Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7232876 | Phosphorus-containing urethane(meth)acrylate compounds and photosensitive compositions A phosphorus-containing urethane (meth)acrylate compound obtained by reacting (A) a polyol compound comprising (A1) a phosphorus-containing polyol having a phosphorus atom, with (B) a bifunctional or greater polyisocyanate and (C) a hydroxyl group-containing (meth)a... | 06/19/2007 |
| 7202322 | Heat resistant high moisture vapor transmission thermoplastic polyurethane A thermoplastic polyether polyurethane having high moisture vapor transmission, high melting point and static dissipative properties is disclosed. The thermoplastic polyether polyurethane is prepared by reacting a hydroxyl terminated polyether intermediate, an aroma... | 04/10/2007 |
| 7015299 | Melt spun thermoplastic polyurethanes useful as textile fibers Melt spun thermoplastic polyurethane polymers useful as textile fibers and having good tenacity and recovery and substantially no gelation are disclosed. The polymers are prepared by a three-step polymerization process including: preparation of “hard” segment ol... | 03/21/2006 |
| 7001976 | Water-soluble fiber and a method for manufacture therefor This invention relates to a water-soluble fiber and a method of manufacturing the fiber. The water-soluble fiber of the invention is composed of a high molecular compound with a weight average molecular weight of not less than 10,000, which high molecular compound i... | 02/21/2006 |
| 6984708 | Spandex of a particular composition and process for making same The invention provides spandex having improved hysteresis and a method for making such spandex. The spandex of the invention comprises the polyurethaneurea reaction product of: (a) poly(tetramethylene ether) glycol | 01/10/2006 |
| 6964626 | High temperature polyurethane/urea elastomers The present invention relates to molded polyurethane/urea elastomers, and specifically to improved polyurethane/urea elastomers having high temperature stability to about 140–150° C. and low temperature flexibility at about −35–(−40)° C., for use in dynami... | 11/15/2005 |
| 6956074 | Polyurethane composition There is a provided a polyurethane composition, which exhibits an excellent property of preventing discoloring or coloring not only by oxidized nitrogen gases but also by heat, characterized in that (A) a hindered phenol antioxidan... | 10/18/2005 |
| 6916896 | High productivity spandex fiber process and product Commercially acceptable spandex can be prepared with greater efficiency, improved consistency and at lower costs from a high-solids content polyurethaneurea polymer solution. The polyurethaneurea is prepared using a combination of 4,4′-MDI and 2,4′-MDI, and an a... | 07/12/2005 |
| 6906163 | Prepolymer catalysts suitable for preparing spandex fibers Segmented polyurethane/ureas useful for the production of spandex, particularly spandex fibers, are made from isocyanate-terminated prepolymers formed by reacting excess isocyanate with an isocyanate-reactive component satisfying specified compositional requirements... | 06/14/2005 |
| 6903179 | Polyurethane/ureas useful for the production of spandex and a process for their production Segmented polyurethane/ureas useful in the production of spandex are produced by chain extending an isocyanate-terminated prepolymer in the presence of a solvent. The isocyanate-terminated prepolymer is formed by reacting a stoichiometric excess of an isocyanate wit... | 06/07/2005 |
| 6780958 | Spandex compositions The invention provides an improved spandex that is prepared from a polyurethane that is the reaction product of organic diisocyanates, polymeric glycols, and polyols that have an aromatic functionality, such as alkoxylated phenols. The spandex has improved resistanc... | 08/24/2004 |
| 6737497 | Polyurethane/ureas useful for the production of spandex and a process for their production Segmented polyurethane/ureas useful in the production of spandex are produced by chain extending an isocyanate-terminated prepolymer with a diamine chain extender that includes: (1) from about 7 to 25 equivalent percent of an asymmetric aliphatic and/or cycloaliphat... | 05/18/2004 |
| 6720403 | Polyurethaneurea and spandex comprising same Spandex having good whiteness retention, high heat-set efficiency, and percent set is made from comprises amide soluble polyurethaneurea polymers prepared by reacting polyether which comprises the reaction product of a polymeric glycols with ortho-substituted diisoc... | 04/13/2004 |
| 6660825 | Lactone polyester diol, polyurethane obtained therefrom, and spandex filament thereof The present invention can provide a lactone polyester diol at least containing &3xb5;-caprolactone and a dibasic acid as constructing component units, and a polyurethane obtained using the diol and an organic diisocyanate can provide a spandex filament wh... | 12/09/2003 |
| 6639041 | Spandex having low set at low temperatures A low set (at low temperatures) spandex, based on copoly(alkylene ethers), which are copolymers containing tetramethylene ether and either ethylene ether or 1,2-propylene ether moieties, is provided.... | 10/28/2003 |
| 6624281 | Polyurethane/ureas useful for the production of spandex and a process for their production Segmented polyurethane/ureas useful for the production of spandex are produced by chain extending, in the presence of a solvent, an isocyanate-terminated prepolymer prepared by reacting a stoichiometric excess of an isocyanate with an isocyanate-reactive ... | 09/23/2003 |
| 6503996 | High-uniformity spandex and process for making spandex The invention provides a highly uniform spandex fiber and a method for making it. The polyurethaneurea component of the spandex has both alkylurethane and monoalkylurea ends, with a ratio of monoalkylurea ends to alkylurethane ends of from 0.5:1 to 10:1.... | 01/07/2003 |
| 6500911 | Polyester diol and derived polyurethane and acrylic copolymer The invention provides polyester dials suitable for preparation of polyurethanes, and provides polyurethanes derived therefrom. The invention also provides spandex filaments prepared from these polyurethanes, which exhibit improved elasticity, tensile str... | 12/31/2002 |
| 6485665 | Method for producing polyurethane elastomer fibers and fibers produced according to this method Polyurethane elastomer fibers with superior mechanical and heat distortion properties are obtained by a method in which (a) a segmented polyurethane polymer is produced on the basis of a macro-diol, an aliphatic diisocyanate, and a chain extender with at least... | 11/26/2002 |
| 6472494 | Spandex with high heat-set efficiency A high heat-set efficiency, high unload power spandex, based on a polyurethaneurea prepared from a polyether glycol, mixtures of 2,4'-MDI and 4,4'-MDI, and chain extenders, is provided.... | 10/29/2002 |
| 6458866 | Polyurethane elastomers, method of producing them and their use The invention concerns a polyurethane elastomer containing structural units of type (a), in which: the group --O--R1 --O--is a macrodiol group with a molecular weight of approximately 500 to 10000, R2 is a bivalent aliphatic, cycloal... | 10/01/2002 |
| 6277942 | Melt-spun elastomeric fibers and the preparation thereof Novel melt-spun elastomeric fibers and methods for their preparation. Embodiments are provided in which fibers are melt-spun from a melt-spinnable elastomeric polymer comprising a diisocyanate-capped polyol prepolymer which is chain-extended with an aroma... | 08/21/2001 |
| 6252031 | Production process for producing polyurethane elastic material and elastic yarn A process for producing a polyurethane elastic material or polyurethane elastic yarn from a first polymer diol having a molecular weight of 600 or more, a second polymer diol having a molecular weight of 600 or more, a first low molecular weight diol havi... | 06/26/2001 |
| 6225435 | Stable polyurethaneurea solutions A viscosity-stable solution of a polyurethaneurea, in the substantial absence of viscosity stabilizers, and spandex dry-spun therefrom, prepared from certain polyether glycols and aliphatic diisocyanates and ethylene diamine, are provided.... | 05/01/2001 |
| 6197915 | Thermoplastic polyurethanes, polyurethane elastic fibers therefrom, and method for producing the fibers The invention relates to thermoplastic polyurethanes obtainable by reacting a polyol composition (A) which consists essentially of a polyester-polyol (A-1) having a crystallization enthalpy of at most 70 J/g and a number-average molecular weight of from 1... | 03/06/2001 |
| 6127506 | Process for melt spinning spandex A process for melt spinning spandex, utilizing a polyurethaneurea polymer prepared from a purified capped glycol, linear aliphatic diamines and a monoamine chain terminator, is provided.... | 10/03/2000 |
| 6100360 | Process for preparing a polyurethane elastic fiber A polyurethane elastic fiber is prepared from a polyurethane prepolymer by reaction extruding the polyurethane prepolymer and a chain extender, preferably with twin-screw extruder, and melt spinning the resulting polyurethane elastomer from the extrusion.... | 08/08/2000 |
| 6093783 | Water-soluble fiber and a method for manufacture thereof This invention relates to a water-soluble fiber and a method of manufacturing the fiber. The water-soluble fiber of the invention is composed of a high molecular compound with a weight average molecular weight of not less than 10,000, which high molecular... | 07/25/2000 |
| 6063892 | Spandex prepared with hindered diisocyanates Polurethaneaureas prepared with 2,2-bis(4-isocyanatophenyl)propane or 1,4-bis(4-isocyanato-alpha,alpha-dimethylbenzyl)benzene, and spandex spun from such polyurethaneureas, are provided.... | 05/16/2000 |
| 5981686 | Spandex made with 1,3-diaminopentane A polyurethaneurea polymer and spandex spun therefrom, based on polymeric ester or ether glycols and MDI at certain capping ratios, and 1,3-diaminopentane chain extender, are provided.... | 11/09/1999 |
| 5962619 | Process for making clear polyurethane/urea elastomers A process for making clear elastomers is disclosed. First, a polyol having a narrow molecular weight distribution (Mw/Mn | 10/05/1999 |
| 5959059 | Thermoplastic polyether urethane A thermoplastic polyether polyurethane having good rebound resilience and low hysteresis properties is prepared by the reaction of a diisocyanate with a hydroxyl terminated polyether having a weight average molecular weight of at least 1,400 and a glycol ... | 09/28/1999 |
| 5948875 | Polyurethaneureas and spandex made therefrom New polyurethaneurea polymers and spandex made therefrom, based on certain glycols, MDI and a diamine chain extender mixture containing high proportions of 2-methyl-1,5-pentanediamine and prepared at selected capping ratios, are provided.... | 09/07/1999 |
| 5879596 | Low temperature process for making polyurethaneureas A process for making polyurethaneureas using cryogenic mixing is provided. Such polyurethaneureas are useful for making spandex and, ultimately, various types of clothing. The process involves cooling an isocyanate prepolymer or the like to a temperature ... | 03/09/1999 |
| 5843357 | Spandex elastomers Spandex-type segmented polyurethane/urea elastomers having exceptional elongation, hysteresis, recovery, and other physical properties are prepared by the amine chain extension of an isocyanate-terminated prepolymer prepared by the reaction of a stoichiom... | 12/01/1998 |
| 5723563 | Spandex elastomers Spandex-type polyurethane/urea segmented elastomers with exceptional physical properties may be prepared by the aliphatic and/or cycloaliphatic diamine chain extension of a solution of isocyanate-terminated polyoxypropylene diol-derived prepolymer wherein... | 03/03/1998 |
| 5708118 | Spandex elastomers Spandex-type segmented polyurethane/urea elastomers having exceptional elongation, hysteresis, recovery, and other physical properties are prepared by the amine chain extension of an isocyanate-terminated prepolymer prepared by the reaction of a stoichiom... | 01/13/1998 |
| 5691441 | Spandex elastomers Substitution of from 5 to 50 equivalent percent of an ultra-low unsaturation polyoxypropylene diol for PTMEG in isocyanate-terminated prepolymers used in spandex production is found to lower considerably both prepolymer viscosity and hysteresis while subs... | 11/25/1997 |
| 5644015 | Process of manufacturing improved polyurethane fiber polymer The present invention relates to a process of producing a polymer suitable for manufacturing spandex filament having remarkable elastic recovery rate and heat-setting efficiency wherein the process comprises: stirring a mixture of a glycol and a diisocyan... | 07/01/1997 |
| 5616675 | Process of preparing elastomeric thread A continuous solventless process for preparing elastomeric polyurethane/urea filaments and fibers in a vertical spinning tower and product prepared therefrom.... | 04/01/1997 |
