C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
C08B 31/04 (2006.01) C08B 31/00 (2006.01) C08B 31/18 (2006.01) D21H 17/28 (2006.01) D21H 19/54 (2006.01)
Patent
CA 2302567
The present invention relates to a process for the preparation of a stable, chlorine free modified starch which is useful in paper coating and sizing. In the process, starch is degraded by catalyzed hydrogen peroxide oxydation, and stabilized by acetyl esterification, combined with cross-linking of the starch.
La présente invention concerne un procédé de préparation d'un amidon modifié stable et exempt de chlore, s'utilisant dans le couchage et le collage de papier. Dans le procédé selon l'invention, on dégrade de l'amidon par oxydation de peroxyde d'hydrogène catalysé, puis on le stabilise par estérification d'acétyle, ces opérations étant combinées avec une réticulation de l'amidon.
Hagberg Peggy
Ketola Hannu
Ciba Specialty Chemicals Holding Inc.
Mccarthy Tetrault Llp
Raisio Chemicals Oy
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