Fluorine-containing elastomer composition and molded articles made therefrom

Claim 2

A fluorine-containing elastomer composition consisting essentially of: (A) a fluorine-containing elastomer which is vulcanizable with a peroxide and which contains iodine and/or bromine to be a vulcanizing point, (B) an organic peroxide, (C) a co-vulcanizing agent, (D) a hydrotalcite compound or a calcined product thereof.

Claim 3

The fluorine-containing elastomer composition according to claim 1, wherein the fluorine-containing elastomer of component (A) comprises (a) vinylidene fluoride units and at least one sort of other fluorine-containing monomer units, and a Mooney viscosity ML 1+10 (121° C.) of the elastomer is in the range of 1 to 200.

Claim 4

The fluorine-containing elastomer composition according to claim 2, wherein at least one sort of the other fluorine-containing monomer units in component (A) is (b) hexafluoropropylene units and 35 to 0% by weight, based on the total weight of monomer units of (a), (b) and (c), of (c) tetrafluoroethylene units, the weight ratio of (a) vinylidene fluoride units to (b) hexafluoropropylene units being in the range of 40:60 to 80:20.

Claim 5

The fluorine-containing elastomer composition according to claim 2, wherein at least one sort of the other fluorine-containing monomer units in component (A) consists of perfluoroalkyl perfluorovinyl ether units and (c) tetrafluoroethylene units.

Claim 6

The fluorine-containing elastomer composition according to claim 4, wherein perfluoroalkyl perfluorovinyl ether units in component (A) are perfluoroalkyl perfluorovinyl ether units containing a perfluoroalkyl group having a carbon number of 1 to 4.

Claim 7

The fluorine-containing elastomer composition according to claim 4, wherein perfluoroalkyl perfluorovinyl ether units in component (A) are perfluoromethyl perfluorovinyl ether units.

Claim 8

The fluorine-containing elastomer composition according to claim 1, wherein the fluorine-containing elastomer of component (A) contains iodine and/or bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 9

The fluorine-containing elastomer composition according to claim 2, wherein the fluorine-containing elastomer of component (A) contains iodine and/or bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 10

The fluorine-containing elastomer composition according to claim 3, wherein the fluorine-containing elastomer of component (A) contains iodine and/or bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 11

The fluorine-containing elastomer composition according to claim 4, wherein the fluorine-containing elastomer of component (A) contains iodine and/or bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 12

The fluorine-containing elastomer composition according to claim 5, wherein the fluorine-containing elastomer of component (A) contains iodine and/or bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 13

The fluorine-containing elastomer composition according to claim 6, wherein the fluorine-containing elastomer of component (A) contains iodine and/or bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 14

The fluorine-containing elastomer composition according to claim 1, wherein the fluorine-containing elastomer of component (A) contains iodine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 15

The fluorine-containing elastomer composition according to claim 2, wherein the fluorine-containing elastomer of component (A) contains iodine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 16

The fluorine-containing elastomer composition according to claim 3, wherein the fluorine-containing elastomer of component (A) contains iodine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 17

The fluorine-containing elastomer composition according to claim 4, wherein the fluorine-containing elastomer of component (A) contains iodine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 18

The fluorine-containing elastomer composition according to claim 1, wherein the fluorine-containing elastomer of component (A) contains bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 19

The fluorine-containing elastomer composition according to claim 2, wherein the fluorine-containing elastomer of component (A) contains bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 20

The fluorine-containing elastomer composition according to claim 3, wherein the fluorine-containing elastomer of component (A) contains bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 21

The fluorine-containing elastomer composition according to claim 4, wherein the fluorine-containing elastomer of component (A) contains bromeine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 22

The fluorine-containing elastomer composition according to claim 6, wherein the fluorine-containing elastomer of component (A) contains bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 23

The fluorine-containing elastomer composition according to claim 1, wherein the fluorine-containing elastomer of component (A) contains iodine and bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 24

The fluorine-containing elastomer composition according to claim 2, wherein the fluorine-containing elastomer of component (A) contains iodine and bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 25

The fluorine-containing elastomer composition according to claim 3, wherein the fluorine-containing elastomer of component (A) contains iodine and bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 26

The fluorine-containing elastomer composition according to claim 4, wherein the fluorine-containing elastomer of component (A) contains iodine and bromine to be a vulcanizing point in the range of 0.001 to 10 wt. % in the elastomer.

Claim 27

The fluorine-containing elastomer composition according to claim 2, wherein the organic peroxide of component (B) is at least one selected from the group consisting of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, dicumyl peroxide, and α,α'-bis(tert-butylperoxy-m-isopropyl)benzene.

Claim 28

The fluorine-containing elastomer composition according to claim 2, wherein the co-vulcanizing agent of component (C) is triallyl isocyanurate.

Claim 29

The fluorine-containing elastomer composition according to claim 2, wherein the hydrotalcite compound of component (D) is the hydrotalcite compound represented by the structural formula: [Mg.sub.X Al.sub.2 (OH).sub.2x+6-2Z ].sup.2Z+ (CO.sub.3.sup.2-).sub.Z.mH.sub.2 O wherein x is a positive number not lower than 2, z is a number selected from 0, 1 and 2, and m is a positive number, or a calcined product thereof.

Claim 30

The fluorine-containing elastomer composition according to claim 2, wherein the hydrotalcite compound of component (D) is the hydrotalcite compound represented by the structural formula: [Mg.sub.X Al.sub.2 (OH).sub.2x+6-2Z ].sup.2Z+ (CO.sub.3.sup.2-).sub.Z.mH.sub.2 O wherein x is a positive number not lower than 2, z is a number selected from 0, 1 and 2, and m is a positive number.

Claim 31

The fluorine-containing elastomer composition according to claim 2, wherein the composition consists of, (A) a fluorine-containing elastomer which is vulcanizable with a peroxide and which contains iodine and/or bromine to be a vulcanizing point, (B) an organic peroxide, (C) a co-vulcanizing agent, (D) a hydrotalcite compound or a calcined product thereof, and (E) a filler.

Claim 32

The fluorine-containing elastomer composition according to claim 1, wherein the composition consists of, (A) a fluorine-containing elastomer which is vulcanizable with a peroxide and which contains iodine and/or bromine to be a vulcanizing point, (B) an organic peroxide, (C) a co-vulcanizing agent, and (D) a hydrotalcite compound or a calcined product thereof.

Claim 33

The fluorine-containing elastomer composition according to claim 2, wherein the fluorine-containing elastomer of component (A) is a fluorine-containing elastomer which contains iodine and/or bromine to be a vulcanizing point, and which consists of (a) vinylidene fluoride units, (b) hexafluoropropylene units and 35 to 0% by weight, based on the total weight of monomer units of (a), (b) and (c), of (c) tetrafluoroethylene units, the weight ratio of (a) vinylidene fluoride units to (b) hexafluoropropylene units being in the range of 40:60 to 80:20; the organic peroxide of component (B) is at least one selected from the group consisting of 2,5-dimethyl-2,5-di(tert-butylperoxy)-hexane, dicumyl peroxide, and α,α'-bis(tert-butylperoxy-m-isopropyl)benzene; the co-vulcanizing agent of component (C) is triallyl isocyanurate; and the hydrotalcite compound of component (D) is the hydrotalcite compound represented by the structural formula: [Mg.sub.X Al.sub.2 (OH).sub.2x+6-2Z ].sup.2Z+ (CO.sub.3.sup.2-).sub.z.mH.sub.2 O wherein x is a positive number not lower than 2, z is a number selected from 0, 1 and 2, and m is a positive number, or the calcined material thereof.

Claim 34

The fluorine-containing elastomer composition according to claim 2, wherein the fluorine-containing elastomer of component (A) is a fluorine-containing elastomer which contains iodine and/or bromine to be a vulcanizing point, and which consists of (a) vinylidene fluoride units, (b) hexafluoropropylene units and (c) tetrafluoroethylene units; the organic peroxide of component (B) is at least one selected from the group consisting of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, dicumyl peroxide, and α,α'-bis(tert-butylperoxy-m-isopropyl)benzene; the co-vulcanizing agent of component (C) is triallyl isocyanurate; and the hydrotalcite compound of component (D) is the hydrotalcite compound represented by the structural formula: [Mg.sub.X Al.sub.2 (OH).sub.2x+6-2Z ].sup.2Z+ (CO.sub.3.sup.2-).sub.z.mH.sub.2 O wherein x is a positive number not lower than 2, z is a number selected from 0, 1 and 2, and m is a positive number, or the calcined material thereof.

Claim 35

The fluorine-containing elastomer composition according to claim 2, wherein, based on 100 parts by weight of the fluorine-containing elastomer of component (A), the amount of the organic peroxide of component (B) is in the range of 0.05 to 5 parts by weight, the amount of the co-vulcanizing agent of component (C) is in the range of 0.1 to 10 parts by weight, the amount of the hydrotalcite compound of component (D) is in the range of 0.5 to 40 parts by weight.

Claim 36

A molded article made from the fluorine-containing elastomer composition according to claim 1.

Claim 37

A molded article made from the fluorine-containing elastomer composition according to claim 32.

Claim 38

A molded article made from the fluorine-containing elastomer composition according to claim 33.

Claim 39

A laminate which comprises a metal, a resin, an elastomer or a fiber and the cured product of the fluorine-containing elastomer composition according to claim 1, which are laminated with an adhesive cured by vulcanization.

Claim 40

A laminate which comprises a metal, a resin, an elastomer or a fiber and the cured product of the fluorine-containing elastomer composition according to claim 32, which are laminated with an adhesive cured by vulcanization.

Claim 41

A laminate which comprises a metal, a resin, an elastomer or a fiber and the cured product of the fluorine-containing elastomer composition according to claim 33, which are laminated with an adhesive cured by vulcanization.

Claim 42

The molded article according to claim 35, which is an O-ring.

Claim 43

The molded article according to claim 35, which is a gasket.

Claim 44

The laminate according to claim 38, which is an oil-seal.