Inhibispheres Technology

Transcription

1 Inhibispheres Technology Dr. Andy Noble-Judge Coating Formulation Specialist 1

2 Overview Introduction to Ceramisphere Encapsulation technology Inhibispheres Products Protection on Aluminum Protection on Steel Competitive advantages Conclusions 2

3 Ceramisphere Pty Ltd 3

4 Ceramisphere Created in 2007 (ANSTO) Privatized in 2010 Controlled release technology Sol-Gel encapsulation 13 patent families 2 business units Healthcare (drug delivery systems) Industrial (coating additives) Offices, labs and manufacturing in Sydney 4

5 Encapsulation technology

6 Ceramisphere technology Combination of emulsion and sol-gel chemistry Emulsion provides compartmentalisation Sol-gel process allows the formation of ceramic matrix at room temperature Ceramisphere process is true encapsulation process: the matrix is formed around the active providing enhanced protection of the payload Ceramisphere technology produces matrix particles i.e. full spheres with the active homogenously distributed inside the pores NOT capsules i.e. ping pong ball or core shell. Matrix Core Shell 7

7 Particle size can be precisely controlled from 50 nm to 50 µm Controlled by the emulsion droplet size Tailored Particle Size 7

8 Controlled Release Controlled release is achieved through a precise control of the internal nano-structure of the spheres 8

9 Key Features and Benefits Particles Payloads Controlled release Mechanical resistance Size control Easy dispersion Negligible toxicity Biocompatibility Inert Maximum protection Minimum interaction (physical) Water soluble Solvent soluble Release rate manipulation Meso/micro porous Sphere chemistry 9

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11 10 year Collaboration with Airbus Group Innovations to replace highly toxic Cr VI in aerospace coatings with non-toxic controlled release solution Last 3 years transitioned from micro encapsulation company to smart pigment manufacturer Moved beyond Aerospace into other segments of the industrial coatings market (Al to Steel) Starting to develop anti-fouling and biocidal formulations Inhibispheres for Corrosion Protection 11

12 Mode of Action Inhibispheres are porous silica particles containing encapsulated corrosion inhibitors and their payload is released by diffusion through the porous silica matrix The spheres can be easily introduced in the paint or coating formulation and are designed to avoid leaching in the pot Inhibispheres which are homogeneously dispersed inside the coating become activated, either during the rupture of the coating or by the presence of water in the paint film during immersion or condensation. The release inhibitors then diffuse rapidly to the corrosion site. 12

13 Inhibispheres ISB Fast release Micron sized Water compatible Solvent compatible Organic inhibitor CSH Medium release Submicron sized Water compatible Organic inhibitor ISM Slow release Submicron sized Water compatible Solvent compatible Organic inhibitor Protection of Aluminium with Inhibispheres Protection of Steel with Inhibispheres ISA Slow release Submicron sized Water compatible Solvent compatible Organic inhibitor ISZB Medium release Submicron sized Water compatible Solvent compatible Organometallic ISZS Fast release Micron sized Water compatible Organometallic 13

14 Inhibispheres on Aluminium ISB Fast release Micron sized Water compatible Solvent compatible Organic inhibitor CSH Medium release Submicron sized Water compatible Organic inhibitor ISM Slow release Submicron sized Water compatible Solvent compatible Organic inhibitor Protection of Aluminium with Inhibispheres Inhibispheres Loading (%) Size (D50-µm) Density (g/cm 3 ) B H M

15 Inhibitors Immersion of Al/Cu couple in 5% NaCl sol n Scanning with electrode Reduction in admittance with inhibitor No inhibitor ISB inhibitor ISM inhibitor 15

16 Local Electrochemical Impedance Spectroscopy (LEIS) Scribe in coated panel No inhibitor Vs 10% ISB Water based 2K epoxy Analysis after 24 and 168 hours immersion Significant reduction in corrosion Impedance spectroscopy Chromate free Inhibispheres 16

17 Salt Spray ASTM B µm film thickness 2K water based epoxy 10% ISB 10% Chromate free inhibitor 1000 hours shiny scribe No evidence of corrosion products in scribe Corrosion products Shiny Scribe Control Cr Free IS product Significant reduction in corrosion with IS Pitting reduced with 2% CSH product 17

18 Inhibispheres on Steel Protection of Steel with Inhibispheres ISA Slow release Submicron sized Water compatible Solvent compatible Organic inhibitor ISZB Medium release Submicron sized Water compatible Solvent compatible Organometallic ISZS Fast release Micron sized Solvent compatible Organometallic Inhibispheres Loading (%) Size (D50-µm) Density (g/cm 3 ) ZS ZB A

19 Corrosion Protection Protection for steel High concentration of corrosion inhibitor in paints Primers contain ZP, Zn dust, etc. Paint type Typical % inhibitor in paint ISA 10% inhibitor loading at 10% wt. in paint = 1% inhibitor Lower loading for similar or better performance Typical % inhibitor in dry film Zinc phosphate Zinc dust >85 Inhibispheres 2-10 (0.2-2) 6-30 (0.6-6) 19

20 Corrosion Protection Thickness = 75 µm ASTM B117 Sand-blasted Steel EN K Epoxy Solvent based system 0.3% wt. inhibitor Sample Time (hr) Creep area (cm 2 ) ISA 2% (25% less) ZP 10% Comparable performance ISA ZP 20

21 Corrosion Protection Thickness = 75 µm ASTM B117 Sand-blasted Steel EN K Epoxy Solvent based system reep area ave. (3 panels) 0.5% wt. inhibitor Sample Time (hr) Creep area (cm 2 ) ISZS 5% (55% less) ZP 10% ISZS 5% (40% less) ZP 10% Improved performance ISZS ZP 21

22 Scribe depth (mm) Corrosion Protection Scribe depth after 1000 hours salt spray Profilometer gives scribe depth for comparison Control 0,400 Scribe depth at 1000 hours salt spray 0,350 ZnPO 4 0,300 0,250 0,200 0,150 0,100 0,050 0,000 0,260 0,255 0,143 0,120 0,091 Control ZP ISA ISZB ISZS ISZS 22

23 Zinc dust and ZnPO 4 SDS s have aquatic toxicity labelling i.e. zinc based primers have aquatic toxicity labelling Green Technology Zinc ISA organic inhibitor (no aquatic toxicity labelling) ISZB and ISZS organometallic inhibitors do have aquatic toxicity labelling (lower levels) Less labelling better for the safety and the environment No additional labelling required upto 10% loading in your product ZnPO 4 ISA 23

24 Gloss units (GU) IS topcoats show minimal reduction of gloss at levels as high as 10% Allows for use in topcoats or DTM Can add functionality to decorative coats Gloss ,8 90,3 Gloss of coatings with Inhibispheres 99 92,8 94,7 85, ,9 4,3 Blank ZP10 (10%) ISM (2%) ISM (10%) 60 degree gloss 20 degree gloss 24

25 Paint Simplification Commercially available 2 coat paint system Primer - 1K solvent epoxy with ZnPO 4 and MiO x Topcoat - 2K solvent PU glossy finish Standard 2 coat system IS in 2K topcoat DTM (no primer) ASTM B117 Inhibispheres at 10% ZnPO 4 at ~ 20% (in primer) Similar performance 1000 hours Sample Time (hr) Creep area (cm 2 ) 2 Coats Coat (IS) (10% less) 25

26 Same ZnPO4 primer with MiO x Primer only no scribe (500 hours NSST) Dose response for Is addition Extension of life Increasing inhibitor reducing corrosion Blan ISA 2% ISA 5% ISA 10% k 26

27 Anti-fouling Inhibispheres technology can be extended beyond corrosion protection in coatings Developing a series of biocidal and antifouling Inhibispheres In water testing began in March 2017 Controlled release of agents for Anti-fouling coatings Anti-mould coatings Anti-fungal coatings Anti-microbial coatings 27

28 Inhibispheres Key Features and Benefits Coatings Effective Green Simple Compatible Cost Labelling Incorporation Actives Performance Metal free Paint System Paint 28

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