Toluene diisocyanate number

Formation of diamines from dinitro compounds, which are unable to interact intramolecularly, presents no problem. Very large volumes of diaminotoluene, a precursor to toluene diisocyanate, are produced by hydrogenation of dinitrotoluene over either nickel or palladium-on-carbon. Selective hydrogenation of one or the other of two nitro groups is much more of a challenge, but a number of outstanding successes have been recorded. A case in point is the hydrogenation of 2,4-dinitroaniline (11) to 4-nitro-l,2-benzenediamine (12) (2) or to 2-nitro-l,4-benzenediamine (10). 

A number of studies have dealt with the photo-induced discoloration and degradation of polyurethanes based on aromatic diisocyanates such as toluene diisocyanate (TDI - represents a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate isomers) and methylene 4,4-diphenyl diisocyanate (MDI) Cl, 2, 3,... 

RCRA waste number U223, see 2,4-Toluene diisocyanate... 

Kelly, T. J., Determination of Formaldehyde and Toluene Diisocyanate Emissions from Indoor Residential Sources, California Air Resources Board, Research Division, 2020 L Street, Sacramento, CA 95814, Final Report, Contract Number 93-315, November, 1996. 

In the Montreal case-control study carried out by Siemiatycki (1991) (see monograph on dichloromethane in this volume), the investigators estimated the associations between 293 workplace substances and several types of cancer. Isocyanates were one of the substances, and it was stated that the most common form in this study was toluene diisocyanates. The main occupations to which isocyanate exposure was attributed in this study were motor vehicle refinishers, motor vehicle mechanics and foundry workers. Only 0.8% of the study subjects had ever been exposed to isocyanates. For most types of cancer examined (oesophagus, stomach, colon, rectum, pancreas, prostate, bladder, kidney, skin melanoma, lymphoma), there was no indication of an excess risk due to isocyanates. For lung cancer, in the population subgroup of French Canadians (the majority ethnic group in this region), based on 10 cases exposed at any level, the odds ratio was 2.2 (90% CI, 0.9-5.3). [The interpretation of the null results has to take into account the small numbers and presumably low exposure levels. Workers had multiple exposures.]... 

Figure 4, Extractable organic profile (ethyl ether/hexane, 5/95) of a random lot of flexible PUF reconstructed ion chromatograms (GC-MS). A, solvent extract B, Soxhlet blank. Component identification (scan number, component) 232, phenol 391, hexanoic acid, 2-ethyl 490, 2,4- or 2,6-toluene diisocyanate (TDI) 507,2-propanamine, 2-methyl 592, phenol, 2,6-bis-(l,l-dimethylethyl)-4-methyl 696, chloroctane (isomer) 737, anthracene-dw (internal standard) 1047, isooctane, ethenyloxy. Continued on next page.

Tan delta(S) TDI Tear strength material from its surface. Usually expressed in milligrams loss per number of cycles per a given load. The viscous modulus/elastic modulus. An abbreviation for toluene diisocyanate. The maximum force required to tear a specified specimen, the force acting mainly parallel to the major axis of the test specimen. 

Curing of the acetylenic polyacetals to rubbery polyurethanes could be achieved with any of a number of commercially available diisocyanates, including 2,4-toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), dianisidine diisocyanate (DADI), and 4,4 -diisocyanatodiphenyl-methane (MDI). The first two diisocyanates were studied most extensively. The reactions were carried out in solution in benzene, toluene, and ethylene bromide, and in bulk. The bulk reaction, which is the only... 

FINOTTO, S FABBRI, L.M., RADO, V., MAPP, C.E. MAESTRELLI, P. (1991) Increase in numbers of CD8 positive lymphocytes and eosinophils in peripheral blood of subjects with late asthmatic reactions induced by toluene diisocyanate. British Journal of Industrial Medicine, 48, 116-121. 

A number of different hindered diamines have been investigated as a substitute for MOCA (1). In addition to diamine curing agents, which are used most frequently with elastomers based on polyether polyols and toluene diisocyanate (TDI), prepolymers based on polyether or polyester polyols and 4,4 -diphenylmethane diisocyanate (MDI), can be cured with diols to yield elastomers with similar properties to those of diamine-cured polyester-TDI elastomers. The most common chain extender is butanediol. However, to achieve improved mechanical properties, especially at elevated temperatures, aromatic diols are often used. The most common one is hydroquinone di-(beta-hydroxy-ethyl) ether (HEQ). 

Benzene, 1,3 Jiisocyanatomethyl- CCRIS 596 Desmodur T 80 Desmodur T100 Diisocyanatotoluene 1,3-Diisocyanatomethylbenzene EINECS 247-722-4 HSDB 6003 Isocyanic acid, methyl-m-phenylene ester Methyl-m-phenylene isocyanate Methylphenylene isocyanate Mondur TD-80 Nacconate-lOO Niax iso-cyanate TDI RCRA waste number U223 Rubinale TDI Rubinate TDI 80/20 TDI TDI 80-20 Toluene-2,4-diisocyanate (mixt. with Toluene-2,6-diisocyanate) Toluene diisocyanate 2,4/2,6-Toluene diisocyanate iso-meric mixture 2,4-Toluene diisooyanate 2,4- and 2,6-Toluene diisocyanate Toluenediisocyanate (mixed isomers) Tolylene diisocyanate Tolylene isocyanate m-Tolylidene diisocyanate UN 2078. Mixture of... 

Toluene diisocyanate used in flexible polyurethane foam is formed as a number of isomers. The most common TDI mixture is supplied as an 80 20 mix of the 2,4 isomer and the 2,6 isomer. Other ratios are commer-... 

The polyurethane was prepared from ARCO s hydroxy-terminated polybutadiene (R-45HT), toluene diisocyanate (TDI), trimethylolpropane and N,N-bis(2-hydroxypropyl)-aniline using a slightly modified two-stage procedure from that described by ARCO (12,13). The ratio ([-NCO]/ total Onj) was kept constant and equal to 1.0 but the ratio [-NCO] to hydroxyl number of R-45HTwas varied in some experiments. For adhesion studies, a 6% excess [-NCO] to hydroxyl number of R-45HT was used. The ratio of the substituted aniline to the triol was about 10 to 1 in most experiments. In one series, the latter ratio was varied. 

Synonyms AI3-015101 BRN 0744602 CCRIS 3742 Desmodur T80 2,4-Diisocyanato-l-methylbenzene Diisocyanatoluene 2,4-Diisocyanotoluene Hylene T Hylene TCPA Hylene TLC Hylene TM Hylene TM-65 Hylene TRF Isocyanic acid, methylphenylene ester Isocyanic acid, 4-methyl-/ 3-phenylene ester 4-Methylphenylene diisocyanate 4-Methylphenylene isocyanate Mondur TD Mondur TD-80 Mondur TDS Nacconate 100 NCI-C50533 Niax TDI Niax TDI-P NSC 4791 NSC 56759 RCRA waste number U223 Rubinate TDI 80/20 TDI 2,4-TDI TDI-80 Toluene 2,4-diisocyanate Tolyene-2,4-diisocyanate Tolylene-2,4-diisocyanate 2,4-Tolylene diiso-cyanate /n-Tolylene diisocyanate UN 2078. 

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