Patent US3923736A successfully refreshed from Google Patents.
US3923736A
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Room temperature vulcanizable organopolysiloxanes
Assignee: Wacker Chemie AG
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Filing: 1973-09-13
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Granted: 1975-12-02
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Expires: 1993-09-13
Abstract
Abstract The invention relates to room temperature vulcanizable organopolysiloxane compositions which contain diorganopolysiloxanes having terminal groups capable of condensation with an amino-substituted organosilicon crosslinking compound containing at least three silicon-bonded amino groups of the formula NCH(CH3)C2H5 per molecule.
Inventors
- 👤 Siegfried Nitzsche
- 👤 Paul Hittmair
- 👤 Ernst Wohlfarth
- 👤 Eckhart Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/12; C08G77/14; C08G77/16; C08G77/18; C08G77/20; C08G77/22; C08G77/24; C08G77/26; C08G77/60; C08G77/62; C08G77/70
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
84 words
A ROOM TEMPERATURE VULCANIZABLE COMPOSITION WHICH IS OBTAINED BY ADMIXING IN THE SUBSTANTIAL ABSENCE OF MOISTURE AN ESSENTIALLY LINEAR DIORGANOPOLYSILOXANE HAVING TERMINAL GROUPS WHICH ARE CAPABLE OF CONDENSING WITH AN AMINO-SUBSTITUTED SILICON COMPOUND SELECTED FROM THE CLASS CONSISTING OF SILANES, SILAZANES AND SILOXANES HAVING AT LEAST THREE SILICONBONDED AMINO GROUPS OF THE FORMULA =NCH(CH3)C2H5 PER MOLECULE, SAID AMINO-SUBSTITUTED SILICON COMPOUND IS PRESENT IN AN AMOUNT OF AT LEAST 1 MOL PER GRAM EQUIVALENT OF THE TERMINAL GROUPS CAPABLE OF CONDENSATION PRESENT IN THE DIORGANOPOLYSILOXANE.
Claim 2
Dependent Claim
84 words
A ROOM TEMPERATURE VULCANIZABLE COMPOSITION WHICH IS OBTAINED BY ADMIXING IN THE SUBSTANTIAL ABSENCE OF MOISTURE AN ESSENTIALLY LINEAR DIORGANOPOLYSILOXANE HAVING TERMINAL GROUPS WHICH ARE CAPABLE OF CONDENSING WITH AN AMINO-SUBSTITUTED SILICON COMPOUND SELECTED FROM THE CLASS CONSISTING OF SILANES, SILAZANES AND SILOXANES HAVING AT LEAST THREE SILICONBONDED AMINO GROUPS OF THE FORMULA =NCH(CH3)C2H5 PER MOLECULE, SAID AMINO-SUBSTITUTED SILICON COMPOUND IS PRESENT IN AN AMOUNT OF AT LEAST 1 MOL PER GRAM EQUIVALENT OF THE TERMINAL GROUPS CAPABLE OF CONDENSATION PRESENT IN THE DIORGANOPOLYSILOXANE.
Claim 3
Dependent Claim
29 words
A method for preparing an elastomeric coated substrate which comprises applying the composition of claim 1 to the substrate and thereafter curing the composition in the presence of moisture.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein the diorganopolysiloxane has the general formula
Claim 5
Dependent Claim
25 words
The composition of claim 3 wherein some of the hydroxyl groups have been replaced by other groups which are capable of condensation with SiOH groups.
Claim 6
Dependent Claim
14 words
The composition of claim 3 wherein n is a number of at least 50.
Claim 7
Dependent Claim
33 words
The composition of claim 3 wherein at least 50 percent of the R radicals are methyl radicals and the remaining R radicals are selected from the class consisting of phenyl and vinyl radicals.
Claim 8
Dependent Claim
19 words
The composition of claim 3 wherein the diorganopolysiloxane has a viscosity of from 100 to 500,000 cs. at 25*C.
Claim 9
Dependent Claim
41 words
The composition of claim 1 wherein any unsatisfied silicon valences in the cross-linking organosilicon compound are satisfied by groups selected from the class consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals, cyanoalkyl radicals, Si-bonded hydroxyl groups and siloxane oxygen atoms.
Claim 10
Dependent Claim
46 words
The composition of claim 1 wherein the cross-linking organosilicon compound is a silane of the formula RaSi(NHCH(CH3)C2H5)4-a wherein R is selected from the class consisting of monvalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and cyanoalkyl radicals and a is a number of from 0 to 1.
Claim 11
Dependent Claim
17 words
The composition of claim 9 wherein the cross-linking organosilicon compound is a silane of the formula CH3Si(NHCH(CH3)C2H5)3
Claim 12
Dependent Claim
16 words
The composition of claim 1 wherein the cross-linking organosilicon compound is a silazane of the formula
Claim 13
Dependent Claim
47 words
The composition of claim 1 wherein the cross-linking organosilicon compound is a siloxane of the formula R3SiO(SiR2O)p(NHCH(CH3)C2H5)3 wherein R is selected from the class consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and cyanoalkyl radicals and p has a value of from 0 up to 20.
Claim 14
Dependent Claim
31 words
The composition of claim 1 wherein the cross-linking organosilicon compound is used in an amount of from 1 to 10 percent by weight based on the total weight of the composition.
Claim 15
Dependent Claim
31 words
The composition of claim 13 wherein the cross-linking organosilicon compound is used in an amount of from 2.5 to 7 percent by weight based on the total weight of the cmposition.
Claim 16
Dependent Claim
19 words
The composition of claim 1 wherein the reaction components are mixed at room temperature in the absence of moisture.
Claim 17
Independent Claim
83 words
A method for preparing a vulcanizable composition which comprises admixing in the absence of moisture an essentially linear diorganopolysiloxane having terminal groups which are capable of condensing with an amino-substituted silicon compound selected from the class consisting of silanes, silazanes and siloxanes having at least three silicon-bonded amino groups of the formula NCH(CH3)C2H5 per Molecule, said amino-substituted silicon compound is present in an amount of at least 1 mol per gram equivalent of the terminal groups capable of condensation present in the diorganopolysiloxane.
Claim 18
Independent Claim
83 words
A method for preparing a vulcanizable composition which comprises admixing in the absence of moisture an essentially linear diorganopolysiloxane having terminal groups which are capable of condensing with an amino-substituted silicon compound selected from the class consisting of silanes, silazanes and siloxanes having at least three silicon-bonded amino groups of the formula NCH(CH3)C2H5 per Molecule, said amino-substituted silicon compound is present in an amount of at least 1 mol per gram equivalent of the terminal groups capable of condensation present in the diorganopolysiloxane.
Claim 19
Dependent Claim
12 words
The method of claim 16 wherein the diorganopolysiloxane has the general formula
Claim 20
Dependent Claim
19 words
The method of claim 16 wherein the diorganopolysiloxane has a viscosity of from 100 to 500,000 cs. at 25*C.
Claim 21
Dependent Claim
52 words
The method of claim 16 wherein the terminal groups of the diorganopolysiloxane are selected from the class consisting of hydroxyl radicals, oximo radicals, alkoxy radicals, radicals of the formula RNH-and hydrogen atoms, in which R is selected from the class consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and cyanoalkyl radicals.
Claim 22
Dependent Claim
26 words
The method of claim 16 wherein the amino-substituted silicon compound is selected from the class consisting of silanes of the formula RaSi(NHCH(CH3)C2H5))4-a, silazanes of the formula
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |