Method of adding boric acid or a borate to a mixing or...

C - Chemistry – Metallurgy – 07 – F

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260/221, 260/233

C07F 5/04 (2006.01) C07C 215/08 (2006.01) C07H 23/00 (2006.01) C08B 31/06 (2006.01) C09J 103/02 (2006.01)

Patent

CA 1312327

ABSTRACT A process which includes the step of adding boric acid or a borate such as borax to a mixing or reaction zone, e.g. to a starch glue preparation in which the boric acid or borate is added in the form of a liquid composition containing monoethanolamine or a polyhydroxyorganic compound such as glucose and optionally, but preferably, water. The processes of particular utility in the preparation of starch-based adhesives in which boric acid or borax decahydrate is metered continuously into the adhesive, which itself is essentially an aqueous starch composition. The method overcomes the problem of formation of lumps in the solid boric acid or borax decahydrate which impedes the continuous addition and metering of these materials as a finely divided solid.

587936

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