US4183841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filled composition containing phenol-aldehyde resin and butadiene-acrylonitrile polymer
Assignee: United States Department of the Navy
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Filing: 1965-07-16
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Granted: 1980-01-15
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Expires: 1985-07-16
Abstract
Abstract 1. An improved char and erosion resistant ablative thermal insulator composition, which can be used for flexible combustion chambers which comprises: (a) 70-140 parts by weight of a phenolic-aldehyde resin, (b) 40-100 parts by weight of a filler selected from the group consisting of Group I and II metal phosphates, carbonates, acetates, oxalates and sulfites, and (c) 100 parts by weight of a butadiene-acrylonitrile polymer having an acrylonitrile content between about 20 and 45%.
Inventors
- 👤 Rudolph J. Danowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:29
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
An improved char and erosion resistant ablative thermal insulator composition, which can be used for flexible combustion chambers which comprises: (a) 70-140 parts by weight of a phenolic-aldehyde resin, (b) 40-100 parts by weight of a filler selected from the group consisting of Group I and II metal phosphates, carbonates, acetates, oxalates and, sulfites, and (c) 100 parts by weight of a butadiene-acrylonitrile polymer having an acrylonitrile content between about 20 and 45%.
Claim 2
Dependent Claim
73 words
An improved char and erosion resistant ablative thermal insulator composition, which can be used for flexible combustion chambers which comprises: (a) 70-140 parts by weight of a phenolic-aldehyde resin, (b) 40-100 parts by weight of a filler selected from the group consisting of Group I and II metal phosphates, carbonates, acetates, oxalates and, sulfites, and (c) 100 parts by weight of a butadiene-acrylonitrile polymer having an acrylonitrile content between about 20 and 45%.
Claim 3
Dependent Claim
12 words
The insulator of claim 1 wherein said resin is a phenolic-formaldehyde resin.
Claim 4
Dependent Claim
11 words
The insulator of claim 1 wherein said filler is sodium acetate.
Claim 5
Dependent Claim
11 words
The insulator of claim 1 wherein said filler is potassium sulfite.
Claim 6
Dependent Claim
11 words
The insulator of claim 1 wherein said filler is potassium oxalate.
Claim 7
Dependent Claim
11 words
The insulator of claim 1 wherein said filler is sodium carbonate.
Claim 8
Dependent Claim
16 words
The insulator of claim 1 wherein 60 to 80 parts by weight of filler is present.
Claim 9
Dependent Claim
114 words
A process for forming an improved char and erosion resistant ablative thermal insulator which comprises: (a) forming a composition comprising a 100 parts by weight butadiene-acrylonitrile polymer having from 20-45% acrylonitrile, 40 to 100 parts by weight of a phenolic-aldehyde resin, and 70-140 parts by weight of a filler selected from the group consisting of Group I and II metal phosphates, carbonates, acetates, oxalates, and sulfites, and said composition being formed by the steps comprising, banding said copolymer, dispersing said resin in said copolymer at a temperature between about 140° and 300° F., and adding said filler to the mixture of the copolymer and resin, and (b) molding said composition to form the insulator.
Claim 10
Dependent Claim
114 words
A process for forming an improved char and erosion resistant ablative thermal insulator which comprises: (a) forming a composition comprising a 100 parts by weight butadiene-acrylonitrile polymer having from 20-45% acrylonitrile, 40 to 100 parts by weight of a phenolic-aldehyde resin, and 70-140 parts by weight of a filler selected from the group consisting of Group I and II metal phosphates, carbonates, acetates, oxalates, and sulfites, and said composition being formed by the steps comprising, banding said copolymer, dispersing said resin in said copolymer at a temperature between about 140° and 300° F., and adding said filler to the mixture of the copolymer and resin, and (b) molding said composition to form the insulator.
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |