The present invention relates to cellulose ether compounds for increasing the open time and improving the wettability of cement-based mortars. The inventive cellulose ether compounds are formed from cellulose ether with one or more liquid antifoams incorporated therein. The inventive cellulose ether compounds are preferably used as modified cellulose ether in dry mortars for increasing the open time.

The invention relates to temporary cross-linked cellulose ethers, a process to make them, as well as their use to influence the rheological profile of an aqueous medium in which they are dissolved. The temporary cross-linked cellulose ethers are characterized in that they are cellulose ethers that are Cross-linked with at least one or more compounds of the formula (C.sub.1-4 alkyl)-OC(O)CHOHO(C.sub.1-4 alkyl).

The disclosure provides a modified chitosan, a preparation method thereof, and an additive for a tile adhesive, and belongs to the technical field of building additives. In the disclosure, chitosan, an inorganic base, a dispersant having a hydroxyl group and an etherifying agent are added at one time, avoiding the tedious operation of adding inorganic alkali or etherifying agent multiple times. In addition, the etherification reaction is continuously performed under the conditions of gradual temperature increase and pressure increase.

The disclosure provides a modified chitosan, a preparation method thereof, and an additive for a tile adhesive, and belongs to the technical field of building additives. In the disclosure, chitosan, an inorganic base, a dispersant having a hydroxyl group and an etherifying agent are added at one time, avoiding the tedious operation of adding inorganic alkali or etherifying agent multiple times. In addition, the etherification reaction is continuously performed under the conditions of gradual temperature increase and pressure increase.

The present invention relates to new aqueous binder compositions comprising an aqueous curable binder composition comprising starting materials required for forming a thermoset resin upon curing and a matrix polymer, wherein the starting materials required for forming a thermoset resin upon curing comprise (i) a polyhydroxy component and a polycarboxylic acid component, or an anhydride, ester or salt derivative thereof and/or reaction product thereof, or (ii) a carbohydrate component and a nitrogen containing component and/or a reaction product thereof.

The present invention relates to new aqueous binder compositions comprising an aqueous curable binder composition comprising starting materials required for forming a thermoset resin upon curing and a matrix polymer, wherein the starting materials required for forming a thermoset resin upon curing comprise (i) a polyhydroxy component and a polycarboxylic acid component, or an anhydride, ester or salt derivative thereof and/or reaction product thereof, or (ii) a carbohydrate component and a nitrogen containing component and/or a reaction product thereof.

The present invention relates to new aqueous binder compositions comprising an aqueous curable binder composition comprising starting materials required for forming a thermoset resin upon curing and a matrix polymer, wherein the starting materials required for forming a thermoset resin upon curing comprise (i) a polyhydroxy component and a polycarboxylic acid component, or an anhydride, ester or salt derivative thereof and/or reaction product thereof, or (ii) a carbohydrate component and a nitrogen containing component and/or a reaction product thereof.