END-CAPPING SERVICE
Lubricants reduce friction and wear on moving parts and while natural mineral oil-based fluids represent the majority of the market, technological advances in equipment and machinery would not be possible without the benefits offered by synthetic products. One of the fastest growing synthetic lubricants is polyalkylene glycol (PAG).

PAGs are Polyalkylene Glycols – homopolymers of ethylene oxide or propylene oxide, or co-polymers of ethylene oxide or propylene oxide .
In addition, PEGs (also known as PEO and POE) – polyethylene glycol or oligomers or polymer of ethylene oxide are used as lubricant coatings for various surfaces in aqueous and non-aqueous environments. Both product ranges can benefit from end capping technology showing improved stability and functionality.

Chemoxy offer end-capping as a toll processing service.

Methyl capping converts a reactive hydroxyl (-OH) group into an unreactive ether group (-OMe). For example in the capping of polyethylene glycol monomethyl ether.

https://www.chemoxy.com/custom-processing-services/end-cappi...

The term “capping” generally refers to the alkylation of the free terminal hydroxyl groups of conventional PAGs. One classical approach involves capping a conventional PAG such as PPG mono-butyl ether with an alkyl or aryl group such as methyl or benzyl groups using a Williamson synthesis. The starting polymer precursor is usually one that already has one end of the polymer terminated with an alkyl or aryl group and its other end has a terminal hydroxyl group that is subsequently capped.

https://tinyurl.com/4xue5ta2

De Williamson-ethersynthese is een eenvoudige en veelzijdige methode om ethers te synthetiseren, en is geschikt voor de vorming van zowel symmetrische als asymmetrische ethers. De reactie is genoemd naar Alexander Williamson, die ze reeds in 1850 beschreef.[1]

https://nl.wikipedia.org/wiki/Williamson-ethersynthese