English term (edited): adduct (in contesto)

composto ottenuto per addizione

Adduct

An adduct (from the Latin adductus, "drawn toward") is a product of a direct addition of two or more distinct molecules, resulting in a single reaction product containing all atoms of all components, with formation of two chemical bonds and a net reduction in bond multiplicity in at least one of the reactants. The resultant is considered a distinct molecular species. Examples include the adduct between hydrogen peroxide and sodium carbonate to give sodium percarbonate, and the addition of sodium bisulfite to an aldehyde to give a sulfonate.

Quindi:
intermedi di addizione del prepolimero di poliisocianato

Io la leggo così:
Il prepolimero di poliisocianato forma dei composti intermedi (di addizione/per addizione) di tipo aromatico e eterociclico


Epoxy resins reacted with an excess of polyamine yields an adduct, a polymer with amine functionality, which has certain advantages over aliphatic polyamines. Adducts can be made from both solid and liquid epoxy resins. These adducts are used in heavy-duty coatings as curing agents for epoxy resin-based coatings.

http://www2.mst.dk/common/Udgivramme/Frame.asp?http://www2.m...

Prendila con le pinze, non ne sono sicura.