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US 10,513,828 B2Granted
Composition for sizing paper
AssigneeKemira Chemie Ges.Mbh
InventorsLeo Schmid, Jürgen Sartori
Life of this patent
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Abstract
A composition for sizing paper includes alkenylsuccinic anhydride (ASA) as the sizing agent and an emulsifier system of anionic emulsifiers and nonionic components, wherein the anionic emulsifiers are chosen from alkali metal salts of aliphatic carboxylic acids or aliphatic dicarboxylic acids and the nonionic components are chosen from polyethylene glycols.
Claims14
A process for the preparation of a composition for sizing paper, the process comprising:
- generating an anionic emulsifier in situ by:
- adding sodium hydroxide or potassium hydroxide to a sizing agent comprising alkenylsuccinic anhydride (ASA) having an alkenyl chain length of 12 to 24 carbon atoms, to form sodium or potassium salts of an alkenylsuccinic acid having an alkenyl chain length of 12 to 24 carbon atoms;
- and
- heating the sodium hydroxide or potassium hydroxide and the sizing agent at a temperature of 100 to 140° C.;
- and
- adding nonionic components of polyethylene glycols (PEG) having an average molecular weight of 200 to 8000 to the anionic emulsifier and dissolving the PEG therein by heating at a temperature of 100 to 140° C., to form the composition.
3 more elements
A process for the preparation of a composition for sizing paper, the process comprising:
- generating an anionic emulsifier in situ by:
- adding sodium hydroxide or potassium hydroxide to a sizing agent comprising alkenylsuccinic anhydride (ASA) having an alkenyl chain length of 17 to 24 carbon atoms, to form sodium or potassium salts of an alkenylsuccinic acid having an alkenyl chain length of 17 to 24 carbon atoms;
- heating the sodium hydroxide or potassium hydroxide and the sizing agent at a temperature of 100 to 140° C.;
- and
- adding nonionic components of polyethylene glycols (PEG) having an average molecular weight of 200 to 8000 to the anionic emulsifier and dissolving the PEG therein by heating at a temperature of 100 to 140° C., to form the composition.
2 more elements
Dependencies are inferred from the claim text.