May 2010, Tomek Wierzchowski of ICD High Performance coatings will be presenting an interesting paper on “100% silicone based spandrel and decorative coatings”.
This paper will describe the formulation and properties of silicone based coatings for spandrel and decorative application. Two different silicone systems will be discussed:
• The OC500 coating is based on 100% silicone resin and utilizes addition reaction for crossliking. This coating has shown outstanding adhesion to sputter coated, float and pyrolitic glass substrates and passed 5000 hours of QUV without any visiblegloss or film defects as per ASTM C1142. In addition, it shows no defect after ten days in boiling water.
• The Deco Vas coating is based on hybrid silicone resin and utilizes moisture cure system. This coating has shown outstanding adhesion to sputter coated, float (air and Sn side) glass substrates. Fully cured coating is scratches and weathering resistant.
Both coatings are 100% green with zero VOC and can be applied by roll coat or screen print. The coatings can be formulated with any colors including metallic.
The chemistry, physical properties and applications of this coating will be discussed in detail at the presentation.
There looks to be some fantastic topics at the symposium this year, several from ICD will be in attendance yet not me. I hope they bring me back a Mojito or some ceviche.
Important news that I neglected to report on, this occurred back in December 2009. OPACI-COAT-500® was subjected to testing under the Glass Association of North America89-1-6(2008) Specification for Environmental Durability of Heat Treated Spandrel Glass with Applied Opacifiers.
All colors submitted passed all sections without issue. Contact ICD for a copy of the full report.
Only Dow Corning 995 Silicone Structural Sealant and Dow Corning 983 SGS are acceptable for structural glazing on OpaciCoat 500 coated surfaces
OPACI-COAT-500® must be applied by an approved applicator per ICD (Approved Factory Fabricator or AFF)
Quality control methods and records from the coating application must be continuously maintained by the applicator. Dow Corning may request these at any time; but maintenance and auditing of such QC programs/records is at the discretion of ICD and their approved applicators.
Dow Corning structural warranties do not cover substrate failure or any loss of adhesion between the coating and the glass
Truly an exciting time for ICD and OPACI-COAT-500®.
In a joint project with Dow Corning, our OPACI-COAT-500® was put against the ropes in a very tough round of 4-Sided Structural Glazing tests.
Testing done by Architectural Testing in Everett, WA.
A curtain wall mock-up was made with our product with the sole purpose of testing the adhesive bond of the coating to the glass and to the sealant. Assembly was with fully tempered glass in a standard IGU and OPACI-COAT-500® on the #4 surface. Then glazed into place with Dow Corning’s 995 structural silicone.
Evaluation was conducted in accordance with:
ASTM E 283-04, Test Method for Determining Rate of Airflow Through Exterior Windows,
Curtain Walls and Doors Under Specified Pressure Differences Across the Specimen.
ASTM E 330-02, Test Method for Structural Performance of Exterior Windows, Curtain Walls and Doors by Uniform Static Air Pressure Difference.
ASTM E 331-00, Test Method for Water Penetration of Exterior Windows, Curtain Walls and Doors by Uniform Static Air Pressure Difference.
This is where it all got very cool.
ASTM E 283 “Air Filtration”, all results were <0.01 cfm/ft2.
ASTM E 331 “Water Resistance” with 15 psf, no leakage at all.
Wait for it, this is the cool part.
ASTM E 330 “Uniform Performance”, positive and negative loads held for 10 seconds @ 155 psf, no glazing failure. In fact, the equipment wasn’t able to produce enough load to cause failure. So they decided to cause failure and observe what happens.
A negative 100 psf load was applied, and forced breakage of the exterior lite was accomplished by striking the exposed edge of the glass. The bond of the silicone coating was unaffected.
And
A negative 50 psf load was applied, and forced breakage of the exterior lite was accomplished by firing a steel ball at the lower corner. The bond of the silicone coating was unaffected.
I’d say that’s pretty cool. :)
Here are some photos from the test as well as a great video showing the pillowing out and in of the glass, yet no failure.
In the paint industry we have dealt with tightening of regulations for years, from lower VOC’s to the removal of heavy metals, such as lead. We know these pigments and solvents cause people to get sick and they technically should not be allowed in a sustainable and green building.
Why should we not delay this?
1. It’s been known for some time and it’s not a surprise to anyone. Places like southern California have not been able to use certain products because of VOC’s and heavy metals for some time.
2. There are alternatives that have been around for over 25 years, one of our products for one: OPACI-COAT-300/500.
Our safe products can be used in the same equipment as ceramic enamel, so why delay, your solution is already out there.
