Yellow Toner Alkyl Substituents Storage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing yellow toners have limitations in storage stability, blocking resistance, environmental stability of chargeability, and light fastness, despite their good color tone and tinting strength.
Innovation Solution
A yellow toner comprising toner particles with a binder resin and a colorant compound, specifically formulated with alkyl groups of certain carbon numbers, produced through methods such as suspension polymerization, suspension granulation, or emulsion aggregation, to enhance storage stability and light fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional yellow colorants with pyridoneazo skeleton are used, then color tone and tinting strength are improved, but storage stability and light fastness deteriorate
Solution Approach 1:
The patent modifies the chemical structure of yellow colorants by introducing specific substituent groups (alkyl groups with 3 or more carbon atoms at positions 2 and 6 of the pyridone ring, and various substituents on the azo-linked aromatic ring) to improve storage stability and light fastness while maintaining tinting strength
Solution Approach 2:
The patent creates composite colorant molecules combining the pyridoneazo skeleton with specific stabilizing substituent groups, forming a composite structure that simultaneously provides good color properties and enhanced stability
2Measurement precision
If conventional yellow colorants are used, then color quality is improved, but blocking resistance deteriorates
Solution Approach 1:
The patent introduces bulky alkyl groups (with 3 or more carbon atoms) at positions 2 and 6 of the pyridone ring, which sterically hinder close packing of colorant molecules, thereby preventing aggregation and blocking while maintaining color quality
3Measurement precision
If conventional yellow colorants are used, then initial color performance is improved, but environmental stability of chargeability deteriorates
Solution Approach 1:
The patent modifies the colorant structure by adding electron-donating or electron-withdrawing substituents that stabilize the colorant against environmental factors (humidity, temperature), thereby improving chargeability stability without compromising color performance
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 yellow toner exhibits improved storage stability, blocking resistance, environmental triboelectric stability, and light fastness, maintaining high tinting strength and color quality.
Implementation Method 1
polymerizing the polymerizable monomer to produce the toner particle
Implementation Method 2
preparing a suspension by dispersing in an aqueous medium a polymerizable monomer composition containing the colorant
Implementation Method 3
forming the toner particle by aggregation and heat fusing
Implementation Method 4
forming the toner particle by aggregation and heat fusing
Data Source
AI summary
A yellow toner is provided. The yellow toner includes toner particles containing a binder resin and a colorant containing at least one compound selected the group consisting of compounds given by the following formulae (1), (2), and (3) for used in a recording method such as an electrophotographic method, an electrostatic recording method, a magnetic recording method, or a toner jet method, and to a method for producing the toner:wherein in the formulae (1), (2), and (3) the R groups are as set forth in the specification.