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1. (WO1998049397) PROCESS FOR SURFACE SIZING PAPER AND PAPER PREPARED THEREBY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/049397 International Application No.: PCT/US1998/006472
Publication Date: 05.11.1998 International Filing Date: 31.03.1998
IPC:
B41M 5/00 (2006.01) ,D21H 17/28 (2006.01) ,D21H 17/43 (2006.01) ,D21H 21/16 (2006.01) ,G03G 7/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
41
PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
M
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
5
Duplicating or marking methods; Sheet materials for use therein
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
21
of natural origin; Derivatives thereof
24
Polysaccharides
28
Starch
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
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
14
characterised by function or properties in or on the paper
16
Sizing or water-repelling agents
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
7
Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
Applicants:
HERCULES INCORPORATED [US/US]; Intellectual Property Section 8th floor 1313 North Market Street Wilmington, DE 19894-0001, US
Inventors:
VARNELL, Daniel, Felix; US
Agent:
SLOAN, Martin, F.; Hercules Incorporated Intellectual Property Section 8th floor 1313 North Market Street Wilmington, DE 19894-0001, US
Priority Data:
08/847,84128.04.1997US
Title (EN) PROCESS FOR SURFACE SIZING PAPER AND PAPER PREPARED THEREBY
(FR) PROCEDE POUR COLLAGE DU PAPIER EN SURFACE ET PAPIER AINSI TRAITE
Abstract:
(EN) A process for preparing sized paper which incorporates in the paper a size composition containing polymer latex, wherein the polymer contained in the polymer latex is anionic polymer having properties selected from the group consisting of TG about - 15 °C to about 50 °C and acid number about 30 to about 100, and wherein the polymer latex has a zeta potential of from about - 25 to about - 70 millivolts over the pH range of about 5 to about 9. A preferred process has the steps: a) providing an aqueous pulp suspension; b) sheeting and drying the aqueous pulp suspension to obtain paper; c) treating the paper by applying to at least one surface of it the size composition containing polymer latex and starch; and d) drying the paper to obtain sized paper. Preferred anionic polymers are copolymers of monomers comprising styrene or substituted styrene, alkyl acrylate or methacrylate and ethylenically unsaturated carboxylic acid.
(FR) L'invention concerne un procédé de préparation de papier collé visant à incorporer au papier une composition de collage à base de latex en matériau polymère, ce matériau étant un polymère anionique dont les propriétés sont choisies comme suit : TG d'environ -15 °C à environ 50 °C et indice d'acide d'environ 30 à environ 100. Le latex en question a un potentiel d'ionisation compris entre environ -25 et environ -70 millivolts sur une gamme de pH allant d'environ 5 à environ 9. En mode de réalisation préféré, le procédé comprend les étapes suivantes : a) présence d'une suspension de pâte aqueuse; b) mise en feuille et séchage de ladite suspension pour obtenir du papier; c) traitement du papier par application sur au moins une surface de la composition de collage à base du latex considéré et d'amidon; et d) séchage du papier pour obtenir le papier collé. De préférence, les polymères anioniques sont des copolymères de monomères renfermant les constituants suivants: styrène ou styrène substitué, acrylate ou méthacrylate d'alkyle et acide carboxylique éthyléniquement insaturé.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0909355CN1231008CA2261602NZ333948AU1998068774