Method for the production of water-in-water polymer dispersions

Details Method for the production of water-in-water polymer dispersions Method for the production of water-in-water polymer dispersions

2008-01-29

2008-01-29

Sanders, Kriellion A (Department: 1714)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S458000, C524S459000, C524S460000, C524S461000

Reexamination Certificate

active

10432624

ABSTRACT:
The invention relates to methods for manufacturing a water-in-water polymer dispersion containing polymer A and at least one polymer dispersant B, according to which monomers, which are dispersed in an aqueous phase containing water-soluble dispersant B, are subjected to radical polymerization, possibly following the addition of a water-soluble salt, and, after polymerisation, a water-soluble acid is added to the water-soluble and/or water-swellable polymer A obtained in this way, where the acid is added in quantities of 0.1 to 5% by weight and the salt in quantities of up to a maximum of 3% by weight, each referred to the total dispersion, and the total quantity of salt and acid amounts to a maximum of 5% by weight, referred to the total dispersion.

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