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Patent US4252909A successfully refreshed from Google Patents.
US4252909A
Expired / Lapsed
US
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Free-expandable rubbery composition
Assignee: Mitsui Chemicals Inc
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Filing: 1979-03-06
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Granted: 1981-02-24
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Expires: 1999-03-06
Abstract
Abstract A free expandable rubbery composition comprising an ethylene/ alpha -olefin copolymer or terpolymer, a blowing agent and a crosslinking agent, said ethylene/ alpha -olefin co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole % of an ethylene unit, (B) it has an (EBxTS) value of at least 7,000 wherein EB represents the break elongation (%) of the co- or terpolymer and TS is the maximum tensile strength (kg/cm2) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML1+4 at 121 DEG C., of 65 to 120. This composition can be used for the production of a crosslinked and foamed rubbery article by the free expansion method.
Inventors
- 👤 Kiyoshi Honma
- 👤 Hidekuni Oda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08L; C08L23/00; C08L23/02; C08L23/16; C08L91/00; C08J2323/00; C08J2323/02; C08J2323/16; C08L2312/00; Y; Y10; Y10S; Y10S521/00; Y10S521/909; Y10S521/91
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
96 words
A free expandable rubbery composition comprising an ethylene/α-olefin copolymer or terpolymer, a blowing agent and a crosslinking agent, said ethylene/α-olefin co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole% of an ethylene unit, (B) it has an (EB×TS) value of at least 7,000 wherein EB represents the break elongation (%) of the co- or terpolymer and TS is the maximum tensile strength (kg/cm 2 ) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML 1+4 at 121° C., of 65 to 120.
Claim 2
Dependent Claim
96 words
A free expandable rubbery composition comprising an ethylene/α-olefin copolymer or terpolymer, a blowing agent and a crosslinking agent, said ethylene/α-olefin co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole% of an ethylene unit, (B) it has an (EB×TS) value of at least 7,000 wherein EB represents the break elongation (%) of the co- or terpolymer and TS is the maximum tensile strength (kg/cm 2 ) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML 1+4 at 121° C., of 65 to 120.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein said ethylene/α-olefin co- or terploymer has an ethylene unit content of 60 to 70 mole%.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein the ethylene/α-olefin co- or terpolymer has an (EB×TS) value of 10,000 to 100,000.
Claim 5
Dependent Claim
24 words
The composition of claim 1 wherein the ethylene/α-olefin co- or terpolymer has a maximum tensile strength (TS) of 5 to 60 kg/cm 2 .
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein the ethylene/α-olefin co- or terpolymer has a break elongation of at least 1,000%.
Claim 7
Dependent Claim
25 words
The composition of claim 1 wherein the ethylene/α-olefin co- or terpolymer has a Mooney viscosity, ML 1+4 , at 121° C., of 70 to 110.
Claim 8
Dependent Claim
10 words
The composition of claim 1 wherein the α-olefin is propylene.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein the ethylene/α-olefin terpolymer is an ethylene/α-olefin/diolefin terpolymer.
Claim 10
Dependent Claim
18 words
The composition of claim 8 wherein the terpolymer has a diolefin unit content of at most 10 mole%.
Claim 11
Dependent Claim
11 words
The composition of claim 8 wherein the diolefin is ethylidene norbornene.
Claim 12
Dependent Claim
28 words
The composition of claim 1 wherein the copolymer or terpolymer is present in an amount of 20 to 65% by weight based on the weight of the composition.
Claim 13
Dependent Claim
31 words
The composition of claim 1 wherein the blowing agent is present in an amount of 0.5 to 50 parts by weight per 100 parts by weight of the co- or terpolymer.
Claim 14
Dependent Claim
31 words
The composition of claim 1 wherein the crosslinking agent is present in an amount of 0.1 to 15 parts by weight per 100 parts by weight of the co- or terpolymer.
Claim 15
Dependent Claim
16 words
The composition of claim 1 wherein the composition further comprises a softening agent and/or a filler.
Claim 16
Dependent Claim
99 words
Use of an ethylene/α-olefin co- or terpolymer for the production of a crosslinked and foamed rubbery article by the free expansion method, said co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole% of an ethylene unit. (B) it has an (EB×TS) value of at least 7,000 wherein EB is the break elongation (%) of the co- or terpolymer, and TS is the maximum tensile strength (kg/cm 2 ) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML 1+4 at 121° C., of 65 to 120.
Claim 17
Dependent Claim
99 words
Use of an ethylene/α-olefin co- or terpolymer for the production of a crosslinked and foamed rubbery article by the free expansion method, said co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole% of an ethylene unit. (B) it has an (EB×TS) value of at least 7,000 wherein EB is the break elongation (%) of the co- or terpolymer, and TS is the maximum tensile strength (kg/cm 2 ) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML 1+4 at 121° C., of 65 to 120.
Claim 18
Dependent Claim
109 words
A process for producing a crosslinked and foamed rubbery article which comprises allowing an ethylene/α-olefin co- or terpolymer to expand freely in the presence of a blowing agent and a crosslinking agent, said co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole% of an ethylene unit, (B) it has an (EB×TS) value of at least 7,000 wherein EB is the break elongation (%) of the co- or terpolymer, and TS is the maximum tensile strength (kg/cm 2 ) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML 1+4 at 121° C., of 65 to 120.
Claim 19
Dependent Claim
109 words
A process for producing a crosslinked and foamed rubbery article which comprises allowing an ethylene/α-olefin co- or terpolymer to expand freely in the presence of a blowing agent and a crosslinking agent, said co- or terpolymer simultaneously meeting the following requirements (A), (B) and (C): (A) it contains 55 to 73 mole% of an ethylene unit, (B) it has an (EB×TS) value of at least 7,000 wherein EB is the break elongation (%) of the co- or terpolymer, and TS is the maximum tensile strength (kg/cm 2 ) of the co- or terpolymer, and (C) it has a Mooney viscosity, ML 1+4 at 121° C., of 65 to 120.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |