| http://www.w3.org/ns/prov#value | - However, the prepolymer mixing process is a simple and efficient preparation processhaving a large synthetic range, which is very advantageous in many cases.In the solvent process or acetone process, the complete synthesis of the polyurethane polymers is carried out in the presence of large amounts of low-boiling and water-soluble solvents, such as, for example, acetone or methyl ethyl ketone.
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