Polybutadiene Polyols

Figure 1. Dynamic relaxation spectra (torsion pendulum, 1 Hz) of polyurethanes based on polymyrcene and polybutadiene polyols. Typical relaxation peaks are shown at the temperatures designated T/j, T and. ...

For polyols, the demand distribution in the United States in 1984 was as follows 94 per cent for polyether-polyols, less than 6 per cent for polyester-polyols, with polybutadiene-polyols accounting for less than 1 per cent of the market... 

Polybutadiene polyols 5. Polyols from renewable resources... 

Synthesis of Polybutadiene Polyols by Radical Polymerisation of Butadiene [2, 3, 5-7, 9-15]... 

One observes that the majority microstructure is 1,4 trans. The terminal hydroxyl groups are exclusively primary hydroxyl groups of the allylic type (95%). The functionality (f) of these polybutadiene polyols is in the range of 2.2 - 2.6 OH groups/mol. 

In Chapter 3, the chemistry and technology of the most important oligo-polyols used for elastic polyurethanes fabrication, in fact high MW oligomers (2000-12000 daltons) with terminal hydroxyl groups and low functionality (2-4 hydroxyl groups/mol) were discussed. Polyalkylene oxide polyols (homopolymers of PO or copolymers PO - EO, random or block copolymers), polytetrahydrofuran polyols, filled polyols (graft poly ether polyols, poly Harnstoff dispersion - polyurea dispersions (PHD) and polyisocyanate poly addition (PIPA) polyols), polybutadiene polyols and polysiloxane polyols were all discussed. The elastic polyurethanes represent around 72% of the total polyurethanes produced worldwide. 

Polynoxylin. See Urea-formaldehyde resin Polyoctadecylmethylsiloxane. SeeStearyl methicone Polyoctylmethylsiloxane. See Polymethyloctylsiloxane Polyoil, epoxidized. See Epoxidized polybutadiene Polyol, flexible Polyol, flexible, amine-terminated Polyol, rigid. See Polyether polyol... 

When the properties of H12MDI elastomers are compared with those of the analogous MDI series it is found that elastomers based on the aliphatic isocyanate generally had superior mechanical properties. This pattern of behaviour applies to both polyester, polyether, polycaprolactone and polybutadiene polyol-based urethane elastomers. 

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