化工4-Chemicallist

Hydroxypropyl Starch Ether   is unfamiliar to many people, and thought to be a little different from common starch, but that’s not the case. HPS has a very small amount used in mortar products, and a very low addition amount enables to achieve very good quality effects. Hydroxypropyl Starch Ether is a  white fine powder  free from plasticizers, prepared from natural plants, which are modified, highly etherified, and spray dried. It is totally different from common or modified starch.   Hydroxypropyl methyl cellulose ​ (HPMC for short), also known as hypromellose or hydroxypropyl methyl cellulose ether, is prepared from selection of highly pure cotton cellulose, treated in 35-40℃ alkali liquor for 0.5h, squeezed to smash cellulose, and properly aged at 35℃ to make average polymerization degree of alkali fiberobtained within the required range. Put alkali fiber into the reaction kettle, then add propylene oxide and methyl chloride in order for 5h etherificati...

Looking for empty glue bottles?  This is a very convenient and economical way to store plastic bottles for liquid or creams to save space in the cosmetic container. Use these  empty glue bottles . Great for storing and dispensing liquids, hobby crafts, etc. At the same time, this is a good container for the home use, saving much space and you can easily fill refill from the storage containers without having to take up the bottles. The clear plastic can be reused and refilled with other liquid glue bottles, making it easy to dispense from the bottle contents, helping you to get used at any time. Empty glue bottles for eyelash art. This bottles can be reused for a long time. The round bottle jar can use for cosmetic creams and skin care products, small jewelry, and other liquid cosmetic containers to save space and time. It is very easy to carry and convenient to store. What's more, the clear plastic can go into bottles and containers with a lid cap. Convenient to use. Small, ex...

Polycarboxylate superplasticizer is a high-performance water reducing agent. It is a cement dispersant used in cement concrete applications. Polycarboxylate concrete superplasticizer is widely used in roads, bridges, dams, tunnels, high-rise buildings and other projects. This article mainly introduces the role and advantages of  polycarboxylate superplasticizer . According to the structure of the polycarboxylic acid main chain, the polycarboxylic acid series superplasticizer products can be divided into two types. A type of polyether having acrylic acid or methacrylic acid as the main chain and grafting different side chain lengths. The other type is a polyether having a length of different side chains of maleic anhydride. Based on these two types, a series of high-performance superplasticizer products with different characteristics have been derived. Before the appearance of the polycarboxylic acid superplasticizer, there is a lignosulfonate admixture, a naphthalene sulfonate form...

Tropinone  is a tropane alkaloid, usually in needle-like crystals (gasoline), used as an intermediate in the synthesis of atropine sulfate. It is an alkaloid molecule worth mentioning in the history of organic synthesis. Use tropinone to react with dimethyl carbonate in the presence of alkali to generate 2-methoxycarbonyl tropinone, and then hydrogenate the product in the presence of Raney nickel to generate methylecgonine, and finally methylecgonine is combined with Cocaine can be obtained by esterification of benzoyl chloride in the presence of pyridine. The synthetic method of Tropinone Wierstedt (1915 Nobel Laureate in Chemistry) used cycloheptanone as the starting material. Although the yield of each step in the route was high, the total yield was greatly reduced due to the number of steps, only 0.75%. . Of course, it was a great contribution to the development of synthetic organic chemistry to be able to synthesize such complex compounds artificially in the early 20th century...

Spherical Aberration in a Lens If a point object is placed on the axis of the large lens, images Ip and Im will be formed by the paraxial and marginal rays respectively. The paraxial rays of light from the image are at a longer distance from the lens than the marginal rays. The image is not sharp at any point on the axis. If the screen is placed perpendicular to the axis at AB, the image appears to be a circular patch of diameter AB. The patch of diameter AB is called the circle of least confusion and corresponds to the position of the best image. The distance Imap measures the longitudinal spherical aberration and the radius of the circle of least confusion measures the lateral spherical aberration. When the aperture of the lens is relatively large compared to the focal length of the lens, the cones of the rays of light refracted through different zones of the lens surface are not brought to focus at the same point on the axis. The marginal rays come to focus at a nearer...

AGM (Absorbent Glass Matt) Battery  and Gel Battery are often mistaken to be the same. Both batteries possess similar traits such as having deep-cycle capabilities, non-spillable design and both can be used in different orientations. The two battery types are also known for their low self-discharge, low-maintenance and vibration-resistant characteristics. However, AGM and Gel are two distinctly different types of batteries. Through this post, we’re comparing the two battery types in order to help you see which one suits your needs. CONTENTS 1. Overview on the key difference 2. What are AGM Batteries  3. What are GEL Batteries  4. Similarities 5. Differences Overview on the Key Difference The key difference between AGM and GEL batteries is that  AGM batteries  allow discharging up to 50%, whereas GEL batteries allow discharging up to 90%, ensuring a long service life. What are AGM Batteries? AGM batteries are...

Property of  Haloxyfop-R-methyl 97/95/98TC Haloxyfop-R-methyl 97/95/98TC Density 0.968 Boiling point 390.818ºC at 760 mmHg Flash point 2ºC Exact mass 375.04900 PSA 57.65000 LogP 4.48640 Refractive index 1.513 Storage conditions 2-8°C Water solubility 8.74 mg/L at 20 ºC   Application of Haloxyfop-R-methyl 97/95/98TC Haloxyfop-R-methyl 97%TC is an aromatic chlorooxyphenoxypropionic acid herbicide. For the control of weeds in soybean, cotton, peanuts, canola, kale, potato, watermelon, sunflower, and etc.  Weed Control Spectrum of Haloxyfop-R-methyl 97/95/98TC Haloxyfop-R-methyl is used post-emergence for control of annual and perennial grasses. Action Mode of Haloxyfop-R-methyl 97/95/98TC Selective herbicide, absorbed by roots and foliageand hydrolysed to haloxyfop-P, which is translocated to meristematic tissues, and inhibits their growth.    About Huimeng Bio-tech Huimeng Bio-tech  is a biotechnology enterprise integrated o...

GFS agricultural water storage tanks  are widely used as irrigation water storage tanks. Irrigation means using different technical equipment, enabling farmers to use water for their crops, when the natural resources are not sufficient. Irrigation allows for growing crops with a higher yield. In general, 94% of the watering of crops is done by sprinkler or surface irrigation. The other 6% take place with the more cost intensive and sophisticated techniques such as drip irrigation. Components of GFS tanks GFS tanks are made of individual sections including Glass-Fused-to-Steel, roof, tank ancillaries. All the individual sections are manufactured and finished in the factory according to strict structural specifications, with quality bends, welds and surface processing. The bolt holes and openings will be cut by CNC laser cutting machine automatically. Spray the glass coating on both sides of steel panels automatically. Coating thickness is controlled within 230 microns to 450 mi...

  Recently, YAMTOP's 1*20FCL High quality   Activated Alumina for air drying   was successfully shipped to customers. Activated alumina is a kind of alumina beads with extremely porous structure and high surface area-to-mass ratio. Activated alumina has a wide range of applications, including compressed air and gas drying. Let's take a look at how air dryer works. Air dryer's job Air dryer uses hygroscopic substances to collect water from the air. Desiccant is a kind of dry particles based on adsorption mechanism. Due to the interaction between molecules, the external pores of these substances serve as adsorption sites for specific molecules. The ability of this substance to do so is called physical adsorption. Silicon dioxide and activated alumina are two common physical adsorption desiccants in industry. The desiccant substance is contained in one or more containers in the desiccant dryer. The internal components are used to keep the d...

Environmental impact of pharmaceutical packaging Although regulatory bodies are asking the industry to reduce their packaging usage, they aren’t making suggestions around how this can be done. Sustainability initiatives are entirely up to the producer. It seems unlikely that the industry will move away from aluminium foil. Thanks to its superior barrier properties, aluminium foils remains the material of choice for pharma. Impenetrable to moisture, oxygen and other gases, as well as micro-organisms and light, aluminium foil helps to keep medication in perfect condition for longer. But there is a way to reap the rewards of aluminium foil, whilst reducing the environmental impact of packaging production. Aluminium foil is an important material in laminates and has wide application in food packaging. Its barrier function against the migration of moisture, oxygen and other gases, and volatile aroma, as well as against the impact of light is generally higher than any plastic laminate ma...

  Redispersible polymer powders (RDP)   are polymer emulsions which have been converted by a series of process such as high temperatures and pressures, spray drying and surface treatment to powdered thermoplastic resin materials. When mixed with water, these powdered organic binders can redisperse in water back into new emulsions with essentially identical properties to the original copolymer emulsions. The addition of redispersible polymer powders into mortar can increase the cohesiveness, cohesion and flexibility of mortar. First, it can improve the water retention of mortar and form a film to reduce evaporation of water. Second, it can improve the bond strength of mortar. The redispersible polymer powder was invented by a German named Wacker Hemie in 1953, which makes it possible to produce polymer modified dry-mix mortar. The history of redispersible polymer powder is only over 50 years up to now. In 1953, the world ’ s first batch of practical redispersible powder was inv...