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FSS SilDerm SQ
FSS SilDerm SQ


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Product Code: FSS30311

SilDerm SQ:
2 oz
8 oz
1 kg (2.2 lbs)


SilDerm® SQ

SilDerm® SQ is a modification of traditional Polymethylsilsesquioxane (PMSQ). Simply defined, silsesquioxane is a silicone structure where the ratio of silicone to oxygen is 1:1.5 as opposed to the 1:1 ratio seen in siloxanes. Classified as a ladder-type polymer, PMSQ is insoluble and highly resistant to heat. Traditional production methods call for the hydrolysis and condensation of methyltrialkoxysilane. That method tends to produce methanol and can produce a draggy product due to contamination with dimethoxysilane. More modern production methods are not limited by precursor contamination nor alcohol production.

SilDerm® SQ can be represented by the chemical formula [CH3SiO3/2]n[CH3Si(OH)O3/2]m. SilDerm® SQ forms a three dimensional network connected by siloxane bonds. The surface of the molecule is populated with mixed Methyl and Hydroxyl groups. By varying the ratio of these groups, the surface activity of the SilDerm® SQ can be modified. In emulsion systems SilDerm® SQ will partition at the interface helping stabilize the emulsion. In pigmented products, SilDerm® SQ will diffuse light, deliver a matte finish, preserve translucency, improve dispersability, and increase spreadability. SilDerm® SQ is an ideal additive for improving product stability or overcoming the aesthetic limitations of existing formulas.

Benefits for Using SilDerm® SQ:

• Light Diffuser

• Mattening

• Emulsion Stabilizer
• Improved Dispersion

INCI Nomenclature:


Suggested Use Levels:

Improved Texture, Dispersion Aid, Light Diffusion


White Powder

Suggested Usage Levels:


Storage: Protected from direct light and humidity at a temperature of 50°-77°F (10°-25°C)
Shelf life: 12 months, properly stored, in sealed container.

This product should be added to a formulation at the recommended usage rate.


1) Schueller, Randy and Perry, Romanowski. Beginning Cosmetic Chemistry, 3rd Edition. Practical Knowledge for the Cosmetic Industry. Allured Pub

lishing Corporation. 2009

2) Vaughan, C.D. Rice, Dennis A.; Predicting O/W Emulsion Stability by the “Required HLB Equation”; Journal of Dispersion Science and Technology; 1990.

Vol. 11 (1), pp 83 – 9

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