Vulcanization of fluoroalkoxyphosphazene polymers

Claim 2

A process for the production of thermally stable, fluid resistant vulcanized polyphosphazene copolymers, terpolymers and mixtures thereof which comprises mixing 100 parts by weight of unvulcanized elastomeric polyphosphazene polymer represented as consisting of randomly distributed repeating units having the following formulae ##EQU2## in which OR and OR' are selected from the group consisting of fluoroalkoxy groups represented by the formula Z(CF 2 ) n CH 2 O-- wherein Z represents H or F and n is an integer between 2 and 9 and aryloxy groups with:

Claim 3

1 to 20 parts by weight of a coagent which is at least trifunctional and taken from the class of compounds which contain allyl, vinyl, propenyl, acrylate, or methacrylate moieties on aliphatic or aromatic or heterocyclic nuclei; 20 to 150 parts by weight of a reactive silane treated clay or aluminum silicate filler; up to 10 parts by weight or metal oxide selected from the group consisting of MgO, ZnO, ZrO 2 , or BaZrO 3 ; up to 10 parts by weight of a vulcanizing agent selected from the group consisting of benzoyl peroxide, dicumyl peroxide, and 2,5-bis(t-butylperoxy)2,5-dimethylhexane; and thereafter vulcanizing the resulting composition.

Claim 4

1 to 20 parts by weight of a coagent which is at least trifunctional and taken from the class of compounds which contain allyl, vinyl, propenyl, acrylate, or methacrylate moieties on aliphatic or aromatic or heterocyclic nuclei; 20 to 150 parts by weight of a reactive silane treated clay or aluminum silicate filler; up to 10 parts by weight or metal oxide selected from the group consisting of MgO, ZnO, ZrO 2 , or BaZrO 3 ; up to 10 parts by weight of a vulcanizing agent selected from the group consisting of benzoyl peroxide, dicumyl peroxide, and 2,5-bis(t-butylperoxy)2,5-dimethylhexane; and thereafter vulcanizing the resulting composition.

Claim 5

The process of claim 1 including in addition curing said vulcanizate at a temperature between 225°F and 350°F for up to 30 minutes.

Claim 6

The process of claim 2 including in addition post-curing the cured vulcanizate at a temperature between 150°F and 300°F for up to 24 hours.

Claim 7

The product of the process of claim 1.

Claim 8

The product of the process of claim 2.

Claim 9

The product of the process of claim 3.

Claim 10

A vulcanizable composition suitable for the production of thermally stable, fluid resistant articles comprising: between about 0.1 to 20 parts by weight of a coagent which is at least trifunctional and taken from the class of compounds which contain allyl, vinyl, propenyl, acrylate, or methacrylate moieties on aliphatic or aromatic or heterocyclic nuclei; 20 to 150 parts by weight of a reactive silane treated clay or aluminum silicate filler; up to 10 parts be weight of metal oxide selected from the group consisting of MgO, ZnO, ZrO 2 or BaZrO 3 ; up to 10 parts by weight of a vulcanizing agent selected from the group consisting of benzoyl peroxide, dicumyl peroxide and 2,5-bis(t-butylperoxy)2,5-dimethylhexane; and 100parts by weight of unvulcanized elastomeric polyphosphazene polymer represented as consisting of randomly distributed repeating units having the following formulae ##EQU3## in which OR and OR' are selected from the group consisting of fluoroalkoxy groups represented by the formula Z(CF 2 ) n CH 2 O-- wherein Z represents H or F and n is an integer between 2 and 9 and aryloxy groups.

Claim 11

A vulcanizable composition suitable for the production of thermally stable, fluid resistant articles comprising: between about 0.1 to 20 parts by weight of a coagent which is at least trifunctional and taken from the class of compounds which contain allyl, vinyl, propenyl, acrylate, or methacrylate moieties on aliphatic or aromatic or heterocyclic nuclei; 20 to 150 parts by weight of a reactive silane treated clay or aluminum silicate filler; up to 10 parts be weight of metal oxide selected from the group consisting of MgO, ZnO, ZrO 2 or BaZrO 3 ; up to 10 parts by weight of a vulcanizing agent selected from the group consisting of benzoyl peroxide, dicumyl peroxide and 2,5-bis(t-butylperoxy)2,5-dimethylhexane; and 100parts by weight of unvulcanized elastomeric polyphosphazene polymer represented as consisting of randomly distributed repeating units having the following formulae ##EQU3## in which OR and OR' are selected from the group consisting of fluoroalkoxy groups represented by the formula Z(CF 2 ) n CH 2 O-- wherein Z represents H or F and n is an integer between 2 and 9 and aryloxy groups.

Claim 12

The composition of claim 7 in which the coagent is triallylcyanurate, and the amount of coagent is 1 to 5 parts by weight per hundred parts of polyphosphazene polymer.

Claim 13

The composition of claim 7 in which the coagent is trimethylol propane trimethacrylate and the amount of coagent is 1 to 5 parts by weight per hundred parts of polyphosphazene polymer.

Claim 14

The composition of claim 7 in which the reinforcing filler is treated with gamma aminopropyltriethoxysilane from 0.01 to 5 weight percent on the reinforcing filler.

Claim 15

The composition of claim 7 in which the reinforcing filler is clay which has been treated with vinyltrismethoxyethoxysilane.

Claim 16

The composition of claim 7 in which the polyphosphazene contains the moieties CF 3 CH 2 O--:HCF 2 CF 2 CF 2 CF 2 CH 2 O--: isoeugenol in the ratio of ranges defined by the area bounded by the ternary coordinates, respectively, 67:28:5; 28:67:5; 49.99:49.99:0.02.

Claim 17

The compositional range of claim 12 where the isoeugenol is replaced by a monovalent aryloxy radical taken from the group consisting of aryloxy radicals substituted with a substitutent selected from allyl, vinyl and propenyl substituents in the ortho, meta or para positions on said aryloxy groups.

Claim 18

The composition of claim 7 wherein the polyphosphazene material comprises poly(fluoroalkoxyphosphazene).

Claim 19

The composition of claim 14 wherein the polyphosphazene is a copolymer represented by the formula ##EQU4## in which OR and OR' are randomly distributed and in which OR represents OCH 2 CF 3 and OR' represents OCH 2 CF 2 CF 2 CF 2 CF 2 .

Claim 20

The product of claim 4 in the form of a gasket or seal.

Claim 21

The product of claim 4 in the form of an O-ring.

Claim 22

The product of claim 5 in the form of a gasket or seal.

Claim 23

The product of claim 5 in the form of an O-ring.