Patent US4433105A successfully refreshed from Google Patents.
US4433105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorinated rubber and polyvinyl chloride composition containing the same
Assignee: Mitsui Chemicals Inc
•
Filing: 1981-08-04
•
Granted: 1984-02-21
•
Expires: 2001-08-04
Abstract
Abstract A chlorinated rubber having a chlorine content of about 5 through about 50% by weight and a Mooney viscosity (ML1+4 at 100 DEG C.) of about 20 through about 150 is presented. This chlorinated rubber is derived from the chlorination of (i) a copolymer rubber of ethylene and 1-butene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 or (ii) a copolymer rubber of ethylene 1-butene and 5-ethylidene-2-norbornene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 and a content of the 5-ethylidene-2-norbornene of 20% by weight or less based on the weight of the copolymer. The incorporation of the chlorinated rubber into a polyvinyl chloride composition results in the remarkable improvement of the impact resistance and flexibility, both at a low temperature, of the polyvinyl chloride.
Inventors
- 👤 Akira Matsuda
- 👤 Tetsuo Tojyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:20
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08F8/22; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L23/00; C08L23/26; C08L23/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A chlorinated rubber having a chlorine content of 10 through 50% by weight of a Mooney viscosity (ML 1+4 at 100° C.) of about 20 through about 150, said chlorinated rubber being derived from the chlorination of (i) a copolymer rubber of ethylene and 1-butene having a mol ratio of ethylene/1-butene of 87/13 through 95/5 or (ii) a copolymer rubber of ethylene, 1-butene and 5-ethylidene-2-norboronese having a mol ratio of ethylene/1-butene of 87/13 through 95/5 and a content of the 5-ethylidene-2-norbornene of 20% by weight or less based on the weight of the copolymer.
Claim 2
Dependent Claim
94 words
A chlorinated rubber having a chlorine content of 10 through 50% by weight of a Mooney viscosity (ML 1+4 at 100° C.) of about 20 through about 150, said chlorinated rubber being derived from the chlorination of (i) a copolymer rubber of ethylene and 1-butene having a mol ratio of ethylene/1-butene of 87/13 through 95/5 or (ii) a copolymer rubber of ethylene, 1-butene and 5-ethylidene-2-norboronese having a mol ratio of ethylene/1-butene of 87/13 through 95/5 and a content of the 5-ethylidene-2-norbornene of 20% by weight or less based on the weight of the copolymer.
Claim 3
Dependent Claim
19 words
A chlorinated rubber as claimed in claim 1, wherein the density of the chlorinated rubber is 0.950 through 1.200.
Claim 4
Dependent Claim
22 words
A chlorinated rubber as claimed in claim 1, wherein the chlorine content of the chlorinated rubber is 10 through 35% by weight.
Claim 5
Dependent Claim
35 words
A chlorinated rubber as claimed in claim 1, wherein the particle size of the chlorinated rubber is such that the particles pass through a screen having an opening size of a 10 mesh (Tyler No.).
Claim 6
Dependent Claim
36 words
A chlorinated rubber as claimed in claim 1, wherein the content of the 5-ethylidene-2-norbornene in the copolymer rubber (ii) prior to the chlorination is 2 through 20% by weight based on the weight of the copolymer.
Claim 7
Dependent Claim
41 words
A chlorinated rubber as claimed in claim 1, wherein the ratio of the weight average molecular weight to the number average molecular weight (Mw/Mn) of the starting copolymer of ethylene and 1-butene or ethylene, 1-butene and 5-ethylidene-2-norbornene is less than 3.
Claim 8
Dependent Claim
120 words
A polyvinyl chloride composition comprising 100 parts by weight of polyvinyl chloride and 3 through 200 parts by weight of at least one chlorinated rubber having a chlorine content of 5 through 50% by weight and a Mooney viscosity (ML 1+4 at 100° C.) of about 20 through about 150, said chlorinated rubber being derived from the chlorination of (i) a copolymer rubber of ethylene and 1-butene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 or (ii) a copolymer rubber of ethylene, 1-butene and 5-ethylidene-2-norbornene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 and a content of the 5-ethylidene-2-norbornene of 20% by weight or less based on the weight of the copolymer.
Claim 9
Dependent Claim
120 words
A polyvinyl chloride composition comprising 100 parts by weight of polyvinyl chloride and 3 through 200 parts by weight of at least one chlorinated rubber having a chlorine content of 5 through 50% by weight and a Mooney viscosity (ML 1+4 at 100° C.) of about 20 through about 150, said chlorinated rubber being derived from the chlorination of (i) a copolymer rubber of ethylene and 1-butene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 or (ii) a copolymer rubber of ethylene, 1-butene and 5-ethylidene-2-norbornene having a mol ratio of ethylene/1-butene of about 85/15 through about 95/5 and a content of the 5-ethylidene-2-norbornene of 20% by weight or less based on the weight of the copolymer.
Claim 10
Dependent Claim
20 words
A polyvinyl chloride composition as claimed in claim 7, wherein the density of the chlorinated rubber is 0.950 through 1.200.
Claim 11
Dependent Claim
23 words
A polyvinyl chloride composition as claimed in claim 7, wherein the chlorine content of the chlorinated rubber is 5 through 35% by weight.
Claim 12
Dependent Claim
36 words
A polyvinyl chloride composition as claimed in claim 7, wherein the particle size of the chlorinated rubber is such that the particles pass through a screen having an opening size of a 10 mesh (Tyler No.).
Claim 13
Dependent Claim
37 words
A polyvinyl chloride composition as claimed in claim 7, wherein the content of the 5-ethylidene-2-norbornene in the copolymer rubber (ii) prior to the chlorination is 2 through 20% by weight based on the weight of the copolymer.
Claim 14
Dependent Claim
34 words
A polyvinyl chloride composition as claimed in claim 7, wherein the content of said chlorinated rubber is about 5 through about 100 parts by weight based on 100 parts by weight of polyvinyl chloride.
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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |