Claims
- 1. A process for the preparation of a finely divided, water-soluble polymer comprising, polymerizing an aqueous solution in not less than 20% strength by weight of water-soluble, monoethylenically unsaturated monomers in the presence of a free radical initiator in a kneader with formation of a finely divided, water-soluble polymer gel, wherein from 0.1 to 10% by weight, based on the total monomers, of a surfactant is used in the polymerization, initially polymerizing said aqueous solution to a conversion of the monomers of not less than 60% in the absence of surfactants or in the presence of not more than 50% of the total amount of surfactant, and then adding the remaining amount of surfactant to the reaction mixture and completing the polymerization.
- 2. A process as claimed in claim 1, wherein the monomers are first polymerized in the absence of a surfactant to a conversion of not less than 80%, and the total amount of surfactant is then added.
- 3. A process as claimed in claim 1, wherein a mixture of
- a) water-soluble, monoethylenically unsaturated monomers and
- b) not more than 20 mol %, based on the monomers (a), of water-insoluble, monoethylenically unsaturated monomers is polymerized.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4007313 |
Mar 1990 |
DEX |
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Parent Case Info
This is a continuation-in-part application of Ser. No. 07/438,876 filed Nov. 20, 1989, now U.S. Pat. No. 5,149,750, granted Sep. 22, 1992.
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
438876 |
Nov 1989 |
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