IBond-0921 High-Grafting Anhydride PE
Engineered LLDPE functionalized polymer by Symb ChemTech featuring an elevated grafting rate (0.8–0.9%), superior flowability (1–3 g/10min), high ISO whiteness (>40%), and outstanding processing stability for demanding polyolefin formulations.
What is IBond-0921 High-Grafting Anhydride-Grafted PE?
IBond-0921 is a high-grafting anhydride-modified linear low-density polyethylene (LLDPE) functionalized compatibilizer manufactured by Symb ChemTech. Featuring an elevated grafting rate of 0.8–0.9%, a melt index of 1–3 g/10min (190°C/2.16kg), and high whiteness (>40% ISO), IBond-0921 delivers double the chemical coupling efficiency compared to standard grafted PE grades. It serves as an optimal coupling agent and interfacial modifier in low-smoke halogen-free (LSHF) flame-retardant cable compounds, wood-plastic composites (WPC), glass fiber and mineral-filled PE, PA/PE polyolefin alloys, and multi-layer polyolefin adhesion.
Technical Specifications & Physical Properties
Tested in accordance with ISO & GB standardized test protocols (Document Reference: 202606)
IBond-0921 Typical Properties Sheet
Base Polymer: Linear Low-Density Polyethylene (LLDPE)
| Property Name | Typical Value | Unit | Test Method |
|---|---|---|---|
| Density | 0.88 ± 0.05 | g/cm³ | ISO 1183 |
| Melt Flow Index (190°C / 2.16 kg) | 1 – 3 | g/10min | ISO 1133 |
| Anhydride Grafting Rate | 0.8 – 0.9 | % | Chemical Titration |
| Residual Monomer Rate | < 0.15 | % | Chemical Titration |
| Volatile Content | < 0.1 | % | ISO 1269 |
| ISO Whiteness Index | > 40 | % | GB 2913 |
Key Application Domains
By providing an enhanced density of reactive anhydride functional groups on LLDPE backbones, IBond-0921 establishes high-strength chemical bonds with polar fillers, natural fibers, and engineering resins.
LSHF Flame-Retardant Cable Compounds
Acts as a high-efficiency coupling agent in Low-Smoke Halogen-Free (LSHF/HFFR) cables, ensuring exceptional interface bonding and uniform dispersion of inorganic flame retardants like ATH or MDH.
Wood-Plastic Composites (WPC)
Bridges natural wood flour/straw fibers and hydrophobic PE matrices, dramatically reducing moisture absorption while boosting tensile strength, impact toughness, and creep resistance.
Glass Fiber & Mineral Filled PE
Enhances adhesion between PE matrices and glass fiber, talc, calcium carbonate, or mica, preventing fiber pull-out and substantially improving flexural modulus and dimensional stability.
Polyolefin / Polyamide Alloys
Functions as a reactive compatibilizer in PE/PA blends. The anhydride groups react with terminal amine groups of nylon, creating a fine dispersion and superior mechanical toughness.
Multi-Layer Adhesion & Metal Bonding
Improves polyolefin adhesion onto polar substrates including steel pipe anti-corrosion coatings, aluminum-plastic composites, and co-extruded multi-layer barrier packaging films.
Masterbatch Dispersion Aid
Enhances pigment wetting and mineral particle dispersion in concentrated color and functional polyolefin masterbatches, preventing agglomeration and boosting color yield.
IBond-0921 Formulating & Comparison Tool
Select your targeted formulation system or compare IBond-0921 (high grafting) against IBond-0920 (moderate grafting) to optimize your processing parameters.
⚙️ Extrusion & Processing Information
IBond-0921 functions as a standard polymer additive and seamlessly adapts to conventional single-screw and twin-screw extruders, internal mixers, and injection molding machinery.
- Typical processing temperature window: 150°C – 280°C.
- High melt flow index (1–3 g/10min) facilitates rapid melt homogenization.
- Fully compatible with standard polyolefin thermal stabilizers and pigments.
📦 Storage, Handling & Safety
Proper storage preserves the reactivity of the grafted maleic anhydride functional groups and prevents moisture pickup or thermal degradation.
- Store under cool, dry conditions away from direct sunlight and UV radiation.
- Protect bags from ambient moisture and elevated storage temperatures.
- Reseal packaging tightly after opening to prevent atmospheric degradation.
Frequently Asked Questions
When should I choose IBond-0921 over IBond-0920?
IBond-0921 features a higher grafting rate (0.8–0.9%) compared to IBond-0920 (0.4–0.5%). Choose IBond-0921 for formulations with high filler loadings (e.g., >60% ATH/MDH in LSHF cables, high wood flour content in WPC, or high glass fiber loadings) where stronger interfacial polar coupling and lower additive dosage are required.
How does IBond-0921 help maintain high whiteness in finished products?
Symb ChemTech utilizes a proprietary graft modification process that minimizes residual monomer (<0.15%) and thermal discoloration. IBond-0921 maintains an ISO whiteness index >40%, ensuring excellent color stability in white, natural, or light-colored polyolefin compounds.
How is the anhydride grafting rate of IBond-0921 verified?
The 0.8–0.9% anhydride grafting rate of IBond-0921 is quantitatively measured using standard acid-base chemical titration, providing consistent batch-to-batch quality control.