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Names | |
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Other names Polyoxypropylene diglycidyl ether; PPGDGE | |
Identifiers | |
ECHA InfoCard | 100.130.913 |
CompTox Dashboard (EPA) | |
Properties | |
(C3H6O)n.C6H10O3 | |
Molar mass | Variable |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Poly(propylene glycol) diglycidyl ether (PPGDGE) is an organic chemical in the glycidyl ether family. There are a number of variations depending on the starting molecular weight of the polypropylene glycol. [1] They have the formula (C3H6O)n.C6H10O3 [2] and the IUPAC name is Poly[oxy(methyl-1,2-ethanediyl)],a-(2-oxiranylmethyl)-w-(2-oxiranylmethoxy)- [3] A key use is as a modifier for epoxy resins as a reactive diluent and flexibilizer. [4] [5] It is REACH registered. [6]
The product is made by taking polypropylene glycol and epichlorohydrin and reacting in the presence of a Lewis acid catalyst to form a halohydrin. The next step is dehydrochlorination with sodium hydroxide. This forms the diglycidyl ether. Waste products are sodium chloride, water and excess sodium hydroxide (alkaline brine). [7] [8] One of the quality control tests would involve measuring the epoxy value by determination of the epoxy equivalent weight.
The molecule has 2 oxirane functionalities, and so a key use is modifying and reducing the viscosity of epoxy resins. [9] [10] These reactive diluent modified epoxy resins may then be further formulated into CASE applications: coatings, [11] adhesives, sealants, and elastomers. It produces epoxy coatings with high impact resistance. [12] The use of the diluent does effect mechanical properties and microstructure of epoxy resins. [13]
Synthesis of waterborne polymers has been a feature with this substance. As the basic building block is propylene oxide, there are 3 carbons per oxygen on the backbone. This confers some degree of water miscibility though not as good as ethylene oxide based molecules. [14] [15]
The material maybe used to produce polymers with shape memory and good thermomechanical properties. [16] In addition, the molecule is used to synthesize other molecules. [17] [18] [19] [20] [21]
The toxicology of the material is reasonably well known. [22]
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