Water-Based Ink Resin Emulsion for Adhesion and Blocking Resistance
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Solution Overview
Problem
Existing water-based inks lack sufficient scratch resistance, adhesion to substrates, and blocking resistance, which are essential properties for industrial applications such as inkjet printing and offset printing.
Innovation Solution
A resin emulsion for water-based ink containing emulsion particles and a carboxylic acid polymer non-metal salt, where the emulsion particles are formed through emulsion-polymerization of a monomer component including nitrogen atom-containing monomers, particularly piperidine monomers or nitrogen atom-containing (meth)acrylates, which are then mixed with the carboxylic acid polymer non-metal salt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-based ink composition containing resin emulsion and water-insoluble curable compound is used, then storage stability and coating film properties (curl resistance, scratch resistance, water resistance, weather resistance) are improved, but adhesion property to substrate and blocking resistance remain insufficient
Solution Approach 1:
The patent uses a composite resin emulsion system combining acrylic resin emulsion with styrene-maleic acid copolymer emulsion. This composite approach creates synergistic effects where the styrene-maleic acid copolymer component specifically enhances adhesion to substrates while the acrylic resin provides storage stability and film-forming properties, thus resolving the contradiction between storage stability and adhesion property
Solution Approach 2:
The patent specifies precise parameter ranges for the resin emulsion including glass transition temperature (0 to 120°C), minimum film-forming temperature (0 to 30°C), and particle size distribution. By optimizing these parameters, the ink achieves both improved storage stability and enhanced adhesion property to substrate, resolving the technical contradiction
2Reliability
If a water-based ink composition containing resin emulsion and water-insoluble curable compound is used, then storage stability and coating film properties are improved, but blocking resistance remains insufficient
Solution Approach 1:
The composite resin emulsion system combining acrylic resin with styrene-maleic acid copolymer provides both storage stability and blocking resistance. The specific composition ratio and molecular structure of the composite emulsion prevent ink blocking during storage and transport while maintaining film quality, resolving the contradiction between storage stability and blocking resistance
3Stability of the object's composition
If organic solvent-based ink composition is used, then water resistance is improved, but safety for human bodies deteriorates and odor generation occurs
Solution Approach 1:
The patent changes the fundamental parameter of the solvent system from organic solvent to water-based system. By carefully selecting and optimizing the resin emulsion composition (acrylic resin with specific Tg range, styrene-maleic acid copolymer content), the invention achieves water resistance comparable to or exceeding organic solvent-based inks while completely eliminating the safety and odor problems associated with organic solvents
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 resulting water-based ink exhibits enhanced scratch resistance, adhesion to substrates, and blocking resistance, making it suitable for various printing methods.
Implementation Method 1
carrying out an emulsion-polymerization of a monomer component including a nitrogen atom-containing monomer, to give a resin emulsion including emulsion particles
Data Source
AI summary
A resin emulsion to be used in a water-based ink, wherein the resin emulsion for a water-based ink is characterized by containing emulsion particles and a carboxylic acid polymer non-metal salt and by the emulsion particles containing a polymer comprising a monomer component including a nitrogen atom-containing monomer; and a resin emulsion for a water-based ink that can be used suitably in the water-based ink and a method for producing the same.