Preparation of high molecular weight polymers

CAFC
  • US 5,633,329 A
  • Filed: 01/25/1996
  • Issued: 05/27/1997
  • Est. Priority Date: 01/31/1995
  • Status: Expired due to Term
First Claim
Patent Images

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.

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