FIELD: manufacturing technology.
SUBSTANCE: present invention relates to use of the capsule as an additive for hydraulic composition the wall of the capsule contains a layer containing a water-soluble polymer, which includes a film-forming polymer, which is polyvinyl alcohol, having a melting point of 155–185 °C and melt flow rate of more than 3.0 g/10 min under 2.16 kg at 230 °C, measured according to the method described in the standard NFT 51-016, the additive for hydraulic composition is in the wall of the capsule. Invention also relates to a method of producing hydraulic composition and to design of capsule.
EFFECT: reduced dusting, increased storage time without change of properties of additives.
11 cl, 12 tbl, 4 ex
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