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    • 33. 发明授权
    • Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole
    • 全氟-2,2-二甲基-1,3-二氧杂环戊烯的无定形共聚物
    • US4977026A
    • 1990-12-11
    • US501116
    • 1990-03-29
    • Edward N. Squire
    • Edward N. Squire
    • C08F234/02H05K1/03H05K3/28
    • C08F234/02H05K1/034H05K3/285Y10T428/31544Y10T428/31699
    • Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole with at least one fluoro comonomer selected from one or more of ten defined classes having a recited minimum mole proportion of perfluoro-2,2-dimethyl-1,3-dioxole, in no event less than 65%, have high glass transition temperatures of 140.degree. C. or higher, low indices of refraction, and good physical properties, and low dielectric constants, which make them suitable for cladding optical fibers as well as for many electronics applications, including the manufacture of substrates for circuit boards. They all are soluble at room temperature in perfluoro(2-butyltetrahydrofuran), which makes it practical to apply them as coatings from solution.
    • 全氟-2,2-二甲基-1,3-二氧杂环戊烯与至少一种氟共聚单体的无定形共聚物,其选自一个或多个十个界定的类别,其具有所列的最大摩尔比例的全氟-2,2-二甲基-1,3-二氧杂环戊烯, 二氧杂环戊烯在任何情况下不低于65%,玻璃化转变温度高于140℃或更高,折射率低,物理性能好,介电常数低,使其适用于包覆光纤以及 许多电子应用,包括制造电路板的基板。 它们都在室温下溶于全氟(2-丁基四氢呋喃),使其适用于溶液涂料。