Liquid Amylaryl Phosphite Stabilizers for Polymer Processing
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Solution Overview
Problem
There is a need for novel alkylaryl phosphite compositions that are liquid at ambient conditions, stable, and free from estrogenicity concerns associated with nonylphenol, to effectively stabilize polymer resins against heat and light degradation, while also addressing processing limitations of solid phosphite stabilizers.
Innovation Solution
The development of alkylate compositions comprising monoamylphenol and diamylphenol, with specific weight ratios and reaction with phosphorus trihalides to form liquid amylaryl phosphite compositions, which include tris(diamylaryl)phosphite, tris(monoamylaryl)phosphite, bis(diamylaryl)monoamylaryl phosphite, and bis(monoamylaryl)diamylaryl phosphite, ensuring the phosphite compositions are stable liquids with low viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid alkylaryl phosphites are used as stabilizers, then effective stabilization against heat and light degradation is achieved, but processing limitations occur including plating out during processing and forming deposits on machinery surfaces
Solution Approach 1:
The invention changes the physical state parameter of the phosphite stabilizer from solid to liquid by modifying the molecular structure (using specific alkylaryl groups with 6-18 carbon atoms). This parameter change resolves the contradiction by maintaining stabilization effectiveness while eliminating processing issues associated with solid forms such as plating out and deposit formation.
2Ease of manufacture
If solid organic phosphites are processed by heating and melting, then incorporation into polymer compositions is achieved, but handling and processing costs increase
Solution Approach 1:
The invention changes the physical state from solid to liquid, which eliminates the need for heating and melting processes. Liquid phosphites can be directly incorporated into polymer compositions through mixing, significantly reducing energy consumption and processing costs while maintaining ease of manufacture.
3Ease of operation
If TNPP (tris(p-nonylphenyl)phosphite) is used as a liquid phosphite stabilizer, then processability and handling are improved, but estrogenicity concerns arise from nonylphenol
Solution Approach 1:
The invention extracts or removes the harmful nonylphenol component from the phosphite structure while retaining the beneficial liquid properties and stabilization effectiveness. By using alternative alkylaryl groups (with 6-18 carbon atoms) instead of nonylphenol, the patent eliminates estrogenicity concerns while maintaining ease of operation.
Solution Approach 2:
The invention replaces the problematic nonylphenol-based structure with alternative alkylaryl phosphite structures that achieve the same functional goals without the harmful effects. This substitution principle allows maintaining processability while eliminating harmful factors.
4Ease of operation
If liquid phosphite compositions are used, then handling problems and processability are improved, but the compositions must remain stable through multiple freeze/thaw cycles
Solution Approach 1:
The invention uses composite alkylaryl phosphite compositions containing multiple components (phosphite esters with specific alkylaryl groups) that work together to maintain both liquid state at ambient conditions and stability through freeze/thaw cycles. The composite nature of the composition allows simultaneous achievement of ease of operation and compositional 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 resulting phosphite compositions are stable liquids with low viscosity, capable of effectively stabilizing polymers against heat and light degradation, avoiding the processing issues of solid phosphites and estrogenicity concerns, and maintaining stability through multiple freeze/thaw cycles.
Implementation Method 1
reaction with phosphorus trihalides to form liquid amylaryl phosphite compositions
Data Source
AI summary
Alkylate compositions comprising a monoamylphenol in an amount ranging from 25 weight percent to 99 weight percent and a diamylphenol in an amount ranging from 1 weight percent to 60 weight percent, the weight percentages being based on the total weight of all components in the alkylate composition. The invention is also to processes for making such alkylate compositions and to processes for forming stable liquid amylaryl phosphite compositions from such alkylate compositions.