US1932699A - Process for applying alpha protective coating to metallic articles - Google Patents
Process for applying alpha protective coating to metallic articles Download PDFInfo
- Publication number
- US1932699A US1932699A US525875A US52587531A US1932699A US 1932699 A US1932699 A US 1932699A US 525875 A US525875 A US 525875A US 52587531 A US52587531 A US 52587531A US 1932699 A US1932699 A US 1932699A
- Authority
- US
- United States
- Prior art keywords
- protective coating
- applying
- metallic articles
- temperature
- metallic
- 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
- 238000000034 method Methods 0.000 title description 18
- 239000011253 protective coating Substances 0.000 title description 7
- 239000011347 resin Substances 0.000 description 17
- 229920005989 resin Polymers 0.000 description 17
- 239000002641 tar oil Substances 0.000 description 16
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 14
- 238000009835 boiling Methods 0.000 description 13
- 238000000576 coating method Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 239000011044 quartzite Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
Definitions
- the hardening of the dissolved resin after the application of the coating is effected by first raising, or maintaining, the temperature so as to cause the complete evaporation of the solvent, and then increasing the temperature so as to eifect the partial or complete hardening of the artificial resm.
- compositions prepared by dissolving induratable artificial resins in tar oil, with or without additions, are applied by brushing, spraying, or by dipping the heated article in the composition.
- Additional fillers may consist of organic substances of high boiling point, such as anthracene oils, since, owing to their high boiling pointabove 300 C.-they do not vaporize completely during the application process, but are still present in the hardened final coating, and act favorably by increasing its elasticity.
- tar oils Another advantage of employing tar oils consists in that the flash point is so high as to preclude risk in the performance of the process. Since the boiling points of tar oil range between about 180 and 360 C., whilst the hardening temperatures of the artificial resins lie between about 80 and 300 C., it is possible to select tar oils which boil within a range approximating to the temperature limits within which the hardening of the artificial resins proceeds with the requisite velocity. In this manner it is possibha not only to prevent the formation of bubbles, which is a source of considerable difiiculties in other methods of application, but also to avoid treatment at difierent temperatures, such as inevitable in the case of other solvents.
- the temperature of the tube may be approxi-v mately the same, during the application oi 'the artificial resin and tar oil compositions, as'that required for the hardening stage, provided merely that the optimum hardening temperature be borne in mind when selecting the tar oil to be employed, or conversely that, in the case of tar oils with a given range of boiling points, the hardening temperatures of the resins employed approximately coincide with said range of boiling points.
- a process for applying a protective coating to metallic articles which comprises applying a composition containing a solution of induratable artificial resins in tar oil and an organic substance such as anthracene boiling above 300 C., to a metallic article whilst heating.
- a process for applying a protective coating to metallic articles which comprises heating the metallic article and then applying a composition containing a solution of induratable artificial resins in tar oil and an organic substance such as anthracene boiling above 300 C. to said metallic article.
- a process for applying a protective coating to metallic articles which comprises applying a composition containing a solution of induratable artificial resins in tar oils having a range o1 boiling points approximately corresponding to the temperature at which the transformation of the artificial resin into the insoluble and infusible form proceeds at suitable velocity and an organic substance such as anthracene boiling above 300 C., to a metallic article whilst heating.
- a process for applying a protective coating to metallic articles which comprises heating the metallic article and then applying a composition containing a solution of induratable artificial resins in tar oils having a range of boiling points approximately corresponding to the temperature at which the transformation of the artificial resin inio the insoluble and infusible form proceeds at suitable velocity and an organic substance such as anthracene boiling above 300 C. to said metallic article.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Patented Oct. 31, 1933 PROCESS FOR APPLYING A PROTECTIVE COATING '10 METALLIC ARTICLES Heinrich Klas, Dusseldorf, Germany, assignor to the firm Vereinigte Stahlwerke Aktiengesellschaft, Dusseldorf, Germany No Drawing. Application March 27, 1931, Serial No. 525,875, and in Germany May 3, 1930 4 Claims. (CI. 91-70) This invention relates to a process for applying a protective coating to metallic articles.
It is known to dissolve induratable artificial resins in solvents and apply them to articles of 5 various kinds by brushing, spraying or dipping,
and that a suitable filler, such as aluminium powder, finely pulverized heavy spar or the like, may also be incorporated with the solution. The hardening of the dissolved resin after the application of the coating, is effected by first raising, or maintaining, the temperature so as to cause the complete evaporation of the solvent, and then increasing the temperature so as to eifect the partial or complete hardening of the artificial resm. I
This current process is attended with considerable difiiculties, due, in part, to the nature of the solvent itself, and partly to the method of producing such an induratable coating. The evaporation of the solvent (usually alcohol) requires a certain time, and it is not until evaporation is complete that an elevated hardening temperature can be employed. Consequently, the complete application process takes some considerable time. A further difficulty consists in that, in the first place, a temperature suitable for evaporating the solution must be maintained for a certain period, of at least half an hour, after which the still higher optimum hardening temperature must be maintained for a certain minimum period. This process is cumbrous and requires extensive appliances and control apparatus, together with first-class skilled operatives. A further difliculty resides in the infiammability of the usual solvents, which must only be used withspecial precautions which increase the expense of the operation. Extensive experiments with a view to improving the various artificialresin coatings and simplifying the process of applying same, have also shown that, when ap plied by the.known process, the elasticity of the artificial resins, under mechanical stresses, such as shock and impact, leaves much to be desired.
It has now beenascertained that the process of applying a coating of induratable artificial resin to metallic articles is substantially lmproved by dissolving induratable artificial resins in tar oil, with or without finely powdered fillers. The employment of tar oil possesses the particular advantage-in addition to those hereinafter set forththat its viscosity renders it highly suitable as a suspension vehicle.
Since it is of advantage to employ inorganic fillers which resist chemical action, on the one hand, and possess sufiicient physical hardness on the other-such as heavy spar, quartzite or other minerals-suspensions should always be employed when such fillers are used, since the latter are insoluble in the tar oil. The compositions prepared by dissolving induratable artificial resins in tar oil, with or without additions, are applied by brushing, spraying, or by dipping the heated article in the composition.
Additional fillers may consist of organic substances of high boiling point, such as anthracene oils, since, owing to their high boiling pointabove 300 C.-they do not vaporize completely during the application process, but are still present in the hardened final coating, and act favorably by increasing its elasticity.
Another advantage of employing tar oils consists in that the flash point is so high as to preclude risk in the performance of the process. Since the boiling points of tar oil range between about 180 and 360 C., whilst the hardening temperatures of the artificial resins lie between about 80 and 300 C., it is possible to select tar oils which boil within a range approximating to the temperature limits within which the hardening of the artificial resins proceeds with the requisite velocity. In this manner it is possibha not only to prevent the formation of bubbles, which is a source of considerable difiiculties in other methods of application, but also to avoid treatment at difierent temperatures, such as inevitable in the case of other solvents. In the case of these latter, it is first necessary to employ a low temperature in order to evaporate the solvent, and only thereafter to proceed to the higher, actual hardening temperature. Operating in this manner necessitates either employing two stoves, together with the devices for transferring the articles from the one to the other, or else the gradual heating of the coated articles up to the hardening temperature. The consumption of material, heat and time thereby entailed is obviated by the hereindescribed process. In this case, the temperature of the tube may be approxi-v mately the same, during the application oi 'the artificial resin and tar oil compositions, as'that required for the hardening stage, provided merely that the optimum hardening temperature be borne in mind when selecting the tar oil to be employed, or conversely that, in the case of tar oils with a given range of boiling points, the hardening temperatures of the resins employed approximately coincide with said range of boiling points.
The previously mentioned beneficial action of a content 01' organic substances of high boiling point, such as anthracene oil (b. p. above 300 C.) in the finished, hardened coating, can be easily obtained in accordance with the invention, by adding a certain amount of anthracene oil, boiling above 300 C., to the tar oil employed as the solvent. The coatings obtained in accordance with the above described principles are distinguished by extreme compactness and adhesion, and thus are unusually resistant to chemical and mechanical influences.
Example A tube of any convenient metal or metallic alloy, which has either been previously heated in a'suitable and known manner, or is heated to about 260-280 C. during the operation, is brushed or, preferably, sprayed with a mixture prepared, in known manner, bytriturating tar oil (b. p. 210-240 C.) with a mixture of finely powdered artificial resin and finely powdered quartzite in equal proportions. If necessary, a short supplementary hardening of the coating may be performed at a suitable temperature. The coating may be applied both outside and inside.
I claim:-
1. A process for applying a protective coating to metallic articles, which comprises applying a composition containing a solution of induratable artificial resins in tar oil and an organic substance such as anthracene boiling above 300 C., to a metallic article whilst heating.
2. A process for applying a protective coating to metallic articles, which comprises heating the metallic article and then applying a composition containing a solution of induratable artificial resins in tar oil and an organic substance such as anthracene boiling above 300 C. to said metallic article.
3. A process for applying a protective coating to metallic articles, which comprises applying a composition containing a solution of induratable artificial resins in tar oils having a range o1 boiling points approximately corresponding to the temperature at which the transformation of the artificial resin into the insoluble and infusible form proceeds at suitable velocity and an organic substance such as anthracene boiling above 300 C., to a metallic article whilst heating.
4. A process for applying a protective coating to metallic articles, which comprises heating the metallic article and then applying a composition containing a solution of induratable artificial resins in tar oils having a range of boiling points approximately corresponding to the temperature at which the transformation of the artificial resin inio the insoluble and infusible form proceeds at suitable velocity and an organic substance such as anthracene boiling above 300 C. to said metallic article.
HEINRICH KLAS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE595456T | 1930-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1932699A true US1932699A (en) | 1933-10-31 |
Family
ID=6318088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US525875A Expired - Lifetime US1932699A (en) | 1930-05-03 | 1931-03-27 | Process for applying alpha protective coating to metallic articles |
Country Status (4)
Country | Link |
---|---|
US (1) | US1932699A (en) |
DE (1) | DE595456C (en) |
GB (1) | GB368538A (en) |
NL (1) | NL28689C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2856541A (en) * | 1952-02-06 | 1958-10-14 | Gen Electric | Semiconducting device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1119730B (en) * | 1956-03-09 | 1961-12-14 | Mannesmann Ag | Process for producing an anti-corrosion coating with vinyl polymers as a binder |
-
0
- NL NL28689D patent/NL28689C/xx active
-
1930
- 1930-05-03 DE DE1930595456D patent/DE595456C/en not_active Expired
-
1931
- 1931-03-24 GB GB9053/31A patent/GB368538A/en not_active Expired
- 1931-03-27 US US525875A patent/US1932699A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2856541A (en) * | 1952-02-06 | 1958-10-14 | Gen Electric | Semiconducting device |
Also Published As
Publication number | Publication date |
---|---|
GB368538A (en) | 1932-03-10 |
DE595456C (en) | 1934-04-20 |
NL28689C (en) |
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