The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2014
Filed:
Dec. 30, 2009
Hannu Mikkonen, Vtt, FI;
Kaisa Putkisto, Vtt, FI;
Soili Peltonen, Vtt, FI;
Sari Hyvärinen, Vtt, FI;
Kimmo Koivunen, Aalto, FI;
Hannu Mikkonen, Vtt, FI;
Kaisa Putkisto, Vtt, FI;
Soili Peltonen, Vtt, FI;
Sari Hyvärinen, Vtt, FI;
Kimmo Koivunen, Aalto, FI;
Teknologian Tutkimuskeskus VTT, Espoo, FI;
Abstract
Particles of a polysaccharide derivative, having at least one substituent with conjugated unsaturated bonds and exhibiting an index of refraction in excess of 1.50 and a method for the production thereof. In the method, the raw-material is suspended in an organic solvent to form a suspension, which is contacted with an organic reactant comprising a residue with conjugated unsaturated bonds; the raw-material and the organic reactant are reacted to form a derivative exhibiting ester or ether bond between the raw-material and the residue with conjugated unsaturated bonds; the polysaccharide derivative is dissolved in a solvent to form a solution; and the solution is contacted with a non-solvent to precipitate particles of the polysaccharide derivative. The invention provides lightweight, optically improved organic pigments and fillers based on renewable resources and which are recyclable by combustion or composting.