FAQ

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Performance materials - About isosorbide

Is POLYSORB® isosorbide a bio-based monomer?

Yes. POLYSORB® isosorbide is obtained from sorbitol, a starch derivative. Starch produced by Roquette comes mainly from maize, wheat. Thus, POLYSORB® isosorbide can be considered as bio-based.
Performance materials - Safety

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

POLYSORB® isosorbide is a bio-based monomer.

However, polymers based on isosorbide are produced with other co-monomers.

It is recommended to contact the resin manufacturer to have more information of final bio-based content of the material.
Performance materials - About isosorbide

What is a chain extender?

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

TPU special properties are highly linked to the presence of such blocks.

Performance materials - About isosorbide

What is POLYSORB® isosorbide?

POLYSORB® isosorbide is a cycloaliphatic monomer obtained from sorbitol dehydratation.

Sorbitol is a polyol obtained from glucose, the starch monomer.

Starch is the main component of plant-based raw materials such as maize, wheat,…

Performance materials - About isosorbide

Is POLYSORB® isosorbide a chain extender?

POLYSORB® isosorbide is a short chain diol. Thus, it can be used to design special TPU grades.
Performance materials - About isosorbide

What can be considered as a POLYSORB® isosorbide derivative?

POLYSORB® isosorbide has a unique diol structure that enables molecule grafting or polymerisation.

All compounds based on chemical modification of POLYSORB® isosorbide can be qualified as isosorbide derivative.

Performance materials - About isosorbide

Is POLYSORB® isosorbide suitable for polyester resin modification?

POLYSORB® isosorbide is a diol that can be used as co-monomer for polyester synthesis.
Performance materials - About isosorbide

Who is Roquette?

Roquette is a French family-owned group with an international dimension, processing maize, wheat, potatoes, peas and microalgae, all renewable raw materials. For more information, visit our website: www.roquette.com
Performance materials - About isosorbide

Is POLYSORB® ID a bio-based plasticizer?

Yes. POLYSORB® ID is designed from POLYSORB® isosorbide and plant-based fatty acids, both coming from plant-based raw materials.
Performance materials - About isosorbide

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

No. It means that the resin does not belong to the other types of resin defined from categories 1 to 6 (PET, HDPE, PVC, LDPE, PP, PS). 
Performance materials - About isosorbide

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

Isosorbide can be used to make different types of plastics/resin, so there is no specific RIC for isosorbide-based plastics.
Performance materials - Polymer performance

Are POLYSORB® isosorbide-based polymers UV resistant?

Thanks to its non-aromatic (cycloaliphatic) structure, POLYSORB® isosorbide does not introduce into polymers UV sensitive bonds, enabling higher UV resistance to plastics.

Performance materials - Polymer performance

What is the difference between standard polycarbonate and POLYSORB® isosorbide-based polycarbonate?

Standard polycarbonates are mainly composed of Bisphenol A, while by using POLYSORB® isosorbide, resin manufacturers can design special BPA-free polycarbonates.
Performance materials - Polymer performance

How can POLYSORB® isosorbide contribute to replace standard polycarbonate?

Using POLYSORB® as co-monomer in polyester resins like PET enables to create better performing materials.

With such improvement, they can pretend to be a BPA-free, safe plastic alternative to standard polycarbonate.
Performance materials - Polymer performance

What can be done to increase the glass transition temperature (Tg) of polyethylene terephthalate (PET)?

Polyethylene terephthalate (PET) glass transition temperature limits its use, notably in packagings subject to heating.

By introducing POLYSORB® isosorbide as co-monomer during the resin synthesis, PEIT (polyethylene-co-isosorbide terephthalate) resin is created. POLYSORB® isosorbide introduction boosts resin temperature resisitance, enabling the use of PEIT in new demanding packaging applications.

Performance materials - Polymer performance

What is POLYSORB® isosorbide impact on polymer glass transition temperature (Tg)?

Thanks to its original molecular design, POLYSORB® isosorbide often increase polymer Tg.

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