Serbian researchers synthesized novel biobased poly(ester-urethane)s (PUDs) by solvent free homogeneous solution polymerization of poly(caprolactone) diol (PCL), castor oil-based polyols (COLs), dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI) and 1,4-butane diol (BD) as the chain extender. The polyurethane dispersions were prepared by adding required amount of triethylamine (TEA) and water. In this work, castor oil-based polyols have been synthesized using the depolymerized oligoester obtained from glycolysis of PET waste … Continue reading Biobased Waterborne Polyurethanes: PET Waste and Poly(caprolactone) Diol

Slovenian researches synthesized nanocellulose modified acrylic microspheres by suspension polymerization.  In the first stage α cellulose was modified by acid hydrolysis and the produced nanocellulose suspension was added into the continuous phase of a suspension polymerization reaction mixture. The amount of nanocellulose varied in range from 0 wt% (reference synthesis) to 5 wt% calculated on monomer amount.hen, adhesives were coated via a transfer coating process and adhesive … Continue reading Novel Acrylic/Nanocellulose Microspheres as Pressure Sensitive Adhesives

In recent study, waste fly ash, a by-product from coal power stations was converted into zeolite NaY for its successful utilization as an anticorrosive pigment in paints.The synthesized zeolite NaY was modified by exchanging its nominal cation Na+1 with Mo+1 ion. The Mo+1 exchanged zeolite was used as an anticorrosive pigment in coatings. Coatings were formulated using various percentages of the synthesized pigment in epoxy resin. … Continue reading Fly Ash Based Zeolite as an Anti-corrosive Pigment in Paints

The synergistic effect of a nitrogen and phosphorus containing reactive monomer on the flame retardancy of photocured epoxy acrylate based coatings was investigated.The incorporation of allyl phosphinic amide into an epoxy acrylate decreased the gel contents and the double bond conversions. Mechanical properties were significantly affected from the degree of cure. Tensile strength of the coatings decreased as the amount of the monofunctional allyl phosphinic amide … Continue reading Flame retardancy of photocured epoxy acrylate based coatings

Hyperbranched epoxy resin (TAE) was synthesized by a simple polycondensation reaction using bio-based tannic acid as a branch generating moiety. The nanocomposites of TAE with different doses (0.25, 0.5, and 1 wt.%) of reduced graphene oxide (RGO) were prepared by solution technique. TAE was cured with poly (amido-amine) hardener at a temperature of 100 °C followed by post curing at 120 °C. FTIR, 1H NMR, 13C NMR etc. … Continue reading Tannic acid based hyperbranched epoxy/reduced graphene oxide nanocomposites as surface coating materials

Hemp concrete is becoming a popular building construction material, as it has a low environmental impact and helps reducing the heat conductivity of walls. The generally used binder is lime, but in this study a prompt natural cement binder was used. The objective of this study was to analyse the behaviour of a hempcrete wall in realistic conditions. 2 test walls made of prefabricated hemp … Continue reading Study of a hempcrete wall exposed to outdoor climate: Effects of the coating

Hydrophobic epoxy coatings with particulated surfaces were prepared via soft lithography using different abrasive papers as the templates. With the increasing surface roughness, the hydrophobicity of these surfaces first increased and then decreased and a maximum water contact angle of ∼136° was obtained by using a P2000 abrasive paper as the template. Electrochemical impedance spectroscopy (EIS) was used to study the role of surface morphology … Continue reading The role of surface morphology in the barrier properties of epoxy coatings in different corrosion environments

Cardanol based reactive polyamides having different molecular weights were successfully developed by conventional polycondensation mechanism. The synthesis involved 2-step processes of functionalization of cardanol by maleic anhydride followed by its condensation with diethylenetriamine (DETA) in the 2nd step. The polyamides with different molecular weights were prepared by varying the mole ratios of acid and amine components in the formulation. The developed polyamides were characterized for … Continue reading Cardanol based reactive polyamide for epoxy coating application

Biobased polyurethane networks were prepared by a one step curing epoxidized rapeseed oil (ERO) with isophorone diisocyanate (IPDI) as a hardener at 130 °C. The in-situ monitoring of the curing process by FTIR has confirmed the progressive consumption of the oxirane ring and the isocyanate function along with the emergence of the urethane groups. Investigation of model systems using phenyl isocyanate confirmed the ring opening of … Continue reading A one step route synthesis of polyurethane network from epoxidized rapeseed oil