Continuous free radial polymerization in a wiped-surface reactor

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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526328, C08F 202

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active

046199799

ABSTRACT:
A bulk polymerization process for free radical polymerization of vinyl monomers in a wiped surface reactor is disclosed. Referring to FIG. 1; monomer streams 5 (after purification and silica gel column 2) and 7 are combined with free radical initiator 9 to form a premix 16. Pump 18 transfers the premix stream 22 through static mixer 24 into a wiped surface reactor 27. The reactor can be a counter rotating twin screw extruder which produces polymer stream 36 without the need of solvent and using residence times much shorter than prior art solution or emulsion processes.
Some unique pressure sensitive adhesive acrylate polymers have been produced. They are believed to have a relatively high degree of branching. The bulk polymerization process permits the manufacture of pressure sensitive adhesive articles by extruding directly from the twin screw extruder onto a substrate.

REFERENCES:
patent: Re24906 (1960-12-01), Ulrich
patent: 2530409 (1950-11-01), Strober et al.
patent: 2745824 (1956-05-01), Melchore
patent: 2973286 (1961-02-01), Ulrich
patent: 3141868 (1964-07-01), Fivel
patent: 3234303 (1966-02-01), Bild et al.
patent: 3522214 (1970-07-01), Crawford et al.
patent: 3725115 (1973-04-01), Christenson et al.
patent: 3753958 (1973-08-01), Winlger et al.
patent: 3786116 (1974-01-01), Milkovich et al.
patent: 3821330 (1974-06-01), Free
patent: 3920619 (1975-11-01), Kameda
patent: 3963679 (1976-06-01), Ullrich et al.
patent: 4042768 (1977-08-01), Muller et al.
patent: 4125696 (1978-01-01), Kenneth
patent: 4137389 (1979-01-01), Wingler
patent: 4181752 (1980-01-01), Martens et al.
patent: 4246382 (1981-01-01), Honda
patent: 4276432 (1981-06-01), Rhum
patent: 4304705 (1981-12-01), Heilmann et al.
patent: 4487897 (1984-12-01), Matsuoka et al.
patent: 4505972 (1985-03-01), Moore
patent: 4529787 (1985-07-01), Schmidt
Tadmor, Z., "Continuous Polymerization in Extruder Reactor" Polymer Letters Edition (1973).
Ehehalt, W. J. "Continuous Production of Hot Melt Adhesives", Adhesives Age, Aug., 1975.
Thiele, W., "Introducing Counter-Rotating Intermeshing Twin-Screw Dispersion Compounders and Reactors" American Leistritz Extruder Corporation, May 27, 1980.
Mack, W. A., "Bulk Polymerization in Screw-Conveyer Reactors", Chemical Engineering, May 15, 1972.
Mack, W. A. "Use of Screw Machinery for Continuous Polymerization and Polycondensation Reactions", Polym. Prepr. Am. Chem. Soc. (1972).
Levy, S., "Plastics Extrusion Technology Handbook" Industrial Press Inc., 1981.
Rauwendal, C. J. "Analysis and Experimental Evaluation of Twin Screw Extruders" Polymer Engineering and Science, Nov., 1981

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