Impact modifier for polyamides from Material Wizard — a copolymer grafted with maleic anhydride (MAH-grafted EPDM, POE or PE) that effectively increases the impact strength and low-temperature performance of PA6, PA66, PA610 and PA12 polyamide compounds. The MAH functional groups react chemically with the terminal -NH₂ groups of the polyamide matrix, forming a rubber dispersed phase of 200–500 nm — the optimal range for the craze-shear mechanism and maximum impact balance.

Brand mapping of global counterparts

• DuPont Fusabond® N493 / N525 — MAH-grafted EPDM, the classic choice for PA toughening
• Arkema Lotader® 3210 / 4720 — E/n-BA/MAH terpolymer for PA, PBT, PET
• Mitsui Tafmer® MH7020 / 5040 — POE-g-MAH with narrow MWD
• SK Functional Polymer Bondyram® 7103 / 7115 — a price competitor to Fusabond
• Lyondell Plexar® PX2049 — PE-g-MAH for thin-walled parts

Mechanism of action and optimal phase size

The MAH group reacts with the -NH₂ end of the polyamide chain to form a covalent amide bond — this anchors the rubber at the phase boundary and prevents coalescence during processing. The end result is a stable dispersed morphology with rubber domain sizes of 200–500 nm:

• < 100 nm — insufficient for effective impact energy dissipation (rubber inclusions are too small)
• 200–500 nm — the optimum for PA6/PA66: triggers the craze-shear mechanism, 3–5x increase in notched Charpy
• > 1 μm — the rubber phase becomes too large, stiffness is lost and surface defects appear

Typical dosage and effect

• 10–20 wt % in PA6/PA66 — the optimal range
• Notched Charpy @ 23 °C: increase from 5–8 kJ/m² (unmodified) to 25–60 kJ/m² (super-tough PA)
• Notched Charpy @ -40 °C: increase from 2–3 to 15–30 kJ/m² (critical for arctic applications)
• Tradeoff: 15–30 % reduction in tensile modulus; for GF-reinforced PA the reduction is less pronounced

Key markets

Automotive: super-tough PA6/PA66 for bumper brackets, airbag module housings, cold-snap latches, under-hood fasteners.

Power tools: impact-resistant housings for cordless drills, screwdrivers and hammer drills — withstand a 2 m drop onto concrete.

Sports industry: protective gear (hockey helmets, knee pads), bicycle pedals, ski bindings.

PA recycling: restoring the impact performance of recycled PA6 after thermo-oxidative degradation — 5–8 % of the modifier restores 70–80 % of the original impact strength.

Limitations — honestly

• Reduced stiffness and HDT — use GF-reinforced toughened PA for load-bearing structures
• Not for V-0 / V-2 applications without a separate FR additive
• Requires a twin-screw extruder with an adequate dispersion-mixing zone — a single-screw machine will not achieve the optimal domain size
• Not for food contact in the base formulation

Test methods

ISO 179-1eA (notched Charpy), ISO 180 (Izod), ASTM D5628 (instrumented impact), SEM microscopy for morphology verification (rubber domain size), DMA for the T_g of the rubber phase.

The values indicated are measured using internal methods close to the corresponding ISO and GOST standards. This information is provided for reference only and does not constitute an official technical data sheet for a batch. Please request the TDS and MSDS for the specific batch and grade before industrial use.

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Impact and elasticity modifier for polypropylene from Material Wizard — a line of POE (poly-octene-ethylene), PBE (propylene-based elastomer) and mEPDM-based impact modifiers for toughening PP homopolymer, PP copolymer and recycled rPP. It restores the flexibility and low-temperature impact strength typically lost through thermo-oxidative degradation during repeated reprocessing.

Brand mapping of global equivalents

• Dow Engage® 8842 / 8200 — POE (octene-ethylene) with a very narrow MWD, the flagship for PP toughening
• ExxonMobil Vistamaxx® 6202 / 7050 — propylene-based elastomer (PBE), excellent compatibility with the PP matrix
• LG Chem LUCENE® LF180 / LF150 — mPE (metallocene PE) for thin-wall molded PP parts
• Mitsui Tafmer® XM-7080 / DF-7350 — POE with a narrow MWD, medium-low density
• SABIC Fortify® C6C90A — POE for compatibilization of rPP with rPE contamination
• SK Functional Polymer Solumer 9650 — propylene-based plastomer

Chemistry and classification

• POE (poly-octene-co-ethylene) — the most common type: octene comonomer 30–50 %, density 0.86–0.89 g/cm³, very low Tg (-55 °C); delivers the maximum impact boost at -30 °C
• PBE (propylene-based elastomer) — propylene-dominant, the best compatibility with PP, minimal modulus reduction
• mEPDM — an ethylene-propylene-diene terpolymer made with metallocene catalysis; for special requirements on elongation and temperature resistance
• mPE — metallocene polyethylene, narrow MWD, an excellent impact/clarity balance for transparent PP formed parts

Typical dosage and effect

• 10–25 wt % in PP, peak impact boost at 15–20 %
• Charpy notched @ 23 °C: increase from 3–5 kJ/m² (unmodified PP homo) to 30–80 kJ/m²
• Charpy notched @ -30 °C: increase from 1–2 to 8–15 kJ/m² (critical for outdoor / automotive bumpers / arctic use)
• Trade-off: flexural modulus drops by 25–40 %; HDT/A falls by 15–25 °C
• For rPP recyclate: 5–10 % of modifier restores impact strength to 60–80 % of the original virgin PP level

Killer market: rPP recycling (the key driver for 2024-2026)

Regulatory context: EU 2030 targets — 30 % recycled content in packaging; the CSRD (Corporate Sustainability Reporting Directive) obliges companies to declare their recycled percentage. This creates mass demand for recyclate formulations in which a POE modifier is a critical ingredient.

The rPP problem: after 3–5 reprocessing cycles PP loses 40–60 % of its impact strength due to thermo-oxidative degradation (chain scission, formation of C=O groups). Adding 5–10 % POE brings impact strength back to 60–80 % of virgin PP while retaining 80–90 % of the original modulus.

Cost of the solution: an 8 % POE addition to rPP raises the cost by ~12 % but allows the product to be positioned as “50 % PCR” (post-consumer recycled) for brands with ESG commitments. The payback is the premium price of a “green”-certified product.

Target applications

Automotive: impact PP for bumper assemblies, sill trims, door panels, passenger seats; toughened PP for under-hood parts with low thermal load.

Packaging industry: impact PP for rPP food trays (meat, fish), thick-walled logistics containers, household chemical packaging.

Household appliances: impact-resistant housings of vacuum cleaners and kitchen appliances, hand-held pneumatic tools, mid-range cordless drill housings.

Agricultural machinery: irrigation system parts, sprayer housings, protective drone covers for agricultural use (with UV stabilization).

Industrial packaging: IBC containers, pallet boards, container handles and holders that withstand a 1.5 m drop.

Limitations — honestly

• Reduced stiffness (modulus -25…-40 %) and HDT (-15…-25 °C) at high dosage
• POE with 50+ % octene comonomer can migrate (“sweat out”) to the surface during long storage — for cosmetic applications use POE with a narrow MWD
• Not for FR applications without a separate V-2 package
• Requires a twin-screw extruder for optimal dispersion
• For transparent PP, mPE or PBE is preferable (POE can cause haze); for opaque parts — any type
• POE/PBE costs 1.5–2.5 times more than base PP — calculate the total formula cost

Test methods

ISO 179-1eA (Charpy notched @ +23 °C and -30 °C), ISO 180 (Izod), ASTM D790 (flexural modulus and strength), ISO 75-2 (HDT/A), MFI ISO 1133 (230 °C / 2.16 kg), SEM microscopy to verify phase morphology (a rubber domain size of 200–500 nm is optimal).

The values given are measured by in-house methods close to the corresponding ISO and GOST standards. The information is for reference only and is not an official technical data sheet for a batch. Please request the TDS and MSDS for the specific batch and grade before industrial use.

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Impact modifier and reactive chain extender for PET from Material Wizard — a line of epoxy-functionalized (GMA-grafted) and multifunctional epoxy chain-extender additives for toughening PET and rPET. The epoxy group reacts with the terminal -COOH and -OH groups of the PET chain at 240–280 °C, forming covalent links and establishing a 200–500 nm dispersed rubber phase for craze-shear dissipation of impact energy.

Brand mapping of global equivalents

• DuPont/Dow Elvaloy® PTW — E/n-BA/GMA terpolymer, the flagship for super-tough PET and airbag clips (see product card #1610 Elvaloy PTW)
• Arkema Lotader® AX8840 / AX8900 / AX8930 — GMA-containing terpolymers with varying % GMA and MAH
• Mitsubishi Chemical Modiper® A4400 / A8200 — Asian alternative for PET and nylon toughening
• BASF Joncryl® ADR-4368 / ADR-4400 / ADR-4385 — multifunctional epoxy chain extender (oligomeric styrene-acrylate), specifically for rPET IV recovery
• SK Functional Polymer Bondyram® 7103 / 7115 — GMA-grafted for cost-sensitive applications

Two classes of modifiers — for different tasks

1. Impact modifiers (Elvaloy PTW, Lotader AX8840): 10–20 % loading, a 3–10× increase in impact strength; the goal is super-tough PET for structural parts.

2. Chain extenders (Joncryl ADR-4368/4400): 0.3–0.8 % loading, recovery of the intrinsic viscosity (IV) of recycled rPET (IV recovery from 0.68 to 0.78 dl/g) without a significant change in impact. The goal is upgrading degraded rPET to bottle-grade or fiber-grade requirements.

Reaction mechanism with PET

The epoxy group (-CH(O)CH₂-) is opened by the action of the PET end groups:

• -COOH (carboxyl): forms a covalent -O-C(=O)- ester bond
• -OH (hydroxyl): forms an -O-CH₂-CH(OH)- ether linkage
• Effect: increased molecular weight (chain extension), recovery of melt viscosity, and for impact grades — anchoring of the rubber phase at the interface with the PET matrix

Typical additive effects

• Impact grade (15 % Elvaloy PTW / Lotader AX8840): Charpy notched @ 23 °C 3–5 → 25–55 kJ/m²; super-tough PET classification
• Chain extender (0.5 % Joncryl ADR): IV recovery 0.68 → 0.78 dl/g; a 2–3× MFI reduction; melt strength +200 % for extrusion / blow molding
• rPET bottle-to-bottle: 0.3–0.5 % chain extender allows rPET (100 % PCR) to be used for blow molding over 5+ cycles without quality loss
• rPET fiber grade: 0.5–0.8 % chain extender restores the IV drift to fiber-spinning requirements (IV >0.72)

Killer markets

1. Bottle-to-bottle rPET recycling (#1 driver 2024-2026): EU target of 30 % rPET content in beverage bottles by 2030 (Directive EU 2019/904 SUP); USA RPM targets in PA, CA. The chain extender is the critical additive for returning recycled PET to bottle grade.

2. Super-tough PET for technical parts: airbag clip-on connectors, automotive interior brackets (where low moisture absorption vs PA matters), high-strength bottle caps.

3. PET fiber recycling: textile-to-textile rPET (fabric polyester → yarn for fabric) — the chain extender restores IV for repeated fiber spinning, a key technology for H&M, Inditex and Nike ESG programs.

4. PET-blend compatibilization: PET/PE blends in multilayer packaging recycling — the GMA modifier compatibilizes the immiscible phases and provides usable mechanical properties in the recyclate.

Target applications

Packaging industry: PET beverage bottles with rPET content, containers for food (hot filling requires super-tough PET), cosmetics and household chemicals.

Textile industry: recycled polyester for clothing, technical fabrics, nonwovens (geotextiles), carpeting.

Automotive: super-tough PET (with 15 % impact modifier) for interior brackets, airbag module retainers, housings of small electrical devices.

Industrial tapes and films: PET film for packaging (12–250 µm thickness), magnetic tapes (legacy), battery separators (with a special grade).

Limitations — honestly

• Reaction temperature 240–280 °C: below this range the epoxy does not react with PET; above it, it may dimerize or crosslink (gels)
• Not for PE/PP blends: the epoxy does not react with polyolefin end groups; PE/PP/PA blends require MAH-grafted modifiers (#770 for PA, #768 for PP)
• The chain extender (Joncryl) at loadings >1 % can cause gel formation in bottle preforms — calibrate precisely
• The impact modifier (Elvaloy PTW) reduces PET bottle transparency — for clear-bottle applications the maximum loading is 5–8 %
• Not for food contact in unverified formulations — each grade requires separate FDA / EU 10/2011 / NSF migration verification
• Cost 3–8 times higher than base PET — justified for recyclate IV recovery (where the alternative is a ~30 % virgin PET premium) and for super-tough applications

Test methods

ISO 1628-5 (intrinsic viscosity), ISO 1133 (MFI), ISO 179-1eA (Charpy notched), ASTM D5630 (impact strength), GPC for molecular weight after chain extension, capillary rheometer for melt strength.

The stated values are measured using in-house methods close to the corresponding ISO and GOST standards. The information is provided for reference only and does not constitute an official technical data sheet for a batch. Please request the TDS and MSDS for the specific batch and grade before industrial use.

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