| 摘要 |
<p>Aqueous polymeric composition, stable in liquid form, which enables regulation of water retention, activation of whiteners and viscosity of paper sizes, comprises at least a polyvinylic alcohol (PVA) and at least a neutral or alkaline hydrosoluble polymer. Aqueous polymeric composition, stable in liquid form, which enables regulation of water retention, activation of whiteners and viscosity of paper sizes, comprises at least a polyvinylic alcohol (PVA) and at least a neutral or alkaline hydrosoluble polymer; said PVA having Ostwald viscosity less than 5 mPa.s corresponding to degree of polymerisation less than 600; and degree of hydrolysis = 70-100 mol.% measured from ester index corresponding to mol.% vinyl acetate groups = 30 - 0. Independent claims are also included for an aqueous suspension or slurry of mineral fillers containing the composition for use in paper sizes; and a sheet of paper coated with the suspension or slurry.</p> |
