Provided are a titanium dioxide aqueous dispersion having high dispersibility and little aggregation or coarse particles, and a method for producing the same. The titanium dioxide aqueous dispersion contains titanium dioxide particles having a hydrophobic compound such as a higher fatty acid or a salt thereof on the surface, an aqueous dispersion medium, a nonionic surfactant having an HLB value of 10 or higher, and a basic compound such as an alkanolamine, and the pH is in the 8.5-13 range. The method for producing a titanium dioxide aqueous dispersion has a step for mixing the titanium dioxide particles having a hydrophobic compound on the surface, the aqueous dispersion medium, the nonionic surfactant having an HLB value of 10 or higher, and the basic compound to bring the pH of the aqueous dispersion into the 8.5-13 range.

An object is to providing a coating composition for attaining excellent storage stability of a coating material, excellent stain resistance (a property of preventing stains from adhering or a property of removing stains) of a coating film, and excellent durability of stain resistance of the coating film, and excellent scratch resistance of the coating film, and having transparency, and protecting the appearance for a long period of time, as well as a method of forming the coating film of the same. As a solution, provided is a coating composition comprising a silyl group-containing acrylic resin (A), a silyl group-free acrylic resin containing hydroxyl group (B), a polyisocyanate compound (C), and a catalyst (D), wherein the silyl group-containing acrylic resin (A) includes at least one polydimethyl siloxane segment.

The disclosure pertains to thermochromic materials, coatings, to coated articles and to preparation methods. In addition, the disclosure relates to thermochromic particulate material comprising vanadium (IV) oxide. A described preparation method involves curing of the coating using two curing stages performed with different oxygen levels.

According to an example aspect of the present invention, there is provided a composition comprising colloidal lignin particles and an epoxy compound.

According to an example aspect of the present invention, there is provided a composition comprising colloidal lignin particles and an epoxy compound.

An aqueous dispersion of multistage polymeric particles comprising at least two polymers, a process for preparing the aqueous dispersion of multistage polymeric particles; and an aqueous coating composition comprises such aqueous dispersion of multistage polymeric particles providing coatings with hot resistance, alcohol resistance, alkali resistance and acetic acid resistance.

An aqueous dispersion of multistage polymeric particles comprising at least two polymers, a process for preparing the aqueous dispersion of multistage polymeric particles; and an aqueous coating composition comprises such aqueous dispersion of multistage polymeric particles providing coatings with hot resistance, alcohol resistance, alkali resistance and acetic acid resistance.

The present invention provides a biodegradable formulation and its use as a surfaces restoring agent, said formulation allows a substantial savings when restoring the existing paint on different surfaces, since it mainly cleans and restores the surface or paint contaminated by the environment, damaged due to the sun and the processes of the different industries, in addition to being friendly to the environment, making it a useful technology in any industrial branch that involves cleaning and restoring large areas. It is worth noting that the modifications to the original formula were made to optimize the results in the different applications and improve its biodegradability.

A sol-gel material for overcoating a surface-relief structure includes a titanium(IV) precursor, and a titanium oxide stabilizer including R.sup.3OC(O)OR.sup.4, R.sup.5C(O)OR.sup.6, or a combination. R.sup.3 and R.sup.4 include alkyl or alkene groups optionally containing carboxylate, alcohol, or ester functionalities, such as propylene carbonate (PC). R.sup.5 and R.sup.6 include alkyl or alkene groups optionally containing carboxylate, alcohol, or ester functionalities, for example, a lactone such as gamma butyrolactone (GBL). In some embodiments, the sol-gel material includes a source of sulfate or phosphate anions, an acid, a base, a peroxide, a surfactant, a cross-linker, a flexibilizer, a toughener additive, a solvent, or a combination thereof. In some embodiments, the sol-gel material is annealed at a temperature between 50-150° C., and then annealed at a temperature between 200-300° C. In some embodiments, the sol-gel material is cured using ultraviolet light before annealing at a temperature between 200-300° C.

A sol-gel material for overcoating a surface-relief structure includes a titanium(IV) precursor, and a titanium oxide stabilizer including R.sup.3OC(O)OR.sup.4, R.sup.5C(O)OR.sup.6, or a combination. R.sup.3 and R.sup.4 include alkyl or alkene groups optionally containing carboxylate, alcohol, or ester functionalities, such as propylene carbonate (PC). R.sup.5 and R.sup.6 include alkyl or alkene groups optionally containing carboxylate, alcohol, or ester functionalities, for example, a lactone such as gamma butyrolactone (GBL). In some embodiments, the sol-gel material includes a source of sulfate or phosphate anions, an acid, a base, a peroxide, a surfactant, a cross-linker, a flexibilizer, a toughener additive, a solvent, or a combination thereof. In some embodiments, the sol-gel material is annealed at a temperature between 50-150° C., and then annealed at a temperature between 200-300° C. In some embodiments, the sol-gel material is cured using ultraviolet light before annealing at a temperature between 200-300° C.