Results 61 to 70 of about 13,053 (263)

Determination of phenylurethane and isocyanate groups in isocyanates

, 2020
Reactions of phenylurethane and isocyanate groups of arylisocyanates with secondary amines are studied by IR spectrometry and potentiometric titration. It is found that the rate of the reaction between isocyanate groups and diethylamine is nearly independent of the solvent nature.
Evtushenko Yu.M., Zaitsev B.E., Ivanov V.M.   +2 more
openaire   +1 more source

Thermal Black‐Infused Polyurethane Rigid Foams: Novel Formulations Toward Higher‐Performance and More Sustainable Insulation

Journal of Applied Polymer Science, EarlyView.
Thermal black improves polyurethane foam structure and stability. It helps the foam rise smoothly while promoting the formation of smaller, more uniform cells. The foam keeps its strength and insulation performance while reducing shrinkage. Its clean production and easy processing make it a sustainable, cost‐effective option for high‐performance ...
Mihaela Mihai, Adrien Faye, Sajjad Saeidlou, Edward Norton   +3 more
wiley   +1 more source

Isocyanates and Amines – Sampling and Analytical Procedures [PDF]

, 2004
This thesis covers sampling and analytical procedures for isocyanates (R-NCO) and amines (R-NH2), two kinds of chemicals frequently used in association with the polymeric material polyurethane (PUR).
Marand, Åsa
core  

Drug‐coated balloons: From conventional designs to next‐generation innovations in vascular therapy

BMEMat, EarlyView.
This review traces the evolution of drug‐coated balloons (DCBs) from conventional designs to next‐generation platforms. We highlight innovations in balloon engineering, coating technologies, and therapeutic agents that enhance localized drug delivery while addressing challenges in efficiency, safety, and biocompatibility for vascular and emerging non ...
Lu Zhang, Jiawei Cui, Jin Wang, Manfred F. Maitz, Rifang Luo, Yunbing Wang   +5 more
wiley   +1 more source

Metal-Free Metathesis Reaction of C‑Chiral Allylic Sulfilimines with Aryl Isocyanates: Construction of Chiral Nonracemic Allylic Isocyanates [PDF]

, 2016
We report the facile and efficient metal-free metathesis reaction of C-chiral allylic sulfilimines with aryl isocyanates. This process facilitates the room temperature construction of an array of chiral nonracemic allylic isocyanates, which are versatile
P. Andrew Evans (1460203), Rebecca L. Grange (1758892)   +1 more
core   +1 more source

Occupational Risk Exposure in Automotive Coatings Small and Medium Enterprises: Environmental Controls in the EU and USA Context

Trends in Ecological and Indoor Environmental Engineering
Background: Occupational exposure in automotive coatings manufacturing remains a major industrial health concern due to volatile organic compounds (VOCs), isocyanates, and mixed solvent aerosols generated during spraying, mixing, curing, and cleaning ...
Sergij Vambol, Oleksandr Nesterenko
doaj   +1 more source

Strain Release of 1‐Azabicyclo[1.1.0]butanes as a Gateway to Highly Functionalized Azetidines: New Strategies and Structural Motifs

Chemistry – A European Journal, EarlyView.
Over the past decade, the interest in azetidines has continuously risen, by virtue of their highly appealing pharmaceutical properties. Monocyclic, spirocyclic, and bridged azetidines can be accessed by leveraging 1‐azabicyclo[1.1.0]butanes as precursors.
Yuri Gelato, Philipp Natho, Marco Colella, Renzo Luisi   +3 more
wiley   +1 more source

isocyanates [PDF]

, 2014
Citation: 'isocyanates' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.I03269 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Synthesis and Reactivity of 3‐Aminosydnones in Cycloaddition Reactions With Alkynes

Chemistry – A European Journal, EarlyView.
The synthesis, functionalization, and reactivity as dipoles of 3‐aminosydnones have been investigated. These neglected compounds undergo smooth cycloaddition reactions with strained alkynes, leading to 1‐aminopyrazoles. ABSTRACT We present in this article the synthesis, functionalization, and properties of 3‐aminosydnones, a forgotten class of ...
Apolline Dominic, Timothée D'anfray, Guillaume Force, David‐Alexandre Buisson, Maxime Tricoire, Alexis Leblais, Davide Audisio, Frédéric Taran   +7 more
wiley   +1 more source

Iron(II) catalyzed hydrophosphination of isocyanates [PDF]

, 2017
The first transition metal catalyzed hydrophosphination of isocyanates is presented. The use of low-coordinate iron(II) precatalysts leads to an unprecedented catalytic double insertion of isocyanates into the P-H bond of diphenylphosphine to yield ...
Sharpe, Helen R., William Lewis, Lewis, William, Alexander J. Blake, Ana M. Geer, Blake, Alexander J., Deborah L. Kays, Kays, Deborah L., Geer, Ana M., Helen R. Sharpe   +9 more
core   +1 more source