Fudan University

Behr Process Corporation

Shuxue Zhou

Limin Wu

Ming-Ren Tarng

Yongchun Chen

Jigui Li

Jinzhen Shi

Ling Yang

Guangxin Gu

Bo You

A composition for forming a hydrophilic coating includes an organic binder having an average particle size from about 1 to about 100 nm and an inorganic binder having an average particle size from about 1 to about 40 nm. The composition further includes an inorganic photocatalyst that catalyzes an oxidation-reduction reaction. Characteristically, the photocatalyst includes a photocatalytic metal oxide having an average particle size from about 1 to about 50 nm. Advantageously, coatings formed from the composition have improved stain resistance, low contact angle, and resistance to dirt adherence, while maintaining a clear optical character.

Superhydrophilic coating composition

A high solid polyester polyol/silica nanocomposite resin with low viscosity is synthesized by an in situ polymerization method, namely conducting condensation polymerization of polyol/diacid monomer with a molar ratio of 1.1&#x2dc;1.5 in the presence of colloidal silica nanoparticles with a diameter of 10&#x2dc;150 nm. The resulted nanocomposite resins has a solid content of &#x3e;95%, molecular weight of 1000&#x2dc;5000 g/mol and hydroxyl value of 80-200 mg KOH/g, and a viscosity in the range of 800-2000 mPa.s. The viscosities are especially lower than those obtained by a blending method. The nanosilica content in the nanocomposite resin is 1&#x2dc;15% (based on the total solid content of nanocomposite resin). The high solid polyester polyol/silica nanocomposite resin was curable with isocyanate or melamine to prepare high solid transparent nanocomposite coatings with obviously improved abrasion and scratch resistance, hardness, weatherability etc.

Preparation of high solid polyester polyol/silica nanocomposite resin with low viscosity and related nanocomposite coatings

Growing community of inventors

Shanghai, China

Shuxue Zhou