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Title: Process of preventing formation of resinous deposits in the manufacture of paper and the like
Abstract:
The difficulties encountered in the manufacture of paper, cardboard, and other cellulosic articles, as they are caused by the formation of resinous or pitch deposits on the paper as well as on the paper machines and processing apparatus, are overcome or at least considerably reduced, by the addition of phosphonic acids and more particularly of alkyl, amino or hydroxy alkyl, or cycloalkyl phosphonic acids or their alkali metal salts and of orthophosphoric acid or its alkali metal salts and/or of polyphosphoric acids. If required, amino polycarboxylic acids, hydroxy carboxylic acids, or their alkali metal salts, or alkali metal polyphosphates are also added during processing.
Other info: Inventors: Hoeger, Ernst (Neuhofen, DT) Scholl, Margarete (Mannheim, DT) Application Number: 551684 Filing Date: 1975-02-21 Publication_date: 1977-03-01 Assignee: Benckiser-Knapsack GmbH (Ladenburg (Neckar), DT) Primary Class(es): 162/76 162/80, 162/158, 162/181.1, 162/181.2, 162/DIG4 Other Classes: US Patent Ref:
Other Refs: Other References: Tappi, vol. 47, No. 1, Jan. 1964, pp. 198A-201A. Tappi, vol. 39, No. 10, Oct. 1956, pp. 684-690. | |