Process for the continuous manufacture of poly-.epsilon.-caprola

Details Process for the continuous manufacture of poly-.epsilon.-caprola Process for the continuous manufacture of poly-.epsilon.-caprola

1996-03-29

1997-08-12

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528354, 528361, 524765, C08G 6308

Patent

active

056567189

ABSTRACT:
Poly-.epsilon.-caprolactones are produced by continuous polymerization of .epsilon.-caprolactone as a melt in an extruder (reactive extrusion) with the use, as polymerization initiator, of aluminium trialkoxides in which at least one alkoxy radical includes at least one other oxygen atom besides the oxygen atom constituting the aluminoxane (AI--O) bond. This oxygen atom is advantageously present in the form of an ester or ether functional group. These initiators are generally in the liquid state at ambient temperature and are furthermore miscible with .epsilon.-caprolactone, with the result that they can be used in the absence of solvent. The appropriate adjustment of the feed flow rates of .epsilon.-caprolactone and of initiator to the extruder permits the manufacture of custom-made poly-.epsilon.-caprolactones which have predesigned weight-average molecular masses.

REFERENCES:
patent: 5468837 (1995-11-01), Wautier

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