A hydrogenated hydrocarbon resin is a C5-, C9-, C5/C9- or DCPD-derived tackifier whose reactive unsaturation has been reduced with hydrogen. The treatment can produce a water-white, low-odor resin with stronger resistance to oxidation, heat, UV exposure and yellowing, making it valuable in color-sensitive hot-melt and pressure-sensitive adhesives.
What hydrogenation changes
Ordinary hydrocarbon resin contains unsaturated structures inherited from its petrochemical feedstock and polymerization route. Those sites can oxidize during storage, hot-melt processing or outdoor exposure, contributing to odor, color development and declining stability. Hydrogenation reduces these reactive sites. It does not turn the material into a structural polymer; the resin remains a low-molecular-weight thermoplastic tackifier.
The precursor still matters. Hydrogenated C5 resins tend toward aliphatic compatibility, while hydrogenated C9 and DCPD-derived resins can be engineered across cycloaliphatic and controlled aromaticity ranges. “Hydrogenated resin” therefore describes a process and performance family—not one interchangeable chemical.
Water-white also needs careful interpretation. It describes very low visible color, commonly reported on the APHA/Hazen platinum-cobalt scale. It does not by itself prove purity, zero VOC, food-contact status, skin-contact suitability or medical compliance.
In purchasing language, water white hydrocarbon resin usually means this very-low-color hydrogenated category, but a useful request still needs a numeric color limit and test method.
Partially hydrogenated vs fully hydrogenated resin
Hydrogenation level is a formulation lever. More complete saturation usually improves initial color, hot-aging color, oxidation resistance and UV stability. Controlled partial hydrogenation retains more aromatic character, which may broaden compatibility with selected higher-polarity or aromatic-containing polymers.
Typical selection tendencies — not universal specifications
| Selection factor | Partially hydrogenated resin | Fully hydrogenated resin |
|---|---|---|
| Residual structure | More controlled unsaturation or aromatic character | Most reactive unsaturation is saturated |
| Typical color | Low color to near water-white, grade-dependent | Water-white is commonly targeted |
| Odor and aging | Improved over the unhydrogenated precursor | Usually the strongest low-odor and anti-yellowing option |
| Compatibility direction | Can suit EVA, acrylic or aromatic-containing systems where some polarity is useful | Often favored with polyolefins, oils and the rubbery midblock of SEBS/SEPS systems |
| Best starting point | Balance of compatibility, color and cost | Maximum clarity, heat/UV stability and low odor |
These are tendencies, not a substitute for a compatibility map. Eastman’s published resin guide notes that full hydrogenation favors low-polarity polymers, while partial hydrogenation can retain compatibility with more polar systems. Feedstock, molecular weight, resin loading, oil and polymer architecture can reverse a simple rule of thumb.
Typical properties and how to read them
Public data for commercial water-white resins show why buyers must specify both value and method. Arakawa lists hydrogenated grades from 90°C to 140°C softening point with typical Hazen color around 20–50. Hanwha’s HC-100 data sheet reports a typical 103°C ring-and-ball softening point and APHA 20, while ExxonMobil publishes 105°C and 0.6 Yellowness Index for Escorez 5300. YI and APHA are different scales and should not be compared as if they were the same number.
Typical values — market screening ranges, not Milorez sales specifications
| Property | Typical screening value | Procurement note |
|---|---|---|
| Appearance | Water-white pellets, pastilles or flakes | Form affects feeding and blocking risk, not just appearance |
| Color, APHA/Hazen | Commonly 20–50 for water-white grades | State solvent, concentration and test method |
| Softening point, ring-and-ball | Common commercial range 90–140°C | ASTM E28 value is not a true melting point |
| Acid value | Commonly ≤1 mg KOH/g | Confirm the exact grade limit and method |
| Odor | Low to very low | Evaluate molten resin and the finished formulation |
| Heat/UV behavior | Better than the unhydrogenated precursor | Verify aged color under your real time and temperature |
For incoming approval, compare the TDS, agreed sales specification and batch COA. Then test melt viscosity, compatibility or cloud point, color after hot aging, and adhesive performance. A matching softening point does not establish equivalence.
Why hygiene hot melts use hydrogenated tackifiers
Disposable diapers, sanitary pads and adult-incontinence products combine nonwovens, films, elastic components and absorbent structures at high converting speed. Their construction and elastic adhesives must wet low-energy substrates, remain processable in a heated tank, and avoid objectionable odor or visible discoloration on white materials.
Hydrogenated hydrocarbon tackifiers are a mainstream—and often preferred—choice for these demands, although no public source supports claiming that one chemistry owns the entire hygiene market. Rain Carbon describes fully hydrogenated hydrocarbon resin as a first-choice tackifier for hygiene adhesives and highlights water-white color, no odor, thermal stability and compatibility with SBC, APAO and metallocene polyolefins. Kolon likewise recommends SUKOREZ grades for SIS-, SBS-, SEBS-, m-PO- and APAO-based hygiene HMPSAs.
This industry use does not make every hydrogenated grade “hygiene grade.” A formulator still needs to assess raw-material documentation, emissions, extractables, odor, thermal hold, sprayability, bond aging and all requirements that apply to the finished article.
Clear packaging, medical tape and SIS/SEBS systems
Typical application directions — final performance requires formulation trials
| Application | Why a water-white hydrocarbon resin is screened | Critical checks |
|---|---|---|
| Disposable hygiene hot melts | Low color and odor, hot-pot stability, compatibility with SBC/APAO/m-PO | Molten odor, spray pattern, peel, creep, aged color and emissions |
| Transparent packaging adhesive | Preserves clarity and limits darkening during heated application | Pot life, haze, set speed, fiber tear and food-packaging requirements |
| Medical tape and skin-contact PSA | Clear appearance, low odor and stable tackification | Biocompatibility, extractables, skin adhesion, residue and sterilization effects |
| SIS hot-melt PSA | Tackifies the rubbery polyisoprene phase and supports wetting | Loop tack, peel, shear, viscosity, cloud point and oil balance |
| SEBS adhesive or compound | Fully hydrogenated nonpolar resin can match the saturated rubber midblock | Midblock selectivity, clarity, heat aging and low-temperature performance |
For hot-melt adhesive development, test the complete polymer–resin–oil–wax–antioxidant package. Resin clarity alone cannot predict bond strength, and a clear adhesive is not automatically suitable for food or medical contact.
Milorez hydrogenated resin grades
Milorez is a transparent export trading company in Fujian, China. We match requirements to reviewed partner factories, coordinate the commercial order and check the agreed quality basis before shipment; we do not present ourselves as the manufacturer.
Typical values — Milorez grade-selection starting points
| Grade | Hydrogenation and appearance | Nominal softening point | Suggested first screen |
|---|---|---|---|
| MR-H100 | Fully hydrogenated, water-white | 100°C | Hygiene, clear packaging, tape and low-color SIS/SEBS formulations |
| MR-H110 | Hydrogenated, water-white selection | 110°C | Formulations starting from a higher softening-point target |
Request the current TDS before setting an acceptance specification. The commercial contract should state color scale and method, softening-point range, acid value, melt-viscosity method, appearance, packing and any application-specific document requirements.
Eastotac, SUKOREZ and Escorez comparison guides
An incumbent trade name is useful as a screening reference, but “equivalent” must mean comparable in the buyer’s formulation—not merely a similar headline number.
- Eastotac H-100 comparison guide covers the 100°C hydrogenated resin selection space and the checks needed beyond color and softening point.
- SUKOREZ SU-100 comparison guide focuses on water-white tackifier compatibility and hot-melt performance.
- Escorez 5300 comparison guide explains how its published 105°C softening point and water-white cycloaliphatic positioning relate to an alternative screen.
Eastotac, SUKOREZ and Escorez are trademarks of their respective owners. Milorez does not claim affiliation or drop-in equivalence. Approve any alternative through side-by-side laboratory and line trials.
How to buy hydrogenated petroleum resin
To receive a technically comparable quotation, send:
- incumbent brand and grade, or precursor chemistry and hydrogenation level;
- polymer system—SIS, SBS, SEBS, EVA, APAO, m-PO or another base;
- application and contact/compliance requirements;
- softening-point range, color scale and limit, viscosity target and odor expectations;
- monthly or annual demand, packing, destination port and requested Incoterm.
Milorez’s standard MOQ is 1 × 20’ FCL, quoted FOB Xiamen or Qingdao. A free sample is available for pre-order formulation screening. Use the sample request to share your test conditions, or email [email protected] for a TDS, sample and current price.
Sources
- Eastman, Spectrum of Hydrocarbon Resins — hydrogenation level, stability and polymer-compatibility guidance.
- Rain Carbon, NOVARES Hygiene Adhesives — hygiene applications and SBC/APAO/m-PO compatibility.
- Kolon Industries, Hydrocarbon Resin Applications — hygiene HMPSA requirements and recommended SUKOREZ grades.
- Arakawa USA, ARKON Hydrogenated Hydrocarbon Resins — published Hazen color and softening-point ranges.
- ExxonMobil, Escorez 5300 Product Data and Hanwha Solutions, HC-100 TDS — representative published values.
Frequently asked questions
What is the difference between hydrogenated and regular hydrocarbon resin?
Hydrogenation saturates reactive double bonds in a C5, C9, C5/C9 or DCPD-derived resin. Compared with a regular unhydrogenated grade, the resulting resin normally has lower color and odor plus better resistance to oxidation, heat and UV-related yellowing. Exact compatibility still depends on feedstock and hydrogenation level.
Is partially hydrogenated resin the same as fully hydrogenated resin?
No. A partially hydrogenated resin intentionally retains more unsaturation or aromatic character, which can help compatibility in selected systems. A fully hydrogenated grade prioritizes water-white color, low odor and environmental stability and is generally more aliphatic and nonpolar.
Is every water-white hydrogenated resin suitable for hygiene or medical use?
No. Water-white appearance and low odor are useful formulation properties, not a hygiene, food-contact or medical approval. The buyer must define applicable extraction, emissions, skin-contact, biocompatibility and finished-article requirements and review supporting documents for the exact grade and production source.
Can hydrogenated hydrocarbon resin be used with SIS and SEBS?
Yes, selected hydrogenated grades are widely evaluated with SIS and SEBS. Fully hydrogenated, low-polarity grades are especially relevant to the rubbery midblock of SEBS-type systems. Confirm compatibility, cloud point, viscosity, tack, peel, shear and aging in the complete formulation.
What determines hydrogenated petroleum resin price?
Price depends on precursor chemistry, hydrogenation degree, softening point, color target, order volume, packing, feedstock conditions and freight. For a comparable quote, provide an incumbent grade or full target specification, application, annual demand, destination port and Incoterm.
How can I buy hydrogenated petroleum resin from Milorez?
Send your polymer system, application, target softening point, color method and limit, current resin, quantity and destination port. Milorez offers a free sample for screening, a standard MOQ of one 20-foot FCL, and FOB Xiamen or Qingdao quotations.