15396-00-6Relevant articles and documents
PREPARATION OF ISOCYANATOSILANES
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Paragraph 0051-0052, (2020/02/06)
There is provided herein a method and an apparatus for producing an isocyanatoorganosilane which method includes feeding a carbamatoorganosilane to a cracking device where it is thermally dissociated into a reaction product mixture comprising isocyanatoorganosilane, alcohol, and heavies, followed by separating the mixture in a distillation column of two parts and collecting the isocyanatoorganosilane from the distillation column via a side stream having a predetermined location between the top and bottom parts of the column; and wherein the distillation column is configured to have a ratio of the length of the bottom part of the distillation column to the length of the top part of the distillation column which is effective to provide a side stream having a high purity and high weight percent of isocyanatoorganosilane.
Method for preparing 3-isocyanatopropyltrimethoxysilane
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Paragraph 0032-0039, (2019/02/06)
The invention relates to a method for preparing 3-isocyanatopropyltrimethoxysilane. The method is characterized in that [3-(trimethoxysilane)propyl]methyl carbamate is used as a raw material to reactwith methyl trichlorosilane, and thus 3-isocyanatopropyltrimethoxysilane is synthesized by one step. The preparation method provided by the invention is simple, the production process is safe, the reaction temperature is easy to control, production equipment is simple, and thus the method is suitable for industrial production.
PROCESS FOR PREPARING ISOCYANATES CONTAINING ALKOXYSILANE GROUPS
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Paragraph 0068-0071, (2019/10/17)
The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) haloalkylalkoxysilane is reacted with metal cyanate and alcohol to give alkoxysilanoalkylurethane, B) alkoxysilanoalkylurethane is freed of low boilers, solids, salt burdens and/or high boilers and optionally purified, C) alkoxysilanoalkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from cleavage bottoms material and collected, wherein the process regime at least of steps C) to D) is continuous.