Fluoropolymer composition

Patent metadata

Field	Value
Publication number	US-9458314-B2
Application number	US-201314378814-A
Country	US
Kind code	B2
Filing date	Feb 14, 2013
Priority date	Feb 15, 2012
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A fluoropolymer composition is provided containing a polymer containing perfluoroolefin units or partially fluorinated olefin units or a combination thereof, polytetrafluoroethylene having a melting point a melting point of 200° C. or more and 300° C. or less, and a crosslinking agent or a crosslinking promoter or a combination thereof. A molded article having a polytetrafluoroethylene layer on a surface is also provided.

First claim

What is claimed is:

1. A fluoropolymer composition, comprising:
a polymer containing perfluoroolefin units or partially fluorinated olefin units, or a combination thereof;
polytetrafluoroethylene having a melting point of 200° C. or more and 300° C. or less; and
a crosslinking agent or a crosslinking promoter, or a combination thereof.

2. The fluoropolymer composition according to claim 1 , wherein the polytetrafluoroethylene has a number average molecular weight of 600 or more and 4000 or less.

3. The fluoropolymer composition according to claim 1 , comprising 0.1 mass parts or more and 60 mass parts or less of polytetrafluoroethylene for 100 mass parts of the polymer.

4. The fluoropolymer composition according to claim 1 , wherein, based on 100 mol % of total monomer units, the polymer contains:
10 mol % or more and 99.7 mol % or less of at least one type of monomer unit selected from a group consisting of tetrafluoroethylene units, hexafluoropropylene units, and vinylidene fluoride units; and
0.3 mol % or more and 90 mol % or less of at least one perfluorovinyl ether units.

5. A molded article, comprising a hardened material of the fluoropolymer composition according to claim 1 , and having a polytetrafluoroethylene layer on a surface of the hardened material.

6. A method for manufacturing a molded article, comprising the steps of:
forming a hardened material by heat treating the fluoropolymer composition according to claim 1 at a temperature below a melting point of the polytetrafluoroethylene; and
forming a molded article having a polytetrafluoroethylene layer on a surface of the hardened material by heat treating the hardened material at a temperature above the melting point of the polytetrafluoroethylene.

Assignees

• 3M Innovative Properties Co

Inventors

• Usami Noriyuki

Classifications

• B29C71/02

  Thermal after-treatment {(B29C71/0063 and B29C71/0072 take precedence)} · CPC title

• C08J2427/18

  Homopolymers or copolymers of tetrafluoroethylene · CPC title

• C08L27/20 Primary

  Homopolymers or copolymers of hexafluoropropene · CPC title

• C08L27/12 Primary

  containing fluorine atoms · CPC title

• C08J2327/12

  containing fluorine atoms · CPC title