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Copper gold powder related information

发表时间:2016-1-14 14:39:08  浏览次数:851


A, copper and gold powder resin and solvent (oil system) 1 should avoid the use of nitro cellulose and epoxy resin. Because the two will react with copper and generate jelly; if must use the two resins, as far as possible in a short period of time using.
2 should be used as far as possible low acid value (less than 3) of the resin, the resin acid system as low as possible.
Help make gold powder particle hole entirely wet to fully dispersed, should avoid using alcohol or ketone solvents and acidification incomplete lipid solvent. Aromatic and solvents.
4 be sure to use high purity resin and solvent (low water content), such as containing a small amount of water, it is recommended to add gold powder pigment before the use of molecular sieve silosievea4 or aerosilr972 will remove the bronze powder.
Second, bronze powder additives 1. Usually, the ordinary copper powder has good floating performance, suggested that don't adding wetting agent and dispersant, otherwise it will reduce the floating (metal effect).
2 if in order to adjust the floating performance of gold powder, it can be appropriate to reduce the float will (add 0.1-0.5% citric acid). But this will reduce the metal effect.
3 if the adjustment of construction viscosity and drying time is still not able to obtain the ideal optical effect, that is, the pigment particles can not have a better directional arrangement, you can add a small amount of surface lubricant and leveling agent.
4. Generally speaking, the copper powder dispersing performance is better, if it is found that the precipitation phenomena, in the formulation of the join < 2.0% anti settling agent or thixotropic agent, such as bentonite, gas phase silicon dioxide.
Three, copper and gold powder 1 first to add the metal pigment, in the slow stirring, the fraction of the gold powder to add 1:1 or 2:1 solvent.
2 in the low shear stirring for about 15 minutes until a paste.
3 to add the required adjustment of the gold oil, fully mixing and mixing uniform stainless steel powder.
4 to adjust to the required viscosity with the solvent.
5. In order to avoid platelet gold powder particles the dispersion process curling and breaking is reduced optical effect, the best choice of blade agitator or disc disperser, medium speed mixing can be.
Four, copper and gold powder and its finished product storage, copper and gold powder and the finished products shall be stored at room temperature and dry conditions; the unused copper powder should be immediately sealed. Otherwise, the copper long time exposure to the air because of oxidation and deterioration