News Details

Nanoparticles modified waterborne polyurethane coatings with crosslinking agent

2017-3-26 20:31:00

Nanoparticles modified waterborne polyurethane coatings with crosslinking agent,Nanoparticles by fill the coating film is the main corrosion mechanism of shrinkage cavity, increase the crosslinking degree of coating, prevent corrosion factor into the base material, improve the corrosion resistance of coating, to protect the base material; At the same time also can improve the mechanical properties, thermal stability and electrochemical properties of the coating, etc.

Li wen to waterborne polyurethane acrylate, waterborne epoxy acrylates, silicone acrylic emulsion, waterborne polyurethane, light initiator, prevent flash rust agent, pigment and filler such as the preparation of a kind of waterborne UV silicone - polyurethane anticorrosion coating.

Its preparation method is: according to the matching according to take various raw materials, to water-borne polyurethane acrylate, water-borne epoxy acrylate, silicon a crylic-acid emulsion, water-based polyurethane mixed evenly, and then join in turn light initiator flow ping agent, pigment and filler and other components, evenly dispersed to grinding, grinding fineness to less than 30 microns.

The anticorrosive coatings with good adhesion, good water resistance, salt fog resistance, high hardness, good wear resistance, good gloss and aging resistance, etc. The preparation method is simple, convenient operation, low preparation cost.

Christopher, such as the preparation of PVA modified graphene oxide (GO)/ZnO and PVA modified carbon black (CB)/ZnO nanocomposite, again to waterborne polyurethane modified synthesis of low carbon steel with water-based polyurethane anticorrosion coating.

The EIS results show that the polarization resistance increases with increasing PGZ as well as the content of PCZ, WPU 0.3% / 0.3% PGZ and WPU/PCZ polarization resistance were 56.85 k Ω cm2, 10.37 k Ω cm2. By comparing the conclusion that WPU 0.3% / 0.3% PGZ and WPU/PCZ are to a certain extent, improve the anti-corrosion performance of waterborne polyurethane, but compared with the WPU / 0.3% PCZ, WPU / 0.3% PGZ has more excellent dispersity, stability and anticorrosion performance.

Christopher, etc by using oleic acid modified ZnO interact with the polymer substrate interface to improve the performance of waterborne polyurethane coating. Unmodified waterborne polyurethane in the water contact Angle is 65.78 °. After modification of waterborne polyurethane ZnO is more hydrophobic, the contact Angle is 75.78 °.

Chinese name: Diethyl toluene diamine(DETDA)

Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine

English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;

CAS No. :68479-98-1

EINECS No. :270 -877-4

Molecular formula: C11H18N2

Molecular Weight: 178.28

Boiling point: 310 ℃

Refractive index: 1.581

Flash Point: > 140 ℃

Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022

Risk Codes: R10; R35

RIDADR: UN 3082

Safety instructions: S2; S26; S39; S61

Packing Group: III

Hazard Class: 6.1

The EIS results show that the polarization resistance with the increase of ZnO content, from 0.758 k Ω cm2 increases to 13.739 k Ω cm2. Oleic acid modified ZnO nanoparticles can be well dispersed in aqueous polyurethane coatings, and effectively prevent corrosion material into the base material, which has excellent corrosion resistance performance.

Christopher to using sonic degradation such as sodium alginate (SA) and lignosulfonate (LS) to modify ZnO, the preparation of biomacromolecule modified ZnO/waterborne polyurethane coatings. SA/WPU, 0.3% to 0.3% of the LS/WPU polarization resistance were 4.45 k Ω cm2, 21.51 k Ω cm2. The results show that lignin sulfonate/ZnO composite corrosion resistance of water-borne polyurethane is superior to sodium alginate/ZnO composite water-based polyurethane.

M. Rashvand etc with the mass fraction of 3% nanometer ZnO and water-based polyurethane blend, waterborne polyurethane was nano composite coating. ESI test showed that nanometer ZnO composite coating is better than common waterborne polyurethane coating has better film resistance;

After 1080 hours salt spray resistance test, the composite nanometer coating thickness is still up to 2-3 mm, basic no difference with the traditional anticorrosion coating. The results showed that nanometer ZnO improves the protection performance of waterborne polyurethane has excellent corrosion resistance.

Li, etc will be oxidized graphene, functionalized graphene mixed with waterborne polyurethane, used to improve the corrosion resistance of waterborne polyurethane, EIS test shows that the impedance modulus of up to 109 Ω, 3.5% sodium chloride solution soak resistance modulus basic did not change after 236 hours. Compared to common waterborne polyurethane, graphene change performance effectively improve corrosion resistance of waterborne polyurethane.