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Acrylic resin paint used crosslinking agent
2017-7-3 23:23:59
Acrylic resin paint used crosslinking agent
The performance test of the coating resistant chemical reagent is visible, and the AR is a linear polymer with good chemical properties and other properties. At the same time, the linear resin topology formed by the cross linking of EMF is three-dimensional network structure, which increases the bonding force between the polymer.
When add modified Gr in the coating of the modified polar bond can be united in wedlock with AR molecules by molecular force, as the coating provides good resistance to chemical reagent soaking, superior to the organic silicon modified AR coating (4 d), water resistance, better than that of pentaerythritol modified AR coating (poor solvent resistance, water resistance 5 d), better than that of nano SiO2 hybrid fluorine silicone modified AR coating (7 d) resistance to water.
Not add Gr acrylic resin coating, Gr, modified acrylic resin coating and in mass fraction of 3.5% NaCl solution, 40 ℃ under the condition of immersion corrosion coating TG curve of the sample after 3 d. Before and after corrosion coating specimen under nitrogen atmosphere, 40 ~ 600 ℃ range only happens once thermal decomposition, AR coating is uniform components.
According to ASTM E1213-1997, maximum weight loss rate before and after corrosion of corrosion system temperature is 388 ℃ and 384 ℃, corrosion coating samples before and after starting weightlessness temperature (334 ℃ and 346 ℃) is far higher than that of without Gr acrylic resin decomposition temperature is 244 ℃, mainly because of joined the Gr (thermal decomposition temperature above 400 ℃) and so on packing, improve the heat resistant coating.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
Coating after corrosion weight loss rate, means after the preparation of the coating in corrosion still has good thermal stability, than without the crosslinking modification of AR coating (maximum weight loss rate, temperature of 200 ℃) and use polyurethane doped AR coating initial decomposition temperature (205 ℃) increased by 67.5% and 67.5% respectively.
To study the structure stability of the AR coating, Gr, add not Gr acrylic resin coating specimen, Gr modified acrylic resin coating and its application in 40 ℃, the mass fraction of 3.5% NaCl solution soaking coating sample after 3 d FTIR analysis.
Before and after corrosion coating sample in 3 411 cm - 1 from modified hydroxyl absorption peak of Gr, 3 129 cm - 1 from AR carboxy hydroxy absorption peak, 1 727 cm - 1 C = O absorption peak in modified Gr, 621 cm - 1 in AR carbon - carbon double bond vibration absorption peak, 1 appear from AR 404 cm - 1 - C (CH3) 3 absorption peak, 1 C appears modified Gr - 171 cm - 1 O absorption peak, 114 cm - 1 AR ester base absorption peak.
The absorption peak of the properties of AR and Gr in the coating is unchanged, which means that the corrosion does not cause structural changes to the main components of the coating. In addition, the main absorption peak of AR is outside the range of solar spectrum, so the finished AR paint has excellent light resistance and anti-aging properties.
Based on orthogonal test score results available main formula of the optimum conditions for AR coating preparation 50.00% (mass fraction, the same below), EMF, 10.00% 0.10% Gr, ZnO 3.75%, Zn3 (PO4) 23.75%, according to the formula of the coating performance is better.
Gr TVOC and modified acrylic resin coating is an experiment to release a quantity to the national standard of 1/5 and 1/40, clear coating is a kind of low pollution of green environmental protection coating, coating chemical solvent resistance stability, thermal decomposition temperature is not add Gr coating improved over 60%.
Gr add make AR coating has excellent performance, to overcome the poor mechanical properties and solvent resistance and heat resistance shortcomings, is better than the unmodified AR AR coating, coating and conventional modifier modified with graphene density is small, less dosage, better efficacy, etc.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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