Composition for increasing wet strength of paper including...

Details Composition for increasing wet strength of paper including... Composition for increasing wet strength of paper including...

2006-03-07

2006-03-07

Fortuna, José A. (Department: 1731)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S165000, C162S158000, C162S179000, C528S045000, C524S589000, C524S590000, C524S591000

Reexamination Certificate

active

07008508

ABSTRACT:
For use as a wet strength agent, a water-soluble blocked urethane prepolymer having a hydrophilic group and a blocked isocyanate group is combined with a cationic charge-adjusting agent. The adsorption and retention of the water-soluble blocked urethane prepolymer to cellulosic fiber are promoted by virtue of the cationic charge adjusting agent when the wet strength agent is added to a paper-making stock.

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