Polyolefin Wax"VISCOL", "SANWAX"

We were the first company in Japan to succeed in the industrialization of synthetic waxes. We manufacture and sell  low molecular weight polypropylene ("VISCOL") and  low molecular weight polyethylene ("SANWAX").

"VISCOL" and "SANWAX" have a wide molecular weight distribution unique to thermal decomposed polyolefin waxes and exhibit the following characteristics.

• Excellent pigment dispersion
• High softening point, high crystallinity
• Low viscosity, enabling improved flowability of resins and hot melt adhesives
• Low polarity and improved mold release
• Also compatible with resins other than polyolefins such as PC, ABS, PBT, etc.

1. Good compatibility with polyolefin resins.
2. Has the same softening point and hardness as polyolefin resins (higher softening point and higher crystallinity than natural waxes)
3. It has a melt viscosity similar to natural waxes such as mineral and petroleum-based waxes.
4. This is a pyrolyzed(thermally decomposed) polyolefin wax, resulting in a wide molecular weight distribution.
5. Compatible with resins other than polyolefins (PC, PBT, ABS, etc.)
6. The industrial process of polyolefin thermal decomposition is more suitable for small-lot production than the polymerization-type industrial process and can be finely tailored to various needs.

Test procedure 

Color number: Hazen method (*Gardner method), Melting point: DSC method, Melt viscosity: 160°C (*140°C), Molecular weight: High temperature GPC method

Test procedure

Color number: Hazen method, Melting point: DSC method, Melt viscosity: 140°C, Molecular weight: High temperature GPC method

Addition of polyolefin wax reduces resistance (torque) when PVC and stearate are melt-blended.

Test conditions

PVC : 100wt%, Stearic acid Calcium stearate: 2.5wt%, Zinc stearate: 1.0wt% , Dioctyl tin Malate polymer: 0.5wt%, Lubricant: 0.3-1.0wt Melt-kneaded using a lab-plast mill (temperature of mixer: 180°C) Mixer temperature: 180, 190, 200°C (mixer temperature: 180, 190, 200°C, screw speed: 50 rpm). 

• The addition of polyolefin wax improves the melt-flow of PBT resin.
• Melt-flow inprovement is achieved with a low additive amount, which minimizes reduction in resin chemical properties 

Specimen preparation conditions

Polybutylene terephthalate (PBT) resin pre-dried at 130°C for 3 hours and "SANWAX 161-P" (0.5 wt%) were mixed in a twin-screw extruder (250°C) and injection molded (molding temperature: 250°C, mold temperature: 50°C) to produce test specimens.

Test conditions

Shear viscosity: Capillary rheometer method (240°C, 608/sec) Tensile test: ASTM D638, Flexural test: ASTM D790.

Specimen preparation conditions

Long glass fiber/PP resin pellets (glass fiber content: 30 wt%) were dry-blended with "VISCOL" and injection molded (molding temperature: 250°C, mold temperature: 50°C) to prepare test specimens for tensile and flexural tests.

Test conditions 

Spiral flow length: Long glass fiber/PP resin pellets (glass fiber content: 30 wt%) were dry-blended with "VISCOL", injected into a spiral flow mold (Archimedes spiral), and the flow length was measured. (molding temperature: 230°C, mold temperature: 50°C, injection pressure: 30 kgf/cm2, mold flow channel width: 6 mm, channel thickness: 3 mm), Surface smoothness: Ra value was measured using a laser microscope. Tensile test: ASTM D638, Bend test: ASTM D790.