The present disclosure relates to a process for obtaining and formulating functional silica particles and other materials with active ingredients/compounds for use in polymers, paints, mortars, ceramic, cement, textile, pharmaceutics, varnishes, paper, clays, cosmetics, sensors and effluents.

The present disclosure describes a functional particle for binding to a substrate comprising:

a granule comprising oxide or hydroxide of an element selected from the following list: silica, magnesium, zinc, iron, copper, silver, aluminum, gold, titanium, or mixtures thereof having a size between 90 nm-500 nm;

a binder comprising silane-based compounds which binds the outer granule to the substrate;

a functional compound/active compound bound to the surface of the granule, to the binder, or to both;

wherein the functional compound is at least one of the following compounds: anti-mosquito/repellent/anti-insect, fungicide, antimicrobial/bactericide, antimycotic, anti-fire, UV protectors, larvicides, hydrophobics, vitaminics, moisturizers, cosmetics, drugs, mechanical properties, magnetic properties enhancement, or mixtures thereof.

A coating composition is provided comprising nanoparticles and certain polymers comprising carboxylic acid groups or salts thereof. When applied to articles, the coating is resistant to soiling by both dry dust and wet soil. Coated articles and methods of applying coatings are also described herein.

This invention discloses spray-based methods for generating polymer-based coatings with a range of morphologies, chemical reactivities, and physical stabilities useful for a broad range of applications, such as for the fabrication of non-wetting and slippery surfaces. Certain embodiments of this invention provide coatings with nanoscale morphologies, physical stabilities, and chemical reactivities that are similar to or improved compared to analogous coatings and materials made using conventional dip coating or flow-based methods. These spray-based methods can also be used to fabricate coatings with substantially similar functional properties, but with improved consistency, efficiency, additional functionality, and reproducibility. In an aspect of the invention, two or more chemically reactive polymer solutions are sprayed onto a substrate to form a crosslinked polymer coating on the substrate. The polymer solutions may be applied to the substrate sequentially or simultaneously.

Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.

Provided herein are metal nanoclusters, having a high absorption to volume ratio, and uses of the same, such as in generating singlet oxygen, or in protecting surfaces from high intensity light.

The present invention includes processes and methods of preparing the hybrid polymer latex for coating composition that can be used for traffic markings, transportation and signages. The process may comprise preparing an initial monomer mix pre-emulsion of unsaturated organic compounds, preparing an initial inorganic dispersion feed comprising modified inorganic component, preparing an initiator solution, and adding at least 2 parts per 100 parts polymer by weight of polyfunctional amines to result in final hybrid polymer latex. The coating composition obtained by the disclosed process provides superior qualities of moisture proofing, water repellence and early rain resistance to enhance durability of the product.

Dispersions of nanoparticles in a resin component are described. The nanoparticles have a multimodal particle size distribution including at least a first mode and a second mode. The number average particle diameter of the particles in the first mode is greater than the number average particle size distribution in the second mode. The use of multimodal nanoparticle size distributions and the relative number of particles in the first and second mode to reduce or eliminate particle stacking behavior is also described.

The present invention refers to a process for the preparation of an additive with a metallic hydroxide base, and especially of magnesium hydroxide, to be integrated in coatings with the purpose to give them higher flame retarding properties. The hydroxide has an average particle size that is selected from between 1 nanometer and 10 microns preferable with a wide variety, the magnesium hydroxide is submitted to a treatment of washing and dispersion, mainly so that they efficiently are dispersed in, and do not interfere with, the desired properties of the coating. The nature of the coating function is selected from the materials and the conditions of the treatment, as well as the size of the particle. The objective coating can have a base of water, solvents, oil, and alcohol. Compared with coatings formed with other flame retarding compositions, the additive of the invention presents less loss of weight by means of burning through ASTM D1360 standards.

The present invention relates to a nano-diamond dispersion solution and a method of preparing the same. The method of preparing a nano-diamond dispersion solution comprises the following steps: providing a nano-diamond aggregation; mixing the nano-diamond aggregation with a metal hydroxide solution and stirring the mixture such that the nano-diamond aggregation is separated, to obtain a mixture solution; stabilizing the mixture solution such that the mixture solution is separated into a supernatant and precipitates; and extracting the supernatant and precipitates.

An antireflection coating film for an optical element is provided on a surface of a substrate of an optical material and includes first particles having a refractive index (nd) of at least 2.2 or more for the d-line and an average particle size of 10 to 70 nm, second particles of at least one of silica and sericite and having an average particle size of 1 to 11 μm, a colorant of an organic substance and soluble in an organic solvent, and a resin, in which the first particle content is in the range of 10% to 35% by weight, and second particle content is in the range of 1% to 11% by weight. The antireflection coating film has a high effect of preventing surface reflection, a high effect of preventing inner-surface reflection, satisfactory absorption of visible light, and low levels of reflection and scattering in the film.