Additive composition for paper making

Details Additive composition for paper making Additive composition for paper making

2006-05-16

2006-05-16

Nutter, Nathan M. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S500000, C524S502000, C524S508000

Reexamination Certificate

active

07045563

ABSTRACT:
The object of the present invention is an additive composition for paper making which is added to the pulp prior to web formation in order to increase the wet strength of the web. The basic component of the composition is a component made from starch, which to its molecular weight has been thinned to a viscosity level of 10 to 400 (5%, 60° C., Brookfield) which by solution cationizing using a quaternary nitrogen compound is cationized to a charge of <4 mEkv/g, the composition containing at least one additional component selected from1) a starch-based polymer dispersion which contains starch and a monomeric graft copolymer, providing a polymer having a film formation temperature of −50 to 200° C., and2) polyamide epichlorhydrin resin (PAAE).

REFERENCES:
patent: 6398912 (2002-06-01), Vihervaara et al.
patent: 6753377 (2004-06-01), Niinikoski et al.
patent: 990229 (1999-02-01), None
patent: WO 00/46264 (2000-08-01), None

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