Patent US3915928A successfully refreshed from Google Patents.
US3915928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection-moldable filled elastomeric composition
Assignee: EIDP Inc
•
Filing: 1974-11-29
•
Granted: 1975-10-28
•
Expires: 1994-11-29
Abstract
Abstract An elastomeric composition comprising a crystalline ethylene/propylene copolymer containing about 65-78% by weight ethylene units and, optionally, units of a monoreactive nonconjugated diene sufficient to provide up to 1 gram mole of carbon-carbon double bonds per kilogram of copolymer, said copolymer having an inherent viscosity of about 0.8-1.6, preferably about 1.0-1.4, about 40-150, preferably 50-100, parts by weight carbon black per 100 parts of the total copolymer composition, and about 5-30% by weight based on the weight of the total composition of glass fibers randomly dispersed throughout the composition. The composition when molded has a high modulus of elasticity and can be used in automotive trim application.
Inventors
- 👤 Henry Joachim Leibu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K7/00; C08K7/02; C08K7/04; C08K7/14
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
67 words
AN INJECTION MOLDABLE, CURABLE ELASTOMERIC COMPOSITION COMPRISING (A) A CRYSTALLINE ETHYLENE/PROPYLENE COPOLYMER CONTAINING ABOUT 65-78% BY WEIGHT ETHYLENE UNITS, SAID COPOLYMER HAVING AN INHERENT VISCOSITY OF ABOUT 1- 1.4, (B) ABOUT 75-150 PARTS BY WEIGHT CARBON BLACK PER 100 PARTS OF THE TOTAL COPOLYMER WEIGHT, AND (C) ABOUT 5-30% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL COMPOSITION OF GLASS FIBERS RANDOMLY DISPERSED THROUGHOUT THE COMPOSITION.
Claim 2
Dependent Claim
67 words
AN INJECTION MOLDABLE, CURABLE ELASTOMERIC COMPOSITION COMPRISING (A) A CRYSTALLINE ETHYLENE/PROPYLENE COPOLYMER CONTAINING ABOUT 65-78% BY WEIGHT ETHYLENE UNITS, SAID COPOLYMER HAVING AN INHERENT VISCOSITY OF ABOUT 1- 1.4, (B) ABOUT 75-150 PARTS BY WEIGHT CARBON BLACK PER 100 PARTS OF THE TOTAL COPOLYMER WEIGHT, AND (C) ABOUT 5-30% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL COMPOSITION OF GLASS FIBERS RANDOMLY DISPERSED THROUGHOUT THE COMPOSITION.
Claim 3
Dependent Claim
39 words
A composition of claim 1 wherein the copolymer contains units of a monoreactive nonconjugated diene having only one polymerizable double bond present in an amount sufficient to provide about 0.2-1 gram-mole of carbon-carbon double bonds per kilogram of copolymer.
Claim 4
Dependent Claim
19 words
A composition of claim 2 wherein units of the monoreactive nonconjugated diene are derived from 1,4-hexadiene or ethylidene norbornene.
Claim 5
Dependent Claim
49 words
A composition of claim 2 wherein the copolymer contains units derived from C5-C110 direactive diolefin having two polymerizable double bonds present in an amount resulting from the addition to the reaction mixture from which the copolymer is formed of about from 0.01-0.5 gram-mole per kilogram of said crystalline copolymer.
Claim 6
Dependent Claim
21 words
A composition of claim 4 containing about 10-20% by weight based on the weight of the total composition of glass fibers.
Claim 7
Dependent Claim
20 words
A composition of claim 4 wherein the copolymer contains units derived from C5-C22 direactive diolefin having two polymerizable double bonds.
Claim 8
Dependent Claim
19 words
A composition of claim 6 wherein units of the monoreactive nonconjugated diene in the copolymer are derived from 1,4-hexadiene.
Claim 9
Dependent Claim
20 words
A composition of claim 6 wherein units of the monoreactive nonconjugated diene in the copolymer are derived from ethylidene norbornene.
Claim 10
Dependent Claim
18 words
A composition of claim 6 wherein units of the direactive diolefin in the copolymer are derived from norbornadiene.
Claim 11
Dependent Claim
18 words
A composition of claim 7 wherein units of the direactive diolefin in the copolymer are derived from norbornadiene.
Claim 12
Dependent Claim
18 words
A composition of claim 10 wherein the glass fibers have an average length of from about 0.010-0.100 inch.
Claim 13
Dependent Claim
17 words
A composition of claim 1 wherein the crystalline ethylene/propylene copolymer contains about 68-74% by weight ethylene units.
Claim 14
Dependent Claim
65 words
A process for making an injection-moldable elastomeric composition comprising mixing a crystalline copolymer of ethylene and propylene containing about 65-78% by weight ethylene units, said copolymer having an inherent viscosity of about 1-1.4 with about 75-150 parts by weight carbon black per 100 parts of the total copolymer weight and about 5-30% by weight based on the weight of the total composition of glass fibers.
Claim 15
Dependent Claim
65 words
A process for making an injection-moldable elastomeric composition comprising mixing a crystalline copolymer of ethylene and propylene containing about 65-78% by weight ethylene units, said copolymer having an inherent viscosity of about 1-1.4 with about 75-150 parts by weight carbon black per 100 parts of the total copolymer weight and about 5-30% by weight based on the weight of the total composition of glass fibers.
Claim 16
Dependent Claim
41 words
A process of claim 13 wherein the crystalline copolymer contains units of a monoreactive nonconjugated diene having only one polymerizable double bond present in an amount sufficient to provide about 0.2-1 gram mole of carbon-carbon double bonds per kilogram of copolymer.
Claim 17
Dependent Claim
15 words
A process of claim 14 wherein the monoreactive nonconjugated diene is 1,4-hexadiene or ethylidene norbornene.
Claim 18
Dependent Claim
50 words
A process of claim 14 wherein the copolymer contains units derived from a C5-C110 direactive diolefin having two polymerizable double bonds present in an amount resulting from the addition to the reaction mixture from which the copolymer is formed of about from 0.01-0.5 gram-mole per kilogram of said crystalline copolymer.
Claim 19
Dependent Claim
16 words
A process of claim 16 wherein the copolymer contains units derived from a C5-C22 direactive diolefin.
Claim 20
Dependent Claim
29 words
A process of claim 17 wherein glass fibers are added to the mix in an amount of about 10-20% by weight based on the weight of the total composition.
Claim 21
Dependent Claim
16 words
A process of claim 17 wherein units of the monoreactive nonconjugated diene are derived from 1,4-hexadiene.
Claim 22
Dependent Claim
17 words
A process of claim 17 wherein units of the monoreactive nonconjugated diene are derived from ethylidene norbornene.
Claim 23
Dependent Claim
15 words
A process of claim 17 wherein units of the direactive diolefin are derived from norbornadienE.
Claim 24
Dependent Claim
15 words
A process of claim 19 wherein units of the direactive diolefin are derived from norbornadiene.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |