The results of TGA and DSC analyses of the MEKO-blocked isocyanate
solid are shown in Figs.
METHYLENE DI-P-PHENYLENE ISOCYANATE
LATIN AMERICAN MARKET ANALYSIS
This, combined with isocyanates
having varying functionality, creates coatings with low to high three-dimensional cross-linked structures.
2001) also showed that bond strength of the isocyanate
prepolymer on PB is enhanced with a higher --NCO group content because the unreacted--NCO group reacts with the hydroxyl group from wood or water in PB production.
The materials with low 1,4-butandiol content have long ester chains whereas those with high butandiol contents will contain several isocyanate
groups clustered into a block structure, reflected in the original Mooney plots Fig.
This is due to the slow formation of the polymer film with the isocyanate
groups remaining unreacted for prolonged periods (days and weeks) (9), (10) and from thermal decomposition of the polymer as a result of mechanical abrasion.
WD CARC has much lower levels of organic solvents but may actually contain increased amounts of prepolymers with hexamethylene diisocyanate, which is a type of isocyanate
Environmental Protection Agency, Occupational Safety and Health Administration, National Institute for Occupational Safety and Health, and Google databases using the keywords "isocyanate
," "asthma," "skin," "sensitization," and other synonymous terms, and our own extensive collection of isocyanate
If PUFs are obtained by using water as a blowing agent, the following main chemical reactions occur: urethane formation, reacting hydroxyl groups with the isocyanate
monomer, having an isocyanate
group that easily combines with various substances, is added to and reacted with polymers to provide photo-setting function.
Mondur[R] MA-2300 isocyanate
and Mondur[R] PF-LT isocyanate
are liquid MDI adducts that offer processors significantly improved freeze stability, but with processing and physical properties equal or superior to Bayer's Mondur[R] PF modified monomeric MDI product.
After a long delay, the government of India has released the results of its investigation into the causes of the tragic methyl isocyanate
vapor leak from a Union Carbide plant in Bhopal, India (SN: 12/15/84, p.