| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to water-soluble powdered polymer compositions, which in powdered form can be used for direct addition to aqueous systems to obtain homogeneous, lump-gree solutions. Storage-stable composition of cellulose ether, which is dispersed in water without formation of lumps, includes a) a crosslinked cellulose ether crosslinked with a cross linker having a first reactive moiety and a second reactive moiety, said first reactive moiety being an aldehyde; and b) a partially neutralised polybasic carboxylic acid, effective for endowing said cellulose ether, crosslinked by said cross linker, with dissolution stability at temperature of 60 °C for at least 3 days.EFFECT: selected acid has no adverse effect on dissolution stability.19 cl, 7 dwg, 1 tbl |
