Kinetic features of the catalytic reaction of isophorone diisocyanate with triethylammonium salt of 2,2‐bis(hydroxymethyl)propionic acid, a hydrophilic agent for obtaining waterborne polyurethane, also with the model 1,1‐bis(hydroxymethyl)ethane and with physical mixture 1,1‐bis(hydroxymethyl)ethane‐triethylamine were studied using IR spectroscopy. The observed rate constant ratios of isophorone diisocyanate aliphatic and cycloaliphatic isocyanate groups interaction with the studied compounds were established, and the catalysis efficiency was evaluated. It was shown that a synergic effect is observed in catalytic systems based on dibutyltin dilaurate and triethylammonium carboxylates with regard to the reactivity of isophorone diisocyanate aliphatic group alone in the urethane formation reaction.

New complex based on cobalt (II) acrylate and 4′-phenyl-2,2′:6′,2″-terpyridine (PhTpy) was synthesized and characterized using a number of analytical techniques including IR and UV- vis spectroscopy, elemental, X-Ray and TGA/DSC analysis. The complex has high thermal stability and crystallinity. It is found that decomposition of the complex is accompanied by thermal polymerization of acrylic fragments that is a potential way for the preparation nanoparticles of metals or their oxides stabilized by the polymer matrix.

This study comprehensively investigates the efficiency of the formulation of tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTES) copolymer in sol-gel syntheses as part of a multivariate experiment. A methodology-based response surface was...

Investigation of isophorone diisocyanate oligoisocyanurate effect on water dispersible polyurethane properties Oligoisocyanurates (OIC) are the products of various diisocyanates cyclotrimerization reaction, with their functionality being more than three (potential crosslinking agents). They are applicable in chemical polymer industry as an additive to diisocyanates for polyurethane coatings obtaining with various properties, as well as an isocyanate-containing component on its own for polyurethane synthesis. The OIC-based polymers possess a number of unique properties, e.g. improved thermal stability, fire resistance, UV resistance, also they are not expected to undergo hydrolysis. We studied the effect of isophorone diisocyanate oligoisocyanurate content on hydrodynamic, thermo-mechanical and thermal properties of resulting water dispersible polyurethanes. Samples of water dispersible polyurethanes containing isophorone diisocyanate (IPDI), poly (butylene adipate) (PBA) and 2,2-dimethylolpropionic acid (DMPA) were prepared following acetone method for this purpose, with IPDI OIC amount being 10-30 wt.% per pure IPDI. IPDI OIC was partially blocked with morpholine to exclude crosslinking in WDPU synthesis. Dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and dynamic light scattering (DLS) were used to characterize the polymers obtained. It was established that oligoisocyanurates improve the characteristics of both water dispersible polyurethanes and their polymer films. Moreover, oligoisocyanurates prevent polyurethane coatings crystallization due to its branched structure, which without a doubt will affect their performance positively.

The present paper is aimed to investigate the effect of modifiers, such as poly (phenylene sulfone) and poly (aril ether ketone), on physico-mechanical and thermophysical properties of heat-resistant epoxy-anhydride binder based on EHD epoxy resin. It was found that the addition of poly (phenylene sulfone) and poly (aril ether ketone) can improve mechanical and impact strength characteristics of the binder with no reduction in heat resistance and thermal stability.