WATER-BASED EPOXIDIZED LIGNIN AND PROCESS FOR ITS PRODUCTION AND ITS USE AS PHENOL-FORMALDEHYDE REPLACEMENT IN ADHESIVES AND CROSS-LINKERS

The invention is the synthesis and use of epoxidized lignin (EL) preferably with but also without colloidal lignin nanoparticles (CLP, plural CLPs). The invention is divided in two parts, synthesis and utilization. The synthesis of the invention is performed in the following general steps: Preparati...

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Bibliographische Detailangaben
Hauptverfasser:	FORSSELL, Susanna, HENN, Alexander, FORSMAN, Nina, BANGALORE ASHOK, Rahul Prasad, ÖSTERBERG, Monika, KHALATI, Elham, OINAS, Pekka
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention is the synthesis and use of epoxidized lignin (EL) preferably with but also without colloidal lignin nanoparticles (CLP, plural CLPs). The invention is divided in two parts, synthesis and utilization. The synthesis of the invention is performed in the following general steps: Preparation of an aqueous solution of lignin and a base. Combining the lignin solution with epichlorohydrin at 1 - 90 °C, where the amount of epichlorohydrin should be within 1 - 20 ml per gram of lignin. Allowing the epoxidation reaction to take place between 1 minutes to 5 hours, while stirring the mixture. Removal of excess epichlorohydrin from epoxidized lignin solution by e.g. solvent extraction. Separation of EL from the aqueous solution. EL functions as a cross-linker and may be used e.g. to prepare adhesives, surface coatings, and composite materials. EL may also be used as foaming agent in water-based solutions.