Assertion: acetaldehyde | /r/CapableOf | reduce additive
Facets:
value: from melt polymerization
type: OTHER
Source sentences:
text: 5,656,221 discloses the production of molded polyesters articles having low acetaldehyde via addition of an acetaldehyde reducing additive and molding directly from melt polymerization.
text: b) adding an acetaldehyde reducing additive to said polyester to form a reduced acetaldehyde polyester; and
text: If the polymer is pelletized the acetaldehyde reducing additive may be added prior to pelletization or after remelting.
text: Specifically, a preferred embodiment of the process of the present invention provides an improved "melt-to-mold" process in which polyester polymers or copolymers are prepared in the melt phase to an I.V. value of greater than about 0.5 dL/g; an acetaldehyde reducing additive is added to the polymer melt and then the melt is fed directly from the polycondensation reactor to at least one molding or shaping machine.
text: Integrated processes which produce PET articles with low acetaldehyde but do not disclose the addition of acetaldehyde reducing additives have also been disclosed.