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Glycol formal

The copolymerization between trioxane and suitable comonomers (ethylene oxide, 1,3-dioxolane, diethylene glycol formal, 1,4-butane diol formal in amounts of 2-5% by weight) is performed using cationic initiators. The cationic initiators could be Lewis acids, such as BF3 or its etherate BF3Bu20 which was used, for example by Celanese (the mechanism of this reaction was studied in detail [163,164]) or protic acids such as perchloric acid, perfluoroalkane sulfonic acids and their esters and anhydrides. Heteropoly acids were used and also a series of carbenium, oxocarbenium salts, onium compounds, and metal chelates. To regulate the molecular weight chain-transfer agents, such as methylal and butylal, are added. [Pg.728]

Fig. 3.5. Time-conversion curve for the consumption of monomer (Mt), formation of polymer (P) and formation of cyclic dimer (M2) during the polymerization of triethylene glycol formal (0.5 mol 1 1... Fig. 3.5. Time-conversion curve for the consumption of monomer (Mt), formation of polymer (P) and formation of cyclic dimer (M2) during the polymerization of triethylene glycol formal (0.5 mol 1 1...
More recently cyclic acetal-styrene systems were reinvestigated by the GPC technique 154,155). Using double detection (UV and RI), Yamashita et al. showed that products of copolymerization of styrene with tri- and tetraethylene glycol formals have a unimodal molecular weight distribution, and that the maxima of both RI and UV traces coincide indicating that the products are true copolymers. [Pg.134]

Synonyms 1,3-dioxacyclopentane ethylene glycol formal formal glycol... [Pg.494]

Benzene, carbon disulfide, cyclohexane, cyclohexanone, dimethyl phthalate, dioxane, ethyl acetate, ethylbenzene, glycol formal, methyl ethyl ketone, 1-nitropropane, phosphorus trichloride, tetrahydrofuran, tributyl phosphate... [Pg.829]

Synonyms Dihydro-1,3-dioxole 1,3-Dioxacyclopentane 1,3-Dioxolan Dioxolane Ethylene glycol formal Formal glycol Glycoformal Glycol formal Glycol methylene ether Classification Sat. cyclic aliphatic ether Empirical C3H6O2... [Pg.1492]

Glycol formal. See 1,3-Dioxolane Glycol hydroxystearate CAS 33907-46-9 EINECS/ELINCS 251-732-4 Synonyms Ethylene glycol monohydroxystearate Glycol monohydroxystearate 2-Hydroxyethyl hydroxyoctadecanoate Hydroxyoctadecanoic acid, 2-hydroxyethyl ester Definition Ester of ethylene glycol and hydroxystearic acid Empirical C20H40O4... [Pg.1936]

Figure 9. Monomer concentration at equilibrium in the polymerization of triethylene glycol formal /3/... Figure 9. Monomer concentration at equilibrium in the polymerization of triethylene glycol formal /3/...
Figfire 10. HP-GPC curves of the reaction mixture during the polymerization of the dimer of triethylene glycol formal (M,)... [Pg.91]

Acetone, butanol, bzn., chloroform, cyclohexanone, dichloroethane, dioxane, glycol formal, methyl acetate, methylr clohexanone, THE... [Pg.2005]

Accortliiig to Seymour the plithalate ester of diethylene glycol formal is useful as a plasticizer for cellulose derivati es. This formal is prepared by condensing two niols of diethylene glycol with one mol of paraformalde-hj de in the presence of sulfuric acid. [Pg.360]

See other pages where Glycol formal is mentioned: [Pg.9]    [Pg.491]    [Pg.491]    [Pg.491]    [Pg.491]    [Pg.564]    [Pg.564]    [Pg.1706]    [Pg.461]    [Pg.9]    [Pg.44]    [Pg.297]    [Pg.942]    [Pg.976]    [Pg.186]    [Pg.278]    [Pg.936]    [Pg.85]    [Pg.87]    [Pg.94]    [Pg.95]    [Pg.187]    [Pg.2122]    [Pg.2142]    [Pg.1983]    [Pg.359]   


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