Method for the manufacture of polymer products from cyclic ester

Details Method for the manufacture of polymer products from cyclic ester Method for the manufacture of polymer products from cyclic ester

1991-07-18

1993-07-06

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264257, 264258, 264314, 2643286, 26433121, 26432817, 528357, B29C 4500

Patent

active

052251292

ABSTRACT:
A method for the manufacture of polymer products from cyclic esters, according to which a catalyst and cyclic monomers are mixed in a mixing chamber and are optionally brought to a higher temperature, after which the mixture is injected, under pressure, into a cavity of a mold consisting of at least two parts and the mold is heated for some time at a temperature above the melting temperature of the monomers, after which the mold is opened and the product is removed from the mold. Polymer products manufactured by this method can be used in medical fields and particularly in reconstructive orthopedics.

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Kubiak et al., The Development of Non-Urethane Materials for the RIM Process, 45th Annual Technical Conference, Reinforced Plastics/Composites Institute, The Society of the Plastics Industry, Inc. 1980 pp. 1-7.
J. C. O'Brien et al, Transfer Molding, Modern Plastics Encyclopedia 1988, pp. 299-300.

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