aliphatic isocyanurates and polyisocyanurate networks

(PDF) Aliphatic isocyanurates and polyisocyanurate networks

Sep 01, 2016 · Aliphatic isocyanurates and polyisocyanurate networks. September 2016; Polymers for Advanced Technologies; ALIPHATIC ISOCYANURATES AND POLYISOCYANURATE NETWORKS. Polym. Adv. Technol.

Aliphatic isocyanurates and polyisocyanurate networks - CORE

The production, processing, and application of aliphatic isocyanate (NCO)-based thermosets such as polyurethane coatings and adhesives are generally limited by the surprisingly high viscosity of tri-functionality and higher-functionality isocyanurates. These compounds are essential crosslinking additives for network formation. Aliphatic isocyanurates and polyisocyanurate networks Oct 01, 2017 · The production, processing, and application of aliphatic isocyanate (NCO)-based thermosets such as polyurethane coatings and adhesives are generally limited by the surprisingly high viscosity of tri-functionality and higher-functionality isocyanurates.

Aliphatic isocyanurates and polyisocyanurate networks

Oct 01, 2017 · Title:Aliphatic isocyanurates and polyisocyanurate networks:Published in:Polymers for Advanced Technologies, 28(10), 1299 - 1304. Wiley. ISSN 1042-7147. Aliphatic isocyanurates and polyisocyanurate networks Rijksuniversiteit Groningen founded in 1614 - top 100 university. Sluiten. Menu en zoeken; Contact; My University; Student Portal

Aliphatic isocyanurates and polyisocyanurate networks

Title:Aliphatic isocyanurates and polyisocyanurate networks:Published in:Polymers for advanced technologies, 28(10), 1299 - 1304. Wiley. ISSN 1042-7147. Aliphatic isocyanurates and polyisocyanurate networksaliphatic isocyanurates and (3) to further react model isocyanurates into densely crosslinked polyisocyanurate networks and characterize the physical and thermal properties of the resulting materials. To investigate the viscosity characteristics of functional (network-forming) isocyanurates, a series of model diisocyanates

Aliphatic polyisocyanurate-urethanes for paper coatings

Jan 01, 1988 · Aliphatic polyisocyanurate-urethanes for paper coatings 483 1 TMHDI where at 120the tensile strength was higher by about 20% than the corresponding experi- ment without its addition. The flame-resistant coatings obtained through the use of the diols, NPGDB and TBBA, with HDI and TMHDI monomers showed a strong lowering in tensile strength Aliphatic polyisocyanurate-urethanes for paper coatings Jan 01, 1988 · Aliphatic polyisocyanurate-urethanes for paper coatings 483 1 TMHDI where at 120the tensile strength was higher by about 20% than the corresponding experi- ment without its addition. The flame-resistant coatings obtained through the use of the diols, NPGDB and TBBA, with HDI and TMHDI monomers showed a strong lowering in tensile strength

Catalysts for Producing Isocyanurates from Isocyanates

1. A process for producing isocyanurates and isocyanurate-containing polyurethanes comprising reacting an isocyanate in the presence of a catalyst, wherein:the catalyst comprises the product of the reaction of a thiol group containing carboxylic acid with an alkali metal, alkaline earth metal, scandium-group or lanthanoid base, wherein the reaction is performed in the absence of compounds Cyclotrimerization of diisocyanates toward high Aliphatic isocyanurates are nowadays used routinely in the development of advanced materials like polyurethane nanocomposites and 3D-printed components, due to their versatile reactivity and the

EP0047452B1 - Process for the preparation of isocyanurates

EP0047452B1 EP81106727A EP81106727A EP0047452B1 EP 0047452 B1 EP0047452 B1 EP 0047452B1 EP 81106727 A EP81106727 A EP 81106727A EP 81106727 A EP81106727 A EP 81106727A EP 0047452 B1 EP0047452 B1 EP 0047452B1 Authority EP European Patent Office Prior art keywords isocyanate groups catalyst process used mixture Prior art date 1980-09-09 Legal status EP0047452B1 - Process for the preparation of isocyanurates EP0047452B1 EP81106727A EP81106727A EP0047452B1 EP 0047452 B1 EP0047452 B1 EP 0047452B1 EP 81106727 A EP81106727 A EP 81106727A EP 81106727 A EP81106727 A EP 81106727A EP 0047452 B1 EP0047452 B1 EP 0047452B1 Authority EP European Patent Office Prior art keywords isocyanate groups catalyst process used mixture Prior art date 1980-09-09 Legal status

High temperature-resistant polyisocyanurate foams

The present invention relates to a polyisocyanurate foam obtainable by reacting a mixture in the presence of a catalyst and optionally an initiator, comprising or consisting of:A) a polyisocyanate component comprising at least one aliphatic polyisocyanate;B) a component reactive to isocyanate comprising at least one polyol and/or an alcohol and also optionally an amine;C) at least one blowing Investigation on the intermolecular interactions in Apr 15, 2019 · Non-functional aliphatic isocyanurates were also included to study systems capable of RR contacts only. For each molecule, the ring geometric centre is the most convenient choice as reference point, and it was used to calculate the intermolecular ring-ring pair correlation function g(r) on systems equilibrated at 298.15 K and 1 atm .

METHOD FOR PRODUCING POLYISOCYANATES OF (CYCLO)ALIPHATIC

Aliphatic isocyanates are those which comprise exclusively linear or branched chains, i.e., acyclic compounds. The isocyanurates present are, in particular, trisisocyanatoalkyl and/or trisisocyanatocycloalkyl isocyanurates, which constitute cyclic trimers of the diisocyanates, or are mixtures with their higher homologs containing more than Microporous Polymer Networks Made by Cyclotrimerization The cyclotrimerization of commercial, aromatic diisocyanates allows for the formation of monolithic, microporous polymer networks with SBET surface areas up to 13001500 m2/g. The process has been up-scaled for production of 100 g batches. The monolithic materials show a promising potential for the removal of lipophilic components from aqueous mixtures.

On the Versatility of Urethane/Urea Bonds:Reversibility

Aliphatic isocyanurates and polyisocyanurate networks. P. J. Driest, V. Lenzi, L. S. A. Marques, Reprocessable polyhydroxyurethane networks exhibiting full property recovery and concurrent associative and dissociative dynamic chemistry via transcarbamoylation and reversible cyclic PhD Defence Piet Driest Poly(urethane-isocyanurate Jan 31, 2020 · In this work, we investigate the synthesis and material properties of aliphatic PUI networks as well as their potential application in a biomedical context. In the first part of this thesis (chapters 3 and 4), the viscosity of liquid aliphatic isocyanurates is investigated.

Poly(urethane-isocyanurate) Networks

Table of Contents Chapter 1 General Introduction:Scope, Aims and Outline of this Thesis 10 Chapter 2 Poly(urethane-isocyanurate)s:Chemistry, Network Formation and Applications 18 Chapter 3 Aliphatic Isocyanurates and Polyisocyanurate Networks 50 Chapter 4 The Influence of Molecular Interactions on the Viscosity of Aliphatic Polyisocyanate Precursors Shape Memory Superelastic Poly(isocyanurate-urethane network via reaction of soluble oligomers in the pores with the active functional groups on the nanoparticles.4749 Upon deswelling during drying, that continuous secondary layer of polymer pulls the particle network together, causing collapse into a more or less dense plastic. Clearly, there is a need for a

Siloxane-containing polyisocyanurate - The Dow Chemical

May 20, 1986 · The polyisocyanurate of this invention, particularly that made with an aliphatic polyisocyanate often exhibits substantial heat resistant at temperatures as high as 350° C. or more. In addition the polyisocyanate is highly resistant to most organic StructureProperty Relations in Oligomers of Linear Oligomerization reactions of aliphatic diisocyanates, exclusively involving NCO groups are discussed. The reactivity and selectivity of these reactions are dependent on chain length, reaction conditions, and the catalyst employed. The resulting oligomers (dimers and trimers) sometimes deviate considerably from expectation with respect to the structure and properties. The synthesis

The Formation of the Polyisocyanurate Networks Structure

(1993). The Formation of the Polyisocyanurate Networks Structure. International Journal of Polymeric Materials and Polymeric Biomaterials:Vol. 19, No. 1-2, pp. 117-125. The Formation of the Polyisocyanurate Networks Structure (1993). The Formation of the Polyisocyanurate Networks Structure. International Journal of Polymeric Materials and Polymeric Biomaterials:Vol. 19, No. 1-2, pp. 117-125.

The Isocyanurates. II. The Syntheses of Several

The Isocyanurates. II. The Syntheses of Several Unsaturated Aliphatic Isocyanurates Tanimoto Fumio 1, Tanaka Takatomi 1, Kitano Hisao 1, Fukui Kenichi 1. 1 Department of Fuel Chemistry it formed black solid mass, suggesting a polyisocyanurate structure of a low molecular weight. Triallyl isocyanurate C12H15N3O3 - PubChemTRIALLYL ISOCYANURATE. 1025-15-6. 1,3,5-Triallyl-1,3,5-triazinane-2,4,6-trione. Isocyanuric acid triallyl ester. Triallylisocyanurate

US 4,468,482 A - Flame retarded polyisocyanurate foam

A flame retardant polyurethane-modified polyisocyanurate foam composition containing a flame retardant amount of a normally liquid flame retardant polyol ester. The polyol ester is prepared by a process comprising reacting a halogen containing anhydride of a dicarboxylic acid or a mixture of said anhydrides with an aliphatic polyol having at least three hydroxy groups and an aliphatic diol, to US3708440A - Reclaiming scrap polyisocyanurate foam with a process is disclosed for converting scrap polyisocyanurate foam into a polyol which can be used, without the need for any further treatment, as the polyol component in the preparation of polyurethane and related foams. the process comprises heating the scrap at about 175* c. to about 250* c. in the presence of a mixture of (a) an aliphatic diol having from 2 to 6 carbon atoms, inclusive, and

US3708440A - Reclaiming scrap polyisocyanurate foam with

a process is disclosed for converting scrap polyisocyanurate foam into a polyol which can be used, without the need for any further treatment, as the polyol component in the preparation of polyurethane and related foams. the process comprises heating the scrap at about 175* c. to about 250* c. in the presence of a mixture of (a) an aliphatic diol having from 2 to 6 carbon atoms, inclusive, and Universidade do Minho:Aliphatic isocyanurates and The production, processing, and application of aliphatic isocyanate (NCO)-based thermosets such as polyurethane coatings and adhesives are generally limited by the surprisingly high viscosity of tri-functionality and higher-functionality isocyanurates. These compounds are essential crosslinking additives for network formation.

What Are Aliphatic Diisocyanates?

Aliphatic diisocyanates (ADI) are specialty intermediate chemicals used primarily to make durable coatings, adhesives, sealants, elastomers, and textiles, among other products.Generally, they are considered to be specialty materials used in significantly smaller quantities than Zur Synthese aliphatischer Polyisocyanate The Synthesis of Aliphatic Polyisocyanates Containing Biuret, Isocyanurate or Uretdione Backbones for Use in Coatings. Twocomponent polyurethane coatings (2KPUR) are made from polyols and polyisocyanates. Polyisocyanates based on aliphatic diisocyanates with low monomer content are employed for light stable coatings.

Aliphatic isocyanurates and polyisocyanurate networks

Aliphatic isocyanurates and polyisocyanurate networks This results in the formation of highly stable densely crosslinked polyisocyanurate networks, which show interesting material properties. In particular, the good optical properties and high chemical and thermal stability of these materials are attractive qualities. 7-10.

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