composite material structure provides both rapid curability and exceptional durability under extreme conditions, resolving the contradiction between curing speed and reliability.
Solution Approach 2:
The patent optimizes the molecular weight of polyester resin to 3,000 or less and carefully controls the ratio of phosphoric acid ester group-containing monomer (5-30 mass%) to achieve the desired balance between curing characteristics and extreme condition resistance, demonstrating parameter optimization to resolve the technical contradiction.
2Strength
If the composition uses higher molecular weight polyester resin to improve adhesion, then substrate bonding may improve, but the curing speed and final adhesion strength under extreme conditions decrease
Solution Approach 1:
The patent specifies using polyester resin with number average molecular weight of 3,000 or less, which provides adequate adhesion while maintaining fast curing speed and high final strength under extreme conditions, resolving the contradiction between adhesion strength and curing speed.
Solution Approach 2:
The patent introduces phosphoric acid ester groups at specific locations in the molecular structure to provide localized strong bonding sites on substrate surfaces, achieving high adhesion strength without requiring high molecular weight polyester resin, thus maintaining fast curing speed.
3Strength
If the composition is formulated for maximum adhesion to substrates, then substrate bonding improves, but resistance to hot water and alkali solutions deteriorates
Solution Approach 1:
The patent creates a composite resin system where polyester resin provides substrate adhesion while phosphoric acid ester group-containing monomers provide chemical resistance through their stable molecular structure, achieving both strong adhesion and resistance to hot water/alkali simultaneously.
Solution Approach 2:
The phosphoric acid ester groups act as intermediary bonding sites that strongly attach to substrate surfaces while the polyester resin matrix provides resistance to hot water and alkali, mediating between adhesion requirements and chemical resistance requirements.
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 composition maintains strong adhesion and resistance to hot water and alkali solutions, ensuring durability of the cured matter.
Implementation Method 1
an active energy ray curing composition which contains a polymerizable monomer having a phosphoric acid ester group and a polyester resin having an unsaturated bond and a number average molecular weight of 3,000 or less
Data Source
AI summary
An active energy ray curing composition contains a polymerizable monomer having a phosphoric acid ester group and a polyester resin having an unsaturated bond and a number average molecular weight of 3,000 or less.