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Microcrystalline Wax Definition

20200513150035d33J

Microcrystalline wax is a refined mixture of solid, saturated hydrocarbons, mainly branched paraffin, obtained from petroleum. In contrast to paraffins, microcrystalline waxes may vary widely in character depending on the crude-oil source and the method and degree of refinement. Some are ductile, like beeswax; others are hard and brittle; and still others crumble easily during handling. Microcrystalline waxes may be made from the residue of crude petroleum by refining; or they may be made from petroleum jelly by removing the oil with a solvent. Their physical properties may be controlled by the temperature of the solvents. Methods of separation include solvent dilution, chilling, centrifuging, filtering, and various combinations of these Chemically, microcrystalline waxes consist of saturated aliphatic hydrocarbons. Microcrystalline Wax is also known as Petroleum wax.

 

Petroleum Wax Applications

Used in
1- Industries such as
– tire and rubber
– candles
– adhesives
– corrugated board
– cosmetics
– castingsUsed in custom making of jewelry and small sculptures.
2- Museum and conservation settings for protection and polishing of antique woods, ivory, gemstones, and metal objects.
3- A key component in the manufacture of petrolatum.
4- Inks, Paints and Coatings
5- Paper and Packaging
6- Personal Care
7- Polymer Additives


Petroleum Wax Characteristics

  1. Insoluble in water
  2. very slightly soluble in ethanol
  3. sparingly soluble in diethyl ether and hexane
  4. Melting Range : 62-102°C
  5. Viscosity @ 100°C : Not less than 11 cSt.
  6. Sulfur : Not more than 0.4%
  7. Arsenic : Not more than 3 mg/kg

CHARACTERISTICS

TEST METHOD

LIMITES

MELTING POINT, F

ASTM D127

170/180

MELTING POINT, C

ASTM D127

76.7/82.2

PENETRTION@ 77 f

ASTM D1321

25/35

COLOR, SAYBOLT

ASTM D 156

+16 Min.

RESIDUE ON IGNITION

NF (current revision)

0.10 Max.

ALKALINITY

NF (current revision)

PASS

ACIDITY

NF (current revision)

PASS

FIXED OILS, FATS, AND ROSIN

NF (current revision)

PASS

COLOR

NF (current revision)

PASS

ORGANIC VOLATILE IMPURITIES

NF (current revision)

PASS

VISCOSITY@210@F, SUS

ASTM D445

75/90

FLASH POINT, COC, F

ASTM D92

530 Min.

ODOR RATING, PANEL AVERAGE

LATM 93

0.8 Max.


Comparison Table of MICROCRYSTALLINE WAX & PARAFFIN WAX

PARAFFIN WAX MICROCRYSTALLINE WAX
Mainly unbranched alkanes Mainly branched alkanes
Crystalline Amorphous
Brittle Malleable
Translucent Opaque
Low melting (48 to 70ºC) Higher melting (54 to 95ºC)
Glossy Adhesive
Hard Soft
White White to Colored
Odorless Odorless

TYPES OF BITUMENS WE PROVIDE

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