| 摘要 |
The instant invention relates to a process for the encapsulation of a non-amine hydrophilic compound C, comprising the steps of:
(E1) providing a reverse emulsion containing :
- an oil phase (O), comprising a curable mixture of isocyanate and polyalkyldiene hydroxylated or polyol
- dispersed in said oil phase, drops of an aqueous phase W 1 , containing :
ˆ˜ said non-amine hydrophilic compound C ; and
ˆ˜ at least 5% by weight of a compound C' carrying more than 2 amine groups ;
ˆ˜€ƒ
(E2) pouring the reverse emulsion of step (E1) in a second water phase W 2 to make a multiple emulsion water/oil/water ;
and, then,
(E3) curing into polyurethane all or part of the curable mixture contained in the oil phase. |
