Organic Material Stabilizer Composition for NOx Color-Change Prevention
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Solution Overview
Problem
Existing stabilizers for organic materials are insufficient in preventing color change due to oxidized gases like NOx during processing, despite providing stability against heat and oxidizers.
Innovation Solution
A stabilizer comprising compounds represented by specific formulas (1) and (3) in a specific ratio, which interact to inhibit color change while enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phenol-based or phosphorus-based antioxidants are used to stabilize organic materials against heat and oxidizers, then stability during processing is improved, but color change due to oxidized gases like NOx cannot be sufficiently prevented
Solution Approach 1:
The patent combines a phosphite compound (Formula 1) with a phenolic antioxidant (Formula 3) to create a composite stabilizer system. This composite approach leverages the heat and oxidizer resistance of the phosphite compound while the phenolic antioxidant specifically addresses color change prevention from NOx exposure, resolving the contradiction between processing stability and color stability.
Solution Approach 2:
The patent optimizes the weight ratio parameters of the components, specifically setting the phenolic antioxidant at 0.01-50 parts by weight per 100 parts by weight of the phosphite compound. This parameter optimization ensures sufficient color protection while maintaining processing stability, resolving the contradiction through quantitative adjustment.
2Ease of manufacture
If phosphite compounds not corresponding to specified formula (I) are used, then manufacturing simplicity is maintained, but coloration due to NOx gas is insufficiently reduced
Solution Approach 1:
The patent specifies precise structural parameters for the phosphite compound (Formula 1) where R1-R10 must satisfy particular conditions. This structural parameter optimization enhances NOx coloration resistance while maintaining the fundamental phosphite compound structure, balancing manufacturing ease with improved performance.
3Reliability
If stabilizers focusing only on heat and oxidizer stability are used, then processing stability is achieved, but color change prevention capability is insufficient
Solution Approach 1:
The patent creates a multi-functional stabilizer system where the phosphite compound provides heat and oxidizer stability while the phenolic antioxidant component specifically targets color change prevention. This universal stabilizer addresses multiple degradation mechanisms simultaneously, resolving the contradiction between processing stability and color 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 stabilizer effectively prevents color change due to oxidized gases, particularly NOx, while maintaining stability during processing.
Implementation Method 1
Organic materials may deteriorate due to the action of heat, oxidizers typified by oxygen or ozone
Implementation Method 2
a stabilizer including a specified compound is effective... compounds represented by specific formulas (1) and (3) in a specific ratio, which interact to inhibit color change
Data Source
AI summary
The present invention relates to a stabilizer including (A) a compound selected from the group consisting of a compound represented by formula (1): wherein R1, R2, R4 and R5 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms or a phenyl group, R3 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X represents a single bond, a sulfur atom or a group -CH(-R13)-, wherein R13 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms or a cycloalkyl group having 5 to 8 carbon atoms, A represents an alkylene group having 1 to 8 carbon atoms or a group *-C(=O)-R14-, wherein R14 represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond to oxygen), any one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms or an aralkyloxy group having 7 to 12 carbon atoms, and the other thereof represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and a compound represented by formula (2): wherein R6 and R8 each independently represent a hydrogen atom, a methyl group, or an alkyl group having 5 to 8 carbon atoms, R7 each independently represents a hydrogen atom or a hydroxyl group, R9 each independently represents a hydrogen atom or a group -C15H25-31, provided that at least one R6, R7, R8 or R9 is not a hydrogen atom, and (B) a compound represented by formula (3): wherein R10, R11 and R12 each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or an arylalkyl group having 7 to 20 carbon atoms in total, provided that at least one of R10, R11 and R12 is not a hydrogen atom, wherein a content of the compound (B) is 0.01 to 50 parts by mass per 100 parts by mass of the compound (A).