| 摘要 |
Method for the manufacture of water-repellent products contain a binding agent containing a Ca, characterised in that, prior to the hardening of the products; the binding agent containing Ca is mixed with an aqueous emulsion which contains: A) polysiloxane; B) an alkyl alkoxysliane; C) an emulsifying agent, in which the alkylalkoxysilane/polysiloxane weight ratio is between 21 and 40. |
