FIELD: chemistry.
SUBSTANCE: invention relates to a method for swelling polymeric microspheres capable of swelling. Swelling method of swellable polymeric microspheres includes the manufacture of a binding composition or a binding product comprising a composition comprising (i) bringing an aqueous slurry containing non-swollen, swellable polymeric microspheres into contact with steam, directly before and/or during the manufacture of the binding composition; (ii) optionally pre-wetting the swollen polymer microspheres; and (iii) incorporating the swollen polymeric microspheres into the binding composition, where the swollen polymeric microspheres have an average diameter that is from 40 to 216 mcm, and the aqueous suspension optionally further comprises an additive for the binding composition, and non-swollen, swellable polymeric microspheres have an average diameter that is 100 mcm or less.
EFFECT: technical result is the creation in the binding compositions of voids with controlled dimensions, increasing the strength.
14 cl, 5 dwg, 4 ex
