What Is Bis-Ppg-15 Dimethicone Ipdi Copolymer C30-50 Alkylcarbamate?
Bis-Ppg-15 Dimethicone Ipdi Copolymer C30-50 Alkylcarbamate is a specialty silicone created by linking PPG-15 dimethicone with a small ring-shaped molecule called isophorone diisocyanate, then finishing the chain with long C30-50 alkylcarbamate groups. The result is a smooth flexible polymer that feels silky on skin. Silicones like this started gaining popularity in the 1980s when formulators looked for lightweight alternatives to heavy oils. Over time chemists learned that adding polyether (the PPG part) and long alkyl tails could boost spreadability and film strength, making the ingredient even more versatile.
Production involves reacting PPG-15 dimethicone with isophorone diisocyanate under controlled heat so the ends of the silicone chains join with the diisocyanate bridge. A second step caps the reactive ends with fatty carbamate groups, which tame the chemistry and improve compatibility with other cosmetic ingredients.
Thanks to its flexible film and soft feel, you will spot this polymer in primers, long-wear foundations, tinted moisturizers, leave-on masks, anti-aging serums, sunscreens, hair smoothing creams and transfer-resistant lip colors. It helps these products glide on evenly and stay put without a greasy after-feel.
Bis-Ppg-15 Dimethicone Ipdi Copolymer C30-50 Alkylcarbamate’s Cosmetic Benefits/Uses
This ingredient earns its place in formulas by giving both performance and sensory benefits.
- Film forming: Creates a thin flexible layer on skin or hair that locks in moisture, improves product wear time and helps pigments resist smudging
- Skin conditioning: Leaves a smooth non-sticky finish that makes skin feel soft and silky while reducing the appearance of dry patches
Who Can Use Bis-Ppg-15 Dimethicone Ipdi Copolymer C30-50 Alkylcarbamate
Because this polymer is lightweight, non-greasy and generally non-comedogenic, it suits most skin types including dry, normal, combination, sensitive and even acne-prone skin. Those with very reactive skin or a known silicone allergy should proceed cautiously, as any silicone can occasionally trigger irritation in highly sensitive individuals.
The material is fully synthetic and does not rely on animal-derived components, so it is considered suitable for both vegans and vegetarians.
No specific warnings have been issued for use during pregnancy or while breastfeeding. Current safety data indicate low systemic absorption, which makes topical use unlikely to affect mother or baby. Nonetheless this is not medical advice; pregnant or nursing women should show the full ingredient list of any product to their physician to be extra safe.
Bis-PPG-15 Dimethicone IPDI Copolymer C30-50 Alkylcarbamate does not make skin more sensitive to sunlight and can even help stabilize UV filters in sunscreens, so no special sun precautions are required beyond normal daily protection.
Potential Side Effects/Adverse Reactions
Responses to topical Bis-PPG-15 Dimethicone IPDI Copolymer C30-50 Alkylcarbamate differ from person to person. The points below outline potential side effects but they are uncommon when the ingredient is used correctly in a well-formulated product.
- Mild redness or stinging in extremely sensitive skin
- Allergic contact dermatitis in rare cases of silicone or isocyanate sensitivity
- Transient eye irritation if the product migrates into the eyes
- Follicular buildup leading to temporary bumps if heavy layers are not cleansed off properly
If any unwanted reaction occurs stop using the product immediately and consult a healthcare professional for guidance.
Comedogenic Rating
Rating: 1 / 5
This silicone based polymer has a large molecular size and sits on the surface rather than sinking into pores. It forms a breathable film that helps water stay in the skin without creating the waxy plugs often linked to breakouts. The PPG portion also adds slip so it does not feel heavy or occlusive. For these reasons most dermatology sources classify it as very low risk for clogging pores.
Because of the low rating it is generally suitable for people who are prone to acne or congestion. Only those who react to any layer forming ingredient or who use very rich products on top might notice issues.
Keep in mind that overall formula design, how thoroughly you cleanse and the presence of other comedogenic ingredients can alter real world results.
Summary
Bis-Ppg-15 Dimethicone Ipdi Copolymer C30-50 Alkylcarbamate works mainly as a film former and skin conditioner. It links flexible silicone chains with polyether segments and long fatty tails to create a lightweight mesh that hugs the skin or hair. This mesh locks in moisture, smooths texture, improves spreadability and helps makeup or sunscreen stay in place longer.
While not as famous as dimethicone or cyclopentasiloxane, it is steadily gaining fans in long wear foundations, transfer resistant lip colors and leave on masks thanks to its silky feel and staying power.
Current safety data show very low irritation and almost no systemic absorption when used topically, so it is considered safe for everyday cosmetic use. As with any new skincare ingredient it is wise to do a quick patch test before adding a product containing this polymer to your routine, especially if your skin is highly reactive.