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Silicomethane coupling agent containing cyanide and secondary amino and its preparation process and application thereof

A technology of silane coupling agent and secondary amino group, which is applied in the field of silane coupling agent containing cyano group and secondary amino group and its preparation and application, and can solve the problems of strong amine smell, strong alkalinity, and yellowing of the product

Inactive Publication Date: 2006-06-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amino silane coupling agents have been widely used in epoxy, phenolic, melamine, furan, silicone and other composite materials and adhesives, but primary ammonia silane coupling agents have a strong amine smell and alkaline Strong, easy to make the product turn yellow and other shortcomings, it needs to be further improved in improving the mechanical properties of the composite material and its adhesion to the substrate

Method used

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  • Silicomethane coupling agent containing cyanide and secondary amino and its preparation process and application thereof
  • Silicomethane coupling agent containing cyanide and secondary amino and its preparation process and application thereof
  • Silicomethane coupling agent containing cyanide and secondary amino and its preparation process and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1, 1.5, 2 moles of acrylonitrile were added to 1 mole of (MeO) 3 SiC 3 h 6 NHC 2 h 4 NH 2 (commercial brand is KH-792) in carrying out addition reaction, reaction formula is as follows:

[0012]

[0013] The name of the product is 7A for short, and the excess acrylonitrile will continue to react with the product to generate a small amount of dicyano substitute

[0014]

[0015] Product properties are shown in Table 1.

[0016] Acrylonitrile to KH-792 Ratio

Embodiment 2

[0018] Prepare another silane coupling agent containing cyano and secondary amino groups in the same way, referred to as 6A, the difference is that 1, 1.5, 2 moles of acrylonitrile are added to 1 mole of (MeO) 3 CH 3 SiC 3 h 6 NHC 2 h 4 NH 2 (trade name is DL-602) in addition reaction, generate

[0019]

[0020] Excess acrylonitrile will also continue to react with the above-mentioned products to generate a small amount of dicyano substituents

[0021]

[0022] Its product performance is as shown in table 2

[0023] Acrylonitrile to DL-602 Ratio

[0024] As can be seen from Tables 1 and 2, the ratio of acrylonitrile and aminosilane is the key of the present invention. If the amount of acrylonitrile is too low, the reaction is not complete, the content of cyano group introduced on the aminosilane is low, and the polarity change is not obvious; if the amount of acrylonitrile is too high, it will continue to add hydrogen to the secondary ammonia on the amin...

Embodiment 3

[0026] Low-modulus, high-elongation silicone sealing materials are mainly composed of hydroxyl-terminated polyorganosiloxane, fillers, chain extenders, cross-linking curing agents, catalysts and plasticizers. Add an appropriate amount of silane to the system The coupling agent can not only effectively improve the mechanical properties of the silicone sealing material, greatly shorten its surface drying time, but also significantly improve its bonding strength to the substrate.

[0027] Mix 100 parts of hydroxyl-terminated polydimethylsiloxane, 100 parts of light calcium carbonate, 6 parts of chain extender, 5 parts of crosslinking curing agent and 0.1 part of catalyst, and stir evenly under vacuum, and add 1 part of silane coupling agent 7A at the same time , after the bubbles and some low-molecular substances generated in the reaction are removed, the silicone sealing material is prepared and sealed for preservation.

[0028] The other four silicone sealing materials were pre...

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PUM

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Abstract

The invention discloses a method to make silane coupler that contains cyan and secondary amino group. The molecular structure is (R1O)3-xSiR2xR3NHR4NHy(C2H4CN)z that is made up from the reaction of 1-2mol acrylonitrile and 1mol amino silane that has the molecular of (R1O)3-xSiR2xR3NHR4NH2. Comparing to traditional amino silane coupler, it has good restoring stability could be make into other coupler. The mechanical property and strength of bond to the base material would be greatly improved.

Description

technical field [0001] The present invention relates to a silane coupling agent containing cyano group and secondary amino group and its preparation method and application Background technique [0002] Silane coupling agent is a kind of low-molecular-weight organosilicon compound with special structure. It also has reactive groups that can combine with inorganic materials and organic materials. The materials are coupled together, increasing the bond strength of the interfacial layer. Therefore, the mechanical properties and hydrolysis resistance of composite materials can be improved by pretreating fillers and glass fibers with silane coupling agents or directly doping silane coupling agents into resins, fillers, and fibers, or directly silane coupling The agent is added to the adhesive or used as a primer to improve the bonding strength of the adhesive to the substrate. Work in this area has been reported as early as the 1950s. Amino silane coupling agents have been wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/541C08L61/06C08L63/00C09J161/06C09J163/00
Inventor 郑强徐晓明林薇薇高传花
Owner ZHEJIANG UNIV
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