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Solving organic chemistry problems

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Please see the attached.

Methylene diphenyl di-isocyanate (MDI) is used as an adhesive ----- it is often cross-linked with maleic anhydride when in the presence of water.

We are asked to explain and detail out the structural components of this reaction.

I have a theory 1A and theory 1B ----- my guess is that the maleic anhydride hydrolizes in water to create maleic acid. Then I think one of 2 things happens: a) the maleic acid attacks the CH2 functional group in the diagram attached......or b), it attacks the more reactive isocyanate (NCO) functional group in the diagram attached.

Can sometime please take a stab at this reaction ---- so I need an explanation and then a diagram of the by-product reaction! I really need your help!

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This solution helps solve various organic chemistry problems.

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Here is the answer. If you have any doubts or if you need more information, please let me know. I will update it.
OTA 109368
Dr. Anandhi Ray

References:

1. Influence of Carboxylic Anhydrides on Selected Mechanical Properties of Heat-cured Resin

DOI: 10.1177/00220345910700121201
J DENT RES 1991 70: 1537
A. Peutzfeldt and E. Asmussen
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