Recording Material Color Former Additive Oil Resistance Stability
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Solution Overview
Problem
Existing recording materials face challenges in achieving balanced color-developing performance, storage stability, and resistance to heat, oil, and plasticizers, while maintaining image quality over time.
Innovation Solution
A recording material comprising a color former, a specific diaminodiphenyl sulfone compound as an additive with a non-phenolic sulfonylurea color-developing agent, and a compound that reacts with the color-developing agent to enhance storage stability and image resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a non-phenolic sulfonylurea color-developing agent is used to achieve good oil resistance and background whiteness, then oil resistance and background quality are improved, but storage stability and heat resistance of colored images deteriorate
Solution Approach 1:
A phenolic compound is introduced as an intermediary substance between the non-phenolic sulfonylurea color-developing agent and the color former. This phenolic compound acts as a mediator that enables the color development reaction while providing the necessary storage stability and heat resistance that the non-phenolic agent alone cannot provide, thus resolving the contradiction between oil resistance and storage stability
Solution Approach 2:
The invention creates a composite color development system combining three components: non-phenolic sulfonylurea color-developing agent, phenolic compound, and color former. This composite approach allows each component to contribute its strengths - the non-phenolic agent provides oil resistance and background whiteness, while the phenolic compound provides storage stability and heat resistance
2Illumination intensity
If a non-phenolic sulfonylurea color-developing agent is used to achieve good background whiteness, then background quality is improved, but heat resistance of colored images deteriorates
Solution Approach 1:
The phenolic compound serves as a mediator that bridges the gap between the non-phenolic sulfonylurea agent and the color former, enabling the reaction to proceed while conferring heat resistance to the developed image, thus allowing background whiteness to be maintained without sacrificing heat resistance
3Reliability
If a diaminodiphenyl sulfone compound is used as an additive with non-phenolic sulfonylurea color-developing agent, then storage stability is improved, but device complexity increases
Solution Approach 1:
The phenolic compound performs multiple functions simultaneously: it acts as a mediator for color development, provides storage stability, and confers heat resistance. This multi-functionality reduces the need for multiple separate additives, thereby limiting the increase in formulation complexity while achieving improved storage stability
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 solution provides improved color-developing performance, storage stability, heat resistance, and oil resistance, ensuring the longevity and quality of colored images.
Implementation Method 1
recording material employing color development through a reaction between a color former and a color-developing agent
Data Source
AI summary
An object of the present invention is to provide a recording material and a recording sheet having better color-developing performance, storage stability, etc. A recording material of the present invention contains (A) at least one color former, (B) at least one compound selected from the group consisting of compounds represented by the following formula (I), and (C) at least one compound selected from the group consisting of compounds represented by the following formula (II) (wherein R1 to R3 each represent a halogen atom, a nitro group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C2 to C6 alkenyl group or a C1 to C6 haloalkyl group, n1 and n3 each independently represent any integer of 0 to 5, n2 represents any integer of 0 to 4, and X represents -SO2-O- or -O-SO2-) .