Stable suspension of hydrocolloids

Details Stable suspension of hydrocolloids Stable suspension of hydrocolloids

C - Chemistry, Metallurgy

04

B

C04B 24/38 (2006.01) C04B 40/00 (2006.01) C09K 8/04 (2006.01) C09K 8/20 (2006.01) C09K 8/22 (2006.01) C09K 8/46 (2006.01)

Patent

CA 2223731

The present invention comprises a stable hydrocolloid composition in which a hydrocolloid, preferably welan gum, is uniformly dispersed in a superplasticizer such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. This is then dispersed in a rheological control agent which is a microbially-produced cellulose fiber composition. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications, insulation fluids and de-icer compositions.

L'invention concerne une composition stable d'hydrocolloïde dans laquelle un hydrocolloïde, de préférence de la résine de welan, est dispersée de manière homogène dans un superplastifiant, tels que le naphtalène sulfoné, la mélamine sulfonée, le lignosulfate modifié, leurs dérivés et leurs mélanges, puis dispersée dans un agent régulateur rhéologique qui est une composition de fibres de cellulose produites par des microbes. La composition peut être rapidement hydratée et est utile comme additif stabilisateur dans de nombreuses applications de ciment et de fluide de forage, dans des fluides isolants et dans des compositions de dégivrage.

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