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  • Hot sale Castable Polyurethane prepolymer Polyol MDI System P-MDI-100X
    Castable Polyurethane prepolymer Polyol MDI System P-MDI-100X
    Description Polyurethane prepolymer polyol MDI system Key features No irritating odor. Products have good toughness and elasticity. Excellent abrasion resistance and water resistance. Typical properties polyol MDI system P-MDI--100 P-MDI -101 P-MDI -102 P-MDI -103 P-MDI -104 P-MDI -105 Prepolymer Appearance (25℃) Waxy solid Waxy solid Waxy solid Waxy solid Waxy solid Waxy solid NCO Content(%) 5.5~6.5 6.6~7.2 7.5~8.5 5.0~6.0 6.0~6.8 7.2~8.0 Using Mixture Ratio (PHR) 5.6~6.6 6.7~7.3 7.6~8.6 5.1~6.1 6.1~6.9 7.3~8.1  Life in the Reaction Kettle (75~78℃/min) 8~10 5~7 5~7 8~10 5~7 5~7 Physical properties of finished products Hardness (Shore A) 60±5 85±5 95±5 60±5 85±5 95±5 Tensile Strength (MPa) 51.3 55.3 57.2 41.7 45.5 52.8 Tearing Strength (kN/m) 78.4 135.0 135.7 70.6 123.2 127.5 Elongation at Break (%) 516 520 498 461 577 558 Akron Abrasion (cm3/1.61km) 0.08 0.05 0.03 0.08 0.05 0.03 Application Mainly used in the production of polyurethane elastomer products with the corresponding requirements, such as a variety of industrial components, roller, rubber roller, rubber, oil seal, cushion material, plate, etc.. Usage method Can be used for manual operation, more suitable for the operation of the casting machine, chain extender are BDO and TMP, etc. Attention The prepolymer should be stored at low temperature and dry place, avoid the moisture and moisture when used After the opening of the prepolymer should be used up as soon as possible, if not exhausted with nitrogen seal. The storage period of unopened prepolymer is three months. If you want to add color paste or other materials, keep the water content below 0.1%, and consider the compatibility of additives.
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  • Polymeric MDI
    Functional Chemical PAPI: Polymeric MDI
    Description PAPI consists of pure-MDI and polymerized-MDI. It is used in applications such as rigid, semi-rigid, and integral skin foams, as well as coatings, adhesives and elastomers. Type Pure-MDI and polymerized-MDI Typical properties Item PAPI 27 PAPI 135C PAPI 135 Function 2.7 2.7 2.7 NCO Content(%) 31.4 31.4 31 NCO Equivalent 134 131.3-140.1 135.5 Molecular Weight 340 340 340 Acidity HCl (mg/Kg) 170 170 100 Viscosity (25℃) (mPa s) 150-220 180-220 150-220 Density (25℃) 1.23 1.23 1.23 Application Widely used for the production of elastomers, artificial and synthetic leather, spandex (polyurethane fibers), shoe soles, coatings, and adhesives. Storage and handling Available in 250kg/drum Store products in tightly closed original containers at 5-35℃ Shelf life: 12 months from delivery date According to non-dangerous goods transport
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  • methylene diphenyl diisocyanate

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