China Propylene glycol, Dipropylene glycol Suppliers & Manufacturers - TSR CHEM

URL: https://www.tsrchem.com/new-process-progress-of-polyether-polyos.html In response to the demand for polyurethane products, various polyether polyol products have emerged one after another, of which environmentally friendly, flame retardant and bio-based polyether polyols are the main representatives. At present, the development of environmentally friendly PU series products is receiving more and more attention. As the transitional blowing agent HCFC-141b is replaced, the research of the third generation blowing agent is getting deeper and deeper, and the HFC-type blowing agent represented by HFC-245fa and HFC-365mfa is the most ideal substitute for HCFC-141b at present. The corresponding HFC-245fa polyether polyol for polyurethane hard foam is also called the development focus of research institutions. The main domestic research and development enterprises and research institutes include enterprises such as Shandong Dongda Group and research institutes such as Jiangsu ...

URL: https://www.tsrchem.com/overview-of-polyether-polyols.html Polyether polyols are produced by the ring-opening polymerization of low molecular compounds containing active hydrogen, such as (alcohols, amines) as starting agents, with compounds containing epoxy structures under the action of catalysts. Polyether polyol can be generally divided into four categories.  One is poly propylene oxide polyol (PPG), which is made by polymerization reaction with propylene oxide or copolymerization reaction with propylene oxide and ethylene oxide with polyol or organic amine as the starting agent, and is the main product series of polyether polyol in China, and also the main product series used in polyurethane production. Secondly, it is polymer graft polyether polyol (POP), which is made by graft polymerization reaction of acrylonitrile or styrene with polyol, etc. It can obviously improve the hardness of soft polyurethane foam and enhance its load-bearing property, and i...

URL: https://www.tsrchem.com/polyether-polyol-production-process.html The main raw materials for the production of polyether polyols are starting agents, epoxides, catalysts, catalyst removers or deactivators, and post-treatment agents. The starting agents are low molecular compounds containing hydroxyl groups and low molecular compounds containing amino groups or hydroxyl and amino groups. Commonly used are propylene glycol, glycerol, trimethylolpropane, PTMEG, ethylenediamine pentaerythritol, xylitol, triethylenediamine, sorbitol, sucrose, bisphenol A, bisphenol S, tris(2-hydroxyethyl) isocyanate, toluenediamine, etc.; when using aromatic or heterocyclic polyol or polyamine starter, the above structure will be introduced into the polyether polyol structure, which can make the generated polyurethane material have better dimensional stability, and Heat and flame resistance. These starting agents include bisphenol A, bisphenol S, tris(2-hydroxyethyl) isocyanate, toluenediami...

URL: https://www.tsrchem.com/preparation-and-application-of-1-4-butanediol.html A primary alcohol with the chemical formula HOCH2CH2CH2CH2OH is butane-1,4-diol . It is a clear, thick liquid. It is one of butanediol's four stable isomers. preparation Acetylene interacts with two equivalents of formaldehyde in industrial chemical synthesis to produce butyne-1,4-diol.Butane-1,4-diol is produced by hydrogenating butyne-1,4-diol. In the Davy method, it is also produced on an industrial scale from maleic anhydride, which is first transformed into methyl maleate ester and then hydrogenated. Other pathways come from succinic acid, butadiene, and allyl acetate.A marketed biological approach to BD makes use of a genetically altered organism.4-hydroxybutyrate is the intermediary in the biosynthesis. Industrial use Industrial applications for butane-1,4-diol include usage as a solvent for the production of certain polymers, elastic fibers, and polyurethanes. Th...

URL: https://www.tsrchem.com/what-is-tetrahydrofuran-used-for.html Oxolane, also known as tetrahydrofuran (THF), is an organic molecule with the formula (CH2)4O. The substance is categorized as a cyclic ether, a kind of heterocyclic substance. It is an organic liquid that is colorless, water-miscible, and has a low viscosity. The principal application is as a precursor to polymers. THF is a multipurpose solvent since it is polar and has a large liquid range. The annual production of tetrahydrofuran is about 200,000 metric tons. The 1,4-butanediol is dehydrated using an acid catalyst in the most common industrial procedure. The process is comparable to that used to make diethyl ether from ethanol. Acetylene and formaldehyde are condensed to produce butanediol, which is then hydrogenated. By first oxidizing n-butane to crude maleic anhydride and then catalyzing hydrogenation, DuPont created a method for creating THF.A third significant commercial approach involves hydrogenat...

URL: https://www.tsrchem.com/industry-prospects-and-process-technology-for-n-methylpyrrolidone.html N-Methylpyrrolidone (NMP), (N-Methyl-2-pyrrolidone) is a non-protonic solvent characterised by high polarity, high boiling point, low viscosity, low volatility, high thermal and chemical stability. It has a wide range of applications as a high-performance solvent in the production of lithium-ion batteries, polymer synthesis, electronic chemicals, insulating paints and many other fields. NMP sources can be divided into two categories: synthetic NMP and recycled NMP. Synthetic NMP refers to the chemical synthesis of NMP products, the industrial production route is the condensation of γ-butyrolactone (GBL) and monomethylamine as raw materials to produce NMP products; recycled NMP refers to the recovery and purification of NMP waste liquid used as a solvent to achieve recycling. NMP market is huge and on the rise In the past 5 to 10 years, due to the rapid development...

URL: https://www.tsrchem.com/lithium-battery-industry-chain-continues-to-soar-n-methyl-pyrrolidone-nmp-leads-investment-boom.html Li-ion battery industry chain continues to experience high prosperity NMP consumption will continue to grow rapidly N-Methylpyrrolidone (NMP),（N-Methyl-2-pyrrolidone）is a very important auxiliary material for the production of lithium-ion battery electrodes and is the most commonly used solvent in the front-end dosing process of lithium-ion batteries. In the dosing stage, NMP is used as a solvent for PVDF to disperse the slurry, forming a homogeneous medium and maintaining the stability of the slurry for a long time within a certain viscosity range; in the coating stage, NMP is used as the main liquid carrier for the slurry and its good wettability and fluidity with the metal substrate helps the slurry to be evenly coated on the metal substrate with a stable thickness; in the coating and baking stage, NMP evaporates from the wet film ...

URL: https://www.tsrchem.com/the-distinction-between-ethylene-and-propylene-glycol-in-antifreeze.html Propylene glycol and ethylene glycol differ from one another in antifreeze in terms of both toxicity and performance effectiveness. While propylene glycol has relatively low toxicity, ethylene glycol has far better heat transfer qualities. What are glycols? Glycol is an organic chemical molecule from the family of alcohols. The glycol molecule, which is another name for diol, has two hydroxyl groups connected to various carbon atoms. The chemical family of alcohols includes glycols. Despite having numerous uses in a wide range of industries, such as in the production of resins, inks, and polyethylene terephthalate (ethylene glycol) and cosmetics and preservatives ( propylene glycol ), both substances are frequently used in antifreeze and coolant mixtures. What is antifreeze? A pure base substance called ethylene or propylene glycol is used in antif...

URL: https://www.tsrchem.com/lithium-battery-industry-chain-continues-to-soar-n-methyl-pyrrolidone-nmp.html N-Methylpyrrolidone (NMP) is a non-protonic solvent with the advantages of strong polarity, high boiling point, low viscosity, low volatility, thermal and chemical stability, etc. It is widely used as a solvent in many fields such as lithium-ion battery manufacturing, polymer synthesis, electronic chemicals, insulating paints, etc. According to the source, NMP can be divided into two categories, synthetic NMP and recycled NMP. Synthetic NMP is a new product made by chemical synthesis. The condensation of γ-butyrolactone (GBL) with monomethylamine to make NMP is the current synthetic route for industrial production; recycled NMP is a recycled product after the recovery and refinement of NMP used as a solvent. In the synthesis of NMP, the vast majority of manufacturers use the route of dehydrogenation of 1,4-butanediol (BDO) to GBL, followed by ammoniacal condensa...

URL: https://www.tsrchem.com/the-difference-between-propylene-and-polypropylene.html The main distinction between polyethylene glycol and propylene glycol is that the former is a polymer, while the latter is a single molecular substance known as a diol. Important organic compounds include polyethylene glycol and propylene glycol. Petroleum is the source of the polymer complex known as polyethylene glycol, whose chemical formula is H-(O-CH2-CH2)n-OH. Propylene glycol, whose chemical formula is CH3CH(OH)CH2OH, is a thick, colorless liquid. What is Polyethylene Glycol? Petroleum is the source of the polymer complex known as polyethylene glycol, whose chemical formula is H-(O-CH2-CH2)n-OH. This chemical has a wide range of uses, including both industrial and medical ones. Polyethylene glycol has a variety of uses in science and medicine, including as a base for several laxatives, an excipient, a lubricant coating for various surfaces in aqueous and non-aqueo...

 URL： https://www.tsrchem.com/the-overview-of-polypropylene-glycol.html Polypropylene glycol  is a polymer with the molecular formula H (C3H6O) nOH and a molecular weight of 400–2000. It is a colorless to yellowish sticky liquid. non-volatile. non-corrosiveness. Its monoester is a non-ionic surfactant and can also act with alcohols to produce ether. It is a solvent for vegetable oil, resin, and paraffin and is also used in the preparation of alkyd resin, emulsifiers, reverse emulsifiers, lubricating oils, plasticizers, etc. Polymerization Polypropylene glycol is produced by ring-opening polymerization of propylene oxide. An alcohol serves as the catalyst, and a base—typically potassium hydroxide—acts as the initiator. The polymer is linear when ethylene glycol or water is used as the initiator. A polymer branches out when an initiator with many functions, such as glycerine, pentaerythritol, or sorbitol, is used. Propylene oxide is traditionally polymeri...

 URL： https://www.tsrchem.com/what-is-salicylic-acid-and-the-use-of-salicylic-acid.html Salicylic acid is an organic compound with the formula HOC 6 H 4 COOH. A colorless, bitter-tasting solid, it is a precursor to and a metabolite of aspirin (acetylsalicylic acid). It is a plant hormone and has been listed by the EPA Toxic Substances Control Act (TSCA) Chemical Substance Inventory as an experimental teratogen. The name is from Latin salix, for willow tree. It is an ingredient in some anti-acne products. Salts and esters of salicylic acid are known as salicylates. Salicylic acid-soaked cotton pads can be used to chemically exfoliate the skin. The outer layer of the skin is frequently removed with the use of the medicine salicylic acid. As a result, it is applied to treat ichthyosis, ringworm, psoriasis, acne vulgaris, and warts.Salicylic acid, like other hydroxy acids, is a common component in skincare products for the treatment of warts, calluses, kera...

 URL： https://www.tsrchem.com/how-to-prepare-ethylene-glycol.html Ethylene glycol is also known as glycol, 1,2-ethyleneglycol, or EG. The chemical formula (CH2OH) 2 is the simplest binary alcohol. Ethylene glycol is a colorless, odorless, sweet liquid with low toxicity to animals. Ethylene glycol can interdissolve with water and acetone, but it has less solubility in ethers. Used as a solvent, antifreeze, and raw material for synthetic polyester. Polyethylene glycol (PEG) is a phase transfer catalyst also used for cell fusion; its nitrate is an explosive. Ethylene glycol is mainly used in making polyester, polyester resin, hygroscopic agent, plasticizer, surfactant, synthetic fiber, cosmetics, and explosives. It is also used as dyes, ink solvent, preparation of engine antifreeze, gas dewatering agent, and manufacturing resin. It can also be used in cellophane, fiber, leather, and adhesive wetting agents. Can produce synthetic resin PET, fiber grade PET, namely polyeste...

URL： https://www.tsrchem.com/properties-and-applications-of-polyvinyl-alcohol.html Polyvinyl alcohol (PVA) , which is essentially made from polyvinyl acetate through hydrolysis, is easily degradable by biological organisms and, in water, is a solubilized crystalline polymer. PVA is an artificial polymer that has been used worldwide since the first half of the 20th century. It has been applied in the industrial, commercial, medical, and food sectors and has been used to produce many end products, such as lacquers, resins, surgical threads, and food packaging materials that are often in contact with food. PVA is a biodegradable imitation of natural polymers used in paper coating and textile sizing. This polymer is widely used by blending with other polymer compounds, such as biopolymers and other polymers with hydrophilic properties; it is utilized for various industrial applications to enhance the mechanical properties of films because of its compatible structure and h...

 URL： https://www.tsrchem.com/the-properties-and-production-methods-of-mdi.html MDI is a polyurethane material synthesized by isocyanate, polyol, and their combined additives. With its excellent properties, various varieties, and broad uses, it is unique among many synthetic materials and has become one of the fastest-developing materials today. Diphenylmethane-4,4-diisocyanate is a light yellow solid. It is not soluble in water. It may be toxic through ingestion, inhalation, or skin absorption. With aniline as a raw material, reaction with formaldehyde, condensation in acid solution, neutralization with alkali, and then distillation can produce diamino dibenzane, which can then be made by reacting with carbonyl chloride and then distilling and refining. The primary products of this product are widely used in polyurethane coating, in addition to waterproof materials, sealing materials, pottery materials, etc.; polyurethane foam made of this product for warm...

URL： https://www.tsrchem.com/the-chemical-properties-of-tdi-and-corresponding-emergency-measures.html Toluene diisocyanate (TDI) is an organic compound with the formula CH 3 C 6 H 3 (NCO) 2 . Toluene diisocyanate is also known as toluene diisocyanate, 2,4-toluphenyl diisocyanate (toluene-2,4-diisocyanate), diphenyl, 2,4-diisocyanate, and 4-methyl-1,3-benzenyl diisocyanate. Two of the six possible isomers are commercially important: 2,4-TDI (CAS: 584-84-9) and 2,6-TDI (CAS: 91-08-7). Tolene diisocyanate is a transparent liquid with a colorless or pale yellow irritating odor that turns yellow under ultraviolet light. It is heated for easy polymerization in an alloy steel container and can react with hydroxyl compounds, water, amines, and compounds with active hydrogen to form carbamate, urea, carbourea, and urea. It can be miscible with ethanol (decomposition), ether, acetone, carbon tetrachloride, benzene, chlorobenzene, kerosene, olive oil, and diethylene glycol methyl eth...

URL： https://www.tsrchem.com/a-new-player-enters-a-state-owned-enterprise-in-xinjiang-lays-out-natural-gas-method-bdo.html Karamay Fucheng Energy Natural Gas Comprehensive Utilization Project, with an estimated total investment of USD 500 million, is located in Baiyatan District Industrial Park and proposes to build 100,000 tons/year of 1,4-butanediol (BDO) plant, including 40,000 tons/year of acetylene, 100,000 tons/year of methanol, 220,000 tons/year of formaldehyde, etc. BDO is one of the main raw materials of PTMEG. The total land acquisition area of the project is about 550,000m2. The project uses natural gas as raw material to produce acetylene, which requires a total of 500 million cubic meters of natural gas per year, and is expected to purchase natural gas from PetroChina Gas Sales Xinjiang Branch. After the acetylene tail gas is separated by the gas separation device, the separated hydrogen is sent to the BDO plant and the remaining part is sent to the methanol pl...

 URL: https://www.tsrchem.com/propylene-glycol-toxicity-and-treatment.html Propylene glycol is a clear,colorless and viscous liquid with a faintly sweet taste. Its chemical structure is CH3CH[OH]CH3OH. Propylene glycol and ethylene glycol have similar physical properties and uses. Their chemical structures differ by only one methyl group (ethylene glycol = HOCH2CH2OH; propylene glycol = CH3CH[OH]CH2OH). Humans are susceptible to acute poisoning from ethylene glycol. Contrarily, propylene glycol is a food and pharmaceutical component that is "generally recognized as safe". Although propylene glycol is frequently used as a solvent for intravenous drugs, it has the potential to be hazardous when given in high concentrations quickly. The toxicity of propylene glycol often does not affect exposures in the workplace or environment. The most frequent cause of propylene glycol toxicity is iatrogenic propylene glycol overdose. An iatrogenic overdose of propylene g...

 URL: https://www.tsrchem.com/introduction-to-dipropylene-glycol-and-propylene-glycol.html Dipropylene glycol is a mixture of three isomeric chemical compounds, 4-oxa-2,6-heptandiol, 2-(2-hydroxy-propoxy)-propan-1-ol, and 2-(2-hydroxy-1-methyl-ethoxy)-propan-1-ol. It is a colorless, nearly odorless liquid with a high boiling point and low toxicity. Synonyms for propylene glycol (ATSDR1997) include 1,2-propanediol; 1,2-dihydroxypropane; methyl glycol and trimethyl glycol. Dipropylene glycol has a wide range of applications, including as a plasticizer, an industrial chemical reaction intermediate, a monomer or initiator of polymerization , and a solvent. It is the perfect addition for skin and hair care products as well as fragrances due to its low toxicity and solvent qualities. It is also a typical component of commercial fog fluid, which is used in fog machines in the entertainment sector. In fragrance applications, dipropylene glycol is used in excess of ...

URL: https://www.tsrchem.com/an-organic-chemical-compound-neopentyl-glycol.html Neopentyl glycol is an organic chemical compound with the IUPAC designation 2,2-dimethylpropane-1,3-diol. It also has other names,such as:1,3-Propanediol, 2,2-dimethyl-; Dimethylolpropane; Neopentanediol; Neopentylene glycol; 2,2-Dimethyl-1,3-propanediol; Dimethyltrimethylene glycol; Hydroxypivalyl alcohol; NPG; Neol; 1,3-Dihydroxy-2,2-dimethylpropane; 2,2-Dimethyl-1,3-dihydroxypropane; 2,2-Dimethylpropane-1,3-diol; NPG Glycol; 2,2-Dimethyltrimethylene glycol; NSC 55836. It is used to create plasticizers, paints, lubricants, and polyesters. It improves the product's resistance to heat, light, and water when employed in the production of polyesters. Synthetic lubricating esters with lower oxidation or hydrolysis potential than natural esters can be created by esterifying reactions with fatty or carboxylic acids. Neopentyl glycol has a wide range of functions. It is mainly used in...