| Polyester-Melamine Coil Coating Primer (Formulation #2.1) | GRACE | Polyester-Melamine Coil Coating Primer (Formulation #2.1) is a guideline formulation offered to highlight the anti-corrosive and adhesion performance of SHIELDEX® C 303, a high performance non toxic heavy metal free, anti-corrosive pigment specially designed to replace Strontium Chromate in coil coating primers. Dynapol L205 and Dynapol L208 are high molecular weight polyester resins widely used in coil coating primer applications for both building and domestic appliance applications. Cymel 350 is a typical melamine based crosslinker...view more Polyester-Melamine Coil Coating Primer (Formulation #2.1) is a guideline formulation offered to highlight the anti-corrosive and adhesion performance of SHIELDEX® C 303, a high performance non toxic heavy metal free, anti-corrosive pigment specially designed to replace Strontium Chromate in coil coating primers. Dynapol L205 and Dynapol L208 are high molecular weight polyester resins widely used in coil coating primer applications for both building and domestic appliance applications. Cymel 350 is a typical melamine based crosslinker. The cure reponse within this formulation was controlled by the use of Silane A187 (Silane Ester), Epoxy blocked Phosphoric acid (co-catalyst), EDBSA (sulphonic acid co-catalyst) and Halox 650 (Dicarboxylic acid). These components prevent the interaction of SHIELDEX® anti-corrosive pigments with the acid catalysts and any acidic functionality on the resins, thus ensuring maximum cure response. view less | |
| Epoxy Coil Coating Primer (Formulation #2.2) | GRACE | Epoxy Coil Coating Primer (Formulation #2.2) is a formulation that utilizes SHIELDEX® C 303, a high performance non toxic heavy metal free, anti-corrosive pigment specially designed to replace Strontium Chromate in coil coating primers. Epikote 1007 and Epikote 1009 are standard epoxy resins used in coil coating primer applications. UFR 80 is a typical urea based crosslinker...view more Epoxy Coil Coating Primer (Formulation #2.2) is a formulation that utilizes SHIELDEX® C 303, a high performance non toxic heavy metal free, anti-corrosive pigment specially designed to replace Strontium Chromate in coil coating primers. Epikote 1007 and Epikote 1009 are standard epoxy resins used in coil coating primer applications. UFR 80 is a typical urea based crosslinker used in these applications. The cure response within this formulation was controlled by the use of Epoxy blocked Phosphoric acid (co-catalyst) and Halox 650 (dicarboxylic-acid co-catalyst). These components prevent the interaction of SHIELDEX® anti-corrosive pigment with the acid catalysts and any acid funtionality on the resin systems, thus ensuring maximum cure response. The SHIELDEX® C 303 anti-corrosive pigment containing epoxy coil primer was applied on Bonder 1303 (ex Chemetall) and Granodine C 108 (ex Henkel) treated galvanised steel test panels. The primer was applied by bar coater to a dry film thickness of 5 – 7 microns. Cure was to a peak metal temperature (PMT) of 216 – 224 °C. A polyester-melamine topcoat was applied to a bar coated dry film thickness of 20 – 25 microns and cured to a PMT of 232 – 241 °C. view less | |
| 1-Pack Polyurethane Coil Coating Primer (Formulation #2.3) | GRACE | 1-Pack Polyurethane Coil Coating Primer (Formulation #2.3) is a guideline formulation based on Dynapol L205 (high molecular weight polyester resin) crosslinked with Desmodur BL 3175 (a blocked isocyanate). Dabco T12 (dibutyltindilaurate) was used as the c...view more 1-Pack Polyurethane Coil Coating Primer (Formulation #2.3) is a guideline formulation based on Dynapol L205 (high molecular weight polyester resin) crosslinked with Desmodur BL 3175 (a blocked isocyanate). Dabco T12 (dibutyltindilaurate) was used as the catalyst. SHIELDEX® C 303 is a high performance non toxic heavy metal free, anti-corrosive pigment specially designed to replace Strontium Chromate in coil coating primers. The 1-Pack-Polyurethane primer was tested on Bonder 1303 treated galvanised steel test panels (ex Chemetall) at a bar coated dry film thickness of 5 microns. Cure was to a peak metal temperature (PMT) of 224 °C. A polyester-melamine topcoat was applied to a bar coated dry film thickness of 20 – 25 microns and cured to a PMT of 232 °C. view less |
