Thermoset polyester foams and manufacturing method
US10584224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2016 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Dec 26, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for manufacturing a thermoset polyester foam includes the following successive steps: (a) providing an expandable and thermosetting composition containing a polyol component including at least one element selected from glycerol, diglycerol and glycerol oligomers; a polyacid component including citric acid; a surfactant selected from alkyl polyglycosides and mixtures of an anionic surfactant and a cationic surfactant, and an esterification catalyst; (b) introducing the expandable and thermosetting composition into a mold or applying the expandable composition to a support; and (c) heating the expandable and thermosetting composition at a temperature at least equal to 135° C. so as to react the polyol component with the polyacid component and form a block of thermoset polyester foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.