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Synthesis method and application of silane-terminated polyether

A technology of silane-terminated polyether and synthesis method, which is applied in the direction of polyether adhesives, adhesive types, adhesives, etc., can solve the problems of high reactivity, easy gelation, complicated procedures, etc., and achieve mild reaction conditions , surface drying time is moderate, and the synthesis steps are simple

Pending Publication Date: 2022-02-08
江西晨光新材料股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The isocyanate method is catalyzed by polyol polyether, isocyanate silane, and organotin. It needs to introduce a catalyst, and the isocyanate silane has high reactivity, high toxicity, and high cost
The epoxy ring-opening method mostly uses the ring-opening reaction of primary and secondary amino compounds and epoxy to link the epoxy-terminated polyether with the epoxy-silane-containing compound. It is necessary to prepare the epoxy-terminated polyether first, but the process slightly complicated
There are also studies using low molecular weight polyetheramine and aminosilane to prepare silane-modified polyether through Michael reaction. This silane-modified polyether has a short molecular chain and has 12 reactive Si-OCHs at the chain end. 3 , high reactivity, there are problems such as gelation in the production process when actually preparing MS glue, these problems limit its application in the market

Method used

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  • Synthesis method and application of silane-terminated polyether

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Embodiment 1

[0022] This embodiment provides a kind of silane-terminated polyether, and its synthetic method comprises the following steps:

[0023] Under the protection of nitrogen, add 5.3g methyl methacrylate, 100g molecular weight 4000PPG, 0.043g 2,5-di-tert-butylhydroquinone into the three-necked flask, react at 80°C to slight reflux, and collect by-product methanol by distillation , continue to heat up the unreacted methyl methacrylate, and continue to heat up until there is basically no distillate to obtain an unsaturated double bond modified polyether, and then add 10.1g of aminopropyltrimethoxysilane to it, at 120-125 ° C React for 3 hours, lower the temperature of the oil pump to -0.8MPa, and remove unreacted aminopropyltrimethoxysilane in a vacuum to obtain a colorless to pale yellow transparent silane-terminated polyether.

Embodiment 2

[0025] This embodiment provides a kind of silane-terminated polyether, and its synthetic method comprises the following steps:

[0026] Under the protection of nitrogen, add 6.3g methyl methacrylate, 100g molecular weight 4000PPG, 0.006g 2,5-di-tert-butylhydroquinone into a three-necked flask, heat at 85°C until a slight reflux occurs, and distill to collect by-product methanol , slowly raising the temperature to 110°C to distill and recover the unreacted methyl methacrylate, and continuously raising the temperature until there is basically no distillate to obtain an unsaturated double bond modified polyether, and then adding 11.7g of aminopropyltrimethoxysilane to it, React at 125-130°C for 6 hours, lower the temperature of the oil pump to -0.8MPa, and remove unreacted aminopropyltrimethoxysilane in a vacuum to obtain a light yellow transparent silane-terminated polyether.

Embodiment 3

[0028] This embodiment provides a kind of silane-terminated polyether, and its synthetic method comprises the following steps:

[0029] Under nitrogen protection, add 7.0g methyl methacrylate, 100g molecular weight 4000PPG, 0.004g 2,5-di-tert-butylhydroquinone into a three-necked flask, heat at 90°C until a slight reflux occurs, and distill to collect the by-product methanol , slowly raising the temperature to 120°C to distill and recover the unreacted methyl methacrylate, and continuously raising the temperature until there is basically no distillate to obtain an unsaturated double bond modified polyether, and then add 13.5g of aminopropyltrimethoxysilane to it, React at 130-135°C for 8 hours, lower the temperature of the oil pump to -0.8MPa, and remove unreacted aminopropyltrimethoxysilane in a vacuum to obtain a light yellow transparent silane-terminated polyether.

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Abstract

The invention provides a synthesis method and application of silane-terminated polyether. The synthesis method of the alkane-terminated polyether comprises the following steps: heating polyether and acrylate in the presence of a polymerization inhibitor to carry out dealcoholization reaction, adding an amino silane coupling agent, reacting at 100-150 DEG C for 2-10 hours, and cooling and removing impurities to obtain the alkane-terminated polyether. The silane-terminated polyether obtained by the synthesis method provided by the invention can be used as a base adhesive for preparing a silane-modified polyether sealant, the used raw materials are cheap and easy to obtain, the reaction activity of the synthesized silane-terminated polyether is moderate, and corresponding formula adjustment of downstream MS adhesive manufacturers according to performance requirements is facilitated. The synthesis steps are simple, the reaction conditions are mild, and the method is suitable for polyethers with all molecular weights.

Description

technical field [0001] The invention relates to the technical field of sealant synthesis, more specifically, to a synthesis method and application of a silane-terminated polyether. Background technique [0002] Silane-modified polyether sealant is a new type of sealant developed in recent years to replace silicone glue and polyurethane sealant. It combines the advantages of silicone glue and polyurethane glue, and is widely used in construction, home decoration and other industries. Silane-modified polyether sealant, also known as silane-terminated polyether sealant, is based on alkoxysilane-modified silanized polyether, mainly terminal silyl-based polyether (MS), and can be hydrosilylated method, addition method, isocyanate method, and epoxy ring-opening method. Among them, the preparation process of hydrosilicon addition method is simple, and the end-capping rate is acceptable, but the allyl polyether capped with chloropropene and the like has more color , is not friendly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/336C08G65/332C09J171/02
CPCC08G65/336C08G65/3322C09J171/02C08G2170/00C08G2190/00
Inventor 丁冰梁秋鸿杨静葛利伟周俊姜林炜
Owner 江西晨光新材料股份有限公司
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