US3923622A
Expired / Lapsed
US
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Cyclically-bound ladder polymers of cyclic diacetylene tetramers
Assignee: Honeywell International Inc
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Filing: 1974-08-13
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Granted: 1975-12-02
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Expires: 1994-08-13
Abstract
Abstract Cyclically-bound ladder polymers obtained from cyclic tetramers having the formula (C*C - (CH2)n - C*C4 wherein n is an integer from 3 to 10. Polymerization proceeds by 1,4-addition reaction at each diacetylene group to produce four fully-conjugated chains joined together pairwise via a total of four -(CH2)n - interchain linkages per 4.8A. polymer repeat length. Resulting from the particular crystal phases used as reaction matrices, these polymers are substantially free of unreacted diacetylene groups, as indicated by substantial absence of Raman vibration at about 2255 cm 1, and are highly chain aligned.
Inventors
- 👤 Ray H Baughman
- 👤 Kwok Chun Yee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:57
CPC Classifications
C; C08; C08F; C08F138/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
SOLID CYCLICALLY-BOUND LADDR HOMOPOLYMERS OF CYCLIC TETRAMERS OF TERMINAL DIACETYLENES HAVING THE FORMULA C<(-(C*C-(CH2)N-C*C)3-C*C-(CH2)N-C*) WHEREIN N IS AN INTEGER OF FROM 3 TO 10, BEING SUBSTANTIALLY FREE OF UNREACTED DIACETYLENE GROUPS AS INDICATED BY SUBSTANTIAL ABSENCE OF RAMAN VIBRATION AT ABOUT 2255 CM-1.
Claim 2
Dependent Claim
43 words
SOLID CYCLICALLY-BOUND LADDR HOMOPOLYMERS OF CYCLIC TETRAMERS OF TERMINAL DIACETYLENES HAVING THE FORMULA C<(-(C*C-(CH2)N-C*C)3-C*C-(CH2)N-C*) WHEREIN N IS AN INTEGER OF FROM 3 TO 10, BEING SUBSTANTIALLY FREE OF UNREACTED DIACETYLENE GROUPS AS INDICATED BY SUBSTANTIAL ABSENCE OF RAMAN VIBRATION AT ABOUT 2255 CM-1.
Claim 3
Dependent Claim
36 words
Solid cyclically-bound ladder homopolymers according to claim 1 of cyclic tetramers of terminal diacetylenes having the formula (C * C - (CH2)n - C * C)4 wherein n is an integer of from 4 to 6.
Claim 4
Dependent Claim
27 words
Solid cyclically-bound ladder homopolymers according to claim 1 of cyclic tetramer of a terminal diacetylene having the formula (C * C - (CH2)4 - C * C)4
Claim 5
Dependent Claim
99 words
The method for making solid cyclically-bound ladder homopolymers according to claim 1 which comprises the steps of a. recrystallizing a cyclic tetramer of a terminal diacetylene having the formula (C * C - (CH2)n - C * C)4 wherein n is an integer of from 3 to 10 from chloroform or mixtures of inert solvents with benzene or chloroform to obtain the cyclic tetramer as crystals with predominantly needle-like habit containing interstitially incorporated benzene or chloroform, and b. subjecting these crystals containing interstitially incorporated benzene or chloroform to actinic radiation, heat or mechanical stress to effect solid state polymerization.
Claim 6
Dependent Claim
50 words
The method of claim 4 wherein the cyclic tetramer is recrystallized from chloroform or mixtures of inert solvents with chloroform containing at least about 25 percent by volume of chloroform, and wherein solid-state polymerization is effected by subjecting the crystals of the monomer containing interstitially incorporated chloroform to actinic radiation.
Claim 7
Dependent Claim
25 words
The method of claim 5 wherein the cyclic tetramer of a terminal diacetylene has the formula (C * C - (CH2)4 - C * C)4
Claim 8
Dependent Claim
24 words
The method of claim 4 wherein the inert solvent is at least one selected from the group consisting of petroleum ether, n-hexane and n-heptane.
Claim 9
Dependent Claim
35 words
The method of claim 4 wherein a mixture of an inert solvent containing at least about 25 percent by volume of benzene or chloroform but less than 50 percent by volume of benzene is employed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |