US4300988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polybutylene and conjugated diene butyl polymer blends
Assignee: Radiation Dynamics Inc
•
Filing: 1980-07-25
•
Granted: 1981-11-17
•
Expires: 2000-07-25
Abstract
Abstract Blends of polybutylene and a conjugated diene butyl rubber can be cured by ionizing radiation to form products with excellent resistance to set, sufficient melt flow properties to be re-workable as a plastic after curing and which exhibit significant strength characteristics.
Inventors
- 👤 Anthony J. Berejka
- 👤 Richard Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:23
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
10 words
A composition comprising polybutylene and a conjugated diene butyl polymer.
Claim 2
Dependent Claim
10 words
A composition comprising polybutylene and a conjugated diene butyl polymer.
Claim 3
Dependent Claim
21 words
A composition according to claim 1 wherein said butyl polymer comprises a copolymer of isobutylene and a conjugated C 5 diene.
Claim 4
Dependent Claim
51 words
A composition according to claim 2 wherein said copolymer is represented by the structures: ##STR6## or mixtures of (A) and (B); wherein N, M, P and R are of a sufficient finite number and total so that the conjugated diene amounts to less than about 5 mole % of the structure.
Claim 5
Dependent Claim
19 words
A composition according to claim 3 wherein the conjugated diene amounts to about 1-2 mole % of the structure.
Claim 6
Dependent Claim
16 words
A composition according to claims 1, 2, 3 or 4 wherein said butyl polymer is cross-linkable.
Claim 7
Dependent Claim
15 words
A composition according to claim 5 wherein said butyl polymer consists essentially of said copolymer.
Claim 8
Dependent Claim
26 words
A composition according to claim 6 wherein said composition comprises about 90-10 percent by weight polybutylene and about 10-90 percent by weight conjugated diene butyl polymer.
Claim 9
Dependent Claim
26 words
A composition according to claim 7 wherein said composition comprises about 50-10 percent by weight polybutylene and about 50-90 percent by weight conjugated diene butyl polymer.
Claim 10
Dependent Claim
23 words
A composition according to claim 8 wherein said polybutylene is a flexible, crystalline, isotactic polyolefin having a density of about 0.91 or greater.
Claim 11
Dependent Claim
17 words
A composition according to claim 9 wherein said polybutylene has a melt index of from about 0.4-20.0.
Claim 12
Dependent Claim
17 words
A composition according to claim 5 wherein said composition is curable by subjecting it to ionizing radiation.
Claim 13
Dependent Claim
19 words
A composition according to claim 11 wherein said ionizing radiation is in a dose amount of about 1-20 Mrads.
Claim 14
Dependent Claim
14 words
A composition according to claim 12 wherein said dose amount is about 2-4 Mrads.
Claim 15
Dependent Claim
53 words
An article comprised of a blend which includes polybutylene and a conjugated diene butyl polymer, said article being capable of curing when subjected to ionizing radiation to a product which exhibits resistance to set and which can be heated after it is cured to a re-workable plastic consistency with significant melt flow properties.
Claim 16
Dependent Claim
53 words
An article comprised of a blend which includes polybutylene and a conjugated diene butyl polymer, said article being capable of curing when subjected to ionizing radiation to a product which exhibits resistance to set and which can be heated after it is cured to a re-workable plastic consistency with significant melt flow properties.
Claim 17
Dependent Claim
29 words
An article according to claim 14 consisting essentially of said blend, and wherein said conjugated butyl diene polymer comprises a copolymer of isobutylene and a conjugated C 5 diene.
Claim 18
Dependent Claim
51 words
An article according to claim 15 wherein said copolymer is represented by the structure: ##STR7## or mixtures of (A) and (B); wherein N, M, P and R are of a sufficient finite number and total so that the conjugated diene amounts to less than about 5 mole % of the structure.
Claim 19
Dependent Claim
56 words
An article according to claim 16 wherein said butyl diene polymer consists essentially of said copolymer and is a dehydrohalogenation product of halogenated butyl polymer which possesses a conjugated unsaturation in the linear backbone and wherein N, M, X, P, Y and R have the same values as the halogenated butyl polymer used in the process.
Claim 20
Dependent Claim
15 words
An article according to claim 17 wherein said copolymer is primarily that represented by (A).
Claim 21
Dependent Claim
28 words
An article according to claims 14, 15 or 16 wherein said blend consists essentially of about 90-10 percent by weight polybutylene and 10-90 percent by weight butyl polymer.
Claim 22
Dependent Claim
28 words
An article according to claim 19 wherein said blend consists essentially of about 50-10 percent by weight polybutylene and about 50-90 percent by weight conjugated diene butyl polymer.
Claim 23
Dependent Claim
21 words
An article according to claim 19 which after curing by ionizing radiation exhibits a % set of less than about 80%.
Claim 24
Dependent Claim
26 words
An article according to claim 21 which after curing by ionizing radiation in an amount of about 1-4 Mrads exhibits a % set of about 25-75%.
Claim 25
Dependent Claim
68 words
An article according to claim 21 wherein said article after said curing exhibits: a 100% modulus (psi) of elongation (T 100 ) at 72° F. of about 150-1100; an ultimate strength (U.T.S. psi) at 72° F. of about 450-3000; an ultimate elongation (UE%) at 72° F. of at least about 560; and a melt index (gm/10 min at 230° C., 5 Kg) of about 1×10 -2 to 13.
Claim 26
Dependent Claim
44 words
An article consisting essentially of a blend of polybutylene and a conjugated diene butyl polymer which after curing by ionizing radiation will exhibit a modulus strength (T 100 ) greater than either the said polybutylene or conjugated diene butyl polymer used in the blend.
Claim 27
Dependent Claim
44 words
An article consisting essentially of a blend of polybutylene and a conjugated diene butyl polymer which after curing by ionizing radiation will exhibit a modulus strength (T 100 ) greater than either the said polybutylene or conjugated diene butyl polymer used in the blend.
Claim 28
Dependent Claim
12 words
An article according to claim 23 wherein said article is so cured.
Claim 29
Dependent Claim
23 words
An article according to claim 24 wherein said butyl polymer consists essentially of a copolymer of isobutylene and a conjugated C 5 diene.
References Cited (Backward Citations)
US3037954A
Cited
US3320330A
Cited
US3262997A
Cited
US3775387A
Cited
US3816371A
Cited
US4104210A
Cited
US4130534A
Cited
US4116914A
Cited
US4264490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |