28182-81-2

Basic information

• Product Name: POLY(HEXAMETHYLENE DIISOCYANATE)
• Synonyms: POLY(HEXAMETHYLENE DIISOCYANATE);1,6-diisocyanatohexanehomopolymer;1,6-diisocyanato-hexanhomopolymer;coronateeh;hdi-basedisocyanurates;Hexamethylenediisocyanate,homopolymer;hexamethylenediisocyanatebasedisocyanurates;hexamethylenediisocyanatepolymer
• CAS NO: 28182-81-2
• Molecular Formula: (C₈H₁₂N₂O₂)_x
• Molecular Weight: 168.2
• Product Categories: Polymers;Engineering Polymers;Polymer Science;Polyurethanes and Urethane Precursors
• Mol File: 28182-81-2.mol
• Article Data: 80

Chemical Properties

• Flash Point: >230 °F
• Appearance: /
• Density: 1.169 g/mL at 25 °C
• Vapor Pressure: 0.002-0.003Pa at 20-25℃
• Refractive Index: n20/D 1.506
• CAS DataBase Reference: POLY(HEXAMETHYLENE DIISOCYANATE)(CAS DataBase Reference)
• NIST Chemistry Reference: POLY(HEXAMETHYLENE DIISOCYANATE)(28182-81-2)
• EPA Substance Registry System: POLY(HEXAMETHYLENE DIISOCYANATE)(28182-81-2)

Safety Data

• Hazard Codes: Xn,Xi
• Statements: 43-42/43-20-36
• Safety Statements: 36/37-45-23-37-24-26
• RIDADR: UN 2810 6.1 / PGIII
• Hazardous Substances Data: 28182-81-2(Hazardous Substances Data)

Usage

Description

POLY(HEXAMETHYLENE DIISOCYANATE), also known as PolyHDI, is an aliphatic compound belonging to the class of isocyanates. It is generally prepared by reacting hexamethylene diamine with phosgene and is characterized by its colorless liquid form and sharp, irritating odor.

Uses

Used in Polymer Industry:
POLY(HEXAMETHYLENE DIISOCYANATE) is used as a compatibilizer to increase the complex viscosity of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/poly(lactic acid) biopolymer-based blends. This enhancement in viscosity improves the overall properties of the blend, making it suitable for various applications within the polymer industry.
Used in Coatings Industry:
POLY(HEXAMETHYLENE DIISOCYANATE) is used as a hardener that can be mixed with polyol resins to form polyurethane coatings. These coatings have a wide range of applications, including self-cleaning properties, making them valuable in various industries such as automotive, construction, and consumer goods.

Potential Exposure

Used to make other chemicals, coat ings, and polyurethane. It is also used as a hardener in automobile and airplane paints.

Shipping

UN2281 Hexamethylene diisocyanate, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Incompatibilities

May form explosive mixture with air. Isocyanates are highly flammable and reactive with many compounds, even with themselves. Incompatible with oxi dizers (chlorates, nitrates, peroxides, permanganates, per chlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Reaction with moist air, water or alcohols may form amines and insoluble polyureas and react exothermically, releasing toxic, corrosive or flamma ble gases, including carbon dioxide; and, at the same time, may generate a violent release of heat increasing the con centration of fumes in the air. Incompatible with amines, aldehydes, alkali metals, ammonia, carboxylic acids, capro lactum, alkaline materials, glycols, ketones, mercaptans, hydrides, organotin catalysts, phenols, strong acids, strong bases, strong reducing agents such as hydrides, urethanes, ureas. Elevated temperatures or contact with acids, bases, tertiary amines, and acyl-chlorides may cause explosive polymerization. Attacks some plastics, rubber and coatings. Contact with metals may evolve flammable hydrogen gas. May accumulate static electrical charges, and may cause ignition of its vapors. Temperatures above 200℃ can cause polymerization. Attacks copper.

Upstream product

• 60-29-7 diethyl ether 
• 124-09-4 1,6-Hexanediamine 
• 503-38-8 trichloromethyl chloroformate 
• 75-44-5 phosgene 
• 61578-93-6 N,N'-hexanediyl bis-(thiocarbamic acid (S-phenyl) ester) 
• 592-74-5 hexamethylenedicarbamayl fluoride 
• 1266554-70-4 N,N'-hexanediyldicarbamic acid di(4-(1,1,3,3-tetramethylbutyl)phenyl) ester 
• 40777-33-1 hexane-1,6-diyl dicarbamate 
• 6055-52-3 hexane-1,6-diamine dihydrochloride 
• 4223-31-8 N,N′-hexanediyl bis-carbamic acid diphenyl ester 
• 102-09-0 bis(phenyl) carbonate 
• 32315-10-9 bis(trichloromethyl) carbonate 
• 103-71-9 phenyl isocyanate 
• 6030-54-2 1,6-bis(methoxycarbonylamino)hexane 

Downstream Products

• 24536-91-2 N,N'-hexanediyl-di-peroxycarbamic acid bis-(1-methyl-1-phenyl-ethyl ester) 
• 22214-23-9 N',N'''-dioctadecyl-N,N''-hexanediyl-di-urea 
• 5132-94-5 N',N'''-dimethyl-N',N'''-diphenyl-N,N''-hexanediyl-di-urea 
• 98115-68-5 1,1'-Hexamethylen-bis(o-carboxyphenylharnstoff) 
• 16644-54-5 N,N'-bis(tert-butoxycarbonyl)-1,6-hexanediamine 
• 60034-96-0 N,N'-Hexamethylen-bis-mesitylsaeureamid 
• 29284-44-4 1,3-diazonan-2-one 
• 79174-42-8 3,3'-(hexane-1,6-diyl)bis(4-imino-1-phenyl-5-thioxoimidazolidin-2-one) 
• 3779-63-3 (2,4,6-trioxotriazine-1,3,5(2H,4H,6H)-triyl)tris(hexamethylene)isocyanate 
• 35161-65-0 hexanediyldiformamide 
• 13590-65-3 N,N'-bis(pentyloxycarbonyl)hexamethylenediamine 
• 13590-55-1 N-(6-isocyanatohexyl)pentylcarbamate 
• 20941-30-4 N,N'-(hexane-1,6-diyl)bis(3-phenylpropanamide) 
• 16644-45-4 N-<6-Isocyanato-hexyl>-phenyl-urethan 

Relevant articles and documents

Enhanced activity of CuO/ZnO catalyst on the decomposition of dimethylhexane-1,6-dicarbamate into dimethylhexane-1,6-diisocyanate

To decompose dimethylhexane-1,6-dicarbamate (HDC) to hexamethylene diisocyanate (HDI), mixed CuO and ZnO catalysts with Cu/(Cu + Zn) ratio of 4 and 8% were prepared by coprecipitation (CP), sequential precipitation (SP) and incipient wetness impregnation (IW). The SP-derived CuO/ZnO catalysts showed higher HDC yields than those derived by CP and IW. The IW method produced CuO/ZnO catalysts consisting of larger CuO and ZnO particles compared to the two precipitation methods. The CP method led to substitution of Zn2+ by Cu2+ in the hydrozincite precursor phase, resulting in higher BET and Cu surface areas of CuO–ZnO catalysts due to intimate intergrowth of nano-sized particles. However, the inherent character of ZnO in the CP-derived catalysts was modified by interfacial contact between CuO and ZnO identified by UV–visible and Raman spectra. In contrast, the properties of CuO and ZnO, as well as the relatively large surface areas, were kept in the SP-derived catalysts owing to deposition of Cu precipitates to fully aged Zn precipitates. This is believed to be a benefit of the SP method for the reaction. Therefore, our preparation approach has great potential to be extended to various mixed oxide catalysts.

Synthesis of isocyanates from carboxylic acids using diphenylphosphoryl azide and 1,8-bis(dimethylamino)naphthalene

A simple phosgene-free method for the synthesis of high-purity isocyanates from carboxylic acids was developed using diphenylphosphoryl azide and 1,8-bis(dimethylamino)naphthalene. Yields for evaluated monoisocyanates ranged from 60.0% to 81.5%.

METHOD OF PREPARING DIISOCYANATE COMPOSITION

In the embodiments, an aqueous hydrochloric acid solution instead of hydrogen chloride gas and solid triphosgene instead of phosgene gas may be used in the process of preparing a diisocyanate from a diamine through a diamine hydrochloride. In addition, the embodiments provide processes for preparing a diisocyanate composition and an optical lens, which are excellent in yield and quality with mitigated environmental problems by controlling the size of the diamine hydrochloride composition, the b* value according to the CIE color coordinate of the diamine hydrochloride composition, or the content of water in the diamine hydrochloride composition within a specific range.

Method for preparing isocyanate with low hydrolytic chlorine content by gas phase method

The invention relates to a method for preparing isocyanate with low hydrolytic chlorine content by a gas phase method, which comprises the following steps of: carrying out phosgenation reaction on corresponding amine and stoichiometric excess phosgene in a reaction zone in the presence or absence of an inert medium; wherein the reaction conditions are selected such that at least the reaction components amine, isocyanate and phosgene are gaseous under these conditions, and feeding of at least one gas stream comprising amine and at least one gas stream comprising phosgene into the reaction zone, and introducing of a carbon dioxide stream in a quenching zone at the rear end of the reaction zone are carried out, and the molar content of the carbon dioxide stream is less than 60% of the molar weight of the phosgene stream, so that the isocyanate with low hydrolytic chlorine content can be obtained more easily, the product yield is improved, and the investment cost of the device is reduced.