Abstract: The invention relates to a process for producing a polyester resin, said process comprises the steps of (i) providing a mixture of terephthalic acid, monoethylene glycol, a polycondensation catalyst which contains antimony, a phosphorous containing stabilizer comprising a compound of the formula (I) and optionally a colour correction additive containing cobalt ions; (ii heating said mixture to a temperature of 220 to 270° C. to provide bis-hydroxyethylterephthalic acid ester; and (iii) performing polycondensation of said bis-hydroxyethylterephthalic acid ester at a temperature of between 280 and 310° C. at reduced pressure.

Abstract: The invention relates to a process for producing a polyester resin, said process comprises the steps of (i) providing a mixture of terephthalic acid, monoethylene glycol, a polycondensation catalyst which contains antimony, a phosphorous containing stabilizer comprising a compound of the formula (I) and optionally a colour correction additive containing cobalt ions; (ii heating said mixture to a temperature of 220 to 270° C. to provide bis-hydroxyethylterephthalic acid ester; and (iii) performing polycondensation of said bis-hydroxyethylterephthalic acid ester at a temperature of between 280 and 310° C. at reduced pressure.

Abstract: Process for preparing a polypropylene-based object having an increased surface energy The present invention relates to a process for preparing a polypropylene-based object having an increased surface energy, said process comprising the subsequent steps of a) providing a polypropylene resin, b) forming an object of said polypropylene resin, and c) subjecting the surface of the object to a surface energy increasing treatment step, Characterized in that the polypropylene resin comprises A) at least one secondary antioxidant of formula (I) in which n is 0 or 1, each R may be the same or different and is an unsubstituted phenyl group or a phenyl group substituted by one or two alkyl groups having from 1 to 12 carbon atoms, and X is a residue of a monofunctional or difunctional phenyl group, diphenyl group, diphenyl ether group or dibenzofuranyl group and/or of formula (II)

Abstract: The present invention relates to the manufacture of polyethylene based wall articles with improved color and processing conditions, which can be surprisingly reached by the use of a specific combination of stabilizers.