Plasticized fluoropolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsCharles W. Stewart, Peter D. Spohn
Life of this patent
Estimating the term…
Abstract
Fluoroelastomers and fluoroplastics are plasticized with high-boiling fluorinated aliphatic cyclic structures to enhance processibility or to improve final properties.
Claims20
A plasticized fluoropolymer composition for fabrication into an article, comprising a fluoropolymer derived from at least one monomer selected from the group consisting of fluoroolefins and fluorinated vinyl ethers of the formula CY.sub.2 .dbd.CYOR or CY.sub.2 .dbd.CYOR'OR, where Y is H or F, and --R and --R'-- are independently completely-fluorinated or partially-fluorinated alkyl and alkylene groups containing 1-8 carbon atoms, said fluoropolymer plasticized with about 2-400 phr of high-boiling, highly-fluorinated, polycyclic alkane for fabrication into an article, said composition being dimensionally stable at room temperature and substantially void-free.
A fabricated article comprising a plasticized fluoropolymer composition, comprising a fluoropolymer derived from at least one monomer selected from the group consisting of fluoroolefins and fluorinated vinyl ethers of the formula CY.sub.2 .dbd.CYOR or CY.sub.2 .dbd.CYOR'OR, where Y is H or F, and --R and --R'-- are independently completely-fluorinated or partially-fluorinated alkyl and alkylene groups containing 1-8 carbon atoms, said fluoropolymer plasticized with about 2-400 phr of high-boiling, highly-fluorinated, polycyclic alkane, said boiling point being at least about 280.degree. C. and said degree of fluorination being a F/H ratio of at least 100, said composition being dimensionally stable at room temperature and substantially void-free.
Process for bonding at least two fluoropolymer surfaces of at least one article together, comprising interposing a plasticized fluoropolymer composition comprising a fluoropolymer derived from at least one monomer selected from the group consisting of fluoroolefins and fluorinated vinyl ethers of the formula CY.sub.2 .dbd.CYOR or CY.sub.2 .dbd.CYOR'OR, where Y is H or F, and --R and --R'-- are independently completely-fluorinated or partially-fluorinated alkyl and alkylene groups containing 1-8 carbon atoms, said fluoropolymer plasticized with about 2-400 phr of high-boiling, highly fluorinated, polycyclic alkane, said boiling point being at least about 280.degree. C. and said degree of fluorination being a F/H ratio of at least 100 between and in contact with said two surfaces, the fluoropolymer of said composition being the same or different from the fluoropolymer of said surfaces, heating said composition to bond said surfaces one to the other through said composition without appreciable permanent deformation of said article.
A process comprising preparing a composition comprising unsintered polytetrafluoroethylene fine powder with an amount of high-boiling, highly-fluorinated, polycyclic alkane, said boiling point being at least about 280.degree. C. and said degree of fluorination being a F/H ratio of at least 100 effective to render said polytetrafluoroethylene fine powder paste extrudable, and paste extruding said composition.
A process comprising preparing a composition comprising unsintered polytetrafluoroethylene granular resin with an amount of high-boiling, highly-fluorinated, polycyclic alkane said boiling point being at least about 280.degree. C. and said degree of fluorination being a F/H ratio of at least 100 effective to facilitate ram extrusion of said resin, and ram extruding said composition.
Dependencies are inferred from the claim text.