4538-42-5

Usage

Uses

Used in Plastics and Foams Industry:
Pentane, 1,5-diisocyanatois used as a key ingredient in the production of polyurethane plastics and foams for its ability to form strong, flexible, and durable materials. These materials are valued for their lightweight, insulation properties, and resistance to wear and tear.
Used in Synthetic Fibers:
In the textile industry, Pentane, 1,5-diisocyanatois used as a precursor for the synthesis of high-performance fibers, which are known for their strength, elasticity, and resistance to various environmental factors.
Used in Coatings and Adhesives:
Pentane, 1,5-diisocyanatois utilized as a component in the formulation of coatings and adhesives due to its ability to create strong bonds and provide excellent adhesion to various surfaces. This makes it suitable for use in automotive, construction, and other industries where durable and long-lasting coatings and adhesives are required.
Used in Elastomers:
In the rubber industry, Pentane, 1,5-diisocyanatois used as a raw material for the production of elastomers, which are essential for creating flexible and resilient rubber products with a wide range of applications, including automotive parts, seals, and gaskets.
Safety Considerations:
Given its hazardous nature, Pentane, 1,5-diisocyanatocan cause irritation to the skin, eyes, and respiratory system. Therefore, it is crucial to implement proper safety measures and handling procedures when working with this chemical to prevent exposure and potential health risks.

Upstream product

• 628-77-3 1,5-diiodopentane 
• 3315-16-0 silver cyanate 
• 64624-45-9 heptanedioyl azide 
• 70980-63-1 N,N’-(pentane-1,5-diyl)diformamide 
• 75-44-5 phosgene 
• 462-94-2 1,5-diaminopentane 
• 24424-95-1 di-tert-butyl tricarbonate 
• 111-16-0 heptanedioic acid 
• 657-27-2 L-Lysine hydrochloride 
• 124-38-9 carbon dioxide 
• 32315-10-9 bis(trichloromethyl) carbonate 
• 1138160-85-6 bis(butoxycarbonylamino)pentane 
• 112343-33-6 pentamethylene-1,5-di(methyl carbamate) 
• 78149-92-5 1,5-Bis-carbamoyloxy-pentan 

Downstream Products

• 4685-15-8 N,N'-bis-(aziridine-1-carbonyl)-pentanediyldiamine 
• 117688-67-2 C₄₁H₇₂N₈O₄ 
• 57-13-6 urea 

Relevant academic research and scientific papers

Preparation method of 1, 5-pentamethylene diisocyanate

The invention provides a preparation method of 1, 5-pentamethylene diisocyanate, which comprises the following steps: (1) mixing 1, 5-pentamethylene diamine, a carbonylation agent, a first solvent and a catalyst, carrying out carbonylation reaction, and carrying out solid-liquid separation to obtain a 1, 5-pentamethylene dicarbamate reaction solution; and (2) carrying out purification treatment on the 1, 5-pentamethylene dicarbamate reaction solution obtained in the step (1), mixing the purified 1, 5-pentamethylene dicarbamate with a second solvent, and carrying out pyrolytic reaction to obtain the 1, 5-pentamethylene diisocyanate. The preparation method has the advantages of mild reaction conditions, simple operation, no pollution, small potential safety hazard, and high yield and purity of the intermediate product PDC and the final product PDI.

METHOD FOR PRODUCING CARBAMATE AND METHOD FOR PRODUCING ISOCYANATE

The present invention provides a method for producing a carbamate that includes a step (1) and a step (2) described below: (1) a step of producing a compound (A) having a urea linkage, using an organic primary amine having at least one primary amino group per molecule and at least one compound selected from among carbon dioxide and carbonic acid derivatives, at a temperature lower than the thermal dissociation temperature of the urea linkage; and(2) a step of reacting the compound (A) with a carbonate ester to produce a carbamate.

Method for manufacturing pentamethylene diisocyanate

The present invention provides a method for manufacturing pentamethylene diisocyanate. The method for manufacturing pentamethylene diisocyanate of the present invention manufactures intermediates by using dialkyl carbonate. By thermally decomposing the intermediates under a specific polymerization inhibitor, the method can manufacture the pentamethylene diisocyanate having excellent purity in a high yield.

ISOCYANATE PRODUCTION METHOD

An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.

METHOD FOR PRODUCING PENTAMETHYLENE DIISOCYANATE

PROBLEM TO BE SOLVED: To provide a method for producing pentamethylene diisocyanate which can suppress decrease in flowability of a salt-forming mixture containing pentamethylenediamine hydrochloride in a salt-forming step and suppress adhesion of pentamethylenediamine hydrochloride to a stirring vessel. SOLUTION: There is obtained pentamethylene diisocyanate by preparing an amine raw material containing pentamethylenediamine in which the content ratio of ethanolamine is 0.10 mass% or less, mixing the amine raw material and hydrogen chloride to obtain pentamethylenediamine hydrochloride, followed by reacting the pentamethylenediamine hydrochloride and carbonyl chloride. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPOandINPIT

METHOD FOR PRODUCING PENTAMETHYLENE DIISOCYANATE

PROBLEM TO BE SOLVED: To provide a method for producing a pentamethylene diisocyanate capable of preventing pentamethylenediamine hydrochloride from adhering to a stirring vessel by suppressing deterioration of the fluidity of a salt-forming mixture containing pentamethylenediamine hydrochloride in a salt-forming step. SOLUTION: Pentamethylenediamine and hydrogen chloride are mixed by adjusting so that the existence ratio of particles of pentamethylenediamine hydrochloride having a secondary particle diameter of more than 50 μm and less than 200 μm of all particles of the resulting pentamethylenediamine hydrochloride is 50% or more on the basis of volume. Thereafter, the pentamethylenediamine hydrochloride and carbonyl chloride are reacted to obtain a pentamethylene diisocyanate. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPOandINPIT

METHOD FOR PRODUCING 1,5-PENTANEDIISOCYANATE IN THE GAS PHASE

The invention relates to a method for producing 1,5-pentanediisocyanate (PDI) by reacting 1,5-pentanediamine (PDA) with phosgene in the gas phase.

METHOD FOR PRODUCING ISOCYANATES IN THE GAS PHASE

The invention relates to a method for producing isocyanates by reacting the corresponding primary amines with phosgene in the gas phase, wherein the phosgene is injected into the gaseous amine flow in the interior of the flow tube via an outer ring channel and through several radial channels in an angle of ≦90° relative to the flow direction of the gaseous amine flow, wherein a static mixer of the KENICS type is provided coaxially in the interior of the flow tube.

Method for synthesizing biobased 1,5-pentadiisocyanate

The invention discloses a method for synthesizing biobased 1,5-pentadiisocyanate. The method comprises the following steps: firstly dissolving triphosgene solid in a solvent to obtain a mixed system for later use; dissolving 1,5-pentamethylene diamine and an acid-binding agent in the solvent to obtain a mixed solution for later use; finally pumping the mixed solution into the mixed system under nitrogen condition, stirring, mixing and reacting; filtering after the reaction is ended, extracting liquid part, carrying out reduced-pressure distillation for removing low-boiling-point compounds, then continuing to carry out reduced-pressure distillation to obtain colorless liquid which is biobased 1,5-pentadiisocyanate.

Method for synthesizing pentamethylene diisocyanate

The invention discloses a method for synthesizing pentamethylene diisocyanate. 1,5-pentanediamine or salt produced by 1,5-pentanediamine and dry carbon dioxide or 1,5-pentanediamine and dry hydrogen chloride reacts with solid-state phosgene, a middle product is produced, carbon dioxide or hydrogen chloride is exhausted, and the middle product is pentamethylene dimethylcarbamoyl chloride. The middle product is decomposed at the high temperature to produce pentamethylene diisocyanate and hydrogen chloride. The synthesis method adopts a solid-state phosgene method for synthesis, and solid-state phosgene is in a solid form at the normal temperature, has a higher melting point and a stable property and can be accurately metered during a reaction; high temperature and high pressure are not required in the technological process, the operation is simple and the cost is low.