# US 2013/0158210 A1 · Reduction of the fraction of monomers comprising isocyanate groups in moisture-curing polyurethane compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158210 A1 - Document ID: US20130158210A1 - Status: Published application - Kind: A1 - Application number: 13/819,433 - Filed: 2011-10-06 - Published: 2013-06-20 - Earliest claimed: 2010-10-06 - Assignees: Sika Technology AG - Inventors: Laila Hossain; Dario Veghini - Web page: https://patentgrep.com/patent/US20130158210A1 ## CPC - C08L 75/04: Polyurethanes - C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step - C08G 18/12: using two or more compounds having active hydrogen in the first polymerisation step - C08G 18/3893: {containing silicon} - C08G 18/3895: {Inorganic compounds, e.g. aqueous alkalimetalsilicate solutions; Organic derivatives thereof containing no direct silicon-carbon bonds} - C08K 9/06: with silicon-containing compounds - C08K 2201/005: Additives being defined by their particle size in general - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract The invention relates to a composition having at least one polyurethane polymer comprising isocyanate groups, at least one monomer comprising isocyanate groups, and at least one silicon dioxide comprising on its surface functional groups which are reactive with respect to isocyanate groups. The silicon dioxide is present in the form of particles which have an average particle size of ≦100 μm and a specific surface area of ≧100 m2/g. Furthermore, the functional groups of the silicon dioxide are at least partially reacted with isocyanate groups of the monomer comprising isocyanate groups. ## Claims ### Claim 1 A composition, comprising at least one polyurethane polymer comprising isocyanate groups; at least one monomer comprising isocyanate groups; and at least one silicon dioxide comprising on its surface functional groups which are reactive with respect to isocyanate groups, wherein the silicon dioxide is present in the form of particles which have an average particle size of ≦100 μm and a specific surface area of ≧100 m2/g; and wherein the functional groups of the silicon dioxide are at least partially reacted with isocyanate groups of the monomer comprising isocyanate groups. ### Claim 2 (depends on 1) The composition according to claim 1, wherein the silicon dioxide on its surface is functionalized with functional groups which are reactive with respect to isocyanate groups. ### Claim 3 (depends on 1) The composition according to claim 1, wherein the silicon dioxide is present in the form of particles which have an average particle size of ≧1 μm. ### Claim 4 (depends on 1) The composition according to claim 1, wherein the silicon dioxide is present in the form of particles having an average particle size in the range from 50 to 60 μm. ### Claim 5 (depends on 1) The composition according to claim 1, wherein the silicon dioxide is present in the form of particles having a specific surface area in the range of of ≧300 m2/g. ### Claim 6 (depends on 5) The composition according to claim 5, wherein the specific surface area is in the range from 400 to 800 m2/g. ### Claim 7 (depends on 1) The composition according to claim 1, wherein the silicon dioxide is present in the form of particles which are porous, the pores having a size in the range from 0.4 to 50 nm. ### Claim 8 (depends on 1) The composition according to claim 1, wherein the functional groups which are reactive with respect to isocyanate groups are amino groups. ### Claim 9 (depends on 1) The composition according to claim 1, wherein the silicon dioxide is functionalized with an organosilane the organic moiety of which comprises at least one functional group which is reactive with respect to isocyanate groups. ### Claim 10 (depends on 1) The composition according to claim 1, wherein the fraction of the silicon dioxide is from 0.01 to 10% by weight, based on the total composition. ### Claim 11 (depends on 1) The composition according to claim 1, wherein the composition has a content of monomers comprising isocyanate groups of ≧1.5% by weight, based on the total composition. ### Claim 12 (canceled) ### Claim 13 A method for reducing the fraction of monomers comprising isocyanate groups in a composition having at least one polyurethane polymer comprising isocyanate groups and at least one monomer comprising isocyanate groups, comprising the steps of providing a composition containing at least one polyurethane polymer comprising isocyanate groups, and at least one monomer comprising isocyanate groups; combining the composition with a silicon dioxide comprising on its surface functional groups which are reactive with respect to isocyanate groups, wherein the silicon dioxide is present in the form of particles which have an average particle size of ≦100 μm and a specific surface area of ≧100 m2/g. ### Claim 14 A method of reducing the fraction of monomers comprising isocyanate groups in compositions having at least one polyurethane polymer comprising isocyanate groups and at least one monomer comprising isocyanate groups with silicon dioxide comprising on its surface functional groups which are reactive with respect to isocyanate groups, wherein the silicon dioxide is present in the form of particles which have an average particle size of ≦100 μm and a specific surface area of ≧100 m2/g.