Synergistically active composition
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Solution Overview
Problem
Existing reducing agents in emulsion polymerizations, such as bisulfites and ascorbic acid, have lower reducing power and lead to increased coagulate formation and yellowing, while formaldehyde sulfoxylates are effective but release toxic formaldehyde.
Innovation Solution
A synergistic mixture of sulfinic acid or its salt and ascorbic acid or its salt, which exhibits higher reducing power than either component alone, reducing formaldehyde release and yellowing, and is stable over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If formaldehyde sulfoxylates are used as reducing agents, then reducing power is improved, but toxic formaldehyde is released
Solution Approach 1:
The patent combines two different reducing agents (sulfinic acid derivative and ascorbic acid or isoascorbic acid) into a synergistic mixture. This merging allows the composition to achieve high reducing power comparable to formaldehyde sulfoxylates while eliminating formaldehyde release, as each component contributes different reducing mechanisms that complement each other
2Object-generated harmful factors
If alternative reducing agents (bisulfites, ascorbic acid) are used to avoid formaldehyde release, then harmful factors are reduced, but reducing power decreases
Solution Approach 1:
The patent merges a sulfinic acid derivative (providing strong reducing power) with ascorbic acid or isoascorbic acid (providing sustained reducing action and stability). This combination creates a synergistic effect where the total reducing power exceeds the sum of individual components, achieving both high reducing power and formaldehyde-free operation
Solution Approach 2:
The invention creates a composite reducing system by combining chemically distinct reducing agents with complementary properties. The sulfinic acid derivative provides initial strong reduction while ascorbic acid/isoascorbic acid provides sustained reducing action, creating a composite material with superior overall performance
3Object-generated harmful factors
If ascorbic acid or isoascorbic acid is used as reducing agent, then formaldehyde release is prevented, but coagulate formation increases
Solution Approach 1:
The patent combines sulfinic acid derivative with ascorbic acid or isoascorbic acid in specific ratios. The sulfinic acid derivative component helps prevent coagulate formation by providing alternative reduction pathways that are less prone to causing polymer coagulation, while maintaining the formaldehyde-free advantage of the ascorbic acid system
4Object-generated harmful factors
If ascorbic acid or isoascorbic acid is used as reducing agent, then formaldehyde release is prevented, but yellowing increases
Solution Approach 1:
The patent merges sulfinic acid derivative with ascorbic acid or isoascorbic acid to create a system where the sulfinic acid component reduces chromophoric groups more effectively, thereby minimizing yellowing. The synergistic combination allows for reduced amounts of ascorbic acid to be used, which in turn reduces yellowing while maintaining formaldehyde-free operation
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 synergistic mixture enhances reducing power, reduces residual monomer content, and prevents formaldehyde evolution, making it suitable for emulsion polymerizations at lower temperatures and in textile applications.
Implementation Method 1
a synergistic mixture of sulfinic acid or its salt and ascorbic acid or its salt, which exhibits higher reducing power
Data Source
AI summary
The invention relates to a synergistically active composition which comprises a mixture of a sulfinic acid or a salt thereof and ascorbic acid or a salt thereof and the use of the composition as reducing agent. The reducing power of the composition of the invention is significantly higher than the reducing power of the single components.