Patent · US Active

Method to disperse nano-cellulose in organic polymer precursors

US11186689B2 · kind B2 · utility

0Cited by

1References

12Claims

0Family size

Assignee

NORSKE SKOG SAUGBRUGS AS · NO

Inventors

Mikael Nordeng · Oslo, NO
Stein Dietrichson · Fredrikstad, NO
Joachim Karthauser · Sollentuna, SE

Key dates

Filing date	Aug 13, 2019
Grant date	Nov 30, 2021
Priority date	—
Expiry date	Nov 25, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2401/02
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

This invention concerns a novel method to produce thermosets such as epoxies and polyurethanes comprising nano-cellulose. The method comprises contacting primarily water-bourne dispersed nano-cellulose with liquid thermoset precursors, specifically epoxy or amine in the case of epoxies, or glycols or similar in the case of polyurethanes. Nano-cellulose transfers to the organic phase, and water is removed at temperatures below 100° C. Thereafter the organic phase comprising nano-cellulose can be mixed with the reactive counterpart to yield nano-composites with improved properties. The products can be used for composite articles, coatings, adhesives, sealants, and other end-uses. Preferred embodiments are described in detail.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.