US4189418A
Expired / Lapsed
US
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Can end sealing rubber composition containing a styrene-butadiene rubbery copolymer, a tackifier and a filler
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1977-12-07
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Granted: 1980-02-19
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Expires: 1997-12-07
Abstract
Abstract A can end sealing rubber composition (A) consisting essentially of a styrene-butadiene rubbery copolymer, a tackifier and a filler, and (B) having (1) a creep resistance coefficient K defined by the following equation of at least 0.1 but not exceeding 0.6, K=log J.sub.90.sup.C (10)-log J.sub.90.sup.C (1) wherein J 90 C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90° C. by a parallel plate plastometer, and J 90 C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90° C. by a parallel plate plastomer, and (2) a creep compliance J 25 C (1) of at least 3×10 -9 cm 2 /dyne but not exceeding 1×10 -6 cm 2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25° C. by a parallel plate plastometer.
Inventors
- 👤 Hiroshi Ueno
- 👤 Shunji Kojima
- 👤 Masanori Aizawa
- 👤 Akira Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:21
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C09; C09K; C09K3/00; C09K3/10; C09K2200/00; C09K2200/02; C09K2200/0204; C09K2200/0208; C09K2200/0239; C09K2200/0243; C09K2200/0252; C09K2200/06; C09K2200/0602; C09K2200/0607; C09K2200/0687
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A can end sealing rubber composition (A) consisting essentially of a styrene-butadiene rubbery copolymer latex obtained by emulsion polymerization at 35° to 70° C., a tackifier and a filler, and (B) having (1) a creep resistance coefficient K defined by the following equation of at least 0.1 but not exceeding 0.6, K=log J.sub.90.sup.C (10)-log J.sub.90.sup.C (1) wherein J 90 C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90° C. by a parallel plate plastometer, and J 90 C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90° C. by a parallel plate plastometer, and (2) a creep compliance J 25 C (1) of at least 3×10 -9 cm 2 /dyne but not exceeding 1×10 -6 cm 2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25° C. by a parallel plate plastomer.
Claim 2
Dependent Claim
176 words
A can end sealing rubber composition (A) consisting essentially of a styrene-butadiene rubbery copolymer latex obtained by emulsion polymerization at 35° to 70° C., a tackifier and a filler, and (B) having (1) a creep resistance coefficient K defined by the following equation of at least 0.1 but not exceeding 0.6, K=log J.sub.90.sup.C (10)-log J.sub.90.sup.C (1) wherein J 90 C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90° C. by a parallel plate plastometer, and J 90 C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90° C. by a parallel plate plastometer, and (2) a creep compliance J 25 C (1) of at least 3×10 -9 cm 2 /dyne but not exceeding 1×10 -6 cm 2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25° C. by a parallel plate plastomer.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein the styrene-butadiene copolymer latex has a solids content of 30 to 90% by weight.
Claim 4
Dependent Claim
27 words
The composition of claim 1 wherein the solid rubber of the styrene-butadiene copolymer latex has a Mooney viscosity (ML 1+4 100 ° C.) of 25 to 160.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein the styrene-butadiene copolymer latex has a styrene content of 23 to 55% by weight.
Claim 6
Dependent Claim
17 words
The composition of claim 1 which further comprises a surface active agent, an antioxidant and a thickener.
Claim 7
Dependent Claim
261 words
A can end sealing composition consisting essentially of a styrene-butadiene rubbery copolymer latex component, a tackifier and a filler; said latex component having a solids content of 40 to 60% by weight, a styrene content of 23 to 55% by weight, and the solid rubber of such latex component having a Mooney viscosity (ML 1+4 100 ° C.) of 3- to 140; said tackifier being present in amount of 80-150 parts by weight based on 100 parts of said solid rubber; said filler being present in amount of 50-140 parts by weight based upon 100 parts of said solid rubber; and said composition having (1) a creep resistance coefficient K= log J 90 C (10)- log J 90 C (1) of at least 0.1 but not exceeding 0.6, where J 90 C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90° C. by a parallel plate plastometer, and J 90 C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90° C. by a parallel plate plastometer, and (2) a creep compliance J 25 C (1) of at least 3×10 -9 cm 2 /dyne but not exceeding 1×10 -6 cm 2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25° C. by a parallel plate plastometer, said latex component being obtained by emulsion polymerization at 35° to 70° C.
Claim 8
Dependent Claim
261 words
A can end sealing composition consisting essentially of a styrene-butadiene rubbery copolymer latex component, a tackifier and a filler; said latex component having a solids content of 40 to 60% by weight, a styrene content of 23 to 55% by weight, and the solid rubber of such latex component having a Mooney viscosity (ML 1+4 100 ° C.) of 3- to 140; said tackifier being present in amount of 80-150 parts by weight based on 100 parts of said solid rubber; said filler being present in amount of 50-140 parts by weight based upon 100 parts of said solid rubber; and said composition having (1) a creep resistance coefficient K= log J 90 C (10)- log J 90 C (1) of at least 0.1 but not exceeding 0.6, where J 90 C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90° C. by a parallel plate plastometer, and J 90 C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90° C. by a parallel plate plastometer, and (2) a creep compliance J 25 C (1) of at least 3×10 -9 cm 2 /dyne but not exceeding 1×10 -6 cm 2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25° C. by a parallel plate plastometer, said latex component being obtained by emulsion polymerization at 35° to 70° C.
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) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |