The brightening of plastics is to improve the surface gloss or smoothness of plastic products. In addition to the reasonable selection of raw materials, specific methods include addition brightening methods, blending brightening methods, shape control brightening methods, molding equipment smoothness control, secondary processing brightening methods and surface coating brightening methods, etc.
Methods for adding brightness to plastics:
1. Glossier agents such as polyether, higher aliphatic hydrocarbons, Amide compounds, halogenated heavy metals, surfactants, stearyl alcohol, etc.;
2. External lubricants liquid paraffin, polyethylene wax, stearic acid, bisstearamide, silicone oil, etc.;
3. Nucleating agents such as phosphoric acid series;
4. Special colorants, fluorescent whitening agents, etc., especially the high-quality whitening agent LD-Y01, the added amount is very small, only A few parts in ten thousand, but it can absorb ultraviolet light very well and reflect blue-white light, making plastic products whiter, brighter and more colorful, achieving a brightening effect. At the same time, high-quality whitening agents have very good weather resistance and can be used for a long time. Discoloration, non-fading.
Introducing stearyl alcohol in the next issue:
Stearyl alcohol appears as white flakes Or granular solid, fragrant, insoluble in water, soluble in ethanol, ether, benzene, and chloroform. It can be obtained by hydrolysis of pilot whale oil, hydrogenation of stearic acid under the catalysis of copper chromate, or reduction of ethyl stearate with saturated ethanol. It can also be obtained by controlling the polymerization reaction of ethylene under the action of alkyl aluminum, and then obtain the heptadecene fraction through oxo synthesis.
Stearyl alcohol is widely used in daily chemicals, textiles, printing and dyeing and other industries. It is a raw material for manufacturing surfactants, emulsifiers and various additives. The specific uses are as follows:
1. Stearyl alcohol can be used instead of cetyl alcohol, such as as a dispersant in pharmaceuticals.
2. Used as the base material (emulsifier) of creams and lotions in cosmetics.
3. Used as raw materials for rice field insulation agents, water surface covering agents, defoaming agents, polishing agents, lubricants, flotation agents, softeners (pharmaceutical ointments) and color formers and antioxidants for color films. Agent, stearyl tertiary amine, stearyl ester.
4. Can be used to produce surfactants (Pingpingjia) (18-16 alcohol can be used instead), synthetic resins and synthetic rubbers, color film couplers, etc.
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