Preparation method of 3-isocyanate propyltriethoxysilane

A technology of ester propyl triethoxy silane and chloropropyl triethoxy silane is applied in the field of fine chemical synthesis, can solve the problems of large operating coefficient, unsafe, low yield and the like, and achieves simple process, Simple equipment and simple operation
CN110437273AActive Publication Date: 2019-11-12ZHEJIANG HUANGMA TECH +3
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG HUANGMA TECH
Publication Date
2019-11-12

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Abstract

The invention relates to a preparation method of 3-isocyanate propyltriethoxysilane, belonging to the field of fine chemical synthesis. The method comprises synthesizing the 3-isocyanate propyltriethoxysilane from chloropropyltriethoxysilane and potassium cyanate through one-step synthesis in an ionic liquid adopted as a solvent under a catalysis function. An isocyanate process is adopted, and aiming at disadvantages, of the process, that reaction raw materials are difficult to dissolve and yields are low, the preparation method of the 3-isocyanate propyltriethoxysilane based on the ionic liquid is provided.
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Description

technical field

[0001] The invention relates to a preparation method of 3-isocyanatopropyl triethoxysilane, which belongs to the field of fine chemical synthesis. Background technique

[0002] 3-Isocyanatopropyltriethoxysilane is a silane coupling agent containing isocyanate-based active groups, and its function is to promote the bonding performance between inorganic materials and organic materials. It is widely used in high-grade polyurethane sealants and modified polyurethane resins, and can also be used as a tackifier for room temperature vulcanized silicone rubber and a component of varnish resins.

[0003] Common preparation methods of isocyanatosilane mainly include the following:

[0004] Phosgene method:

[0005] Patent CN104203910 describes the preparation of isocyanate compounds by reacting phosgene and amine in an inert solvent. The disadvantage of this method is that phosgene is a colorless, odorless and highly toxic gas. During the production process, phosgene...

Claims

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