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METHOD FOR POLYMERIZING CYCLIC DIORGANOSILOXANOLIGOMERS AT SUPRAATMOSPHAERIC PRESSURE IN A FLUIDUM THAT GASES AT NORMAL TEMPERATURE.
METHOD FOR POLYMERIZING CYCLIC DIORGANOSILOXANOLIGOMERS AT SUPRAATMOSPHAERIC PRESSURE IN A FLUIDUM THAT GASES AT NORMAL TEMPERATURE.
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机译:在正常温度下产生的氟化物上方大气压力下聚合环二有机硅氧杂低聚物的方法。
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摘要
1. Process for acid- or base-catalysed polymerization of polydiorganosiloxane oligomers with a view to obtaining a polydiorganosiloxane of high molecular mass, characterized in that the polymerization is carried out in at least one fluid under supraatmospheric pressure, which is a gas under normal conditions of temperature and of pressure, the physical state of the said fluid being during the polymerization chosen from the state of a gas under supraatmospheric pressure, the liquid state and the supercritical state and in that the polydiorganosiloxane of high molecular mass is recovered by expansion of the said fluid.
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