US4464500A
Expired / Lapsed
US
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Polymeric composition and use thereof
Assignee: JH Diamond Co
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Filing: 1983-08-09
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Granted: 1984-08-07
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Expires: 2003-08-09
Abstract
Abstract A polymeric composition containing butyl rubber, and/or bromobutyl rubber, and/or chlorobutyl rubber; a EPDM polymer, and polyethylene; and use thereof to prepare molded, cured, flexible bulbs are provided.
Inventors
- 👤 Jeffrey Diamond
- 👤 David S. Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L23/26; C08L23/28; C08L23/283
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
93 words
A polymeric composition comprising: (A) about 55 to about 65 parts by weight of a butyl-type rubber selected from the group of butyl rubber, bromobutyl rubber, chlorobutyl rubber, or mixtures thereof; (B) about 35 to about 45 parts by weight of an ethylene, a higher α-olefin and a polyene polymer; and (C) about 25 to about 35 parts by weight of amorphous and have a high melt index or high molecular weight polyethylene; wherein the above amounts by weight are based upon 100 parts by weight of the total of (A) and (B).
Claim 2
Dependent Claim
93 words
A polymeric composition comprising: (A) about 55 to about 65 parts by weight of a butyl-type rubber selected from the group of butyl rubber, bromobutyl rubber, chlorobutyl rubber, or mixtures thereof; (B) about 35 to about 45 parts by weight of an ethylene, a higher α-olefin and a polyene polymer; and (C) about 25 to about 35 parts by weight of amorphous and have a high melt index or high molecular weight polyethylene; wherein the above amounts by weight are based upon 100 parts by weight of the total of (A) and (B).
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said rubber is butyl rubber.
Claim 4
Dependent Claim
20 words
The composition of claim 2 wherein said butyl rubber has an unsaturation content of about 1 mole percent or less.
Claim 5
Dependent Claim
19 words
The composition of claim 2 wherein said butyl rubber has a Mooney viscosity of ML(1+12, 257° F.) of 54.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein said polymer is a copolymer of ethylene, propylene, and an alkenyl norbornene.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein said alkenyl norbornene is ethylidene norbornene.
Claim 8
Dependent Claim
43 words
The composition of claim 5 wherein the polymer (B) contains about 65 to about 85 percent by weight of ethylene, about 5 to about 35 percent by weight of propylene, and about 0.2 to about 10 percent by weight of said alkenyl norbornene.
Claim 9
Dependent Claim
13 words
The composition of claim 7 wherein said polymer (B) is a non-crystalline polymer.
Claim 10
Dependent Claim
23 words
The composition of claim 6 wherein said polymer (B) has a Mooney viscosity of ML(1+8, 260° F.) of about 65 to about 75.
Claim 11
Dependent Claim
35 words
The composition of claim 1 which rubber (A) contains about 60 parts by weight of said rubber, about 40 parts by weight of said EPDM polymer, and about 30 parts by weight of said polyethylene.
Claim 12
Dependent Claim
23 words
The composition of claim 1 which additionally contains sulphur or sulphur furnishing compound in an amount sufficient to cause curing of the compositiion.
Claim 13
Dependent Claim
32 words
The composition of claim 11 which contains about 1.25 to about 1.75 parts by weight of sulphur based upon the total of the butyl-type rubber and the polymer (B) in the composition.
Claim 14
Dependent Claim
33 words
The composition of claim 11 which includes about 1.5 parts by weight of sulphur based upon 100 parts by weight of the total of the butyl rubber and polymer (B) in the composition.
Claim 15
Dependent Claim
33 words
The composition of claim 11 which includes about 1.5 parts by weight of sulphur based upon 100 parts by weight of the total of the butyl rubber and polymer (B) in the composition.
Claim 16
Dependent Claim
31 words
The composition of claim 11 which additionally contains about 4 to about 6 parts by weight of zinc oxide and about 1.5 to about 2.5 parts by weight of stearic acid.
Claim 17
Dependent Claim
24 words
The composition of claim 15 which contains about 5 parts by weight of zinc oxide and about 2 parts by weight of stearic acid.
Claim 18
Dependent Claim
38 words
The composition of claim 15 which additionally contains 2-mercaptobenzothiazole in amounts of about 1 to about 1.5 parts by weight based upon the total of 100 parts total of the butyl-type rubber and polymer (B) in the composition.
Claim 19
Dependent Claim
10 words
The composition of claim 17 which additionally contains an antioxidant.
Claim 20
Dependent Claim
38 words
The composition of claim 18 wherein said antioxidant is about 1 to about 1.25 parts by weight of octylated diphenylamine per 100 parts of the total of the butyl-type rubber and the EPDM polymer (B) in the composition.
Claim 21
Dependent Claim
11 words
The composition of claim 19 which additionally contains an optical brightener.
Claim 22
Dependent Claim
37 words
The composition of claim 20 wherein said optical brightener is about 15 to about 25 parts by weight of TiO 2 per 100 parts by weight of the butyl-type rubber and the polymer (B) in the composition.
Claim 23
Dependent Claim
14 words
A flexible bulb obtained from molding and curing the polymeric composition of claim 1.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |