Abstract: The invention relates to a process for transforming amino- or hydroxyl-containing materials of plant seed origin into plastics feedstocks, which comprises(a) reacting amino-containing starting materials of plant seed origin with an oxo compound, optionally also with an amino compound, preferably with urea or melamine, simultaneously or subsequently; or(b) reacting hydroxyl-containing starting materials of plant seed origin with an amino compound in an aqueous medium, and optionally reacting the thus-obtained macromolecule with an oxo compound; or(c) reacting hydroxyl-containing starting materials of plant seed origin with an oxo compound in an aqueous medium, optionally reacting the thus-obtained macromolecule with an amino compound,then transforming the obtained macromolecular material into plastics feedstocks in a known way.

Abstract: Copolymers having elastomeric properties are prepared by the polymerization of olefinic monomers with catalysts of modified Ziegler-Natta type, wherein a mixture of isobutylene and butadiene is used as olefinic monomer.The process renders possible the preparation of elastomeric copolymers from cheap raw materials, such as the C.sub.4 -fraction formed by the pyrolysis of gasoline.