prov:value
| - The solvent used for preparing the dispersion according to U.S. Pat. Nos. 3,388,087; 3,480,592 and 3,479,310 therefore, need not be removed from the resulting dispersion and, moreover, high boiling solvents such as dimethylformamide may also be included when preparing the dispersion, as already described in connection with the preparation of ionic polyurethane polysiloxane dispersions.
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