Radically coupled PTFE polymer compounds and method for the production thereof
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United States of America Patent
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Jul 20, 2010
Grant Date -
Apr 23, 2009
app pub date -
Oct 22, 2004
filing date -
Oct 30, 2003
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Abstract
Radically coupled PTFE polymer compounds useful, for example, as tribo materials, and a method for the production thereof. Radically coupled PTFE polymer compounds are provided which exhibit improved wear resistances with comparable gliding properties, and furthermore there is provided a simple and efficient method for the production of such compounds. Radically coupled PTFE polymer compounds are provided comprising radiation-chemically and/or plasma-chemically modified PTFE powders, on the particle surface of which olefinically unsaturated polymers are chemically radically coupled by a reactive conversion into a melt. There is also provided a method for producing radically coupled PTFE polymer compounds, in which PTFE powders are reactively converted with reactive perfluoroalkyl-(peroxy) radical centers after a radiation-chemical and/or plasma-chemical modification into a melt with the addition of olefinically unsaturated polymers.
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