Aqueous Ink Composition Alkyl Polyol Drying
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Solution Overview
Problem
Aqueous inkjet inks face challenges in achieving stable dispersion, storage stability, and drying properties, particularly when printing on low-absorption substrates like coated papers and vinyl chloride sheets, due to issues with pigment dispersibility and solvent penetration, leading to poor image quality and increased printing time.
Innovation Solution
An aqueous ink composition containing a specific combination of alkyl polyols with boiling points between 180°C and 250°C and a pigment dispersing resin with an alkyl group of 10 to 36 carbon atoms, which improves viscosity, dispersion stability, and drying properties, enabling effective printing on various substrates without compromising pigment dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a water-soluble solvent with high boiling point and superior penetration is added to improve drying properties, then drying properties are improved, but pigment dispersibility and storage stability deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the solvent system by specifying alkyl polyols with boiling points between 180-250°C and particular carbon chain lengths (10-36 atoms), which modifies the ink's penetration and drying characteristics while maintaining pigment dispersibility through careful parameter selection
Solution Approach 2:
The patent uses a composite solvent system combining alkyl polyols with specific carbon chain lengths (10-36 atoms) and pigment dispersing resins, creating a multi-component formulation that achieves both superior penetration/drying properties and maintained pigment dispersibility through synergistic interactions
2Object-affected harmful factors
If aqueous ink is used to reduce environmental harm, then environmental friendliness is improved, but penetration into low-absorption substrates deteriorates
Solution Approach 1:
The patent modifies the physical parameters of the aqueous ink by incorporating alkyl polyols with specific boiling points (180-250°C) and carbon chain lengths, which enhances penetration into low-absorption substrates while maintaining the environmental benefits of aqueous formulation
3Stability of the object's composition
If pigment dispersing resin is used to improve pigment dispersibility, then dispersion stability is improved, but drying properties deteriorate
Solution Approach 1:
The patent optimizes the molecular parameters of the pigment dispersing resin by specifying alkyl groups with 10-36 carbon atoms, which maintains dispersion stability while the accompanying alkyl polyol solvent system compensates for any drying performance loss through enhanced penetration capabilities
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 excellent dispersion stability, storage stability, and drying properties, allowing for high-quality image formation on diverse substrates, including low-absorption materials, while maintaining print stability and preventing nozzle blockages.
Implementation Method 1
alkyl polyols with boiling points between 180°C and 250°C
Implementation Method 2
boiling points between 180°C and 250°C
Implementation Method 3
pigment dispersing resin with an alkyl group of 10 to 36 carbon atoms
Implementation Method 4
pigment dispersing resin
Data Source
AI summary
An aqueous ink composition containing, at least, water, a pigment (but excluding titanium oxides in which the pigment surface has been treated with an organic compound), a pigment dispersing resin, and two or more types of alkyl polyols having boiling points of at least 180°C but not more than 250°C at 1 atmosphere, wherein the pigment dispersing resin has an alkyl group of 10 to 36 carbon atoms, and the total amount of the alkyl polyols, relative to the total weight of the aqueous ink composition, is at least 10% by weight but not more than 30% by weight.