Patent US4552919A successfully refreshed from Google Patents.
US4552919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room temperature-curable polyorganosiloxane composition whose cured products resist soiling
Assignee: DuPont Toray Specialty Materials KK
•
Filing: 1984-06-25
•
Granted: 1985-11-12
•
Expires: 2004-06-25
Abstract
Abstract A cured product which resists soiling under outdoor exposure obtained from a mixture of a silanol containing polyorganosiloxane having at least one silicon-bonded oxyalkylene radical of the formula -R1O(R2O)nR3 and a curing agent.
Inventors
- 👤 Ryuzo Mikami
- 👤 Toshio Saruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:34
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08L83/12; C08G; C08G77/00; C08G77/42; C08G77/46; C08L83/04; C08L83/06; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A room temperature-curable polyorganosiloxane composition consisting essentially of (A) a polyorganosiloxane which possesses at least one silicon-bonded oxyalkylene radical of the general formula --R 1 O(R 2 O) n R 3 wherein each R 1 and R 2 represent a divalent alkylene radical, R 3 is a radical selected from alkyl, acyl, and hydrogen and n is 0 or an integer with a value ≧1, and said polyorganosiloxane having at least 2 silanol groups per molecule and (B) a curing agent.
Claim 2
Dependent Claim
81 words
A room temperature-curable polyorganosiloxane composition consisting essentially of (A) a polyorganosiloxane which possesses at least one silicon-bonded oxyalkylene radical of the general formula --R 1 O(R 2 O) n R 3 wherein each R 1 and R 2 represent a divalent alkylene radical, R 3 is a radical selected from alkyl, acyl, and hydrogen and n is 0 or an integer with a value ≧1, and said polyorganosiloxane having at least 2 silanol groups per molecule and (B) a curing agent.
Claim 3
Dependent Claim
12 words
The composition according to claim 1 in which there is filler present.
Claim 4
Dependent Claim
14 words
The composition according to claim 2 in which the curing agent is an aminoxysiloxane.
Claim 5
Dependent Claim
13 words
The composition according to claim 3 in which the filler is calcium carbonate.
Claim 6
Dependent Claim
29 words
The composition according to claim 4 in which the aminoxysiloxane is a mixture of aminoxysiloxane having two aminoxy groups per molecule and aminoxysiloxane having three aminoxy groups per molecule.
Claim 7
Dependent Claim
20 words
The composition according to claim 2 in which the curing agent is a mixture of ketoximosilane and a tin catalyst.
Claim 8
Dependent Claim
13 words
The composition according to claim 6 in which the filler is calcium carbonate.
Claim 9
Dependent Claim
18 words
The composition according to claim 7 in which the oximosilane is methyltris(methylethylketoximo)silane and the tin catalyst is dibutyltindioctoate.
Claim 10
Dependent Claim
20 words
The composition according to claim 2 in which the curing agent is a mixture of alkoxysilane and a titanium catalyst.
Claim 11
Dependent Claim
13 words
The composition according to claim 9 in which the filler is fumed silica.
Claim 12
Dependent Claim
18 words
The composition according to claim 10 in which the alkoxysilane is vinyltrimethoxysilane and the titanium catalyst is tetrabutyltitanate.
Claim 13
Dependent Claim
21 words
The composition according to claim 1 in which the curing agent is a mixture of an acetoxysilane and a tin catalyst.
Claim 14
Dependent Claim
18 words
The composition according to claim 12 in which the acetoxysilane is ethyltriacetoxysilane and the tin catalyst is dibutyltindiacetate.
Claim 15
Dependent Claim
16 words
The composition according to claim 1 stored in a container sealed against the entry of moisture.
Claim 16
Dependent Claim
12 words
The product obtained by exposing the composition of claim 14 to moisture.
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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |