# US 2008/0306201 A1 · Acrylic Compositions Comprising Nanoparticulate Zinc Oxide Uv Absorber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0306201 A1 - Document ID: US20080306201A1 - Status: Published application - Kind: A1 - Application number: 10/583,615 - Filed: 2004-12-22 - Published: 2008-12-11 - Earliest claimed: 2003-12-24 - Inventors: Reno Emilio Beltrame; Michael Ary Bos - Web page: https://patentgrep.com/patent/US20080306201A1 ## CPC - C08K 3/22: of metals - C08K 2003/2296: {of zinc} - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract The invention relates to an acrylic composition comprising an acrylic component selected from acrylic resins and precursors thereof and a nonoparticulate zinc oxide UV absorber wherein the acidity of the acrylic composition is less than 0.5 g KOH per kilogram of resin solids. ## Claims ### Claim 1 An acrylic composition comprising an acrylic component selected from acrylic resins and precursors thereof and a nonoparticulate zinc oxide UV absorber wherein the acidity of the acrylic composition is less than 0.5 g KOH per kilogram of resin solids. ### Claim 2 (depends on 1) An acrylic composition according to claim 1 wherein the zinc oxide component comprises at least 80% by weight of particles of size in the range of from 10 to 100 nm. ### Claim 3 (depends on 2) An acrylic composition according to claim 2 wherein the zinc oxide component comprises at least 90% by weight in the range of from 10 to 50 nm. ### Claim 4 (depends on 1) A composition according to claim 1 wherein the zinc oxide is present in an amount of from loading 0.5%-50.0% by weight based on solids in acrylic resin. ### Claim 5 (depends on 1) An acrylic composition according to claim 1 where the acrylic component is selected from the group consisting of resins and monomer compositions for preparation thereof where a significant fraction of the monomeric units are selected from the group consisting of acrylic and methacrylic esters. ### Claim 6 (depends on 1) An acrylic composition according to claim 1 wherein the acrylic component comprises a high molecular weight thermoplastic acrylic resin. ### Claim 7 (depends on 1) An acrylic composition according to claim 1 wherein the acrylic component comprises a thermo setting acrylic resin or non-aqueous dispersion (NAD) acrylic which is a thermosetting solution. ### Claim 8 (depends on 1) An acrylic composition according to claim 1 in the form of an oil in water emulsion. ### Claim 9 (depends on 1) An acrylic composition according to claim 1 where the acrylic component comprises copolymers of acrylate and/or methacrylate esters of organic alcohols with other unsaturated monomers capable of reacting by additional polymerisation in aqueous media. ### Claim 10 (depends on 1) An acrylic composition according to claim 1 wherein the resin or precursor comprises acrylate and/or methacrylate ester monomers having alcohol portions selected from one or more of the groups of alkyl, hydroxyalkyl, alkoxyalkyl, alkylaminoalkyl and dialkylaminoalkyl. ### Claim 11 (depends on 1) An acrylic composition according to claim 1 wherein the acrylic component is an acrylic polymer resin in an aqueous emulsion. ### Claim 12 (depends on 8) An acrylic composition according to claim 8 wherein the organic solids content is in the range of 10-60%. ### Claim 13 (depends on 1) An acrylic composition according to claim 1 prepared by milling zinc oxide in the presence of dispersants selected from the group consisting of surfactants and hydroxylated organic compounds and mixing the milled zinc oxide dispersion with acrylic emulsion having an acidity of less than 0.5 g KOH per kilogram of resin solids. ### Claim 14 A method of manufacture of a zinc oxide stabilized acrylic composition comprising forming an acrylic composition having an acidity of less than 0.5 g KOH per kilogram of resin solids and dispersing therein a nanoparticulate zinc oxide composition. ### Claim 15 (depends on 1) An acrylic composition according to claim 1 wherein the acrylic component is acryclic monomer of acidity less than 0.5 g KOH per kilogram resin and forms a coating on the nanoparticulate zinc oxide. ### Claim 16 A method of forming a zinc oxide stabilizing agent for an acrylic composition comprising: contacting the zinc oxide nanoparticles with an acrylic monomer to form a coating of the monomer on the zinc nanoparticulates; polymerizing a monomer composition comprising acrylic monomer in the presence of the acrylic monomer coated zinc oxide nanoparticles to provide zinc oxide encapsulated in acrylic resin wherein the acidity of the acrylic resin is less than 0.5 g KOH per kilogram of resin. ### Claim 17 (depends on 1) A coating composition comprising and acrylic composition according to claim 1 one or more components selected from the group consisting of surfactants, defoamers, chain transfer agents, plasticisers initiators and stabilisers. ### Claim 18 (depends on 17) A coating composition according to claim 17 applied to textiles.