Aqueous dispersions, a process for their preparation and the use of the dispersions as sizing agents
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United States of America Patent
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May 10, 1988
Grant Date -
N/A
app pub date -
Jul 2, 1986
filing date -
Jul 10, 1985
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Expired
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Abstract
Aqueous cationic or anionic dispersions of rosin and certain synthetic sizing agents, carbamoyl chlorides, ketene dimers or acid anhydrides. The particles in the dispersed phase contain a mixture of rosin and synthetic sizing agent and the dispersions are prepared by homogenisation of a homogeneous mixture of the rosin material and the synthetic sizing agent in the presence of a dispersing agent. The dispersions are used as sizing agents in the production of paper, paper board, board and similar products.
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