Polypropylene Epoxy Resin
Description
Technical Parameters
Targeted Bonding Performance: Lap shear strength to pure PP and reinforced PP (glass fiber/mineral filled) reaches 28-35MPa, 40% higher than conventional epoxy resins. It is also compatible with other plastics (PE, ABS, PC) and metals, glass, enabling multi-material composite bonding.
All-Scenario Durability: After curing, the Tg value ranges from 85-125℃, withstanding high-low temperature cycles from -40℃ to 120℃. It exhibits excellent resistance to common industrial/civil chemicals such as engine oil, antifreeze, and detergents, and is waterproof and moisture-proof, meeting outdoor and humid environment requirements.
Flexible Process Adaptability: Supports room-temperature curing (25℃/24h) and medium-temperature accelerated curing (80℃/1h). Viscosity can be customized (50-500Pa·s): low-viscosity models for gap filling, high-viscosity models for structural bonding. Suitable for brushing, dispensing, potting, and other processes.
Stable Processing Performance: Working life after mixing (25℃) is 40-60 minutes, facilitating mass production. Curing shrinkage rate <1.5%, preventing deformation and cracking of PP substrates due to stress shrinkage, ensuring product dimensional accuracy.
Product Specifications
| Parameter Category | Parameter Name | Specification |
|---|---|---|
| Basic Information | Color | Black, white, gray, red, yellow, blue, green, etc. |
| Resin Characteristics | Resin Characteristics | Easy to mold; High hardness; Relatively brittle; General precision with an accuracy of 0.05mm |
| Liquid State Properties | Liguid Viscosity (25℃) | 300 - 500MPa·s |
| Liquid Density (25℃) | 1.05 - 1.25g/cm³ | |
| Mechanical Properties | Flexural Modulus | 1000 - 1500 MPa |
| Flexural Strength | 49 - 80MPa | |
| Tensile Strength | 42 - 62Mpa | |
| Tensile Modulus | 2000 - 2500MPa | |
| Elongation at Break | 15% - 17% | |
| Notched Impact Strength | 20 - 49j/m, etc. | |
| Shore Hardness | 90 - 95D | |
| Thermal Properties | Glass Transition Temperature | 78℃ |
| Heat Distortion Temperature | 80℃ | |
| Coefficient of Thermal Expansion | 95±5×10⁻⁶, etc. | |
| Shrinkage Properties | Volumetric Shrinkage | 3.83 - 2.95% |
| Linear Shrinkage | 0.8 - 1.5% | |
| Storage & Curing | Optimal Storage Temperature | 20℃ - 25℃ |
| Curing Wavelength | 355nm - 455nm, etc. |
Polypropylene Epoxy Resin application
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Automotive Manufacturing
Repair of PP bumper cracks, bonding of interior door panels and frames, sealing of PP components in engine compartments; replacing traditional mechanical connections to reduce weight.
Home Appliance Production
Splicing of PP casings for washing machines/refrigerators, sealing of PP air ducts in air conditioners, fixing of small appliance handles to PP main bodies, improving assembly efficiency.
Packaging & Daily Necessities
Leak-proof sealing of PP plastic container joints, reinforcement of storage box buckles, bonding of PP pipe interfaces, enhancing product durability.
Industrial Maintenance
Repair of damaged PP equipment casings, bonding of PP conveyor belt joints, reducing equipment maintenance costs.
Selection Guide
| Application Scenario | Recommended Features | Notes |
|---|---|---|
| Room-temperature PP structural bonding | Room-temperature curing, medium viscosity | Clean oil/dust from substrate surface; no sanding needed |
| PP component fixing in high-temperature environments | High-Tg models (≥110℃) | Match with high-temperature curing agent to ensure temperature resistance stability |
| Large-area PP coating protection | Low viscosity, self-leveling | Apply in two coats to avoid sagging |
| Outdoor PP product bonding | Weather-resistant modified | Confirm additional UV resistance indicators |
FAQ
1.Do I need to sand or etch PP substrates before use?
No complex pretreatment is required. Simply wipe the substrate surface with anhydrous ethanol to remove oil and dust before direct application. Modified components penetrate the weak boundary layer of PP, achieving molecular-level bonding and greatly simplifying processes.
2.Can it bond glass fiber-reinforced PP (FR-PP)? Will strength be affected?
Fully compatible with FR-PP. For models with 15%-30% glass fiber content, lap shear strength still reaches over 25MPa, meeting structural load requirements. The bonding layer also buffers interface stress concentration caused by glass fibers.
3.Can the working life meet mass production needs? Can it be customized to be longer?
Standard models have a 40-60 minute working life (25℃), meeting most mass dispensing/coating needs. Customizable working life (30-120 minutes) is available, but curing speed needs to be adjusted accordingly. Contact our technical team for formula optimization.
4.Can bonded components withstand high temperatures in automotive engine compartments?
High-Tg models (Tg≥110℃) can withstand long-term high temperatures of 120℃ and short-term peak temperatures of 150℃, fully suitable for bonding and fixing PP sensors, wire harness brackets, and other components in engine compartments.
5.Does the product comply with RoHS standards? Can test reports be provided?
The entire product series complies with EU RoHS 2.0 standards, with halogen content <900ppm. Third-party authoritative test reports (e.g., SGS) can be provided to support import and export compliance requirements.
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