Alkoxy-Modified Acrylic Ink Composition for Low Viscosity and Scratch Resistance
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Solution Overview
Problem
Conventional photopolymerizable inks containing (meth)acrylic acid esters pose skin sensitization risks and have issues with ink viscosity and film durability, leading to problems with inkjet printing, such as nozzle clogging and incomplete layer formation.
Innovation Solution
An active energy ray curing type composition combining diethylene glycol dimethacrylate and alkoxy-modified (meth)acrylic acid ester with polyether-modified polysiloxane, which reduces skin sensitization risk, maintains low viscosity for inkjet compatibility, and enhances film robustness and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional (meth)acrylic acid esters are used in photopolymerizable ink, then low cost and easy availability are achieved, but skin sensitization toxicity increases
Solution Approach 1:
The patent changes the chemical structure parameters of (meth)acrylic acid esters by introducing alkoxy groups at specific positions (beta or gamma positions) to modify their biological properties. This structural modification reduces skin sensitization potential while maintaining the essential polymerization properties needed for ink functionality, thus resolving the contradiction between ease of manufacture and harmful factors.
Solution Approach 2:
The patent uses composite monomer systems combining diethylene glycol dimethacrylate with alkoxy-modified (meth)acrylic acid esters. This composite approach allows the ink to benefit from the low cost and good availability of conventional esters while the alkoxy-modified components provide reduced toxicity, achieving both affordability and safety.
2Strength
If viscosity of ink is increased by blending various materials such as pigments and additives, then film robustness is improved, but ink discharging performance deteriorates
Solution Approach 1:
The patent carefully controls the viscosity parameter of the ink composition by selecting monomers with appropriate molecular weights and structures. The use of diethylene glycol dimethacrylate and alkoxy-modified esters provides a balance where the viscosity is high enough to form robust films but low enough to enable proper inkjet discharging, resolving the contradiction between strength and productivity.
3Reliability
If inkjet nozzles are clogged, then ink discharging is disrupted, but incomplete layer formation occurs
Solution Approach 1:
The patent optimizes the viscosity and surface tension parameters of the ink to prevent nozzle clogging while ensuring complete layer formation. The specific monomer combination achieves a viscosity range that prevents clogging and a surface tension that ensures proper spreading and coverage, thereby maintaining both discharging reliability and manufacturing precision.
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 cured film with improved scratch resistance and uniformity, preventing ink omission and cracking, while ensuring safety from skin sensitization and maintaining low viscosity for efficient inkjet printing.
Implementation Method 1
active energy ray curing type composition
Data Source
AI summary
An active energy ray curing type composition contains (meth)acrylic acid ester; and polyether-modified polysiloxane, wherein (meth)acrylic acid ester comprises diethylene glycol dimethacrylate and alkoxy-modified (meth)acrylic acid ester.