Methyl Methacrylate Composition for UV-Stable Storage Purity

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Solution Overview

Problem

Methyl methacrylate quality deteriorates during storage due to the generation of dimers and methyl pyruvate, affecting the physical properties of the resulting polymer.

Innovation Solution

Incorporating an aryl alkyl ether compound represented by a specific structural formula into the methyl methacrylate composition to absorb ultraviolet light, reducing the generation of hydroxyl radicals and thereby minimizing the formation of dimers and pyruvate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If polymerization inhibitors are added to maintain methyl methacrylate quality, then polymerization is suppressed, but quality still deteriorates during storage due to dimer and pyruvate generation

Engineering Contradiction:

Improvequality stabilityVSAvoiddimer and pyruvate generation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces an aryl alkyl ether compound as an intermediary substance that mediates between ultraviolet light and methyl methacrylate. This compound absorbs ultraviolet light before it can initiate polymerization or oxidation reactions, thereby preventing dimer and pyruvate formation without directly participating in the harmful reactions. The aryl alkyl ether acts as a protective intermediary that blocks the formation pathway of harmful substances.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful effect of ultraviolet light into a beneficial protective mechanism. Instead of allowing ultraviolet light to directly cause polymerization and oxidation, the aryl alkyl ether compound absorbs this ultraviolet energy and dissipates it harmlessly, transforming the harmful radiation into a controlled energy absorption process that protects the methyl methacrylate from degradation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Duration of action of stationary object

If methyl methacrylate is stored for extended periods, then availability is maintained, but quality deteriorates due to polymerization and oxidation

Engineering Contradiction:

Improvestorage durationVSAvoidquality stability

Core Design Contradiction:

Duration of action of stationary objectVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by adding the aryl alkyl ether compound to the methyl methacrylate before storage begins. This preliminary addition establishes protective coverage against polymerization and oxidation reactions from the start of storage, preventing quality deterioration before it can occur during extended storage periods.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The aryl alkyl ether compound creates a protective inert environment around the methyl methacrylate molecules during storage. By absorbing ultraviolet light and preventing initiation of polymerization and oxidation reactions, the compound establishes a chemically inert protective zone that maintains the stability of methyl methacrylate composition throughout extended storage.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

3Reliability

If conventional polymerization inhibitors are used, then polymerization is inhibited, but physical properties of the resulting polymer are adversely affected

Engineering Contradiction:

Improvepolymerization controlVSAvoidphysical properties

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent replaces the conventional chemical inhibition mechanism (using polymerization inhibitors that directly interfere with polymerization chemistry) with a physical protection mechanism (using aryl alkyl ether to absorb ultraviolet light and prevent reaction initiation). This substitution avoids the adverse effects on physical properties while maintaining polymerization control, as the protection is physical rather than chemical.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The aryl alkyl ether compound serves as an intermediary that protects against polymerization and oxidation without directly interfering with the polymerization process itself. Unlike conventional inhibitors that chemically interfere with polymerization and adversely affect physical properties, the aryl alkyl ether merely blocks ultraviolet light initiation, allowing normal polymerization to proceed with good physical properties when needed.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 composition maintains high quality stability during storage with reduced generation of methyl methacrylate dimers and pyruvate, ensuring better physical properties of the polymer.

Implementation Method 1

Methodology Applied

Scientific EffectUltraviolet light absorption: Absorption (EM radiation)

Data Source

PatentEP4332130B1Methyl methacrylate-containing composition and method for producing methyl methacrylate polymer

Publication Date: 2025.12.24 MITSUBISHI CHEM CORP

AI summary

The purpose of the present invention is to provide a methyl methacrylate-containing composition with high quality stability during storage. This can be solved with a methyl methacrylate-containing composition comprising methyl methacrylate, and an aryl alkyl ether compound represented by the following Formula (1), in which the concentration of methyl methacrylate is from 99 to 99.99% by mass.