Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Patent
1990-08-09
1991-02-26
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
162DIG4, D21F 132, D21H 2102
Patent
active
049959441
ABSTRACT:
A method is disclosed for treating papermill felts to inhibit the deposit of sticky material thereon. The method comprises applying an aqueous solution which contains at least about 2 ppm of a cationic polymer; which contains a water soluble cationic surfactant; the surfactant being applied in an amount effective to inhibit build-up of deposits derived from the cationic polymer. Cationic surfactants are preferred. Particular use is disclosed of water soluble surfactants which have a molecular weight between about 200 and 800 and having the general formula: ##STR1## wherein each R is independently selected from the group consisting of hydrogen, polyethylene oxide groups, polypropylene oxide groups, alkyl groups having between about 1 and 22 carbon atoms, aryl groups, and aralkyl groups, at least one of said R groups being an alkyl group having at least about 8 carbon atoms, and wherein X.sup.- is an anion, or 1
of an n-valent anion. Compositions comprising said cationic polymers and said surfactants in a weight ratio of surfactant to cationic polymer of from about 50:1 to about 1:1 are disclosed as particularly useful for treating felts.
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Aston David A.
Paul Stewart N.
Barr James P.
Dearborn Chemical Company Ltd.
Hastings Karen M.
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