EP 0133699 A3 19850403 - COMPOSITIONS FOR IMPARTING TEMPORARY WET STRENGTH TO PAPER
Title (en)
COMPOSITIONS FOR IMPARTING TEMPORARY WET STRENGTH TO PAPER
Publication
Application
Priority
US 52391283 A 19830816
Abstract (en)
[origin: EP0133699A2] 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.
IPC 1-7
IPC 8 full level
D21H 17/39 (2006.01); D21H 21/20 (2006.01)
CPC (source: EP KR)
D21H 17/39 (2013.01 - EP KR); D21H 17/64 (2013.01 - KR); D21H 17/65 (2013.01 - KR); D21H 21/20 (2013.01 - KR); D21H 21/20 (2013.01 - EP)
Citation (search report)
- [X] US RE30259 E 19800422
- [AD] US 3556932 A 19710119 - COSCIA ANTHONY THOMAS, et al
- [A] US 3597313 A 19710803 - WILLIAMS LAURENCE LYMAN, et al
- [A] US 3842054 A 19741015 - KEIM G
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0133699 A2 19850306; EP 0133699 A3 19850403; AU 3192184 A 19850221; KR 850001819 A 19850401
DOCDB simple family (application)
EP 84109360 A 19840807; AU 3192184 A 19840815; KR 840004888 A 19840814