US4814390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorinated rubber
Assignee: Mitsui Chemicals Inc
•
Filing: 1987-12-15
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Granted: 1989-03-21
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Expires: 2007-12-15
Abstract
Abstract A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney Viscosity, ML 1+4 (121° C.), of 10 to 190 is obtained by chlorinating an ethylene/alpha-olefin/non-conjugated diene copolymer rubber containing 5-vinyl-2-norbornene as the non-conjugated diene. The chlorinated rubber has excellent processability in roll milling, extrusion, etc.
Inventors
- 👤 Tetsuo Tojo
- 👤 Takashi Nakahara
- 👤 Yasuhiko Otawa
- 👤 Katsuo Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:59
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08F8/22; C08F8/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney viscosity, ML 1+4 (121° C.), of 10 to 190, said chlorinated rubber being obtained by chlorinating an ethylene/alpha-olefin/vinylnorbornene terpolymer rubber containing ethylene units and units of an alpha-olefin having 3 to 14 carbon atoms in a mole ratio of from 50:50 to 95:5 and 3 to 30 millimoles, per 100 g of the ethylene units and the alpha-olefin units combined, of 5-vinyl-2-norbornene units.
Claim 2
Dependent Claim
87 words
A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney viscosity, ML 1+4 (121° C.), of 10 to 190, said chlorinated rubber being obtained by chlorinating an ethylene/alpha-olefin/vinylnorbornene terpolymer rubber containing ethylene units and units of an alpha-olefin having 3 to 14 carbon atoms in a mole ratio of from 50:50 to 95:5 and 3 to 30 millimoles, per 100 g of the ethylene units and the alpha-olefin units combined, of 5-vinyl-2-norbornene units.
Claim 3
Dependent Claim
13 words
The chlorinated rubber of claim 1 wherein the alpha-olefin is propylene or butene-1.
Claim 4
Dependent Claim
24 words
The chlorinated rubber of claim 1 which contains the ethylene units and the alpha-olefin units in a mole ratio of from 70:30 to 92:8.
Claim 5
Dependent Claim
26 words
The chlorinated rubber of claim 1 wherein the ethylene/alpha-olefin/vinylnorbornene copolymer before chlorination has a number average molecular weight (Mn) of 2.0×10 4 to 10.0×10 4 .
Claim 6
Dependent Claim
26 words
The chlorinated rubber of claim 4 wherein the ethylene/alpha-olefin/vinylnorbornene copolymer rubber before chlorination has a molecular weight distribution (Mw/Mn) of 2.0 to 10.0, by G.P.C. method.
Claim 7
Dependent Claim
23 words
The chlorinated rubber of claim 1 wherein the ethylene/alpha-olefin/vinylnorbornene before chlorination has a crystallinity, determined by X-ray diffraction, of not more than 20%.
Claim 8
Dependent Claim
17 words
The chlorinated rubber of claim 1 which has a chlorine content of 10 to 35% by weight.
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |