Preparation of solution of high molecular weight polymers

Details Preparation of solution of high molecular weight polymers Preparation of solution of high molecular weight polymers

1986-08-11

1988-11-15

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Miscellaneous

2641761, 26421121, 26421122, 26421123, 366 76, 523322, B29C 4710, B29C 4736

Patent

active

047848200

ABSTRACT:
Solutions of high molecular weight polymers, such as ultrahigh molecular weight polyolefins are prepared, by forming a slurry of particles of the polymer in a solvent for the polymer, then transferring the slurry to a pumping device, then pumping the slurry under pressure to insure positive displacement to a screw extruder, and maintaining the slurry in the screw extruder for sufficient residence time at sufficient temperature so that a homogeneous solution is formed, then conveying the solution with the screw extruder to metering device which can feed a spinnerette, or a film-forming or tape-forming slit extruder.

REFERENCES:
patent: 3415925 (1968-12-01), Marans
patent: 3923947 (1975-12-01), Cook
patent: 4130618 (1978-12-01), Hill
patent: 4344908 (1982-08-01), Smith et al.
patent: 4430383 (1984-02-01), Smith et al.
patent: 4440711 (1984-04-01), Kwon et al.
patent: 4545950 (1985-10-01), Motooka et al.
patent: 4551296 (1985-11-01), Kavesh et al.
patent: 4668717 (1987-05-01), Lemstra et al.

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