Silane-terminated resin for sealant and preparation method thereof

A silane-terminated and sealant technology, used in adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of complex preparation technology of silane-terminated resin, expensive raw materials, and high product dynamic viscosity. The effect of shortening the raw material supply chain, simple and environmentally friendly preparation process, and low dynamic viscosity

Active Publication Date: 2020-07-10
ZHEJIANG HUANGMA TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] In view of the above technical problems, in order to solve the existing problems of complex preparation technology of silane-terminated resins, expensive raw materials, and high dynamic viscosity of products, the present invention provides a silane-terminated resin for sealant and its preparation method. The preparation process obtains the silane-terminated resin with low dynamic viscosity, and the specific scheme is as follows:

Method used

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  • Silane-terminated resin for sealant and preparation method thereof
  • Silane-terminated resin for sealant and preparation method thereof
  • Silane-terminated resin for sealant and preparation method thereof

Examples

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Effect test

Embodiment 1

[0059] A kind of silane-terminated resin for sealant, its preparation method comprises the following steps:

[0060] S1: Add 1 part of hydroxymethyltriethoxysilane and 80ppm double metal cyanide (DMC) catalyst to the 2.5L high-pressure glass reactor in sequence, completely replace the air in the high-pressure glass reactor with nitrogen, and raise the temperature to 150 while stirring. ℃, first add 0.5 parts of propylene oxide to initiate the reaction, when the temperature rise rate in the reactor exceeds 0.1 °C / s and the pressure begins to drop, start to continuously add the remaining 34.5 parts of propylene oxide, and after the addition is completed, keep it at 150 ° C for 2 hour, the pressure was constant at this time, and vacuum degassed for 20 minutes to obtain a monosiloxane-based polyether intermediate;

[0061] S2: Lower the temperature in the high-pressure glass reactor to 80°C, then transfer all the monosiloxane-based polyether intermediates prepared in S1 into the n...

Embodiment 2

[0066] A kind of silane-terminated resin for sealant, its preparation method comprises the following steps:

[0067] S1: Add 1 part of hydroxymethyltriethoxysilane and 80ppm double metal cyanide (DMC) catalyst to a 2.5L high-pressure glass reactor in sequence, completely replace the air in the high-pressure glass reactor with nitrogen, stir and heat up to 150°C , add 0.5 parts of propylene oxide to initiate the reaction. When the temperature rise rate in the reactor exceeds 0.1°C / s and the pressure begins to drop, start to continuously add the remaining 34.5 parts of propylene oxide. At this time, the pressure was constant, and vacuum degassed for 20 minutes to obtain a monosiloxane-based polyether intermediate;

[0068] S2: Lower the temperature in the high-pressure glass reactor to 90°C, transfer all the monosiloxane-based polyether intermediates prepared in S1 into the normal-pressure reactor, and add 200ppm stannous octoate-triethylenediamine Composite catalyst, heat up w...

Embodiment 3

[0074] A kind of silane-terminated resin for sealant, its preparation method comprises the following steps:

[0075] S1: Add 1 part of hydroxymethyltriethoxysilane and 80ppm double metal cyanide (DMC) catalyst to a 2.5L high-pressure glass reactor in sequence, completely replace the air in the high-pressure glass reactor with nitrogen, stir and heat up to 150°C, First add 0.5 parts of propylene oxide to initiate the reaction. When the temperature rise rate in the reactor exceeds 0.1°C / s and the pressure begins to drop, start to add the remaining propylene oxide continuously. Keep the pressure constant, vacuumize and degas for 20 minutes to obtain a monosiloxane-based polyether intermediate;

[0076] S2: Lower the temperature in the high-temperature glass reactor to 90°C, then transfer all the monosiloxane-based polyether intermediates prepared in S1 into the normal-pressure reactor, and add 200ppm stannous octoate-triethylene di Amine composite catalyst (mass ratio of stannou...

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Abstract

The invention provides a silane-terminated resin for a sealant. The structural formula of the silane-terminated resin is shown as the specification, wherein R is straight-chain or branched-chain C1-C10 alkyl; R0 is straight-chain or branched-chain C1-C10 alkyl or branched-chain C1-C10 alkoxy; R1 is straight-chain or branched-chain C1-C10 alkyl; and R2 is a diisocyanate group. The invention also discloses a preparation method of the resin, and the method comprises the following steps: using hydroxyl alkoxy silane as the raw material, adding a first catalyst, carrying out nitrogen placement, then performing heating, introducing an epoxy compound to carry out pre-reaction, initiating the reaction, then continuously introducing an epoxy compound for reaction, thereby obtaining a monosiloxane group terminated polyether intermediate; adding a second catalyst and diisocyanate into the intermediate, and performing heat preservation to further carry out reaction, thus obtaining the silane-terminated resin for a sealant. According to the method, the reaction path is shortened, so that side reactions are reduced, the utilization rate of raw materials is increased, three wastes are not generated in the preparation process, the preparation process is simple and environment-friendly, and the prepared resin is low in dynamic viscosity.

Description

technical field [0001] The invention relates to the technical field related to polymers, in particular to a silane-terminated resin for sealants and a preparation method thereof. Background technique [0002] Silane-terminated resin has the flexibility and low temperature resistance of polyether, and the silane-terminated group has good moisture curing and adhesion properties. It is the main raw material of adhesives and sealants. In recent years, research on silane-terminated polyethers has progressed rapidly. Due to its excellent bonding properties and processing properties, it is widely used in the fields of super high-rise buildings, rail transit, and traceless assembly. [0003] The focus of research on silane-terminated resins is the silane modification technology. It was first proposed in the 1970s and 1980s by Kaneka Corporation of Japan to use polypropylene oxide as the main chain and use dimethoxysilane to carry out end-capping to prepare silane. The method of end...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/28C08G65/28C09J175/08
CPCC08G18/7614C08G18/755C08G18/73C08G18/7678C08G18/289C08G65/2639C09J175/08
Inventor 董楠王伟松金一丰秦鹏飞裘碧菡
Owner ZHEJIANG HUANGMA TECH
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