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1. (WO2001034909) MANUFACTURE OF PAPER AND PAPERBOARD
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/034909 International Application No.: PCT/EP2000/010821
Publication Date: 17.05.2001 International Filing Date: 02.11.2000
Chapter 2 Demand Filed: 21.05.2001
IPC:
D21H 17/43 (2006.01) ,D21H 17/44 (2006.01) ,D21H 17/66 (2006.01) ,D21H 17/67 (2006.01) ,D21H 17/68 (2006.01) ,D21H 21/10 (2006.01) ,D21H 23/14 (2006.01) ,D21H 23/76 (2006.01)
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
17
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
20
Macromolecular organic compounds
33
Synthetic macromolecular compounds
34
obtained by reactions only involving carbon-to-carbon unsaturated bonds
41
containing ionic groups
42
anionic
43
Carboxyl groups or derivatives thereof
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
17
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
20
Macromolecular organic compounds
33
Synthetic macromolecular compounds
34
obtained by reactions only involving carbon-to-carbon unsaturated bonds
41
containing ionic groups
44
cationic
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
17
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
63
Inorganic compounds
66
Salts, e.g. alums
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
17
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
63
Inorganic compounds
67
Water-insoluble compounds, e.g. fillers, pigments
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
17
Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
63
Inorganic compounds
67
Water-insoluble compounds, e.g. fillers, pigments
68
siliceous, e.g. clays
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
21
Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper impregnating or coating material, characterised by its function, form or properties
06
Paper forming aids
10
Retention agents or drainage improvers
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
23
Processes or apparatus for adding material to the pulp or to the paper
02
characterised by the manner in which substances are added
04
Addition to the pulp; After-treatment of added substances in the pulp
06
Controlling the addition
14
by selecting point of addition or time of contact between components
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
23
Processes or apparatus for adding material to the pulp or to the paper
76
characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
Applicants:
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED [GB/GB]; Cleckheaton Road Low Moor Bradford West Yorkshire BD12 0JZ, GB
Inventors:
CHEN, Gordon, Cheng, I; US
RICHARDSON, Gary, Peter; GB
Priority Data:
60/164,23008.11.1999US
Title (EN) MANUFACTURE OF PAPER AND PAPERBOARD
(FR) FABRICATION DE PAPIER ET DE CARTON
Abstract:
(EN) A process of making paper or paper board comprising forming a cellulosic suspension, flocculating the suspension, draining the suspension on a screen to form a sheet and then drying the sheet, characterised in that the suspension is flocculated using a flocculation system comprising a siliceous material and an anionic branched water soluble polymer that has been formed from water soluble ethylenically unsaturated anionic monomer or monomer blend and branching agent and wherein the polymer has (a) intrinsic viscosity above 1.5 dl/g and/or saline Brookfield viscosity of above about 2.0 mPa.s and (b) rheological oscillation value of tan delta at 0.005 Hz of above 0.7 and/or (c) deionised SLV viscosity number which is at least three times the salted SLV viscosity number of the corresponding unbranched polymer made in the absence of branching agent.
(FR) Ce procédé de fabrication de papier ou de carton comprend les étapes suivantes consistant à former une suspension cellulosique, à faire floculer cette suspension, à égoutter cette suspension sur un tamis de façon à former une feuille, puis à sécher cette feuille. Ce procédé est caractérisé en ce que l'on fait floculer la suspension au moyen d'un système de floculation comprenant un matériau siliceux et un polymère hydrosoluble, ramifié, anionique, que l'on a formé à partir d'un monomère anionique à insaturation éthylénique, hydrosoluble, ou d'un mélange de monomères, et d'un agent de ramification, et en ce que le polymère possède les propriétés suivantes: (a) une viscosité intrinsèque supérieure à 1,5 dl/g et/ou une viscosité Brookfield saline supérieure à 2,0 mPa.s environ, (b) une valeur d'oscillation rhéologique de tangente delta à 0,005 Hz supérieure à 0,7 et/ou une viscosité Brookfield saline, désionisée représentant au moins trois fois la viscosité Brookfield saline, salée, du polymère non ramifié correspondant, effectuée en l'absence de l'agent de ramification.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)