Permabond Initiator 44 (for use with the TA series of Toughened structural acrylic adhesive)

Product Name

Permabond Initiator 44

Brief Description

Permabond Initiator 44 is a monomer-based, solvent-free activator designed to initiate and accelerate the cure of Permabond TA series toughened structural acrylic adhesives (such as TA459, TA4590, and TA4591). It facilitates rapid strength development in no-mix bonding applications by being applied to one bonding surface, with the adhesive applied to the other, curing upon contact.

Popular Applications & Uses

- Initiating the cure for Permabond TA series structural acrylic adhesives.- Bonding tight-fitting parts where a short cure time is beneficial.- Achieving rapid fixture and full cure for high-strength structural bonds.- Bonding various substrates including metals, ferrites, ceramics, and certain thermoplastics.- Applications requiring non-corrosive bonding, particularly to sensitive copper parts or other electrically conductive surfaces (when used with compatible TA adhesives like TA4590).

Industries that Commonly Use It

- Aerospace/Defense- Automotive Service/Repair- Chemical Industry- Distributers & Resellers- Fabrication- General Manufacturing- Industrial Supply- LED/Electronics- Marine- Metal Fabrication- Transportation/Specialty Vehicle

Special and Unique Features

- Specifically formulated for use with Permabond TA series toughened acrylic adhesives in a no-mix system.- Monomer-based formulation requires no dry time after application.- Solvent-free, contributing to a safer application environment.- Offers flexibility with a long open time if needed, or allows for immediate bonding.- Easy brush-on liquid application.- Non-corrosive to sensitive copper parts or electrically conductive surfaces when paired with specific TA adhesives (e.g., TA4590).

Key Properties

- **Color:** Green liquid.- **Viscosity:** <50 mPa.s (cP), approximately 45 mPa s @ 23°C- **Flashpoint:** >100°C- **Specific Gravity:** 1.1- **On-part life:** 30 minutes.- **Fixture Time (with TA4590 on steel):** <15-30 seconds.- **Full Cure:** 24 hours for maximum bond strength.- **Solubility:** Insoluble in water, soluble in organic solvents.

Surface Compatibility

- Designed for use with Permabond TA series structural acrylic adhesives.- Requires surfaces to be clean, dry, and grease-free prior to application.- Compatible with a wide range of substrates including metals (e.g., steel, zinc plated, aluminum, copper), ferrites, ceramics, and some rigid plastics when used with appropriate TA adhesives.- For optimal adhesion on some metals like aluminum and copper, light abrasion to remove oxide layers may be beneficial.

Known backups / known substitutes

- Permabond Initiator 43 (another initiator for acrylic adhesives).- Permabond Initiator 45 (a similar product in the Permabond initiator range).- Other activators or primers specifically designed for structural acrylic adhesives from various manufacturers.

Comparison Note

Permabond Initiator 44 stands out as a dedicated activator for Permabond's TA series toughened structural acrylic adhesives, forming a unique no-mix system. Its monomer-based, solvent-free composition eliminates the need for drying time, a key advantage over solvent-based primers. This allows for immediate assembly and rapid cure, distinguishing it from two-part adhesives that require pre-mixing or other activators with different application methods or cure profiles.