What Is Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer?
Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer is a lab-crafted polymer made by linking together butylene glycol, dilinoleic acid and isophorone diisocyanate, then capping the chain with benzyl alcohol. The result is a large, flexible molecule that spreads easily over skin and dries to form a soft, invisible film. It was first explored by cosmetic chemists looking for a lighter replacement for heavy waxes and oils. Because the raw materials are common in skincare science, suppliers were able to scale up production quickly, and the ingredient has been used in lotions and makeup since the early 2000s.
The copolymer is produced through controlled polymerization. The individual building blocks are reacted in precise ratios, heat is applied, and the growing chains are terminated with benzyl alcohol to give the finished material its smooth touch. After purification the polymer is delivered as a liquid or soft resin that blends well into water-based or oil-based formulas.
Today you will find Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer in lightweight moisturizers, long-wear foundations, sheet mask essences, sunscreens, hair styling creams and even some peel-off masks where a flexible film is desired.
Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer’s Cosmetic Benefits/Uses
This multitasking polymer improves both the feel of a product and how it performs on skin.
- Film forming: Creates a breathable layer that locks in moisture, helps makeup stay put and gives sunscreens better water resistance
- Skin conditioning: Leaves skin feeling smooth and soft without a greasy residue, adding a light cushiony finish to creams and serums
Who Can Use Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer
This ingredient is considered friendly for most skin types. The lightweight film it forms helps dry skin hold onto moisture while its non greasy texture does not overwhelm oily or combination skin. Sensitive skin generally tolerates it because it is chemically stable and free of known irritants, though those with a history of polymer allergies should stay alert.
Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer is made entirely from synthetic building blocks so it contains no animal derived materials. That makes it acceptable for both vegetarians and vegans.
The polymer is not known to penetrate deeply or disrupt hormones, so formulators view it as low risk for pregnant or breastfeeding women. This is not medical advice and anyone who is expecting or nursing should still clear new products with a doctor first to be safe.
The ingredient is not photosensitizing, meaning it will not make skin more prone to sunburn. It also plays well with common actives like vitamin C, niacinamide and retinoids because it sits on top of the skin rather than reacting with them.
Potential Side Effects/Adverse Reactions
Reactions to topical Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer differ from person to person. The points below outline potential side effects, but most users will not notice any problems when the ingredient is included at normal cosmetic levels.
- Mild irritation or tingling
- Redness on very sensitive or compromised skin
- Rare allergic contact dermatitis in individuals already sensitized to similar polymers
- Temporary clogged pores if used in an occlusive, heavy formula on acne prone skin
If any of these issues occur stop using the product and seek guidance from a healthcare professional or dermatologist.
Comedogenic Rating
Rating: 1/5 – Laboratory and in-use data show the polymer forms a lightweight breathable film that does not fully seal pores or create a heavy oily layer. Its large molecular size keeps it on the skin surface, limiting its ability to mix with sebum. Reports of breakouts are rare and usually tied to the overall formula rather than the copolymer itself.
Because of this low score it is generally considered suitable for people who are prone to acne or clogged pores.
The only caveat is that the ingredient can boost the water resistance of sunscreens and long-wear makeup. In very rich or occlusive formulations that already contain waxes or high levels of silicones, the combined film could feel heavier and potentially trap debris, so product context matters.
Summary
Bis-Benzyl Butylene Glycol/Dilinoleic Acid/Ipdi Copolymer is chiefly valued for two things: it forms a flexible film that helps lock in moisture and improve wear time, and it conditions skin so formulas feel silky rather than greasy. It accomplishes this by staying on the surface, spreading evenly then drying to a soft network that moves with the skin.
The ingredient is not exactly a household name but it has a steady presence behind the scenes in modern moisturizers, foundations, sunscreens and sheet masks where brands want a lightweight yet long-lasting finish.
Overall safety data are strong. It is non irritant for most users, vegan friendly and free of known hormone effects. As with any new cosmetic, do a small patch test the first time you try a product containing this copolymer to make sure your skin agrees with the full formula.