Patent US4184880A successfully refreshed from Google Patents.
US4184880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polysiloxane emulsions with mica treated with organosilicon compound
Assignee: Wacker Chemie AG
•
Filing: 1977-07-28
•
Granted: 1980-01-22
•
Expires: 1997-07-28
Abstract
Abstract Aqueous diorganopolysiloxane emulsions containing dispersed inorganic silicates which have been treated with an organosilicon compound to impart hydrophobic properties thereto. The resultant dispersions may be employed as release agents especially in molding tires.
Inventors
- 👤 Peter Huber
- 👤 Jurgen Meusel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:59
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C; C08; C08K; C08K5/00; C08K9/00; C08K9/04; C08K9/06; C10; C10M; C10M2201/00; C10M2201/02; C10M2201/10; C10M2201/102; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/107; C10M2209/12; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/05; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
An aqueous emulsion containing a diorganopolysiloxane having a viscosity of at least 1000 cP at 25° C. and having mica dispersed therein which has a particle size of from 0.02 to 0.25 mm, said mica having been treated with an organosilicon compound selected from the class consisting of octamethylcyclotetrasiloxane, hydroxyl-terminated dimethylpolysiloxanes having from 2 to 12 siloxane units per molecule and silicon compounds having the formula (R.sub.3 Si).sub.a Z and R.sub.a' SiZ'.sub.4-a' in which R is selected from the class consisting of monovalent hydrocarbon radicals having from 1 to 18 carbon atoms and halogenated hydrocarbon radicals, Z and Z' are radicals selected from the class consisting of halogen, hydrogen, --OH, --OR', --NR'X, --ONR', --SR', --OOCR' and when a is 2, then Z is also selected from the class consisting of --O--, ═NX and --S--, R' is selected from the class consisting of a hydrocarbon radical and a substituted hydrocarbon radical, X is selected from the class consisting of hydrogen and R', a is 1 or 2 and a' is 1, 2 or 3.
Claim 2
Dependent Claim
173 words
An aqueous emulsion containing a diorganopolysiloxane having a viscosity of at least 1000 cP at 25° C. and having mica dispersed therein which has a particle size of from 0.02 to 0.25 mm, said mica having been treated with an organosilicon compound selected from the class consisting of octamethylcyclotetrasiloxane, hydroxyl-terminated dimethylpolysiloxanes having from 2 to 12 siloxane units per molecule and silicon compounds having the formula (R.sub.3 Si).sub.a Z and R.sub.a' SiZ'.sub.4-a' in which R is selected from the class consisting of monovalent hydrocarbon radicals having from 1 to 18 carbon atoms and halogenated hydrocarbon radicals, Z and Z' are radicals selected from the class consisting of halogen, hydrogen, --OH, --OR', --NR'X, --ONR', --SR', --OOCR' and when a is 2, then Z is also selected from the class consisting of --O--, ═NX and --S--, R' is selected from the class consisting of a hydrocarbon radical and a substituted hydrocarbon radical, X is selected from the class consisting of hydrogen and R', a is 1 or 2 and a' is 1, 2 or 3.
Claim 3
Dependent Claim
65 words
The aqueous diorganopolysiloxane emulsion of claim 1, wherein the mica has been treated with an organosilane having the general formula: R.sub.a'.sup.1 SiOR.sub.4-a'.sup.2 in which R 1 is a hydrocarbon radical having from 1 to 18 carbon atoms, R 2 is selected from the class consisting of alkyl radicals having from 1 to 4 carbon atoms and methoxyethylene radicals and a' is 1, 2 or 3.
Claim 4
Dependent Claim
34 words
The aqueous diorganopolysiloxane emulsion of claim 1, wherein the mica has been treated with an organosilicon compound at the rate of 0.1 to 10 percent by weight, based on the weight of the mica.
Claim 5
Dependent Claim
249 words
An aqueous dispersion containing: 2 to 25 percent by weight of a diorganopolysiloxane having a viscosity of at least 1000 cP at 25° C. 20 to 60 percent by weight of mica having a particle size of from 0.02 to 0.25 mm which has been treated with an organosilicon compound selected from the class consisting of octamethylcyclotetrasiloxane, hydroxyl-terminated dimethylpolysiloxanes having from 2 to 12 siloxane units per molecule and silicon compounds having the formula (R.sub.3 Si).sub.a Z and R.sub.a', SiZ'.sub.4-a' in which R is selected from the class consisting of monovalent hydrocarbon radicals having from 1 to 18 carbon atoms and halogenated hydrocarbon radicals, Z and Z' are radicals selected from the class consisting of halogen, hydrogen, --OH, --OR', --NR'X, --ONR', --SR', --OOCR' and when a is 2, then Z is also selected from the class consisting of --O--, ═NX and and --S--, R' is selected from the class consisting of a hydrocarbon radical and a substituted hydrocarbon radical, X is selected from the class consisting of hydrogen and R', a is 1 or 2 and a' is 1, 2 or 3, 0.10 to 5.0 percent by weight of a dispersing agent 0 to 25 percent by weight of lubricants other than the mica and diorganopolysiloxane 0.01 to 1.5 percent by weight of a thickening agent 0.01 to 1.0 percent by weight of a bactericide and at least 20 percent by weight of water, in which the percent by weight is based on the total weight of the dispersion.
Claim 6
Dependent Claim
249 words
An aqueous dispersion containing: 2 to 25 percent by weight of a diorganopolysiloxane having a viscosity of at least 1000 cP at 25° C. 20 to 60 percent by weight of mica having a particle size of from 0.02 to 0.25 mm which has been treated with an organosilicon compound selected from the class consisting of octamethylcyclotetrasiloxane, hydroxyl-terminated dimethylpolysiloxanes having from 2 to 12 siloxane units per molecule and silicon compounds having the formula (R.sub.3 Si).sub.a Z and R.sub.a', SiZ'.sub.4-a' in which R is selected from the class consisting of monovalent hydrocarbon radicals having from 1 to 18 carbon atoms and halogenated hydrocarbon radicals, Z and Z' are radicals selected from the class consisting of halogen, hydrogen, --OH, --OR', --NR'X, --ONR', --SR', --OOCR' and when a is 2, then Z is also selected from the class consisting of --O--, ═NX and and --S--, R' is selected from the class consisting of a hydrocarbon radical and a substituted hydrocarbon radical, X is selected from the class consisting of hydrogen and R', a is 1 or 2 and a' is 1, 2 or 3, 0.10 to 5.0 percent by weight of a dispersing agent 0 to 25 percent by weight of lubricants other than the mica and diorganopolysiloxane 0.01 to 1.5 percent by weight of a thickening agent 0.01 to 1.0 percent by weight of a bactericide and at least 20 percent by weight of water, in which the percent by weight is based on the total weight of the dispersion.
References Cited (Backward Citations)
US3023181A
Cited
US2857355A
Cited
US2881146A
Cited
US3324074A
Cited
US3877956A
Cited
US3713851A
Cited
US3817894A
Cited
US3905823A
Cited
US3941864A
Cited
US3872038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |