Polyol Composition Phosphorus Catalyst Removal
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Solution Overview
Problem
Polymerization catalysts, such as phosphorus compounds, can cause side reactions and reduce the storage stability and physical properties of polyurethanes, necessitating costly removal processes like deposition, filtration, or distillation.
Innovation Solution
A method for producing a polyol composition by reacting a compound with an active hydrogen and a compound having a carboxyl group or ester group in the presence of a phosphorus compound without using metal-based polymerization catalysts, controlling the phosphorus compound amount to 0.0001-0.05 parts by mol, to minimize phosphorus residue and prevent side reactions during urethanization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a phosphorus compound is used as a polymerization catalyst, then the polyol composition can be produced efficiently, but the phosphorus compound causes side reactions during urethanization and reduces storage stability and physical properties of the polyurethane
Solution Approach 1:
The invention extracts and removes the phosphorus compound catalyst from the reaction system after polymerization is complete. The polyol composition is specifically designed to allow easy removal of the phosphorus catalyst through filtration or decantation, thereby eliminating the harmful effects of residual phosphorus on polyurethane storage stability and physical properties while maintaining the productivity benefits of using a phosphorus catalyst during synthesis
Solution Approach 2:
The invention introduces a specific polyol composition structure that acts as an intermediary between the phosphorus catalyst and the final polyurethane product. This composition allows the phosphorus catalyst to perform its function during polymerization but facilitates its subsequent removal, preventing it from causing side reactions during urethanization and ensuring high storage stability of the final product
2Productivity
If a metal-based polymerization catalyst is used, then the polymerization reaction proceeds efficiently, but the catalyst must be removed through costly deposition, filtration, or distillation operations
Solution Approach 1:
The invention extracts the metal-based polymerization catalyst from the reaction mixture and replaces it with a phosphorus compound catalyst that can be easily removed through simple filtration or decantation. This eliminates the need for costly deposition, filtration, or distillation operations while maintaining efficient polymerization reaction
Solution Approach 2:
The invention changes the catalyst type parameter from metal-based to phosphorus compound-based. This parameter change maintains the efficiency of the polymerization reaction while fundamentally altering the removal process from complex and costly operations to simple filtration or decantation, thereby reducing production costs and simplifying the manufacturing process
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
This approach allows for the production of polyurethanes with enhanced storage stability and mechanical properties without the need for polymerization catalyst removal operations, reducing production costs and improving yield and purity.
Implementation Method 1
reacting a compound having an active hydrogen with a compound having at least one selected from the group consisting of a carboxyl group, ester group and acid halide group in the presence of 0.0001-0.05 parts by mol of a phosphorus compound with respect to 1 part by mol of the active hydrogen without using a metal-based polymerization catalyst
Data Source
AI summary
The present invention provides a polyol composition comprising a polyol having a polyester chain, wherein the polyol composition substantially contains no metal-base polymerization catalyst and an amount of phosphorus element derived from a polymerization catalyst is 1 to 1000 ppm. Furthermore, the present invention provides a method for producing a polyol composition comprising reacting a compound having an active hydrogen with a compound having at least one selected from the group consisting of carboxyl group, ester group and acid halide group in the presence of 0.0001-0.05 parts by mol of a phosphorus compound with respect to 1 part by mol of the active hydrogen without using a metal-based polymerization catalyst.