Fluorine rubber composition

• US 5,587,413 A
• Filed: 01/05/1996
• Issued: 12/24/1996
• Est. Priority Date: 01/13/1995
• Status: Expired due to Term

• Current Assignee: Nippon Mektron Limited (NOK Corporation)
• Original Assignee: Nippon Mektron Limited (NOK Corporation)
• Inventors: Naraki, Akihiro, Tatsu, Haruyoshi, Yamashita, Eiichi, Enokida, Takashi
• Primary Examiner(s): BUTTNER, DAVID J
• Application Number:
  US08/583,642
• Time in Patent Office: 354 Days
• Field of Search: 524/200, 525/326.3, 525/326.4, 525/128, 525/129, 560/158, 560/167, 560/25, 560/33
• US Class Current: 524/200
• CPC Class Codes: B32B 15/06 of natural rubber or synthetic rubber
• CPC Class Codes: C07C 275/40 being further substituted by nitrogen atoms not being part of nitro or nitroso groups
• CPC Class Codes: C08K 5/205 Compounds containing groups, e.g. carbamates
• CPC Class Codes: C08L 27/12 containing fluorine atoms
• CPC Class Codes: C09K 2200/0208 Carbon
• CPC Class Codes: C09K 2200/0239 Oxides, hydroxides, carbonates
• CPC Class Codes: C09K 3/1009 Fluorinated polymers, e.g. PTFE
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated

Abstract

A fluorine rubber composition comprising a fluorine rubber and a polyfluoroalkyl group-containing block isocyanate compound represented by the following general formula:

Rf(CH.sub.2)nXCONHRNHCOO(N═C--R.sup.2)mR.sup.1

where Rf is a polyfluoroalkyl group having 4 to 20 carbon atoms; R is a divalent organic group; R¹ is a lower alkyl group or phenyl group; R² is a lower alkyl group; X is NH or O; n is an integer of 1 to 4 and m is 0 or 1, has a good vulcanization bond to metals without any substantial decrease in the rubber stretchability properly owned by the fluorine rubber.

Claims

1. A fluorine rubber composition, which comprises a fluorine rubber and a polyfluoroalkyl group-containing block isocyanate compound represented by the following general formula:

space="preserve" listing-type="equation">Rf(CH.sub.2)nXCONHRNHCOO(N═

C--R.sup.2)mR.sup.1

where Rf is a polyfluoroalkyl group having 4 to 20 carbon atoms;

R is a divalent organic group;

R¹ is a lower alkyl group or phenyl group;

R² is a lower alkyl group;

X is NH or O;

n is an integer of 1 to 4 and m is 0 or 1.

2. A fluorine rubber composition according to claim 1, wherein about 0.05 to about 1 parts by weight of the polyfluoroalkyl group-containing block isocyanate compound is used per 100 parts by weight of the fluorine rubber.

3. A fluorine rubber composition according to claim 1, for vulcanization bonding to a metal.