US2833664A - Sealing putty - Google Patents
Sealing putty Download PDFInfo
- Publication number
- US2833664A US2833664A US349565A US34956553A US2833664A US 2833664 A US2833664 A US 2833664A US 349565 A US349565 A US 349565A US 34956553 A US34956553 A US 34956553A US 2833664 A US2833664 A US 2833664A
- Authority
- US
- United States
- Prior art keywords
- metal
- particles
- putty
- composition
- density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
Definitions
- This invention relates to putty-like compositions and particularly to the combination of a metallic powder with a suitable vehicle to form a plastic mixture to act as a sealing putty for cracks, crevices and the like.
- the object of the invention is to provide a metal-carrying putty concentrating the metallic content to high density to serve as an effective barrier and seal against injurious radiations.
- the metallic putty of my invention supplies an inexpensive, convenient and reliable seal for these openings, simplifying the original structure and avoiding the necessity of costly time-consuming repair where leaks develop in use.
- a metallic powder of pro tective ray-absorbing metal such as lead
- an oil or grease acting to coat the individual particles.
- 15% of Texas Company Crater grease, a semi-fluid lubricant is mixed with 85% of lead powder by weight, the powder preferably being minus 200 mesh to give a thorough thin filming of the powder particles.
- the resulting lead-vehicle mixture would normally have a density much below that of the metal and not sufiicient to satisfactorily prevent the escape of harmful radiation; and I have found that a greatly improved product may be obtained by increased density providing a correspondingly more effective and reliable barrier to the rays.
- the desired increase in density is attained by working of the mixture to agglomerate the lead powder particles forcing them to coalesce together and compacting the mixture and presenting a greatly increased ray absorption for a given thickness of the putty barrier. This increase is critical and renders the putty usable in situations where it would otherwise fail.
- a normal lead putty mixture of the above ingredients having a density of 6.5 after running through an extrusion under high pressure of five hundred pounds per square inch, has its density increased to over 9 and the resulting putty on microscopic examination shows its lead particles in agglomerates of various groupings in which many of the lead particles are in metal to metal contact. Under the pressure applied the grease films on the particle surfaces have been squeezed to extreme thinness and even ruptured either forming a film bond between the adjacent particles or establishing a bond of metal to metal.
- agglomerating procedures such as beating, grinding, hammering and the like may be employed depending on the materials and quantities involved.
- the important object is to bring the density of the putty as high as possible While still maintaining its pliancy so that it may be pressure-shaped into the cracks and crevices to be filled.
- the number of particles involve-d in the agglornerates will vary widely and the individual agglomerates themselves are intermediately malleable in that, while firmer than the particle-vehicle mixture, they are more plastic than the solid lead.
- the powders of other metals such as tungsten may be used, or mixtures thereof may be resorted to where, for instance, the softer acts as a bonding between the others.
- the precise proportions between the metal powder and the binder material are not critical, the objective being to employ as much powder as is practicaL.
- the oil or grease used should be only sufficient to give a putty-like mass of proper plasticity and a structure which will hold together and can be applied as putty is used to fill cracks, crevices, seams, etc.
- the high density is the important criterion, reflecting as it does the necessary agglomeration of the great mass of the metal particles into aggregates in which the particles are closely bound together.
- the binding forces between the particle surfaces will be thin molecular layers of the oil or grease material and also, preferably in larger part, the cohesion of the metal to metal contact of the metal surfaces as they are forced together by the compressing action of the extrusion, beating, hammering or the like.
- the resulting structure presents a cooperative barrier action between the thus aggregated metal particles, greatly augmenting the efliciency of the absorption and simplifying the application of the putty and reducing the expense involved.
- the extruded formations may dispense with the binder and the degree of compression will be controlled by the temperature and the intensity of the pressures applied, the metallic surface skin being developed as a containing envelope.
- the temperature and the intensity of the pressures applied such extrusion may be carried on at room temperatures.
- it is desirable to raise the temperature for instance, to about the recrystallization level such as 150 C. for aluminum and magnesium or 200 C. for copper, silver and gold.
- the extrusion of any metal at about its recrystallization temperature will give the interior con1- pacting of the powder particles to about 70% to of the density of the metal of the powder, and simultaneously the extrusion will develop the substantially continuous metallic surface layer. The result is a bendable rod of sufficient plasticity to be readily pressed and molded into desired shape.
- powders may be a mixture of different metals.
- the metal particles tend to accumulate and concentrate at the surface of the rod-like extruding mass developing a metallic surface skin by the welding together of the particles under the pressures applied and the resulting attrition between the material and the containing walls of the casing.
- a metal tube formation is thus generated '2 M4 holding the compacted material within it and rendering the putty convenient and easy to handle and apply as plastic strips readily bent and compressed into tight and closely fitting engagement with the crevices and openings to be sealed.
- the cross-sectional shape of the extruded strips may be of any desired configuration, circular, triangular, rectangular or more intricate designs adapted for most advantageous positioning and inter-fitting with the surfaces of the parts of the apparatus to which it is applied, or r of metal alloys.
- a soft metal powder such as lead may be mixed with particles of a harder metal, for instance tungsten, to serve as a binder for the latter to correspondingly reduce the temperature and pressure required for the compacting procedures, and the invention is not limparticles and with a relatively small proportion of a soft coating and binding material selected from the group consisting of oils and greases sufficient in amount to film the powder particles, said metal particles being compacted and agglomerated together and coalesced and joined into aggregates of various groupings with metal-tometal contacts between portions of the surfaces of the said particles and by thin intermediate films of said soft material so that the density of the composition is 70% to 95% of the density of the metal of the particles and there is a coalescence of the said metal-tometal contacted particles forming a pliant mass adapted to be pressure shaped into close fitting engagement with said cracks, crevices and the like and adapted to provide a continuous barrier seal against radiation blocked by the metal of said particles of said composition.
- a soft coating and binding material selected from the group consist
- a putty-like sealing composition as set forth in claim 1 in which the composition consists of a core of the compacted metal particles encased within a surface layer of further compacted particles forming a continuous metallie surface layer for the core.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Paints Or Removers (AREA)
- Lubricants (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US349565A US2833664A (en) | 1953-04-17 | 1953-04-17 | Sealing putty |
GB8560/54A GB760617A (en) | 1953-04-17 | 1954-03-24 | Plastic putty-like materials |
FR1104023D FR1104023A (fr) | 1953-04-17 | 1954-03-25 | Composition de poudre métallique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US349565A US2833664A (en) | 1953-04-17 | 1953-04-17 | Sealing putty |
Publications (1)
Publication Number | Publication Date |
---|---|
US2833664A true US2833664A (en) | 1958-05-06 |
Family
ID=32396512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US349565A Expired - Lifetime US2833664A (en) | 1953-04-17 | 1953-04-17 | Sealing putty |
Country Status (3)
Country | Link |
---|---|
US (1) | US2833664A (fr) |
FR (1) | FR1104023A (fr) |
GB (1) | GB760617A (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2916623A (en) * | 1958-05-02 | 1959-12-08 | Knapp Mills Inc | Method and means for detecting flaws in metals |
US3025177A (en) * | 1959-08-17 | 1962-03-13 | Minnesota Mining & Mfg | Sealant composition |
US3102024A (en) * | 1958-04-30 | 1963-08-27 | Knapp Mills Inc | Metallic powder composition |
US3412043A (en) * | 1966-08-05 | 1968-11-19 | Dexter Corp | Electrically conductive resinous compositions |
US4092192A (en) * | 1977-03-10 | 1978-05-30 | Douglas Magyari | High temperature caulking composition and method |
US4437013A (en) | 1981-07-06 | 1984-03-13 | The United States Of America As Represented By The Department Of Energy | Neutron and gamma radiation shielding material, structure, and process of making structure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010033762A1 (de) | 2010-08-09 | 2012-02-09 | Rolls-Royce Deutschland Ltd & Co Kg | Beschichtungsmittel zur Oberflächenglättung bei der Durchstrahlungsprüfung |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US137621A (en) * | 1873-04-08 | Improvement in the manufacture of iron and steel | ||
US1395413A (en) * | 1920-03-31 | 1921-11-01 | Goodrich Co B F | Art of mixing rubber with comminuted metal |
US1703634A (en) * | 1929-02-26 | Metall aktiengeselischaft | ||
US1889842A (en) * | 1930-12-08 | 1932-12-06 | Thomas C Parr | Composition of matter |
US2185194A (en) * | 1936-01-18 | 1940-01-02 | Clarence P Harris | Metallic powder aggregate |
US2263603A (en) * | 1936-06-17 | 1941-11-25 | Metals Disintegrating Co | Method of flaking lead |
US2280135A (en) * | 1940-02-21 | 1942-04-21 | Theodore W H Ward | Conductive coating for glass and method of application |
US2369502A (en) * | 1940-03-07 | 1945-02-13 | Raybestos Manhattan Inc | Friction material |
US2386544A (en) * | 1943-04-17 | 1945-10-09 | Henry L Crowley | Method of producing metallic bodies |
GB645030A (en) * | 1947-02-08 | 1950-10-25 | Davide Primavesi | Improvements in or relating to the reduction and sintering of moulded bodies containing reducible metal compounds |
US2570856A (en) * | 1947-03-25 | 1951-10-09 | Du Pont | Process for obtaining pigmented films |
US2618569A (en) * | 1949-10-08 | 1952-11-18 | Louton Kenneth | Calking compounds |
-
1953
- 1953-04-17 US US349565A patent/US2833664A/en not_active Expired - Lifetime
-
1954
- 1954-03-24 GB GB8560/54A patent/GB760617A/en not_active Expired
- 1954-03-25 FR FR1104023D patent/FR1104023A/fr not_active Expired
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US137621A (en) * | 1873-04-08 | Improvement in the manufacture of iron and steel | ||
US1703634A (en) * | 1929-02-26 | Metall aktiengeselischaft | ||
US1395413A (en) * | 1920-03-31 | 1921-11-01 | Goodrich Co B F | Art of mixing rubber with comminuted metal |
US1889842A (en) * | 1930-12-08 | 1932-12-06 | Thomas C Parr | Composition of matter |
US2185194A (en) * | 1936-01-18 | 1940-01-02 | Clarence P Harris | Metallic powder aggregate |
US2263603A (en) * | 1936-06-17 | 1941-11-25 | Metals Disintegrating Co | Method of flaking lead |
US2280135A (en) * | 1940-02-21 | 1942-04-21 | Theodore W H Ward | Conductive coating for glass and method of application |
US2369502A (en) * | 1940-03-07 | 1945-02-13 | Raybestos Manhattan Inc | Friction material |
US2386544A (en) * | 1943-04-17 | 1945-10-09 | Henry L Crowley | Method of producing metallic bodies |
GB645030A (en) * | 1947-02-08 | 1950-10-25 | Davide Primavesi | Improvements in or relating to the reduction and sintering of moulded bodies containing reducible metal compounds |
US2570856A (en) * | 1947-03-25 | 1951-10-09 | Du Pont | Process for obtaining pigmented films |
US2618569A (en) * | 1949-10-08 | 1952-11-18 | Louton Kenneth | Calking compounds |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3102024A (en) * | 1958-04-30 | 1963-08-27 | Knapp Mills Inc | Metallic powder composition |
US2916623A (en) * | 1958-05-02 | 1959-12-08 | Knapp Mills Inc | Method and means for detecting flaws in metals |
US3025177A (en) * | 1959-08-17 | 1962-03-13 | Minnesota Mining & Mfg | Sealant composition |
US3412043A (en) * | 1966-08-05 | 1968-11-19 | Dexter Corp | Electrically conductive resinous compositions |
US4092192A (en) * | 1977-03-10 | 1978-05-30 | Douglas Magyari | High temperature caulking composition and method |
US4437013A (en) | 1981-07-06 | 1984-03-13 | The United States Of America As Represented By The Department Of Energy | Neutron and gamma radiation shielding material, structure, and process of making structure |
Also Published As
Publication number | Publication date |
---|---|
GB760617A (en) | 1956-11-07 |
FR1104023A (fr) | 1955-11-15 |
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