Fluidizing agent and method using said agent
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United States of America Patent
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Mar 22, 2016
Grant Date -
Feb 19, 2015
app pub date -
Mar 22, 2013
filing date -
Mar 26, 2012
priority date (Note) -
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Abstract
The present disclosure relates to a compound U comprising at least one urethane functional group, and its use as a fluidizing agent or fluidizing agent precursor in a process for preparing a polyamide article. The process comprises heating a composition comprising at least one polyamide PA and at least one compound U comprising at least one urethane functional group, at a temperature T, for a time t and at a pressure P, wherein the temperature T and the time t are such that CO2 is generated and the melt viscosity of the composition is decreased, in comparison with the melt viscosity of the composition without compound U, and recovering the article. The fluidizing agent can further enable the production of an article that has an unreduced density and/or in which the mean molar mass of the polymers of the composition is increased.
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