| 摘要 |
PCT No. PCT/SE93/00664 Sec. 371 Date Feb. 13, 1995 Sec. 102(e) Date Feb. 13, 1995 PCT Filed Aug. 11, 1993 PCT Pub. No. WO94/05595 PCT Pub. Date Mar. 17, 1994Aqueous suspensions of colloidal particles which particles are both silica based anionic particles and swollen particles of clays of smectite type which are expandable in water and a process for the preparation thereof. The suspensions are useful as flocculating agents and particularly in combination with polymers in the production of paper. |
