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US 11,078,341 B2Granted
Thermoplastic polymers
AssigneeColormatrix Europe Limited
InventorsAndrew Overend, Steven John Moloney, Bjorn Klaas, Bo Sjoblom
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Abstract
Thermoplastic polymers, for example fluoropolymers, are foamed by use of a solid formulation comprising thermoplastic polymer and manganese oxalate.
Claims10
A method of preparing a foamed thermoplastic polymer which comprises:
- subjecting a mixture formed by contacting 1 to 36 wt % of a masterbatch with 64 to 99 wt % of a first thermoplastic polymer to be foamed to a temperature of greater than 300° C.,
- wherein the masterbatch is in the form of melt-processed pellets which include 3 to 9 wt % of an oxalate compound, 2 to 10 wt % of a nucleator, and 87 to 95 wt % of a second thermoplastic polymer,
- wherein said second thermoplastic polymer has a melt-processing temperature of at least 250° C. and is a fluoropolymer, and
- wherein said oxalate compound comprises manganese oxalate.
1 more element
Dependencies are inferred from the claim text.