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Re: NM Guy post# 67450

Sunday, 04/23/2017 12:04:28 PM

Sunday, April 23, 2017 12:04:28 PM

Post# of 83957
Good information, NMGuy.

This area is often overlooked. Medical devices which are placed within the body during surgery contain isocyanates.

I cannot speak to the chemistry of the parts so much but to the adhesive bonds that are used in the production-that do contain isocyanates:

'Polyurethanes. Medical-grade polyurethanes are used as adhesives, encapsulants, or coatings in many medical devices. Most commercially available polyurethane systems are based on polyethers or polyesters with terminating hydroxyl functional groups. The reaction of an alcohol and an isocyanate results in the formation of a urethane, as follows:

The materials used in most polyurethane systems usually consist of one of several different formulations: di- or polyfunctional alcohols; polyhydroxy compounds (known as polyols); di- or polyfunctional isocyanates; or low-molecular-weight alcohols or amines. A general scheme for the reactions involved in the formation of a polyurethane system is as follows:

http://www.mddionline.com/article/adhesive-bonding-medical-devices

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