Preparation of new blocked diisocyanate for dental application

Document Type

Article

Publication Date

1-1-1987

Abstract

A novel two‐stage method of preparing 2‐hydroxyethyl methacrylate (HEMA) and methoxyphenol or cholorophenol blocked 2,4‐tolylene diisocyanate (TDI) was devised. The first stage reaction of TDI with HEMA was carried out in petroleum ether heterogeneously with the precipitation of the intermediate product, monoadduct, in the reaction solution, and followed by a second stage homogeneous reaction of monoadduct with the blocking agent, chlorophenol, or methoxyphenol, in ethyl acetate. In both reactions the inhibitor, chloranil, and the catalyst, dibutyltin dilaurate, were used. A total of eight products were achieved. Results of elemental analyses of these products along with their LC chromatograms, NMR, and IR spectra indicated that these materials were indeed the compounds expected. Testing results of these materials as dental adhesives will be reported in a separate paper. Copyright © 1987 John Wiley & Sons, Inc.

Identifier

0023294770 (Scopus)

Publication Title

Journal of Polymer Science Part A Polymer Chemistry

External Full Text Location

https://doi.org/10.1002/pola.1987.080250214

e-ISSN

10990518

ISSN

0887624X

First Page

607

Last Page

615

Issue

2

Volume

25

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