Thermoset foams, and method for manufacturing same from reducing sugars and amines
US10457750B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2016 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Jul 1, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2361/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for manufacturing a solid thermoset foam includes the following successive stages: (a) providing an expandable and thermosetting composition including a first reactant chosen from reducing sugars and a second reactant chosen from primary amines, primary amine acid addition salts, secondary amines, secondary amine acid addition salts, and ammonium salts of formula Rn−(NH4+)n where n is an integer at least equal to 1 and Rn− represents the residue of an organic or inorganic acid; (b) introducing the expandable and thermosetting composition into a mold or applying the expandable composition to a support so as to form a film having a thickness at least equal to 1 mm; and (c) heating the expandable and thermosetting composition to a temperature at least equal to 140° C. to react the first reactant with the second reactant and to form, by polymerization and chemical foaming, a block of solid thermoset foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.