Global Patent Index - EP 1023183 A1

EP 1023183 A1 2000-08-02 - CARBONLESS COPY PAPER

Title (en)

CARBONLESS COPY PAPER

Title (de)

KOHLENSTOFFFREIES KOPIERPAPIER

Title (fr)

PAPIER AUTOCOPIANT

Publication

EP 1023183 A1 (EN)

Application

EP 99936777 A

Priority

  • GB 9902436 W
  • GB 9817042 A

Abstract (en)

[origin: WO0007823A1] A coating composition for the preparation of CB coated carbonless copy paper includes a water based dispersion of a sizing agent which is such as to increase the hydrophobicity of the paper substrate. Sizing agents that are suitable include, alkyl ketene dimers and rosin derivatives, and the use of such substances has been found to reduce the measured through-thickness porosity of substrate papers with respect to the solvents employed for the colour-formers, thereby making it possible to utilise grades of paper previously considered unsuitable for use in the manufacture of carbonless copy materials. Alkyl ketene dimers that may be used include those with C12-C22 alkyl radicals, and the rosins which may be used include fortified rosins and modified rosin derivatives.

IPC 1-7 (main, further and additional classification)

B41M 5/124; B41M 5/132

IPC 8 full level (invention and additional information)

B41M 5/124 (2006.01); B41M 5/132 (2006.01)

CPC (invention and additional information)

B41M 5/124 (2013.01); B41M 5/132 (2013.01)

Citation (search report)

See references of WO 0007823A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0007823 A1 20000217; EP 1023183 A1 20000802; GB 9817042 D0 19980930

INPADOC legal status


2002-08-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020212

2001-09-12 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010730

2000-08-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000301

2000-08-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE