EP0204526A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Silicone elastomers
Assignee: Xerox Corp
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Filing: 1986-05-30
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Granted: —
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Expires: 2006-05-30
Abstract
Abstract A silicone composition curable to a heat stabilized silicone elastomer, comprising at least one polyorganosiloxane having the formula:
Inventors
- 👤 George J. Heeks
- 👤 Edward L. Schlueter, (Jr.)
- 👤 Arnold W. Henry
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08K; C08K5/00; C08K5/0091; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
366 words
A fuser member for use in an electrostatographic reproducing machine, comprising a rigid base, a thin deformable layer of a composition coated thereon comprising the crosslinked product of a mixture of: a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any methyl, hydroxy or vinyl group. b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula where each R, may be any alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R', is an X'-substituted R,, as defined, each of Z, Y and X' may be any carboxy or substituted or unsubstituted nitrogen, sulfur or arsenic; X is R, substituted or unsubstituted nitrogen, sulfur or arsenic, p is 0 to 4 and unsubstituted nitrogen, sulfur and arsenic are defined as -NH 2 , -AsH 2 and -SH respectively, and each hydrogen may be substituted by R,, the complex being present in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane and being predispersed in a polyorganosiloxane oil or blend of polyorganosiloxane oils of the formula: where R' is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A' and B' may be any methyl, hydroxy or vinyl group, R', A' and B' being selected to minimize reaction with R, A or B in the formula in "a" to minimize the formation of a crosslinked product therebetween, 0 < m' n' ≦ 1 and 8 < m' + n' < 20 00, the oil or blend of oils having a viscosity within the range from 50 to 100,000 centistokes and being present in an amount of from about 5 to 100 parts per 100 parts of "a", c) from 5 to 500 parts by weight of finely-divided fillers, and d) a crosslinking agent and a crosslinking catalyst, the crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of the polyorganosiloxane.
Claim 2
Dependent Claim
366 words
A fuser member for use in an electrostatographic reproducing machine, comprising a rigid base, a thin deformable layer of a composition coated thereon comprising the crosslinked product of a mixture of: a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any methyl, hydroxy or vinyl group. b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula where each R, may be any alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R', is an X'-substituted R,, as defined, each of Z, Y and X' may be any carboxy or substituted or unsubstituted nitrogen, sulfur or arsenic; X is R, substituted or unsubstituted nitrogen, sulfur or arsenic, p is 0 to 4 and unsubstituted nitrogen, sulfur and arsenic are defined as -NH 2 , -AsH 2 and -SH respectively, and each hydrogen may be substituted by R,, the complex being present in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane and being predispersed in a polyorganosiloxane oil or blend of polyorganosiloxane oils of the formula: where R' is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A' and B' may be any methyl, hydroxy or vinyl group, R', A' and B' being selected to minimize reaction with R, A or B in the formula in "a" to minimize the formation of a crosslinked product therebetween, 0 < m' n' ≦ 1 and 8 < m' + n' < 20 00, the oil or blend of oils having a viscosity within the range from 50 to 100,000 centistokes and being present in an amount of from about 5 to 100 parts per 100 parts of "a", c) from 5 to 500 parts by weight of finely-divided fillers, and d) a crosslinking agent and a crosslinking catalyst, the crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of the polyorganosiloxane.
Claim 3
Dependent Claim
23 words
The fuser member of claim 1 wherein said at least one polyorganosiloxane is a liquid addition curable vinyl terminated or vinyl pendant polyorganosiloxane.
Claim 4
Dependent Claim
44 words
The fuser member of claim 2, wherein said at least one polyorganosiloxane has the formula: where A",B" and R" are methyl or vinyl provided the vinyl functionality is at least 2.0 < s o ≦ 1 , 350 < r + s < 2700.
Claim 5
Dependent Claim
23 words
The fuser member of claim 3, wherein said crosslinking agent is a methylhydrodimethylsilox- ane copolymer with from about 15 to 70 percent methylhydrogen..
Claim 6
Dependent Claim
44 words
The fuser member of claim 2 wherein a portion of the polyorganosiloxane is premixed with the crosslinking catalyst and a portion of the filler and the remaining portion of the polyorganosiloxane is premixed with the crosslinking agent and the remaining portion of the filler.
Claim 7
Dependent Claim
22 words
The fuser member of claim 1 wherein said at least one polyorganosiloxane is a condensation curable silanol terminated or silanol pendant polyorganosiloxane.
Claim 8
Dependent Claim
44 words
The fuser member of claim 6 wherein a portion of the polyorganosiloxane is premixed with the crosslinking catalyst and a portion of the filler and the remaining portion of the polyorganosiloxane is premixed with the crosslinking agent and the remaining portion of the filler.
Claim 9
Dependent Claim
29 words
The fuser member of claim 1 wherein said at least one polyorganosiloxane is a peroxide curable vinyl terminated or vinyl pendant polyorganosiloxane having an m + n > 3000.
Claim 10
Dependent Claim
36 words
The fuser member of claim 1 wherein said complex is present in an amount of from about 1 to about 20 parts by weight per 100 parts by weight of total polyorganosiloxane as designated in "a".
Claim 11
Dependent Claim
15 words
The fuser member of claim 9 wherein said complex is bis(ethylene diamine) copper (II) sulfate.
Claim 12
Dependent Claim
13 words
The fuser member of claim 1 wherein said oil comprises a trimethylendblock polyorganosiloxane.
Claim 13
Dependent Claim
48 words
The fuser member of claim 1 wherein the complex is predispersed in a blend of a polyorganosiloxane oil having a viscosity of from about 50 to 100 centistokes and a polyorganosiloxane oil having a viscosity of from about 100 to about 100,000 centistokes by mechanical grinding and dispersion.
Claim 14
Dependent Claim
46 words
The fuser member of claim 12, wherein the complex is initially predispersed in a polyorganosiloxane oil having a viscosity of from about 50 to 100 centistokes and the resulting dispersion is added to a polyorganosiloxane oil having a viscosity of from about 100 to 100,000 centistokes.
Claim 15
Dependent Claim
192 words
A composition curable to a heat stabilized crosslinked silicone elastomer when mixed with a crosslinking agent and crosslinking catalyst in amounts sufficient to promote crosslinking, comprising; a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any methyl, hydroxy or vinyl group, b) a complex comprising a transition meta sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula or where each R, may be any of alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R', is an X'-substituted R,, as defined, each of Z, Y and X' may be of any carboxy or substituted or unsubstituted nitrogen, sulfur or arsenic, X is substituted or unsubstituted nitrogen, sulfur or arsenic, and p is 0 to 4, the complex being present in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane, and c) from about 5 to about 500 parts by weight of finely-divided fillers.
Claim 16
Dependent Claim
192 words
A composition curable to a heat stabilized crosslinked silicone elastomer when mixed with a crosslinking agent and crosslinking catalyst in amounts sufficient to promote crosslinking, comprising; a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any methyl, hydroxy or vinyl group, b) a complex comprising a transition meta sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula or where each R, may be any of alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R', is an X'-substituted R,, as defined, each of Z, Y and X' may be of any carboxy or substituted or unsubstituted nitrogen, sulfur or arsenic, X is substituted or unsubstituted nitrogen, sulfur or arsenic, and p is 0 to 4, the complex being present in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane, and c) from about 5 to about 500 parts by weight of finely-divided fillers.
Claim 17
Dependent Claim
207 words
A heat stabilized silicone elastomer comprising the crosslinked product of; a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any of methyl, hydroxy or vinyl groups, b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula or where each R, may be any of alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R'. is an X' substituted R, as defined, each of Z. Y and X' may be any of carboxy or substituted or unsubstituted nitrogen, sulfur or arsenic, X is substituted or unsubstituted nitrogen, sulfur or arsenic and p is 0 to 4, said complex being present in an amount sufficient to inhibit oxidative degradation of said polyorganosiloxane. c) from about 5 to about 500 parts by weight of finely divided fillers, and d) a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyorganosiloxane.
Claim 18
Dependent Claim
207 words
A heat stabilized silicone elastomer comprising the crosslinked product of; a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and B may be any of methyl, hydroxy or vinyl groups, b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of the formula or where each R, may be any of alkyl having 1 to 6 carbon atoms, or an aryl moiety having less than 19 carbon atoms, R'. is an X' substituted R, as defined, each of Z. Y and X' may be any of carboxy or substituted or unsubstituted nitrogen, sulfur or arsenic, X is substituted or unsubstituted nitrogen, sulfur or arsenic and p is 0 to 4, said complex being present in an amount sufficient to inhibit oxidative degradation of said polyorganosiloxane. c) from about 5 to about 500 parts by weight of finely divided fillers, and d) a crosslinking agent and a crosslinking catalyst, said crosslinking agent and catalyst being present in an amount sufficient to promote crosslinking of said at least one polyorganosiloxane.
Claim 19
Dependent Claim
32 words
A fuser member for use in an electrostatographic reproducing machine comprising a rigid base, a thin deformable layer of a composition coated thereon comprising the crosslinked product of a mixture of about;
Claim 20
Dependent Claim
32 words
A fuser member for use in an electrostatographic reproducing machine comprising a rigid base, a thin deformable layer of a composition coated thereon comprising the crosslinked product of a mixture of about;
Claim 21
Dependent Claim
245 words
a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and D may be any of methyl, hydroxy or vinyl groups, b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of ethylene diamine, diethylene triamine, 0-phenylene bisdimethylarsine, glycine, tetramethylene diamine, propylene diamine, isobutylene diamine, or butylene diamine, the complex being present in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane and being predispersed in a polyorganosiloxane oil or blend of polyorganosiloxane oils of the formula: where R' is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A' and D' may be any methyl, hydroxy or vinyl group, R', A' and D' being selected to minimize reaction with R, A or D in the formula in "a" to minimize the formation of a crosslinked product therebetween the oil or blend of oils having a viscosity within the range from 50 to 100,000 centistokes and being present in an amount of from 5 to 100 parts per 100 parts of "a", c) from about 5 to about 500 parts by weight of finely-divided fillers, and d) a crosslinking agent and a crosslinking catalyst present in an amount sufficient to promote crosslinking of the at least one polyorganosiloxane.
Claim 22
Dependent Claim
245 words
a) 100 parts by weight of at least one polyorganosiloxane having the Formula "a": where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and D may be any of methyl, hydroxy or vinyl groups, b) a complex comprising a transition metal sulfate, nitrate, phosphate, halide, acetate, carboxylate, nitrite or perfluoroborate and at least one polydentate chelating ligand of ethylene diamine, diethylene triamine, 0-phenylene bisdimethylarsine, glycine, tetramethylene diamine, propylene diamine, isobutylene diamine, or butylene diamine, the complex being present in an amount sufficient to inhibit oxidative degradation of the polyorganosiloxane and being predispersed in a polyorganosiloxane oil or blend of polyorganosiloxane oils of the formula: where R' is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A' and D' may be any methyl, hydroxy or vinyl group, R', A' and D' being selected to minimize reaction with R, A or D in the formula in "a" to minimize the formation of a crosslinked product therebetween the oil or blend of oils having a viscosity within the range from 50 to 100,000 centistokes and being present in an amount of from 5 to 100 parts per 100 parts of "a", c) from about 5 to about 500 parts by weight of finely-divided fillers, and d) a crosslinking agent and a crosslinking catalyst present in an amount sufficient to promote crosslinking of the at least one polyorganosiloxane.
Claim 23
Dependent Claim
37 words
The fuser member of claim 16, wherein the complex is of bis(ethylene diamine) copper (II) sulfate, bis(propylene diamine) copper (II) sulfate, bis-(diethylene triamine), cobalt (III) nitrate, tris-(ethylene diamine) cobalt (III) chloride, or bis-(ethylene diamine) platinum (II) chloride.
Claim 24
Dependent Claim
29 words
The fuser member of claim 16 or 17, wherein the at least one polyorganosiloxane as designated in "a" is a liquid addition curable vinyl terminated or vinyl pendant polyorganosiloxane.
Claim 25
Dependent Claim
45 words
The fuser member of claim 18, wherein the at least one polyorganosiloxane has the formula: where A", D" and R" are methyl or vinyl, provided the vinyl functionality is at least 2, and 0 < s o ≦ 1,350 < r + s < 2700.
References Cited (Backward Citations)
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