Ashland, Inc.

Pertti Hietakari

Karri Airola

Mikael Skrifvars

Jukka Estamo

Jukka Tulisalo

The present invention relates to multifunctional macromers, to a method for the manufacture thereof and to their use in unsaturated polyester resins as additives to improve mechanical properties of preparations manufactured thereof. The process for the manufacture of multifunctional macromers comprises the following steps: a) reacting a polycarboxylic acid with 2 to 4 carboxylic groups, preferably 3 to 4 carboxylic groups, with glycidyl (meth)acrylate or allyl glycidyl ether, the amount of glycidyl (meth)acrylate or allyl glycidyl ether being at least one mol of glycidyl (meth)acrylate or allyl glycidyl ether per free carboxylic group of formed macromer, and b) reacting the product from step a) with an unsaturated, aromatic or aliphatic anhydride in an amount sufficient to esterify part or all of the free hydroxyl groups of the product from step a).

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Piteå, Sweden

Pertti Hietakari