Synthesis of Polyurethane/Silica Modified Epoxy Polymer Based on 1,3-Propanediol for Coating Application

Abstract

Synthesis of polyurethane/silica modified epoxy polymer using 1, 3-propanediol ABSTRAK Polimer epoksi termodifikasi poliuretan/silica telah disintesis dengan menggunakan bahan dasar 1,3-propanadiol. Sintesis dilakukan dengan mereaksikan senyawa tolonat dan 1,3-propanadiol (rasio berat NCO/OH = 2,5/1) sebagai bahan penyusun poliuretan dengan epoksi diglisidil eter bisfenol A (DGEBA) disertai penambahan katalis dibutiltin dilaurat (DBTL), dimana penambahan poliuretan sebesar 20% (b/b) terhadap berat epoksi. Berdasarkan spektra dari Fourier Transform Infrared (FTIR) dan 1 H-Nuclear Magnetic Resonance ( 1 HNMR) ditunjukkan adanya ikatan baru yang terbentuk dari hasil reaksi gugus isosianat dan gugus hidroksi, yang mana gugus hidroksi ini berasal dari epoksi dan 1,3-propanadiol. Penambahan silika (5, 10, dan 15% b/b terhadap berat epoksi) ke dalam epoksi termodifikasi poliuretan dilakukan melalui reaksi sol gel tetraetil ortosilikat (TEOS

Synthesis of Silanated Coconut Oil-Based Waterborne Polyurethane Coating for Corrosion Protection

“…In addition to that, similar studies state that increasing further the silane loading at more than 1 wt% compromises the material's property and this is due to an intense densification of the film, promoted by the addition of TEOS, a formation of cracks was observed [26]. These cracks could be due to the decrease of the tensile properties of the polyurethane coating [27]. This may be explained due to the siloxane moiety functioning as an internal plasticizer due to its flexible -Si-O-Silinkage.…”

“…The background sample used was the base metal substrate and the control was the WBPU-coated sample with 0% silane. The evaluation of the adhesive property of the coatings with the substrate was carried out using cross cut adhesion and shear strength tests of the prepared coating panels through ASTM D-3359-02 and ASTM F1044-05 standards, respectively [26,27]. The corrosion resistance of waterborne PU coatings was determined using potentiodynamic polarization (Potentiostat, Bio-Logic SP150) based on ASTM G3-14.…”

Study of the impact on occupational health of the use of polyaziridine in leather finishing compared with a new epoxy acrylic self-crosslinking polymer

“…In order to counteract this harmful effect on the work environment and health of the workers, a new epoxy acrylic self-crosslinking polymer has been developed for its application both in the base coat and the top coat, avoiding the use of such harmful crosslinkers [9][10][11][12][13][14][15][16].…”