Process for sizing cellulose fibres
AssigneeKemaNord AB
InventorsKarin Ulla Elisabet Helmer, Berit Ingegard Simonsson
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Abstract
The present invention relates to a process for sizing cellulose fibers or cellulose fiber-containing materials by using modified starch containing hydrophobic groups having the general formula ##EQU1## wherein R.sub.1 is an organic, hydrophobic hydrocarbon group having 8-40 carbon atoms and R.sub.2 is a C.sub.1 -C.sub.8 alkyl group or has the same meaning as R.sub.1.
Claims8
A process for preparing hydrophobic paper products by bringing an aqueous suspension of cellulose fibers or a paper product into contact with a sizing agent and thereafter effecting drying, said sizing agent being a modified starch containing hydrophobic group having the general formula ##EQU3## wherein R.sub.1 is an organic, hydrophobic hydrocarbon group having 8 to 40 carbon atoms and R.sub.2 is either a C.sub.1 -C.sub.8 alkyl group or has the same meaning as R.sub.1, said modified starch being prepared by reacting starch with a carbamoyl chloride having substituents R.sub.1 and R.sub.2 as defined above.
Dependencies are inferred from the claim text.