Allylic Polymer Resin Adhesion to Plastic Substrates
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Solution Overview
Problem
Conventional photocurable resin compositions, particularly those containing diallyl phthalate resins, face challenges with adhesion to plastic substrates such as polypropylene (PP) and polyethylene terephthalate (PET), which limits their application in inks and coating materials.
Innovation Solution
A photocurable resin composition featuring an allylic polymer produced by polymerizing an allylic compound with a specific structure, such as diallyl 1,2-cyclohexanedicarboxylate, which exhibits excellent adhesion to plastic substrates, including PP, and can be combined with an ethylenically unsaturated compound and a photopolymerization initiator for improved drying properties and coating workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If diallyl phthalate resins are used in photocurable resin compositions, then the composition can be cured quickly by light exposure, but the adhesion to plastic substrates becomes insufficient
Solution Approach 1:
The patent changes the chemical parameters of the resin composition by replacing conventional diallyl phthalate resins with allyl esters of alicyclic dicarboxylic acids (specifically compounds of formula (I) where X is an alicyclic compound). This parameter change in the molecular structure resolves the adhesion problem while maintaining the photocurable properties, allowing the composition to achieve both fast curing and excellent adhesion to plastic substrates like PP and PET
Solution Approach 2:
The patent creates a composite photocurable resin composition that combines allyl esters of alicyclic dicarboxylic acids with specific photopolymerization initiators and optional co-monomers. This composite formulation achieves synergistic effects where the allyl ester provides adhesion and the photopolymerization system provides fast curing, resolving the contradiction between adhesion and cure rate
2Device complexity
If conventional photocurable resin compositions are used, then the formulation is simple, but the adhesion to polypropylene and polyethylene terephthalate substrates is poor
Solution Approach 1:
The patent modifies the chemical composition parameters by introducing allyl esters of alicyclic dicarboxylic acids with specific structural features (formula (I) where n is 3 or 4 and X is an alicyclic compound). This targeted parameter change in the resin component achieves excellent adhesion to difficult substrates like PP and PET while keeping the overall formulation relatively simple and suitable for industrial applications
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 demonstrates superior adhesion to plastic substrates, particularly PP, and maintains excellent drying properties, making it suitable for use in inks and coating materials, overcoming the adhesion issues faced by conventional diallyl phthalate resin compositions.
Implementation Method 1
a photocurable resin composition containing an allylic polymer (A) produced by polymerization of an allylic compound having a specific structure
Implementation Method 2
a photocurable resin composition containing an allylic polymer (A) which has excellent adhesion to plastic substrates
Data Source
AI summary
Provided is a photocurable resin composition containing an allylic polymer (A) which has excellent adhesion to plastic substrates. The present invention relates to a photocurable resin composition containing an allylic polymer (A), the allylic polymer (A) being produced by polymerization of an allylic compound represented by the following formula (I):