Patent US6265771B1 successfully refreshed from Google Patents.
US3872192A
Expired / Lapsed
US
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Wet process for compounding polymer-solids compositions
Assignee: United States Department of the Navy
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Filing: 1970-08-07
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Granted: 1975-03-18
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Expires: 1990-08-07
Abstract
Abstract A wet process for compounding polymers which comprises forming a paste consisting of solid ingredients such as oxidizers and metal powder, a rubber polymer and low boiling hydrocarbon; extruding said paste through a plastic or metal tube provided with a multiperforated nozzle and a plastic plunger whereby strands are formed; and dropping said strands through a current of warm air or warm inert gas whereby said strands are dry to the touch as they fall to the bottom of said cylinder. This process provides compositions which are homogeneous and the solid ingredients are retained within the polymer-solid composition.
Inventors
- 👤 Martin H Kaufman
- 👤 Edward M Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:58
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; C06; C06B; C06B21/00; C06B21/0033; C06B21/0075; C08J3/20; C08J3/205; C08J3/21; C08J3/212
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A PROCESS FOR COMPOUNDING POLYMER-SOLIDS COMPOSITIONS WHICH COMPRISES THE STEP OF: A. FORMING A SOLUTION BY DISSOLVING A POLYMER WHICH IS SOLUBLE IN A VOLATILE SOLVENT WHICH WILL DISSOLVE THE POLYMER, B. FORMING A PASTE BY ADDING SOLID PARTICLES SELECTED FROM THE GROUP CONSISTING OF SOLID OXIDIZER PARTICLES, SOLID METAL PARTICLES, SOLID HIGH EXPLOSIVE PARTICLES, SOLID FLUOROCARBON PARTICLES AND MIXTURES THEREOF TO SAID SOLUTION, C. EXTRUDING SAID PASTE THROUGH A DIE HAVING A DIAMETER AT LEAST AS LARGE AS THE MIXIMUM DIAMETER OF SAID SOLID PARTICLES, AND D. PASSING THE EXTRUDED PASTE THROUGH CURRENT OF WARM AIR.
Claim 2
Dependent Claim
97 words
A PROCESS FOR COMPOUNDING POLYMER-SOLIDS COMPOSITIONS WHICH COMPRISES THE STEP OF: A. FORMING A SOLUTION BY DISSOLVING A POLYMER WHICH IS SOLUBLE IN A VOLATILE SOLVENT WHICH WILL DISSOLVE THE POLYMER, B. FORMING A PASTE BY ADDING SOLID PARTICLES SELECTED FROM THE GROUP CONSISTING OF SOLID OXIDIZER PARTICLES, SOLID METAL PARTICLES, SOLID HIGH EXPLOSIVE PARTICLES, SOLID FLUOROCARBON PARTICLES AND MIXTURES THEREOF TO SAID SOLUTION, C. EXTRUDING SAID PASTE THROUGH A DIE HAVING A DIAMETER AT LEAST AS LARGE AS THE MIXIMUM DIAMETER OF SAID SOLID PARTICLES, AND D. PASSING THE EXTRUDED PASTE THROUGH CURRENT OF WARM AIR.
Claim 3
Dependent Claim
22 words
The process according to claim 1 wherein the paste consists essentially of butyl rubber in a low boiling hydrocarbon and ammonium perchlorate.
Claim 4
Dependent Claim
20 words
The process according to claim 1 wherein the paste consists essentially of ethylene-propylene dissolved in hexane, magnesium powder, and polytetrafluoroethylene.
Claim 5
Dependent Claim
24 words
The process according to claim 1 wherein the solids consist essentially of the copolymer of vinylidene fluoride and perfluoropropene, aluminum, polytetrafluoroethylene and ammonium perchlorate.
Claim 6
Dependent Claim
22 words
The process according to claim 1 wherein the paste consists essentially of butyl rubber dissolved in low boiling petroleum ether and cyclotrimethylenetrinitramine.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |