Name: Maleic Anhydride Grafted Adhesion Promoter MA-Graft
Brand: Coatingsink
SKU: maleic-anhydride-adhesion-ma-graft
Availability: InStock

Question 1

How does MA-Graft bond to non-polar polyolefin substrates without a primer?

Accepted Answer

MA-Graft contains maleic anhydride groups grafted onto a polyolefin backbone. The polyolefin backbone is compatible with PP/HDPE/TPO substrates through co-crystallization and chain entanglement, while the anhydride groups react with amine or hydroxyl functionalities in the coating binder, forming covalent bonds across the interface.

Question 2

What coating binder types are compatible with MA-Graft?

Accepted Answer

MA-Graft is most effective with amine-functional or hydroxyl-functional binders including epoxy-amine, polyurethane (where the anhydride reacts with the amine or urethane forming group), and acrylic systems containing primary or secondary amine functionality. It also improves adhesion with 2K PU coatings at elevated cure temperatures.

Question 3

Is surface pretreatment still required when using MA-Graft on TPO automotive bumpers?

Accepted Answer

In many cases MA-Graft reduces or eliminates the need for flame or plasma treatment on TPO. However, for high-gloss OEM automotive applications where cross-cut adhesion must meet ISO 2409 Class 0, a brief flame treatment combined with MA-Graft at 5% loading is still recommended to ensure consistent production-line results.

Appearance	White to off-white pellets
Softening Point	140–155°C
Recommended Dosage	2–10% in formulation
Grafting Degree (MA)	0.8–1.2 wt%
Melt Flow Index (190°C/2.16 kg)	80–120 g/10 min

Maleic Anhydride Grafted Adhesion Promoter MA-Graft

Specifications

FAQ

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