US3984369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealant
Assignee: Shell USA Inc
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Filing: 1975-05-15
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Granted: 1976-10-05
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Expires: 1995-05-15
Abstract
Abstract Sealant compositions exhibiting good substrate/sealant adhesion comprise 3 to 30 percent by weight of a block copolymer, 2 to 40 percent by weight butyl rubber, 10 to 70 percent by weight of a plasticizing oil having a solubility parameter ranging from 6 to 8, about 1 to about 50 percent by weight of an adhesion promoting resin having a solubility parameter ranging from about 8 to about 12, about 1 to about 70 percent by weight of an inorganic filler and about 0.01 to about 2.0 percent by weight of a UV/oxidation stabilizer or a mixture of UV/oxidation stabilizers.
Inventors
- 👤 James T. Harlan, Jr.
- 👤 David J. St. Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:09
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09J; C09J153/00; C09J153/02; C09J153/025; C08; C08L; C08L2666/00; C08L2666/02; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/06; C09K2200/0607; C09K2200/061; C09K2200/0642
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
231 words
An improvement in the method for making a sealant composition, said sealant comprising: A. about 3 to 30 percent by weight of an elastomeric poly(alpha-monoalkenyl arene)/hydrogenated poly(conjugated diene) block copolymer having at least two poly(alpha-monoalkenyl arene) blocks wherein the average molecular weight of the arene blocks is 4,000 to 50,000; the average molecular weight of the diene block is 18,000 to 250,000; the conjugated diene blocks contain at least 20% 1,2 bonds prior to hydrogenation; and at least 98% of the double bonds present in the conjugated diene blocks are saturated during hydrogenation, B. about 2 to 40 percent by weight of a butyl rubber, C. about 1 to about 70 percent by weight of an oil having a solubility parameter of from about 6 to about 8, D. about 1 to about 50 percent by weight of an adhesion promoting resin having a solubility parameter of from about 8 to about 12, E. about 0 to about 70 percent by weight of an inorganic filler, and F. about 0.01 to about 2.0 percent by weight of an oxidation stabilizer, which improvement comprises adding the components to a batch mixer in the following order: a. block copolymer, butyl rubber, about 1/3 of the oil and stabilizer; b. adhesive promoting resin; c. about one half of the filler; d. the remaining portion of the filler; e. the remaining portion of the oil.
Claim 2
Dependent Claim
231 words
An improvement in the method for making a sealant composition, said sealant comprising: A. about 3 to 30 percent by weight of an elastomeric poly(alpha-monoalkenyl arene)/hydrogenated poly(conjugated diene) block copolymer having at least two poly(alpha-monoalkenyl arene) blocks wherein the average molecular weight of the arene blocks is 4,000 to 50,000; the average molecular weight of the diene block is 18,000 to 250,000; the conjugated diene blocks contain at least 20% 1,2 bonds prior to hydrogenation; and at least 98% of the double bonds present in the conjugated diene blocks are saturated during hydrogenation, B. about 2 to 40 percent by weight of a butyl rubber, C. about 1 to about 70 percent by weight of an oil having a solubility parameter of from about 6 to about 8, D. about 1 to about 50 percent by weight of an adhesion promoting resin having a solubility parameter of from about 8 to about 12, E. about 0 to about 70 percent by weight of an inorganic filler, and F. about 0.01 to about 2.0 percent by weight of an oxidation stabilizer, which improvement comprises adding the components to a batch mixer in the following order: a. block copolymer, butyl rubber, about 1/3 of the oil and stabilizer; b. adhesive promoting resin; c. about one half of the filler; d. the remaining portion of the filler; e. the remaining portion of the oil.
Claim 3
Dependent Claim
14 words
The method of claim 1 where A is a polystyrene/hydrogenated polybutadiene/polystyrene linear block copolymer.
Claim 4
Dependent Claim
29 words
The method of claim 2 where B is an isobutylene-isoprene copolymer with a Mooney viscosity of from about 35 to about 55 ML cone after 8 minutes at 100°C.
Claim 5
Dependent Claim
14 words
The method of claim 3 where C is low molecular weight polybutene oligomer oil.
Claim 6
Dependent Claim
12 words
The method of claim 4 where D is a terpene phenolic resin.
Claim 7
Dependent Claim
18 words
The method of claim 5 where E is a mixture of CaCO 3 , TiO 2 and ZnO.
Claim 8
Dependent Claim
17 words
The method of claim 6 where F is a mixture of tetrakis-[methylene-(3,5-di-tertiary-butyl-4-hydroxy-hydrocinnamate)]methane, bisphenol epoxides, and, 2,2'thio-bis-(4-tertiaryoctylphenolate)-n-butylamine nickel(II).
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |