US3926901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sulfur vulcanizable oil extended elastomeric material and vulcanizates therefrom
Assignee: DSM Copolymer Inc
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Filing: 1973-09-17
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Granted: 1975-12-16
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Expires: 1993-09-17
Abstract
Abstract High Mooney, sulfur vulcanizable synthetic elastomers prepared by interpolymerizing a monomeric mixture containing ethylene, an alpha monoolefin having 3-16 carbon atoms and a 5-alkylidene-2norbornene having from 2-8 carbon atoms in the alkylidene group are oil extended by an improved method wherein the degree of unsaturation of the elastomer (greater than 3 carbon-to-carbon double bonds per 1,000 carbon atoms) and the amount of added oil are correlated to produce a relatively low Mooney, oil extended elastomer from which high quality vulcanizates may be prepared. A method is also provided for preparing high quality vulcanizates from the oil extended elastomeric material of the invention.
Inventors
- 👤 Charles E Boozer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:33
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A method of preparing an oil extended sulfur vulcanizable synthetic elastomeric material without corresponding reduction in tensile and modulus comprising admixing an extender oil with a synthetic elastomeric material in the form of an interpolymer prepared by interpolymerizing a monomeric mixture of ethylene, at least one monoethylenically unsaturated hydrocarbon having from 3-16 carbon atoms, and a 5-ethylidene-2-norbornene present in an amount to provide an initial unsaturation level of 5-25 C C groups per 1000 carbon atoms in the unextended sulfur vulcanizable synthetic elastomer and in which the unextended elastomeric material is also reacted to a high Mooney value of at least 80 at ML8 - 250*F, the extender oil being added in an amount within the range of 25-400 phr and is so adjusted to the original Mooney of at least 80 that the Mooney of the oil extended elastomeric material ranges between 40 and about 80.
Claim 2
Independent Claim
147 words
A method of preparing an oil extended sulfur vulcanizable synthetic elastomeric material without corresponding reduction in tensile and modulus comprising admixing an extender oil with a synthetic elastomeric material in the form of an interpolymer prepared by interpolymerizing a monomeric mixture of ethylene, at least one monoethylenically unsaturated hydrocarbon having from 3-16 carbon atoms, and a 5-ethylidene-2-norbornene present in an amount to provide an initial unsaturation level of 5-25 C C groups per 1000 carbon atoms in the unextended sulfur vulcanizable synthetic elastomer and in which the unextended elastomeric material is also reacted to a high Mooney value of at least 80 at ML8 - 250*F, the extender oil being added in an amount within the range of 25-400 phr and is so adjusted to the original Mooney of at least 80 that the Mooney of the oil extended elastomeric material ranges between 40 and about 80.
Claim 3
Dependent Claim
125 words
THE OIL EXTENDED SULFUR VULCANIZABLE ELASTOMERIC EPDM IN WHICH AN EXTENDER OIL IS ADMIXED WITH AN EPDM PREPARED BY INTERPOLYMERIZING A MONNOMERIC MIXTURE OF ETHYLENE, AT LEAST ONE MONOETHYLENICALLY UNSATURATED HYDROCARBON HAVING FROM 3-16 CARBON ATOMS AND 5-ETHYLIDENE-2-NORBORNENE PRESENT IN AN AMOUNT TO PROVIDE AN INITAL UNSATURATION LEVEL OF D5-25 C=C GROUPS PER 1,000 CARBON ATOMS IN THE UNEXTENDED SULFUR VULCANIZABLE EPDM AND IN WHICH THE UNEXTENDED EPDM IS ALSO REACTED TO A HIGH MOONEY VALUE OF AT LEAST 80 ML8 - 250*F THE EXTENDER OIL BEING ADDED IN AN AMOUNT WITHIN THE RANGE OF 25-D400 PHR AND IS SO ADJUSTED TO THE ORIGI NAL MOONEY OF AT LAST 80 THAT THE MOONEY OF THE OIL EXTENDED ELASTOMERIC MATERIAL RANGES BETWEEN 40 AND ABOUT 80.
Claim 4
Dependent Claim
125 words
THE OIL EXTENDED SULFUR VULCANIZABLE ELASTOMERIC EPDM IN WHICH AN EXTENDER OIL IS ADMIXED WITH AN EPDM PREPARED BY INTERPOLYMERIZING A MONNOMERIC MIXTURE OF ETHYLENE, AT LEAST ONE MONOETHYLENICALLY UNSATURATED HYDROCARBON HAVING FROM 3-16 CARBON ATOMS AND 5-ETHYLIDENE-2-NORBORNENE PRESENT IN AN AMOUNT TO PROVIDE AN INITAL UNSATURATION LEVEL OF D5-25 C=C GROUPS PER 1,000 CARBON ATOMS IN THE UNEXTENDED SULFUR VULCANIZABLE EPDM AND IN WHICH THE UNEXTENDED EPDM IS ALSO REACTED TO A HIGH MOONEY VALUE OF AT LEAST 80 ML8 - 250*F THE EXTENDER OIL BEING ADDED IN AN AMOUNT WITHIN THE RANGE OF 25-D400 PHR AND IS SO ADJUSTED TO THE ORIGI NAL MOONEY OF AT LAST 80 THAT THE MOONEY OF THE OIL EXTENDED ELASTOMERIC MATERIAL RANGES BETWEEN 40 AND ABOUT 80.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein about 25-400 parts by weight of the extender oil are added for each 100 parts by weight of the elastomeric material.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the unextended elastomeric material has a Mooney plasticity of about 80-250 ML8 at 250F.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |