| 摘要 |
FIELD: chemistry, technological processes. ^ SUBSTANCE: polymeric dispersible powders, stabilised with protective colloid, contain, (a) at least one polyvinyl alcohol with viscosity mu1 according to Heppler viscosimeter maximum 3 mPa.s, and (b) at least one polyvinyl alcohol with viscosity mu2 according to Heppler viscosimeter from 4 to 25 mPa.s, value of suspended viscosity mu"÷" of protective colloid according to Heppler viscosimeter constitutes maximum 6 mPa.s. Claimed invention also relates to method of obtaining such polymeric dispersible powders, their application in construction chemistry products, in combination with hydraulically setting binders, for instance cement, gypsum and liquid glass, to application in production of construction glues, plasters, putties, etc, as well as to application in mortars for guniting and jetcrete, used in ground and underground construction, as well as for tunnel revetment. Dispersible powders contain for their stabilisation mixture of low- and high- viscous polyvinyl alcohols, as result powders have better qualities which positively add to their processibility, such as resistance to caking, bond strength during stretching, for instance with polystyrol, redispersibility and fluidity. ^ EFFECT: good processibility of dispersible powders. ^ 10 cl, 1 tbl, 4 ex
|
