US3659896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive semi-cured sealing strip for automobile windshield
Assignee: ATK Launch Systems LLC
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Filing: 1970-03-17
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Granted: 1972-05-02
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Expires: 1990-03-17
Abstract
Abstract An automobile windshield mounting and sealing means is provided by means of a preformed, adhesive, curable sealing strip comprising a thiol terminated synthetic polymer, particularly a liquid polysulfide polymer, which has been made or modified, e.g. partially cured or blended to increase its molecular weight to at least about 13,000 and its viscosity at 25*C. to at least about 6,000 poises and which has been compounded with a mixture of fibrous and non-fibrous fillers, extenders, curing agent and other ingredients to form an extrudable, semi-cured, curable resilient polymeric sealing composition which is extruded to sealing strip form, which is substantially immediately functional as a windshield glass and the windshield receiving frame on an automobile body, and which further cures in the presence of atmospheric moisture under ambient room temperature and weather conditions in the windshield frame of an automobile to a moderately hard, strongly cohesive, resilient, strongly adhered sealing strip.
Inventors
- 👤 Daniel J Smith
- 👤 Elmer V O'-Grady
- 👤 Fred Walters
- 👤 Earl H Sorg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:35
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1025; C09K3/1028; B; B60; B60J; B60J10/00; B60J10/70; C03; C03C; C03C27/00; C03C27/04; C03C27/048; C08; C08K; C08K13/00; C08K13/02; C09K2200/00; C09K2200/02; C09K2200/0204; C09K2200/0208; C09K2200/0239; C09K2200/0278; C09K2200/0286; C09K2200/0291; C09K2200/04; C09K2200/0411; C09K2200/06; C09K2200/068; C09K2200/0682; C09K2200/0692; C09K2200/0695
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
A sealed structure as in claim 1 wherein the liquid polythiol-terminated polymer in the composition is a liquid polysulfide polymer represented by the formula HS(C2H4-OCH2-O-C2H4-SS)42-C2H4-OCH2-O-C2H4SH.
Claim 2
Dependent Claim
25 words
A sealed structure as in claim 1 wherein the liquid polythiol-terminated polymer in the composition is a liquid polysulfide polymer represented by the formula HS(C2H4-OCH2-O-C2H4-SS)23-C2H4-OCH2-O-C2H4SH.
Claim 3
Dependent Claim
53 words
A sealed structure as in claim 1 wherein the liquid polythiol-terminated polymer in the composition consists essentially of liquid polysulfide polymer having a molecular weight of from about 13,000 to about 15,000 and prepared by reacting dichloro diethyl formal with sodium polysulfide and using one-half mole percent of trichloropropane as a cross-linking agent.
Claim 4
Dependent Claim
24 words
A sealed structure as in claim 1 wherein the fibrous filler in the composition is selected from nylon, polyester, rayon, asbestos and glass fibers.
Claim 5
Dependent Claim
25 words
The sealed structure as in claim 1 wherein the liquid polythiol-terminated polymer is semi-cured by heating said polymer in the presence of semi-curing curing agents.
Claim 6
Dependent Claim
233 words
In a process for mounting and sealing glass windshield on an automobile body having a windshield receiving means which comprises a. priming the windshield receiving means with a primer solution for a coated metal surface, b. priming the periphery of the glass windshield on its inside facing surface with a primer solution for a glass surface, c. positioning and adhering a shaped semi-cured sealing strip based on a composition comprising the following ingredients in the following parts by weight: Liquid polythiol-terminated polymer 100 Extender-plasticizer 0 to 100 Precipitated CaCO3 0 to 300 Dry ground limestone 0 to 300 Fibrous filler 2 to 50 Carbon black 2 to 75 Curing agent for semi-curing 1 to 7 Curing agent for final curing 1 to 20 Adhesive additive 0 to 20 Desiccant 0 to 20 Ultraviolet light stabilizer 1 to 5 said liquid polythiol terminated polymer after semi-curing having a viscosity at 25* C. in the range from about 6,000 to 70, 000 poises and having a molecular weight of from about 13,000 to about 25,000 beTween said primed surfaces, d. and compressing said windshield and shaped semi-cured sealing strip against said windshield receiving means and automobile body, the improvement which comprieses using the semi-cured sealing strip substantially as an immediately functional sealing strip and windshield mount which continues to cure to a cured state after being adhered and compressed between said windshield and automobile body.
Claim 7
Dependent Claim
20 words
The process of claim 7 wherein the liquid polythiol-terminated polymer is a liquid polysulfide polymer represented by the formula HS(C2H4-OCH2-O-C2H4-SS)42-C2H4-OCH2-O-C2H4SH.
Claim 8
Dependent Claim
20 words
The process of claim 7 wherein the liquid polythiol-terminated polymer is a liquid polysulfide polymer represented by the formula HS(C2H4-OCH2-O-C2H4-SS)23-C2H4-OCH2-O-C2H4SH.
Claim 9
Dependent Claim
48 words
The process of claim 7 wherein the liquid polythiol-terminated polymer consists essentially of liquid polysulfide polymer having a molecular weight of from about 13,000 to about 15,000 and prepared by reacting dichloro diethyl formal with sodium polysulfide and using one-half mole percent of trichloropropane as a cross-linking agent.
Claim 10
Dependent Claim
19 words
The process of claim 7 wherein the fibrous filler is selected from nylon, polyester, rayon, asbestos and glass fibers.
Claim 11
Dependent Claim
24 words
The process as in claim 7 wherein the liquid polythiol-terminated polymer is semi-cured by heating said polymer in the presence of semi-curing curing agents.
References Cited (Backward Citations)
US3022870A
Cited
US3225017A
Cited
US3518211A
Cited
US3348351A
Cited
US3387416A
Cited
US3416833A
Cited
US3499864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |