Bio-Based Polymer Foam via Carbon-Michael Addition
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Solution Overview
Problem
The polyurethane foam industry faces challenges in producing alternatives to isocyanate-based foams that are both biodegradable and fully bio-based, as existing methods either partially use bio-based materials or require non-bio-based feedstocks.
Innovation Solution
A method involving the use of plant oils that are epoxidized and then processed to form Michael donor and acceptor components, which are mixed with a catalyst, surfactant, and blowing agent to create a bio-based polymer foam through carbon-Michael addition polymerization at room temperature, resulting in a mechanically rigid and highly cross-linked foam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If isocyanate-based polyurethane chemistry is used, then foam production effectiveness and economies of scale are improved, but environmental harm and biodegradability are worsened
Solution Approach 1:
The patent extracts and eliminates isocyanates from the foam production system by replacing them with alternative chemistry (carbodiimide or isocyanate-free polyurethane chemistry). This removal of the harmful substance allows the foam to be biodegradable while maintaining production effectiveness through optimized alternative chemical pathways.
Solution Approach 2:
The patent changes the chemical parameters of the foam production system by substituting isocyanate-based chemistry with biodegradable alternatives. This includes modifying the chemical composition to use biodegradable polyols and alternative crosslinking mechanisms, thereby transforming the system from non-biodegradable to biodegradable while maintaining foam performance.
2Object-affected harmful factors
If partially bio-based materials are used in foam production, then environmental impact is reduced, but full biodegradability and sustainability are not achieved
Solution Approach 1:
The patent applies partial action by initially using partially bio-based materials to achieve some environmental benefit, then progressively increases the bio-based content to 100% through systematic substitution of petrochemical components with renewable alternatives, ultimately achieving full biodegradability.
Solution Approach 2:
The patent changes the compositional parameters by systematically replacing petrochemical feedstocks with bio-based alternatives across all components (polyols, crosslinkers, additives), transforming the foam from partially bio-based to fully bio-based while ensuring biodegradability is maintained or enhanced.
3Reliability
If isocyanate-free chemistry is used, then biodegradability is improved, but feedstock sustainability is worsened due to non-bio-based requirements
Solution Approach 1:
The patent applies universality by developing a platform approach where bio-based polyols can serve multiple functions: as the primary polymer matrix, as crosslinking agents, and as precursors for various foam components. This multi-functionality allows 100% bio-based feedstock to replace all petrochemical components while maintaining isocyanate-free chemistry and biodegradability.
Solution Approach 2:
The patent applies preliminary action by pre-synthesizing bio-based polyols and alternative chemistry components before foam production, ensuring that all feedstocks are bio-based and biodegradable from the outset. This preliminary preparation of sustainable components enables the final foam product to achieve both biodegradability and full feedstock sustainability.
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 method enables the sustainable production of polymer foam that is entirely bio-based, reducing energy consumption and environmental impact while maintaining mechanical rigidity and cross-linking, thus providing a viable alternative to traditional polyurethane foams.
Implementation Method 1
a two-component system that cures at room temperature after mixing in the presence of a strong base catalyst by carbon-Michael addition polymerization, forming mechanically rigid and highly cross-linked polymer
Implementation Method 2
The blowing agents expand during the exothermic reaction of Michael donor and Michael acceptor to generate the blowing gas, which forms a foam structure
Data Source
Figure 1
AI summary
The invention relates to a method of manufacture of a thermoset polymer foam that is at least from 50 to 100 percent by weight of renewable raw material resources and to the foam obtained by the method. Foam is obtained from a two-component system that cures at room temperature after mixing in the presence of a strong base catalyst by carbon-Michael addition polymerization, forming mechanically rigid and highly cross-linked polymer. Both components of the carbon-Michael addition are developed from bio-based feedstock.