| (19) |
 |
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(11) |
EP 0 268 880 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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03.05.1989 Bulletin 1989/18 |
| (43) |
Date of publication A2: |
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01.06.1988 Bulletin 1988/22 |
| (22) |
Date of filing: 03.11.1987 |
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| (84) |
Designated Contracting States: |
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AT DE FR GB |
| (30) |
Priority: |
03.11.1986 IT 2221586
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| (71) |
Applicant: LARAC S.p.A. |
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I-21053 Castellanza (Varese) (IT) |
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| (72) |
Inventors: |
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- Pizzigoni, Giuseppe
I-21054 Fagnano Olona
Varese (IT)
- Parrini, Paolo
I-28100 Novara (IT)
|
| (74) |
Representative: Zumstein, Fritz, Dr. et al |
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Patentanwälte,
Dr. F. Zumstein,
Dipl.-Ing. F. Klingseisen,
Bräuhausstrasse 4
80331 München
80331 München (DE) |
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| |
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Remarks: |
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The title of the invention has been amended (Guidelines for Examination in the EPO,
A-III, 7.3). |
|
| (54) |
Cleaning pad for the removal of sulfates from frescoed surfaces |
(57) Flexible coatings for the sulphation-removing cleaning of frescoed surfaces and for
the cleaning thereof from residues of proteinic materials, in particular strengthening
materials, comprising a fibrous support impregnated with a binding agent and with
a mixture based on an anion-exchange material (e.g., an anion-exchange resin) and
an aqueous solution of ammonium carbonate and/or bicarbonate.