Results 31 to 40 of about 134,814 (297)

Application of isocyanate-based materials in asphalt pavement: A review

Journal of Road Engineering
Isocyanate and its products are playing an increasingly important role in the high-performance development of asphalt pavement, but researchers have always focused on polyurethane (PU), one of the isocyanate products, and neglected the other roles of ...
Xing Gong, Quantao Liu, Haiqin Xu, Huan Wang, Shaopeng Wu   +4 more
doaj   +1 more source

Sustained Release Drug Delivery Applications of Polyurethanes

Pharmaceutics, 2018
Since their introduction over 50 years ago, polyurethanes have been applied to nearly every industry. This review describes applications of polyurethanes to the development of modified release drug delivery.
Michael B. Lowinger, Stephanie E. Barrett, Feng Zhang, Robert O. Williams   +3 more
doaj   +1 more source

Polyurethanes from Direct Organocatalytic Copolymerization of p-Tosyl Isocyanate with Epoxides.

Angewandte Chemie, 2020
The direct copolymerization of p -tosyl isocyanate (TSI) with epoxides, initiated by onium salts in the presence of trialkylborane, to produce polyurethanes is reported.
Mingchen Jia, N. Hadjichristidis, Y. Gnanou, Xiaoshuang Feng   +3 more
semanticscholar   +1 more source

Isocyanate toughened pCBT: Reactive blending and tensile properties

eXPRESS Polymer Letters, 2013
Cyclic butylene terephthalate oligomers (CBT) were reacted in a ring-opening polymerization with three types of isocyanates: a bifunctional aromatic type, a bifunctional aliphatic type and a polymeric aromatic isocyanate.
T. Abt, M. Sanchez-Soto, A. Martinez de Ilarduya, J. J. Bou   +3 more
doaj   +1 more source

UV Laser-Induced Photodecomposition of Matrix-Isolated Salicylhydroxamic Acid: Identification of New Isocyanate Complexes

Molecules
Photochemical reactions of salicylhydroxamic acid were induced using tunable UV laser radiation followed by FTIR spectroscopy. Four pairs of co-products were experimentally found to appear in the photolysis: C6H4(OH)NCO⋯H2O (1), C6H4(OH)C(O)N⋯H2O (2 ...
Magdalena Sałdyka, Zofia Mielke
doaj   +1 more source

Modeling of Isocyanate Synthesis by the Thermal Decomposition of Carbamates

Computation, 2020
The presented work is devoted to isocyanate synthesis by the thermal decomposition of carbamates model. The work describes the existing isocyanate-obtaining processes and the main problems in the study of isocyanate synthesis by the thermal decomposition
Ratmir Dashkin, Georgii Kolesnikov, Pavel Tsygankov, Igor Lebedev, Artem Lebedev, Natalia Menshutina, Khusrav Ghafurov, Abakar Bagomedov   +7 more
doaj   +1 more source

Bio-based light-healing isocyanate-free polyurethanes derived from carbonated soybean oil and coumarin

Green Chemistry Letters and Reviews, 2023
In response to environmental concerns and restrictions on isocyanate-based materials, researchers and the coatings industry are focused on developing eco-friendly isocyanate-free polyurethanes.
Karteek Boga, Nikhil Rambharosh Dhore, Aruna Palanisamy, Antonio F. Patti, John C. Warner, George P. Simon, Kei Saito   +6 more
doaj   +1 more source

Renewable natural resources as green alternative substrates to obtain bio-based non-isocyanate polyurethanes-review

Critical reviews in environmental science and technology, 2019
Commercially available polyurethanes are synthesized by the polyaddition of diisocyanates with polyols and low molecular weight chain extenders. A new approach to polyurethanes synthesis is realized via non-isocyanate routes.
Kamila Błażek, J. Datta
semanticscholar   +1 more source

Synthesis of 2-Azetidinones via Cycloaddition Approaches: An Update

Reactions
The present review is a comprehensive update of the synthesis of monocyclic β-lactams via cycloaddition reactions. According to the IUPAC definition of cycloaddition, both elementary and stepwise processes (formal cycloadditions) have been considered ...
Franca Maria Cordero, Donatella Giomi, Fabrizio Machetti   +2 more
doaj   +1 more source

Method of neutralizing the corrosive surface of amine-cured epoxy resins [PDF]

, 1982
The corrosive alkaline surface layer of an epoxy resin product formed by the curing of the epoxy with an aliphatic amine is eliminated by first applying a non-solvent to remove most or all of the free unreacted amine and then applying a layer of a ...
Lee, S. Y.
core   +1 more source