Cyclic Amine Catalysts for Polyurethane Foam Odor Reduction
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Solution Overview
Problem
Conventional tertiary amine catalysts used in polyurethane foam production cause odor issues, fogging, staining of vinyl films, and degradation of polycarbonate sheets, and often require high levels to compensate for weak catalytic activity, leading to stability and processing problems.
Innovation Solution
The use of cyclic amine compounds, amine alkoxylates, and amine polyether polyols, which provide desirable physical and catalytic properties, such as low volatility, good color, and effective catalytic activity, to improve the production of polyurethane foams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional tertiary amine catalysts are used in polyurethane foam production, then catalytic activity is achieved, but odor issues, fogging, and staining of vinyl films occur
Solution Approach 1:
The patent changes the chemical structure parameters of the amine catalyst by introducing cyclic structures (piperidine, piperazine rings) and modifying alkyl substituents. This structural modification reduces volatility and harmful emissions while maintaining catalytic activity, directly resolving the contradiction between productivity and harmful factors
Solution Approach 2:
The invention uses composite amine structures combining cyclic rings with specific alkyl substituents (e.g., bis(2-(piperazin-1-yl)ethyl)amine). This composite molecular structure achieves both high catalytic activity and reduced odor/fogging properties by balancing reactivity with lower volatility
2Productivity
If conventional tertiary amine catalysts are used, then catalytic function is provided, but staining of vinyl films and degradation of polycarbonate sheets occur
Solution Approach 1:
The patent modifies the chemical parameters of the catalyst by using cyclic amine structures with specific molecular weights and functionalities. These parameter changes reduce the catalyst's ability to cause staining and degradation while preserving its catalytic function, thus resolving the contradiction between productivity and harmful effects on materials
3Productivity
If high levels of conventional catalysts are used to compensate for weak catalytic activity, then adequate catalysis is achieved, but stability and processing problems arise
Solution Approach 1:
The invention changes the catalyst structure to cyclic amines with optimized molecular weights and functionalities, achieving high catalytic activity at lower concentrations. This eliminates the need for high catalyst levels that cause stability problems, resolving the contradiction between productivity and composition stability
4Object-generated harmful factors
If cyclic amine compounds with low volatility are used, then odor and fogging are reduced, but catalytic activity may be affected
Solution Approach 1:
The patent optimizes the molecular structure parameters of cyclic amines by adjusting ring size, substituent types, and molecular weight. This achieves the right balance between low volatility (reduced odor/fogging) and high catalytic activity, resolving the contradiction between reducing harmful factors and maintaining productivity
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
These cyclic amine compounds and derivatives offer improved mixing, handling, and reaction distribution, resulting in polyurethane foams with enhanced properties like reduced odor, improved color, and increased consumer value, while maintaining effective catalytic activity and stability.
Implementation Method 1
Catalysts can play a key role in ensuring desirable foam properties by controlling and balancing the gelling and blowing reactions during foam production
Implementation Method 2
Polyurethane foams typically are produced by the reaction of polyols with isocyanates in the presence of water acting as blowing agent. The reaction leading to polyurethane foam formation reaction generally consists of the urethane reaction (gelling) and urea reaction (blowing), which is associated with carbon dioxide (CO2) production
Data Source
Figure 1
Figure 2~3
AI summary
The present invention describes cyclic amine compounds useful for catalysts forpolyurethane form-forming compositions, as well as amine alkoxylates and amine polyether polyols formed form the cyclic amines. The cyclic amine compounds of the invention provide distinct benefits for reaction compositions, methods, and polyurethane foams based on their desirable physical and catalytic properties.