# US RE31,324 E · Fluorine containing organosilicon compounds

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- Number: US RE31,324 E
- Document ID: USRE31324E
- Status: Granted
- Kind: E
- Application number: 06/367,756
- Filed: 1982-04-12
- Granted: 1983-07-26
- Earliest claimed: 1980-10-08
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: David Apotheker, deceased
- Web page: https://patentgrep.com/patent/USRE31324E

## Abstract

Addition to organosilicon compounds having at least one alkyl group attached to a silicon atom, at least one hydrogen atom being attached to the carbon atom adjacent the silicon atom, of a fluorocompound, which may be a fluoroolefin[, a perfluoroketone,] or a perfluoroether having a carbon-carbon double bond in .alpha.-position to the ether oxygen atom, give fluorine-containing organosilicon compounds. These adducts may be liquid or solid and are useful as (1) lubricants and sealants for automotive and aerospace industries (2) fire-resistant hydraulic fluids, and (3) siloxane elastomers having good oil and lubricant resistance.

## Claims

### Claim 1

A fluorine-containing organosilicon compound made by the addition to an organosilicon compound having at least one alkyl group attached to a silicon atom, at least one hydrogen atom being bonded to the carbon atom adjacent the silicon atom, of a fluorocompound selected from the class consisting of the following:
(A) fluoroolefins having one of the following formulas (1), (2), and (3): ##STR12## [(B) ketones having the following formula (4):] ##STR13## and
(C) ethers having the following formula [(5)] (4) ##STR14## where Each R.sub.f independently is a C.sub.1 -C.sub.8 saturated perfluoroalkyl;
R'.sub.f is Br or R.sub.f,
R".sub.f is R.sub.f or a radical obtained by removing one fluorine atom from a perfluoroalkyl ether; and
m in formula (3) is an integer of 2 to 12.

### Claim 2 (depends on 1)

A compound of claim 1, which is an adduct of a fluorocompound with a linear or cyclic siloxane.

### Claim 3 (depends on 2)

A compound of claim 2, wherein the siloxane has the following formula ##STR15## wherein each of R and R' is alkyl; if the siloxane is cyclic, n is 3-6; and if the siloxane is linear, n is 2-10,000 and is represented by the formula ##STR16##

### Claim 4 (depends on 1)

A compound of claim 1 which is an adduct of an organosilicon compound with a fluorocompound selected from the group consisting of hexafluoropropene, perfluoromethyl vinyl ether, [hexafluoroacetone,] and bromotrifluoroethylene.