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Catalyst Free Silicone Sealants That Cure Underwater
Author(s) -
Bui Robert,
Brook Michael A.
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202000737
Subject(s) - silicone , materials science , adhesive , glyoxal , composite material , aqueous solution , glutaraldehyde , formaldehyde , catalysis , elastomer , silicone resin , silicone elastomers , aqueous medium , polymer , polymer science , organic chemistry , coating , chemistry , layer (electronics)
Silicone sealants and adhesives are widely used to prevent the ingress of water. However, silicones must normally be cured in air, as excess water inhibits or prevents cure from occurring. It is reported that aqueous solutions of the aliphatic aldehydes glutaraldehyde, glyoxal or, particularly, formaldehyde rapidly react without catalysts with a variety of aminopropyl‐modified silicone polymers to give silicone elastomers, even underwater. These products, whose properties are readily tailored by controlling the density of amino groups in the starting materials, may be 3D printed, or used both as adhesives and sealants in air or water.