Patent ID: 7544387
Filing Date: 2009-06-09
Classification: C08J,C08K

Abstract:
1. A method for forming a thermoplastic condensation polymer susceptible to molecular weight loss during a heated process, comprising: metering a liquid composition comprising a chain extending agent into a flow restrictor and injecting a gas stream through the flow restrictor to create a zone of turbulence at the outlet of the flow restrictor thereby atomizing the liquid composition and adding a water-bearing particulate material to the zone of turbulence concurrently with metering of the liquid composition and the injection of the gas to mix the particulate material with the atomized liquid composition to form a chain extender composition; introducing the thermoplastic condensation polymer to an extruder; adding to the thermoplastic condensation polymer the chain extender composition; and heat processing the thermoplastic condensation polymer in the extruder, wherein adding the chain extender composition reduces molecular weight loss of the thermoplastic condensation polymer during the heat processing.