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Chemical Identity & Synonyms
Product Name: Escorez™ 5690 (sometimes referenced as “Escorez 5690” or “Escorez 569”) in the 5600 series of tackifying resins.
Brand: Escorez™, by ExxonMobil Chemical.
CAS Number: The general product safety summary for the Escorez™ family lists several CAS numbers (e.g., 68478-07-9; 68527-25-3; 68132-00-3) for various series.
However, a specific CAS number for Escorez 5690 is not publicly listed in the freely available datasheets I found. The datasheet notes: “This product is included in TSCA inventory and its CAS number is available on demand.”
Synonyms:
“Escorez 5690 Resin”
“Aromatic modified, cycloaliphatic hydrocarbon resin – light colour” (per datasheet description)
More generically: Escorez™ 5600 series – aromatic modified cycloaliphatic hydrocarbon resin.
Product Description & Application
Escorez 5690 is part of the Escorez 5600 series of tackifying resins: “very light colour aromatic modified, cycloaliphatic hydrocarbon resins.”
Primary function: Tackifier resin for adhesives. Designed to “tackify a variety of adhesive polymers including EVA, SIS and SBS block copolymers and metallocene polyolefins.”
Typical forms: Light-colour pellets. Appearance: light colour, form: pellets.
Applications:
Hot Melts Adhesives (HMAs) & Pressure Sensitive Adhesives (PSAs) – the resin improves tack, adhesion, and compatibility with polymers.
Adhesive formulations using EVA (Ethylene-Vinyl Acetate), SIS (Styrene-Isoprene-Styrene), SBS (Styrene-Butadiene-Styrene) and metallocene polyolefins.
The marketing material suggests compatibility with many base polymers, polymer modifiers, and additives.
Physical & Chemical Properties
From available datasheets (values are typical / “not to be construed as specification”).
Typical values for Escorez 5690:
Softening point: ~90.5 °C (≈ 194.9 °F)
Colour – initial: ~0.8 YI (yellow index)
Aromaticity: ~10.1% (i.e., percentage of aromatic protons)
Melt viscosity: ~350 mPa·s (350 cP) at 160 °C (~320 °F)
Molecular weight (approx): Mn ~450 g/mol; Mw ~760 g/mol.
Glass transition temperature (Tg): ~44 °C (≈111 °F)
Colour stability: After 5 h at 175 °C, yellow index ~24.9 YI.
Interpretation/Notes:
The softening point around 90 °C places this in moderate temperature performance adhesives.
The low yellow index (0.8 YI) indicates a relatively light colour resin (important for light-colour adhesive formulations).
Aromaticity ~10% means there is a modest proportion of aromatic character—this affects compatibility with different polymers (aromatic vs aliphatic).
The molecular weights are relatively low for a “resin” (in polymer terms), which helps tackifier function (low molecular weight ensures flow, wetting).
The glass transition ~44 °C indicates that below this temperature, the resin becomes more glassy—important for adhesive performance at lower temperatures.
Melt viscosity ~350 cP at 160 °C shows ease of processing in hot melt adhesive systems.
Manufacturing / Chemistry
According to the product safety summary for the Escorez family:
“The first (series) consist of major components that are C5-C6 olefins and diolefins … The second family consists of major components that are polycyclodienes (C10-C12 cyclodiene dimers plus dicyclopentadiene with or without C8-C10 vinyl aromatics) … These resins are thermally polymerised.”
For the 5000 series (to which 5690 likely belongs), the manufacturing is via thermal polymerization of cyclodiene hydrocarbons and/or vinyl aromatics.
The parent hydrocarbon feed has been hydrogenated/debenzenized as needed.
The raw materials: steps may include polymerizing petroleum hydrocarbon feed stocks (naphtha, light steam-cracked aromatics, piperylene, DCPD) to form the tackifier resin.
The final product is then processed into pellets, tested for colour, softening point, aromaticity, etc.
The polymerisation method ensures a low molecular weight resin with specified softening point and aromaticity tailored for adhesive compatibility.
Compatibility & Formulation Considerations
As a tackifier resin, Escorez 5690 interacts with base polymers (e.g., EVA, SIS, SBS).
Key formulative characteristics: supply of tack (i.e., surface stickiness), improved cohesion, balance of adhesion/cohesion, melt viscosity compatibility, colour and stability.
Because the resin has modest aromatic content (≈10%), it offers good compatibility with non-polar adhesives (e.g., polyolefins) and copolymers with moderate polarity.
Higher aromatic content resins may better suit more aromatic polymers, but may have poorer clarity or colour.
The light colour (low YI) helps when formulated in adhesives for lighter colour packaging or transparent systems, where darker resins would colour or yellow the adhesive.
Processing: The resin must melt and disperse readily.
A melt viscosity of ~350 cP at 160 °C is acceptable for hot-melt adhesive extruders or coating operations.
The softening point ~90 °C means the resin remains stable under typical adhesive service temperatures but tack is retained.
Adhesive formulation trade-offs: Too much tackifier may reduce cohesive strength or heat resistance; too little yields poor tack.
Selection of tackifier grade (softening point, aromaticity, colour) is critical.
Stability: Thermal and colour stability are important.
The datasheet notes the resin’s performance after 5 hrs at 175 °C (a colour index).
For adhesive manufacturing (which may involve elevated temperatures), this indicates reasonably good heat-ageing performance.
SAFETY INFORMATION ABOUT ESCOREZ 569
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
