US4645791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environmentally durable elastomer composition with excellent low temperature dynamic properties
Assignee: Michigan Technological University
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Filing: 1985-06-24
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Granted: 1987-02-24
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Expires: 2005-06-24
Abstract
Abstract This invention relates to an environmentally durable composition which has excellent low temperature dynamic properties. The composition comprises a substantially homogeneous mixture of 100 parts by weight elastomer having a fully saturated backbone, curing agent for the elastomer in amounts sufficient to crosslink the elastomer, reinforcing particulate filler and at least 20 parts by weight of an aliphatic oil. The aliphatic oil modifies the low temperature dynamic properties of the elastomer. Particulate graphite may be incorporated into the composition to lower its friction.
Inventors
- 👤 Ares N. Theodore
- 👤 Paul C. Killgoar, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08L; C08L23/00; C08L23/02; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08L7/00; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
95 words
An elastomer composition comprising a substantially homogeneous mixture of: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in amount sufficient to crosslink said elastomer; and (c) reinforcing particulate filler; said composition further comprising at least 20 parts by weight oil, substantially all oil included in said composition being selected from aliphatic oils and having a number of average molecular weight (M n ) of between about 250 and about 1500, and wherein at least 90% by weight of said oil boils above about 200° C.
Claim 2
Dependent Claim
95 words
An elastomer composition comprising a substantially homogeneous mixture of: (a) 100 parts by weight of elastomer having a fully saturated backbone; (b) curing agent for said elastomer in amount sufficient to crosslink said elastomer; and (c) reinforcing particulate filler; said composition further comprising at least 20 parts by weight oil, substantially all oil included in said composition being selected from aliphatic oils and having a number of average molecular weight (M n ) of between about 250 and about 1500, and wherein at least 90% by weight of said oil boils above about 200° C.
Claim 3
Dependent Claim
22 words
An elastomer composition according to claim 1, wherein greater than 98% by weight of said aliphatic oil boils above about 200° C.
Claim 4
Dependent Claim
38 words
An elastomer composition according to claim 1, wherein said aliphatic oil is included in said composition in an amount of between about 30 and about 90 parts by weight based on 100 parts by weight of said elastomer.
Claim 5
Dependent Claim
26 words
An elastomer composition according to claim 1, wherein said oil has a number average molecular weight (M n ) of between about 350 and about 700.
Claim 6
Dependent Claim
31 words
An elastomer composition according to claim 1, wherein said aliphatic oil is selected from (i) synthetic paraffinic mineral oils, (ii) synthetic paraffinic mineral oil based engine oils, and (iii) blends thereof.
Claim 7
Dependent Claim
29 words
An elastomer composition according to claim 5, wherein said aliphatic oil is selected from synthetic hydrocarbon basestock lubricating oils and engine oils based on synthetic hydrocarbon basestock lubricating oils.
Claim 8
Dependent Claim
19 words
An elastomer composition according to claim 1, wherein said reinforcing particulate filler is selected from organic and inorganic particulate.
Claim 9
Dependent Claim
17 words
An elastomer composition according to claim 1, further comprising at least 20 parts by weight particulate graphite.
Claim 10
Dependent Claim
14 words
An elastomer composition according to claim 8, wherein said reinforcing particulate comprises carbon black.
Claim 11
Dependent Claim
22 words
An elastomer composition according to claim 9, wherein said composition comprises between about 15 and about 100 parts by weight carbon black.
Claim 12
Dependent Claim
20 words
An elastomer composition according to claim 8, wherein greater than 98% of said aliphatic oil boils above about 200° C.
Claim 13
Dependent Claim
26 words
An elastomer composition according to claim 8, wherein said oil has a number average molecular weight (M n ) of between about 350 and about 700.
Claim 14
Dependent Claim
18 words
An elastomer composition according to claim 8, wherein said elastomer having a fully saturated backbone comprises ethylene-propylene-diene rubber.
Claim 15
Dependent Claim
20 words
An elastomer composition according to claim 13, wherein said curing agent for said elastomer comprises an accelerated sulfur curing system.
Claim 16
Dependent Claim
24 words
An elastomer composition according to claim 13, wherein said composition comprises between about 20 and about 100 parts by weight of said aliphatic oil.
Claim 17
Dependent Claim
31 words
An elastomer composition according to claim 15, wherein said aliphatic oil is selected from (i) synthetic paraffinic mineral oils, (ii) synthetic paraffinic mineral oil based engine oils, and (iii) blends thereof.
Claim 18
Dependent Claim
29 words
An elastomer composition according to claim 15, wherein said aliphatic oils are selected from synthetic hydrocarbon basestock lubricating oils and engine oils based on synthetic hydrocarbon basestock lubricating oils.
Claim 19
Dependent Claim
111 words
An elastomer composition suitable for use as windshield wiper material, which composition comprises a substantially homogeneous mixture of: (a) 100 parts by weight ethylene-propylene-diene elastomer; (b) curing agent for said elastomer; (c) between about 15 and 100 parts by weight carbon black; and (d) between about 20 and about 100 parts by weight particulate graphite; said composition further comprising between about 20 and about 100 parts by weight oil, substantially all oil included in said composition being selected from aliphatic oils and having a number average molecular weight (Mn) of between about 250 and about 1500, and wherein at least 90% by weight of said oil boils above about 200° C.
Claim 20
Dependent Claim
111 words
An elastomer composition suitable for use as windshield wiper material, which composition comprises a substantially homogeneous mixture of: (a) 100 parts by weight ethylene-propylene-diene elastomer; (b) curing agent for said elastomer; (c) between about 15 and 100 parts by weight carbon black; and (d) between about 20 and about 100 parts by weight particulate graphite; said composition further comprising between about 20 and about 100 parts by weight oil, substantially all oil included in said composition being selected from aliphatic oils and having a number average molecular weight (Mn) of between about 250 and about 1500, and wherein at least 90% by weight of said oil boils above about 200° C.
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |