Abstract Partial (10% to 30%) substitution of soy flour in polymeric diphenylmethane diisocyanate (pMDI) resin substantially reduces platen sticking during hot-pressing particle mats. Adding the a fixed dose pMDI (instead substituting it) an even greater extent. The decreases tack cured pMDI, thereby reducing propensity resinated particles transfer platen. reduction effect on contrasts with its...

OBJECTIVES 1,5-Naphthalene diisocyanate (NDI) is used in the plastic industry as a curing agent. 1,5-Naphthalene diisocyanate is classified as a sensitizing agent. The objective of this study has been to develop biomonitoring methods for the evaluation of exposure to NDI. MATERIAL AND METHODS We obtained blood and urine samples from a group of 20 male workers exposed to NDI. The workers answe...

The determination of isocyanates concentrations in air is complicated by thepresence of these substances as monomers and oligomers as well as in thevapor and aerosol phases. Direct-reading instruments (DRIs) are available fordetermining the diisocyanate concentrations in workplace air, but they arecalibrated for the monomers only. Industry uses polymeric diisocyanateswhich c...

BACKGROUND Two outbreaks of allergic contact dermatitis caused by isocyanates at two companies in southern Sweden initiated a research project focusing on contact allergy to isocyanates. Within the project, there was an interest in determining how often contact allergy to the most common isocyanate, diphenylmethane-4,4'-diisocyanate (4,4'-MDI), occurred. OBJECTIVES To determine and compare th...

Hydrogels based on gelatin have evolved as promising multifunctional biomaterials. Gelatin is crosslinked with lysine diisocyanate ethyl ester (LDI) and the molar ratio of gelatin and LDI in the starting material mixture determines elastic properties of the resulting hydrogel. In order to investigate the clinical potential of these biopolymers, hydrogels with different ratios of gelatin and dii...

A new series of exTTF hosts has been synthesized for supramolecular binding study of fullerenes C60 and C70. Binding constants for C60 in chlorobenzene, toluene, toluene-CH2Cl2 and CS2 have been calculated for different hosts and a direct structure-affinity relationship has been established. As predicted, receptors with two exTTF moieties (1, 3 and 4) have demonstrated higher binding abilities ...

An aryl diisocyanate has been used to attach an appropriately protected 2'-deoxyribonucleoside bearing a free 3'-hydroxyl group, to a long chain alkylamine controlled pore glass support via a urethane moiety, in a simple two step procedure. This obviates the need for the preparation and short column chromatographic purification of the 2'-deoxyribonucleoside-3'-O-succinates required for preparat...