نتایج جستجو برای: isocyanate

تعداد نتایج: 1172  

Journal: :Polymer Degradation and Stability 2022

Polyurethane (PU) foams are widely used for many applications, however the use of toxic isocyanate monomers their synthesis has recently led researchers to non-isocyanate PU foams. The most promising alternative is aminolysis cyclic carbonate which yields polyhydroxyurethanes (PHU). Nevertheless, obtained suffer from significant flammability and require introduction flame retardants improve ret...

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Journal: :Green Chemistry 2023

The synthesis of aromatic diisocyanate derived from lignocellulosic raw materials, namely guaiacol and vanillyl alcohol, through phosgene-free route offers the prospect greener approaches for isocyanate production polyurethane industry.

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Journal: :Occupational and environmental medicine 1997
K Jakobsson K Kronholm-Diab L Rylander L Hagmar

OBJECTIVES To study the prevalence of symptoms from the eyes and the upper and lower respiratory tract, lung function, and immunological sensitisation towards isocyanates in pipelayers exposed to thermal degradation products from methylene diphenyl diisocyanate (MDI)-based polyurethane (PUR). MATERIAL AND METHODS 50 presently active and 113 formerly active pipelayers were examined. Also, 65 u...

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Journal: :The Annals of occupational hygiene 2004
S R Woskie J Sparer R J Gore M Stowe D Bello Y Liu F Youngs C Redlich E Eisen M Cullen

As part of the Survey of Painters and Repairers of Auto bodies by Yale (SPRAY), the determinants of isocyanate exposure in auto body repair shops were evaluated. Measurements (n = 380) of hexamethylene diisocyanate-based monomer and polyisocyanate and isophorone diisocyanate-based polyisocyanate were collected from 33 auto body shops. The median total reactive isocyanate concentrations expresse...

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2002
M Wirts T Salthammer

The time course of isocyanate emission from curing PUR-adhesives was studied in an emission test chamber. The adhesives under investigation were commercial products for fixing of textile floor coverings and based on methylene bisphenyl diisocyanate (MDI). Influence of the curing mechanism was studied by comparing the emission curves of one-component adhesive (OCA) and two-component adhesive (TC...

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Journal: :Journal of the Society of Materials Science, Japan 1988

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Journal: :Journal of Renewable Materials 2019

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Journal: :Polymers 2020

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Journal: :Canadian Journal of Chemistry 1962

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Journal: :Polymer Chemistry 2021

Correction for ‘Synthesis and structural characterization of bio-based bis(cyclic carbonate)s the preparation non-isocyanate polyurethanes’ by Kamila B?a?ek et al., Polym. Chem., 2021, DOI: 10.1039/d0py01576h.

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