# US 2013/0280490 A1 · Fluorine rubber molded article

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- Number: US 2013/0280490 A1
- Document ID: US20130280490A1
- Status: Published application
- Kind: A1
- Application number: 13/995,781
- Filed: 2011-12-27
- Published: 2013-10-24
- Earliest claimed: 2011-01-15
- Assignees: Daikin Industries, Ltd.
- Inventors: Kouhei Takemura; Tomihiko Yanagiguchi
- Web page: https://patentgrep.com/patent/US20130280490A1

## CPC

- C08J 5/00: Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00)
- C08J 3/246: {Intercrosslinking of at least two polymers}
- C08J 2327/16: Homopolymers or copolymers of vinylidene fluoride
- C08J 2327/18: Homopolymers or copolymers of tetrafluoroethylene
- C08L 2205/02: containing two or more polymers of the same C08L -group
- Y10T 428/24479: including variation in thickness
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A fluororubber molded article produced by crosslinking a crosslinkable composition containing a fluororubber (A) and a fluororesin (B), wherein the fluororubber molded article has a surface with projecting portions, an area ratio of areas having the projecting portions to the entire surface of the fluororubber molded article is not less than 0.06, a volume ratio of the fluororesin (B) to the fluororubber molded article is 0.05 to 0.45, the area ratio of the areas having the projecting portions is 1.2 times or more larger than the volume ratio of the fluororesin (B), and the fluororesin (B) is a tetrafluoroethylene/hexafluoropropylene copolymer.

## Claims

### Claim 1

A fluororubber molded article produced by crosslinking a crosslinkable composition comprising a fluororubber (A) and a fluororesin (B),
wherein the fluororubber molded article has a surface with projecting portions,
an area ratio of areas having the projecting portions to the entire surface of the fluororubber molded article is not less than 0.06,
a volume ratio of the fluororesin (B) to the fluororubber molded article is 0.05 to 0.45,
the area ratio of the areas having the projecting portions is 1.2 times or more larger than the volume ratio of the fluororesin (B), and
the fluororesin (B) is a tetrafluoroethylene/hexafluoropropylene copolymer.

### Claim 2 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the projecting portions are substantially formed of the fluororesin (B) that is a component of the crosslinkable composition.

### Claim 3 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the projecting portions have a height of 0.2 to 5.0 μm and a standard deviation of the height of not more than 0.300.

### Claim 4 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the projecting portions have a bottom with a cross-sectional area of 2 to 500 μm2.

### Claim 5 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the number of the projecting portions is 3000 to 60000 per mm2.

### Claim 6 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the fluororubber (A) comprises at least one selected from the group consisting of vinylidene fluoride/hexafluoropropylene copolymers, vinylidene fluoride/hexafluoropropylene/tetrafluoroethylene copolymers, tetrafluoroethylene/propylene copolymers, tetrafluoroethylene/propylene/vinylidene fluoride copolymers, ethylene/hexafluoropropylene copolymers, ethylene/hexafluoropropylene/vinylidene fluoride copolymers, ethylene/hexafluoropropylene/tetrafluoroethylene copolymers, vinylidene fluoride/tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymers, and vinylidene fluoride/chlorotrifluoroethylene copolymers.

### Claim 7 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the fluororubber molded article is a sealing material.

### Claim 8 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the fluororubber molded article is a slide member.

### Claim 9 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the fluororubber molded article is a non-adhesive member.

### Claim 10 (depends on 1)

The fluororubber molded article according to claim 1,
wherein the surface is water and oil repellent.