US4960811A — Fluorosilicone compositions with improved elastic…

Claim 1

Independent Claim 165 words

A fluorosilicone rubber composition comprising: (A) 100 parts by weight of the reaction product of: (1) 100 parts by weight of a fluorosilicone cyclic trimer; (2) from about 0.5 to about 2.0 parts by weight of a chain modifier mixture comprising: (a) from 20% to 96% by weight vinyl terminated polysiloxanes of the formula: ##STR12## and (b) from 4% to 80% by weight siloxanes of the formula: ##STR13## wherein Vi is vinyl, R is selected from the class consisting of C 1-4 alkyl and phenyl radicals; R 1 is R or --(CH 2 ) 2 --R 2 ; R 2 is perfluoroalkyl of from 1 to 4 carbon atoms; x=30 to 45; y=15 to 30; and z=3 to 6; (3) from about 0.045 to about 0.065 parts by weight 1,3,5-trimethyl-b 1,3,5-trivinylsiloxane cyclic trimer; and (4) sufficient sodium fluorosilanolate to provide 10 ppm of NaOH; and (B) from about 1 to about 10 parts by weight of polydimethylsiloxane gum having approximately 3.2 weight percent vinyl groups;

Claim 2

Dependent Claim 165 words

A fluorosilicone rubber composition comprising: (A) 100 parts by weight of the reaction product of: (1) 100 parts by weight of a fluorosilicone cyclic trimer; (2) from about 0.5 to about 2.0 parts by weight of a chain modifier mixture comprising: (a) from 20% to 96% by weight vinyl terminated polysiloxanes of the formula: ##STR12## and (b) from 4% to 80% by weight siloxanes of the formula: ##STR13## wherein Vi is vinyl, R is selected from the class consisting of C 1-4 alkyl and phenyl radicals; R 1 is R or --(CH 2 ) 2 --R 2 ; R 2 is perfluoroalkyl of from 1 to 4 carbon atoms; x=30 to 45; y=15 to 30; and z=3 to 6; (3) from about 0.045 to about 0.065 parts by weight 1,3,5-trimethyl-b 1,3,5-trivinylsiloxane cyclic trimer; and (4) sufficient sodium fluorosilanolate to provide 10 ppm of NaOH; and (B) from about 1 to about 10 parts by weight of polydimethylsiloxane gum having approximately 3.2 weight percent vinyl groups;

Claim 3

Dependent Claim 16 words

The fluorosilicone rubber composition of claim 1 wherein the fluorosilicone cyclic trimer is methyl-3,3,3-trifluoropropylsiloxane cyclic trimer.

Claim 4

Dependent Claim 25 words

The fluorosilicone rubber composition of claim 1 wherein there is further added from about 3 to about 10 parts plasticizer per 100 parts component A(1).

Claim 5

Dependent Claim 14 words

The fluorosilicone rubber composition of claim 3 wherein the plasticizer is alkoxy terminated polydimethylsiloxane.

Claim 6

Dependent Claim 54 words

The fluorosilicone rubber composition of claim 4 wherein there is further added a mixture comprising: a. from about 10 to about 200 parts by weight fumed silica; b. from about 0.02 to about 1.0 parts by weight vinyl silazane; and c. from about 14 to about 25 parts by weight fluorosilicone telomeric siloxanol fluid.

Claim 7

Dependent Claim 22 words

The fluorosilicone rubber composition of claim 5 wherein there is further added from about 0.25 to about 2.0 parts rare earth octoate.

Claim 8

Dependent Claim 37 words

The fluorosilicone rubber composition of claim 5 wherein there is further added a mixture comprising: a. from about 0.01 to about 0.1 parts iron octoate and b. from about 0.3 to about 2.0 parts TiO 2 .

Claim 9

Dependent Claim 145 words

A process of manufacturing fluorosilicone rubber compositions comprising: (A) Adding to a reactor a base polymer composition comprising: (1) 100 parts by weight of a fluorosilicone cyclic trimer; (2) from about 0.5 to about 2.0 parts by weight of a chain modifier mixture per 100 parts by weight component (A)(1) from about 0.5 to about 2.0 parts by weight of a chain modifier mixture per 100 parts by weight component (A)(1) comprising: (a) from 20% to 96% by weight vinyl terminated polysiloxanes of the formula: ##STR14## and (b) from 4% to 80% by weight siloxanes of the formula: ##STR15## wherein Vi is vinyl, R is selected from the class consisting of C 1-4 alkyl and phenyl radicals; R 1 is R or --(CH 2 ) 2 --R 2 , R 2 is perfluoroalkyl of from 1 to 4 carbon atoms, x=30 to 45, y=15 to

Claim 10

Dependent Claim 145 words

A process of manufacturing fluorosilicone rubber compositions comprising: (A) Adding to a reactor a base polymer composition comprising: (1) 100 parts by weight of a fluorosilicone cyclic trimer; (2) from about 0.5 to about 2.0 parts by weight of a chain modifier mixture per 100 parts by weight component (A)(1) from about 0.5 to about 2.0 parts by weight of a chain modifier mixture per 100 parts by weight component (A)(1) comprising: (a) from 20% to 96% by weight vinyl terminated polysiloxanes of the formula: ##STR14## and (b) from 4% to 80% by weight siloxanes of the formula: ##STR15## wherein Vi is vinyl, R is selected from the class consisting of C 1-4 alkyl and phenyl radicals; R 1 is R or --(CH 2 ) 2 --R 2 , R 2 is perfluoroalkyl of from 1 to 4 carbon atoms, x=30 to 45, y=15 to

Claim 11

Dependent Claim 75 words

and z=3 to 6; (3) from about 0.045 to about 0.065 parts by weight 1,3,5-trimethyl-1,3,5-trivinylsiloxane cyclic trimer; and (4) sufficient sodium fluorosilanolate to provide 10 ppm of NaOH; and (B) Heating the base polymer composition of part (A) to approximately 118-135° C. to initiate the reaction; (C) Mixing into the base polymer, the polymer of step A, from about 1 to about 10 parts by weight of polydimethylsiloxane gum having 3.2 weight percent vinyl groups.

Claim 12

Dependent Claim 75 words

and z=3 to 6; (3) from about 0.045 to about 0.065 parts by weight 1,3,5-trimethyl-1,3,5-trivinylsiloxane cyclic trimer; and (4) sufficient sodium fluorosilanolate to provide 10 ppm of NaOH; and (B) Heating the base polymer composition of part (A) to approximately 118-135° C. to initiate the reaction; (C) Mixing into the base polymer, the polymer of step A, from about 1 to about 10 parts by weight of polydimethylsiloxane gum having 3.2 weight percent vinyl groups.

Claim 13

Dependent Claim 14 words

The process of claim 8 wherein the fluorosilicone cyclic trimer is methyl-3,3,3-trifluoropropyl cyclic trimer.

Claim 14

Dependent Claim 29 words

The process of claim 8 wherein there is further mixed into the fluorosilicone rubber composition a plasticizer from about 3 to about 10 parts per 100 parts component (A(1).

Claim 15

Dependent Claim 12 words

The process of claim 10 wherein the plasticizer is alkoxy terminated polydimethylsiloxane.

Claim 16

Dependent Claim 57 words

The process of claim 11 wherein there is further mixed into the fluorosilicone rubber composition a mixture comprising: a. from about 10 to about 200 parts by weight fumed silica; b. from about 0.02 to about 1.0 parts by weight vinyl silazane; and c. from about 14 to about 25 parts by weight fluorosilicone telomeric siloxanol fluid.

Claim 17

Dependent Claim 25 words

The process of claim 12 wherein there is further mixed into the fluorosilicone rubber composition from about 0.25 to about 2.0 parts rare earth octoate.

Claim 18

Dependent Claim 40 words

The process of claim 12 wherein there is further mixed into the fluorosilicone rubber composition a mixture comprising: a. from about 0.01 to about 0.1 parts iron octoate and b. from about 0.3 to about 2.0 parts TiO 2 .

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-10-01	1994-04-02	1994-10-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-10-01	1998-04-02	1998-10-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-10-01	2002-04-02	2002-10-02	$7700.00	Window Closed / Lapsed

Fluorosilicone compositions with improved elastic response

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