The present invention relates to a binder composition comprising an
aliphatic polyester polymer: an ethylenebisamide wax; and a guanidine
wetting agent. The composition may also contain an additive which
accelerates or extends debinding of the binder composition, and to a
method for forming a sintered part by powder injection molding, including
the steps of forming a green composition comprising a binder and an
inorganic powder, wherein the binder is a composition comprising an
aliphatic polyester polymer, an ethylenebisamide wax, and a guanidine
wetting agent, and may further include an additive which accelerates or
delays completion of debinding of the binder; melting the composition;
injecting the composition into a mold for a part; heating the part to a
temperature at which the binder decomposes; heating the part to a
temperature at which the inorganic powder is sintered.
