Abstract: A polyurea/urethane material and method for making it provides for improved optical parts. The material allows for ease of manufacture of parts having good optical properties, high hardness, low density, and good impact resistance. The method provides for related manufacturing advantages.

Abstract: A polyurea/urethane material and method for making it provides for improved optical parts. The material allows for ease of manufacture of parts having good optical properties, high hardness, low density, and good impact resistance. The method provides for related manufacturing advantages.

Abstract: The present invention is an optically clear, high hardness, impact resistant polyurethane comprising the reaction product of: (a) a polyurethane prepolymer prepared by reaction of an aliphatic or cylcoaliphatic diisocyanate with (i) at least one OH-containing intermediate having a molecular weight of 400 to 2000 selected from polyester glycols, polycaprolactone glycols, polyether glycols, polycarbonate glycols, and mixtures thereof, and (ii) a triol, in an equivalent ratio of 2.5 to 4.0 NCO/1.0 OH; and (b) at least one aromatic diamine curing agent selected from 2,4-diamino-3,5-diethyl-toluene, 2,6-diamino-3,5-diethyl-toluene, and mixtures thereof in an equivalent ratio of about 0.85 to 1.02 NH2/1.0 NCO. The polyurethane provides exceptionally high heat distortion temperatures and excellent chemical resistance.

Abstract: An extrudable urea-extended thermoplastic polyurethane elastomer is formed from at least one aliphatic diisocyanate, at least one polyester glycol or polyether glycol, and at least one diamine curing agent. At least one second diamine curing agent and/or at least one extrusion processing aid may be included. The polyurethane has high-temperature-resistance and is thus extrudable at high temperatures. The polyurethane is also strong and durable. The polyurethane can be liquid-cast, transfer-molded, sprayed, and extruded without changing either the chemistry or stoichiometry of the polyurethane. The polyurethane may be used for making vehicle air bags or other any application for thermoplastic urethanes which requires increased thermal stability.

Abstract: The present invention is an optically clear, high hardness, impact resistant polyurethane which provides exceptionally high heat distortion temperatures and excellent chemical resistance. The invention is particularly useful for transparency applications that require excellent impact resistance coupled with high heat distortion temperatures, such as architectural glazings vehicles, glazings, riot shields, aircraft canopies, face masks, visors, opthalmic and sun lenses, protective eyewear, and transparent armor.

Abstract: The present invention is an optically clear impact resistant polyurethane which provides exceptionally high heat distortion temperatures and excellent chemical resistance. The invention is particularly useful for transparency applications that require excellent impact resistance coupled with high heat distortion temperatures, such as glazings for buildings, vehicles, riot shields, aircraft canopies, and face masks.

Abstract: An extrudable urea-extended thermoplastic polyurethane elastomer is formed from at least one aliphatic diisocyanate, at least one polyester glycol or polyether glycol, and at least one diamine curing agent. At least one second diamine curing agent and/or at least one extrusion processing aid may be included. The polyurethane has high-temperature-resistance and is thus extrudable at high temperatures. The polyurethane is also strong and durable. The polyurethane can be liquid-cast, injection-molded, transfer-molded, sprayed, and extruded without changing either the chemistry or stoichiometry of the polyurethane. The polyurethane may be used for making vehicle air bags or other any application for thermoplastic urethanes which requires increased thermal stability.

Abstract: A transparent polyurethane has exceptionally high heat distortion temperatures, that is at least 280.degree. F. at 264 psi, as well as good light transmission, ultraviolet light resistance, abrasion resistance, and the like. The urethane intermediate is one or more very low equivalent weight, multifunctional hydroxy containing compounds so that when reacted with a polyisocyanate and cured with a low equivalent weight, multifunctional polyol, a highly crosslinked polyurethane is produced.

Abstract: A process for making an elastomer for use in printing/drive belts is disclosed wherein a mixture of approximately 2 equivalents of toluene diisocyanate consisting of about 88 wt. % of the 2,4 isomer and 12 wt. % of the 2,6 isomer is reacted with a polyether or polyester having difunctional primary hydroxyl groups to form a prepolymer. The prepolymer is then reacted with a diamine curing agent to form the elastomer.

Abstract: A polyurethane, being the reaction product of a polyester or polyether polyol with 1.5 to 2.5 equivalents of polyisocyanate, 0.05 to 0.40 equivalents of water cured with a polyol having less than 800 molecular weight.