OP-234 | Nano-Scale Adhesion-Promoting Surface Treatment

Main features

Improved adhesion strength of paints/coatings on metal surfaces
No outgassing
No stress build-up on the substrates

Product Description

Aculon OP-234 is a high-performance, nano-scale surface treatment designed to dramatically improve adhesion of coatings to metal surfaces, especially where thiol-reactive chemistries are involved. Engineered for compatibility with epoxies, (meth)acrylics, and other cross-linking systems, OP-234 forms a thin, invisible, and stable monolayer that promotes strong chemical bonding without altering substrate appearance.

This clear, low-viscosity solution is based in isopropanol and is compatible with conventional wet-coating techniques such as spraying, dipping, or wiping, making integration into existing processing lines easy and efficient.

Applications:

Enhanced epoxy-to-metal adhesion in electronics and semiconductor packaging
Improved lead-frame bonding for over-molding and encapsulation
Delamination prevention in high-reliability finished products
Superior interface strength in radiation-cured or thermoset coatings

Specifications
Additional Information

Technical Specifications

General Properties

Color

Color
The color

clear

Shelf Life Shelf Life Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties. It differs vastly per product and it is based on temperature and storage conditions. The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ 25°C	730 days

Physical Properties

Viscosity

Viscosity
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application

2 mPa.s

Electrical Properties

Visible Light Transmission

100 %

Thermal Properties

Boiling Point

Boiling Point
The amount of degree’s needed to reach in order to make the substance boil.

82 °C

Additional Information

Surface Preparation/ Cleaning:
Ensure that the surface is free of any grease, fingerprints or dirt (i.e., water break free). This can be accomplished by first degreasing the surface with solvents or by rinsing with soap and water. The next step is to remove monolayer-scale contaminants. This is typically performed by using a cleaner specifically designed for the metal you are working with. Contact Aculon if you are unsure what cleaner to use and we will recommend one best suited for your application. The substrate should be water break - free before continuing to coating steps.

Treatment Application:
Spray: Spray the solution onto the substrate using doubl e passes. Post-application curing is recommended for best performance. Spray Equipment Suggestions: HVLP (Binks Mach 1), HVLP (Devilbiss JGHV), Air Atomizatation (Devilbiss MBC gun), and Airless (Graco Model 225-292 President Pump Series A)

Dip: – Immerse the substrate in the solution for five minutes. If a shorter dip time is necessary, then a post-cure is recommended for optimal performance (sonication while dipping can boost performance in some cases).

Dip Coating with Sonication: Ensure the substrate is clean. Completely submerge the substrate in the solution and sonicate for five minutes. Remove substrate from the solution and allow to air dry , preferably in a clean area.

Drying/ Curing: If curing is necessary (short dip times or spray-application), the treated substrates are best cured at 120C peak metal temperature for approximately 30 seconds. For silicon and titanium
oxides, lengthening the cure time to 5 minutes is recommended.
*Note: If OP-234 is being used to adhere a high viscosity or low-reactive resin system, especially if such coating is not cured after application, then it is suggested to do a post cure rinsing step (or post-treatment rinse if curing was not performed) for best performance. In certain cases it is also possible to directly blend the active materials into a coating; contact an Aculon representative if this approach is of interest to you.

Safety, Handling, Storage, Shelf Life:
Store in a cool (~25C) and dry area, and keep away from direct sun light. See this product’s MSDS for proper handling and fire hazard data. When stored properly, product has a 2 year shelf life from the date it is opened.