| abstract |
The present invention relates to a flexible sheet-like substrate having an abrasive surface, wherein an aqueous solution or dispersion of one or more pre-condensates of the thermosetting resin is applied to the top and / or bottom of the flexible sheet-like substrate, , 0.1 to 90% by weight, crosslinking the pre-condensate, and drying the treated substrate, wherein the aqueous solution or dispersion of one or more pre-condensates of the thermosetting resin comprises (i) A polymeric thickener selected from the group consisting of biopolymers, associative thickeners and fully synthetic thickeners in an amount ranging from 0.01 to 10% by weight, and optionally (ii) catalyzed further condensation of the thermosetting resin from about 60 < And a curing agent. |