Alkenyl succinic anhydride emulsion
AssigneeBercen Incorporated
InventorsKoyu Nikoloff, Edward Takacs
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Abstract
In sizing paper and paperboard with an aqueous ASA sizing system, a dispersal is formed comprising an ASA, a water-immiscible carrier, and a cationic water-soluble dispersing agent and when desired, a non-ionic surfactant. The dispersal can be shipped and stored for a prolonged time until use. The dispersal is added to water to form an oil-in-water sizing emulsion. This prepared emulsion is suitable for sizing paper and paperboard directly without the need for additional emulsifying agents or expensive equipment.
Claims24
A method for forming a dispersal product comprising alkenyl succinic anhydride and a cationic water-soluble polyacrylamide dispersing agent in a water-immiscible hydrocarbon carrier, said dispersal product being suitable for addition to water to yield an oil-in-water sizing emulsion, said method comprising:
- first providing said cationic water-soluble polyacrylamide dispersing agent in a mixture of water and said water-immiscible hydrocarbon carrier;
- then removing the water until said mixture contains less than 0.3% water, by weight,
- and finally adding sufficient alkenyl succinic anhydride to form said dispersal product, so that said dispersal product has no more than a trace of water.
A method of preparing a mixture for sizing paper or paper products with alkenyl succinic anhydride comprising:
- first forming a dispersal product comprising alkenyl succinic anhydride, a water-immiscible hydrocarbon carrier, and cationic water-soluble polyacrylamide dispersing agent, the dispersal product comprising no more than a trace of water;
- and then adding said dispersal product to water to form an oil-in-water ASA sizing emulsion.
An alkenyl succinic anhydride dispersal product comprising an ASA, a water-immiscible hydrocarbon carrier, a cationic polyacrylamide water-soluble dispersing agent, and no more than a trace of water.
Dependencies are inferred from the claim text.