Modified vinylamine/vinylformamide polymers for use as creping adhesives
AssigneeNalco Company
InventorsVladimir A. Grigoriev, Gary S. Furman, Mingli Wei, Winston Su, Christopher D. Kaley
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Abstract
This invention is method of creping a paper web comprising a) applying to a rotating creping cylinder an adhesive composition having a pH of about 6.5 to about 8 and comprising one or more vinylamine/N-vinyl formamide polymers composed of about 10 to about 99 mole percent vinylamine monomer and about 90 to about 1 mole percent N-vinylformamide monomer; b) pressing the paper web against the creping cylinder to effect adhesion of the paper web to the creping cylinder; and c) dislodging the paper web from the creping cylinder with a doctor blade.
Claims17
A method of creping a paper web comprising:
- a) preparing an adhesive composition having a pH of about 7 to about 7.5 and comprising one or more vinylamine/N-vinyl formamide polymers composed of about 10 to about 99 mole percent vinylamine monomer and about 90 to about 1 mole percent N-vinyl formamide monomer;
- b) modifying the vinylamine/N-vinyl formamide polymers by reaction with a halogenated organic acid;
- c) after modifying the vinylamine/N-vinyl formamide polymers, applying the adhesive composition to a rotating creping cylinder d) pressing the paper web against the creping cylinder to effect adhesion of the paper web to the creping cylinder;
- and
- e) dislodging the paper web from the creping cylinder with a doctor blade;
- wherein the vinylamine/N-vinyl formamide polymers are reacted with a crosslinker before it is modified with the organic acid, and wherein the halogenated acid is chloroacetic acid in an amount of between about 10 weight percent to about 15 weight percent based on polymer actives.
Dependencies are inferred from the claim text.