| abstract |
NEW MATERIAL:A compound of formula I (R 1 and R 2 are alkyl). n EXAMPLE: The compound of formula II. n USE: A crosslinking agent, comonomer, etc. capable of giving a copolymer suitable for metal adhesives by reaction with a polyfunctional organic acid compound. n PREPARATION: For example, an orthoester compound of formula II (R 5 is alkyl; R 6 WR 6 " are alkyl), e.g. an orthopropionic acid triester, is reacted with dipentaerythritol of formula III in the presence of a catalyst, e.g. sulfobutyric acid, in an inert solvent, e.g. an aromatic hydrocarbon, at 80W250°C while removing an alcohol which is a reaction by-product by evaporation. n COPYRIGHT: (C)1985,JPO&Japio |