Chlorinated polyethylene advances for thermos

Chlorinated polyethylene. with its saturated backbone and polar halogen groups provides a combination of heat, ozone and oil resistance in crosslinked elastomer compounds. CM has been used in many industrial and automotive applications such as fuel- and oil-resistant hose covers, power steering hoses, oil-resistant air ducts and other demanding applications. CM can be crosslinked using peroxides or nucleophilic sulfur thiadiazole derivative systems. While TD is preferred by many end users, its broader use has been limit-ed due to inconsistent cure and poor shelf life stability. This paper discusses an improved TD cure system for use with CM elastomer compounds based on two technical innovations: improved cure consistency us-ing chelation technology and variation of the accelerators used to modify the cure rate and bin stability of the compound. The improved cure technology eliminates a major defifiency of existing TD cure technology and resuslts in more consistent cure performance and longer shelf-life of mixed compounds. The new cure technology will be illustrated by application to a new highly extendible CM product which has the ability to accept high levels of plasticizers and fillers and yet provide good physical properties and processing behavior;