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US 6,444,713 B1Granted
Foaming compositions and methods for making and using the compositions
AssigneeDenovus LLC
InventorsJeffrey T. Pachl, Donald Taylor, James W. Freitag
Life of this patent
Estimating the term…
Abstract
A low-temperature foam compositions and that are produced from an epoxy compound and an acid source can be substantially free of polyurethane or isocyanate chemistry. The disclosed compositions and precursors thereof reduce, if not eliminate, the presence of conventional undesirable compounds and by-products thereof.
Claims32
A method for producing a foam comprising:
- (a) combining an A side component comprising a combination comprising at least one cationic epoxy and at least one phenoxy resin with a B side component comprising a combination comprising at least one acid source comprising at least one hydrogen donating Lewis Acid and at least one polyol while in the presence of an encapsulated blowing agent and under conditions sufficient to permit an exothermic reaction between at least a portion of said at least one cationic epoxy and said at least one hydrogen donating Lewis Acid;
- and
- (b) utilizing heat from the exothermic reaction so as to expand the combined components to form a foam.
A method for producing a foam comprising:
- (a) providing a foam precursor comprising (i) at least one epoxy component, (ii) at least one photoinitiator, and (iii) an encapsulated blowing agent,
- (b) exposing the foam precursor to a source of radiation sufficient to activate the photoinitiator and cause an exothermic reaction, and utilizing the heat from the exothermic reaction so as to cause the blowing agent to expand.
A method for producing a foam comprising:
- (a) combining an A side comprising at least one cationic epoxy component and at least one polyvinyl alcohol with a B side comprising at least one acid source component comprising at least one hydrogen donating Lewis Acid and at least one polyol while in the presence of at least one blowing agent and under conditions sufficient to substantially simultaneously with said combining provide an exothermic reaction between at least a portion of said at least one cationic epoxy and said at least one hydrogen donating Lewis Acid;
- and
- (b) utilizing heat from the exothermic reaction so as to expand the combined components to cause the blowing agent to expand thereby producing a self-supporting foam.
A method for producing a foam comprising:
- (a) combining an A side component comprising a combination comprising at least one cycloaliphatic epoxy and at least one polyvinyl alcohol with a B side component comprising a combination comprising phosphoric acid and at least one polyester polyol while in the presence of at least one encapsulated blowing agent and under conditions sufficient to substantially simultaneously with said combining provide an exothermic reaction between at least a portion of said A side and said B side;
- and
- (c) utilizing heat from the exothermic reaction so as to expand the combined components to cause the blowing agent to expand thereby producing a self-supporting foam.
Dependencies are inferred from the claim text.