Hydrogenated polyisobutene

Hydrogenated polyisobutene (CAS 68937-10-0) is a fully saturated synthetic hydrocarbon polymer produced by hydrogenating polyisobutene to eliminate residual unsaturation.

Where is Hydrogenated polyisobutene used?

• Personal care: skin-conditioning emollient in lip products, color cosmetics and skin creams
• Industrial lubricants: base fluid or additive in gear oils, compressor fluids and metalworking compounds
• Adhesives and sealants: plasticizer controlling tack, flexibility and low-temperature performance
• Plastics compounding: processing aid and softener that improves flexibility without migrating out of the finished part
• It also functions as an emollient, plasticizer and lubricant base.
• In cosmetics and personal care products, it increases the thickness of the lipid (oil) portion.
• Used for pigment dispersion in many cosmetic products.

Good to know: Offers oxidative stability that unsaturated alternatives cannot match; thermal and oxidative resistance are critical to service life in industrial applications.

Formulation notes

• Recommended use level is 3 to 40%.
• In creams or lotions, the emulsifier system and oil-phase balance should be assessed because oil-phase changes can affect viscosity, appearance and physical stability.
• Widely used as a substitute for squalene in cosmetics.

Typical specification

• Supplied in liquid form.
• Various grades exist depending on molecular weight, ranging from very light and non-greasy to more viscous.
• High molecular weight grades act as a waterproofing and fixing agent.
• Low molecular weight grades have properties similar to squalane, such as restoring skin elasticity and preventing insensible water loss.

Regulatory status

• The INCI name is Hydrogenated Polyisobutene.
• Classifies under HS code 3902.20 (polyisobutylene).

Storage, packaging and handling

• Should be stored in compatible, tightly closed containers under the supplier's recommended conditions, avoiding contamination during handling.
• Supplied in drums and totes for manufacturing use.

Frequently asked questions about Hydrogenated polyisobutene

What functions does hydrogenated polyisobutene perform in sunscreens and makeup?

It is used as a waterproofing agent in sunscreens or makeup products and helps preserve SPF after water exposure in sunscreens.

Can hydrogenated polyisobutene replace mineral oil or silicones in formulations?

It is used as a substitute for mineral oil or silicones in some formulations.

What role does hydrogenated polyisobutene play in hair care and deodorants?

In hair care it is used to maximize scalp moisturization and reduce frizz and tangles; in deodorants it binds other ingredients and provides smooth application.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.