US4075154A
Expired / Lapsed
US
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Room-temperature curing organopolysiloxane compositions
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1977-05-16
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Granted: 1978-02-21
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Expires: 1997-05-16
Abstract
Abstract Improved organopolysiloxane compositions curable at room temperature into rubber-like elastomers comprising A. a hydroxy-terminated diorganopolysiloxane, B. a substituted-aminoxy group containing organopolysiloxane, C. a salt of a metal, such as, calcium, zinc, aluminum, tin and iron, and D. an inorganic filler, such as, calcium carbonate, magnesium hydroxycarbonate and calcium hydroxide, having a basicity sufficient to compensate for the acidity of component c). The compositions exhibit uniform curability throughout the depth of the mass of the composition, even at relatively high temperatures.
Inventors
- 👤 Kunio Itoh
- 👤 Toshio Takago
- 👤 Tamio Sato
- 👤 Hisashi Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:03
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/01; C08K3/013; C08K3/18; C08K3/24; C08K5/00; C08K5/04; C08K5/09; C08K5/54; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/20; C08G77/22; C08G77/24; C08G77/26; C08G77/70
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
149 words
A room-temperature curing organopolysiloxane composition comprising a. 100 parts by weight of a diorganopolysiloxane terminated at both chain ends with hydroxy groups directly bonded to the terminal silicon atoms, b. from 0.1 to 30 parts by weight of a nitrogen-containing organosilicon compound having substituted aminoxy groups represented by the general formula ##STR11## where R 1 and R 2 are each the same or different monovalent hydrocarbon groups or by the general formula ##STR12## where R 3 is a divalent organic group, such aminoxy groups being at least 2.01 per molecule in number on an average, c. from 0.05 to 10 parts by weight of a salt of a metal selected from the metallic elements belonging to the second, third, fourth and eighth groups in the Periodic Table having at least one inorganic counter anion, and d. from 1 to 200 parts by weight of an inorganic filler with basicity.
Claim 2
Dependent Claim
149 words
A room-temperature curing organopolysiloxane composition comprising a. 100 parts by weight of a diorganopolysiloxane terminated at both chain ends with hydroxy groups directly bonded to the terminal silicon atoms, b. from 0.1 to 30 parts by weight of a nitrogen-containing organosilicon compound having substituted aminoxy groups represented by the general formula ##STR11## where R 1 and R 2 are each the same or different monovalent hydrocarbon groups or by the general formula ##STR12## where R 3 is a divalent organic group, such aminoxy groups being at least 2.01 per molecule in number on an average, c. from 0.05 to 10 parts by weight of a salt of a metal selected from the metallic elements belonging to the second, third, fourth and eighth groups in the Periodic Table having at least one inorganic counter anion, and d. from 1 to 200 parts by weight of an inorganic filler with basicity.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the inorganic counter anion is selected from the group consisting of chloride, sulfate, nitrate, hydroxide, and borate.
Claim 4
Dependent Claim
45 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said diorganopolysiloxane is an organopolysiloxane expressed by the average unit formula R.sub.a SiO.sub.(4-a)/2 where R is a substituted or unsubstituted monovalent hydrocarbon group and a is a positive number from 1.90 to 2.05 inclusive.
Claim 5
Dependent Claim
39 words
The room-temperature curing organopolysiloxane composition as claimed in claim 3 wherein said substituted or unsubstituted monovalent hydrocarbon group is selected from the class consisting of alkyl, alkenyl, cycloalkyl, aryl and aralkyl groups and halogen- or cyano-substituted groups corresponding thereto.
Claim 6
Dependent Claim
22 words
The room-temperature curing organopolysiloxane composition as claimed in claim 3 wherein said substituted or unsubstituted monovalent hydrocarbon group is a methyl group.
Claim 7
Dependent Claim
23 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said diorganopolysiloxane has a viscosity higher than 300 centipoise at 25° C.
Claim 8
Dependent Claim
23 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said diorganopolysiloxane has a viscosity higher than 1,000 centipoise at 25° C.
Claim 9
Dependent Claim
27 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said diorganopolysiloxane has a viscosity in the range from 1,000 to 10,000 centipoise at 25° C.
Claim 10
Dependent Claim
32 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said R 1 and R 2 groups are each selected from the class consisting of methyl, ethyl, propyl and phenyl groups.
Claim 11
Dependent Claim
30 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said R 3 group is selected from the class consisting of the groups expressed by the following formulas: ##STR13##
Claim 12
Dependent Claim
29 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said component (b) is an organopolysiloxane having at least 2 organosiloxane units expressed by the following formula: ##STR14##
Claim 13
Dependent Claim
27 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said metallic element is selected from the class consisting of calcium, zinc, aluminum, tin and iron.
Claim 14
Dependent Claim
34 words
The room-temperature curing organopolysiloxane composition as claimed in claim 1 wherein said inorganic filler with basicity is selected from the class consisting of calcium carbonate, magnesium hydroxycarbonate, aluminum hydroxide, calcium hydroxide and zinc hydroxycarbonate.
Claim 15
Dependent Claim
114 words
A room-temperature curing organopolysiloxane composition which comprises a. 100 parts by weight of a dimethylpolysiloxane terminated at both chain ends with hydroxy groups directly bonded to the terminal silicon atoms and having a viscosity in the range from 1,000 to 10,000 centipoise at 25° C, b. from 1 to 100 parts by weight of an organopolysiloxane having at least 3 organopolysiloxane units expressed by the formula ##STR15## in a molecule, c. from 0.1 to 5 parts by weight of a metal salt selected from the class consisting of halides, sulfates, nitrates, borates and basic carboxylates of calcium, zinc, aluminum, tin or iron, and d. from 30 to 100 parts by weight of calcium carbonate.
Claim 16
Dependent Claim
114 words
A room-temperature curing organopolysiloxane composition which comprises a. 100 parts by weight of a dimethylpolysiloxane terminated at both chain ends with hydroxy groups directly bonded to the terminal silicon atoms and having a viscosity in the range from 1,000 to 10,000 centipoise at 25° C, b. from 1 to 100 parts by weight of an organopolysiloxane having at least 3 organopolysiloxane units expressed by the formula ##STR15## in a molecule, c. from 0.1 to 5 parts by weight of a metal salt selected from the class consisting of halides, sulfates, nitrates, borates and basic carboxylates of calcium, zinc, aluminum, tin or iron, and d. from 30 to 100 parts by weight of calcium carbonate.
Claim 17
Dependent Claim
135 words
A room-temperature curing organopolysiloxane composition which comprises a. 100 parts by weight of a dimethylpolysiloxane terminated at both chain ends with hydroxy groups directly bonded to the terminal silicon atoms and having a viscosity in the range from 1,000 to 10,000 centipoise at 25° C, b. from 1 to 10 parts by weight of a mixture of organopolysiloxanes having at least 2 organosiloxane units expressed by the formula ##STR16## in a molecule, of which mixture the number of the same organopolysiloxane units is at least 2.01 per molecule on an average, c. from 0.1 to 5 parts by weight of a metal salt selected from the class consisting of halides, sulfates, nitrates, borates and basic carboxylates of calcium, zinc, aluminum, tin or iron, and d. from 30 to 100 parts by weight of calcium carbonate.
Claim 18
Dependent Claim
135 words
A room-temperature curing organopolysiloxane composition which comprises a. 100 parts by weight of a dimethylpolysiloxane terminated at both chain ends with hydroxy groups directly bonded to the terminal silicon atoms and having a viscosity in the range from 1,000 to 10,000 centipoise at 25° C, b. from 1 to 10 parts by weight of a mixture of organopolysiloxanes having at least 2 organosiloxane units expressed by the formula ##STR16## in a molecule, of which mixture the number of the same organopolysiloxane units is at least 2.01 per molecule on an average, c. from 0.1 to 5 parts by weight of a metal salt selected from the class consisting of halides, sulfates, nitrates, borates and basic carboxylates of calcium, zinc, aluminum, tin or iron, and d. from 30 to 100 parts by weight of calcium carbonate.
References Cited (Backward Citations)
US3341486A
Cited
US3359237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |