Global Patent Index - EP 2024564 A1

EP 2024564 A1 2009-02-18 - SIZING OF PAPER

Title (en)

SIZING OF PAPER

Title (de)

VERFAHREN ZUM LEIMEN VON PAPIER

Title (fr)

COLLAGE DE PAPIER

Publication

EP 2024564 A1 (EN)

Application

EP 07748534 A

Priority

  • SE 2007050373 W
  • EP 06114821 A
  • EP 07748534 A

Abstract (en)

[origin: WO2007139500A1] The present invention relates to a process for the production of paper which comprises: (a) providing an aqueous cellulosic suspension; (b) separately adding to the suspension: (i) a nitrogen-containing organic compound having a molecular weight less than 1,000; and (ii) a cellulose-reactive sizing agent; and (c) dewatering the obtained suspension to form paper. The invention further relates to a process in which a nitrogen-containing organic compound having a molecular weight less than 1,000 is mixed with an aqueous dispersion of a cellulose-reactive sizing agent to form a pre-mix and which premix is added to the suspension.

IPC 8 full level (invention and additional information)

D21H 21/06 (2006.01); D21H 17/07 (2006.01); D21H 17/45 (2006.01); D21H 17/56 (2006.01); D21H 17/68 (2006.01); D21H 21/16 (2006.01); D21H 23/04 (2006.01); D21H 23/76 (2006.01)

CPC (invention and additional information)

D21H 21/16 (2013.01); D21H 17/07 (2013.01); D21H 17/17 (2013.01); D21H 17/455 (2013.01); D21H 23/04 (2013.01); D21H 23/765 (2013.01)

Citation (search report)

See references of WO 2007139500A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

EPO simple patent family

WO 2007139500 A1 20071206; AU 2007268301 A1 20071206; BR PI0712698 A2 20120703; CA 2653791 A1 20071206; CN 101460680 A 20090617; EP 2024564 A1 20090218; JP 2009538998 A 20091112; KR 20090023579 A 20090305; RU 2008152816 A 20100720

INPADOC legal status


2012-01-25 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20110806

2011-04-20 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20110316

2009-02-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20081023

2009-02-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

2009-02-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL BA HR MK RS