| 摘要 |
Dump release microcapsules are formed of a water-reswellable gel having dispersed therein a sorbtive filler material having a median particle size of not more than 1 micron, such as fumed or precipitated silica. The filler material has an active substance absorbed therein and/or adsorbed thereon. The active material can be 2-chloro-6-(trichloromethyl) pyridine and the gel formed from crosslinked lignin or a lignosulphonate. |
