US5674937A
Expired / Lapsed
US
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Elastomers from silicone emulsions having self-catalytic crosslinkers
Assignee: Dow Silicones Corp
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Filing: 1995-04-27
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Granted: 1997-10-07
•
Expires: 2015-04-27
Abstract
Abstract A crosslinked polysiloxane dispersion comprising a product of a siloxane polymer or polymer mixture having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s, and at least one self catalyzing crosslinker, a surfactant, and water.
Inventors
- 👤 Daniel Trent Berg
- 👤 Eric Jude Joffre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08L; C08L83/00; C08G; C08G77/00; C08G77/04; C08L83/04; C08L83/14; C08G77/045; C08G77/14; C08G77/18; C08G77/22; C08G77/26; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
40 words
A crosslinked polysiloxane dispersion comprising a product of (A) a siloxane polymer or polymer mixture having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s and (B) at least one self catalyzing crosslinker, a surfactant, and water.
Claim 2
Dependent Claim
40 words
A crosslinked polysiloxane dispersion comprising a product of (A) a siloxane polymer or polymer mixture having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s and (B) at least one self catalyzing crosslinker, a surfactant, and water.
Claim 3
Dependent Claim
24 words
The dispersion of claim 1, wherein the polysiloxane dispersion has a silicone content of from 1% to 98% by weight of the polysiloxane dispersion.
Claim 4
Dependent Claim
24 words
The dispersion of claim 1, wherein the polysiloxane dispersion has a silicone content of from 40% to 90% by weight of the polysiloxane dispersion.
Claim 5
Dependent Claim
25 words
The dispersion of claim 1, wherein 1 to 10 parts by weight of surfactant is present per 100 parts of siloxane polymer or polymer mixture.
Claim 6
Dependent Claim
25 words
The dispersion of claim 1, wherein 1 to 5 parts by weight of surfactant is present per 100 parts of siloxane polymer or polymer mixture.
Claim 7
Dependent Claim
25 words
The dispersion of claim 1, wherein 10 to 60 parts by weight of water is present per 100 parts of siloxane polymer or polymer mixture.
Claim 8
Dependent Claim
27 words
The dispersion of claim 1, wherein 0.1 to 5 parts by weight of self catalyzing crosslinker is present per 100 parts of siloxane polymer or polymer mixture.
Claim 9
Dependent Claim
29 words
The dispersion of claim 1, wherein the self catalyzing crosslinker has at least one catalytic leaving group selected from the group consisting of acetoxy, amide, acetamide, aminoxy and oxime.
Claim 10
Dependent Claim
45 words
The dispersion of claim 1, wherein the self catalyzing crosslinker is ##STR7## where R is the same or different alkyl group having from 1 to 8 carbon atoms inclusive, and a is 0 or a positive integer, and b is an integer greater than 2.
Claim 11
Dependent Claim
31 words
The dispersion of claim 1, wherein the dispersion includes a stabilizer of the formula: ##STR8## where Me is a methyl group, and z is an integer from 3 to 40 inclusive.
Claim 12
Dependent Claim
29 words
The dispersion of claim 1, wherein the dispersion includes an in situ resin reinforcer selected from the group consisting of methyltrimethoxy silane, vinyltrimethoxy silane, tetraethyl orthosilicate, and normal propylorthosilicate.
Claim 13
Dependent Claim
17 words
The dispersion of claim 1, wherein the surfactant is not an alkyl sulfate, alkyl sulfonate, or taurate.
Claim 14
Dependent Claim
34 words
The dispersion of claim 1, wherein the surfactant has at least one degradation product at a temperature greater that 100° C., and said degradation product or degredation products do not include siloxane redistribution catalysts.
Claim 15
Dependent Claim
11 words
The dispersion of claim 1, wherein the dispersion includes a filler.
Claim 16
Dependent Claim
13 words
The dispersion of claim 14, wherein the filler is an ammonium stabilized silica.
Claim 17
Dependent Claim
48 words
The dispersion of claim 1, wherein the dispersion has a crosslinked siloxane phase with a refractive index, and the dispersion also has a surfactant/residual water phase with a refractive index, and the refractive index of the crosslinked siloxane phase matches the refractive index of the surfactant/residual water phase.
Claim 18
Dependent Claim
73 words
The dispersion of claim 1, wherein the surfactant has the formula: R--B.sub.y --(CH.sub.2 CH.sub.2 O).sub.x where: R is hydrocarbon group having 8 to 18 carbon atoms with the --B y --(CH 2 CH 2 O) x attached either terminally or pendently to the hydrocarbon chain or R is a group having the formula: ##STR9## x is an integer from 5 to 15; and y is 1 or 0; B is C(O), or C(O)N--.
Claim 19
Dependent Claim
57 words
The dispersion of claim 1, wherein the surfactant has the formula: R--Z where: R is hydrocarbon group having 8 to 18 carbon atoms with the Z attached either terminally or pendently to the hydrocarbon chain, and Z is anionic hydrophilic group containing sulfate or sulfonate attached directly to the carbon or through taurate, isethionate, or succinate linkage.
Claim 20
Independent Claim
68 words
A method for making a crosslinked polysiloxane dispersion comprising the steps of: combining components comprising a siloxane polymer or polymer mixture having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s, a surfactant, water, and at least one self catalyzing crosslinker, mixing said components at a sufficiently high shear to transform the components into a gel phase, and optionally, diluting the gel phase with water.
Claim 21
Independent Claim
68 words
A method for making a crosslinked polysiloxane dispersion comprising the steps of: combining components comprising a siloxane polymer or polymer mixture having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s, a surfactant, water, and at least one self catalyzing crosslinker, mixing said components at a sufficiently high shear to transform the components into a gel phase, and optionally, diluting the gel phase with water.
Claim 22
Dependent Claim
23 words
The method of claim 19, wherein the polysiloxane dispersion has a silicone content of from 1% to 98% by weight of the composition.
Claim 23
Dependent Claim
23 words
The method of claim 19, wherein the polysiloxane dispersion has a silicone content of from 40% to 90% by weight of the composition.
Claim 24
Dependent Claim
28 words
The method of claim 19, wherein 1 to 10 parts by weight of surfactant is present in the emulsion per 100 parts of siloxane polymer or polymer mixture.
Claim 25
Dependent Claim
28 words
The method of claim 19, wherein 2 to 5 parts by weight of surfactant is present in the emulsion per 100 parts of siloxane polymer or polymer mixture.
Claim 26
Dependent Claim
28 words
The method of claim 19, wherein 3 to 30 parts by weight of water is present in the emulsion per 100 parts of siloxane polymer or polymer mixture.
Claim 27
Dependent Claim
24 words
The method of claim 19, wherein 6 to parts by weight of water is present per 100 parts of siloxane polymer or polymer mixture.
Claim 28
Dependent Claim
30 words
The method of claim 19, wherein 1 to 5 parts by weight of self catalyzing crosslinker is present in the emulsion per 100 parts of siloxane polymer or polymer mixture.
Claim 29
Dependent Claim
29 words
The method of claim 19, wherein the self catalyzing crosslinker has at least one catalytic leaving group selected from the group consisting of acetoxy, amide, aminoxy, acetamine and oxime.
Claim 30
Dependent Claim
45 words
The method of claim 19, wherein the self catalyzing crosslinker is ##STR10## where R is the same or different alkyl group having from 1 to 8 carbon atoms inclusive, and a is 0 or a positive integer, and b is an integer greater than 3.
Claim 31
Dependent Claim
37 words
The method of claim 19, comprising the additional step of adding before or after mixing, a stabilizer of the formula: ##STR11## where Me is a methyl group, and z is an integer from 3 to 40 inclusive.
Claim 32
Dependent Claim
34 words
The method of claim 19, comprising the additional step of adding prior to mixing an in situ resin reinforcer selected from the group consisting of methyltrimethoxy silane, vinyltrimethoxy silane, tetraethyl orthosilicate, and normal propylorthosilicate.
Claim 33
Dependent Claim
17 words
The method of claim 19, wherein the surfactant is not an alkyl sulfate, alkyl sulfonate, or taurate.
Claim 34
Dependent Claim
34 words
The method of claim 19, wherein the surfactant has at least one degradation product at a temperature greater that 100° C., and said degradation product or degredation products do not include siloxane redistribution catalysts.
Claim 35
Dependent Claim
18 words
The method of claim 19, comprising the additional step of adding a filler either before or after mixing.
Claim 36
Dependent Claim
13 words
The method of claim 33, wherein the filler is an ammonium stabilized silica.
Claim 37
Dependent Claim
48 words
The method of claim 19, wherein the dispersion has a crosslinked siloxane phase with a refractive index, and the dispersion also has a surfactant/residual water phase with a refractive index, and the refractive index of the crosslinked siloxane phase matches the refractive index of the surfactant/residual water phase.
Claim 38
Dependent Claim
73 words
The method of claim 19, wherein the surfactant has the formula: R--B.sub.y --(CH.sub.2 CH.sub.2 O).sub.x where: R is hydrocarbon group having 8 to 18 carbon atoms with the --B y --(CH 2 CH 2 O) x attached either terminally or pendently to the hydrocarbon chain or R is a group having the formula: ##STR12## x is an integer from 5 to 15; and y is 1 or 0; B is C(O), or C(O)N--.
Claim 39
Dependent Claim
57 words
The method of claim 19, wherein the surfactant has the formula: R--Z where: R is hydrocarbon group having 8 to 18 carbon atoms with the Z attached either terminally or pendently to the hydrocarbon chain, and Z is anionic hydrophilic group containing sulfate or sulfonate attached directly to the carbon or through taurate, isethionate, or succinate linkage.
Claim 40
Dependent Claim
14 words
The method of claim 19, wherein the dispersion is prepared in a batch process.
Claim 41
Dependent Claim
14 words
The method of claim 19, wherein the dispersion is prepared in a continuous process.
References Cited (Backward Citations)
US2441320A
Cited
US2676182A
Cited
US3382205A
Cited
US3355406A
Cited
US3661817A
Cited
US3714089A
Cited
US4147855A
Cited
DE2802170A1
Cited
BE877267A
Cited
US4356116A
Cited
US4468760A
Cited
US4707531A
Cited
US4788001A
Cited
US5034455A
Cited
US5037878A
Cited
US5145907A
Cited
US5045231A
Cited
US5070175A
Cited
EP0463431A2
Cited
US5175057A
Cited
DE4124588A1
Cited
EP0529547A1
Cited
EP0535687A1
Cited
JPH0598012A
Cited
WO1994009059A1
Cited
WO1994009058A1
Cited
JPH09323455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-06 | 2001-04-07 | 2001-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-06 | 2005-04-07 | 2005-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-06 | 2009-04-07 | 2009-10-07 | $7700.00 | Window Closed / Lapsed |