COMPOSITION AND METHOD OF PRODUCING POLYMER HYDROPHILIC MICROFILTRATION MEMBRANE Russian patent published in 2012 - IPC B01D71/68 C08L81/06 C08K5/09 C08L39/06 C08L77/02 

FIELD: process engineering.

SUBSTANCE: invention relates to membrane equipment and may be used for fine filtration of diverse fluids in food industry, pharmaceutics, and medicine. Proposed composition comprises poly(arylene sulphone) in amount of 100 wt %, polyvinylamide in amount of 1.25-6.67, organic acid with ionisation constant of 1.8·10^-5-6.0·10^-2 - 200-300, and organic solvent in amount of 360-848.8 wt %. To obtain membrane, poly(arylene sulphone) and polyvinylamide are dissolved in organic solvent whereto organic acid is added additionally. Produced moulding solution is applied on moving surface at the rate of 0.5-1.5 m/min and cured in air at fixed relative humidity of air. Moulding is performed in precipitation bath containing 10-90% of water and 10-90% of one- or polyhydric alcohols.

EFFECT: higher strength and efficiency.

2 cl, 5 ex