Hpmc
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辉 李HPMC is one of cellulose ethers, is short for hydroxypropyl methyl cellulose. It is also called hypromellose,or 2-hydroxypropyl methyl cellulose.
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This document discusses ingredients and preparation methods for semisolid dosage forms. It covers the various ingredients used including active pharmaceutical ingredients, bases, preservatives, humectants, antioxidants, emulsifiers, gelling agents, permeation enhancers and buffers. It describes the different types of bases for semisolid formulations including oleaginous, absorption, emulsion and water soluble bases. It also discusses common preservatives, antioxidants, gelling agents, permeation enhancers and humectants used. Finally, it covers preparation methods for semisolids like ointments and creams as well as suppositories and includes methods like trituration, fusion, chemical reaction and emulsification.
RESSOL ECO FRIENDLY PLASTICIZER NEW
RESSOL is an eco-friendly plasticizer that can replace phthalate plasticizers like DOP and DBP in PVC products. It is efficient, flexible, and safer than traditional plasticizers. RESSOL can replace up to 30% of DOP without changing processing techniques or impacting product performance. It has properties like heat and electrical resistance that make it suitable for uses in toys, wires, pipes, flooring, and other applications. RESSOL is soluble in organic solvents, consistent with PVC, and improves plasticization while shortening processing times and lowering costs compared to DOP.
Rheology
This document discusses rheological additives used in cosmetics. It begins by introducing rheology and its importance in cosmetics. It then classifies rheological additives into aqueous and non-aqueous categories. The main aqueous additives discussed are rheological associate thickeners, hectorite, and bentone hydrophilic clays. The main non-aqueous additives discussed are bentone organophilic clays, bentone gel, and thixcin R. Finally, applications of these additives in products like sticks, mascara, emulsions, and sunscreens are outlined.
1.0 polymerscience 141002020922-phpapp02 ok
This document provides an introduction to polymer science and its applications in pharmaceutical formulations. It begins by defining polymers as high molecular weight compounds composed of repeating monomer units connected by covalent bonds. Common polymers are then classified based on their source (natural, synthetic, semi-synthetic), biodegradability, interaction with water, and polymerization mechanism (addition, condensation). Examples of important polymers for drug delivery discussed include hydroxypropyl methylcellulose, microcrystalline cellulose, guar gum, and polyethylene glycol. The characteristics of an ideal polymer system for drug delivery are also outlined.
High-Performance UV-Curable PUDs With High Renewable Carbon Content
This presentation addresses the use of UV-curable polyurethane dispersions for sustainable coatings. Features, properties, effects and project conclusions are discussed. For more information, please visit www.sartomer.com or follow Sartomer on Twitter @SartomerGlobal. Thanks for viewing!
Polyester recyling
1. The document discusses the recycling of polyester, specifically polyethylene terephthalate (PET). PET is commonly used in textiles and plastic bottles.
2. Recycled PET (rPET) is considered more environmentally friendly than virgin PET as it uses less energy and emits fewer carbon emissions. rPET can be used to make new textiles, carpets, and sleeping bags.
3. The document then outlines processes for depolymerizing and recycling PET waste through glycolysis. The recycled PET can be used to produce polyester polyols, coatings, textile softeners, and hydrophobic dyes. It can also be used as reinforcement in concrete and to strengthen recycled paper.
Urea formaldehyde
Urea formaldehyde is a thermosetting plastic produced from the condensation reaction of urea and formaldehyde. It is commonly used in adhesives, finishes, and particle board. The manufacturing process involves precisely weighing and mixing urea and formaldehyde in an aqueous solution with ammonia as a catalyst. The resulting colorless solution can be spray dried or mixed with fillers. Upon heating and curing, the prepolymers crosslink to form a rigid three-dimensional polymer network. Urea formaldehyde resins have high strength but lower heat resistance compared to other plastics, and releases toxic fumes when heated, though it remains widely used in wood composites and moldings due to its low cost.
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Hpmc
- 1. Chemical Name: Hydroxy Propyl Methyl Cellulose CAS NO.: 9004-65-3 Abbreviation: HPMC MHPC Industries: Construction, Coating, Paints, Detergent HPMC is one of cellulose ethers, is short for hydroxypropyl methyl cellulose. It is also called hypromellose,or 2-hydroxypropyl methyl cellulose. Material: High purlty Refined cotton HPMC is a type of non-ionic cellulose ether, white powder appearance, odorless and tasteless, soluble in water and most polar organic solvents. Its water solution has a surface activity, high transparency, stable performance. HPMC has a thermal gel properties, after heating, the product solution formed the gel precipitation, dissolving after cooling. Different specifications products have different gel temperature. Solubility changes with viscosity's difference. The lower viscosity, the higher solubility, different specifications HPMC have difference in properties, dissolving HPMC in water won't be affected by PH value. Granularity: 100mesh, over 99% passing rate, Bulk Density: 0.25-0.70g(usu. 0.5g or so), Proportion: 1.26-1.31, Color Temperature: 190-200℃
- 2. Carbonization Temperature: 280-300℃,Surface Tension: 42-56dyn/cm With the increase of Methoxyl, HPMC's gel point decreases, the rise of water solubility and surface activity. HPMC has the features of thickening, salt removing, low ash content, fine film-forming properties. and wide range of anti-ether, dispersion, and adhesion properties. Properties: 1.Enhances water retention--improved water retenion can protectcement and plaster against poor solidification and cracking due to speedy drying and inefficient mixing with water. 2.Workablilty--mortar plasticizing quality can be improved, which in turn will improved the workability of painting and working efficiency. 3.Binding--Due to increased plasticizing quality, mortar can be a better binde. 4.Slipping resistance--Due to the thickening action of Cellulose Ether,the slipping phenomena of mortar from substance to be bound can be prevented more efficiently.
- 3. Package: A. Standard Packing: In 25kg paper bags inner with PE bags B. Big Bag or other special packages are possible on request. Safety: This product is non-toxic and has no irritation to skin and mucous membrane. Product Transportation and Storage: Prevent from sun, rain and moisture and keep it in a sealed dry place. Hydroxypropyl methylcellulose is a nonionic cellulose ether with a white powder appearance, odorless and tasteless, soluble in water and most polar organic solvents, proper ratio of ethanol/water, propanol/water, dichloro Ethane and other insoluble in ether, acetone, anhydrous ethanol. Hpmc , methyl cellulose can be used in building materials, coatings industry, synthetic resin, ceramic industry, medicine, food, textile, agriculture, household chemicals, etc. It’s outstanding functions: Thermal gelation; Effective binding; Thickening and stabilizing; Water retention and softness improving；
- 4. The production process of Hydroxypropyl Methylcellulose (HPMC) Reaction: Rcell – OH+ NaOH+ CH3Cl +CH2OCHCH3 →Rcell – O – CH2OHCHCH3 + NaCl + H2O production process of HPMC Raw materials: refined cotton, sodium hydroxide, chloromethane, and epoxypropane. Approximate raw material consumption for 1mt HPMC List Spec Consumption Refined cotton Water≤6% 0.93MT
- 5. Sodium hydroxide ≥50 % 1.15MT Methyl chloride ≥99 % 0.75MT Propylene oxide ≥99 % 0.25MT All factors affecting product cost ■Raw materials The pricing of refining cotton, sodium hydroxide, methyl chloride, and propylene oxide will have a big influence on product cost. Among these raw materials, the price of refined cotton is the key factor which determines the production cost of HPMC. From the following chart, we will find the cotton production by country worldwide in 2017/2018 (in 1,000 metric tons) With around 100,000 farmers cultivating cotton, China is the second biggest cotton producing country. Therefore, Chinese HPMC has very big competitive advantages on production cost. Contact Us JinZhou HPMC cellulose co.,ltd Address:Chemical Industrial Development Zone Jinzhou Hebei,China. Email:sales@hpmccelluloseether.com Site: www.hpmccelluloseether.com