Abstract:
The present invention relates to an aqueous composition for coating, such as sizing or application of a layer of a coating slip, of cellulose-based two-dimensional products. The composition has improved properties at increased temperatures and at high shear rates. These properties are achieved by using as a thickening agent a cellulose ether which is substituted with hydroxyalkyl groups, such as hydroxyethyl and hydroxypropyl, and alkyl groups having 1-3 carbon atoms, and which has a cloud point in the range from 35 C. to 80 C.
Abstract:
The present invention relates to use of an alkylhydroxyalkyl cellulose, which has alkyl groups having 1-3 carbon atoms and hydroxyalkyl groups having 2-3 carbon atoms, is free from hydrophobically modifying alkyl groups having at least 4 carbon atoms and has a turbidity point of 50-95° C. The amount of carboxymethyl cellulose constitutes up to 1200 percent by weight of the amount of alkylhydroxyalkyl cellulose. An aqueous coating composition containing a combination of alkylhydroxyethyl cellulose and carboxymethyl cellulose is also described.