Silane-modified polyether superhydrophilic polymers achieve the synergy of superhydrophilicity and structural stability through the covalent integration of siloxane and polyether segments. This represents a significant breakthrough in the field of advanced functional materials. The core of its preparation lies in precisely controlling the silane grafting method and the structure of the polyether segments. The mainstream processes include end-silaneation and side-linking. 
During the preparation process, first, ethylene oxide and propylene oxide are subjected to anionic ring-opening polymerization to generate hydroxyl-terminated polyethers. Then, silane groups are introduced through isocyanate silaneation or epoxy silane ring-opening methods. The reaction is carried out in an anhydrous environment with dibutyltin dilaurate as a catalyst at 60-80°C for grafting. The key to superhydrophilicity is to optimize the composition of the polyether segments, increasing the proportion of ethoxy (EO) chain segments, and achieving block copolymerization of siloxane and polyether chains through silanol addition reactions, reducing the surface tension to 20.5-21 dynes. Adding 0.1% can enable superwetting spread on hydrophobic substrates. 
This polymer exhibits excellent properties: a solid content exceeding 98%, VOC lower than 50g/L, with outstanding environmental friendliness; tensile strength up to 2.2MPa, elongation at break over 560%, elastic recovery rate ≥ 85%; maintaining stable hydrophilicity within a wide temperature range of -40°C to 90°C, with performance attenuation of less than 10% after QUV aging tests. Its superhydrophilic property stems from the formation of a dynamic hydration layer by the polyether segments, combined with the firm adhesion of the silane groups to the substrate, allowing compatibility with various materials without the need for a primer. This material has been widely applied in waterproof coatings, sealants, and functional coatings, demonstrating efficient adaptability in fields such as building waterproofing and electronic packaging.