| 摘要 |
<p>This invention concerns a polymer blend having a water-soluble cellulose ether and a water-insoluble, but water-dispersible polymer which is useful in thin-bed mortar compositions. The water insoluble, but water-dispersible polymer can include an unneutralized polyacrylic acid or methylcellulose with a viscosity from 50 cps to 150,000 cps. The polymeric blend extends the working time of the composition in which it is employed and because the blend has sag binding characteristics, it also functions as a sag resistance aid.</p> |
