Patent ID: 7645855

Claim:
A process for preparing non-crosslinked high-functionality branched polyureas which comprises reacting one or more carbonates with one or more amines having at least two primary and/or secondary amino groups, at least one amine having at least three primary and/or secondary amino groups, wherein the average amine functionality of the amines excluding unreactive tertiary amino groups is from 2.1 to 5, comprising the steps of: (i) reacting the one or more carbonates with the one or more amines to yield condensation products (A) comprising one carbamate group and from 1 to 4 amino groups reactive with a carbamate group, or one amine group reactive with a carbamate group and from 1 to 4 carbamate groups, and (ii) reacting intermolecularly the condensation products (A) to form a polycondensation products (P) comprising both carbamate and amino groups, the polycondensation products (P) containing branching but no crosslinking.