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| Number | Title | Issue Date |
| 4921842 | Process for the production of aqueous polyurethane dispersions The present invention relates to a process for the continuous production of aqueous polyurethane dispersions, i.e. dispersions or suspensions both of pure polyurethanes and of polyurethane ureas, by mixing a product, which has been obtained by reaction of... | 05/01/1990 |
| 4915509 | Mixer for mixing at least two free-flowing substances, especially those which react during mixing The present invention is directed to a mixer for mixing at least two free-flowing, reactive or unreactive substances comprising (a) a casing having at least two inlets and at least one outlet, (b) a rotatable shaft extending through the casing, (c) at least one rot... | 04/10/1990 |
| 4882411 | Process for the production of cold-setting polyurethane urea elastomers The present invention relates to a process for the production of polyurethane urea elastomers from (a) NCO-terminated prepolymers based on polyisocyanates and polyethers having a molecular weight of 400 to about 10,000 and an ethylene oxide content of abo... | 11/21/1989 |
| 4882409 | Process for the production of heat-resistant polyurethane urea elastomers The present invention is directed to a process for the production of a polyurethane urea elastomer which comprises preparing a heterogeneous mixture of (a) a diaminodiphenylurea corresponding to the formula ##STR1## wherein R1, R2 | 11/21/1989 |
| 4882363 | Process for the production of polyurethane foam moldings The present invention relates to a process for the production of fluorocarbon-free, rigid polyurethane foam moldings having a gross density of at least 300 kg/m3 by in-mold foaming of a reaction mixture based on (a) a polyisocyanate component c... | 11/21/1989 |
| 4882361 | Process for the production of polyurethane urea elastomers The present invention is directed to a process for the production of compact or cellular, elastomeric moldings having a compact skin based on polyurethane urea elastomers prepared from (a) organic polyisocyanates, (b) relatively high molecular weight polyhydro... | 11/21/1989 |
| 4879322 | Continuous process for the production of aqueous polyurethane urea dispersions The present invention is directed to a continuous process for the production of aqueous polyurethane-urea dispersions by (a) mixing an emulsifiable isocyanate-terminated prepolymer with an aqueous medium in a low shear, stator-rotor dynamic mixer operating at ... | 11/07/1989 |
| 4876302 | Polyurethane dispersions and the use thereof as finishing agents The present invention is directed to aqueous coating compositions suitable for use as coating and finishing agents for surface coatings, preferably PVC or polyurethane coatings, based on sedimentation-stable polyurethane dispersions having a solids conten... | 10/24/1989 |
| 4874797 | Oligourea polyols, polyether polyols produced from them and the use of these polyols in the isocyanate polyaddition process The present invention is directed to novel polyhydroxyalkyl oligoureas prepared by condensing urea derivatives with polyamides. The present invention is further directed to polyether polyols prepared by alkoxylating these polyhydroxyalkyl oligoureas. Fina... | 10/17/1989 |
