MR-5920 is a medium-aromatic C5/C9 copolymer tackifier with a nominal 100°C Ring-and-Ball softening point. It is intended for EVA and styrenic-block-copolymer hot melts, pressure-sensitive adhesives, rubber compounds, sealants, and polymer modification. The grade sits in the general selection space of international 100°C C5/C9 products such as HIKOREZ® T-3100.
Typical values
The values below are typical values informed by public TDS data for established C5/C9 copolymer resins. They are not universal specifications. The current Milorez TDS and agreed purchase limits control commercial supply.
| Property | Typical value | Method / condition |
|---|---|---|
| Softening Point (R&B) | 100°C | ASTM E28 |
| Color (Gardner) | 4-5 typical; ≤6 maximum | 50% in toluene, ASTM D1544 |
| Acid Value | ≤0.3 mg KOH/g | ASTM D974 |
| Softening Point Variation | 98-102°C | Normal supply window |
| Melt Viscosity | 110-150 mPa·s | 200°C, ASTM D3236 |
| Appearance | Pale-yellow granules | Visual |
Compared with MR-5910, MR-5920 offers a higher softening point and a stronger aromatic contribution. This generally improves compatibility with more aromatic polymer domains and can increase cohesion, but the effect depends on polymer architecture, oil, wax, and resin loading.
Formulation and application notes
MR-5920 can be screened with EVA, SIS, SBS, SBR, natural rubber, synthetic polyisoprene, and selected APAO systems. In hot-melt adhesives, first check blend clarity and viscosity across the actual production temperature range. Then measure open time, set speed, hot tack, peel strength, shear holding power, and heat resistance.
For PSA systems, medium aromatic modification can improve interaction with styrenic domains, but too much compatibility with the end blocks may change cohesion and failure mode. Use side-by-side testing rather than relying on a generic “C5/C9” label.
In rubber compounding and sealants, assess processing, filler wetting, green tack, extrusion behavior, creep, and final mechanical properties. The stated acid value and color are useful purchasing controls, while molecular-weight distribution and aromatic level may explain performance differences between nominally similar grades.
When replacing a current resin, keep the polymer, oil, antioxidant, and mixing sequence fixed for the first trial. If adjustment is needed, change one variable at a time and record the result. This is especially important when moving between MR-5910 and MR-5920.
Packaging, MOQ, and shipment
MR-5920 is packed in 25 kg bags on pallets. Standard MOQ is 1 × 20’ FCL, approximately 18 metric tonnes. Quotations are available FOB Xiamen or FOB Qingdao. A free 1-2 kg sample is available for formulation work; courier freight is collected from the recipient.
International grade comparison
MR-5920 can be screened beside HIKOREZ T-3100-class C5/C9 resin, but color method, aromatic modification, molecular weight, and viscosity must be aligned; see the HIKOREZ alternative guide.
Request TDS & Sample
Email [email protected] with your polymer, current resin, application temperature, target tack and cohesion, color limit, annual demand, and destination port. Request the current TDS and a 1-2 kg sample for matched-condition testing.
Frequently asked questions
How does MR-5920 differ from MR-5910?
MR-5920 has a higher nominal softening point and a medium-aromatic compatibility profile, while MR-5910 is the lower-softening, lower-aromatic option.
Which applications fit MR-5920?
Common screening applications include EVA and styrenic-block-copolymer hot melts, pressure-sensitive adhesives, rubber compounds, sealants, and polymer modification.
Is MR-5920 equivalent to HIKOREZ T-3100?
It is positioned in a similar 100°C C5/C9 category, but direct equivalence is not guaranteed. The buyer should compare clarity, viscosity, tack, peel, shear, and aging.
What is the minimum order?
Standard MOQ is one 20-foot FCL, approximately 18 metric tonnes in 25 kg bags with pallets.