Page 7 - catalog Medhim

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MICROCRYSTALLINE WAX

Description:
Microcrystalline wax is a type of wax produced by de-oiling petrolatum,
as part of the petroleum refining process. In contrast to the more familiar
paraffin wax which contains mostly unbranched alkanes, microcrystalline
wax contains a higher percentage of isoparaffinic (branched)
hydrocarbons and naphthenic hydrocarbons. It is characterized by the
fineness of its crystals in contrast to the larger crystal of paraffin wax. It
consists of high molecular weight saturated aliphatic hydrocarbons. It is
generally more viscous, denser, tackier and more elastic than paraffin
waxes, and has a higher molecular weight and melting point. The elastic
and adhesive characteristics of microcrystalline waxes are related to the
non-straight chain components which they contain. Typical
microcrystalline wax crystal structure is small and thin, making them
more flexible than paraffin wax. It is commonly used in cosmetic
formulations.

Specifications Method 75 Type 65 Cosmetics Type 80
Type 70

Solid mass from

1 Appearance Visual yellow to Solid mass from light yellow to white color

brown color

2 Drop melting point, °C ASTM D- 75 – 80 65 – 70 70 – 80 80 – 85
127

3 Congealing point, °C ASTM D- 75 – 70 58 – 630 63 – 73 73 – 78
938

4 Needle penetration mm ASTM D- 18 Max. 20 – 30 16 – 20 16 – 20
x 0.1 @ 25°C 1321

5 Viscosity mm2/s @ 100°C ASTM D- 13 – 18 13 – 18 13 – 18 13 – 18
4456

6 Color ASTM D- 4.0 Max. 1.0 Max. 1.0 Max. 1.0 Max.
1500

7 Flash point, °C ASTM D 92 250 Min. 250 Min. 250 Min. 250 Min.

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