Water-soluble and spinnable polyurethane elastomer prepared based on RIM technology

The invention provides a water-soluble and spinnable polyurethane elastomer prepared based on the RIM technology. A linear polymer is prepared from potential hydrophilic group-containing dibasic alcohol components and diisocyanate components through the RIM technology. Because the elastomer contains a potential hydrophilic group, water-soluble and water-insoluble mutual conversion can be realized on the premise that main chains of molecules are not damaged; before being released, the hydrophilic group is a non-hydrophilic elastomer which can be used for spinning of island fiber sea components; after being released, the hydrophilic group is a water-soluble high molecular compound which can be subjected to reduced fibrillation under mild conditions; and after being sealed, the hydrophilic group is water-insoluble, so that recovery can be realized under mild conditions. Organic solvents or waste water containing organic matters are not generated in the processes, thereby being favorable for environmental protect