Formaldehyde free binder and multi-component nanoparticle
US11453798B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2013 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Aug 28, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B7/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This patent describes formaldehyde free or formaldehyde reduced binders useful, for example, in a fiber based composite material such as glass or other mineral fiber insulation, non-woven fabric or wood-based board. In one example, melamine is used as an acidic solution or a salt. The salt or solution is used to create an aqueous binder with other components such as a polyol and a crosslinker. A preferred polyol is a nanoparticle comprising high molecular weight starch. In other examples, binders include mixtures of a polyol with urea and a crosslinker. In other examples, a multi-component nanoparticle is made by reacting a polyol such as starch in an extruder with an insolubilizer such as melamine or urea. The resulting particles are mixed with water, optionally with other components such as an additional crosslinker, to create an aqueous binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.