Colour Tone Masterbatch: Colouring technology for PVC

Colour Tone Masterbatch has been granted a patent on its Vynacol colouring technology, described as ‘the world’s first and only polymer-specific colour masterbatch that makes it as easy to colour PVC as any other plastic material’. The company says that traditional ways of colouring uPVC such as liquid colour, wax dispersions, or universal and flexible PVC-based masterbatches introduce additional components into the compound which may present processing difficulties and/or lead to product failure through plasticiser migration or changes in physical properties. Universal masterbatches may be unsuitable in uPVC because the carrier lubricates the compound while masterbatches based on flexible PVC contain plasticisers, which are inappropriate when the target is to make a rigid compound.

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