储存期长、耐冷冻的高浓度MMLH胶体

LONG SHELF LIFE AND ICE TOLERENT MMLH COLLOIDAL SOLUTIONS OF HIGH CONCENTRATION

在室内研究了常规浓度（7％—10％）的MMLH胶体经长时间（最长达10个月）存放和冷冻解决后，在泥浆中提粘、提切性能的变化。筛选出了可提高液态胶体储存稳定性和耐冷冻性的两种聚合物（SW－1和SW－2）并确定了经济合理的用量。用这两种聚合物为胶体稳定剂，研制出了保持低浓度胶体性能、储存稳定性良好（SW－1和SW－2）、耐冷冻（SW－1）的高浓度（18％）MMLH胶体。

The deterioration of normal concentration (7%-10%) MMLH colloidal solutions in viscosity and yield stressenhancing capacities in clay mud after long term storing up to 10 months and after refrigeration at -15—-20℃ in 40 days are studied in detail. Two low molecular mass hydroxyl-containing nonionic polymers, SW-1 in 5% and SW-2 in 3%, are selected out as colloidal protector to improve the store stability (with both polymers) and the ice tolerency(with SW-1 only) of 7%-10% colloidal solutions and satisfactory results are obtained. By using these polymers in the same amount long shelf life and ice tolerent concentrated (18%)MMLH colloidal solutions are prepared with similar properties as for normal concentration solutions.