| These polyglycol allyl methyl ethers or polyglycol diallyl ethers contain one or two functional groups (double bond). Consequently they can be referred to as "reactive glycol diethers".
The glycol chain not necessarily only consists of polyethylene glycol. It is also possible to make random or block ethylene- and propylene glycol copolymers or polymers based only on polypropylene glycol. Popular products are based on pure ethylene glycols and random EO/PO copolymers.
Clariant markets these products under the name "Polyglycol AM" or "Polyglycol AA". The A stands for the allyl group at one end and the M stands for the methyl or second allyl group on the other end of the polyglycol chain.
For most applications, these products are reacted with siloxanes to obtain the so called polyether modified siloxanes (silicones). This hydrosilylation reaction is a Pt (platinum) catalyzed reaction. The double bond of the polyether is reacted with the Si-H bond of the siloxane (see below). |