Silicone-urethane copolymers

Details Silicone-urethane copolymers Silicone-urethane copolymers

C - Chemistry, Metallurgy

08

G

402/21

C08G 71/04 (2006.01) C08G 18/08 (2006.01) C08G 18/61 (2006.01) C08G 18/80 (2006.01) C08G 77/388 (2006.01) C08G 77/458 (2006.01) C08G 77/54 (2006.01)

Patent

CA 2020024

- 21 - ABSTRACT Linear silicone-urethane copolymers which contain tertiary amine or quaternary ammonium groups on the polymer backbone of the general formula: [R'NR"SiMe2(OSiMe2)bOSiMe2R"NR'CONHR"NHCO2(Y)O2CNHR"NHCO] wherein Me represents a methyl group; R' represents a hydrogen atom or a lower alkyl group having one to three carbon atoms; R" represents a divalent hydrocarbon group having at least three carbon atoms such as (CH2)3-12; and Y represents (C2H2z+1N) where Z ? 5 and ? 22 and may be quaternized by use of a quaternizing agent R'X wherein X is selected from the group consisting of a halide atom, an acetate or higher carboxylate group, and an alkylsulfate group where the alkyl moiety has 1 to 12 carbon atoms and where R', R" and b may vary within each copolymer are described. These copolymers may be cast from organic solvents or from aqueous dispersions, providing films which possess high degrees of clarity and unexpectedly high strength and elasticity. 15w.mis/bks D-15,934

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