Polypropylene ether

After 8 h of reaction, the reactor was allowed to cool. A two-layer liquid formed. The top layer was found to contain mostly polypropylene ether triols with about 20% by weight diethylene glycol and 5% by weight toluene diamines. The top layer was purified by vacuum distillation at 2 mm Hg and 200° C to produce 320 g of a light brown liquid residue. This residue (polyols) was used as a replacement for 5% by weight of the Pluracol 535 polyol in the formulation of a flexible polyurethane foam. A flexible foam which had good resiliency and a density of 2.2 Ib/ft3 was obtained. At higher replacement levels, lesser quality foams were obtained. 

A 3000 molecular weight polypropylene ether) triol (Arcol F3020, 90 g) was mixed with maleic anhydride (60 g) and zinc chloride (2.25 g) in a three-necked round-bottomed flask equipped with a magnetic stirrer, a condensor and a thermometer. Under a nitrogen atmosphere, the reaction mixture was heated to 190 °C... 

Polypropylene ether) polyol is the single most important product from propylene oxide and enjoys a predominant position in polyurethane applications. The ether linkages are very abundant in these polyols and they contribute to the physical and chemical properties in many applications such as surfactant action and hydrogen-bond formation. 

The same methods employed with raw polymers were used for fractions of isotactic polypropylene (ether extraction residue), containing also some stereoblock polymers 32). 

Preparation of biodegradable salts derived from the reaction product of polypropylene ether amines and bis(perfluorobutylsulfonyl)-imine for use as antistatic agents. 

TABLE 1. Selected Polypropylene Ether Ammonium Salts Prepared Using Jeffamine Polyether Amines and Bis(perfluoroalkylsulfonyl)imine... 

Figure 7. Time-conversion plot for 1,5-pentanediol initiated preparation of polypropylene ether) diol in pentane (propylene oxide/pentane wt ratio = 3) with Zns[Co(CN)6]2 glyme ...

Figure 9. Unsaturation vs. molecular weight for polypropylene ether) polyols made with Zns[Co(CN)6]2 glyme ZnCh and made commercially...

Prepolymers based on polypropylene ether glycol (PPG) have excellent but not as good mechanical and wear properties as the PTMEG-based materials. Improvements to the performance of the PPG material were made by the end-capping of the propylene glycol chains with ethylene oxide. The modified PPG gave better processing and performance. 

Catalysts derived from reaction systems such as triethylaluminium-water and triethylaluminium-water-acetylacetone [225], triethylaluminium-triphe-nylphosphine [226], triethylaluminium-pyrogallol [209] and rare-earth metal phosphonate- triisobutylaluminium-glycerol [227] appeared to be effective in the copolymerisation of propylene oxide and carbon dioxide, yielding high molecular weight polypropylene ether-carbonate)s (Table 9.4) but not the respective alternating copolymer which is polypropylene carbonate). 

Copolymer of adipic acid and ethylene and propylene glycols, cross-linked by naphthalene 1,4-diisocyanate and 1,4-butanediol. m Polypropylene ether) cross-linked by toluene diisocyanate and trimethylol propane. n Data by Te Nijenhuis (1974, 1979). 

Baycoll BT-1380 Bayer (Germany) 50 Branched polypropylene ether triol... 

Baycoll BD-1110 Bayer 50 Linear polypropylene ether diol... 

Figure 3.85 Stress vs. strain at various temperatures for SABIC Innovative Plastics Noryl 731— general purpose, UL94 HB rated, polypropylene ether, and PS blend resin.

GFN1—10% giass fiber reinforced, polypropylene ether, and PS blend resin. 

Figure 3.91 Flexural modulus vs. temperature for Mitsubishi Engineering-Plastics Iupiace polypropylene ether and PS blend resins.

Figure 3.96 Tensile modulus vs. temperature for SABIC Innovative Plastics Noryl GTX polypropylene ether, PS, and polyamide blend resins.

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