Powder coating storage, construction environment, light loss phenomenon and treatment

February 1, 2023 Longchang Chemical

Powder coating storage, construction environment, light loss phenomenon and treatment

The storage of powders has a great impact on their quality. The storage of powder will generally be in a ventilated and dry, and the temperature of the storage space should not exceed 30 degrees.


Different varieties of powder can not be placed together to avoid mutual pollution. Different manufacturers of powder, in the construction, the powder must be recycled, that is to say, a batch used up and then the next batch, not used up the powder must be sealed box to avoid contamination.


Construction environment

Powder construction units have different requirements for environment, there are open air and closed, there are and production workshop through the body, there are various.


The correct powder construction environment should be independent, equipped with powder recovery equipment. Can not be placed in the spray room of the unused powder. Every day before and after work to spray the room with a dunnage or vacuum cleaner to clean the ground thoroughly. Spray room in the dust concentration should not be too large. First of all, it is not good for human health, and then the important point is that the powder in a certain space to reach a certain concentration will produce an explosion, which is very dangerous. Because the main components of the powder is chemical materials, flammable, the spray chamber must be prohibited fire.


Powder loss of light phenomenon and treatment

(1) powder in the oven more than the specified time and temperature is likely to surface loss of light. Epoxy polyester powder is generally constant temperature does not exceed 190 degrees. Pure polyester powder general constant temperature does not exceed 220 degrees.


Different materials require different thermal energy, so the time placed in the furnace is different. For example, aluminum type, thin iron plate, etc. in the furnace placement time is generally not more than 15-20 minutes. Large metal parts are generally placed in the furnace for 30-60 minutes.


(2) in the construction to reduce waste, the recycled powder added to the new powder mix, this situation will often cause the workpiece surface loss of light. The correct method is a powder (normal) add about 3 kg, generally should not exceed 5 kg, otherwise the loss of light.


(3) powder due to high temperature or over-extrusion to produce caking phenomenon. This situation will often make the powder light loss. This situation is generally taken to lump the powder with a sieve, and then combined with the unclumped powder, the problem is solved.


(4) different manufacturers of powder mixed with each other, because of mutual interference will also make the powder loss of light. If you need a different manufacturer’s powder must be electrostatic generator for the powder barrel, gun, powder tube and the surrounding environment clean, and then change to another powder.


(5) powder generally should not be stored for too long. Too much time will change the luster, the general luster of the higher powder, stored for too long, construction often some powder will also produce the phenomenon of light loss. Gloss low powder, such as black without light, gray without light, etc., stored for too long again is likely to have the phenomenon of ripple sand pattern.


(6) transparent powder on other powder interference, in the construction as long as you have used transparent powder, want to change the other powder must be clean and thorough gun, powder supply barrel, spray chamber clean up well.

Coating raw materials : UV Photoinitiator Same series products

Product name CAS NO. Chemical name
Sinocure® TPO 75980-60-8 Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide
Sinocure® TPO-L 84434-11-7 Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
Sinocure® 819/920 162881-26-7 Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide
Sinocure® 819 DW 162881-26-7 Irgacure 819 DW
Sinocure® ITX 5495-84-1 2-Isopropylthioxanthone
Sinocure® DETX 82799-44-8 2,4-Diethyl-9H-thioxanthen-9-one
Sinocure® BDK/651 24650-42-8 2,2-Dimethoxy-2-phenylacetophenone
Sinocure® 907 71868-10-5 2-Methyl-4′-(methylthio)-2-morpholinopropiophenone
Sinocure® 184 947-19-3 1-Hydroxycyclohexyl phenyl ketone
Sinocure® MBF 15206-55-0 Methyl benzoylformate
Sinocure® 150 163702-01-0 Benzene, (1-methylethenyl)-, homopolymer,ar-(2-hydroxy-2-methyl-1-oxopropyl) derivs
Sinocure® 160 71868-15-0 Difunctional alpha hydroxy ketone
Sinocure® 1173 7473-98-5 2-Hydroxy-2-methylpropiophenone
Sinocure® EMK 90-93-7 4,4′-Bis(diethylamino) benzophenone
Sinocure® PBZ 2128-93-0 4-Benzoylbiphenyl
Sinocure® OMBB/MBB 606-28-0 Methyl 2-benzoylbenzoate
Sinocure® BP 119-61-9 Benzophenone
Sinocure® 754 211510-16-6 Benzeneacetic acid, alpha-oxo-, Oxydi-2,1-ethanediyl ester
Sinocure® CBP 134-85-0 4-Chlorobenzophenone
Sinocure® MBP 134-84-9 4-Methylbenzophenone
Sinocure® EHA 21245-02-3 2-Ethylhexyl 4-dimethylaminobenzoate
Sinocure® DMB 2208-05-1 2-(Dimethylamino)ethyl benzoate
Sinocure® EDB 10287-53-3 Ethyl 4-dimethylaminobenzoate
Sinocure® 250 344562-80-7 (4-Methylphenyl) [4-(2-methylpropyl)phenyl] iodoniumhexafluorophosphate
Sinocure® 369 119313-12-1 2-Benzyl-2-(dimethylamino)-4′-morpholinobutyrophenone
Sinocure® 379 119344-86-4 1-Butanone, 2-(dimethylamino)-2-(4-methylphenyl)methyl-1-4-(4-morpholinyl)phenyl-
Sinocure® 938 61358-25-6 Bis(4-tert-butylphenyl)iodonium hexafluorophosphate
Sinocure® 6992 MX 75482-18-7 & 74227-35-3 Cationic Photoinitiator UVI-6992
Sinocure® 6992 68156-13-8 Diphenyl(4-phenylthio)phenylsufonium hexafluorophosphate
Sinocure® 6993-S 71449-78-0 & 89452-37-9 Mixed type triarylsulfonium hexafluoroantimonate salts
Sinocure® 6993-P 71449-78-0 4-Thiophenyl phenyl diphenyl sulfonium hexafluoroantimonate
Sinocure® 1206 Photoinitiator APi-1206


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