Two-component silane-modified polyether sealing material and preparation method thereof

Abstract

The invention discloses a bi-component silane modified polyether sealing material and a preparation method thereof. The bi-component silane modified polyether sealing material comprises silane modified polyether, a plasticizer, an incremental filler A, a reinforcing filler, a toner, a thixotropic agent, a light stabilizer, hollow glass microspheres, a cross-linking agent, a coupling agent, an incremental filler B, an organic tin catalyst and a titanium catalyst. According to the bi-component silane modified polyether sealing material, organic tin is partially replaced with the titanium catalyst and is low in content, so that the harm of organic tin can be reduced; the production process is simple, a high temperature dehydration process is omitted, and the cost is low; the external and internal parts of a glue layer are simultaneously cured by virtue of moisture of the glue layer during curing, so that the defects that single-component silane modified polyether sealing glue is cured from outside to inside by virtue of moisture and the dept curing is slow are overcome, and the variation of curing rate along the external environment is small, so that the production efficiency is greatly improved; the bi-component silane modified polyether sealing material has good construction stability and can be widely applied to the fields of buildings, automobiles, locomotives, electric products and the like.

Description

technical field

[0001] The invention relates to the field of polymer materials, in particular to a two-component silane-modified polyether sealing material and a preparation method thereof. Background technique

[0002] Traditional sealants mainly include polysulfide, silicone, polyurethane, epoxy, etc. Polysulfide sealant has disadvantages such as odor, slow curing at low temperature, easy aging and hardening, and poor durability; silicone sealant has excellent aging resistance, but its strength is low and pollution resistance is poor; polyurethane sealant has high strength, but contains Free isocyanate is easy to form bubbles during curing, has poor aging resistance, and often needs to be used with a primer. The epoxy sealant has high strength after curing, but it is very brittle, has a large internal stress, and has poor aging resistance and yellowing resistance.

[0003] With the development of the economy, customers have higher and higher requirements for the performa...

Images