# US 2013/0158200 A1 · Polyhydroxy curable fluoroelastomer compositions

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- Number: US 2013/0158200 A1
- Document ID: US20130158200A1
- Status: Published application
- Kind: A1
- Application number: 13/676,399
- Filed: 2012-11-14
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: DONALD F LYONS; Peter A. MORKEN
- Web page: https://patentgrep.com/patent/US20130158200A1

## CPC

- C08K 5/5425: containing at least one C=C bond
- C08K 5/13: Phenols; Phenolates
- C08K 5/5403: {containing no other elements than carbon or hydrogen}
- C08K 5/56: Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
- C08L 27/12: containing fluorine atoms
- C08L 27/16: Homopolymers or copolymers or vinylidene fluoride
- C08L 27/22: modified by chemical after-treatment
- C08L 43/04: Homopolymers or copolymers of monomers containing silicon
- C08L 83/06: containing silicon bound to oxygen-containing groups (C08L83/12 takes precedence)
- C08K 5/57: Organo-tin compounds
- C08L 2312/08: by silane
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Disclosed herein is a curable composition comprising a polyhydroxy curable fluoroelastomer, a polyhydroxy curative, a cure accelerator and an unsaturated metal compound process aid. Such curable compositions have a lower Mooney viscosity than do similar compositions absent the process aid.

## Claims

### Claim 1

A curable fluoroelastomer composition comprising:
A) a polyhydroxy curable fluoroelastomer;
B) a polyhydroxy curative;
C) a cure accelerator; and
D) an unsaturated metal compound process aid having the formula Y(4-n)MXn wherein Y is selected from alkyl, aryl, carboxylic acid, or alkyl ester groups; M is selected from Si, Ge, or Sn; X is an allyl group CR1R2CR3═CR4R5, vinyl group CR1═CR2R3, allenyl group CR1═C═CR2R3, alkynyl group C≡CR1, or propargyl group CR1R2C≡CR3; R1-R5 are selected independently from the group consisting of H, F, alkyl, aryl, heterocycle, or perfluoroalkyl groups; and n is 1,2, or 3.

### Claim 2 (depends on 1)

The curable composition of claim 1 wherein said unsaturated metal compound process aid is of the formula Y(4-n)MXn wherein M is Sn, X is allyl group CR1R2CR3═CR4R5, Y is alkyl or aryl, R1-R5 are H and n is 1 or 2.

### Claim 3 (depends on 2)

The curable composition of claim 2 wherein said unsaturated metal compound process aid is allyltrioctylstannane.

### Claim 4 (depends on 2)

The curable composition of claim 2 wherein said unsaturated metal compound process aid is allyltriphenylstannane.

### Claim 5 (depends on 2)

The curable composition of claim 2 wherein said unsaturated metal compound process aid is diallyldioctylstannane.

### Claim 6 (depends on 1)

The curable composition of claim 1 wherein said unsaturated metal compound process aid is of the formula Y(4-n)MXn wherein M is Sn, X is vinyl group CR1═CR2R3, Y is alkyl or aryl, R1-R3 are H and n is 1.

### Claim 7 (depends on 6)

The curable composition of claim 6 wherein said unsaturated metal compound process aid is vinyltrioctylstannane.

### Claim 8 (depends on 6)

The curable composition of claim 6 wherein said unsaturated metal compound process aid is vinyltriphenylstannane.

### Claim 9 (depends on 1)

The curable composition of claim 1 wherein said unsaturated metal compound process aid is of the formula Y(4-n)MXn wherein M is Ge, X is allyl group CR1R2CR3═CR4R5, Y is alkyl or aryl, R1-R5 are H and n is 1.

### Claim 10 (depends on 9)

The curable composition of claim 9 wherein said unsaturated metal compound process aid is allyltrioctylgermane.

### Claim 11 (depends on 9)

The curable composition of claim 9 wherein said unsaturated metal compound process aid is allyltriphenylgermane.

### Claim 12 (depends on 1)

The curable composition of claim 1 wherein said unsaturated metal compound process aid is of the formula Y(4-n)MXn wherein M is Si, X is allyl group CR1R2CR3═CR4R5, Y is alkyl or aryl, R1-R5 are H and n is 1.

### Claim 13 (depends on 12)

The curable composition of claim 12 wherein said unsaturated metal compound process aid is allyltriphenylsilane.

### Claim 14 (depends on 1)

The curable composition of claim 1 wherein said unsaturated metal compound process aid is of the formula Y(4-n)MXn wherein M is Si, X is vinyl group CR1═CR2R3, Y is alkyl or aryl, R1-R3 are H and n is 1.

### Claim 15 (depends on 14)

The curable composition of claim 14 wherein said unsaturated metal compound process aid is triphenyl(vinyl)silane.