| 摘要 |
The invention concerns a method for preparing an anti-foaming emulsion from a silicon anti-foaming phase, containing at least a linear polyorganosiloxane oil and at least one mineral filler, to be emulsified in an aqueous phase containing polyvinyl alcohol. The invention is characterised in that the silicon anti-foaming phase is introduced into the aqueous phase in several steps, the method comprising a first step consisting in pouring part of the silicon anti-foaming phase into the aqueous phase, then, after shaking out for some time, a second step consisting in pouring while shaking out the whole or part of the remaining silicon anti-foaming phase, this pouring of the silicon anti-foaming phase being preceded or accompanied by addition of water.
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