Polyurethane foams with agricultural by-products
US10844159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2017 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Aug 1, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0075
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of producing a polyurethane based foam that includes providing a ground crop residue having an average particle size of less than 10 mm and that is prepared by grinding crop residues, providing a polyurethane system that includes an isocyanate component and an isocyanate-reactive component, of which the polyurethane system has an isocyanate index from 70 to 350, forming a modified polyurethane system by adding the ground crop residue to the polyurethane system in a range from 1.0 wt % to 20.0 wt %, based on a total weight of the modified polyurethane system, and forming the polyurethane based foam so as to have an applied density from 30 kg/m3 to 75 kg/m3, according to ASTM D-1622, and to have the ground crop residue embedded within polyurethane polymers that are a reaction product of the isocyanate component and the isocyanate-reactive component of the polyurethane system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.