Products
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Optical Brightener EBF-L
The fluorescent whitening agent EBF-L must be fully stirred before use to ensure the whiteness and color consistency of the processed fabric. Before whitening the fabrics bleached by oxygen bleaching, the residual alkali on the fabrics must be fully washed to ensure that the whitening agent is fully colored and the color is bright.
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Fluorescent Brightener DT
Mainly used for whitening polyester, polyester-cotton blended spinning, and whitening nylon, acetate fiber and cotton wool blended spinning. It can also be used for desizing and oxidative bleaching. It has good washing and light fastness, especially good sublimation fastness. It can also be used for whitening plastics, coatings, paper making, soap making, etc.
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Optical Brightener CXT
Fluorescent brightener CXT is currently considered to be a better brightener for printing, dyeing and detergents. Due to the introduction of morpholine gene into the whitening agent molecule, many of its properties have been improved. For example, the acid resistance is increased, and the perborate resistance is also very good. It is suitable for the whitening of cellulose fibers, polyamide fibers and fabrics.
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Optical Brightener 4BK
The cellulose fiber whitened by this product is bright in color and non-yellowing, which improves the shortcomings of the yellowing of ordinary brighteners and greatly increases the light resistance and heat resistance of the cellulose fiber.
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Optical Brightener VBL
It is not suitable to be used in the same bath with cationic surfactants or dyes. The fluorescent whitening agent VBL is stable to the insurance powder. Fluorescent brightener VBL is not resistant to metal ions such as copper and iron.
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Optical Brightener ST-1
This product is used at room temperature to within 280℃, can degrade 80 times of soft water, acid and alkali resistance is pH = 6~11, it can be used in the same bath with anionic surfactants or dyes, non-ionic surfactants, and hydrogen peroxide. In the case of the same dosage, the whiteness is 3-5 times higher than that of VBL and DMS, and the alignment energy is almost the same as that of VBL and DMS.
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O-nitrophenol
o-nitrochlorobenzene is hydrolyzed and acidified by sodium hydroxide solution. Add 1850-1950 l of 76-80 g / L sodium hydroxide solution into the hydrolysis pot, and then add 250 kg of fused o-nitrochlorobenzene. When it is heated to 140-150 ℃ and the pressure is about 0.45MPa, keep it for 2.5h, then raise it to 153-155 ℃ and the pressure is about 0.53mpa, and keep it for 3h.
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Ortho Amino Phenol
1. Dye intermediates, used in the manufacture of sulfur dyes, azo dyes, fur dyes and fluorescent whitening agent EB, etc. In pesticide industry, it is used as raw material of insecticide phoxim.
2. It is mainly used for making acid mordant Blue R, sulfurized yellow brown, etc. it can also be used as fur dye. In the cosmetics industry, it is used to make hair dyes (as coordination dyes).
3. Determination of silver and tin and verification of gold. It is the intermediate of diazo dyes and sulfur dyes.
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Optical Brightener ST-3
This product is used at room temperature to within 280℃, can degrade 80 times of soft water, acid and alkali resistance is pH = 6~11, it can be used in the same bath with anionic surfactants or dyes, non-ionic surfactants, and hydrogen peroxide. In the case of the same dosage, the whiteness is 3-5 times higher than that of VBL and DMS, and the alignment energy is almost the same as that of VBL and DMS.
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1,4-Phthalaldehyde
Add 6.0 g of sodium sulfide, 2.7 g of sulfur powder, 5 g of sodium hydroxide and 60 ml of water into a 250 ml three necked flask with reflux condenser and stirring device, and raise the temperature to 80 ℃ under stirring. The Yellow sulfur powder dissolves, and the solution turns red. After refluxing for 1 h, dark red sodium polysulfide solution is obtained.
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Optical Brightener SWN
Optical brightener SWN is Coumarin Derivatives. It is soluble in ethanol, acidic liquor, resin and varnish. In water, the solubility of SWN is only 0.006 percent. It functions by emitting red light and present purple tincture.
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Optical Brightener KCB
Optical brightener KCB is one of the best products among many fluorescent whitening agents. Strong whitening effect, bright blue and bright color, it has good heat resistance, weather resistance and chemical stability. It is mainly used for the whitening of plastic and synthetic fiber products, and it also has obvious brightening effect on non-ferrous plastic products. It is also widely used in ethylene/vinyl acetate (EVA) copolymers, which is an excellent variety of optical brighteners in sports shoes.
