Grafted Polymers
Compatibilizer Supplier
Compatibilizer Series
As a compatibilizer supplier, SYCHEM TECH produces SY series compatibilizers — maleic anhydride (MAH) grafted polymers engineered to bridge the gap between immiscible polymer systems. By enhancing interfacial adhesion between the matrix resin and fillers, fibers, or alloy components, they deliver measurable improvements in tensile strength, impact resistance, and surface quality — critical for automotive, appliance, and industrial compounding applications.
Product Introduction
SY-HA is maleic anhydride grafted polypropylene with high functional group content. It exhibits excellent reactive activity, high fluidity, and ease of processing. Mainly used in glass fiber reinforced PP, mineral-filled PP, and PP alloys with polar resins. Applications include automotive parts, home appliances, furniture, and more.
Typical Properties
| Physical Properties | Test Method | Unit | SY-HA |
|---|---|---|---|
| Base Resin | — | — | PP-H |
| Functional Group Content | Company Std. | MAH wt% | High (>0.8%) |
| Melt Flow Rate (190°C/2.16kg) | ISO-1133 | g/10min | 90-135 |
| Density | ISO-1183 | g/cm³ | 0.90-0.93 |
Product Introduction
SY-LV is maleic anhydride grafted polypropylene featuring high reactive activity and low VOC characteristics. Primarily used as an interfacial modifier for glass fiber or mineral-filled polypropylene. Widely applied in PP product fields with strict odor requirements, such as automotive interior components.
Typical Properties
| Physical Properties | Test Method | Unit | SY-LV |
|---|---|---|---|
| Base Resin | — | — | PP-B |
| Functional Group Content | Company Std. | MAH wt% | High (>0.8%) |
| Melt Flow Rate (190°C/2.16kg) | ISO-1133 | g/10min | ≧ 55 |
| Density | ISO-1183 | g/cm³ | 0.89-0.91 |
| Odor Level | PV3900 | — | 3.0 |
Product Introduction
SY-AC and SY-AD are maleic anhydride grafted ABS. They can be used as interfacial modifiers for glass fiber reinforced or mineral-filled ABS, or as compatibilizers for PC and ABS blends. Both grades feature high MAH functional group content for excellent reactive performance.
Typical Properties
| Physical Properties | Test Method | Unit | SY-AC | SY-AD |
|---|---|---|---|---|
| Base Resin | — | — | ABS | ABS |
| Functional Group Content | Company Std. | MAH wt% | High (>0.8%) | High (>0.8%) |
| Melt Flow Rate (200°C/5kg) | ISO-1133 | g/10min | 1.2-4.5 | 0.6-2.8 |
| Density | ISO-1183 | g/cm³ | 1.02-1.07 | 1.04-1.08 |
Product Introduction
SY-AE is a multicomponent copolymer of polybutadiene rubber, styrene, acrylonitrile, and maleimide monomers. It is mainly used as a compatibilizer for PA and ABS alloy materials, improving the toughness of the alloy while enhancing its rigidity.
Typical Properties
| Physical Properties | Test Method | Unit | SY-AE |
|---|---|---|---|
| Base Resin | — | — | ABS |
| Functional Group Content | Company Std. | MAH wt% | — |
| Melt Flow Rate (265°C/10kg) | ISO-1133 | g/10min | 22-42 |
| Density | ISO-1183 | g/cm³ | 1.04-1.08 |
Product Introduction
SY-PW is maleic anhydride grafted polyethylene (HDPE base). Mainly used in plastic powders, electrostatic spraying, and wood-plastic composites. It effectively improves the interfacial compatibility between PE and fillers, allowing for uniform filler dispersion.
Typical Properties
| Physical Properties | Test Method | Unit | SY-PW |
|---|---|---|---|
| Base Resin | — | — | HDPE |
| Functional Group Content | Company Std. | MAH wt% | High (>0.8%) |
| Melt Flow Index (190°C/2.16kg) | ISO-1133 | g/10min | ≧ 0.8 |
| Density | ISO-1183 | g/cm³ | 0.93-0.97 |
Product Introduction
SY-PX and SY-PZ are maleic anhydride grafted polyethylene (LLDPE / M-LLDPE base). They can be used for toughening PA, compatibilizing PE with polar resins (e.g. PA/PE alloys), and exhibit excellent bonding properties with strong adhesion to metals and polyolefins. Applications include electrostatic spraying, wood-plastic composites, halogen-free cable compounds, and asphalt waterproofing additives.
Typical Properties
| Physical Properties | Test Method | Unit | SY-PX | SY-PZ |
|---|---|---|---|---|
| Base Resin | — | — | LLDPE | M-LLDPE |
| Functional Group Content | Company Std. | MAH wt% | High (>0.8%) | High (>0.8%) |
| Melt Flow Index (190°C/2.16kg) | ISO-1133 | g/10min | ≧ 0.5 | 1.2-3.8 |
| Density | ISO-1183 | g/cm³ | 0.91-0.95 | 0.91-0.93 |
Looking for Custom Formulation Support?
As your compatibilizer supplier, our technical team can help you select the optimal grade based on your specific resin system, filler type, and processing conditions.
Contact Us for Technical SupportYour Compatibilizer Supplier in China
SYCHEM TECH is a compatibilizer supplier based in Shenyang, China, producing the SY series of maleic anhydride (MAH) grafted PP, PE, and ABS compatibilizers for glass-fiber and mineral-filled compounds, polymer alloys, wood-plastic composites, and halogen-free cable. As your formulation development partner, we match the right base resin, graft level, and melt flow to your system and advise on dosage (typically 3–10%). For background, see the overview of maleic anhydride grafting.
Need help choosing a grade? Tell us your matrix resin, filler or alloy, and processing window, and our team will recommend the right SY compatibilizer and arrange samples. Explore the parent grafted polymers hub, our toughening agents, and the full functional additives range.
Further reading: What is a compatibilizer and how does it work? explains how compatibilizers act at the polymer interface, the main types and typical dosage. Unsure whether a blend needs better adhesion or more impact strength? See compatibilizer vs toughening agent: key differences. Working with polypropylene? Our guide to compatibilizers for PP covers grade selection, dosage and troubleshooting for glass-fiber, mineral-filled and PP/PA compounds. Or browse all our technical guides.
Compatibilizers for compounds: SY grade selection guide
Choose compatibilizers for compounds by the matrix resin first, then by the filler, fiber or second polymer. The table maps common systems to our SY series grades and the reference dosage shown on each grade card above. Start in the middle of the range and adjust to your strength, impact and flow targets.
| Compound | SY grade | Why it fits | Reference dosage |
|---|---|---|---|
| Glass-fiber or mineral-filled PP | SY-HA | MAH-grafted homopolymer PP, high MAH (>0.8%), MFR 90–135 | 3–5% |
| Low-odour PP for automotive interiors | SY-LV | MAH-grafted block-copolymer PP, PV3900 odour 3.0 | 3–5% |
| PP/PA and other PP alloys with polar resins | SY-HA | Reacts with PA amine end groups at the interface | 3–5% |
| Glass-fiber or mineral-filled ABS, PC/ABS blends | SY-AC, SY-AD | MAH-grafted ABS, high MAH (>0.8%) | 3–5% |
| PA/ABS alloys | SY-AE | Rubber–styrene–acrylonitrile–maleimide copolymer; adds toughness and rigidity | 5–10% |
| PE powders, electrostatic spraying, PE wood-plastic composites | SY-PW | MAH-grafted HDPE for filler dispersion | 2–10% |
| PA/PE alloys, halogen-free cable, bonding to metals | SY-PX, SY-PZ | MAH-grafted LLDPE / mLLDPE; also toughens PA | 3–10% |
For polypropylene in detail (fiber sizing, filler level, odour and troubleshooting), read compatibilizers for PP.
Compatibilizer FAQ
What is a compatibilizer in polymers?
A compatibilizer is a polymer additive that makes two materials that do not mix, such as PP and glass fiber or PP and nylon, bond at their interface. One part of the compatibilizer molecule is like the matrix resin; the other part, usually grafted maleic anhydride (MAH), is polar and bonds to the filler, fiber or second polymer. Better adhesion turns into higher tensile and impact strength and a finer, more stable blend morphology. Our guide what is a compatibilizer explains the main types.
How do MAH-grafted compatibilizers work?
The polyolefin or ABS backbone of the compatibilizer mixes into the matrix, while the anhydride groups react with amine end groups of polyamide, or form hydrogen bonds and chemical bonds with the silanol and hydroxyl groups on glass fiber, minerals and wood flour. The compatibilizer sits at the interface and transfers load from the matrix to the reinforcement. That is why graft level (MAH content) and melt flow matter as much as the base resin.
Which compatibilizers are used for PP?
For glass-fiber and mineral-filled PP and for PP/PA alloys, MAH-grafted homopolymer PP such as SY-HA is the standard choice at 3–5%. For automotive interiors with odour limits, use a low-odour grade such as SY-LV. See compatibilizers for PP for dosage by glass-fiber level and troubleshooting.
How much compatibilizer should I add?
Typical loadings are 2–10% of the compound. Our reference dosages are 3–5% for SY-HA, SY-LV, SY-AC and SY-AD, 5–10% for SY-AE, 2–10% for SY-PW and 3–10% for SY-PX and SY-PZ. Run a control and three dosage levels, then choose the lowest level where tensile and impact strength stop improving, since excess compatibilizer can lower stiffness and heat resistance.
What is the difference between a compatibilizer and a coupling agent?
A coupling agent, such as a silane, is a small molecule applied to the surface of glass fiber or a mineral. A compatibilizer is a polymer added to the melt that bonds to both the matrix and the filler or second polymer. In glass-fiber PP both are used together: the silane sizing on the fiber and a PP-g-MAH compatibilizer in the compound.
Is a compatibilizer the same as a toughening agent?
No. A compatibilizer improves adhesion between phases; a toughening agent raises impact strength. Some grafted polymers do both, for example MAH-grafted LLDPE in PA. Read compatibilizer vs toughening agent or see our toughening agents.
How do I choose a compatibilizer and get samples?
Tell us your matrix resin, the filler, fiber or second polymer and its loading, your property targets and your processing conditions. As a compatibilizer supplier, we will recommend an SY grade and starting dosage, email the TDS and arrange samples. Contact our team or write to info@sychemtech.com.