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    • 2. 发明授权
    • Heat-curable silicone compositions having improved bath life
    • 具有改善的浴寿命的可热固化的有机硅组合物
    • US5108791A
    • 1992-04-28
    • US677938
    • 1991-04-01
    • Kyuha ChungAntony P. WrightMing-Hsiung Yeh
    • Kyuha ChungAntony P. WrightMing-Hsiung Yeh
    • C08L83/04C09D183/04
    • C08L83/04C09D183/04
    • A curable organosilicon composition comprises a component having silicon-bonded hydrogen atoms, a component having silicon-bonded radicals reactive therewith, a curing catalyst, a catalyst-inhibitor and a bath life extender. The use of certain compounds, which are ineffective as a bath life extender in the absence of a catalyst inhibitor, effectively extend the room temperature bath life of a silicone coating composition containing a catalyst inhibitor. Being a substantial non-inhibitor for the catalyst the bath life extender component does not effect the cure time and/or cure temperature of the composition.This discovery has permitted the preparation of curable coating compositions which have a long bath life at room temperature and a rapid cure time at elevated temperatures which does not drift to longer intervals as the coating compositions ages over a typical production run.The room temperature cure times of the organopolysiloxane coating compositions of this invention are adequately long, and their cure times at elevated temperature are advantageously brief, that they are useful in fast-paced coating operations, such as adhesive release coating operations wherein the cured coating is further coated with an adhesive in-line, i.e., immediately after being cured.
    • 可固化的有机硅组合物包含具有与硅键合的氢原子的组分,具有与其反应的硅键合基团的组分,固化催化剂,催化剂抑制剂和浴寿命延长剂。 在不存在催化剂抑制剂的情况下,使用无效作为浴寿命延长剂的某些化合物有效地延长了含有催化剂抑制剂的硅氧烷涂料组合物的室温浴寿命。 作为催化剂的实质性非抑制剂,浴寿命延长剂组分不影响组合物的固化时间和/或固化温度。 该发现允许制备在室温下具有长浴槽寿命和在高温下快速固化时间的可固化涂料组合物,其在涂料组合物比典型的生产流程老化时不会漂移到更长的间隔。 本发明的有机聚硅氧烷涂料组合物的室温固化时间足够长,并且它们在升高的温度下的固化时间有利地是短暂的,它们可用于快速进行的涂布操作,例如粘合剂剥离涂覆操作,其中固化涂层为 进一步用粘合剂在线涂布,即在固化后立即进行。