| (19) |
 |
|
(11) |
EP 0 343 007 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
27.02.1991 Bulletin 1991/09 |
| (43) |
Date of publication A2: |
|
23.11.1989 Bulletin 1989/47 |
| (22) |
Date of filing: 19.05.1989 |
|
| (51) |
International Patent Classification (IPC)4: D21H 19/44 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL SE |
| (30) |
Priority: |
20.05.1988 JP 123387/88
|
| (71) |
Applicant: SOMAR CORPORATION |
|
Tokyo 104 (JP) |
|
| (72) |
Inventors: |
|
- Mitsui, Susumu
Koshigaya-shi
Saitama-ken (JP)
- Tsunekawa, Kenji
Soka-shi
Saitama-ken (JP)
|
| (74) |
Representative: Wallace, Sheila Jane et al |
|
Lloyd Wise, Tregear & Co.,
Commonwealth House,
1-19 New Oxford Street
London WC1A 1LW
London WC1A 1LW (GB) |
|
| |
|
| (54) |
Paper coating composition |
(57) An aqueous coating composition useful for the production of a coated paper is disclosed
which includes
a white pigment,
a binder, and
an additive which is an acrylic acid/methacrylic acid copolymer and/or a copolymer
of the following two monomers:
(a) an unsaturated acid of the formula:
CH₂ = CR¹COOH
wherein R¹ stands for hydrogen or a methyl group, and
(b) an unsaturated ester of the formula
CH₂ = CR²COOR³
wherein R² stands for hydrogen or a methyl group and R³ stands for an alkyl group
having 2-4 carbon atoms, the amount of the additive being 0.001-2 % based on the weight
of the white pigment.