Adipic acid polyesters

Where hydrolytic attack is severe, another polymer, Urepan 601, can be used with advantage. Urepan 601 is essentially similar to Urepan 600 except that a more hydrolysis-resistant polyester, a hexanediol-adipic acid polyester, is used as the backbone polymer. Apart from this improved resistance to water, the polyester in Urepan 601 crystallizes more readily, with the result that compounds exhibit higher tensile strength properties. On the other hand, this increased tendency to crystallize impairs the low-temperature behaviour and raises the glass transition point from a value of — ITC for Urepan 600 compounds to — 23°C. 

A comparison of the yield stress as a function of temperature for different flexibilized epoxy resin systems is given in Fig. 6. The crystalline EP exhibit lower yield stresses than the conventional flexibilized EP. The crystalline system, based on sebacic acid even shows ductile behaviour at -80 C, whereas the adipic acid system reaches its critical yield stress limit at -70°C, and brittle failure at lower temperatures is found. Measurements of Hartwig also showed brittle fracture at cryogenic temperatures. But there also seems to be no evidence of ductile behaviour in the case of the sebacic acid polyester segments. The lowest yield stress at -100°C is exhibited by the rubberlike polymer based on sebacic acid polyester. Here too, the adipic acid polyester shows higher yield stresses, but achieves ductile behaviour at -100°C. The more rapid increase in yield stress is due to the absence of crystallinity. These results show that good low temperature flexibility may be... 

A 197 Adipic acid, polyester with 2,2-bis(chloromethyl)-l,3-propanediol A 198 —, polyester with 2-(bromomethyl)-2-(chloromethyl)-l,3-propanediol... 

Kaduji and Rees [10] and others [11] employed direct injection enthalpimetry to determine the hydroxy value of glycerol-alkylene oxide polyethers and butane-1,4-diol-adipic acid polyesters. 

Diels-Alder reactions, 138, 139, 145 MA radical polymerization, 244 Adipic acid, polyesters use, 480, 481, 493 Addition polymerization, MA use, 239 Aerosol surfactants, dialkyl sulfosuccinates, 53 Alanine, / and d, SMA resin reaction, 430... 

Method 3.2 Determination of Hydroxyl Number of Glycerol-Alkylene Oxide Polyethers and Butane, 1,4-Diol Adipic Acid Polyesters. Direct Injection Enthalpimetry [9]... 

METHOD 58 - DETERMINATION OF HYDROXYL NUMBER OF GLYCEROL-ALKYLENE OXIDE POLYETHERS AND BUTANE, 1,4-DIOL ADIPIC ACID POLYESTERS. DIRECT INJECTION ENTHALPIMETRY. ... 

Polyurethane from butane diol, phenylphosphonic dichloiide, and methylene bis-(4-phenyl isocyanate) Polyester urethane from an ethylene/ propylene glycol/adipic acid polyester, butane diol and methyl bis-(4-phenyl isocyanate)... 

Common name adipic acid polyester based on 1,2-propanediol ... 

Common synonyms 1,4-butanediol, propylene glycol, adipic acid polyester, 2-ethylhexanol-terminat-ed ... 

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