Formation of a biuret (diisocyanate + water). The reaction producing a polyisocyanate may result in the residual presence of small amounts of the initial ingredients (the diisocyanates) which are not converted t
Urethane-filled polyisocyanates are produced by (a) reacting a hexamethylene diisocyanate-containing residue having less than 10% by weight monomeric hexamethylene diisocyanate and a total NCO content of at least 25% with an alcohol containing at least one ether linkage in an equivalent ratio of ...
The reaction was carried out in the same device as in Example 1 between 2010 g of the same desiccated poly(hexamethylene carbonate) polyol as used in Example 1 and 776 g of tolidine-diisocyanate to prepare a pseudoprepolymer having an NCO content of 5.7%. The pseudoprepolymer (2900 g) was...
Urethane-filled polyisocyanates are produced by (a) reacting a hexamethylene diisocyanate-containing residue having less than 10% by weight monomeric hexamethylene diisocyanate and a total NCO content of at least 25% with an alcohol containing at least one ether linkage in an equivalent ratio of ...
Urethane-filled polyisocyanates are produced by (a) reacting a\nhexamethylene diisocyanate-containing residue having less than 10% by\nweight monomeric hexamethylene diisocyanate and a total NCO content\nof at least 25% with an alcohol containing at least one ether linkage in an\nequivalent ratio ...
The FTIR result shows the NCO of HDI can react with the OH of MVER. The microstructure of material prepared by MVER and HDI was characterized by NMR, and it was revealed that the unique microstructure leads to the good performances. The different content of HDI has an influence on the ...
NCO of HDI can react with the-OH of MVER.The microstructure of material prepared by MVER and HDI was characterized by NMR,and it was revealed that the unique microstructure leads to the good performances.The different content of HDI has an influence on the microstructure,and the microstructure...
Reaction monitoring by NCO content titration and UV–visible spectroscopy reveals a dependency between the onset of phase separation and conversion. It is found that an increase of the initial content of hexamethylene diisocyanate delays the onset of phase separation. Differential scanning calorimetry ...
Reaction monitoring by NCO content titration and UV-visible spectroscopy reveals a dependency between the onset of phase separation and conversion. It is found that an increase of the initial content of hexamethylene diisocyanate delays the onset of phase separation. Differential scanning calorimetry ...
NCO of HDI can react with the-OH of MVER.The microstructure of material prepared by MVER and HDI was characterized by NMR,and it was revealed that the unique microstructure leads to the good performances.The different content of HDI has an influence on the microstructu...