# US 8,465,586 B2 · Polysaccharide derivatives having an adjusted particle morphology for hydrolytically setting compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,586 B2 - Document ID: US8465586B2 - Status: Granted - Kind: B2 - Application number: 13/185,610 - Filed: 2011-07-19 - Published: 2012-02-02 - Granted: 2013-06-18 - Earliest claimed: 2010-07-28 - Assignees: Dow Global Technologies LLC - Applicants: Robert Baumann; Yvonne Goerlach-Doht; Marco Grosstueck; Juergen Hermanns; Joerg Neubauer - Inventors: Robert Baumann; Yvonne Goerlach-Doht; Marco Grosstueck; Juergen Hermanns; Joerg Neubauer - Web page: https://patentgrep.com/patent/US8465586B2 ## CPC - C04B 28/10: Lime cements or magnesium oxide cements - C04B 28/02: containing hydraulic cements other than calcium sulfates - C04B 28/14: containing calcium sulfate cements {(gypsum-paper plates E04C)} - C04B 2103/0081: {Deflocking agents} - C04B 2111/00155: {Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite} - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE ## Abstract The present invention relates to polysaccharide derivatives having an adjusted particle morphology for use in the preparation of a hydraulic setting composition having an adjusted lump rating. The invention further relates to a method of adjusting the lump rating of a hydraulic setting composition comprising adjusting the particle morphology of a particulate polysaccharide derivative. Furthermore, the invention is directed to a hydraulic setting composition comprising a particulate polysaccharide derivative having an adjusted particle morphology. The invention is also directed to various uses of the particulate polysaccharide derivative having an adjusted particle morphology. ## Claims ### Claim 1 A method of making a hydraulic setting composition comprising adding a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters having a median particle diameter DOP (50,3) of at least 38 micrometers and a median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers to the hydraulic setting composition. ### Claim 2 (depends on 1) The method of claim 1, wherein the hydraulic setting composition is free of any particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters prior to adding the particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters having a DOP (50,3) of at least 38 micrometers and an EQPC (50,3) of at least 80 micrometers. ### Claim 3 (depends on 1, 2) The method of claim 1 or 2, further comprising adjusting the lump rating of the hydraulic setting composition by adjusting the DOP (50,3) and the EQPC (50,3) of the particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters added to the hydraulic setting composition. ### Claim 4 A method of making a hydraulic setting composition, wherein the composition comprises a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, and, further wherein the method comprises ensuring that the particulate polysaccharide derivative has a median particle diameter DOP (50,3) of at least 38 micrometers and a median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers. ### Claim 5 A method of adjusting the lump rating of a hydraulic setting composition, the method comprising the steps of: a) providing a hydraulic setting composition which is free of any particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, and b) adding a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters having an adjusted median particle diameter DOP (50,3) of at least 38 micrometers and an adjusted median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers to the hydraulic setting composition. ### Claim 6 (depends on 1, 2, 4, 5) The method according to claim 1, 2, 4 or 5, wherein the composition is a gypsum plaster, a lime plaster, a cement plaster, or a mixture of one or more of these plasters or is a gypsum spray plaster, a lime spray plaster, a cement spray plaster, or a mixture of one or more of these spray plasters. ### Claim 7 (depends on 1, 2, 4, 5) The method according to claim 1, 2, 4 or 5, wherein the polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters is a cellulose derivative. ### Claim 8 (depends on 1, 2, 4, 5) The method according to claim 1, 2, 4 or 5, wherein the particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters having the DOP (50,3) of at least 38 micrometers and the EQPC (50,3) of at least 80 micrometers is produced by dry-grinding a moist polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, and, further wherein, the DOP (50,3) of at least 38 micrometers and the EQPC (50,3) of at least 80 micrometers of the particles after dry-grinding is adjusted by adjusting the moisture content and the temperature of the polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters prior to dry-grinding. ### Claim 9 (depends on 8) The method according to claim 8, wherein the dry-grinding is conducted in a rotational dry-grinding device, and wherein the DOP (50,3) and the EQPC (50,3) of the particles after dry-grinding is adjusted by adjusting the circumferential speed of the dry-grinding device in addition to adjusting the moisture content and the temperature of the polysaccharide derivative prior to dry-grinding. ### Claim 10 A hydraulic setting composition comprising a particulate polysaccharide derivative selected from a group consisting of polysaccharide ethers and esters, wherein the particulate polysaccharide derivative has a median particle diameter DOP (50,3) of at least 38 micrometers and a median particle diameter of the equivalent particle circle EQPC (50,3) of at least 80 micrometers. ### Claim 11 (depends on 10) The composition according to claim 10, wherein the composition is a mortar or plaster composition. ### Claim 12 (depends on 10, 11) The composition according to claim 10 or 11, wherein the polysaccharide derivative is a cellulose derivative selected from a group consisting of polysaccharide ethers and esters.