Polypropylene triol

Another formulation of Toback and O Connor employs hydroxypropyl methacrylate as the fluidizing reactive component of a modified acrylic engineering adhesive. A condensation product of three moles of hydroxy-ethyl methacrylate, three moles of toluene diisocyanate, and one mole of a polypropylene triol provides a rubber phase. 

Boric acid esters provide for thermal stabilization of low-pressure polyethylene to a variable degree (Table 7). The difference in efficiency derives from the nature of polyester. Boric acid esters of aliphatic diols and triols are less efficient than the aromatic ones. Among polyesters of aromatic diols and triols, polyesters of boric acid and pyrocatechol exhibit the highest efficiency. Boric acid polyesters provide inhibition of polyethylene thermal destruction following the radical-chain mechanism, are unsuitable for inhibition of polystyrene depolymerization following the molecular pattern and have little effect as inhibitors of polypropylene thermal destruction following the hydrogen-transfer mechanism. 

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. 

The equilibrium shear modulus of two similar polyurethane elastomers is shown to depend on both the concentration of elastically active chains, vc, and topological interactions between such chains (trapped entanglements). The elastomers were carefully prepared in different ways from the same amounts of toluene-2,4-diisocyanate, a polypropylene oxide) (PPO) triol, a dihydroxy-terminated PPO, and a monohydroxy PPO in small amount. Provided the network junctions do not fluctuate significantly, the modulus of both elastomers can be expressed as c( 1 + ve/vc)RT, the average value of vth>c being 0.61. The quantity vc equals TeG ax/RT, where TeG ax is the contribution of the topological interactions to the modulus. Both vc and Te were calculated from the sol fraction and the initial formulation. Discussed briefly is the dependence of the ultimate tensile properties on extension rate. 

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... 

According to a report presented by Fu et al. [180], the influence of POSS-triol on epoxy-amine reaction depends mostly on the magnitude of AT (Tg -Tc) used. Since Tg for epoxy cured with linear aliphatic diamine—2-methyl-1,5-pentadiamine (MPDA)—was higher than the Tg of the same epoxy cured with diamine-terminated polypropylene oxide (PPO), when cured at the same temperature, epoxy-cured MPDA showed a greater improvement in the value of Tg. Moreover, the addition of POSS-triol in tetraglycidyl diamino diphenyl methane (TGDDM) cured with MPDA also increased the rubbery plateau modulus (Fig. 6). 

IPDI-based prepolymer. This is an aliphatic prepolymer formed by the reaction of IPDI with polyether polyol (3000 molecular weight PPO-based triol) (PPG = polypropylene oxide). The NCO group content of such systems is about 3.4%, and the viscosity about 15 000 CP at 20°C. Solid content is typically 98%-100%. The general reaction is given in Figure 2.22. This prepolymer may typically be used in two-part elastomer systems. 

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

However, chain transfer to monomer will still broaden the molecular weight distribution and prevent molecular weight control even when reversible chain transfer among growing species occurs. This rapid and reversible chain transfer is used to prepare branched polypropylene oxide polymers. Initiation of propylene oxide polymerization with an alkali metal alkoxide and a triol such as glycerol will produce the corresponding polypropylene oxide with an average functionality of 3. 

To further advance the knowledge on swelling of these systems, a study was conducted using elastomers with a limited phase separation. Polyurethanes were made by a two-step process. Polybutadiene diol (M. 2500) polytetramethylene oxide diol (M. 1400 and 2100) were used. Prepolymers were prepared by reaction of one mole of diol and two moles of 2,4-tolnene diisocyanate. Polypropylene glycol triol, Laprol 373 (M. 370) was... 

As stated, tertiary amines catalyze both the hydroxyl/isocyanate and the water/isocyanate reactions. One-shot foams utilizing primary hydroxyl-terminated polyesters as well as all types of prepolymer foams require tertiary amine catalysis only. Polypropylene ether one-shot foam formulations based on triols, in part, because of their low viscosity (about 300 cP versus 10000-30000 cP for polyesters or prepolymers) require the use of tertiary amine-metal catalyst combinations, even if the percentage of primary hydroxyl groups in the polyether is increased by capping with ethylene oxide. This is because of the relatively low polypropylene glycol activity. 

Polyether polyols are usually preferred as the hydroxyl-rich components of urethane sealants. These are normally polypropylene oxide condensates with molecular weights in the 400-4000 range, hydroxyl-terminated. Triols are incorporated in minor proportion to provide for crosslinking. Compared to polyesters, polyether urethanes have superior hydrolytic stability, lower moduli, but somewhat inferior adhesion. 

Prcpolymer (3% unreacted isocyanate) Polypropylene glycol diol (EW = 1000) Polypropylene glycol triol (EW = 1600) Toluene diisocyanate Dibutyl tin dilaurate... 

Synonyms Polyether polyol, flexible Polyether polyol, flexible, amine-terminated Polyether polyol, rigid Polyol, flexible Polyol, flexible, amine-terminated Polyol, rigid Polyoxypropyleneamine Polyoxypropylene triol Polypropylene ether polyol Polypropylene polyether polyol... 

Polyoxyl 20 stearate. See PEG-20 stearate Polyoxyl 40 stearate. See PEG-40 stearate Polyoxyl 50 stearate. See PEG-50 stearate Polyoxyl 55 stearate. See PEG-55 stearate Polyoxymethylene glycols. See Formaldehyde Poly [oxy(methylsilylene)]. See Methicone Polyoxypropylene (9). See PPG-9 Polyoxypropylene (12). See PPG-12 Polyoxypropylene (17). See PPG-17 Polyoxypropylene (20). See PPG-20 Polyoxypropylene (26). See PPG-26 Polyoxypropylene (30). See PPG-30 Polyoxypropylene (34). See PPG-34 Polyoxypropylene (40). See PPG-40 Polyoxypropyleneamine. See Polyether polyol Polyoxypropylene (3) methyl ether. See PPG-3 methyl ether Polyoxypropylene/polyoxyethylene block polymer Polyoxypropylenefpolyoxy-ethylene copolymer. See EOfPO block polymer or copolymer Polyoxypropylene triol. See Polyether polyol Polyphosphoric acid, ammonium saH. See Ammonium polyphosphate Polyphosphoric acids, compds. with triethanolamine Polyphosphoric acids, esters with triethanolamine. See TEA-polyphosphate Polyphosphoric acid sodium saH. See Sodium polyphosphate Polyphosphoric acids, potassium saHs. See Potassium polyphosphate Polyphosphoric acids, sodium salts. See Sodium polyphosphate Polyphosphoric acid, triethanolamine ester. See TEA-polyphosphate Polypropene. See Polypropylene Polypropylene CAS 90034)7-0... 

MSOPB MSOPB/G Thomil G Tilol GCT-R Tilol GP-0 Triacetina Triol 91 Trioleina dispersant, adhesion promoters A-C 573P A-C 575P A-C 597P A-C 950P A-C 1089 Polypropylene... 

PPO PE - polypropylene oxide based polyether triol with molecular mass of 260 or 1000 g/mole SDPPO sucrose, diethanol amine and propylene oxide based polyols with molecular mass of 530 or 800 g/mole. 

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