High-strength high-hardness epoxy modified MS sealant and preparation method thereof

A MS sealant and epoxy modification technology, applied in chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of poor weather resistance of sealants, high equipment requirements, and easy adsorption of dust, etc., to increase water resistance properties, high cross-linking density, and increased bulk strength

Active Publication Date: 2020-10-02
SUZHOU DIMA BIO TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the synthesis route of Zhongyuan in Japan has high requirements on equipment and complicated process, and the surface of the prepared medium and low modulus polymers is sticky after being made into sealant, which is easy to absorb dust; while the other two synthesis routes are due to different The introduction of cyanate groups makes the weather resistance of the sealant worse and easy to yellow

Method used

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  • High-strength high-hardness epoxy modified MS sealant and preparation method thereof

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Effect test

Embodiment 1

[0023] A high-strength and high-hardness epoxy-modified MS sealant, firstly prepare a silane-modified polyether polymer, add 495 parts of difunctional polyetheramine with a molecular weight of 1000 into a dry 2L reaction kettle, and seal the reaction kettle , replace the air in the reactor with dry nitrogen for 3 times, start stirring, and slowly raise the temperature to 50-60°C; slowly add 100 parts of 1,4-butanediol diglycidyl ether dropwise for addition reaction, and control the reaction temperature at 50-60°C for 2 hours; then slowly add 128 parts of 3-glycidyloxypropyltrimethoxysilane dropwise, and control the reaction temperature at 70-90°C for 3 hours; slowly add 15 parts of DMP-30 to control the reaction temperature Reaction at 70-90°C for 15 minutes; vacuum degassing for 15 minutes at a pressure of ≥-0.09MPa to obtain a colorless and transparent epoxy resin-blocked silane-modified polyether polymer.

[0024] Add 700 parts of the above-mentioned silane-modified polyeth...

Embodiment 2

[0026] A high-strength and high-hardness epoxy-modified MS sealant. First, prepare a silane-modified polyether polymer. Add 990 parts of difunctional polyetheramine with a molecular weight of 2000 into a dry 2L reactor, and seal the reactor. , replace the air in the reactor with dry nitrogen for 3 times, start stirring, and slowly raise the temperature to 50-60°C; slowly add 100 parts of polypropylene glycol diglycidyl ether dropwise for addition reaction, and control the reaction temperature at 50-60°C, It lasted 2 hours; then slowly added 123 parts of 3-glycidyloxypropyltrimethoxysilane dropwise, and the reaction temperature was controlled at 70-90°C, which lasted 3 hours; slowly added 40 parts of DMP-30 to control the reaction temperature at 70-90°C ; Reaction for 15 minutes; Vacuum degassing for 15 minutes under a pressure of ≥-0.09MPa to obtain a colorless and transparent epoxy resin-blocked silane-modified polyether polymer.

[0027] Add 700 parts of the above-mentioned ...

Embodiment 3

[0029] A high-strength and high-hardness epoxy-modified MS sealant, firstly prepare a silane-modified polyether polymer, add 1500 parts of difunctional polyetheramine with a molecular weight of 3000 into a dry 2L reaction kettle, and seal the reaction kettle , replace the air in the reactor with dry nitrogen for 3 times, start stirring, and slowly raise the temperature to 50-60°C; slowly add 100 parts of ethylene glycol diglycidyl ether dropwise for addition reaction, and control the reaction temperature at 50-60°C , lasted 2h; then slowly added 122 parts of 3-glycidyloxypropyltrimethoxysilane dropwise, the reaction temperature was controlled at 70-90°C, and lasted 3h; slowly added 60 parts of DMP-30 to control the reaction temperature at 70-90 ℃; reaction for 15 minutes; vacuum degassing for 15 minutes under a pressure ≥ -0.09MPa to obtain a colorless and transparent epoxy resin-blocked silane-modified polyether polymer.

[0030]Add 700 parts of the above-mentioned silane-mod...

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Abstract

The invention discloses a high-strength high-hardness epoxy modified MS sealant and a preparation method thereof. The epoxy modified MS sealant is prepared from a silane modified polyether polymer, polyoxypropylene ether glycol, calcium carbonate, silicon dioxide, an ultraviolet absorbent, a light stabilizer, vinyltrimethoxysilane, N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane and dibutyltin dilaurate. The silane modified polyether polymer comprises the following components: difunctional polyetheramine, low molecular weight epoxy resin, epoxy silane and an epoxy accelerator. Accordingto the present invention, the polyether amine and the low molecular weight epoxy resin monomer are subjected to a reaction, and the epoxy silane is adopted to block the end, such that the performanceof the original MS polymer is retained, and the strength, the hardness and the water resistance of the body are improved.

Description

technical field [0001] The invention relates to the technical field of sealant preparation, in particular to a high-strength and high-hardness epoxy-modified MS sealant and a preparation method thereof. Background technique [0002] Silane-modified polyether polymer (MS polymer), also known as silane-terminated polyether polymer, is a polymer with polyether as the main chain and two ends capped with siloxane, with its main resin The prepared high-performance environmental sealant is referred to as MS glue. Because it combines the advantages and strengths of silicone sealant and polyurethane sealant, it exhibits excellent weather resistance, durability, high resistance to deformation and displacement, good adhesion, paintability, environmental friendliness, and low staining. , low viscosity and excellent workability have attracted more and more attention from the domestic construction industry, and in the industrial field, such as automobile manufacturing, rail transit, cont...

Claims

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Application Information

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IPC IPC(8): C09J187/00C09J11/04C09J11/06C08G81/00C09K3/10
CPCC08G81/00C08K2003/265C09J11/04C09J11/06C09J187/005C09K3/10C08L71/02C08K3/26C08K3/36C08K5/5425C08K5/544C08K13/02
Inventor 孙乐栋曹建强
Owner SUZHOU DIMA BIO TECH DEV
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