US3971751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable silylether terminated polymer
Assignee: Kanegafuchi Chemical Industry Co Ltd
•
Filing: 1975-06-09
•
Granted: 1976-07-27
•
Expires: 1995-06-09
Abstract
Abstract A composition comprising a polyether having silicon end group, which composition is changeable to a rubber-like substance upon exposure to atmospheric moisture at room temperature.
Inventors
- 👤 Katsuhiko Isayama
- 👤 Itaru Hatano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:19
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/336; C08G65/26; C08G65/2603; C08G65/2606; C08G65/321; C08G65/337; C08G77/00; C08G77/48; C08G77/50
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
175 words
A composition comprising a polyether consisting essentially of chemically combined units of the formula --R III --O--, having a molecular weight of between 500 to 15,000, and terminal silylether groups of the formula ##EQU19## wherein R I is an alkyl or aryl radical having from 1 to 12 carbon atoms, --R II --, is a member selected from the group consisting of --CH 2 --, ##SPC5## ##SPC6## and --R'--OCH 2 --, wherein R' is a divalent hydrocarbon radical having 1 to 12 carbon atoms and selected from the group consisting of alkylene radicals, cycloalkylene radicals, arylene radicals and aralkylene radicals; --R-- is a divalent alkylene radical selected from the group consisting of --CH 2 CH 2 --, ##EQU20## and --CH 2 CH 2 CH 2 CH 2 --, X is a member selected from the class consisting of halogen radicals, alkoxy radicals, acyloxy radicals, ketoximato radicals, amino radicals, amide radicals and mercaptide radicals; a is a whole number equal to 0, 1 or 2 and b is a whole number equal to 0 to 1.
Claim 2
Dependent Claim
175 words
A composition comprising a polyether consisting essentially of chemically combined units of the formula --R III --O--, having a molecular weight of between 500 to 15,000, and terminal silylether groups of the formula ##EQU19## wherein R I is an alkyl or aryl radical having from 1 to 12 carbon atoms, --R II --, is a member selected from the group consisting of --CH 2 --, ##SPC5## ##SPC6## and --R'--OCH 2 --, wherein R' is a divalent hydrocarbon radical having 1 to 12 carbon atoms and selected from the group consisting of alkylene radicals, cycloalkylene radicals, arylene radicals and aralkylene radicals; --R-- is a divalent alkylene radical selected from the group consisting of --CH 2 CH 2 --, ##EQU20## and --CH 2 CH 2 CH 2 CH 2 --, X is a member selected from the class consisting of halogen radicals, alkoxy radicals, acyloxy radicals, ketoximato radicals, amino radicals, amide radicals and mercaptide radicals; a is a whole number equal to 0, 1 or 2 and b is a whole number equal to 0 to 1.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the polyether is a propylene polyether having a molecular weight between 3,000 to 12,000.
Claim 4
Dependent Claim
18 words
The composition of claim 1, wherein X is a radical of alkoxy radical, acyloxy radical or ketoximato radical.
Claim 5
Dependent Claim
27 words
The composition of claim 2, wherein the alkoxy radical a member selected from the group consisting of CH 3 O--, ##EQU21## and ClCH 2 CH 2 O--.
Claim 6
Dependent Claim
12 words
The composition of claim 1, wherein R II is --CH 2 --.
Claim 7
Dependent Claim
13 words
The composition of claim 1, wherein said polyether is admixed with a filler.
Claim 8
Dependent Claim
30 words
The composition of claim 6, wherein said filler is selected from the group consisting of silica aerogel, carbon black, calcium carbonate, titanium oxide, zinc oxide and mixtures of the foregoing.
Claim 9
Dependent Claim
27 words
The composition of claim 1, wherein said polyether is admixed with a silanol condensation catalyst in an amount sufficient to cure said composition upon exposure to moisture.
Claim 10
Dependent Claim
13 words
The composition of claim 8, wherein said polyether is admixed with a filler.
Claim 11
Dependent Claim
14 words
The composition of claim 9, wherein said polyether is further admixed with a plasticizer.
Claim 12
Dependent Claim
8 words
The composition of claim 1 subjected to curing.
Claim 13
Dependent Claim
8 words
The composition of claim 2, subjected to curing.
Claim 14
Dependent Claim
8 words
The composition of claim 3, subjected to curing.
Claim 15
Dependent Claim
8 words
The composition of claim 4, subjected to curing.
Claim 16
Dependent Claim
8 words
The composition of claim 5, subjected to curing.
Claim 17
Dependent Claim
8 words
The composition of claim 6, subjected to curing.
Claim 18
Dependent Claim
8 words
The composition of claim 7, subjected to curing.
Claim 19
Dependent Claim
8 words
The composition of claim 8, subjected to curing.
Claim 20
Dependent Claim
8 words
The composition of claim 9, subjected to curing.
Claim 21
Dependent Claim
8 words
The composition of claim 10, subjected to curing.
References Cited (Backward Citations)
US3159662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |