Allyl Polymer Ink Composition for Adhesion and Fluidity
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Solution Overview
Problem
Active energy ray-curable ink compositions using allyl polymer as a binder resin face issues with insufficient adhesiveness and fluidity, leading to problems such as ink transfer and poor handling during printing.
Innovation Solution
Incorporating a polymer of allyl monomer with a resin of modified rosin and/or a resin containing a terpene monomer backbone into the ink composition, along with ethylenically unsaturated bonds, to enhance adhesiveness and fluidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If allyl polymer is used as binder resin in active energy ray-curable ink composition, then health and environmental concerns are reduced, but adhesiveness and fluidity become insufficient
Solution Approach 1:
The patent uses a composite binder resin system combining allyl polymer (for health/environmental benefits) with rosin resin and/or terpene resin (for adhesiveness and fluidity). This composite approach allows the ink to achieve both eco-friendliness and proper printing performance by leveraging the complementary properties of different resin types.
2Stability of the object's composition
If diallyl phthalate resin is used as binder resin, then compatibility with acrylate monomers is excellent, but health and environmental concerns increase due to phthalate ester raw materials
Solution Approach 1:
The patent replaces the problematic diallyl phthalate resin with allyl polymer derived from cycloalkane carboxylic acid or cycloalkene carboxylic acid esters. This substitution eliminates phthalate esters from the formulation while maintaining the necessary compatibility with acrylate monomers and oligomers through proper molecular structure design of the allyl polymer.
3Reliability
If conventional ink compositions are used, then adhesion is achieved, but drying time is considerable and affects printing speed
Solution Approach 1:
The patent utilizes photopolymerization phase transition where acrylate monomers and oligomers rapidly convert from liquid to cross-linked polymer network upon UV irradiation. This phase change enables instantaneous curing and adhesion formation, eliminating the lengthy drying process required by conventional solvent-based or oxidation-cured inks.
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 composition achieves satisfactory adhesiveness and fluidity, allowing for rapid curing and improved handling during printing processes.
Implementation Method 1
irradiation with ultraviolet rays or electron beams causes the components in the ink composition to increase in molecular weight to achieve drying
Data Source
AI summary
An active energy ray-curable ink composition is provided that exhibits both satisfactory adhesiveness and fluidity despite use a polymer of allyl monomer as a binder resin instead of conventional diallyl phthalate resin. The active energy ray-curable ink composition comprises a compound having an ethylenically unsaturated bond, an (A) component being a polymer of an allyl monomer represented by Formula (1), and a (B) component being a resin of modified rosin and/or a resin containing a terpene monomer backbone:where R1 and R2 are each independently a hydrogen atom or an alkyl group of 1 to 5 carbon atoms, X is an n-valent group comprising a 4 to 8 membered fatty ring skeleton, and n is 2 or 3.