Specialty Polyols are hydroxyl containing chemicals that can react with isocyanates to form urethane linkages or with epoxies and can act as toughening agents to produce high performance composites.  TRiiSO distributes a wide range of specialty polyols, including polyether polyols, polyester polyols, and high performance PTMEG, polycaprolactone, &polycarbonate polyols for use in composite applications. Click for quote or sample.

Your TRiiSO Technical Sales Representative is available to assist you in the selection of the appropriate polyol that will provide the specific properties you are trying to obtain.


Specialty Polyols Products
With regards to polyurethane linkages, there are several key characteristics which define what performance properties a  polyol will impart in a given polyurethane composite.  These characteristics include:  the hydroxyl number or hydroxyl value  (OH value), OH equivalent weight, molecular weight, and the functionality of the polyol.

Hydroxyl number (OH ) is the measure of the hydroxyl group content of gram of polyol.  Hydroxyl value is measured by titrating a known mass of polyol against potassium hydroxide (KOH), and is expressed as mg KOH/g.  Lower hydroxyl values indicates lower hydroxyl content and a higher molecular weight for the overall polyol.

OH equivalent weight is the number of grams of a given product that contains one equivalent of  hydroxyl groups (NCO).  Equivalent weight = 56100/OH

Molecular Weight is determined by multiplying the equivalent weight by the polyol functionality

Polyol functionality refers to the number of OH groups per  molecule.  Increasing the number of OH groups results in greater crosslinking.  Greater crosslinking yields stiffer, harder products with enhanced chemical and thermal resistance.  Polyols that contain 2 hydroxyl groups are called diols, polyols with 3 functional groups are called triols, polyol groups with 4 hydroxyl groups are called tetrols.

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