C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 33/152 (2006.01) A61K 9/00 (2006.01) C01B 33/157 (2006.01)
Patent
CA 2679139
The present invention relates to a method for producing a flowing silica composition comprising a sol-gel transfer, wherein redispersion is carried out. The redispersion comprises adding, after having reached gel point of said sol-gel transfer, liquid into the gel formed by the sol-gel transfer, and the adding being made within a sufficiently short time period after reaching the gel point, to result, after mixing to follow of the gel and the liquid, in a rheologically homogenous flowing silica composition, which is and remains injectable as such, or by short stirring < 30 s, through a thin 22G needle. The present invention also relates to flowing silica compositions and gels obtainable by methods of the invention. The present invention further relates to uses of flowing silica compositions.
L'invention porte sur une méthode de production d'une composition de silice fluide comprenant un transfert sol-gel où s'effectue la redispersion. La redispersion consiste à ajouter après avoir atteint le point de gel du transfert sol-gel du liquide dans le gel ainsi formé, l'adjonction se faisant dans une période suffisamment courte après avoir atteint le point de transfert sol-gel, pour donner après le mélange du gel et du liquide une composition de silice fluide de rhéologie homogène, étant et restant injectable comme telle, ou après une courte agitation < 30 s, par passage dans une aiguille fine de 22G. L'invention porte également sur des compositions et gels de silice fluide obtenus par la méthode de l'invention, et sur leurs utilisations.
Forsback Ari-Pekka
Jalonen Harry
Jokinen Mika
Koskinen Mika
Delsitech Oy
Robic
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