High-adhesion silane-modified polyether sealant for prefabricated building and preparation method of sealant

Abstract

The invention discloses a high-adhesion silane-modified polyether sealant for a prefabricated building and a preparation method of the sealant. The method comprises the following steps: adding nano calcium carbonate, heavy calcium carbonate and amino-terminated polyether into a reaction kettle, blending for 1-2 hours in a vacuum condition, then adding a silane-modified polyether polymer, a coupling agent I, a thixotropic agent, an antiaging agent and a water-removing agent, and blending for 0.5-1 hour in the vacuum condition to obtain an ingredient A; adding epoxy resin, a flexible diluent, a coupling agent II and a catalyst into the reaction kettle, and blending for 1-2 hours in the vacuum condition to obtain a modified polyether sealant ingredient B for a base coat-free prefabricated building; and the ingredient A and the ingredient B are mixed in proportion to obtain the sealant.

Description

technical field

[0001] The invention relates to a high-adhesion silane-modified polyether sealant for prefabricated buildings and a preparation method thereof, and belongs to the field of prefabricated building sealants. Background technique

[0002] With the country's strong support for prefabricated buildings, prefabricated buildings have shown a rapid development trend in recent years. As a key supporting material for prefabricated buildings, prefabricated building sealants have attracted more and more attention and attention. The prefabricated building is a building assembled on the site with prefabricated components. There are joints between the prefabricated components, which need to be sealed with sealant. From the 1950s to the 1980s, prefabricated buildings were all the rage in our country; but after the 1980s, they almost disappeared. One of the reasons is that the structural strength of prefabricated buildings at that time could not be guaranteed; the other was t...

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