DIPROPYLENE GLYCOL DIMETHYL ETHER

EC Number: 404-640-5 

Molar Mass: 162.2 g/mol

Molecular formula C₇H₁₆O₃

Physical state: liquid (fluid) 

Colour: colourless Odour like ether

Melting point/freezing point: -75 °C

Boiling point, initial boiling point and boiling range 171 °C

Flash point: 65 °C

Dipropylene glycol dimethyl ether uses cleaners, textiles, cosmetics, resins, coating formulation,  and application, industrial, automotive and architectural coatings.Dipropylene glycol dimethyl ether’s benefit s; favorable enviornmental profile, superior performance for end use applications, formulations may require less Performance solvent than P or E Series. Dipropylene Glycol Dimethyl Ether is unique among propylene oxide-based solvents in that it is aprotic (no hydroxyl functionality). As a result, it is relatively inert and can be used in protonsensitive systems such as water-based polyurethane coatings. 

Dipropylene Glycol Dimethyl Ether can also be used as an azeotroping solvent for esterification reactions. And with its excellent stability, solvency, and coupling performance, Dipropylene Glycol Dimethyl Ether provides excellent compatibility with a wide range of agricultural formulations and cleaning products. Dipropylene glycol dimethyl ether is an inert solvent and well suited as a non-toxic alternative to NMP and NEP in paints & coatings applications, especially for waterborne PU-dispersions and 2P-formulations.Solvent blends based on dipropylene glycol dimethyl ether (DPGDME) and non-HAP hydrocarbons were evaluated as xylene replacements for the preparation of alkyd and polyester resins by the solvent reflux process. Screening criteria included water partitioning properties, autoignition temperature, distillation profile, and water removal efficiency. A series of resins was also prepared by an identical procedure in order to compare the performance of the DPGDME solvent blends with that of the xylene control.

Several of the DPGDME/hydrocarbon blends exhibited desirable partitioning properties and autoignition temperatures >350°C.These blends were close-boiling and when distilled in the presence of water, formed minimum boiling pseudo-heterogeneous azeotropes containing about 50% water. Size exclusion chromatography data showed that resins made with the DPGDME blends had essentially the same molecular weight distribution profile as those made with xylene.

Dipropylene Glycol Dimethyl Ether (DPGDME) is a colorless liquid with a mild, pleasant odor. It is completely miscible with most common organic solvents. However, dipropylene glycol dimethyl ether  has limited solubility in water. Dipropylene glycol dimethyl ether  has no hydroxyl functionality. It is an inert, aprotic solvent and can be used in proton sensitive systems.  Dipropylene Glycol Dimethyl Ether is not listed as a Hazardous Air Pollutant, has low toxicity, and offers an alternative to solvents being phased out as a result of the Clean Air Act. Due to its chemical stability and the absence of reactive groups, dipropylene glycol dimethyl ether  can also be used as an inert reaction medium, e. g. for reactions with alkali and alkaline-earth metals (Grignard reactions), polymerizations etc.Dipropylene Glycol Dimethyl Ether is used in solvent-based coatings and water-based polyurethane/ isocyanate coating systems. It is used as environmentally friendly substitute for NMP (N-methyl pyrrolidone) e.g as as coalescing agent in water based polyurethane dispersions. Dipropylene glycol dimethyl ether is also used as a solvent for wood and furniture coatings as well as a solvent for hardeners.

Dipropylene glycol dimethyl ether is completely miscible with most common organic solvents and has limited solubility in water. Dipropylene glycol dimethyl ether forms an azeotrope with water (38% Dipropylene glycol DME and 62% water). Dipropylene glycol dimethyl ether is used as an environmentally friendly replacement for NMP (N-methyl pyrrolidone). Suitable for water-based and solvent-based coating systems.

Dipropylene glycol dimethyl ether is designed for use as a coalescing agent or as solvent for polyurethane/isocyanate prepolymer in 2c-PUDs. Dipropylene glycol dimethyl ether can also be used in effective paint and varnish-stripping formulations by combining it with a protic solvent and as a co-solvent in aluminum pastes.The invention relates to a method of purifying dipropylene glycol dimethyl ether. The method includes: using a crude dipropylene glycol monomethyl ether product as a raw material; enabling the crude dipropylene glycol monomethyl ether product and excessive mixed aldehyde waste liquid to be in aldolization under catalysis action of sulfuric acid, and enabling propylene glycol in the crude product to be in reaction to generate a cyclic acetal structure; performing negative pressure rectification after the reaction is finished, and respectively collecting solutions after rectification according to difference in ingredients. The method has the advantages that the crude dipropylene glycol monomethyl ether product of propylene glycol ether production enterprises is adopted as the raw material; through the method, product quality can be improved greatly, and producing of a high-quality product is ensured; dipropylene glycol monomethyl ether can be purified to form environment-friendly solvents like high-purity dipropylene glycol monomethyl ether urgently needed by downstream enterprises of waterborne latex, plasticizers, coatings, printing ink and cleaning agents.

For analytes such as dipropylene glycol dimethyl ether, which are comprised as mixtures of related compounds, quantitation is accomplished by summing the peak areas of each component and treating the summed areas as one analyte. This is an accepted and convenient practice when using a flame ionization detector because the responses for all of the isomers of dipropylene glycol dimethyl ether are identical. But if the desorption efficiencies are not the same for each isomer, they must be quantitated separately with individual desorption efficiency corrections, and then the resulting amounts are summed to determine the total amount of dipropylene glycol dimethyl ether. This procedure is necessary for any method using charcoal collection and carbon disulfide desorption because the relative proportion of isomers in dipropylene glycol dimethyl ether can vary by lot and manufacturer. Because charcoal will always collect some water from sampled air, the desorption of dipropylene glycol dimethyl ether from wet charcoal is an important consideration as evidenced by evaluations done at SLTC for other chemically similar analytes.

Dipropylene glycol dimethyl ether  is a clear, colorless, combustible liquid with a slight ether odor. It is completely soluble in water, and has moderate volatility. 

Precautionary statements-(Prevention)
•Washface,handsandanyexposedskinthoroughlyafterhandling
•Keepawayfromheat/sparks/openflames/hotsurfaces.— Nosmoking
•Wearprotectivegloves/protectiveclothing/eyeprotection/faceprotection

Inhalation

Remove to fresh air. If symptoms persist, call a physician.

Skin contact: Wash off immediately with soap and plenty of water. If symptoms persist, call a physician. Eye contact

IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue
rinsing. Immediate medical attention is required.

Ingestion

Rinse mouth. Never give anything by mouth to an unconscious person. Call a physician or poison control center
immediately. Do not induce vomiting without medical advice. Protection of first-aiders

Use personal protective equipment as required.Avoid contact with high temperature objects, spark, and strong oxidizing agents. Use with local exhaust ventilation.Do not rough handling containers, such as upsetting, falling, giving a shock, and dragging. Prevent leakage, overflow, andscattering. Not to generate steam and dust in vain. Seal the container after use. After handling, wash hands and face, and then gargle. In places other than those specified, should not be smoking or eating and drinking. This product, as supplied, does not contain any hazardous materials with occupational exposure limits established by the region specific regulatory bodies.

Dipropylene Glycol Dimethyl Ether is a colorless liquid with a mild, pleasant odor. It is completely miscible with most common organic solvents. However, it has limited solubility in water. DPGDME has no hydroxyl functionality. It is an inert, aprotic solvent and can be used in proton sensitive systems. Dipropylene Glycol Dimethyl Ether is not listed as a Hazardous Air Pollutant, has low toxicity, and offers an alternative to solvents being phased out as a result of the Clean Air Act. Due to its chemical stability and the absence of reactive groups, DPGDME can also be used as an inert reaction medium, e. g. for reactions with alkali and alkaline-earth metals (Grignard reactions), polymerizations etc.

Dipropylene Glycol Dimethyl Ether is used in solvent-based coatings and water-based polyurethane/ isocyanate coating systems. It is used as environmentally friendly substitute for NMP (N-methyl pyrrolidone) e.g as as coalescing agent in water based polyurethane dispersions. Dipropylene glycol dimethyl ether is also used as a solvent for wood and furniture coatings as well as a solvent for hardeners.Dipropylene glycol diMethyl ether can be used as aprotic solvent for use on proton-sensitive systems such as water-based polyurethane coatings.

Dipropylene glycol diMethyl ether can be used as aprotic solvent for use on proton-sensitive systems such as water-based polyurethane coatings.Dipropylene glycol diMethyl ether can be used as aprotic solvent for use on proton-sensitive systems such as water-based polyurethane coatings.propylene glycol dimethyl ether is a multipurpose environmental friendly solvent, usually used in water and cure coatings. In addition, it also can be used for synthesis of polyurethane, etc. ore broadly, its hydrophilic nature makes it an ideal coupling aid in water reducible coatings, and cleaning applications. Used with cleaners because they offer an extensive combination of basic physical and performance properties for cleaning formulations.

The intermediate evaporation rate allow it to be used in a potentially wider range of systems than many other solvents. One of its main commercial uses is as a solvent for paints, varnishes, inks, strippers, and degreasers.  It is also utilised as a coalescing agent for water-based paints and inks where it promotes polymer fusing during the drying process.  It is also a component of wood and coil coatings, as well as coatings used in the automotive industry, industrial maintainence, and metal finishing.  It is also a component of hydraulic fluids and industrial degreasers and is a chemical additive in the oil production and drilling industry.

This is due to its reaction with acids, forming esters and oxidising agents which produce aldehydes, carboxylic acids and alkali metals therefore creating alcoholates and acetals.It is found in ceiling and wall paints and in many common cleaners including glass and surface cleaners, paint-brush cleaners, all-purpose cleaners, carpet cleaners and disinfectant cleaners.  It is also found in cosmetics where it provides emollient properties and product stabilisation as well as floor and aluminium polish, leather and textile dyes, rust removers and pesticides where it acts as a stabiliser.