Nanjing Chemical Material Corp.

  We like to focus on the ingredients of beauty products. But we prefer to touch the product and explore whether it really works. Alpha hydroxy acid is also known as AHA. It includes glycolic acid , lactic acid and citric acid. These products do not meet the needs.   Now we analyze the most popular ingredient in the world - glycolic acid.   Glycolic acid is a naturally occurring substance that is added to skin care products. It is good for the skin and restores skin elasticity and moisturization. The original state of glycolic acid is a powder composed of colorless crystals. It is tasteless. Let's first understand its benefits and its related products.   The Benefits of Glycolic Acid Glycolic acid is very effective for skin treatment because of its high purity. The premise is safe and correct use. Many skin care products contain glycolic acid. Sensitive muscles can also be used. Glycolic acid is non-irritating and it can be used in skin care. Add more glycolic acid to the facial cl

  Brief Introduction of Expandable Microsphere The color of the expandable microspheres  is white. Its average particle size is 10-30 μm. Its average density is about 1100 kg / m 3 . It has a thermoplastic shell comprising a low boiling liquid hydrocarbon. When the thermoplastic shell is softened at elevated temperatures, the increased pressure of the hydrocarbon will cause the microspheres to expand 40 to 100 times. When the internal pressure of the microsphere, the shell tension and the external pressure reach equilibrium, the microspheres no longer expand. Expandable microspheres have become the world's lightest application because the density of expanded microspheres is less than 30 kg / m3 (0.03 g / cm3).   Characteristics of Expandable Microsphere The first feature is cost savings. In thermoplastic materials such as PR, PP, PVC, PET, TPR, TPU, TPV, PA and paper/paperboard, expandable microspheres can be used as lightweight fillers and blowing agents. Expandable microspheres r

  Polyether polyol is abbreviated as polyether. It is an oligomer whose main chain contains ether bond (—R—O—R—) and the terminal group or side group contains more than 2 hydroxyl groups (—OH). It is prepared by addition polymerization of an initiator (a compound containing an active hydrogen group) with ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), etc. in the presence of a catalyst. The largest polyether producers are all common polyether polyols. Polyether polyols are produced with glycerol (glycerol) as the initiator and epoxide, by changing the PO and EO addition methods (mixed addition or separate addition), addition ratio, addition order and other conditions.   The main purpose 1. Detergent or defoamer L61, L64, F68 are used to prepare low-foam, high detergency synthetic detergent; L61 and L81 are used as defoamers in the papermaking or fermentation industry; F68 is used as an antifoaming agent in the blood circulation of artificial heart-lung machine to preven

 Application Of Sodium Lauryl Ether Sulfate In Shampoo The main surfactant used in shampoos is to impart a shampoo cleansing action through the washing process. There are many types of such surfactants, but mainly anionic surfactants. Nowadays, the amount of ammonium laureth sulfate (AESA) and (K12A) is also very large. The ammonium salt has a high foaming rate and is less irritating than the sodium salt. Some large brands use ammonium salt as the main surfactant. Sodium laureth ether sulfate  can be used in products for skin and sodium sulphate can be used in soap making.   Currently, the most commonly used shampoo main surfactants are lauryl ether sulfates (abbreviated as AES or SLES) and lauryl sulfates (AS or SLS), sometimes a mixture of the two. China generally uses sodium laureth polyoxyethylene ether sulfate and ammonium laureth polyoxyethylene ether sulfate, but mainly sodium salt.   The advantages of sodium salt 1. The sodium salt is less dependent on the pH of the system. 2.

  S odium A lpha O lefin S ulfonate  Application of washing powder The decontamination test showed that LAS and AOS showed good synergy in both phosphorous powder and phosphorus-free powder. Among the phosphorous detergent, LAS: AOS has the most significant synergy at 8:2. In the non-phosphorous washing powder with LAS and AOS as anionic active ingredients, the decontamination of AOS increased significantly when the proportion of anionic active components was greater than 20 %. The decontamination synergy of AOS in phosphorus-free washing powder is more prominent than that in phosphorous powder.   AOS and enzymes have better solubility. The activity of residual enzymes in detergent solutions containing domestic proteinases and imported proteinases(such as Savnase) was compared. Over time, the residual enzyme activity of anionic active groups divided into pure LAS was low. The residual enzyme activity is higher in detergent solution with AOS partial replacement or all substitution of LA

  Principle: Ethyl iodide synthesis  is usually reacted with ethanol, iodine and red phosphorus, but the reaction is slow, and it needs to be heated in a reflux device for several hours.   Supplies: Flask, straight condenser, beaker, red phosphorus, alcohol, iodine crystals, zeolite, 5% NaOH solution, anhydrous calcium chloride.   Operation: 2 g of red phosphorus and 25 ml of alcohol were added to a 125 ml flask, and 18 g of finely divided iodine crystals were added in portions under shaking, followed by the addition of 3 zeolites. A straight condenser was placed on the flask and allowed to reflux for half an hour by heating in a water bath. After the reaction is completed, the mixture is cooled, and the reflux straight condenser is discharged, and then the condenser is replaced with a common distillation apparatus. It should be noted that the receiver should be filled in a cold water bath to prevent the produced iodoethane from being volatilized.   The iodoethane was distilled off in

  The nature and use of glycyrrhizic acid Licorice is the root of leguminous plants, mainly produced in Mongolia, Shanxi, Gansu, Ningxia and Xinjiang. Licorice is sweet, so it is also known as sweet grass and honey grass. There are four main chemical components: triterpenoids, flavonoids, alkaloids and polysaccharides. Among them, the triterpenoids include glycyrrhizic acid and hydroxyglycyrrhetinic acid.   Glycyrrhizic acid is also known as glycyrrhizin. It is white crystal, crystallized with glacial acetic acid, and has a strong sweet taste. The molecular formula is C42H62O16 and the molecular weight is 822.90. The pure product is a white, odorless crystalline powder. Its melting point is 212 ℃ ~ 217 ℃, soluble in hot water and hot dilute ethanol, almost insoluble in anhydrous ethanol or ether. Glycyrrhizic acid is often present in plants in the form of calcium, potassium, ammonium salts, and the like. The ammonium salt extracted from the licorice extract prepared from the licorice r

  The DMC catalyst   is double metal cyanide catalyst. Compared with similar polyols made using basic(e.g., KOH)catalysts, polyether polyols made from the catalyst have low unsaturations, narrow molecular weight distributions, have high molecular weight, and are useful in making a variety of polyurethane products. DMC catalyst   is highly active in epoxide polymerization reactions used to prepare polyether polyols.   We can yield the DMC more than 20000 kg within one year, and thus afford to produce 50 ～ 70 ten thousand tons of polyols. This catalyst is white or light yellow powder, is suitable for preparation of polyols with 1~6 functions. Compared with basic catalysts, this catalyst can be used with less amount (30ppm), and reaction time of polymerization is reduced largely, and the polyols products are not necessary to be refined. The DMC is suitable for using in common epoxide polymerization reactors, but it can be better if reactors have both of stirring and cycling systems.   Whe