Polymere blandinger, fremgangsmaater for fremstilling, samt anvendelse av blandingene

摘要

PCT No. PCT/GB92/00868 Sec. 371 Date Jan. 15, 1993 Sec. 102(e) Date Jan. 15, 1993 PCT Filed May 14, 1992 PCT Pub. No. WO92/20727 PCT Pub. Date Nov. 26, 1992.Particulate water-soluble or water-swellable polymeric material is provided with a substantially uninterrupted continuous coating of crystalline material. Single particles or aggregates having a size below 1 mm in size can be made by mixing the polymeric particles with a substantially saturated or supersaturated aqueous solution of crystallizable material (optionally a melt of hydrate crystallizable material) and thereby depositing it as a continuous crystalline coating on the particles.