Polyethylene Glycol (PEG) Esters

What polyethylene glycol (PEG) esters are

PEG esters are fatty-acid esters of polyethylene glycol: PEG oleates, stearates, laurates, cocoates and similar grades described by PEG molecular weight and by mono- or diester. They are nonionic emulsifiers, solubilisers, thickeners and dispersing agents. Dyna Glycols manufactures them by esterifying PEG with the named fatty acid to agreed SAP, hydroxyl value, acid value, melting behaviour and pH.

Low molecular-weight PEG esters (PEG 200–600) tend to be liquid emulsifiers and solubilisers. PEG 4000 or 6000 stearates are waxy and are used as thickeners, pearlising partners and high-melting emulsifiers. Monoester-rich grades are more hydrophilic; diesters are more lipophilic. The same plant that makes PEG itself can supply the ester, so chain length and residual PEG can be controlled together.

How Dyna Glycols manufactures polyethylene glycol (PEG) esters

Polyethylene glycol of the specified molecular weight is esterified with oleic, stearic, lauric, palmitic or coconut fatty acid. Process control covers conversion, residual acid, mono/di ratio, colour and water. QA uses SAP and hydroxyl value as identity tests.

Customers may specify PEG-8 oleate, PEG-40 stearate, PEG-100 stearate or an industrial equivalent. Catalogue names vary; the reliable specification is PEG molecular weight, fatty acid, and mono versus di.

Typical grades in this range

Identify PEG molecular weight, fatty acid and ester type. Custom combinations are routine.

• PEG oleates, stearates, laurates, palmitates and cocoates
• Liquid esters on PEG 200–600
• Waxy esters on PEG 1000–6000, including PEG-100 stearate types
• Mono- and diester cuts with agreed SAP and hydroxyl value

Where polyethylene glycol (PEG) esters are used

Personal care uses PEG-100 stearate with glyceryl stearate as a self-emulsifying cream base, and PEG-40 stearate as a solubiliser or O/W emulsifier. Wash products use selected PEG esters as thickeners or co-surfactants.

Agro EC/EW, textile auxiliaries, paints and industrial cleaners use PEG esters as nonionic emulsifiers, especially where a fatty acid ethoxylate is specified as an ester rather than as a direct acid ethoxylate. High-mole PEG stearates disperse pigments and waxes.

If the customer wants a PEG-free claim, use glyceryl esters or polyglycerates instead. PEG esters are chosen when ethoxylated ester performance is required.

How to specify polyethylene glycol (PEG) esters

State PEG molecular weight, fatty acid, mono/di preference, SAP or hydroxyl target, melting range and colour. For cream systems, name the co-emulsifier (often glyceryl stearate) so the pair can be sampled together.

If matching a competitor PEG-40 or PEG-100 stearate, attach SAP, hydroxyl and drop point from that TDS.

Quality, documents and supply

Lots are released against SAP, hydroxyl, acid value, water, pH, colour and appearance. SDS and COA follow verification. Samples support emulsification, thickening and freeze–thaw tests.

Warm waxy grades until uniform. Keep moisture away from PEG esters; they are hygroscopic. Follow the SDS.

Practical notes on polyethylene glycol (PEG) esters

Hydroxyl value distinguishes monoester-rich from diester-rich PEG esters. Both may share a trade-style name; always check the COA numbers.

PEG esters can hydrolyse in strong alkali. They are more stable than some short-chain esters but should still be stored dry and used within a sensible pH window.

PEG-100 stearate is not a substitute for a fatty alcohol ethoxylate of HLB 15. It is an ester thickener/emulsifier. Choose the chemistry that the formula actually needs.

Dyna Glycols manufactures both PEG and PEG esters. Ordering both from one source simplifies viscosity matching of the PEG backbone.

Odour and colour of oleate esters depend on the oleic acid and on finishing. Pale cream grades should specify colour and a maximum acid value.

For a first sample, PEG molecular weight + stearic or oleic acid + intended cream or solubiliser duty is enough to select a close catalogue ester.

Ordering and evaluating polyethylene glycol (PEG) esters

Dyna Glycols supports polyethylene glycol (PEG) esters with laboratory samples, current SDS, TDS and COA from the Kandla SEZ manufacturing network. Tell us the intended application, the substrate, the required moles or molecular weight, and any limits on colour, odour, cloud point, hydroxyl value, pH or residual feedstock. A matching catalogue grade of polyethylene glycol (PEG) esters in the Esters family can then be confirmed, or a custom batch can be planned on the ethoxylation, esterification or related plant.

When you evaluate polyethylene glycol (PEG) esters, send the competitor grade if one exists, the bath or emulsion conditions, and the tests your receiving laboratory will run. Pack options for polyethylene glycol (PEG) esters typically include drums, IBCs and bulk where the viscosity and melting point of the selected grade allow safe handling from the Esters manufacturing line.

A first order of polyethylene glycol (PEG) esters is easier when the purchase specification lists identity tests, not only a local trade name. Hydroxyl value, saponification value, acid value, cloud point, pH, water, colour and appearance are the numbers the Kandla QA laboratory can lock. If your QC uses a different solvent or a different cloud-point electrolyte for polyethylene glycol (PEG) esters, write that method on the order so the COA speaks the same language.

Custom lots of polyethylene glycol (PEG) esters are quoted after the hydrophobe or acid/alcohol pair, the target analytical window, the annual volume and the pack. Pilot batches are available when a catalogue point in the Esters range is close but not exact. Once a trial lot is approved, that TDS should be frozen so the tenth delivery of polyethylene glycol (PEG) esters matches the first approved drum.

Storage of polyethylene glycol (PEG) esters should follow the SDS: keep containers closed, protect hygroscopic grades from moisture, and warm high-melt or high-mole grades until uniform before sampling. FIFO rotation protects colour and odour. If a drum of polyethylene glycol (PEG) esters has frozen or separated in transit, homogenise it before charging a batch; do not decant only the liquid layer.

Application advice for polyethylene glycol (PEG) esters is given against the process you describe, not as a universal recipe. Share machine type, temperature, pH, electrolytes, fibre or hide type, and any ban on APEO, formaldehyde or food-contact lists. Dyna Glycols can then sample polyethylene glycol (PEG) esters alone or as a pair with a sister grade from the same Esters family so compatibility is checked in one evaluation.

Documentation for polyethylene glycol (PEG) esters is issued after a short verification of the company and the exact grade name. SDS covers handling; TDS covers typical properties; COA covers the shipping lot. If a customer audit needs extra tests on polyethylene glycol (PEG) esters (for example residual feedstock, peroxide, formaldehyde or a pharmacopoeia-style identity), list those tests at the enquiry stage so they are built into release rather than added after dispatch.