Patent ID: 8334356
Filing Date: 2012-12-18
Classification: C08G,C08K,C08L

Abstract:
1. A segmented copolymer composition comprising: one or more α,ω (alpha, omega) amine or α,ω (alpha, omega) hydroxyl terminated polysiloxane first soft segments having an average molecular weight of between about 2500 grams per mole to about 10,000 grams per mole; one or more second soft segments selected from the group consisting of perfluoropolyether, α,ω (alpha, omega) dihydroxy terminated fluoroether, α,ω (alpha, omega) hydroxyl terminated poly(perfluoromethylisopropyl ether), polythiodifluoromethylene, polybutadiene, polydioxypropylphosphazene, polydioxyethylphosphazene, polydioxymethylphosphazene, polyisoprene and polyisobutylene; one or more diisocyanate species; and, one or more diamine chain extenders selected from the group consisting of 1,2-diaminocyclohexane (DAC), 1,3-diaminocyclohexane, 1,4-diaminocyclohexane, diethyltoluenediamine (DETDA), and a mixture of two or more thereof, wherein the composition has a high flexibility at an environmental temperature of down to about −100 degrees Celsius, and further has a percent elongation of greater than about 250%, a high tensile strength of greater than about 25 MPa (megapascals), and a single low glass transition temperature (Tg) in a range of from about −60 degrees Celsius to about −110 degrees Celsius.