Shelf life of polyol blends containing halogenated olefins by encapsulation of active components
AssigneeArkema Inc.
InventorsBenjamin Bin Chen, Joseph S. Costa, Laurent Abbas, Sri R. Seshadri
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Abstract
The shelf life of polyurethane polyol pre-blends containing halogenated olefins is extended by encapsulation of active components such as catalysts and/or surfactants. The active component is encapsulated in a crystallizable or thermoplastic polymer. The encapsulated particles have a size of 2,800 microns or less and the active components are not significantly leaked out, particularly in the presence of halogenated olefins.
Claims24
A foam premix which exhibits prolonged shelf-life/stability comprising a foam forming component selected from polyol, polyisocyante and isocyante;
- a surfactant encapsulated in an encapsulating agent;
- a catalyst encapsulated in an encapsulating agent;
- a halogenated hydroolefin blowing agent;
- a carbon dioxide generating agent;
- and optionally an ester.
A polyol, polyisocyante or isocyante foam formed from a foam premix which exhibits prolonged shelf-life/stability comprising a polyol, polyisocyante or isocyante foam forming component;
- a surfactant encapsulated in an encapsulating agent;
- a catalyst encapsulated in an encapsulating agent;
- a halogenated hydroolefin blowing agent;
- a carbon dioxide generating agent;
- and optionally an ester.
Dependencies are inferred from the claim text.