US4563379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing web
Assignee: PIRELLI SACIC A BELGIAN CORP
•
Filing: 1984-05-02
•
Granted: 1986-01-07
•
Expires: 2004-05-02
Abstract
Abstract Sealing web of at least one layer on the basis of mixed polymerizates of ethylene and propylene with or without ter-component (EPDM/EPM). Mixed polymerizates with an ethylene content of at least 50 parts by weight are heat-treated with a reinforcement resin and form through heat treatment an interpenetrating network of chemically non-cross-linked EPDM/EPM and cross-linked reinforcement resin, which can be welded together thermally and/or by dissolving or swelling agents.
Inventors
- 👤 Gerhard Kruger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:05
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/06; Y; Y10; Y10T; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/193; Y10T428/197; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928; Y10T428/31942; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/164; Y10T442/169
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
Sealing covering comprising at least one layer containing copolymers selected from the group consisting of ethylene propylene diene terpolymer (EPDM) and ethylene propylene copolymer (EPM), said copolymers having an ethylene content of at least 50 parts by weight, a reinforcement resin in admixture with the copolymers, said copolymers and reinforcement resin being free of vulcanization accelerators and forming an unvulcanizable interpenetrating network, by heat treatment, of the chemically non-cross-linked copolymers and chemically cross-linked reinforcement resin, said interpenetrating network imparting to the sealing covering the property of welding by heat sealing or solvent welding.
Claim 2
Dependent Claim
93 words
Sealing covering comprising at least one layer containing copolymers selected from the group consisting of ethylene propylene diene terpolymer (EPDM) and ethylene propylene copolymer (EPM), said copolymers having an ethylene content of at least 50 parts by weight, a reinforcement resin in admixture with the copolymers, said copolymers and reinforcement resin being free of vulcanization accelerators and forming an unvulcanizable interpenetrating network, by heat treatment, of the chemically non-cross-linked copolymers and chemically cross-linked reinforcement resin, said interpenetrating network imparting to the sealing covering the property of welding by heat sealing or solvent welding.
Claim 3
Dependent Claim
40 words
Sealing covering according to claim 1, wherein the reinforcement resin is 5 to 15 parts by weight of the copolymers, and including 0.2 to 2 parts by weight of a formaldehyde donor per 100 parts by weight of the copolymers.
Claim 4
Dependent Claim
14 words
Sealing covering according to claim 1, wherein the reinforcement resin is a phenolic resin.
Claim 5
Dependent Claim
14 words
Sealing covering according to claim 2, wherein the reinforcement resin is a phenolic resin.
Claim 6
Dependent Claim
13 words
Sealing covering according to claim 3, wherein the phenolic resin is a novalak-resin.
Claim 7
Dependent Claim
14 words
Sealing covering according to claim 4, wherein hexamethylene tetramine is used as a donor.
Claim 8
Dependent Claim
12 words
Sealing covering according to claim 5, including hexamethylene tetramine as a donor.
Claim 9
Dependent Claim
19 words
Sealing covering according to claim 1, including a reinforcement layer of textile material arranged between two sealing covering layers.
Claim 10
Dependent Claim
19 words
Sealing covering according to claim 1, including a reinforcement layer of glass fibers arranged between two sealing covering layers.
Claim 11
Dependent Claim
14 words
Sealing covering according to claim 8, wherein the reinforcement layer is a coarse-mesh fabric.
Claim 12
Dependent Claim
19 words
Sealing covering according to claim 1, including a nonwoven fabric layer laminated to the underside of the sealing covering.
Claim 13
Dependent Claim
32 words
Sealing covering according to claim 1, including the combination therewith of a layer of vulcanized copolymers selected from the group consisting of ethylene propylene diene terpolymer (EPDM) and ethylene propylene copolymer (EPM).
Claim 14
Dependent Claim
48 words
Sealing covering according to claim 12, including the combination therewith of two spaced sealing coverings with a gap therebetween and another strip of material similar to the sealing covering bridging the gap and overlapping and welded to the other two sealing coverings to form a strip-shaped expansion gap.
References Cited (Backward Citations)
US3976530A
Cited
US3960982A
Cited
US3927233A
Cited
US4153748A
Cited
US4390384A
Cited
US4468422A
Cited
US4461794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |