Shanghai Kingzhi New Materials Technology Co., Ltd. · Shanghai and Hong Kong
Teal and black polyol drums stacked in a chemical storage area

Polyurethane Elastomer and TPU Systems

Cast elastomers, rollers and TPU all come down to three components: the isocyanate, the polyol soft segment and the chain extender.

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The Process

Six Steps From Requirement to Delivered Material

This is the sequence we actually work through with a customer, not an idealised diagram.

  1. Set the Performance Target

    Dynamic load, heat build up, abrasion and tear strength decide the isocyanate. NDI is the premium choice where dynamic performance dominates.

  2. Select the Soft Segment

    Polycaprolactone polyols from 300 to 10000 molecular weight, with hydrolysis resistant and narrow distribution options.

  3. Specify the Chain Extender

    1,4-butanediol at 99.8 percent purity with water at 0.05 percent maximum, because moisture in the extender becomes bubbles in the part.

  4. Control Acid Value

    Ultra low acid value polyol grades down to 0.05 mgKOH/g where hydrolytic stability decides service life.

  5. Check Handling Temperatures

    Waxy solid and granular polyol grades need melting; liquid grades do not. Melting points are listed per grade.

  6. Plan the Packaging

    200 kg drums as standard, with IBC and bulk supply available on request for regular volumes.

Materials

Products Used in This Solution

Rows of red isocyanate drums stacked several high in a bonded warehouse
IsocyanatesNDI 1,5-Naphthalene Diisocyanate

Premium aromatic diisocyanate for high dynamic load elastomers

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Teal and black steel drums of polycaprolactone polyol stacked in a store
Polyether PolyolPolycaprolactone Polyol PCL

Diols triols tetrols and modified grades from 300 to 10000 molecular weight

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Blue and red labelled steel drums of chain extender raw material
Solvent and Chain Extenders1,4-Butanediol BDO Chain Extender

High purity BDO at 99.8 percent with matched amine catalysts

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Stacked red drums of MDI raw material in a chemical storage warehouse
IsocyanatesMDI Diphenylmethane Diisocyanate

The rigid foam and elastomer workhorse supplied as 4,4'-MDI

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Knowledge

Guides That Go Deeper

Rows of red steel isocyanate drums stacked in a bonded warehouse
GuideAromatic vs Aliphatic Isocyanates How to Choose

Aromatic isocyanates are faster and cheaper. Aliphatic isocyanates keep their colour. This guide sets out which property actually decides the choice.

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Teal polyol drums stacked next to black drums in a chemical store
GuidePolycaprolactone Polyol Selection by Molecular Weight

Molecular weight sets flexibility, hydroxyl value sets stoichiometry, and acid value quietly sets service life.

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FAQ

Questions About This Process

Do you charge for this technical support?

No. Product selection advice and formulation support are part of supplying the material, based on your application requirements, processing conditions and performance targets.

Can you supply everything in this process from one order?

Yes, where the materials are in our range. That is the main reason buyers consolidate: one purchase order, one packing list, one shipment.

What if none of your grades fit?

We will say so. Customised grades are possible through our OEM partners and specialised manufacturing facilities, and where they are not, we would rather tell you than sell you the nearest thing.

How quickly can we start?

Samples for validation take about 7 days. Mass production is 20-30 days after the deposit is received.

What are the commercial terms?

30% deposit in advance, 70% against a copy of the bill of lading. Bank transfer, Xtransfer or PayPal. All international orders carry a minimum order quantity.

Start With the Problem Not the Product Code

Describe what the material has to do and we will work back to the grade. Response within 24 hours.

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