D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 17/29 (2006.01) D21H 21/16 (2006.01)
Patent
CA 2279292
The invention relates to a method for internal sizing of paper using cationic starch. The starch used is cationized with a mixture of epichlorhydrin, trimethylamine, and mono- or dimethylamine or N,N,N',N'- tetramethylethylenediamine. Cationizing results in a higher molecular size of the starch, which has e.g. a beneficial effect on dewatering on the paper machine forming wire.
L'invention concerne un procédé de collage interne de papier au moyen d'amidon cationique. L'amidon utilisé est cationisé à l'aide d'un mélange d'épichlorhydrine, de triméthylamine et de mono ou diméthylamine ou de N,N,N',N'-tétraméthyléthylènediamine. La cationisation permet d'augmenter la taille moléculaire de l'amidon, ce qui a un effet bénéfique sur l'essorage sur la toile de formation de la machine à papier.
Andersson Tuija
Karppi Asko
Ketola Hannu
Laakso Sauli
Likitalo Antti
Ciba Specialty Chemicals Holding Inc.
Mccarthy Tetrault Llp
Raisio Chemicals Oy
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