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 (CzH2z+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.
线性
硅酮-聚
氨酯共聚物,其聚合物骨架上含有通式为
[R′NR˝SiMe₂(OSiMe₂)bOSiMe₂R˝NR′CONHR˝NHCO₂(Y)O₂CNHR˝NHCO]。
其中 Me 代表甲基;R′ 代表氢原子或具有一至三个碳原子的低级烷基;R˝ 代表至少具有三个碳原子的二价烃基,如 (CH₂)₃₋₁₂;和 Y 代表 (CzH2z+1N),其中 Z ≧ 5 和 ≦ 22,并可通过使用季
铵化剂 R′X 季
铵化,其中 X 选自卤原子、
醋酸酯或高
羧酸酯基团和烷基
硫酸酯基团组成的组,其中烷基具有 1 至 12 个碳原子,R′、R˝ 和 b 可在每种共聚物中变化。这些共聚物可以从有机溶剂或
水性分散体中浇铸,从而提供具有高透明度、出乎意料的高强度和高弹性的薄膜。