Method for producing a spinnable silica sol material

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United States of America Patent

PATENT NO 9518345
APP PUB NO 20140161707A1
SERIAL NO

14232857

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Abstract

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In a process for producing a spinnable silica sol material, a viscosity value VS is stipulated which the spinnable silica sol material should have after ripening. A viscosity value VR corresponding to VS which the silica sol material has before ripening is ascertained. An aqueous acid solution and a hydrolysable silicon compound are combined. The combined mixture is evaporated to give a single-phase solution while measuring the viscosity of the mixture and the evaporation process is terminated upon reaching the viscosity value VR. The single-phase solution thus obtained is then ripened to give a silica sol material with the viscosity value VS. The process exhibits reduced waste and more exact reproducibility of the spinning sol properties during the synthesis and an increased space-time yield in the production of biologically degradable and/or resorbable fibers and nonwoven fabrics.

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Patent Owner(s)

Patent OwnerAddress
JIANGSU SYNECOUN MEDICAL TECHNOLOGY CO LTDTHE FOURTH WORKSHOP CHINA MEDICAL CITY BUILDING G50 TAIZHOU 225300

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barth, Ekkehard Köln, DE 3 6
Mahr, Bastian Bergisch Gladbach, DE 5 11

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