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US4857409A
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Clear barrier composites containing polyisobutylene/polyolefin alloy components
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1987-07-17
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Granted: 1989-08-15
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Expires: 2007-07-17
Abstract
Abstract A composite film composition comprising a rubber containing core layer wherein the layer comprises about 50 to 85 wt % rubber and 15 to 40 wt % of a polyolefin and at least one polyolefin skin layer co-extruded onto said core layer. In a preferred embodiment, the core layer comprises about 55 to about 70 wt % PIB and about 30 to about 45 wt % of PP or RCPP having been co-extruded to be sandwiched between two polyolefin layers comprisng PP or RCPP.
Inventors
- 👤 Donald R. Hazelton
- 👤 Cindy B. Shulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:43
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29C59/00; B29C59/02; B29C59/04; B29C59/046; B32; B32B; B32B25/00; B32B25/04; B32B25/08; C08L23/04; C08L23/06; C08L23/16; C08L23/18; C08L23/20; C08L23/22; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/08; B29K2023/083; B29K2023/086; B29K2023/10; B29K2023/12; B29K2023/16; B29K2995/00; B29K2995/0018; B29K2995/0022; B29K2995/0026; C08L2205/00; C08L2205/03; C08L2207/00; C08L2207/53; C08L23/08; C08L23/0807; C08L23/0815; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
74 words
A composite film composition comprising a rubber containing core component and at least one skin layer wherein the skin layer comprises a polyolefin resin and the rubber containing core component comprises about 50 wt % to 85 wt % of rubber and about 50 wt % to 15 wt % polyolefin wherein said rubber is selected from the group consisting of polyisobutylene, butyl rubber, halogenated butyl rubber, ethylene propylene rubber, ethylene-propylene-diene rubber, and polychloroprene.
Claim 2
Dependent Claim
74 words
A composite film composition comprising a rubber containing core component and at least one skin layer wherein the skin layer comprises a polyolefin resin and the rubber containing core component comprises about 50 wt % to 85 wt % of rubber and about 50 wt % to 15 wt % polyolefin wherein said rubber is selected from the group consisting of polyisobutylene, butyl rubber, halogenated butyl rubber, ethylene propylene rubber, ethylene-propylene-diene rubber, and polychloroprene.
Claim 3
Dependent Claim
33 words
The composite film according to claim 1 wherein the rubber core component comprises about 60 to about 85 wt % of rubber and about 15 to about 40 wt % of a polyolefin.
Claim 4
Dependent Claim
21 words
The composite film according to claim 1 wherein the polyolefin skin layer is polypropylene, RCPP, HDPE, LLDPE, polybutene-1 or mixtures thereof.
Claim 5
Dependent Claim
27 words
The composite film according to claim 1 wherein the rubber composition comprises about 65 to about 85 wt % rubber and about 15 to about 35% polyolefin.
Claim 6
Dependent Claim
23 words
The composite film according to claim 1 wherein the rubber composition comprises 65 wt % PIB and 35 wt % PP or RCPP.
Claim 7
Dependent Claim
24 words
The composite film according to claim 1 wherein the film comprises a sandwich construction of two polyolefin skins having an inner rubber composition core.
Claim 8
Dependent Claim
31 words
The composite film according to claim 6 wherein the rubber composition comprises 50 to about 85 wt % of rubber and about 15 to about 50 wt % of a polyolefin.
Claim 9
Dependent Claim
21 words
The composite film according to claim 6 wherein the rubber is PIB, butyl rubber, halogenated butyl rubber, EPM, EPDM or polychloroprene.
Claim 10
Dependent Claim
20 words
The composite film according to claim 6 wherein the rubber composition comprises a blend of PIB with PP or RCPP.
Claim 11
Dependent Claim
29 words
The composite film according to claim 6 wherein the rubber composition comprises about 65 to about 85 wt % rubber and about 15 to about 35 wt % polyolefin.
Claim 12
Dependent Claim
16 words
The composite film composition according to claim 1 wherein the rubber is butyl rubber or PIB.
Claim 13
Dependent Claim
15 words
The composite film composition according to claim 1 wherein the rubber is EPM or EPDM.
Claim 14
Dependent Claim
20 words
The composite film composition according to claim 6 wherein the skin layer comprises a polyolefin which is PP or RCPP.
Claim 15
Dependent Claim
20 words
The composite film composition according to claim 10 wherein the rubber is PIB and the polyolefin is PP or RCPP.
Claim 16
Dependent Claim
16 words
The composite film composition according to claim 14 wherein the skin layer is PP or RCPP.
Claim 17
Dependent Claim
24 words
The composite film according to claim 1 wherein the rubber containing core component comprises an EPM or EPDM rubber and PP or RCPP polyolefin.
Claim 18
Dependent Claim
25 words
The composite film according to claim 16 wherein the rubber comprises about 65 wt % to about 85 wt % of the rubber containing component.
Claim 19
Dependent Claim
21 words
The composite film according to claim 1 wherein at least one skin layer has a 45° gloss of at least 50.
Claim 20
Dependent Claim
15 words
The composite film according to claim 18 wherein the 45° gloss is at least 60.
Claim 21
Dependent Claim
15 words
The composite film according to claim 18 wherein the 45° gloss is at least 75.
Claim 22
Dependent Claim
16 words
The composite film composition according to claim 6 wherein the rubber is butyl rubber or PIB.
Claim 23
Dependent Claim
15 words
The composite film composition according to claim 6 wherein the rubber is EPM or EPDM.
Claim 24
Dependent Claim
21 words
The composite film composition according to claim 6 wherein one polyolefin skin comprises a different polyolefin than the other polyolefin skin.
Claim 25
Dependent Claim
23 words
The composite film composition according to claim 6 wherein one polyolefin skin comprises PP or RCPP and the other polyolefin skin comprises PVDC.
Claim 26
Dependent Claim
15 words
The composite according to claim 24 wherein the rubber comprises at least one halogenated rubber.
Claim 27
Dependent Claim
19 words
The composite according to claim 25 wherein the PVDC is tied to the rubber composition by a tie layer.
Claim 28
Dependent Claim
14 words
The composite according to claim 26 wherein the tie layer is a polyurethane adhesive.
Claim 29
Dependent Claim
33 words
The composite according to claim 6 wherein the polyolefin skins comprise a polyolefin other than PVDC and at least one of said polyolefin skins is overlayered by a film of PVDC adhered thereto.
Claim 30
Dependent Claim
17 words
A retort pouch container for solids and liquids prepared from the composite film according to claim 1.
Claim 31
Dependent Claim
23 words
The composite film according to claim 6 wherein at least one of the skin layers has a 45° gloss of at least 50.
Claim 32
Dependent Claim
23 words
The composite film according to claim 6 wherein at least one of the skin layers has a 45° gloss of at least 60.
Claim 33
Dependent Claim
23 words
The composite film according to claim 6 wherein at least one of the skin layers has a 45° gloss of at least 75.
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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |