(19)
(11) EP 0 133 699 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.04.1985 Bulletin 1985/14

(43) Date of publication A2:
06.03.1985 Bulletin 1985/10

(21) Application number: 84109360

(22) Date of filing: 07.08.1984
(84) Designated Contracting States:
AT BE DE FR GB IT NL SE

(30) Priority: 16.08.1983 US 523912

(71) Applicant: AMERICAN CYANAMID COMPANY
 ()

(72) Inventors:
  • Guerro, Gerald Joseph
     ()
  • Proverb, Robert Joseph
     ()
  • Tarvin, Robert Floyd
     ()

   


(54) Compositions for imparting temporary wet strength to paper


(57) A composition for imparting temporary wet strength to paper comprising a solution containing from about one percent to about ten percent by weight of a vinylamide polymer having sufficient glyoxal-reactive amide substituents and -CHOHCHO substituents to be thermosetting, in a solvent selected from the group consisting of water, water-miscible solvents containing free hydroxyl functionality, and mixtures thereof, to which solution has been added a sufficient quantity of a strong base for reaction therewith to adjust the pH of the aqueous solution to a value of from about 8.5 to about 11. Also disclosed is a process for imparting temporary wet strength to paper by application thereto of a wet strengtheningly effective amount of such aqueous composition, and the paper product of such process.





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