Aqueous polyurethane dispersions based on polyether polyols of low monol content
Patent 5576382 Issued on November 19, 1996. Estimated Expiration Date: May 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
524/591, Water DNRM524/538, Solid polymer or SICP derived from at least one nitrogen-containing carboxylic acid or derivative reactant or from a carboxylic acid or derivative and a polyamine524/839, Solid polymer or SICP derived from -N=C=X (X is chalcogen) containing reactant524/840, N=C=X reactant has ionic group attached thereto, e.g., carboxyl sulfonic, etc.528/60With reactant compound containing three or more XH, -C(=X)-XH, -NH, =NH, or HNH groups or combination thereof
Aqueous polyurethane dispersions prepared from chain extended polyurethane prepolymers which are the reaction product of a di- or polyisocyanate, a polyol component containing, in major part, a polyoxypropylene diol having an unsaturation of 0.020 meq/g or less, and a reactive dispersing aid, are suitable for preparing polyurethane films with greater softness and elasticity than similar films prepared from PTMEG, and greater tensile strength and elasticity than polyoxypropylene diols having conventional levels of unsaturation.
Other References
"Hexacyanometalate Salt Complexes as Catalysts for Epoxide Polymerizations", R. J. Herold and R. A. Livigni Advances in Chemistry Series No. 128, Polymerization Kinetics and Technology (1973), pp. 208-229
"Preparation of High Molecular Weight Polyols Using Double Metal Cyanide Catalysts", J. L. Schuchardt and S. D. Harper, 32nd Ann. Polyurethane Technical/Marketing Conference, Oct. 1-4, 1989, pp. 360-363
"Urethane Applications for Novel High Molecular Weight Polyols", R. L. Mascioli, 32nd Ann. Polyurethane Technical/Marketing Conference, Oct. 1-4, 1989 pp. 139-142
"Polyurethane Sealants and Cast Elastomers with Superior Physical Properties", J. W. Reisch and D. M. Capone, 33rd Ann.Polyurethane Technical/Marketing Conference, Sep. 30-Oct. 3, 1990, pp. 368-374
"Thermoplastic Polyurethane Elastomers Made from High Molecular Weight POLY-L™ Polyols", C. P. Smith, et al, Polyurethanes World Congress 1991, Sep. 24-26, 1991 pp. 313-318
"Comparison of the Dynamic Properties of Polyurethane Elastomers, etc.", A. T. Chen, et al, Polyurethanes World Congress 1993, Oct. 10-13, 1993 pp. 388-399
Odian, Principles of Polymerization, 1981, pp. 20-21, John Wiley & Son
May 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
