1.3- Propanediol glycol

Propanediol Glycol ethers PGME None 6 650a 1.5 ... 

Temperature, °C Glycerol trinitrate Ethylene glycol dinitrate Diethjlene glycol dinitrate 1,2-Propylene glycol dinitrate 1,3-Propanediol dinitrate... 

Propylene glycol, dipropylene glycol, and tripropylene glycol all have several isomeric forms. Propylene glycol has one asymmetric carbon and thus there are two enantiomers (R)-I,2-propanediol and (3)-1,2-propanediol. 1,3-Propanediol is a stmctural isomer. Dipropylene glycol exists in three stmctural forms and since each stmctural isomer has two asymmetric carbons there are four possible stereochemical isomers per stmcture or a total of twelve isomers. These twelve consist of four enantiomer pairs and two meso- compounds. Tripropylene glycol has four stmctural isomers and each stmctural isomer has... 

Neopentyl glycol, or 2,2-dimethyl-1,3-propanediol [126-30-7] (1) is a white crystalline soHd at room temperature, soluble ia water, alcohols, ethers, ketones, and toluene but relatively iasoluble ia alkanes (1). Two primary hydroxyl groups are provided by the 1,3-diol stmcture, making this glycol highly reactive as a chemical intermediate. The gem-A methy configuration is responsible for the exceptional hydrolytic, thermal, and uv stabiUty of neopentyl glycol derivatives. 

The stmcture of individual block polymers is deterrnined by the nature of the initiator (1,2-propanediol above), the sequence of addition of propylene and ethylene oxides, and the percentage of propylene and ethylene oxides in the surfactant. Thus, when the order of addition is reversed, a different stmcture is obtained in which the hydrophobic moieties are on the outside of the molecule. With ethylene glycol as the initiator, the reactions are as foUows ... 

Glycol Titanates. Primary diols (HOGOH), such as ethylene glycol and 1,3-propanediol, react by alkoxide interchange at both ends, yielding insoluble, white soflds that are polymeric in nature (18,61—63) ... 

The addition of one mole of a diol, such as ethylene glycol, 1,2-propanediol, or 1,4-butanediol, to bis-acetylacetone titanate complexes gives a complex that is stable on dilution with water and that can be used in aqueous printing inks (509). An excellent review of the use of organic titanates in printing inks is available (510). 

Chloro-l,2-propanediol [96-24-2] HOCH2CHOHCH2CI, a liquid with = 1.4831 (6), boils at 213°C and 101.3 kPa (1 atm) with decomposition. It can be distilled at 114—120°C at 1.87 kPa (14 mm Hg). Synonyms for this compound include 3-chloro-l,2-dihydroxypropane, glycerol monochlorohydrin, a-chlorohydrin, and 3-chloropropylene glycol. It is miscible in water, ethanol, ethyl ether, and acetone [67-64-1] (8) and is soluble in hot... 

The flexibiHty of the final film is partiy controUed by the ratio of aromatic to aHphatic dibasic acids. The esters of highly substituted polyols such as neopentyl glycol (NPG) (2,2-dimethyl-l,3-propanediol) [126-30-7] 1,4-dimethylolcyclohexane (cyclohexanedimethanol (CHDM)) [27193-23-3] ... 

Diaminopropane Processes. 1,2-Propylenediamine can be produced by the reductive amination of propylene oxide (142), 1,2-propylene glycol [57-55-6] (143), or monoisopropanolamine [78-96-6] (144). 1,3-Propanediol [504-63-2] can be used to make 1,3-diaminopropane (143). Various propaneamines are produced by reducing the appropriate acrylonitrile—amine adducts (145—147). Polypropaneamines can be obtained by the oligomerization of 1,3-diaminopropane (148,149). 

Aliphatic Glycidyl Ethers. Aliphatic epoxy resins have been synthesized by glycidylation of difunctional or polyfunctional polyols such as a 1,4-butanediol, 2,2-dimethyl-l,3-propanediol (neopentyl glycol), polypropylene glycols, glycerol, trimethylolpropane, and pentaerythritol. 

Ethylene glycol 1,2-Ethanediol 95 CoHeOo 1,2-Propylene glycol 1,2-Propanediol 96 C,HsOj... 

Dimetbyl-l,3-propanediol (neopentyl glycol) [126-30-7] M 104.2, m 128.4-129.4°, b 208°/760mm. Crystd from benzene or acetone/water (1 1). 

Chemical Designations - Synonyms 1,2-Propanediol 1-acrylate Propylene glycol mono-acrylate Chemical Formula CH3CH0HCH20C0CH=CH2. 

Chemical Designations1,2-propanediol 1-methacrylate Propylene glycol monomethacrylate Chemical Formula CH3CHOHCHiOCOC(CH3)=CHj. 

In the first example, selective protection was more successful with 1,3-propanediol than with ethylene glycol. ... 

A chain extender could be selected from the following compounds ethylene glycol, 1,2-propanediol, 1,4-butanediol, 1,3-butanediol, neopentanediol, hexanediol, methyl-dihydroxylethyl amine (MDEA) [9], etc. These should be as dry as possible. 

Propylene glycol (1,2-propanediol) is produced by the hydration of propylene oxide in a manner similar to that used for ethylene oxide ... 

Due to the differences in the values relative to any one system, conclusions cannot easily be drawn from the activation parameters listed in Table 3. However, an analysis of the results relative to 1,2-ethanediol, 2,2-dimethyl-l,3-propanediol, 1,5-pentanediol, 1,10-decanediol and diethylene glycol shows that a slight difference can be observed between aromatic and aliphatic acids the activations enthalpies and entropies are in the ranges 70, 100 kJ mol"1 and -SO, -130 J K"1 mol-1 for aromatic acids, and in the ranges 50, 70 kJ mol"1 and -200, -100 J K"1 mol-1 for the aliphatic acids. 

Fig. I8a-c. Ellipticity or (Pro-Ala-Gly-Pro-Ala-Gly) (n = 1-13). (a) In water (b) in 1,1,1,3,3,3-hexafluoro-2-propanol/ethylene glycol (1 2) (c) in 1,3-propanediol, depending on the chain length under helix conditions...

Propanediol (1,2-Propylene glycol, 1,2-Dihydroxy propane, Methyl glycol). CH3.CHOH.CH2OH mw 76.09 colorl, viscous, stable, hygr liq bp 187.3°, d 1.0381g/cc at 20/20° RI 1.4293 at 27° fl pt (open cup) 210°F autoignition temp 780°F. Misc with w, ales, and many org solvents in all proportions. Can be prepd by hydration of propylene oxide. On nitration it yields the exp] 1,2-Propanediol Dinitrate (see below)... 

As early as 1904, 1,2-Propanediol Dinitrate was proposed (Ref 3) as an additive to lower the freezing temp of NG, but its practical application on a large scale was hindered by lack of the raw material, propane-1,2-diol. It is only recently that the synthesis of glycol from ethylene led to the development of a method for producing methyl glycol from propylene via cnioro-hydrin. Even so, propylene-1,2-glycol is somewhat more expensive than glycols derived from ethylene (Ref 9)... 

Note A mixt consisting chiefly of 1,2-Propanediol Dinitrate, but contg varying amts of ethylene glycol dinitrate and butylene glycol dinitrate was marketed under the trade name Nitro-byronel (Ref 8)... 

Propanediol (Trimethylene glycol, 1,3-Di-hydroxypropane). CH2OH.CH2.CH2OH mw 76.09 color to pale yel, very vise, sweet liq mp, freezes in a mixt of dry ice and eth bp... 

Ethylene glycol ethanediol dihydroxyethane Propylene glycol propanediol dihydroxypropane Butylene glycol butanediol dihydroxybutane... 

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