MDI Based PTMEG System Microcellular Polyurethane with Good Hydrolysis Resistance and High Strength for Automotive Suspension Jounce Bumper
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Product Description
MDI Based PTMEG PU System For Microcellular Polyurethane (MC-PU) For Manufacturing Automotive Suspension Jounce Bumper
Key Characteristics
- Good hydrolysis resistance
- High strength performance
Applications
- Marine fender
- Shock absorption mat
Typical Properties of PU Matrix
| Product Name | Appearance | Viscosity (mPa*s/40℃) | Density (g*cm⁻³/40℃) | Package Specification (kg) |
|---|---|---|---|---|
| A-1170 | Liquid | 600~1000 | 1.01~1.02 | 190 |
| B-6003 | Yellowish transparent liquid | 500~700 | 1.08~1.2 | 225 |
Materials Preheating Requirements
- A-1170: Preheat at 60~70℃ for 8~12 hours
- B-6003: Preheat at 60~70℃ for 8~12 hours
Typical Processing & Reaction Parameters
| Test Item | Parameter Value |
|---|---|
| A/B Raw Material Temperature (℃) | 30~35 / 35~40 |
| Mix Ratio (by weight) | A + 40g XC-2 + H₂O : B = 100 : 103~105 |
| Cream Time (s) | 8~10 |
| Foam Peak Temperature (℃) | 60~70 |
| Free Rise Density (g/cm³) | 0.30~0.35 |
| Mold Temperature (℃) | 35~45 |
| Demold Time (min) | 7~9 |
Auxiliary Material Addition Dosage
- XC-2: 2.85Kg ± 0.5Kg per 190kg A-1170
- Deionized Water: 0.3Kg ± 0.1Kg per 190kg A-1170 (adjust according to actual production)
Overall Molded Physical Properties Range
| Item | Index Range |
|---|---|
| Molded Density (g/cm³) | 0.50~0.70 |
| Hardness (Shore A) | 70~90 |
| Tear strength (kN/m) | 29.5~44.5 |
| Tensile strength (MPa) | 8.0~11.0 |
| Elongation (%) | 335~450 |
Physical Properties Before Hydrolysis Test
Test Specimen: 6mm thick sheet
| Item | Test Result |
|---|---|
| Density (g/cm³) | 0.6 |
| Hardness (Shore A) | 80 |
| Elongation (%) | 350 |
| Tear strength (kN/m) | 37.8 |
| Tensile strength (MPa) | 8.3 |
Physical Properties After 7 Days Hydrolysis Aging
Test Specimen: 6mm thick sheet
Hydrolysis Test Condition: 80℃, 95% relative humidity
| Item | Test Result |
|---|---|
| Density (g/cm³) | 0.6 |
| Hardness (Shore A) | 75 |
| Elongation (%) | 396 |
| Tear strength (kN/m) | 37.0 |
| Tensile strength (MPa) | 8.2 |
Physical Properties After 14 Days Hydrolysis Aging
Test Specimen: 6mm thick sheet
| Item | Test Result |
|---|---|
| Density (g/cm³) | 0.6 |
| Hardness (Shore A) | 70 |
| Elongation (%) | 412 |
| Tear strength (kN/m) | 35.9 |
| Tensile strength (MPa) | 8.0 |
Shelf Life
| Material Model | Shelf Life |
|---|---|
| A-1170 | 6 Months |
| B-6003 | 6 Months |
| XC-2 | 6 Months |
| XC-100 | 6 Months |
Important Notes
- All data listed in this document are for reference only
- Final technical indicators shall be subject to actual production test results
- Please contact our technical team if customized physical performance requirements are needed
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Qingdao Exceed Fine Chemicals Co.,Ltd
Location
Room 602, Building No. 9, Guoxin Haichuang Industrial Park, No. 50 Binhai Road, Jimo District, Qingdao, Shandong, China. 266000
Contact Person
Louis.liu