Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2005-10-17
2010-06-08
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S168300, C162S158000, C162S184000, C162S231000, C252S301230, C252S301210
Reexamination Certificate
active
07731820
ABSTRACT:
The invention relates to a composition comprising a) at least one water-soluble fluorescent whitening agent, b) a polymer formed from an ethylenically unsaturated monomer or monomer blend, characterized in that at least one monomer is acrylamide and the water-soluble polymer has an average (weight average) molecular weight of between 500 and 49,000, optionally, c) polyethylene glycol with a weight average molecular weight of between 500 and 6000 and d) water and the use of the composition for the fluorescent whitening of paper in coating and size press or film press applications.
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Cockcroft Robert
Deisenroth Ted
Rohringer Peter
Steffen Winfried
Ciba Specialty Chemicals Corporation
Cordray Dennis
Hug Eric
Loggins Shiela A.
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