LOTADER 8200

LOTADER 8200 is a pellet-form random terpolymer of ethylene, ethyl acrylate, and maleic anhydride.
Hot-melt adhesives, polyamide impact modification, and mineral-filled compounds are the principal established applications for LOTADER 8200.
The high melt flow, ethylene-rich backbone, and reactive maleic anhydride groups of LOTADER 8200 account for its ability to enter blends and interact with polar materials. 

CAS Number: 41171-14-6 (ethylene–ethyl acrylate–maleic anhydride polymer; not unique to this grade)
EC Number: Not available for the specified commercial grade
Molecular Formula: Variable (random terpolymer with no fixed sequence or chain length)
Molecular Weight: Variable; no average molecular weight is published for LOTADER 8200

Synonyms: LOTADER R8200 (historical grade designation), Maleic Anhydride Functionalized Ethylene-Ethyl Acrylate Terpolymer, Maleic Anhydride Functionalized Ethylene Acrylate Copolymer, Maleic Anhydride Modified Ethylene-Ethyl Acrylate Copolymer, Maleated Ethylene-Ethyl Acrylate Copolymer, Maleated Ethylene Acrylate Copolymer, MAH-Functionalized Ethylene-Ethyl Acrylate Copolymer, MAH-Modified Ethylene-Ethyl Acrylate Copolymer, Reactive Ethylene-Ethyl Acrylate-Maleic Anhydride Terpolymer, Reactive Ethylene Acrylate Terpolymer, Reactive Ethylene Copolymer with Maleic Anhydride, Functionalized Ethylene Co-Terpolymer, Functionalized Ethylene Terpolymer, Ethylene Co-Terpolymer, Maleic Anhydride Functionalized Ethylene-Ethyl Acrylate Polymer, Ethylene-Ethyl Acrylate Anhydride Functional Polymer, Ethylene Acrylic Ester Anhydride Terpolymer, Ethylene-Ethyl Acrylate Reactive Terpolymer, Ethylene-Based Reactive Terpolymer, Polyolefin Maleic Anhydride Terpolymer, Reactive Polyolefin Terpolymer, Hot-Melt Adhesive Ethylene Terpolymer, Compatibilizer Ethylene-Ethyl Acrylate-Maleic Anhydride Terpolymer

APPLICATIONS

Hot-melt adhesives

LOTADER 8200 enters hot-melt adhesive formulations as a reactive polymer component alongside selected base polymers, tackifying resins, and waxes.
Compatibility with common hot-melt formulation ingredients allows LOTADER 8200 to be blended into systems designed for melt application.
The contribution of LOTADER 8200 to adhesion and flow depends on the complete formulation and the surfaces being joined. 

In polyolefin elastomer-based hot melts, LOTADER 8200 can increase bonding to substrates that the unmodified adhesive wets poorly.
The ethylene-rich portion of LOTADER 8200 provides affinity for compatible polyolefin phases, while polar comonomer units contribute to interfacial adhesion.
Formulators assess LOTADER 8200 with the chosen elastomer because compatibility and bond strength change with the surrounding resin blend.
Plastics present different surface energies and thermal limits, so LOTADER 8200 requires substrate-specific adhesion trials.
When a hot melt contacts a suitable plastic surface, LOTADER 8200 can contribute polar interactions absent from an entirely nonfunctional polyolefin.
Contact pressure, melt temperature, and surface condition determine whether LOTADER 8200 can form an effective joint.
LOTADER 8200 also contributes to hot melts intended for metals and coated carton.

At those interfaces, LOTADER 8200 supplies polar functionality while the molten adhesive spreads across the available surface.
A coating on carton can control adhesion more strongly than the underlying paper, making tests with the actual coated stock necessary. sk-fp.com
Packaging adhesives are one process context in which LOTADER 8200 may be incorporated into a formulated hot melt.
For a packaging line, LOTADER 8200 must be evaluated as part of the adhesive’s application viscosity, setting behavior, and bond strength.
Any packaging use of LOTADER 8200 that involves regulated contact requires an assessment of the finished formulation and intended conditions.
Technical textiles and engineered webs provide further applications for hot melts containing LOTADER 8200.

A formulation containing LOTADER 8200 can be applied while molten to create bonds between selected polymeric or coated layers.
The suitability of LOTADER 8200 depends on the web materials, coating weight, application temperature, and flexibility required after cooling.
Hot melts containing LOTADER 8200 have also been identified for electronic component encapsulation applications.
In such formulations, LOTADER 8200 contributes flow and adhesion during placement of the molten material around the assembly.
Electrical performance, long-term stability, and compatibility with component materials must be established for the finished encapsulant rather than inferred from LOTADER 8200 alone.

The high melt index of LOTADER 8200 gives formulators a relatively fluid polymer component under the specified melt-flow test conditions.
Adding LOTADER 8200 can therefore change how a hot melt is mixed, pumped, or applied, although the finished adhesive has its own temperature-dependent viscosity.
LOTADER 8200 loading must be balanced against the cohesion and service-temperature requirements of the adhesive joint.
Tackifier and wax selection remains consequential when LOTADER 8200 is incorporated into an adhesive.
LOTADER 8200 has documented compatibility with these formulation ingredients, but their proportions still govern wetting, setting, and the structure of the cooled bond.
Screening LOTADER 8200 across the intended application-temperature range is more informative than relying on a single melt-index value.

Polyamide modification

LOTADER 8200 serves as an impact modifier in polyamide compounds.
During melt blending, LOTADER 8200 forms a comparatively soft polymer phase whose dispersion in the polyamide matrix affects the resulting toughness.
The improvement obtained with LOTADER 8200 depends on phase size, interfacial adhesion, polyamide type, and compounding conditions. 

Maleic anhydride groups on LOTADER 8200 can react with amine end groups accessible in a polyamide melt.
That reaction can strengthen the interface between dispersed LOTADER 8200 and the surrounding polyamide.
The extent of interaction involving LOTADER 8200 depends on available end groups, residence time, temperature, and mixing history.
Polyamide processing commonly requires higher melt temperatures than polyolefin compounding, and LOTADER 8200 is specified for use under polyamide processing conditions.
The stated thermal stability of its acrylate comonomer permits LOTADER 8200 to enter these hotter melt-blending operations.
Processors still control residence time and local overheating when incorporating LOTADER 8200 into a polyamide formulation. 

The high flow of LOTADER 8200 can assist distribution through a polyamide melt during compounding.
Effective impact modification nevertheless requires LOTADER 8200 to develop an appropriate dispersed morphology rather than merely mixing quickly.
Trial compounds should be examined for the intended balance of impact response, stiffness, tensile properties, and processability.
LOTADER 8200 can be fed during extrusion or another controlled melt-compounding operation for polyamide modification.
After a processing run with LOTADER 8200, a low-density polyethylene purge is recommended to limit gel formation in the equipment.
That purge recommendation concerns processing cleanliness and does not establish a required ingredient for the final polyamide compound.

Mineral-filled compounds

LOTADER 8200 acts as a coupling component in selected mineral-filled polymer compounds.
Within the melt, LOTADER 8200 brings an ethylene-rich polymer backbone into proximity with comparatively polar filler surfaces.
This combination can improve contact between filler and matrix when LOTADER 8200 is compatible with the chosen polymer formulation.
High mineral loading makes filler dispersion and interfacial contact especially important for LOTADER 8200 applications.
The fluid melt behavior of LOTADER 8200 can help the coupling component distribute through a heavily filled mixture during compounding.
Actual dispersion with LOTADER 8200 depends on filler surface chemistry, particle characteristics, mixing intensity, and the remaining formulation.
A documented use for LOTADER 8200 is the highly filled, halogen-free flame-retardant core compound of an aluminum composite panel.
LOTADER 8200 is recommended as a high-fluidity coupling agent for core formulations with mineral filler content above 75 percent.
In this construction, LOTADER 8200 belongs to the compounded core; the panel’s separate adhesive layers require their own material selection. 

LOTADER 8200 does not itself supply the mineral fraction responsible for the flame-retardant design of such a core.
Instead, LOTADER 8200 addresses the processing and interfacial demands created when a large amount of mineral is combined with polymer.
The finished compound containing LOTADER 8200 must be assessed for its specified fire performance and mechanical properties.
During manufacture of a filled core, LOTADER 8200 must be distributed sufficiently to contact filler throughout the melt.
Poor distribution of LOTADER 8200 can leave local regions with different filler wetting and processing behavior.
Mixing sequence, feed method, and temperature should therefore be set for the complete mineral-filled formulation rather than transferred unchanged from an unfilled resin process.

Compatibilization of polymer blends

LOTADER 8200 can function as a compatibilizing component where an ethylene-rich phase is combined with a more polar phase.
At a blend interface, LOTADER 8200 offers polyolefin affinity together with ethyl acrylate and maleic anhydride functionality.
The effect of LOTADER 8200 depends on the identity of both polymers and on the interfacial area created during mixing.
For blends containing a reactive partner such as polyamide, LOTADER 8200 can participate in interfacial reactions during melt processing.
Where no suitable reactive groups are accessible, LOTADER 8200 may still affect wetting and phase behavior, but the mechanism will differ.
Blend trials with LOTADER 8200 should distinguish a chemical interfacial reaction from an improvement caused primarily by physical compatibility.
LOTADER 8200 has a specified melt index of 200 g/10 min at 190°C under a 2.16 kg load.
That value identifies a particularly fluid grade for processes in which LOTADER 8200 must spread through another molten material.
The same value cannot predict the rheology or final properties of every blend containing LOTADER 8200.

Aqueous dispersions and coatings

LOTADER 8200 has been investigated as the polymer feedstock for prepared aqueous dispersions.
Converting LOTADER 8200 into a dispersion requires a separate controlled process; the supplied pellets are insoluble in water.
The maleic anhydride content and high melt flow of LOTADER 8200 were factors in the reported dispersion development. sk-fp.com
In reported coating trials, a prepared dispersion of LOTADER 8200 was applied to aluminum foil and dried before heat sealing.
The resulting LOTADER 8200 coating was tested against polymer films, including low-density polyethylene, polypropylene, and polyester.
These results concern the processed dispersion and tested coating conditions, rather than direct application of untreated LOTADER 8200 pellets.
Reported trials found strong adhesion from LOTADER 8200 dispersion coatings to low-density polyethylene and polypropylene films.
Adhesion of LOTADER 8200 coatings to polyester was also examined, with further testing identified as necessary.

Coating thickness, drying, sealing temperature, pressure, and substrate grade all affect how LOTADER 8200 performs in this specialist use. 
Paper-coating studies provide another development context for dispersions prepared from LOTADER 8200.
In those studies, a LOTADER 8200-derived coating was evaluated for resistance to water uptake at a specified coating thickness.
Such experimental results describe a particular prepared coating and do not make pellet-form LOTADER 8200 a ready-to-apply waterborne material.

DESCRIPTION

LOTADER 8200 is a random terpolymer whose chains contain units derived from ethylene, ethyl acrylate, and maleic anhydride.
For LOTADER 8200, the stated comonomer contents are approximately 6.5 percent ethyl acrylate and 2.8 percent maleic anhydride by weight.
Those values describe incorporated units in LOTADER 8200 and must not be read as percentages of free monomers in the pellets.
Because LOTADER 8200 contains chains of differing lengths and sequences, no single molecular formula or molecular weight represents the grade.
The ethylene-derived portions give LOTADER 8200 a substantial nonpolar character and affinity for compatible polyolefin materials.
Ethyl acrylate units add polarity to LOTADER 8200, while maleic anhydride units supply sites capable of further chemical interaction.
LOTADER 8200 is supplied as solid pellets for melt processing.

The typical density of LOTADER 8200 is 0.94 g/cm³, and the grade’s reported melting point is about 100°C.
LOTADER 8200 is insoluble in water; a specially prepared aqueous dispersion is a distinct formulation with different physical behavior.
Melt flow is a defining specification for LOTADER 8200.
At 190°C under a 2.16 kg test load, LOTADER 8200 has a typical melt index of 200 g/10 min.
That test indicates the flow of LOTADER 8200 under standard conditions but does not directly state viscosity at every operating temperature or shear rate.
Maleic anhydride units allow LOTADER 8200 to interact with suitable polar surfaces and reactive polymers.

In particular, accessible amine groups in a polyamide melt can react with anhydride functionality on LOTADER 8200.
For mineral-filled compounds, contact between LOTADER 8200 and the filler also depends on the mineral surface and compounding history.
The balance of ethylene, ethyl acrylate, and maleic anhydride distinguishes LOTADER 8200 from other reactive terpolymer grades.
Changing any of those proportions can alter polarity, crystallization, interfacial behavior, and compatibility, even when the constituent monomers are the same.

LOTADER 8200 must therefore be identified by its grade specifications as well as by its broad polymer-family name.
On compression-molded specimens, LOTADER 8200 has a reported Shore D hardness of 26 and flexural modulus of 40 MPa.
The reported tensile strength at break of LOTADER 8200 is 6 MPa, with elongation at break of 400 percent.
These measurements characterize LOTADER 8200 under the stated specimen preparation and test methods, not a compound containing other polymers or high filler levels. 

LOTADER 8200 can tolerate the processing temperatures associated with its documented polyamide-modification role.
Excess heat or extended residence can nevertheless degrade LOTADER 8200 or contribute to processing deposits, so temperature control remains necessary.
Moisture protection during storage helps preserve the intended condition of LOTADER 8200 before melt processing.
Neither the pellets nor the melt of LOTADER 8200 should be confused with an aqueous solution.
Prepared dispersions contain finely distributed LOTADER 8200 polymer in a separate waterborne system and have formulation-dependent properties.
The physical-property values in this profile describe pellet-form LOTADER 8200 unless a different test specimen is explicitly identified.

PROPERTIES

Appearance: Solid pellets, natural to colorless
Odor: Slight acrylic odor
Ethyl acrylate content: Approximately 6.5 wt%
Maleic anhydride content: Approximately 2.8 wt%
Density: 0.94 g/cm³, ISO 1183
Water solubility: Insoluble
Melt index: 200 g/10 min at 190°C under 2.16 kg, ISO 1133
Melting point: Approximately 100°C, ISO 11357 or ASTM D3418
Vicat softening temperature: 57°C under a 10 N load, ISO 306 or ASTM D1525
Flexural modulus: 40 MPa on compression-molded specimens, ISO 178
Tensile strength at break: 6 MPa on compression-molded specimens, ISO 527 or ASTM D638
Elongation at break: 400% on compression-molded specimens, ISO 527 or ASTM D638
Hardness: Shore D 26 on compression-molded specimens

FIRST AID

Inhalation:

Move anyone who has inhaled fumes from overheated LOTADER 8200 to fresh air.
Keep the person at rest and obtain medical attention if coughing, breathing difficulty, or other symptoms occur.
Seek urgent medical care if breathing is seriously impaired.

Skin contact:

Wash skin exposed to LOTADER 8200 pellets or residue with soap and water.
For molten LOTADER 8200, cool the affected area promptly with running water and do not pull adhered polymer from the skin.
Obtain prompt medical treatment for a burn or persistent irritation.

Eye contact:

Rinse eyes exposed to LOTADER 8200 particles or processing fumes gently with water for at least 15 minutes.
Remove contact lenses if present and easy to remove, then continue rinsing.
Obtain medical attention for continuing irritation or any contact with molten LOTADER 8200.

Ingestion:

Rinse the mouth after accidental ingestion of LOTADER 8200 pellets.
Do not induce vomiting or give anything by mouth to an unconscious person.
Seek medical advice if a substantial amount was swallowed or symptoms occur.

HANDLING AND STORAGE

Handling:

Transfer LOTADER 8200 pellets with equipment that limits spills and the generation of fines.
Wear suitable eye protection and gloves, and use heat-resistant protection wherever molten LOTADER 8200 could contact skin.
Keep food and drink away from processing areas and wash hands after handling.

Ventilation:

Provide general ventilation where LOTADER 8200 pellets are transferred or compounded.
Use local exhaust at heated processing equipment to remove fumes generated by LOTADER 8200, especially if overheating occurs.
Prevent airborne accumulation of polymer fines during conveying, grinding, or cleanup.

Storage:

Store LOTADER 8200 in dry, ventilated conditions away from heat, humidity, and direct sunlight.
Keep LOTADER 8200 in waterproof packaging or a container with a waterproof liner.
Reseal opened bags or liners promptly to protect LOTADER 8200 from moisture. 

Spill and leak procedures:

Restrict access to a LOTADER 8200 pellet spill because loose pellets create a slipping hazard.
Collect LOTADER 8200 mechanically into suitable containers while avoiding unnecessary generation of airborne fines.
Prevent LOTADER 8200 pellets from entering drains, and manage recovered material according to local requirements.

Handling precautions:

Control processing temperatures and residence time to reduce overheating and fumes from LOTADER 8200.
Keep hands clear of hot dies, transfer lines, and molten LOTADER 8200, which can cause serious thermal burns.
After a LOTADER 8200 processing run, purge equipment with low-density polyethylene where appropriate to reduce gel formation.