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A chain extender is a short chain diol used in polyurethanes and polyurethane-based thermoplastics (TPU) to create hard blocks.

TPU’s special properties are highly linked to the presence of such blocks, and POLYSORB® isosorbide can be used as a chain extender in replacement of the commonly used 1,4-butanediol.

Other questions - About Isosorbide

Does the 7 RIC (resin identification code) on plastic mean it contains POLYSORB® isosorbide?

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What is the resin identification code (RIC) for isosorbide-based plastics?

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What can be considered as a POLYSORB® isosorbide derivative?

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Are POLYSORB® isosorbide-based polymers considered bio-based?

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Is the higher heat resistance when using POLYSORB® isosorbide also valid in aromatic systems?

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Is POLYSORB® isosorbide also a linear chain extender?

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What are the USPs when compared directly to 1.4BDO?

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