C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/9319
C08L 33/24 (2006.01) C08F 8/12 (2006.01) D21H 17/37 (2006.01)
Patent
CA 2004144
o.z. 0050/40418 Abstract of the Disclosure: Stable water-in-oil emul- sions of hydrolyzed polymers of N-vinylamides of the formula Image (I) where R and R1 are each H or C1-C6-alkyl are prepared by polymerization of a compound of the formula I alone or as a mixture with other monoethylenically unsaturated monomers, in the form of a water-in-oil emulsion, to give a water-in-oil polymer emulsion, and subsequent hydroly- sis of the polymer, by a process in which hydrolysis of the polymer in the form of the water-in-oil polymer emulsion is carried out in the presence of an acid or base and of from 1 to 30% by weight, based on the poly- mer, of an emulsifier which is obtainable by (A) reacting a C10-C22-fatty alcohol with epichlorohydrin in a molar ratio of from 1 : 0.5 to 1 : 1.5 to give a glycidyl ether, (B) reacting the glycidyl ether with (1) a saturated C2- C6-alcohol containing from 2 to 6 OH groups or (2) its monoether with a C10-C22-fatty alcohol, in a molar ratio of glycidyl ether to (1) or (2) of from 1 : 0.5 to 1 : 6, in the presence of an acid or base, and (C) alkoxylating the reaction product from (B) with one or more C2-C4-alkylene oxides in a molar ratio of from 1 : 1 to 1 : 6. The polymer emulsions obtainable in this manner are used as drainage aids, retention aids and flocculants in the making of paper and paper products.
Denzinger Walter
Freudenberg Enrique
Hartmann Heinrich
Kroener Michael
Sendhoff Norbert
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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