Cyanate-based, carbon-dioxide-filled structured foams and method for their production
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsSiegfried Vieth, Monika Bauer
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Abstract
The present invention concerns a polycyanurate foam with a structural element A and either terminal amino groups and/or at least one of the following structural elements B, C, or D: wherein the foam has closed pores that contain carbon dioxide. This foam can be produced in that a substance is worked into the starting material for the polycyanurate that releases water or alcohol approximately at the start of polymerization either spontaneously or thermally or catalytically induced. The water/alcohol reacts with free cyanate groups under cleavage of CO2. The resulting amino groups can react further in the polymerization.
Claims31
A polycyanurate foam, comprising a structural element A and either terminal amino groups and/or at least one of the following structural elements B, C, or D:
- wherein the foam has closed pores that contain carbon dioxide, and further comprising at least one component selected from the group consisting of A) a product of a condensation reaction that releases water or alcohol and B) a substance that is capable of physically bonding and releasing water, alcohol, or water and alcohol, wherein said at least one component has released a portion of, or the entire amount of, water, alcohol, or water and alcohol.
Dependencies are inferred from the claim text.