What Is Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer?
Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer is a plant-derived polymer created by linking together two smaller building blocks: diglycerin modified with isononanoic acid and dilinoleic acid from natural oils. The result is an oil-loving yet skin-friendly ingredient that behaves like a lightweight liquid wax. The cosmetic industry began exploring polyglyceryl-based esters in the early 2000s as gentler, eco-minded options to replace traditional synthetic emulsifiers. By combining them with fatty acids such as dilinoleic acid, chemists produced a versatile copolymer that boosts texture and skin feel while staying biodegradable.
Manufacturing starts with glycerin from vegetable sources. Two glycerin units are joined to form polyglyceryl-2, which is then reacted with isononanoic acid to add softness and spreadability. Separately, linoleic acid from plant oils is dimerized, turning it into a more substantial fatty acid. The two pieces are then polymerized together in a controlled, solvent-free process, producing a clear to slightly hazy liquid that is easy to work with at room temperature.
You will most often find Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer in leave-on and rinse-off skin care, hair conditioners, cleansing balms, solid oil sticks, sun care lotions and makeup such as cream foundations or lip products. Formulators like it because it can replace silicones, improve spread, and give a silky, non-greasy finish.
Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer’s Cosmetic Benefits/Uses
This multi-tasking polymer offers several perks that help products feel pleasant and perform well
- Binding: Helps keep solid and semi-solid formulas, like balm cleansers or sticks, from crumbling so the product holds together during use
- Emulsion Stabilising: Supports oil and water to stay mixed, preventing separation over time which keeps creams and lotions smooth and uniform
- Hair Conditioning: Coats hair fibers with a light, flexible film that boosts softness and shine without weighing strands down
- Skin Conditioning: Leaves a silky after-feel, reduces moisture loss and can make skin feel supple and comfortable
Who Can Use Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer
This ingredient is generally well tolerated by all skin types. Dry and normal skin enjoy its light occlusive effect that helps lock in moisture, while sensitive skin benefits from its mild nature and lack of common irritants. Combination and oily skin can usually use it too since the polymer feels lighter than many natural oils, though those who are extremely acne prone might prefer low amounts in leave-on products.
The material is synthesized entirely from plant-derived glycerin and fatty acids so it is suitable for vegans and vegetarians. No animal raw materials or by-products are involved in its production.
Current safety data show no specific cautions for pregnancy or breastfeeding. Because each pregnancy is unique this is not medical advice and anyone who is expecting or nursing should have a doctor review their full skincare routine for peace of mind.
Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer is not known to cause photosensitivity and will not make skin more reactive to sunlight. It also carries no fragrance of its own so it is unlikely to clash with scent sensitivities.
Potential Side Effects/Adverse Reactions
Individual responses to topical ingredients can differ. The points below list potential side effects but most people will not notice any problems when the ingredient is used at appropriate levels in a well-formulated product.
- Mild redness or irritation in those with extremely reactive skin
- Allergic contact dermatitis in rare cases of specific fatty acid sensitivity
- Temporary clogged pores or small breakouts on highly acne-prone skin if the formula is very rich
- Eye discomfort if the product accidentally enters the eyes
- Build-up on hair leading to a weighed-down feel when used in heavy leave-in conditioners without proper cleansing
If any irritation or other negative reaction occurs stop use immediately and consult a healthcare professional or dermatologist.
Comedogenic Rating
Rating: 1 out of 5. Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer is a large, branched molecule that sits on the skin surface and is unlikely to sink deep into pores. It spreads thinly and forms a breathable film rather than a waxy plug, which lowers the chance of blocked pores compared with heavier plant butters or mineral oil. Its composition of polyglyceryl esters and dimerized fatty acids is generally viewed as low risk for comedones in standard use levels of 1-10% in finished formulas.
Because of this low score most acne-prone users can tolerate the ingredient, especially in rinse-off or lightweight leave-on products.
As with any oil-derived raw material, the final product’s full recipe and texture also matter. Very rich balms that pair this copolymer with other occlusives could still feel too heavy for oily skin so evaluate the formula as a whole.
Summary
Polyglyceryl-2 Isononanoate/Dimer Dilinoleate Copolymer binds solid formulas, stabilises emulsions, conditions hair and softens skin by forming a flexible, lightweight film that locks in moisture without greasiness. It achieves this thanks to its dual nature: the polyglyceryl backbone attracts a bit of water while the fatty acid chains love oil, allowing it to sit at the interface of oil and water and keep everything homogenous.
The ingredient enjoys modest popularity, mainly among clean beauty and indie brands that want a plant-based substitute for silicones. You will not spot it in every lotion on the shelf yet its use is growing as formulators look for biodegradable texture enhancers.
Current safety data show it to be low risk with minimal irritation or sensitisation reports, suitable for all life stages including pregnancy. As with any new cosmetic product, a quick patch test is wise before fully incorporating it into your routine just to be safe.