US4086301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sealable vulcanizates comprising polyolefin rubber and propylene polymer
Assignee: Huels AG
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Filing: 1976-05-03
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Granted: 1978-04-25
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Expires: 1996-05-03
Abstract
Abstract Polyolefin rubber compositions which are readily heat-sealable are provided by the addition of 5-100 parts by weight, based on the polyolefin elastomer, of a propylene polymer uniformly admixed therewith prior to vulcanization which is selected from the group consisting of polypropylene and copolymers of propylene with up to 20% by weight of ethylene, butene-1 or hexene-1 which polymer has a heptane-extractable portion of 5-60%, and I-value measured according to DIN 53 728 of 100-600 cm3/g. and a yield point measured according to DIN 53 735 of 10-30 N/mm2.
Inventors
- 👤 Dieter Zerpner
- 👤 Klaus Zur Nedden
- 👤 Albert Frese
- 👤 Hans Datene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:49
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08K5/14; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34924; C08L23/10; C08L23/18; C08L23/20; C08L23/22; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
In a heat-sealable polyolefin elastomer vulcanizate comprising: (a) a polyolefin elastomer selected from the group consisting of EP copolymers of ethylene with at least one of propylene and butene-1, and EPDM copolymers of ethylene and at least one of propylene and butene-1 with an unconjugated diene, and (b) a cross-linking amount of an elastomer cross-linking agent, the improvement which comprises: 5-100 parts by weight, based on said polyolefin elastomer, of a propylene polymer uniformly admixed therewith prior to vulcanization which is selected from the group consisting of polypropylene and copolymers of propylene with up to 20% by weight of ethylene, butene-1 or hexene-1 which polymer has a heptane-extractable portion of 5-60%, and I-value measured according to DIN 53 728 of 100-600 cm 3 /g. and a yield point measured according to DIN 53 735 of 10-30 N/mm 2 .
Claim 2
Dependent Claim
139 words
In a heat-sealable polyolefin elastomer vulcanizate comprising: (a) a polyolefin elastomer selected from the group consisting of EP copolymers of ethylene with at least one of propylene and butene-1, and EPDM copolymers of ethylene and at least one of propylene and butene-1 with an unconjugated diene, and (b) a cross-linking amount of an elastomer cross-linking agent, the improvement which comprises: 5-100 parts by weight, based on said polyolefin elastomer, of a propylene polymer uniformly admixed therewith prior to vulcanization which is selected from the group consisting of polypropylene and copolymers of propylene with up to 20% by weight of ethylene, butene-1 or hexene-1 which polymer has a heptane-extractable portion of 5-60%, and I-value measured according to DIN 53 728 of 100-600 cm 3 /g. and a yield point measured according to DIN 53 735 of 10-30 N/mm 2 .
Claim 3
Dependent Claim
16 words
A vulcanizate according to claim 1 wherein said propylene polymer has a heptane-extractable proportion of 8-45%.
Claim 4
Dependent Claim
18 words
A vulcanizate according to claim 1 wherein said propylene polymer has an I-value of 150-500 cm 3 /g.
Claim 5
Dependent Claim
19 words
A vulcanizate according to claim 1 wherein said propylene polymer has a yield point of 16-28 N/mm 2 .
Claim 6
Dependent Claim
23 words
A vulcanizate according to claim 1 further comprising a plasticizing amount of a plasticizer oil and a strengthening amount of an elastomer filler.
Claim 7
Dependent Claim
23 words
A vulcanizate according to claim 5 wherein said cross-linking agent comprises sulfur in combination with a vulcanization accelerator, zinc oxide and stearic acid.
Claim 8
Dependent Claim
17 words
A vulcanizate according to claim 1 wherein the polyolefin elastomer is a copolymer of ethylene and propylene.
Claim 9
Dependent Claim
14 words
A vulcanizate according to claim 1 wherein the polyolefin elastomer is an EPDM terpolymer.
Claim 10
Dependent Claim
17 words
The vulcanizate according to claim 8 wherein the unconjugated diene is 1,4-hexadiene, dicyclopentadiene, 5-methylene-, 5-ethylidene- or 5-isopropylidene-2-norbornene.
References Cited (Backward Citations)
US3564080A
Cited
US3806558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |