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US 2010/0249274 A1Published application
Coating compositions comprising a polyurethane polyol composition and nanoparticles, and process for preparing the same
AssigneeKing Abdulaziz City for Science and Technology
InventorsMohammed Abdullah Bahattab, Ahmed Ali Basfar, Khondoker Muhammad Idris, Mohammad Asif Alam
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Abstract
The invention relates to a coating composition comprising a polyurethane polyol composition comprising the reaction product of a polyisocyanate and a polyol, and modified nanoparticles of silica and/or alumina, and to a process for preparing such coating composition.
Claims21
A coating composition, comprising:
- a polyurethane polyol composition;
- a nanoparticle has a particle size in a range of 10 to 500 nm;
- a leveling agent;
- a drying agent;
- a surface modifier;
- and
- a dispersing agent.
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A method, comprising:
- mixing a surface modifier with a methanol-HCl solution;
- admixing a nanoparticle, the methanol-HCl solution and a water in a ratio of 3:2:3:2 (w/w);
- mechanically mixing the above mixture at 240 rpm;
- condensing the above mixture by refluxing in a round bottom flask;
- circulating a water through the condenser at about 18° C.;
- obtaining a white slurry after 45 minutes from the condenser;
- removing the excess water from the white slurry;
- mixing the white slurry with a polyurethane polyol composition, a dispersing agent, a leveling agent and a drying agent to make a coating composition.
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Dependencies are inferred from the claim text.