Preparation of high molecular weight polymers
DC CAFCFirst Claim
1. A process for preparing high molecular weight polymers, which comprises polymerizing water-soluble, monoethylenically unsaturated monomers and, if desired, crosslinkers which contain at least two nonconjugated, ethylenically unsaturated double bonds in the molecule, and, if desired, water-insoluble monoethylenically unsaturated monomers in aqueous solution in the presence of polymerization initiators in a tubular reactor which has a conical taper at the end, the ratio of the diameter of the reactor (D1) to the diameter at the end of the conical taper of the reactor (D2) being from 2:
- 1 to 25;
1 and the angle between D1 at the start of the conical taper and the inner cone wall being >
45° and
<
90°
, and removing the gelatinous reaction mixture by injection of an inert gas.
4 Assignments
Litigations
1 Petition
Accused Products
Abstract
Process for the preparing high molecular weight polymers by polymerization of water-soluble, monoethylenically unsaturated moonomers and, if desired, crosslinkers, and, if desired, water-insoluble monoethylenically unsaturated monomers, in aqueous solution in the presence of polymerization initiators in a tubular reaction which at the end has a conical taper, the ratio of the diameter of the reactor (D1) to the diameter at the end of the conical taper of the reactor (D2) being from 2:1 to 25:1 and the angle between D1 at the beginning of the conical taper and the inner cone wall being >45° and <90°, and discharge of the gelatinous reaction mixture from the reactor by injection of an inert gas.
17 Citations
7 Claims
-
1. A process for preparing high molecular weight polymers, which comprises polymerizing water-soluble, monoethylenically unsaturated monomers and, if desired, crosslinkers which contain at least two nonconjugated, ethylenically unsaturated double bonds in the molecule, and, if desired, water-insoluble monoethylenically unsaturated monomers in aqueous solution in the presence of polymerization initiators in a tubular reactor which has a conical taper at the end, the ratio of the diameter of the reactor (D1) to the diameter at the end of the conical taper of the reactor (D2) being from 2:
- 1 to 25;
1 and the angle between D1 at the start of the conical taper and the inner cone wall being >
45° and
<
90°
, and removing the gelatinous reaction mixture by injection of an inert gas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- 1 to 25;
Specification