US4425389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-applicable and hardenable sealing compositions and its use
Assignee: Rain Carbon Germany GmbH
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Filing: 1982-08-16
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Granted: 1984-01-10
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Expires: 2002-08-16
Abstract
Abstract A polysulfide sealing composition is described which contains, in addition to the hardening agents and optional fillers, softeners and other conventional additives, a mixture of a solid polysulfide rubber with terminal SH groups and a liquid polysulfide polymer with terminal SH groups, wherein the weight ratio of the respective solid and liquid polysulfide is 100:5 to 15. The composition may be used for the manufacture of insulating glass units.
Inventors
- 👤 Wolf-Dietrich Schollhorn
- 👤 Lothar Hockenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:05
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A heat-applicable and hardenable polysulfide sealing composition comprising a mixture of a solid polysulfide rubber of the formula: HS-R-S-(S-R-S).sub.n -S-R-SH wherein R is lower alkyl or alkyl ether, n is 300 to 1,000 and the average molecular weight ranges from 50,000 to 200,000 and a liquid polysulfide polymer having the same formula but wherein n is 6 to 25 and the average molecular weight ranges from about 800 to 4,000, the weight ratio of solid polysulfide to liquid polysulfide being 100:5 to 15, and a sufficient amount of a hardening agent to achieve a hardened state upon being subjected to a sufficiently elevated temperature.
Claim 2
Dependent Claim
104 words
A heat-applicable and hardenable polysulfide sealing composition comprising a mixture of a solid polysulfide rubber of the formula: HS-R-S-(S-R-S).sub.n -S-R-SH wherein R is lower alkyl or alkyl ether, n is 300 to 1,000 and the average molecular weight ranges from 50,000 to 200,000 and a liquid polysulfide polymer having the same formula but wherein n is 6 to 25 and the average molecular weight ranges from about 800 to 4,000, the weight ratio of solid polysulfide to liquid polysulfide being 100:5 to 15, and a sufficient amount of a hardening agent to achieve a hardened state upon being subjected to a sufficiently elevated temperature.
Claim 3
Dependent Claim
19 words
The sealing composition as in claim 1, wherein p-quinone dioxime and zinc oxide is used as the hardening agent.
Claim 4
Dependent Claim
16 words
The sealing composition as in claim 1, wherein zinc peroxide is used as the hardening agent.
Claim 5
Dependent Claim
22 words
The sealing composition of claim 1, wherein at least one of a filler, plasticizer, adhesive agent, dyestuff, accelerator or retarder is present.
Claim 6
Dependent Claim
15 words
The sealing composition of claim 1, wherein R is: --CH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 --.
Claim 7
Dependent Claim
94 words
An insulating glass unit comprising two glass panes set into a circumferential frame and secured in said frame by a sealing composition formed from a mixture comprising a solid polysulfide rubber of the formula: HS-R-S-(S-R-S).sub.n -S-R-SH wherein R is lower alkyl or alkyl ether, n is 300 to 1,000 and the average molecular weight ranges from 50,000 to 200,000 and a liquid polysulfide polymer having the same formula but wherein n is 6 to 25 and the average molecular weight ranges from about 800 to 4,000, in a weight ratio of 100:5 to 15.
Claim 8
Dependent Claim
94 words
An insulating glass unit comprising two glass panes set into a circumferential frame and secured in said frame by a sealing composition formed from a mixture comprising a solid polysulfide rubber of the formula: HS-R-S-(S-R-S).sub.n -S-R-SH wherein R is lower alkyl or alkyl ether, n is 300 to 1,000 and the average molecular weight ranges from 50,000 to 200,000 and a liquid polysulfide polymer having the same formula but wherein n is 6 to 25 and the average molecular weight ranges from about 800 to 4,000, in a weight ratio of 100:5 to 15.
Claim 9
Dependent Claim
62 words
A process of producing an insulating glass unit comprising arranging two glass panes in a circumferential frame and securing said panes in the frame by spraying therein at a temperature of from about 50° to about 100° C., a mixture as defined in claim 1, and thereafter heating to cure the mixture at a temperature of about 140° C. to 160° C.
References Cited (Backward Citations)
US3316194A
Cited
US4165425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |