Patent US2625848A successfully refreshed from Google Patents.
Patent US3890293A successfully refreshed from Google Patents.
US3890293A
Expired / Lapsed
US
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Method of producing aldehyde functional multi-component copolymers
Assignee: Bridgestone Corp
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Filing: 1972-05-23
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Granted: 1975-06-17
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Expires: 1992-05-23
Abstract
Abstract An aldehyde functional multi-component copolymer is produced by subjecting a multi-component copolymer having olefin bond units in the side chain or in the cyclic group in the main chain to ozonolysis and then reducing the resulting mixed peroxides into aldehyde functional groups. The aldehyde functional multicomponent copolymer is excellent to be used as base material, compounding agent, processing aid and adhesive in rubber industry.
Inventors
- 👤 Toshio Yukuta
- 👤 Takashi Ohashi
- 👤 Yoshiko Oguri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:08
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
59 words
AN ALDEHYDE FUNCTIONAL MULTI-COMPONENT COPOLYMER HAVING ALDEHYDE FUNCTIONAL GROUPS IN THE SIDE CHAIN OR IN THE CYCLIC GROUP IN THE MAIB CHAIN, WHICH IS OBTAINED BY SUBJECTING A MULTI-COMPONENT COPOLYMER COMPOSED OF 30-85 MOL % OF ETHYLENE, 15-70 MOL % OF PROPYLENE AND 1-10 MOL % OF AT LEAST ONE NON-CONJUGATED DIENE COMPOUND TO AN OZONOLYSIS IN A SOLVENT
Claim 2
Dependent Claim
59 words
AN ALDEHYDE FUNCTIONAL MULTI-COMPONENT COPOLYMER HAVING ALDEHYDE FUNCTIONAL GROUPS IN THE SIDE CHAIN OR IN THE CYCLIC GROUP IN THE MAIB CHAIN, WHICH IS OBTAINED BY SUBJECTING A MULTI-COMPONENT COPOLYMER COMPOSED OF 30-85 MOL % OF ETHYLENE, 15-70 MOL % OF PROPYLENE AND 1-10 MOL % OF AT LEAST ONE NON-CONJUGATED DIENE COMPOUND TO AN OZONOLYSIS IN A SOLVENT
Claim 3
Dependent Claim
19 words
The product as claimed in claim 1, wherein said multi-component copolymer is EPDM composed of ethylene, propylene and 1,4-hexadiene.
Claim 4
Dependent Claim
32 words
The product as claimed in claim 1, wherein said solvent is at least one member selected from the group consisting of halogenated hydrocarbons, aliphatic or cyclic ethers, aromatic hydrocarbons and aliphatic hydrocarbons.
Claim 5
Dependent Claim
19 words
The product as claimed in claim 1, wherein the ozonolysis temperature is within the range of -30* to +40*C.
Claim 6
Dependent Claim
41 words
The product as claimed in claim 1, wherein said trivalent phosphorus compound to be used as a reducing agent is used in an amount of 1.2 to 2.0 equivalents based on the equivalent of the mixed peroxides obtained by the ozonolysis.
Claim 7
Dependent Claim
23 words
The product as claimed in claim 1, wherein said trivalent phosphorus compound is selected from the group consisting of triphenylphosphine, triethylphosphite anad tris-(dimethylamino)phosphine.
Claim 8
Dependent Claim
27 words
The product as claimed in claim 1, wherein said solvent is at least one member selected from the group consisting of carbon tetrachloride, chloroform and methylene chloride.
Claim 9
Dependent Claim
19 words
The product as claimed in claim 1, wherein the ozonolysis temperature is within the range of -15* to +20*C.
Claim 10
Dependent Claim
14 words
The product as claimed in claim 5, wherein said trivalent phosphorus compound is triphenylphosphine.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |