Is POLYSORB® isosorbide suitable for polyester resin modification?

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Does the "7" resin identification code on plastic mean they contain POLYSORB® isosorbide?

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

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

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What can be considered as a POLYSORB® isosorbide derivative?

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