MR-5910 is a low-aromatic C5/C9 copolymer tackifier with a nominal 86°C softening point. It is positioned for evaluation against Wingtack™ 86-type application requirements in pressure-sensitive adhesives, hot-melt adhesives, sealants, rubber compounds, and wax-modified systems. Its lower softening point supports wetting and aggressive tack, while C9 modification broadens compatibility beyond a purely aliphatic C5 resin.
Typical values
The table gives typical values derived from public data for established 86-90°C aromatically modified C5 and C5/C9 resins. Values are formulation-screening guidance, not final sales limits.
| Property | Typical value | Method / condition |
|---|---|---|
| Softening Point (R&B) | 86°C | ASTM E28 |
| Color (Gardner) | 2-3 typical; ≤4 maximum | 50% in toluene, ASTM D1544 |
| Acid Value | ≤0.5 mg KOH/g | ASTM D974 |
| Softening Point Variation | 83-90°C | Normal supply window |
| Melt Viscosity | 60-100 mPa·s | 200°C, ASTM D3236 |
| Appearance | Light-yellow granules | Visual |
MR-5910 is the lower-aromatic member of the MR-59 pair. “Low aromatic” is a relative product-positioning description, not a universal compositional standard. If aromatic content is a release-critical parameter, state the required test method and limit in the inquiry.
Formulation and application notes
MR-5910 is a practical starting point with SIS, SBS, SBR, natural rubber, synthetic polyisoprene, butyl rubber, lower-VA EVA, and selected APAO or polyolefin systems. The low softening point can help initial tack, substrate wetting, and lower processing viscosity. The trade-off may be reduced shear or warm-temperature cohesion compared with a 100-110°C resin.
For PSA qualification, compare loop or rolling-ball tack, 180° peel, static shear, failure mode, and aging. For hot melts, record blend clarity, viscosity at the actual application temperature, open time, set speed, and heat resistance. Wax and oil selection can materially change compatibility.
In sealants and rubber compounds, assess extrusion or mixing behavior, green tack, creep, filler wetting, and final mechanical properties. If MR-5910 gives the required tack but insufficient cohesion, combine it with a higher-softening grade in a controlled ratio rather than changing resin, oil, and polymer simultaneously.
Wingtack 86 public data provides a useful selection reference, but differences in feedstock and molecular-weight distribution can alter performance even when softening point and color appear similar.
Packaging, MOQ, and shipment
Standard packing is 25 kg bags on pallets. MOQ is 1 × 20’ FCL, approximately 18 metric tonnes. Milorez offers FOB Xiamen or FOB Qingdao terms and coordinates release documentation and pre-shipment checks. A free 1-2 kg sample is available, with courier freight collected.
International grade comparison
MR-5910 is designed for side-by-side screening with Wingtack 86, not automatic substitution; compare chemistry, melt viscosity, tack, peel, and shear with the Wingtack 86 equivalent guide.
Request TDS & Sample
Email [email protected] with your base polymer, current tackifier, resin loading, process temperature, key adhesive targets, annual volume, and destination port. Request the current TDS and a 1-2 kg laboratory sample.
Frequently asked questions
What is the target softening point of MR-5910?
MR-5910 has a nominal Ring-and-Ball softening point of 86°C, with a normal evaluation window of approximately 83-90°C.
Is MR-5910 a direct Wingtack 86 replacement?
It is designed for screening in the Wingtack 86 application window, but no universal drop-in claim is made. Aromatic modification, molecular weight, tack, peel, and viscosity should be compared.
Which polymers are suitable starting points?
MR-5910 can be evaluated with SIS, SBS, SBR, natural rubber, butyl rubber, suitable EVA grades, APAO, and selected polyolefin systems.
What sample quantity can Milorez provide?
A 1-2 kg sample is free for laboratory evaluation; courier freight is collected from the recipient.