A method for forming an acrylic emulsion includes a step of forming pre-emulsion by combining a monomer composition with an amphoteric surfactant in water and then polymerizing the pre-emulsion by combining the pre-emulsion with a radical initiator in a reactor to form a reaction mixture. The monomer composition includes one or more monomers selected from the group consisting of (meth)acrylic acid monomers and (meth)acrylic monomers, and combinations thereof. An acrylic emulsion formed by the method is also provided.

A method for forming an acrylic emulsion includes a step of forming pre-emulsion by combining a monomer composition with an amphoteric surfactant in water and then polymerizing the pre-emulsion by combining the pre-emulsion with a radical initiator in a reactor to form a reaction mixture. The monomer composition includes one or more monomers selected from the group consisting of (meth)acrylic acid monomers and (meth)acrylic monomers, and combinations thereof. An acrylic emulsion formed by the method is also provided.

The present invention is directed to an aqueous dispersion comprising particles comprising a first polymer phase and a second polymer phase, where the second polymer phase comprises from 2 to 10% by weight of units based on acids copolymerizable with methacrylates, based on the entirety of the two polymer phases, and wherein the particles have a particle size dso, determined as given in the description, of from 100 to 150 nm, and wherein the entirety of the polymers comprised in the particles comprise of from 49 to 65% by weight of units based on methyl methacrylate and/or butyl methacrylate, of from 22 to 33% by weight of units based on a C1-C4-alkyl ester of acrylic acid, of from 3 to 7% by weight of units based on a hydroxy-functional (meth)acrylate, of from 2 to 8% by weight of units based on (meth)acrylic acid, and of from 5 to 15% by weight of units based on styrene, based on the total weight of the polymers, to a process for preparing an aqueous dispersion comprising a first polymer phase and a second polymer phase, where the second polymer phase comprises of from 2 to 10% by weight of units based on acids copolymerizable with methacrylates, based on the entirety of the monomers used to prepare the two polymer phases, wherein the aqueous dispersion is produced by means of emulsion polymerization, where a first monomer mixture which leads to the first polymer phase is used as or charged together with an initial charge into a reactor and, after polymerization of the first monomer mixture, a second monomer mixture which leads to the second polymer phase is added to the reaction mixture and polymerized, characterized in that a chain-transfer agent is added to both monomer mixtures, and wherein the entirety of monomers used is composed of from 49 to 65% by weight of methyl methacrylate and n-butyl methacrylate, of from 22 to 33% by weight of n-butyl acrylate, of from 3 to 7% by weight of hydroxy-ethyl acrylate, of from 2 to 8% by weight of acrylic acid, and of from 5 to 15% by weight of units based on styrene, based on the total amount of monomers present in both monomer mixtures, and to the use of an aqueous dispersion according to the invention or obtained by a process according to the invention in a heat-sealing lacquer for the sealing of aluminum surfaces with respect to aluminum, polystyrene (PS), polylactide (PLA), or other polymer materials used in food packaging, and to a heat-sealing lacquer for the sealing of aluminum surfaces with respect to aluminum, polystyrene (PS), polylactide (PLA), or other polymer materials used in food packaging, comprising at least 50% by weight of the aqueous dispersion according to the invention or obtained by a pro

The present invention is directed to an aqueous dispersion comprising particles comprising a first polymer phase and a second polymer phase, where the second polymer phase comprises from 2 to 10% by weight of units based on acids copolymerizable with methacrylates, based on the entirety of the two polymer phases, and wherein the particles have a particle size dso, determined as given in the description, of from 100 to 150 nm, and wherein the entirety of the polymers comprised in the particles comprise of from 49 to 65% by weight of units based on methyl methacrylate and/or butyl methacrylate, of from 22 to 33% by weight of units based on a C1-C4-alkyl ester of acrylic acid, of from 3 to 7% by weight of units based on a hydroxy-functional (meth)acrylate, of from 2 to 8% by weight of units based on (meth)acrylic acid, and of from 5 to 15% by weight of units based on styrene, based on the total weight of the polymers, to a process for preparing an aqueous dispersion comprising a first polymer phase and a second polymer phase, where the second polymer phase comprises of from 2 to 10% by weight of units based on acids copolymerizable with methacrylates, based on the entirety of the monomers used to prepare the two polymer phases, wherein the aqueous dispersion is produced by means of emulsion polymerization, where a first monomer mixture which leads to the first polymer phase is used as or charged together with an initial charge into a reactor and, after polymerization of the first monomer mixture, a second monomer mixture which leads to the second polymer phase is added to the reaction mixture and polymerized, characterized in that a chain-transfer agent is added to both monomer mixtures, and wherein the entirety of monomers used is composed of from 49 to 65% by weight of methyl methacrylate and n-butyl methacrylate, of from 22 to 33% by weight of n-butyl acrylate, of from 3 to 7% by weight of hydroxy-ethyl acrylate, of from 2 to 8% by weight of acrylic acid, and of from 5 to 15% by weight of units based on styrene, based on the total amount of monomers present in both monomer mixtures, and to the use of an aqueous dispersion according to the invention or obtained by a process according to the invention in a heat-sealing lacquer for the sealing of aluminum surfaces with respect to aluminum, polystyrene (PS), polylactide (PLA), or other polymer materials used in food packaging, and to a heat-sealing lacquer for the sealing of aluminum surfaces with respect to aluminum, polystyrene (PS), polylactide (PLA), or other polymer materials used in food packaging, comprising at least 50% by weight of the aqueous dispersion according to the invention or obtained by a pro

Methods for preparing water soluble, non-peptidic polymers carrying carboxyl functional groups, particularly carboxylic acid functionalized poly(ethylene glycol) (PEG) polymers are disclosed, as are the products of these methods. In general, an ester reagent R(CO)OR, wherein R is a tertiary group and R comprises a functional group X, is reacted with a water soluble, non-peptidic polymer POLY-Y, where Y is a functional group which reacts with X to form a covalent bond, to form a tertiary ester of the polymer, which is then treated with a strong base in aqueous solution, to form a carboxylate salt of the polymer. Typically, this carboxylate salt is then treated with an inorganic acid in aqueous solution, to convert the carboxylate salt to a carboxylic acid, thereby forming a carboxylic acid functionalized polymer.

Methods for preparing water soluble, non-peptidic polymers carrying carboxyl functional groups, particularly carboxylic acid functionalized poly(ethylene glycol) (PEG) polymers are disclosed, as are the products of these methods. In general, an ester reagent R(CO)OR, wherein R is a tertiary group and R comprises a functional group X, is reacted with a water soluble, non-peptidic polymer POLY-Y, where Y is a functional group which reacts with X to form a covalent bond, to form a tertiary ester of the polymer, which is then treated with a strong base in aqueous solution, to form a carboxylate salt of the polymer. Typically, this carboxylate salt is then treated with an inorganic acid in aqueous solution, to convert the carboxylate salt to a carboxylic acid, thereby forming a carboxylic acid functionalized polymer.

A photoresponsive material contains a nanoparticle with a perovskite crystal structure and a shell-like ligand that has a plurality of binding portions with an ionic structural unit and that has a polymer portion bound to the nanoparticle at a plurality of positions via the plurality of binding portions.

A coating composition for a food or beverage can that includes an emulsion polymerized latex polymer formed by combining an ethylenically unsaturated monomer component with an aqueous dispersion of a water-dispersible polymer.

Methods for preparing water soluble, non-peptidic polymers carrying carboxyl functional groups, particularly carboxylic acid functionalized poly(ethylene glycol) (PEG) polymers are disclosed, as are the products of these methods. In general, an ester reagent R(CO)OR, wherein R is a tertiary group and R comprises a functional group X, is reacted with a water soluble, non-peptidic polymer POLY-Y, where Y is a functional group which reacts with X to form a covalent bond, to form a tertiary ester of the polymer, which is then treated with a strong base in aqueous solution, to form a carboxylate salt of the polymer. Typically, this carboxylate salt is then treated with an inorganic acid in aqueous solution, to convert the carboxylate salt to a carboxylic acid, thereby forming a carboxylic acid functionalized polymer.

Methods for preparing water soluble, non-peptidic polymers carrying carboxyl functional groups, particularly carboxylic acid functionalized poly(ethylene glycol) (PEG) polymers are disclosed, as are the products of these methods. In general, an ester reagent R(CO)OR, wherein R is a tertiary group and R comprises a functional group X, is reacted with a water soluble, non-peptidic polymer POLY-Y, where Y is a functional group which reacts with X to form a covalent bond, to form a tertiary ester of the polymer, which is then treated with a strong base in aqueous solution, to form a carboxylate salt of the polymer. Typically, this carboxylate salt is then treated with an inorganic acid in aqueous solution, to convert the carboxylate salt to a carboxylic acid, thereby forming a carboxylic acid functionalized polymer.