Abstract: The invention discloses a concentrate comprising polymethylpentene and titanium dioxide, a process for preparing polyester-based preforms and containers, a use of said concentrate, and a container product. The concentrate of the invention comprises 20-90% polymethylpentene, and 10-80% titanium dioxide, based on the weight of the concentrate.

Abstract: The invention discloses a preform for a container comprising a polyester, titanium dioxide, and a light absorbing additive. In addition, a process for preparing a polyester-based container from such a preform is disclosed, as well as a polyester-based container obtainable by such a process. The opaque containers can for instance be used for storing light-sensitive solids and/or liquids. The optical properties of the preform result in improved properties during blow-moulding processes.

Abstract: The invention discloses a concentrate comprising cyclic olefin polymer and titanium dioxide, a compound formulation, a process for preparing coloured polyester, a process for preparing polyester-based containers, and a container product. The concentrate of the invention comprises 10-90% by total weight of the concentrate of cyclic olefin polymer, and 20-80% by total weight of the concentrate of titanium dioxide.

Abstract: The invention discloses a concentrate comprising polymethylpentene and titanium dioxide, a process for preparing polyester-based preforms and containers, a use of said concentrate, and a container product. The concentrate of the invention comprises 20-90% polymethylpentene, and 10-80% titanium dioxide, based on the weight of the concentrate.

Abstract: The invention is directed to a film of preform for a bottle, to a polyester composition suitable for preparing a film or preform for a bottle, and to the use of certain organic esters as slip agent for specific polyesters. The film or preform according to the invention comprises a polyester material selected from the group of polyethylene terephthalate, virgin bottle grade polyethylene terephthalate, postconsumer polyethylene terephthalate, polyethylene terephthalate glycol-modified (PETG), polyethylene naphthalate, polybutylene terephthalate, and polylactic acid and at least one slip agent, said slip agent being an ester of an aliphatic alkanol having the formula R—OH, wherein R stands for a branched chain alkyl group having 12-18 carbon atoms, and an aliphatic fatty acid having the formula R1—COOH, wherein R stands for a straight chain alkyl group having 11-21 carbon atoms, and wherein the slip agent is liquid at 25° C.

Abstract: The invention is directed to an oxygen scavenging additive system for polymers, said additive system comprising an oxidisable polymer, a transition metal catalyst and a fatty acid ester of trimethylolpropane, wherein the fatty acid is a C6 to C18 fatty acid having a linear or branched chain, to polyester compositions containing said additive and to containers, or preforms for containers, prepared from said polyester composition.

Abstract: The invention is directed to a concentrate comprising a liquid carrier material and at least one additive for a polymer or polymer blend, wherein the liquid carrier material is a fatty acid ester of trimethylolpropane, wherein the fatty acid is a C6 to C16 fatty acid having a linear or branched chain, oleate or isostearate, and wherein the additive is more specifically a colourant, such as a dye or pigment.