www.pcimag.com/articles/104054-evonik-increases-prices-for-vestamin-ipd

Evonik Increases Prices for VESTAMIN IPD
October 15, 2017
ESSEN, Germany - Evonik is raising the prices for its isophorone diamine, offered under the brand name VESTAMIN® IPD, by 10% on a global basis.
Due to significant higher costs attributed to geographical supply and demand imbalances, this unavoidable increase will come into effect Nov. 1, 2017. All existing contracts will be honored.