ChemPoint - Product ArticlesChemPoint - Product Articles

    Innovative New Resins for Adhesion to Difficult Substrates

    Acrylic coatings and adhesives provide outstanding UV stability, temperature stability, and overall durability; however, these coatings and adhesives are only useful if they can achieve adhesion to the target surface. When it comes to adhesion there is no substitute for a clean, well prepared surface.

However, choosing the proper resin can help to extend the working life of acrylic coatings and adhesives and improve the overall performance of the system.  Elvacite® Acrylic resins have long been a leader in manufacturing quality acylic resins used in coatings and adhesives for plastics, metals, concrete, wood, & paper.  Recently, Mitsubishi Chemical has released some new grades specifically targeted at improving adhesion to difficult substrates like metals and plastics.

Elvacite® 4347

Metals such as aluminum, steel, copper, and zinc are frequently used in challenging environments that require a protective coating to prevent corrosion and rust.  Adhesives that bond metal are also gaining popularity as stress on joints can be distributed across the bond line rather than concentrated at fastening sites.  Bonding to metal can be tricky and most of the time light sanding and a primer are necessary.  Elvacite® 4347 provides outstanding adhesion to untreated and unprimed metals.  It also has the flexibility, outdoor durability, and abrasion resistance needed for the most challenging applications and environments.

    PropertyTypical Value
    AppearanceWhite, spherical beads
    Chemical CompositionMethyl Methacrylate Copolymer
    Molecular Weight50
    Tg (°C)140,000
    Acid Value (mg KOH/g)7.5

Elvacite® 4345

Sometimes intial adhesion of a coating or adhesive is good but once stress is applied to the bond adhesion issuses arise.  This type of adhesive failure is usually due to a lack of flexibility and is a common issue for applications like packaging where flexible films are utliized.  Elvacite® 4345 is a low Tg butyl methacylate resin ideal for adhesives and coatings that are applied to smooth plastic and metallized films.  It can also be used to plasticize other resins to improve felxibility and adhesion to flexible substrates.

For a starting point formualtion for a flexible laminating adhesive based on Elvacite® 4345 click here.

    PropertyTypical Value
    AppearanceWhite, free flowing bead
    Chemical CompositionN-butyl Methacrylate
    Tg (°C)20
    Molecular Weight211,000
    Acid Value (mg KOH/g)0

Elvacite® 4036

Polypropylene, polyethylene, and thermoplastic olefins are popular materials in many applications because they are light-weight, durable, and inexpensive.  These surfaces are however difficult to adhere to and typically require surface preparation prior to painting or bonding.  Elvacite® 4036 has shown improved adhesion to untreated polyolefins and provides the weatherability, gloss, and abrasion resistance you would expect from an acrylic.

For a starting point coating formualtion based on Elvacite® 4036 click here.

    PropertyTypical Value
    AppearanceSpherical beads
    Chemical CompositionMethacrylate Copolymer
    Molecular Weight50
    Tg (°C)60,000
    Acid Value (mg KOH/g)3.5
ChemPoint - Product Articles

Need help choosing a grade?  Click the link below to visit our Elvacite® selection guide to walk through resin selection step by step.

Looking for a place to start?  Click the link below to visit our Elvacite® starting point formulation library.

Get a Sample

PHONE  425.372.9464