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1. (WO2012122102) LIGHTWEIGHT GYPSUM WALLBOARD
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2012/122102 International Application No.: PCT/US2012/027725
Publication Date: 13.09.2012 International Filing Date: 05.03.2012
IPC:
C04B 20/06 (2006.01) ,C04B 38/00 (2006.01) ,C04B 22/14 (2006.01) ,C04B 26/28 (2006.01)
Applicants: FRANCIS, Hubert C.[US/US]; US (UsOnly)
GEORGIA-PACIFIC GYPSUM LLC[US/US]; 133 Peachtree Street NE Atlanta, GA 30303, US (AllExceptUS)
Inventors: FRANCIS, Hubert C.; US
Agent: SABNIS, Ram W.; Georgia-Pacific LLC 133 Peachtree Street NE Atlanta, GA 30303, US
Priority Data:
61/451,38410.03.2011US
Title (EN) LIGHTWEIGHT GYPSUM WALLBOARD
(FR) PANNEAU DE PLACOPLÂTRE LÉGER
Abstract: front page image
(EN) A lightweight gypsum wallboard having a foamed gypsum core reinforced with pre-gelatinized, e.g., pre-gelled, starch and prepared by mixing an aqueous foam into a gypsum slurry comprising a source of calcined gypsum (commonly known as plaster of Paris), pre-gelled starch and a lignosulfonate dispersant; allowing the so-formed gypsum slurry to set, and then drying the set gypsum core.
(FR) Cette invention concerne un panneau de placoplâtre léger contenant un noyau de gypse cellulaire renforcé par de l'amidon préalablement gélatinisé, par exemple préalablement gélifié. Ce panneau est préparé en mélangeant une mousse aqueuse introduite dans une suspension de gypse comprenant une source de gypse calciné (généralement connu sous le nom de plâtre de Paris), de l'amidon préalablement gélifié et un agent de dispersion à base de lignosulfonate ; en laissant durcir la suspension de gypse ainsi formée, puis en séchant le noyau de gypse durci.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)