Aqueous UV-Curable Ink Monomer for Solubility and Water Resistance
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Solution Overview
Problem
Existing active energy ray-curable inks face issues with monomer stability in aqueous solutions and cured products lacking water resistance.
Innovation Solution
Development of an active energy ray-curable aqueous ink containing a bifunctional polymerizable monomer represented by General Formula (1), which includes a divalent saturated hydrocarbon group with optional ether, amide, carbonyl, sulfone, or sulfonamide bonds, along with a polymerization initiator and optional coloring materials, to enhance water solubility and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional monomer is used in aqueous ink, then water solubility is improved, but water resistance of cured product deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the monomer by specifying a bifunctional structure with particular hydrocarbon groups (R1, R2, R3) and functional groups (L) in Formula (1). This structural parameter change enables the monomer to achieve both water solubility in the aqueous ink and water resistance in the cured product, resolving the contradiction between these two properties.
Solution Approach 2:
The patent uses a composite monomer structure combining hydrophilic groups (for water solubility) and hydrophobic groups (for water resistance) within the same molecular framework. The bifunctional monomer of Formula (1) integrates both water-soluble characteristics and water-resistant characteristics, allowing the cured product to exhibit both properties simultaneously.
2Ease of manufacture
If a conventional monomer is used in aqueous ink, then ease of manufacture is improved, but monomer stability in aqueous solution deteriorates
Solution Approach 1:
The patent specifies precise structural parameters for the monomer in Formula (1), including the hydrocarbon groups (R1, R2, R3 with specific carbon atom ranges) and functional groups (L with specific bond types). These parameter specifications ensure both ease of manufacture through established synthesis routes and enhanced stability in aqueous solutions by preventing unwanted chemical reactions.
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 ink achieves improved water solubility and water resistance of the cured product, ensuring stability and effective curing.
Implementation Method 1
an active energy ray-curable aqueous ink containing water and a curable substance and curable by an active energy ray, wherein the curable substance contains a bifunctional polymerizable monomer
Data Source
AI summary
Provided is an active energy ray-curable aqueous ink which contains water and a curable substance and curable by an active energy ray. The curable substance contains a bifunctional polymerizable monomer represented by the following General Formula (1):wherein, R1 is a hydrogen atom or a methyl group, R2 is a divalent saturated hydrocarbon group having 1 to 5 carbon atoms and L is a divalent saturated hydrocarbon group which may contain an ether bond, an amide bond, a carbonyl bond, a sulfone bond or a sulfonamide bond.