Active Energy Ray-Curable Composition Viscosity Control
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Solution Overview
Problem
Conventional active energy ray-curable resin compositions have high viscosity due to intermolecular interactions, requiring solvent dilution, which affects coating workability and film productivity, and while reducing solvent usage improves workability, it compromises curing rate and film performance.
Innovation Solution
A composition combining a specific polyfunctional compound with an unsaturated double bond and another polymerizable compound at a specific ratio, achieving suitable viscosity and curing rate, with a mass ratio of 30/70 to 50/50, resulting in excellent optical properties, adhesion, and hardness in the cured film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active energy ray-curable resin composition is used, then good coating film performance (scratch resistance, adhesion, solvent resistance) can be obtained, but viscosity is high due to intermolecular interaction, requiring solvent dilution which reduces coating workability and film productivity
Solution Approach 1:
The patent changes the chemical structure parameters of the polyfunctional compound by introducing a specific cyclic carbonate structure with particular ring size and substitution patterns. This structural modification alters the intermolecular interaction characteristics, reducing viscosity while preserving the curing performance and film properties
Solution Approach 2:
The patent creates a composite resin composition by combining the specifically structured polyfunctional compound (cyclic carbonate with unsaturated double bond) with other compatible resin components. This composite approach achieves synergistic effects where the unique molecular structure provides low viscosity and good reactivity, while the composite formulation maintains excellent coating film performance
2Ease of operation
If active energy ray-curable composition is diluted with organic solvent to adjust viscosity, then coating workability improves, but environmental and health adverse effects increase
Solution Approach 1:
The patent extracts and eliminates the need for organic solvents by incorporating a polyfunctional compound with inherent low viscosity characteristics. The specific cyclic carbonate structure with unsaturated double bonds provides molecular mobility and reduced intermolecular attraction, allowing the composition to achieve suitable coating viscosity without any solvent dilution
Solution Approach 2:
The polyfunctional compound serves dual functions: it acts as both the curing agent and the viscosity modifier. The molecular structure inherently provides the necessary flow characteristics for coating application while maintaining reactivity for crosslinking, eliminating the need for separate solvent components
3Ease of operation
If amount of organic solvent is reduced to improve coating workability, then viscosity is reduced, but curing rate and coating film performance (optical properties, hardness, adhesion) become unsatisfactory
Solution Approach 1:
The patent modifies the chemical parameters of the polyfunctional compound by introducing a cyclic carbonate structure with specific ring constraints and unsaturated double bonds. This structural change enhances reactivity toward crosslinking while the molecular geometry reduces intermolecular attraction, achieving both low viscosity and high curing performance simultaneously
Solution Approach 2:
The patent formulates a composite resin system where the specifically structured polyfunctional compound works synergistically with other resin components. The unique molecular structure provides both the flow characteristics needed for coating and the chemical reactivity required for complete crosslinking, ensuring excellent curing rate and film performance without solvent dilution
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 achieves a suitable viscosity for coating and a sufficient curing rate, enhancing coating film performance in terms of optical properties, adhesion, and hardness, while minimizing solvent usage and environmental impact.
Implementation Method 1
an active energy ray-curable resin composition can be cured at a low temperature in a short time
Data Source
AI summary
The present invention relates to a composition containing a compound (A) represented by the following general formula (I) and a compound having two or more polymerizable functional groups (B) in a molecule (except for compound (A)), wherein a mass ratio ((A)/(B)) of the compound (A) to the compound having two or more polymerizable functional groups (B) in a multi-molecule is 30/70 to 50/50: wherein, R1 and R2 each independently represent any one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group; R3 represents any one selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, and an aralkyl group; R4 represents any one selected from the group consisting of a (meth)acryloyl group, a styryl group, and an alkenyl group having 2 to 6 carbon atoms; and n represents any integer of 1 to 5.