Patent US3974121A successfully refreshed from Google Patents.
US3974121A
Expired / Lapsed
US
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Branched nitropolyphenylenes and compositions therefrom
Assignee: BP Corp North America Inc
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Filing: 1975-11-25
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Granted: 1976-08-10
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Expires: 1995-11-25
Abstract
Abstract Branched nitropolyphenylene resins are disclosed which have a substantial degree of branching. Also disclosed is a polyphenylene resin mixture comprising branched nitropolyphenylenes and branched soluble polyphenylenes. This resin mixture is used to prepare asbestos, glass, carbon and graphite fiber composites.
Inventors
- 👤 Chen-Shen Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:46
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/10; C08L; C08L65/00; C08L65/02; C08G2261/00; C08G2261/30; C08G2261/31; C08G2261/312
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
67 words
A branched nitropolyphenylene comprising benzene ring structures bonded into a polymer chain and from 0.25 to 15 percent by weight of nitrogen wherein infrared absorbance occurs at frequencies of about 1,345 cm.sup. -1 and about 1,525 cm.sup. -1 and at least 8% of the linear infrared absorbance spectrum integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 865-930 cm.sup. -1 .
Claim 2
Dependent Claim
67 words
A branched nitropolyphenylene comprising benzene ring structures bonded into a polymer chain and from 0.25 to 15 percent by weight of nitrogen wherein infrared absorbance occurs at frequencies of about 1,345 cm.sup. -1 and about 1,525 cm.sup. -1 and at least 8% of the linear infrared absorbance spectrum integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 865-930 cm.sup. -1 .
Claim 3
Dependent Claim
93 words
The nitropolyphenylene of claim 1 wherein the linear infrared absorbance spectrum integrated peak area within the frequency range 726-930 cm.sup. -1 is distributed as follows: from 8 to 22% of the integrated peak area is within the frequency range 865-930 cm.sup. -1 , from 20 to 45% is within the frequency range 806-864 cm.sup. -1 , from 7 to 20% is within the frequency range 778-805 cm.sup. -1 , and the remainder of the integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 726-777 cm.sup. -1 .
Claim 4
Dependent Claim
18 words
The nitropolyphenylene of claim 2 wherein from 0.50 to 5.0 percent by weight of the nitropolyphenylene is nitrogen.
Claim 5
Dependent Claim
92 words
The nitropolyphenylene of claim 1 wherein the linear infrared absorbance spectrum integrated peak area within the frequency range 726-930 cm.sup. -1 is distributed as follows: from 12 to 20% of the integrated peak area within the frequency range 865-930 cm.sup. -1 , from 25 to 40% is within the frequency range 806-864 cm.sup. -1 , from 10 to 18% is within the frequency range 778-805 cm.sup. -1 , and the remainder of the integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 726-777 cm.sup. -1 .
Claim 6
Dependent Claim
18 words
The nitropolyphenylene of claim 4 wherein from 0.50 to 5.0 percent by weight of the nitropolyphenylene is nitrogen.
Claim 7
Dependent Claim
59 words
A resin mixture comprising (a) a branched polyphenylene comprising benzene ring structures bonded into a polymer chain wherein at least 7% of the linear infrared absorbance spectrum integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 854-930 cm.sup. -1 and (b) from 5 to 50% by weight of the nitropolyphenylene of claim 1.
Claim 8
Dependent Claim
19 words
The resin mixture of claim 6 wherein from 25 to 40% by weight of the mixture is the nitropolyphenylene.
Claim 9
Dependent Claim
119 words
A resin mixture comprising (a) a branched polyphenylene comprising benzene ring structures bonded into a polymer chain wherein the linear infrared absorbance spectrum integrated peak area within the frequency range 720-930 cm.sup. -1 is distributed as follows: from 10 to 18% of the integrated peak area is within the frequency range 854-930 cm.sup. -1 , from 15 to 30% is within the frequency range 806-853 cm.sup. -1 , from 13 to 20% is within the frequency range 778-805 cm.sup. -1 , and the remainder of the integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 726-777 cm.sup. -1 ; and (b) from 5 to 50% by weight of the nitropolyphenylene of claim 2.
Claim 10
Dependent Claim
19 words
The resin mixture of claim 8 wherein from 0.50 to 5.0 percent by weight of the nitropolyphenylene is nitrogen.
Claim 11
Dependent Claim
19 words
The resin mixture of claim 8 wherein from 25 to 40% by weight of the mixture is the nitropolyphenylene.
Claim 12
Dependent Claim
33 words
A high temperature resistant composite comprising a fiber selected from the group consisting of glass, graphite and carbon and from 15 to 55 percent by weight of the resin mixture of claim 6.
Claim 13
Dependent Claim
33 words
A high temperature resistant composite comprising a fiber selected from the group consisting of glass, graphite and carbon and from 15 to 55 percent by weight of the resin mixture of claim 8.
Claim 14
Dependent Claim
73 words
A high temperature resistant composite comprising asbestos fiber and from 15 to 55 wt.% of a resin mixture comprising (a) a branched polyphenylene comprising benzene ring structures bonded onto a polymer chain where at least 7% of the linear infrared absorbance spectrum integrated peak area with the frequency range 726-930 cm.sup. -1 is within the frequency range 854-930 cm.sup. -1 and (b) from 0 to 50 wt.% of the nitropolyphenylene of claim 1.
Claim 15
Dependent Claim
28 words
The composite of claim 13 wherein the resin mixture contains a branched polyphenylene having an inherent viscosity between about 0.7 and 0.12 and less than 5 wt.% nitropolyphenylene.
Claim 16
Dependent Claim
27 words
The composite of claim 13 wherein the resin mixture contains a branched polyphenylene having an inherent viscosity less than about 0.7 and 5 to 50 wt.% nitropolyphenylene.
Claim 17
Dependent Claim
131 words
A high temperature resistant composite comprising asbestos fiber and from 15 to 55% of a resin mixture comprising (a) a branched polyphenylene comprising benzene ring structures bonded into a polymer chain wherein the linear infrared absorbance spectrum integrated peak area within the frequency range 726-930 cm.sup. -1 is distributed as follows: from 10 to 18% of the integrated peak area is within the frequency range 854-930 cm.sup. -1 , from 15 to 30% is within the frequency range 806-853 cm.sup. -1 , from 13 to 20% is within the frequency range 778-806 cm.sup. -1 , and the remainder of the integrated peak area within the frequency range 726-930 cm.sup. -1 is within the frequency range 726-777 cm.sup. -1 and (b) from 0 to 50 wt.% of the nitropolyphenylene of claim 2.
Claim 18
Dependent Claim
28 words
The composite of claim 16 wherein the resin mixture contains a branched polyphenylene having an inherent viscosity between about 0.7 and 0.12 and less than 5 wt.% nitropolyphenylene.
Claim 19
Dependent Claim
27 words
The composite of claim 16 wherein the resin mixture contains a branched polyphenylene having an inherent viscosity less than about 0.7 and 5 to 50 wt.% nitropolyphenylene.
Claim 20
Dependent Claim
13 words
The composite of claim 13 containing about 5 to 15 wt.% barium sulfate.
Claim 21
Dependent Claim
13 words
The composite of claim 16 containing about 5 to 15 wt.% barium sulfate.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |