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US4011378A Expired / Lapsed US ⏱️ 0.0 years remaining

Aromatized polyacetylenes

Assignee: General Electric Co
•
Filing: 1972-06-29
•
Granted: 1977-03-08
•
Expires: 1992-06-29
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Abstract

Abstract Polyacetylenes, either homopolymers or copolymers, are rendered more soluble and/or more thermally stable without destroying their film-forming properties and with minimal decrease in their high carbon content by reacting them with one or more 2,3,4,5-tetrasubstituted cyclopentadiones commonly called tetracyclones. These latter compounds, together with the acetylenic groups of the polymer, undergo a cyclization reaction to produce a 3,4,5,6-tetrasubstituted 1,2-phenylene moiety in the polymer backbone. Because of their high thermal stability these polymers are especially useful as binders for graphite fibers in making graphite composites or to produce films or coatings for high temperature applications.

Inventors

  • 👤 Dwain M. White

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 03:59
CPC Classifications
C; C08; C08L; C08L49/00; C08F; C08F8/00

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 45 words
A polymer all of whose repeating units have the formula ##STR12## wherein each R'" is the residue other than an ethynylene group of a solvent-soluble polyacetylene, each R', independently, is lower alkyl, lower alkoxycarbonyl, phenyl or halophenyl and each R", independently, is phenyl or halophenyl.
Claim 2
Dependent Claim 45 words
A polymer all of whose repeating units have the formula ##STR12## wherein each R'" is the residue other than an ethynylene group of a solvent-soluble polyacetylene, each R', independently, is lower alkyl, lower alkoxycarbonyl, phenyl or halophenyl and each R", independently, is phenyl or halophenyl.
Claim 3
Dependent Claim 19 words
The polymers of claim 1, wherein each R', individually, is phenyl or lower alkyl and each R" is phenyl.
Claim 4
Dependent Claim 13 words
The polymers of claim 2, wherein each R' and each R" are phenyl.
Claim 5
Dependent Claim 12 words
The polymers of claim 1, wherein R'" is m-phenylene, p-phenylene or ##STR13##
Claim 6
Dependent Claim 21 words
The polymers of claim 1, wherein, of the total R'" groups, 1-25% are p-phenylene, 60-99% are m-phenylene and 0-35% are ##STR14##
Claim 7
Dependent Claim 16 words
The polymers of claim 5, wherein each R' is lower alkoxycarbonyl and each R" is phenyl.
Claim 8
Dependent Claim 16 words
The polymers of claim 5, wherein each R' is lower alkyl and each R" is phenyl.
Claim 9
Dependent Claim 13 words
The polymers of claim 5, wherein each R' and each R" are phenyl.

References Cited (Backward Citations)

US3300456A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-03-07 1980-09-06 1981-03-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-03-07 1984-09-06 1985-03-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-03-07 1988-09-06 1989-03-08 $7700.00 Window Closed / Lapsed

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