Asymmetric Trisphenol Crosslinker for Solubility and Cold Storage Stability

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Solution Overview

Problem

Phenolic methylol and methoxymethyl compounds used as crosslinking agents tend to crystallize in solvents due to their symmetric basic skeleton, limiting their solubility and requiring refrigerated storage, which affects production efficiency and storage stability of photosensitive resin compositions.

Innovation Solution

Introducing a linear alkylene group into the basic skeleton, such as that of raspberry ketone, reduces molecular stacking and enhances solvent solubility, preventing crystallization during refrigerated or frozen storage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If phenolic methylol compounds and methoxymethyl compounds with symmetric basic skeletons are used as crosslinking agents, then crosslinking efficiency is improved, but solvent solubility deteriorates and crystallization occurs during storage

Engineering Contradiction:

Improvecrosslinking efficiencyVSAvoidstorage stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent applies asymmetry by replacing the symmetric basic skeleton of conventional crosslinking agents with an asymmetric basic skeleton containing a linear alkylene group (specifically the raspberry ketone structure). This asymmetric structure prevents molecular stacking and crystallization while maintaining crosslinking functionality, thereby improving storage stability without sacrificing crosslinking efficiency

Inventive Principle:

Principle #4Asymmetry

2Productivity

If high-concentration solutions are prepared at room temperature, then production efficiency is improved, but crystal precipitation occurs during refrigerated or frozen storage

Engineering Contradiction:

Improveproduction efficiencyVSAvoidquality maintenance stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary anti-action by designing the crosslinking agent with an asymmetric basic skeleton that preemptively prevents crystallization and crystal precipitation. The molecular structure is specifically engineered to resist stacking and ordering that lead to crystallization, thereby maintaining solution stability during refrigerated or frozen storage and eliminating the need for quality maintenance issues

Inventive Principle:

Principle #9Preliminary anti-action

3Stability of the object's composition

If refrigerated or frozen storage is used to prevent crosslinking, then storage stability is improved, but only low-concentration solutions can be prepared

Engineering Contradiction:

Improvestorage stabilityVSAvoidconcentration of crosslinking agent

Core Design Contradiction:

Stability of the object's compositionVSQuantity of substance

Solution Approach 1:

The asymmetric basic skeleton with linear alkylene group prevents molecular stacking and crystallization, allowing high-concentration solutions to be prepared and stored without precipitation. This structural modification enables both high concentration and storage stability to coexist

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS12479784B2Trisphenol derivative

Publication Date: 2025.11.25 HONSHU CHEM INDAL

AI summary

In order to provide a novel compound that has good solvent solubility, has high storage stability (dissolution stability) during refrigerated or frozen storage, and can be used as a crosslinking agent, a substituted trisphenol compound represented by formula (2) below is provided: