Abstract: The present invention is a composition comprising an aqueous dispersion of polymer particles, polymeric organic crosslinked microspheres, and colloidal silica particles. The composition is useful in coating compositions for exterior applications to achieve a balance of excellent dirt pickup resistance and durability performance under accelerated testing conditions.

Abstract: An aqueous composition comprising: (a) an aqueous dispersion of hybrid polymer particles with a fluorine content of 5% or more, wherein the hybrid polymer particles comprise, based on the weight of the hybrid polymer particles, (i) greater than 20% to 75% by weight of a first polymer component comprising a fluoroethylene vinyl ether copolymer, and (ii) from 25% to less than 80% by weight of a second polymer component, wherein the second polymer component is an acrylic copolymer comprising, based on the weight of the acrylic copolymer, from 0.15% to 1.2% by weight of structural units of a phosphorus-containing acid monomer, a salt thereof, or mixtures thereof, and structural units of a monoethylenically unsaturated nonionic monomer; and (b) from 5% to 30% by dry weight of colloidal silica, based on the total weight of the hybrid polymer particles and the dry weight of the colloidal silica. The aqueous composition can provide coatings with balanced dirt pick-up resistance and durability properties.

Abstract: An ultrasonic probe coupling assembly (1) and an ultrasonic probe mechanism are disclosed. The ultrasonic probe coupling assembly (1) includes a probe sleeve (11) and a solid-state coupling member (12). The probe sleeve (11) is sleeved on an ultrasonic probe (2). The solid-state coupling member (12) is fixed in the probe sleeve (11). One side of the solid-state coupling member (12) is located in the probe sleeve (11) for fitting to the ultrasonic probe (2), and the other side is protruded from the probe sleeve (11) to be in contact with the skin. The ultrasonic probe mechanism includes the ultrasonic probe coupling assembly (1) and the ultrasonic probe (2).

Abstract: A stable aqueous dispersion comprising an emulsion polymer and a specific amount of a linear siloxane, a cyclic siloxane, or mixtures thereof; an aqueous coating composition comprising the aqueous dispersion providing coatings with improved dirt pick-up resistance and long-term durability.

Abstract: The present invention relates to a benzophenone derivative and an aqueous copolymer dispersion comprising the benzophenone derivative. This invention also relates to an aqueous coating composition comprising the aqueous copolymer dispersion. The benzophenone derivative provides better crosslinking efficiency and improvement to dirt pick up resistance performance.

Abstract: The present invention relates to a benzophenone derivative and an aqueous copolymer dispersion comprising the benzophenone derivative. This invention also relates to an aqueous coating composition comprising the aqueous copolymer dispersion. The benzophenone derivative provides better crosslinking efficiency and improvement to dirt pick up resistance performance.

Abstract: An ultrasonic probe coupling assembly (1) and an ultrasonic probe mechanism are disclosed. The ultrasonic probe coupling assembly (1) includes a probe sleeve (11) and a solid-state coupling member (12). The probe sleeve (11) is sleeved on an ultrasonic probe (2). The solid-state coupling member (12) is fixed in the probe sleeve (11). One side of the solid-state coupling member (12) is located in the probe sleeve (11) for fitting to the ultrasonic probe (2), and the other side is protruded from the probe sleeve (11) to be in contact with the skin. The ultrasonic probe mechanism includes the ultrasonic probe coupling assembly (1) and the ultrasonic probe (2).

Abstract: The present invention provides a novel aqueous coating composition comprising a multi-stage aqueous emulsion polymer, an anionic colloidal silica, and a thickener. This novel aqueous coating composition provides low gloss, while maintaining good physical stability and transparency.

Abstract: This invention relates to a process for preparing color dispersions comprising a first step of contacting water, a first colorant, and a polysaccharide selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof, to form a first colorant dispersion; a second step of contacting the first colorant dispersion with a protective composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles; an optional third step of repeating the first step and the second step with a second colorant that is different from the first colorant to form a dispersion of protected second colorant particles; and an optional fourth step of mixing the dispersions of protected first and second colorant particles to form a multi-color dispersion.

Abstract: The present invention provides a novel aqueous coating composition comprising a multi-stage aqueous emulsion polymer, an anionic colloidal silica, and a thickener. This novel aqueous coating composition provides low gloss, while maintaining good physical stability and transparency.

Abstract: The present invention provides a dispersion of polymer particles comprising, as polymerized units, by dry weight based on total dry weight of the polymer particles, from 85% to 99.9% ethylenically unsaturated nonionic monomers, from 0.01% to 4% phosphorous-containing (meth)acrylate monomers, and at least one neutralizer. The final pH of the polymer dispersion is above 6, and from 50% to 100% by mole of the total neutralizers are alcohol amines. The present invention further provides a paint comprising said dispersion. The paint has both satisfactory paint viscosity stability and improved paint performances such as scrub resistance, stain resistance, corrosion resistance and durability.

Abstract: This invention relates to a process for preparing color dispersions comprising a first step of contacting water, a first colorant, and a polysaccharide selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof, to form a first colorant dispersion; a second step of contacting the first colorant dispersion with a protective composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles; an optional third step of repeating the first step and the second step with a second colorant that is different from the first colorant to form a dispersion of protected second colorant particles; and an optional fourth step of mixing the dispersions of protected first and second colorant particles to form a multi-color dispersion.

Abstract: This invention relates to a process for preparing color dispersions comprising a first step of contacting water, a first colorant, and a polysaccharide selected from methylcellulose, hydropropylmethylcellulose, hydroxyethylmethylcellulose, hydroxybutylmethylcellulose, hydroxyethylethylcellulose, and the mixture thereof, to form a first colorant dispersion; a second step of contacting the first colorant dispersion with a protective composition comprising an aqueous dispersion of polymer particles, clay, and a peptizing agent to form a dispersion of protected first colorant particles; an optional third step of repeating the first step and the second step with a second colorant that is different from the first colorant to form a dispersion of protected second colorant particles; and an optional fourth step of mixing the dispersions of protected first and second colorant particles to form a multi-color dispersion.

Abstract: The present invention provides a binder composition comprising a first binder comprising by dry weight based on total dry weight of the first binder, from 5% to 98% of polymer particles, from 0.3% to 10% of a first polysaccharide, from 0.01% to 5% of a crosslinker, from 0.3% to 6% of a water-soluble metal cation, and from 0.05% to 3% of a cationic polyelectrolyte. The binder composition may further comprise a second binder comprising by dry weight based on total dry weight of the second binder, from 0.3% to 20% of the first polysaccharide, from 0.5% to 20% of a second polysaccharide. And in that case, the wet weight ratio of the first binder to the second binder is from 1:20 to 20:1. The present invention further provides a paint formulation comprising the binder composition.

Abstract: The present invention provides a new process of preparation for PUA with superior mechanical performance, such as elongation, and tensile strength. The process is solvent free, smooth, and robust. PU prepolymer prepared according to the present invention has low viscosity, and contains no particulate DMPA.

Abstract: The present invention further provides a binder composition comprising a first binder and a second binder, wherein the first binder comprises, by dry weight based on total dry weight of the binder composition, from 5% to 98% polymer particles, from 0.3% to 20% a first polysaccharide, and from 0.1% to 20% a colorant; and the second binder comprises, by dry weight based on total dry weight of the binder composition, from 0.05% to 5% a crosslinker. The present invention further provides a paint formulation comprising the binder composition.

Abstract: The present invention provides a dispersion of polymer particles comprising, as polymerized units, by dry weight based on total dry weight of the polymer particles, from 85% to 99.9% ethylenically unsaturated nonionic monomers, from 0.01% to 4% phosphorous-containing (meth)acrylate monomers, and at least one neutralizer. The final pH of the polymer dispersion is above 6, and from 50% to 100% by mole of the total neutralizers are alcohol amines. The present invention further provides a paint comprising said dispersion. The paint has both satisfactory paint viscosity stability and improved paint performances such as scrub resistance, stain resistance, corrosion resistance and durability.

Abstract: The present invention provides a binder composition comprising a first binder comprising by dry weight based on total dry weight of the first binder, from 5% to 98% of polymer particles, from 0.3% to 10% of a first polysaccharide, from 0.01% to 5% of a crosslinker, from 0.3% to 6% of a water-soluble metal cation, and from 0.05% to 3% of a cationic polyelectrolyte. The binder composition may further comprise a second binder comprising by dry weight based on total dry weight of the second binder, from 0.3% to 20% of the first polysaccharide, from 0.5% to 20% of a second polysaccharide. And in that case, the wet weight ratio of the first binder to the second binder is from 1:20 to 20:1. The present invention further provides a paint formulation comprising the binder composition.

Abstract: The present invention relates to a polymer dispersion of polymer particles comprising phosphorous-containing (meth)acrylate monomers and phosphorus-containing allylic monomers. The present invention further relates to a coating composition made from the polymer dispersion with both satisfactory coating viscosity stability and improved coating performances such as scrub resistance, stain resistance, corrosion resistance and durability.

Abstract: The present invention relates to a polymer dispersion of polymer particles comprising phosphorous-containing (meth)acrylate monomers and phosphorus-containing allylic monomers. The present invention further relates to a coating composition made from the polymer dispersion with both satisfactory coating viscosity stability and improved coating performances such as scrub resistance, stain resistance, corrosion resistance and durability.