US4172188A
Expired / Lapsed
US
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Difunctional polymers with terminal hydrazide groups
Assignee: Bayer AG
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Filing: 1973-03-15
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Granted: 1979-10-23
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Expires: 1993-03-15
Abstract
Abstract Linear telechelic diene polymers with molecular weights of about 300 to about 20,000 which contain hydrazide end groups and to a process for their preparation as well as to their use for synthesizing high molecular weight polymers.
Inventors
- 👤 Gerhard Balle
- 👤 Gunter Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/696; C08C; C08C19/00; C08C19/30; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A linear telechelic diene polymer having hydrazide terminal groups and a molecular weight of about 300-20,000, the polymer chain thereof consisting of a homopolymer of a non-cyclic conjugated 1,3-diene having 4 to 6 carbon atoms or a copolymer of a non-cyclic conjugated diene having 4 to 6 carbon atoms and an ethylenically unsaturated compound selected from the group consisting of styrene, vinyl toluene, alkoxy styrene having up to 3 carbon atoms in the alkoxy moiety, halogenated styrene, nitriles of acrylic and methacrylic acid and alkyl esters of acrylic and methacrylic acid having from 1 to 6 carbon atoms in the alkyl moiety, said copolymer containing said ethylenically unsaturated compound in an amount of up to 50 mol % and the terminal groups of said linear telechelic diene polymer being of the formula ##STR10## where R is alkyl having 1 to 4 carbon atoms, R' is hydrogen or alkyl having 1 to 4 carbon atoms and R" is hydrogen, alkyl having 1 to 4 carbon atoms or phenyl.
Claim 2
Dependent Claim
167 words
A linear telechelic diene polymer having hydrazide terminal groups and a molecular weight of about 300-20,000, the polymer chain thereof consisting of a homopolymer of a non-cyclic conjugated 1,3-diene having 4 to 6 carbon atoms or a copolymer of a non-cyclic conjugated diene having 4 to 6 carbon atoms and an ethylenically unsaturated compound selected from the group consisting of styrene, vinyl toluene, alkoxy styrene having up to 3 carbon atoms in the alkoxy moiety, halogenated styrene, nitriles of acrylic and methacrylic acid and alkyl esters of acrylic and methacrylic acid having from 1 to 6 carbon atoms in the alkyl moiety, said copolymer containing said ethylenically unsaturated compound in an amount of up to 50 mol % and the terminal groups of said linear telechelic diene polymer being of the formula ##STR10## where R is alkyl having 1 to 4 carbon atoms, R' is hydrogen or alkyl having 1 to 4 carbon atoms and R" is hydrogen, alkyl having 1 to 4 carbon atoms or phenyl.
Claim 3
Dependent Claim
68 words
A linear telechelic diene polymer of claim 1 having the formula ##STR11## ps wherein R is alkyl having 1 to 4 carbon atoms, R' is hydrogen or alkyl having 1 to 4 carbon atoms, R" is hydrogen, alkyl having 1 to 4 carbon atoms or a phenyl radical, R 3 and R 4 independently are hydrogen, methyl or chlorine and n is a number from 1 to 370.
Claim 4
Dependent Claim
120 words
A linear telechelic diene polymer of claim 1 having the formula ##STR12## wherein R is alkyl having 1 to 4 carbon atoms, R' is hydrogen or alkyl having 1 to 4 carbon atoms, R" is hydrogen or alkyl having 1 to 4 carbon atoms, Q is a polymer chain made up of radicals Q 1 and Q 2 with a molar ratio of Q 1 :Q 2 of 10:1 to 1:1 with any distribution of Q 1 and Q 2 within the polymer chain, Q 1 being ##STR13## Q 2 being ##STR14## the number of connected radicals Q 1 and Q 2 being from 2 to about 370 and R 3 and R 4 independently are hydrogen, methyl or chlorine.
Claim 5
Dependent Claim
88 words
A linear telechelic diene polymer of claim 1 having the formula ##STR15## wherein R is alkyl having 1 to 4 carbon atoms, R' is hydrogen or alkyl having 1 to 4 carbon atoms, R' is hydrogen or alkyl having 1 to 4 carbon atoms, R" is hydrogen of alkyl having 1 to 4 carbon atoms, R 3 and R 4 independently are hydrogen, methyl or chlorine, m is an integer of from 1 to 250 and wherein the monomer units within the square brackets may have any distribution.
Claim 6
Dependent Claim
25 words
A linear telechelic diene polymer of claim 1 wherein said non-cyclic conjugated 1,3-diene is selected from the group consisting of butadiene, isoprene, chloroprene, and 2,3-dimethyl-butadiene-(1,3).
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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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |