Blend in PP impact copolymer
- How toughness is bought
- Dilute the homopolymer with copolymer
- Dose
- 5–50% PP CP
- Recipe cost
- Goes up: PP CP costs more
FlagshipImpact modifier for polypropylene
Double the impact.
Priced below the polymer.
ASN APEX‑519 changes the crystal structure of PP homopolymer, so just 1% doubles its notched Izod impact strength. And because it costs less than PP homopolymer, every kilo you add lowers the cost of your recipe.
The challenge
Stiff is easy. Tough costs extra.
PP homopolymer is stiff but brittle. The usual fix is to blend in 5–50% PP impact copolymer, at a higher cost. What moulders need is the opposite: more impact, at a lower dose, at a lower cost.
Re‑engineer PP’s own crystals
- How toughness is bought
- A hexagonal crystal lattice that absorbs impact
- Dose
- 1–5% APEX‑519, 3% typical
- Recipe cost
- Goes down: priced below PP homopolymer
The proof
Over 100% more impact, at just 1%.
Notched Izod doubles from 35 to 70 J/m at 1% loading and holds there to 5%. Above 5%, impact declines. The recommended window is 1–5%, with 3% optimal for most applications.
+100%notched Izod impact at 1% loading, holding to 5%
35 → to 70J/m, neat PP homopolymer to 1% APEX‑519
3%optimum dose: good dispersion plus the property boost
Base resin: Reliance H110MA PP homopolymer, MFI 11. ASN internal test data. Source: APEX‑519 TDS 2026.
The money
Every kilo you add lowers your recipe cost.
Most additives are a cost you justify. APEX‑519 is priced below PP homopolymer, so it pays twice: it lets PP homopolymer replace up to 20% of the dearer impact copolymer, and each kilo of it costs less than the PP it displaces.
The recipe rule
PP homopolymer can replace up to 20% PP impact copolymer in any recipe.
Above 20%, keep the extra PP CP. Run APEX‑519 at 3%.
1.90 g/cc
Density, ASTM D792. Higher additions lower recipe cost further but add part weight, so stay within the 1–5% recommendation.
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Current 100% PP HPWith APEX‑519 at 3% 97% PP HP + 3% APEX‑519
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Current 80% PP HP + 20% PP CPWith APEX‑519 at 3% 97% PP HP + 3% APEX‑519
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Current 70% PP HP + 30% PP CPWith APEX‑519 at 3% 87% PP HP + 10% PP CP + 3% APEX‑519
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Current 50% PP HP + 50% PP CPWith APEX‑519 at 3% 67% PP HP + 30% PP CP + 3% APEX‑519
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Current 100% PP CPWith APEX‑519 at 3% 17% PP HP + 80% PP CP + 3% APEX‑519
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Current or100% PP CPWith APEX‑519 at 3% 97% PP CP + 3% APEX‑519
How it works
Molecular modification, not rubber.
APEX‑519 changes PP’s own crystal structure. It gives polypropylene a hexagonal crystal lattice, so the part takes a blow by flexing instead of breaking.
A crack runs straight through.
Tightly packed, rigid crystals give the crack an easy path. The part breaks.
The impact is soaked up.
Hexagonal crystals absorb the impact energy. The part flexes instead of breaking.
Where it goes
Proven in production, made for moulders.
APEX‑519 is made for injection moulding, and it is already running in parts on the market.
Proven in production
- Moulded chairs
- Laundry baskets
- Kitchen racks
- Sanitary seats
- Cable ties and seals
- Pedal bins
- Electrical fittings
- Filter‑press plates
Made for injection moulding
- 01Furniture & household
- 02Stationery & toys
- 03Sanitary ware
- 04Caps & closures
- 05Consumer white goods
- 06Packaging trays
- 07Writing instruments
- 08Automotive
- +And more
Rules for success
Five rules for first‑time‑right.
APEX‑519 works on PP’s own crystal structure, so the base resin and everything blended with it matter. Follow these five rules and get it right the first time.
- 01
Use non‑nucleated PP only
PP homopolymer or impact copolymer, non‑nucleated and non‑clarified. Never nucleated or clarified grades.
- 02
Replace up to 20% PP CP
PP homopolymer can take the place of up to 20% impact copolymer in any recipe. Above 20%, keep the extra PP CP.
- 03
Fillers: CaCO3 only
Never talc. With calcium carbonate filler or CaCO3 masterbatch, use APEX‑519 at 2% maximum.
- 04
Check for hidden nucleators
PP CP must be non‑nucleated too. Phthalocyanine blue and green colours may affect performance: trial first, or ask your supplier for an ultramarine‑based alternative. Avoid unknown regrind or recycled material, which may contain nucleated PP or talc.
- 05
Blend well, trial first
Blend thoroughly for uniform dispersion and run a small trial to confirm target properties; you may fine‑tune the recipe. Store in a cool, dry place in the original sealed bag.
Works with
- Non‑nucleated PP homopolymer
- Non‑nucleated PP impact copolymer
- CaCO3 filler, at 2% APEX‑519 maximum
- Standard colour masterbatch
Avoid
- Talc
- Clarified or nucleated PP
- Other nucleating additives
- Strongly acidic or basic additives
- Excess metal stearates
Unsure about a grade, a colour or your regrind? Ask us before your trial.
Processing at a glance
Your line as it is. No new equipment.
No new equipment and, under normal conditions, no pre‑drying. Dry blend APEX‑519 thoroughly with the base resin before feeding, and run.
- Dosage
- 1–5%
- 3% for most applications. Unfilled: start at 3%, up to 5% if required. With CaCO3: 2% max.
- Melt temperature
- 200–230°C
- Avoid prolonged residence above 250 °C.
- Mould temperature
- 30–50°C
- The upper end gives the best impact.
- Blending
- Dry blend
- Blend thoroughly with the base resin before feeding, for uniform dispersion.
Do
- Run a small batch first to confirm target properties in a simple application.
- Hold the mould a little warm (30–50 °C) during qualification.
Be careful
- Do not challenge the modifier with difficult‑to‑mould parts first. Save money in the easy parts, then move to the challenging ones.
- Do not combine with talc, clarifiers or other nucleating agents.
- Do not overheat, or hold the melt for long periods.
Specification
The data sheet, at a glance.
The key data for ASN APEX‑519. Download the full technical data sheet and the one‑page recipe guide for your team.
ASN APEX‑519Impact modifier for PP
- Form
- Pellets: round (die‑face cut) or cylindrical (strand cut)
- Colour
- White to off‑white
- Density
- 1.90 g/cc
- Test method
- ASTM D792
- Packing
- 25 kg bags
- Suggested dosage
- 1–5% by weight, 3% typical
Technical data sheet 2026PDF · 3 pages · 207 KB
Recipe guidePDF · 1 page · 769 KB
Packed in 25 kg bags. Store in a cool, dry place in the original sealed bag.
Getting startedTrial it first.
Trial it first.
Then bank the savings.
Start with one 25 kg lot in your own moulds. Once the numbers are proven on your parts, plan your supply and lock in the savings.
Step 1 · Start with a trial lot
- 01
Get a trial lot
Request a 25 kg trial lot and evaluate it in your PP moulds.
- 02
Run at 3% loading
Dry blend with your base resin; begin with simple parts.
- 03
Calculate your savings
Compare impact and recipe cost against your current blend.
Step 2 · Build your savings while building your business
- Plan your purchase volume
- Lock in your order in advance
- Allocated, assured supply
- Savings
Register your company name and book your quantity.
Register and book quantityQuestions
Before your first trial.
Straight answers from the technical data sheet and the recipe guide.
Can I use APEX‑519 with talc?
No. Never combine APEX‑519 with talc. Use calcium carbonate as your filler instead.
What about calcium carbonate?
Yes. With CaCO3 filler or CaCO3 filler masterbatch, use APEX‑519 at 2% maximum.
Does it work in nucleated or clarified PP?
No. Use non‑nucleated, non‑clarified PP homopolymer or impact copolymer only, and check the copolymer, colours and any regrind for hidden nucleators. Unsure about a grade? Ask us before your trial.
Does it work with PP impact copolymer?
Yes, with non‑nucleated PP CP. A 100% PP CP recipe can run as 97% PP CP + 3% APEX‑519, or as 17% PP HP + 80% PP CP + 3% APEX‑519.
Do I need new equipment or pre‑drying?
No new equipment and, under normal conditions, no pre‑drying. Dry blend APEX‑519 thoroughly with the base resin before feeding, run the melt at 200–230 °C and the mould at 30–50 °C.
How much should I add?
1–5% by weight of the total formulation; 3% suits most applications. In unfilled recipes start at 3% and go up to 5% if required. With CaCO3, 2% maximum. Do not exceed the recommendation: impact declines above 5%, and at 1.90 g/cc more APEX‑519 also means a heavier part.
Each customer’s use of the product may differ. Information, recommendations, test results and samples are provided in good faith, without warranty. Each customer must test the product and is responsible for its own specific use.
Request a trial lot
Double the impact. Lower the cost.
Tell us your part, base resin and filler. We will send a 25 kg trial lot of APEX‑519 and the dosing guidance for your line.