Process and compositions for sizing paper

Details Process and compositions for sizing paper Process and compositions for sizing paper

1987-02-04

1989-08-22

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524112, C08J 300

Patent

active

048597201

ABSTRACT:
A concentrate composition, that can be diluted with water to form an aqueous size for cellulosic fibres, comprises a substantially anhydrous dispersion of polyelectrolyte particles in a non-aqueous liquid comprising a reactive size, and is made by forming a dispersion in a hydrophobic liquid of the polyelectrolyte particles while they are swollen by water, azeotroping the dispersion and adding the size to the hydrophoboic liquid. If the size is a liquid size, the hydrophobic liquid may be removed from the composition. The dispersion of swollen polyelectrolyte particles in the hydrophobic liquid can be amde by dispersing a solution of polyelectrolyte in the liquid but is preferably made by reverse phase polymerization.

REFERENCES:
patent: 4207142 (1980-06-01), Shepherd
patent: 4214948 (1980-07-01), Mazzarella et al.
patent: 4279794 (1981-07-01), Dumas
patent: 4431826 (1984-02-01), Sweeney
patent: 4514229 (1985-04-01), Sato et al.
patent: 4545855 (1985-10-01), Sweeney
patent: 4645568 (1987-02-01), Kurps et al.

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