| (19) |
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(11) |
EP 0 151 994 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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27.11.1985 Bulletin 1985/48 |
| (43) |
Date of publication A2: |
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21.08.1985 Bulletin 1985/34 |
| (22) |
Date of filing: 25.01.1985 |
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| (84) |
Designated Contracting States: |
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AT BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
27.01.1984 US 574324
25.06.1984 US 625476
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| (71) |
Applicant: NALCO CHEMICAL COMPANY |
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() |
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| (72) |
Inventors: |
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- Rende, Dominic S.
()
- Breslin, Michael D.
()
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| |
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| (54) |
Method of preparing an improved sizing agent and novel paper sizing method |
(57) Cationically charged water soluble vinyl addition polym- mers provide improved emulsification
of alkenyl succinic anhydride sizing agents. Sized paper products prepared from alkenyl
succinic anhydride emulsions made with the polymers have superior ink holdout and
strenghth.