US3737401A - Method of making powder paint - Google Patents
Method of making powder paint Download PDFInfo
- Publication number
- US3737401A US3737401A US00186695A US3737401DA US3737401A US 3737401 A US3737401 A US 3737401A US 00186695 A US00186695 A US 00186695A US 3737401D A US3737401D A US 3737401DA US 3737401 A US3737401 A US 3737401A
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- Prior art keywords
- paint
- liquid
- powder
- solvent
- particles
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/80—Processes for incorporating ingredients
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S524/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S524/904—Powder coating compositions
Definitions
- FIG-3 June 5, 1973 H. Tsou ETAL METHOD OF MAKING POWDER PAINT 3 Sheets-Sheet 5 Filed Oct. 5. 1971 F' l G. 4
- a method of making powder paint wherein there is blended with a coagulating liquid, at a rate inversely proportional to the desired particle size of the powder paint, a liquid paint having its solvent portion miscible with the coagulating liquid and its film-forming portion insoluble in the coagulating liquid, to precipitate the paint in powder form, and removing thus precipitated powder paint from the blend.
- powder coatings are manufactured by processes involving mechanical attrition, i.e. grinding of chunks of solid paint or solid components of paint.
- mechanical attrition i.e. grinding of chunks of solid paint or solid components of paint.
- the equipment used for the grinding involves the capital investment of large sums; and the obsolescence of current paint manufacturing equipment by some processes adds appreciably to the cost of powdered paints.
- mechanical attrition does not permit close control over the size and distribution range of sizes of the powdered paint particles.
- mechanical grinding does not produce smooth, rounded paint particles but rather particles having sharp edges and odd shapes. These oddly shaped particles reduce efficiency when used in electrostatic spraying operations by necessitating higher voltages with a greater danger of electrical arcing.
- the properties of the finished coating often depend heavily upon the physical properties of the powder-such as size and shape of the particles, homogeneity of composition, and uniformity of sizes.
- the present invention eliminates all of these difculties.
- the first is solved by using standard paint manufacturing equipment to make a conventional paint in which only the solvent may be altered from conventional formulas. Although some additional equipment is needed, the techniques used here require only a minimum addition of machinery.
- the second diiiiculty of conventional powder making techniques is overcome by the present process because reasonably exact control can be exercised over the size of the particles.
- the final difficulty is overcome because the nature of the hereinafter described process produces substantially uniformly shaped particles.
- the present process involves lirst the manufacture of conventional liquid paint, and then the controlled coagulation or precipitation of the non-solvent portion (i.e., film-forming portion) of the paint in powder form.
- the solvent portion of the paint is selected to be miscible with a coagulating liquid which is not a solvent for the nonsolvent portion of the paint.
- the rate at which the liquid paint and coagulating liquid are mixed, and the completeness of the blending of the two liquids are of great importance.
- the size of the particles produced is inversely related to the rate at which the paint solvent is diluted and the range of the particle sizes is directly related to the completeness of the blending, viz., the slower the paint solvent is diluted from just prior to coagulation or the onset of precipitation until the major portion of the non-solvent portion has precipitated, the larger are the powder paint particles produced, and the less complete is the blending of the coagulating liquid and the liquid paint the greater the particles size range of the powder produced.
- One object of this invention is to produce paint powders from a broad range of conventional liquid paints, and to produce these paints powders having these desirable physical characteristics of size, shape and homogeneity of composition.
- Another object is to manufacture powder paints while using standard and currently available liquid paint manufacturiug facilities with only a modest addition or alteration of the equipment for utilization in the powder making process.
- a further object of this invention is to apply this method to any system where a homogeneous powder having particles with desired size and distribution of sizes is required for desired application of the powder.
- FIG. l is a schematic tiow diagram of the process including many optional steps
- FIGS. 2 and 3 represent typical paint systems utilizing liquids A and B to determine the percentage of solvent added
- FIG. 4 represents the particle size distribution for p owders made at points indicated in FIG. 2.
- the powder may be either dried to result in a dry powder or it may be allowed to remain wet with a liquid which is not a solvent for the paint system. This latter form is preferred in applications where the paint is applied as a slurry since then no drying procedure is required in manufacture of the paint powder.
- paint here will also include powdered coating materials as well as more conventional paints.
- the rst essential step of the process is to manufacture a conventional paint using one of a select group of solvents as the liquid vehicle as described below.
- the property that the solvents share that make them acceptable for making powdered paint is that they are good solvents for the paint system and the precipitating or coagulating liquid.
- the second essential step of the process is to suddenly and uniformly dilute the paint in a liquid medium which is miscible with the paint solvent and is not a solvent for the remainder of the paint system-the pigments and film formers.
- the dilution can be done in a number of ways as hereinafter described, depending upon the physical properties desired of the powder and the economics of the production process.
- the remaining steps are optional, such as washing and processing the precipitated powder paint by any of numerous well known methods.
- the film formers and pigments are prepared as usual in the normal manufacture of paint.
- the solvent portion o-f the liquid paint is here called liquid A.
- Film formers are used here to indicate all of the elements of the paint that are soluble in liquid A.
- pigments indicate all of the components that are not soluble in liquid A.
- the pigments must be finely enough pulverized to remain in homogeneous suspension throughout liquid A.
- an optional step which, although it is not necessary to the practice of the invention, does yalter the characteristics of the resulting powder, is to gradually and uniformly mix liquid B with the liquid paint until a desired concentration of liquid B is present. If it is wished to make the powder particles as small as possible, it is helpful to increase the concentration of liquid B to just short of that necessary to effect coagulation as shown by the dotted line 8 in FIG. 2. However, in no case can the uniformly mixed concentration of liquid B be beyond the line of coagulation 4 in FIG. 2, or else premature coagulation will occur.
- the paint is then suddenly diluted and blended with liquid B. This step is important to the control of the powder particle characteristics. Once the preliminary condition of the paint and its solvent has been met, the method and the rate at which dilution and coagulation is performed will govern particle size and distribution of sizes.
- One method is to agitate the liquid paint in a container and then to rapidly pour in a large amount of coagulating liquid until coagulation of the non-solvent (i.e., film forming) portion of the paint is completed.
- This method yields a broad range of particle sizes and is suited for batch processing. However, it is difficult to control the sizes of powder particles resulting from this method.
- Another method is to agitate a container of the coagulating second liquid and slowly pour the prepared paint into the agitated second liquid.
- the pigments and film formers of the paint i.e., the lilm forming portion of the liquid paint
- the solvent becomes iniinitely thin in the volume of second liquid in which the solvent is miscible while the pigments and ilm formers are not soluble.
- a third method, and the preferred embodiment, is Well suited to continuous production and permits a closer control over both particle size and distribution of sizes than the other two methods.
- a container of liquid B with a supply of liquid B being fed into the container below the paint inlet, is vigorously agitatedby a rotary blade high-speed mixer.
- An outlet nozzle for the paint mixture is fixed beneath the surface of liquid B near the mixer blade where the agitation of liquid B is at a maximum.
- the paint mixture is then injected under high pressure through the nozzle into the agitated liquid B.
- Such injection produces a nearly instantaneous breakup of the stream of paint into small droplets.
- the solvent in these droplets since it is miscible with liquid B, then leaves the droplet causing the droplet to coalesce into a minute particle of the non-solvent portions of the paint (since they are not soluble in liquid B) which becomes the powder.
- the coagulated particles will oat on the surface as a foam or froth. Since fresh liquid B is being fed into the tank, the overflow at the top carries olf the foamed powder as it is produced from the paint. Since the fresh liquid B is fed into the tank below the paint nozzle, the mixture of liquid B and the paint solvent (liquid A) also flows out the overflow thus preventing the liquid in the container from becoming saturated with solvent.
- the powder particles are removed from the liquid mixture by ltration or any other method of separating solid from liquid.
- the mixture of liquids A and B or the liquid that has been used to Wash the powder can then be recycled in a closed system.
- the heat advantage of this process is that little or no solvent is lost to the atmosphere thereby avoiding air pollution. Consequently, there is no limitation on the choice of solvents other than the limitations imposed by the properties of the powder paint it is desired to produce. This enables economic use of solvents which would be unacceptable for use in liquid paints.
- the powder may be screened to eliminate any undesirable sizes of particles. For example, it may be desired to have only particles less than 40 microns in diameter for wet spraying application. Electrostatic spraying is more eflicient when there are neither very large nor very small particles of paint in the powder, thus it may be desirable to screen out particles below 20 microns and above 80 microns in size. This wet screening can be done using any conventional method. An advantage to wet screening is that no ne paint particles enter the atmosphere as dust.
- the particles that have been screened out, and are not desired for some other application, can be recycled into the original paint by redissolving them in liquid A, which they will easily do because no irreversible change has occurred in this manufacturing process.
- the powder may be stored and packaged without drying since the powder is already wet and its nal application is wet.
- the powder is to be applied in dry form such as with electrostatic spraying or fluidized bed applications
- the powder can be dried by any conventional technique such as air drying or spray drying.
- FIGS. 2 and 3 represent typical graphs We have prepared and have found helpful in determining the mixture of the paint or composition necessary to achieve a predetermined distribution of particle sizes.
- the first axis x shows the weight percentage of the non-solvent portions f the paint or material (i.e., lm forming portion of the liquid paint), this includes both portions soluble and insoluble in the solvent or liquid A.
- the soluble portions include usually plasticizers, resins, and other organic compounds; the insoluble portion includes pigments. It is not essential that there be an insoluble portion to the paint, but, if there are, then they may act as nucleation agents ,l for the soluble portion during coagulation, thus promoting homogeneity of the composition.
- the second axis y shows the weight percentage of the solvent, which for convenient reference we have designated as liquid A. While a single solvent is normally used for simplicity, it is to be understood that with some material systems a mixture of more than one solvent may be desirable to manufacture a powder having a certain distribution of sizes.
- the third axis z represents the coagulating liquid, which is called liquid B. Again liquid B may be cornposed of a single liquid or a combination of liquids. While liquid A must be a solvent for at least a portion of the paint solids, liquid B cannot be a solvent, or at least must be a very poor solvent, for any of the paint solids. Further, liquids A and B must be miscible and the more readily they mix with each other the easier it becomes to control the particle size of the coagulated powder.
- the line 4 represents the point for each mixture of a liquid paint having a specified percentage of paint solids, liquid A (or solvent), and coagulating liquid B at which coagulation begins to occur.
- Line 6 represents the point at which the major portion, such as 95%, of the paint solids have coagulated with the slow addition of further liquid B.
- line represents the onset of coagulation and line 7 represents the near completion, i.e., 95% of coagulation for another paint system.
- FIG. 4 For example, using the system depicted in FIG. 2, samples were manufactured having solvent content as shown at points 10, 20, 30, 40 and 50 using the same mechanical system.
- the powders that were coagulated were analyzed and the resulting particle size distributions are shown in FIG. 4 where 10 corresponds to the powder made at point 10 in FIG. 2, and so forth.
- the logarithmic horizontal scale, n (Mu), in FIG. 4 indicates the diameter of the particles of powder in microns while the linear vertical scale shows the volume of powder in percent having diameters greater than the indicated micron size. It is apparent that if particles having sizes below 30 microns are desired, point 50 should be used with this system.
- FIG. 2 or 3 and the analysis performed of the resulting sizes as in FIG. 4 it is possible to determine the optimum amount of liquid A to be used in coagulating the paint.
- the size of the coagulated powder can be controlled to a large extent by the mechanical system employed.
- the essential characteristic of the mechanical system is the rapidity with which the liquid paint is completely blended with liquid B. This in turn is believed dependent to some extent upon the size of the liquid paint droplets, as the smaller droplets would appear to more quickly and completely blend than larger droplets. Further, the size of the droplets would appear to be related to the final particle size. Therefore, the faster the blending and the smaller the size of the paint droplets, the smaller will be the resulting paint particles.
- the smaller the size of the nozzle for a given pressure and agitation the smaller will be the average size of the powder produced.
- the higher the pressure the smaller will be the average size of the powder particles although this effect is not as pronounced as the effect of the nozzle size.
- Agitation also has some eiect upon the particle size, but this is not of great irnportance provided the agitation is suiciently vigorous. It will thus be noted that a powder made from a system using higher pressure and smaller nozzles for injection of the paint into liquid B will have the same sizes as a powder made from a paint having proportionately more liquid A to non-solvent portions of the paint with a lower pressure and larger nozzle arrangement.
- DOP di-octyl phthalate
- the manufacturer of a liquid paint to be used in the process is indicated at Paint Manufacturer and includes the conventional steps for the manufacture of liquid paint, modified only in the selection of a solvent portion, liquid A, which will be miscible with liquid B.
- the thus formed liquid paint may then be directly added to the liquid B in the coagulating chamber as indicated by the phantom flow arrow 100, to which liquid B is supplied as indicated at 102, or there may be a premixing of the liquid paint and liquid B short of coagulation, and then the mixture shocked by adding it to a large quantity of liquid B as indicated by flow arrow.
- liquid A may conveniently be acetone for a variety of liquid paint compositions and liquid B may be water.
- the wet powder may be collected and passed to a filtration stage where, by conventional means, the wet powder is separated from the blend of liquids, and the blend of liquids A and B then separated from each other for reuse. Such separation may be effected bydistillation or other convenient technique.
- the filtered powder may be washed with either more liquid B or another liquid not a solvent for the powder, and then the powder screened for size. IUndesired particles may be returned to the original liquid paint man ufacturing stage for recycling. Following screening, the desired particles may be either wet packaged, or dried and then packaged.
- a conventional liquid paint was made by grinding 25 grams of carbon pigment, 50 grams of Rohm & Haas Acryloid A-101 acrylic ester resin, and 125 grams of acetone in a steel ball mill for 40 hours until a pigment dispersion with a iineness of 7 measured by the Hegman grind gage was produced. This was then added along with 1000 grams of acetone to the coagulated resin produced by mixing 1500 grams of Rohm & Haas Acryloid B-66 acrylic ester resin with 4500 grams of VM&P naphtha. After mixing in a food blender for one hour the paint became homogeneous. While still agitating the liquid paint, water was added as the coagulating liquid, at 500 gram increments until coagulation just began to occur. At this point we immediately added 2000 more grams of Water to effect precipitation of the powder. The powder was then collected and separated from the liquid blend, filtered, washed, and dried.
- EXAMPLE II Fifty grams of the same liquid paint as described in Example I was poured by hand into 300 grams of water while agitating the water by a high speed mixer, such as the Waring Blender Model 1120. The coagulated paint was then filtered and desiccated in air for 16 hours. The
- EXAMPLE III A liquid paint was made by grinding 300 grams of titanium dioxide with 50 grams of lampblack, 25 grams of talc, 250 grams of Vinsalyn 130 thermoplastic resin and 600 grams of acetone in a steel ball for 16 hours until a pigment dispersion of 7 on the Hegman grind gage was produced. To this dispersion was then added another 600 grams of Hercules Vinsalyn 130 thermoplastic resin and 400 grams of acetone and such was mixed until homogeneous. The liquid paint was then pumped under a pressure of 100 p.s.i.
- thermoplastic acrylic polymer resin 70% by weight was dissolved in 30% by weight of Union Carbides Ethyl Cellosolve. No pigment was added to this resin. Acetone was then added to portions of this solution as indicated in Table I below. These mixtures are indicated by the appropriate reference in the table to FIG. 2.
- EXAMPLE X The same as Example 1X except that the coagulant (liquid B) was isopropyl alcohol.
- Liquid A Liquid B Use Xylene Hexane or other Alkyd, polyesters, styrene and Toluene. paratinic vinyl toluene modified poly- K1eto ⁇ r11e1. hydrocarbon. esters.
- Alcohol.. such as hydrochloric especially anionic latexes.
- film forming portion of a liquid paint will include the film formers, and the pigments, if any, when used in the following claims.
- the invention defined by claim 1 characterized by separating the solvent portion and the coagulating liquid following precipitation of the powder paint, and reusing the solvent portion as aforesaid in subsequent making of liquid paint.
- the invention defined by claim 7 characterized by mixing selected sizes of the powder following screening and while in the wet state into a slurry for coating application.
- the invention defined by claim 1 characterized by washing the paint particles, screening the wet paint particles for size, and drying the selected size paint particles to provide a dry powder paint.
- the invention defined in claim 12 characterized by controlling the quantity of the coagulating liquid to regulate agglomeration of the precipitated powder paint particles.
- the invention defined in claim 13 characterized by diluting the droplets with a sufficient quantity of the coagulating liquid to precipitate the film forming portion of the individual droplets as discrete substantially nonagglomerating powder paint particles.
- the invention defined in claim 1 characterized by controlling the quantity of the coagulating liquid to regulate agglomeration of the precipitated powder paint particles.
- the invention defined in claim 1 characterized by diluting the droplets With a sufficient quantity of the coagulating liquid to precipitate the -film forming portion of the individual droplets as discrete substantially nonagglomerating powder paint particles.
- the invention defined by claim 1 characterized in that the step of dividing the liquid paint is carried out by subjecting the liquid paint to a rapidly moving mixer blade immersed in the coagulating liquid and diffusing the droplets through such liquid.
- the invention defined by claim 1 characterized by separating from the powder paint particles those of undesired size and resolving them in a sol-vent which is miscible with the coagulating liquid and repeating the method described with respect thereto to make powder paint therefrom of desired particle size.
- the invention defined by claim 1 characterized by wet screening the powder paint particles to remove par ticles of undesired size, resolving the particles of undesired size in a solvent which is miscible with the coagulating liquid, and repeating the method described to make powder paint therefrom.
- the invention as defined in claim 1 characterized by agitating the liquid paint and during such agitation adding thereto a coagulating liquid which is miscible with the solvent portion but is not a solvent for the film forming portion, at a rate and in an amount to precipitate the film forming portion as powder paint particles, and separating the powder paint particles from the mixture of coagulating liquid and solvent portion.
- the invention as defined in claim 1 characterized by agitating the coagulating liquid which is miscible with the solvent portion but is not a solvent for the film forming portion, and during such agitation slowly adding the liquid paint thereto to precipitate the film forming portion as powder paint particles, and separating the powder paint particles from the mixture of coagulating liquid and solvent portion.
- the invention as defined in claim 1 characterized by vigorously agitating the coagulating liquid, which is miscible with the solvent portion but is not a solvent for the film forming portion, by the rotary blade of a high speed mixer immersed in the coagulating liquid, injecting the liquid paint into the coagulating liquid near the blade to cause precipitation of the film forming portion as powder paint particles, and separating the powder paint particles from the mixture of coagulating liquid and solvent portion.
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- Processes Of Treating Macromolecular Substances (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18669571A | 1971-10-05 | 1971-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3737401A true US3737401A (en) | 1973-06-05 |
Family
ID=22685943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00186695A Expired - Lifetime US3737401A (en) | 1971-10-05 | 1971-10-05 | Method of making powder paint |
Country Status (17)
Country | Link |
---|---|
US (1) | US3737401A (it) |
JP (1) | JPS4852851A (it) |
AR (1) | AR193540A1 (it) |
AU (1) | AU474188B2 (it) |
BE (1) | BE788826A (it) |
BR (1) | BR7206756D0 (it) |
CA (1) | CA979605A (it) |
DE (1) | DE2247695B2 (it) |
ES (1) | ES406232A1 (it) |
FI (1) | FI59608C (it) |
FR (1) | FR2156587B1 (it) |
GB (1) | GB1400861A (it) |
IT (1) | IT965286B (it) |
NL (1) | NL7213381A (it) |
PH (1) | PH9874A (it) |
SE (1) | SE390973B (it) |
ZA (1) | ZA725705B (it) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879335A (en) * | 1971-08-14 | 1975-04-22 | Basf Ag | Production of pigmented resin powders |
US3888945A (en) * | 1971-07-22 | 1975-06-10 | Roehm Gmbh | Method for preparing polymers in solid particulate form |
US3925298A (en) * | 1973-04-25 | 1975-12-09 | Grow Chemical Corp | Method of making dry pigmented powder paint |
US4028326A (en) * | 1975-09-25 | 1977-06-07 | Ford Motor Company | Process for producing powder paint particles from liquid paint I |
US4028327A (en) * | 1975-09-25 | 1977-06-07 | Ford Motor Company | Process for producing powder paint particles from liquid paint II |
US4057607A (en) * | 1975-12-19 | 1977-11-08 | Celanese Corporation | Process for preparing shear degradable particle-containing resin powders |
JPS5313639A (en) * | 1976-07-05 | 1978-02-07 | Dainippon Toryo Co Ltd | Preparation of slurry coating compositions |
JPS5322532A (en) * | 1976-08-13 | 1978-03-02 | Dainippon Toryo Co Ltd | Preparation of thermosetting slurry coating compounds |
US4093571A (en) * | 1976-01-14 | 1978-06-06 | Celanese Corporation | Process for making porous metal containing powder coating compositions |
US4110529A (en) * | 1974-11-26 | 1978-08-29 | Ceschoslovak Akademie Ved | Method of manufacturing spherical polymer particles from polymer solutions |
US4112214A (en) * | 1975-03-12 | 1978-09-05 | Grow Chemical Corp. | Method of preparing powder particles by control of the particle shape |
US4201834A (en) * | 1977-10-25 | 1980-05-06 | Celanese Corporation | Powder composition and method of preparation |
US4206161A (en) * | 1976-10-18 | 1980-06-03 | Dai Nippon Toryo Co., Ltd. | Method of producing resin powder |
US4365043A (en) * | 1976-03-12 | 1982-12-21 | Nippon Paint Co., Ltd. | Resinous particles for coating composition and its production |
US6291579B1 (en) | 1996-12-18 | 2001-09-18 | Basf Coatings Ag | Aqueous powder-paint dispersion |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52107033A (en) * | 1976-03-05 | 1977-09-08 | Nippon Paint Co Ltd | Method of manufacturing slurry-type water dispersed paint |
JPS52110731A (en) * | 1976-03-15 | 1977-09-17 | Dainippon Toryo Co Ltd | Method of manufacturing water dispersed coating composition |
-
0
- BE BE788826D patent/BE788826A/xx unknown
-
1971
- 1971-10-05 US US00186695A patent/US3737401A/en not_active Expired - Lifetime
-
1972
- 1972-06-21 AU AU43732/72A patent/AU474188B2/en not_active Expired
- 1972-06-23 PH PH13675A patent/PH9874A/en unknown
- 1972-08-18 ZA ZA725705A patent/ZA725705B/xx unknown
- 1972-08-21 GB GB3891672A patent/GB1400861A/en not_active Expired
- 1972-08-25 CA CA150,191A patent/CA979605A/en not_active Expired
- 1972-08-29 SE SE7211135A patent/SE390973B/xx unknown
- 1972-08-30 FI FI2395/72A patent/FI59608C/fi active
- 1972-08-31 ES ES406232A patent/ES406232A1/es not_active Expired
- 1972-09-02 AR AR243961A patent/AR193540A1/es active
- 1972-09-09 IT IT52650/72A patent/IT965286B/it active
- 1972-09-12 FR FR7232276A patent/FR2156587B1/fr not_active Expired
- 1972-09-28 BR BR006756/72A patent/BR7206756D0/pt unknown
- 1972-09-28 DE DE2247695A patent/DE2247695B2/de not_active Withdrawn
- 1972-10-03 NL NL7213381A patent/NL7213381A/xx not_active Application Discontinuation
- 1972-10-05 JP JP47099472A patent/JPS4852851A/ja active Pending
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3888945A (en) * | 1971-07-22 | 1975-06-10 | Roehm Gmbh | Method for preparing polymers in solid particulate form |
US3879335A (en) * | 1971-08-14 | 1975-04-22 | Basf Ag | Production of pigmented resin powders |
US3925298A (en) * | 1973-04-25 | 1975-12-09 | Grow Chemical Corp | Method of making dry pigmented powder paint |
US4110529A (en) * | 1974-11-26 | 1978-08-29 | Ceschoslovak Akademie Ved | Method of manufacturing spherical polymer particles from polymer solutions |
US4112214A (en) * | 1975-03-12 | 1978-09-05 | Grow Chemical Corp. | Method of preparing powder particles by control of the particle shape |
US4028326A (en) * | 1975-09-25 | 1977-06-07 | Ford Motor Company | Process for producing powder paint particles from liquid paint I |
US4028327A (en) * | 1975-09-25 | 1977-06-07 | Ford Motor Company | Process for producing powder paint particles from liquid paint II |
US4057607A (en) * | 1975-12-19 | 1977-11-08 | Celanese Corporation | Process for preparing shear degradable particle-containing resin powders |
US4093571A (en) * | 1976-01-14 | 1978-06-06 | Celanese Corporation | Process for making porous metal containing powder coating compositions |
US4365043A (en) * | 1976-03-12 | 1982-12-21 | Nippon Paint Co., Ltd. | Resinous particles for coating composition and its production |
JPS5313639A (en) * | 1976-07-05 | 1978-02-07 | Dainippon Toryo Co Ltd | Preparation of slurry coating compositions |
JPS5426250B2 (it) * | 1976-07-05 | 1979-09-03 | ||
JPS5322532A (en) * | 1976-08-13 | 1978-03-02 | Dainippon Toryo Co Ltd | Preparation of thermosetting slurry coating compounds |
JPS5426251B2 (it) * | 1976-08-13 | 1979-09-03 | ||
US4206161A (en) * | 1976-10-18 | 1980-06-03 | Dai Nippon Toryo Co., Ltd. | Method of producing resin powder |
US4201834A (en) * | 1977-10-25 | 1980-05-06 | Celanese Corporation | Powder composition and method of preparation |
US4260066A (en) * | 1977-10-25 | 1981-04-07 | Celanese Corporation | Method of powder coating a glass container and product produced |
US6291579B1 (en) | 1996-12-18 | 2001-09-18 | Basf Coatings Ag | Aqueous powder-paint dispersion |
Also Published As
Publication number | Publication date |
---|---|
JPS4852851A (it) | 1973-07-25 |
ZA725705B (en) | 1973-05-30 |
ES406232A1 (es) | 1975-08-16 |
FR2156587B1 (it) | 1976-10-29 |
BR7206756D0 (pt) | 1973-08-30 |
IT965286B (it) | 1974-01-31 |
AU4373272A (en) | 1974-01-03 |
FR2156587A1 (it) | 1973-06-01 |
GB1400861A (en) | 1975-07-16 |
AR193540A1 (es) | 1973-04-30 |
FI59608B (fi) | 1981-05-29 |
DE2247695B2 (de) | 1981-02-26 |
CA979605A (en) | 1975-12-16 |
FI59608C (fi) | 1981-09-10 |
BE788826A (fr) | 1973-01-02 |
NL7213381A (it) | 1973-04-09 |
PH9874A (en) | 1976-05-12 |
DE2247695A1 (de) | 1973-04-19 |
SE390973B (sv) | 1977-01-31 |
AU474188B2 (en) | 1976-07-15 |
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