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US 9,315,644 B2Granted
Cured perfluoroelastomer article
AssigneeE. I. Du Pont de Nemours and Company
InventorShuhong Wang
Life of this patent
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Abstract
Cured perfluoroelastomers that contain high levels (i.e. greater than 50 phr) BaSO4 exhibit good thermal sealing performance such as reduced sticking and reduced tendency for splitting.
Claims4
A cured perfluoroelastomer article comprising
- A) a perfluoroelastomer comprising copolymerized units of:
- i) 15 to 60 mole percent perfluoro(alkyl vinyl ether),
- ii) 0.1 to 5 mole percent of a cure site monomer having nitrile groups, and
- iii) the remaining copolymerized units being of tetrafluoroethylene so that total mole percent of i+ii+iii is 100;
- and
- B) greater than 60 parts by weight of BaSO4 per hundred parts by weight perfluoroelastomer.
3 more elements
Dependencies are inferred from the claim text.