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:
Dec. 03, 2013
Filed:
Oct. 01, 2004
Soili Peltonen, Rajamäki, FI;
Hannu Mikkonen, Rajamäki, FI;
Pia Qvintus-leino, Espoo, FI;
Petri Varjos, Helsinki, FI;
Kirsi Kataja, Helsinki, FI;
Soili Peltonen, Rajamäki, FI;
Hannu Mikkonen, Rajamäki, FI;
Pia Qvintus-Leino, Espoo, FI;
Petri Varjos, Helsinki, FI;
Kirsi Kataja, Helsinki, FI;
Valtion Teknillinen Tutkimuskeskus, VTT, FI;
Abstract
The present invention relates to a light, biodegradable, organic pigment and filler, and a method of manufacturing it. According to the present invention, a solution comprising a starch derivative is first prepared by dissolving the starch derivative into a suitable solvent, and, after that, the solution is brought into contact with a non-solvent to precipitate the starch derivative from the solvent, and, as a result, a dispersion is obtained, one which comprises a precipitate consisting of starch derivative and a liquid phase formed of the solvent and the non-solvent, after which the solvent is removed from the liquid phase and the precipitate is separated from the non-solvent and recovered. The present invention can be used to manufacture both a product comprising 100-300 nm spherical particles, which is suitable for use as a pigment, and a coral-like, porous product which is particularly suitable as a filler.