US4151137A
Expired / Lapsed
US
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Blend compositions
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-11-29
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Granted: 1979-04-24
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Expires: 1997-11-29
Abstract
Abstract This invention relates to injection moldable and extrusion type elastomeric compositions having a viscosity at 200 DEG C. at 0.73 sec-1 of less than about 8x105 poises. The compositions used for elastomeric articles include 100 parts of a neutralized sulfonated EPDM terpolymer; less than about 200 parts per hundred of a paraffinic, low polarity process oil; about 25 to about 200 parts per hundred of an amorphous silica filler treated or untreated; and a preferential plasticizer at about less than 50 parts per hundred based on 100 parts of the sulfonated elastomeric polymer. The composition may also include a crystalline polyolefinic thermoplastic at less than about 100 parts per hundred by weight per 100 parts of sulfonated polymer.
Inventors
- 👤 Ilan Duvdevani
- 👤 Jan Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:42
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/32; Y; Y10; Y10S; Y10S260/00; Y10S260/31
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
169 words
An elastomeric composition having a viscosity at 0.73 sec -1 at 200° C. of less than about 8×10 5 poises, said composition injection moldable or extrudable into an elastomeric article, which comprises: (a) a neutralized sulfonated elastomeric polymer having about 5 to about 50 meq. neutralized sulfonate groups per 100 grams of said sulfonated elastomeric polymer; (b) about 20 to about 200 parts by weight of a non-polar process oil per hundred parts of said neutralized sulfonated elastomeric polymer, said oil having less than about 2 wt. % polar constituents; (c) about 25 to about 200 parts by weight of an amorphous silica filler per hundred parts of said neutralized sulfonated elastomeric polymer, said amorphous silica filler having a particle size of less than about 2 microns treated or untreated, wherein a ratio of said amorphous silica filler to said oil is from about 0.2 to about 4; and (d) a preferential ionic plasticizer at about at least 5 parts per hundred parts of said neutralized sulfonated elastomeric polymer.
Claim 2
Dependent Claim
169 words
An elastomeric composition having a viscosity at 0.73 sec -1 at 200° C. of less than about 8×10 5 poises, said composition injection moldable or extrudable into an elastomeric article, which comprises: (a) a neutralized sulfonated elastomeric polymer having about 5 to about 50 meq. neutralized sulfonate groups per 100 grams of said sulfonated elastomeric polymer; (b) about 20 to about 200 parts by weight of a non-polar process oil per hundred parts of said neutralized sulfonated elastomeric polymer, said oil having less than about 2 wt. % polar constituents; (c) about 25 to about 200 parts by weight of an amorphous silica filler per hundred parts of said neutralized sulfonated elastomeric polymer, said amorphous silica filler having a particle size of less than about 2 microns treated or untreated, wherein a ratio of said amorphous silica filler to said oil is from about 0.2 to about 4; and (d) a preferential ionic plasticizer at about at least 5 parts per hundred parts of said neutralized sulfonated elastomeric polymer.
Claim 3
Dependent Claim
30 words
A composition according to claim 1, wherein said neutralized sulfonated elastomeric polymer is formed from an elastomeric polymer selected from the group consisting of Butyl rubber and an EPDM terpolymer.
Claim 4
Dependent Claim
42 words
A composition according to claim 1, wherein said sulfonate groups are neutralized with a counterion being selected from the group consisting of ammonium, antimony, aluminum, lead and Groups IA, IIA, IB and IIB of the Periodic Table of Elements and mixtures thereof.
Claim 5
Dependent Claim
45 words
A composition according to claim 2, wherein said EPDM terpolymer consists essentially of about 40 to about 80 wt. % of ethylene, of about 10 to about 59 wt. % of propylene and of about 1 to about 10 wt. % of a nonconjugated diene.
Claim 6
Dependent Claim
27 words
A composition according to claim 4, wherein said nonconjugated diene is selected from the group consisting of 1,4-hexadiene, dicyclopentadiene, alkylidene substituted norbornenes, alkenyl substituted norbornenes and tetrahydroindene.
Claim 7
Dependent Claim
12 words
A composition according to claim 5, wherein said nonconjugated diene is 5-ethylidene-2-norbornene.
Claim 8
Dependent Claim
17 words
A composition according to claim 1, having a Shore A Hardness of about 30 to about 95.
Claim 9
Dependent Claim
29 words
A composition according to claim 1, wherein said preferential plasticizer is at a concentration level of less than about 40 wt. % based on said neutralized sulfonated elastomeric polymer.
Claim 10
Dependent Claim
29 words
A composition according to claim 8, wherein said preferential plasticizer is selected from the group consisting of carboxylic acids and metallic salts of said carboxylic acids and mixtures thereof.
Claim 11
Dependent Claim
57 words
A composition according to claim 8, wherein said preferential plasticizer is a combination of stearic acid and a metallic salt of said stearic acid, a metal ion of said metallic salt being selected from the group consisting of lead, antimony, aluminum, and Groups IA, IIA, IB and IIB of the Periodic Table of Elements and mixtures thereof.
Claim 12
Dependent Claim
19 words
A composition according to claim 1, wherein said filler has an oil absorption of about 10 to about 100.
Claim 13
Dependent Claim
25 words
A composition according to claim 1, wherein said non-polar process oil is selected from the group consisting of paraffinic, naphthenic and aromatics and mixtures thereof.
Claim 14
Dependent Claim
22 words
A composition according to claim 1, wherein said non-polar process oil is paraffinic having an Mn of about 400 to about 1000.
Claim 15
Dependent Claim
12 words
A composition according to claim 1, further including a crytalline polyolefinic thermoplastic.
Claim 16
Dependent Claim
31 words
A composition according to claim 14, wherein said polyolefinic thermoplastic is added at a concentration level of less than about 100 parts by weight per hundred parts of said sulfonated polymer.
Claim 17
Dependent Claim
18 words
A composition according to claim 13, wherein said polyolefinic thermoplastic has an Mn of about at least 5000.
Claim 18
Dependent Claim
30 words
A composition according to claim 1, further including a metallic oxide at a concentration level of less than about 25 parts by weight per hundred parts of said sulfonated polymer.
Claim 19
Dependent Claim
13 words
A composition according to claim 17, wherein said metal oxide is zinc oxide.
Claim 20
Dependent Claim
44 words
A composition according to claim 1, further including a metallic hydroxide at about less than 5 parts by weight per hundred parts of said sulfonated polymer, a metal ion of said metallic hydroxide being selected from the group consisting of calcium, magnesium and barium.
Claim 21
Dependent Claim
9 words
A composition of claim 1, further including a lubricant.
Claim 22
Dependent Claim
34 words
A composition of claim 20, wherein said lubricant is a crystalline hydrocarbon wax having a melting point of about 135° F. to about 220° F. and an Mn of about 1000 to about 4000.
Claim 23
Dependent Claim
11 words
A composition according to claim 1, further including an amorphous polypropylene.
Claim 24
Dependent Claim
28 words
A composition according to claim 10, wherein said metallic salt is selected from the group consisting of zinc stearate, barium stearate, lead stearate, magnesium stearate, and sodium stearate.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |