Nanjing Chemical Material Corp.

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 syst...

  Affected by public health incidents, NBR latex   is like a dark horse that has attracted the attention of the international market. Nitrile rubber and NBR latex are very different in use.   1. The difference in performance between nitrile rubber and NBR latex Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high abrasion resistance, good heat resistance, and strong adhesion. . Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance, and slightly lower elasticity. Nitrile rubber is mainly used to make oil-resistant rubber products.   Carboxylic nitrile latex is obtained by introducing methacrylic acid or methacrylate ternary copolymer during polymerization. Since the carboxyl nitrile nitrile latex introduces a more polar carboxyl group into the molecular backbone, it furt...

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. ...

Monoammonium glycyrrhizinate in China is a chemical substance. This product is mainly used for the treatment of chronic persistent hepatitis, chronic active hepatitis, liver poisoning, and early liver cirrhosis. Production method It is obtained by using crude glycyrrhizic acid (content about 50%, weight method) as raw material and acidic ethanol as extractant. 50g crude glycyrrhizic acid was added to 170ml of 95% ethanol acidified with hydrochloric acid (Ph value 3.5 ～ 4.0), and stirred and extracted at 40 ～ 50 ℃ for 4h. After filtration, the filter residue was extracted with 100 ml of ethanol under the same conditions for 3 hours. The extracts were combined, and ammonia water or ammonia gas was added dropwise with stirring to make the Ph of the solution 7.2 to 7.5, and allowed to stand at room temperature for 0.5 h to completely precipitate. The precipitate is triammonium glycyrrhizinate, which is dispersed into a paste with an appropriate amount of glacial acetic acid. If necessa...

DMC catalyst  is a new type of high-performance catalytic olefin oxide ring-opening polymerization catalyst, suitable for synthesis of olefin oxide polyether containing 1-6 functional groups. DMC catalyst manufacturers usually use low molecular weight organic complexing agents. The complexing agents beneficially affect the activity of the catalyst for epoxide polymerization. The production of polyether with DMC catalyst has the following advantages: Low production and running costs 1) No post-processing process and faster reaction speed increase the production capacity of the device by several times. 2) No post-treatment process reduces equipment investment, unit product energy consumption and water consumption, unit product solid waste and waste water production, and improves product yield. 3) It can produce higher molecular weight products with molecular weight of more than 2000 per mole of hydroxyl group. 4) The produced polyether has the characteristics of narr...

Features of 1 3 propanesultone electronic Product Name: 1,3-Propane Sultone Chemical Formula: C3H6O3S C as 1120-71-4 Dangerous Grade: 6.1 Technical Data of 1,3-Propane Sultone ITEMS SPECIFICATIONS Appearance <50apha Assay (%) >99.5 Freezing point (℃) 31.2 Refraction index(40℃) 1.453 Package and Storage: 25kg/plastic drum Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Application /Application Industries: general-purpose sulfonating agent pharmaceutical intermediate surfactant brightener dyes lithium batteries (electronic grade) biochemistry textile lubrication wastewater treatment