Maro Publications

Polyurethanes (PUR)

Notes

*11/26/2013 
from 6/28/2012

Maro Topics

Comments

Patent Abstracts

Patent Titles

Polymers

Polyurethane (PUR) Adhesives

Polyurethane Coatings

Polyurethane Composites

Polyurethane Copolymers

Polyurethane Foams

Polyurethane Implants

Polyurethane Materials

Polyurethane Nanocomposites

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Notes

A polyurethane (PUR and PU) is polymer composed of a chain of organic units joined by carbamate (urethane) links. Polyurethane polymers are formed by combining two bi- or higher functional monomers. One contains two or more isocyanate functional groups (with formula N=C=O) and the other contains two or more hydroxyl groups (with formula OH). The alcohol and the isocyanate groups combine to form a urethane linkage:

 ROH + R'NCO → ROC(O)N(H)R' (R and R' are alkyl or aryl groups)

This combining process, sometimes called condensation, typically requires the presence of a catalyst. More complicated monomers are also used.

Polyurethanes are used in the manufacture of flexible, high-resilience foam seating; rigid foam insulation panels; microcellular foam seals and gaskets; durable elastomeric wheels and tires; automotive suspension bushings; electrical potting compounds; high performance adhesives; surface coatings and surface sealants; synthetic fibers (e.g., Spandex); carpet underlay; and hard-plastic parts (i.e., for electronic instruments). Polyurethane is also used for the manufacture of hoses and skateboard wheels as it combines the best properties of both rubber and plastic.

(Wikipedia, Polyurethanes, 6/28/2012)

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Interested!!
Bookmark this page to follow future developments!.
(RDC 6/5/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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* Date of latest addition; date of first entry is 6/28/2012.