Collection and Analysis of Airborne Hexamethylene Diisocyanate by a Modified OSHA Method

2008 ◽  
pp. 203-203-10 ◽  
Author(s):  
GE Podolak ◽  
RA Cassidy ◽  
GG Esposito ◽  
DJ Kippenberger
Keyword(s):  
Hexamethylene Diisocyanate

A greener and sustainable approach for converting polyurethane foam rejects into superior polyurethane coatings

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foam ◽  
Sebacic Acid ◽  
Polyurethane Foams ◽  
Hexamethylene Diisocyanate ◽  
Alkali Resistance ◽  
Microwave Reaction ◽  
P Recycling ◽  
Amine Groups ◽  
Green Polymer

Recycling is a crucial area of research in green polymer chemistry. Various developments in recycling are driven by Environmental concerns, interest in sustainability and desire to decrease the dependence on non-renewable petroleum based materials. Polyurethane foams [PUF] are widely used due to their light weight and superior heat insulation as well as good mechanical properties. As per survey carried Polyurethane Foam Association, 12 metric tonnes of polyurethane foam are discharged during manufacturing and/or processing and hence recycling of PUF is necessary for better economics and ecological reasons. In present study, rejects of PUF is subjected to reaction with a diethylene amine in presence of sodium hydroxide [NaOH] as catalyst, as a result depolymerised product containing hydroxyl and amine groups is obtained. Conventional and Microwave reaction for depolymerizing polyurethane foam have been carried, and best results are obtained by Microwave reaction. Further depolymerised product with hydroxyl and amine functionalities are reacted with bis (2-hydroxyethyl terephthalate) [BHET] obtained by recycling polyethylene terephthalate [PET] and sebacic acid, with stannous oxalate [FASCAT 2100 series] as catalyst to obtain Polyester amides. These Polyester amides having hydroxyl and amino groups in excess are cured with isocyanates-hexamethylene diisocyanate biuret [HDI biuret] and isophorone diisocyanate [IPDI] for coating applications. The coated films are characterized using physical, mechanical and chemical tests, which shows comparable physical, mechanical properties but alkali resistance is poor.

Synthesis and Properties of Biodegradable Liquid Crystalline Poly(ester-Urethane)s Based on Poly(L-Lactic Acid)

2013 ◽  
Vol 652-654 ◽  
pp. 459-462
Author(s):  
Ya Tong Guo ◽  
Zhu Zheng ◽  
Zhen Qi Hou ◽  
Jie Du
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Lactic Acid ◽  
Physical Properties ◽  
Liquid Crystalline ◽  
Degradation Rate ◽  
Hydrolytic Degradation ◽  
Hexamethylene Diisocyanate ◽  
Solution Polymerization ◽  
Phase Transition Temperatures

A series of biodegradable segmented liquid crystalline poly(ester-urethane)s were prepared by solution polymerization of poly(L-lactic acid) (PLLA), mesogenic diol prepolymer poly(butylene terephthaloyldioxy dibenzoates) (MD), and hexamethylene diisocyanate (HDI). The MD content was varied from 0 to 40 mol% so that the effects of the mesogen content on the thermal and physical properties, and hydrolytic degradation were examined respectively. It was found that introducing mesogens units could increase the thermal stability and the elastic properties, while reduced the phase transition temperatures and the hydrolytic degradation rate.

scholarly journals Characteristics of Isocyanurate Polyisocyanate Derived from Hexamethylene Diisocyanate and Their Use

1996 ◽  
Vol 69 (6) ◽  
pp. 378-388
Author(s):  
Mitsuo KASE ◽  
Mitsuru OOTSUBO ◽  
Yoichi TANIMOTO ◽  
Noboru OKOSHI
Keyword(s):  
Hexamethylene Diisocyanate

Synthesis of novel polyurethanes from sugars and 1,6-hexamethylene diisocyanate

2001 ◽  
Vol 45 (2) ◽  
pp. 123-127 ◽  
Author(s):  
R. Garçon ◽  
C. Clerk ◽  
J.-P. Gesson ◽  
J. Bordado ◽  
T. Nunes ◽  
...  
Keyword(s):  
Hexamethylene Diisocyanate

Prospective immunologic and clinical study of a population exposed to hexamethylene diisocyanate

1988 ◽  
Vol 82 (4) ◽  
pp. 627-633 ◽  
Author(s):  
Leslie C. Grammer ◽  
Paul Eggum ◽  
Michael Silverstein ◽  
Martha A. Shaughnessy ◽  
Janice L. Liotta ◽  
...  
Keyword(s):  
Clinical Study ◽  
Hexamethylene Diisocyanate

scholarly journals Synthesis of hexamethylene diisocyanate-functionalized graphene oxide for solar cell applications

2018 ◽  
Vol 57 ◽  
pp. 02005
Author(s):  
J A Luceño ◽  
A M Díez-Pascual ◽  
R Peña ◽  
P García-Díaz
Keyword(s):  
Graphene Oxide ◽  
Solar Cell ◽  
Conjugated Polymers ◽  
Polymer Solar Cells ◽  
Hexamethylene Diisocyanate ◽  
Functionalized Graphene ◽  
Polar Solvents ◽  
Functionalized Graphene Oxide ◽  
Hydrophobic Nature ◽  
Highly Hydrophobic

Graphene (G), an allotrope of carbon with exceptional optical, electronic, thermal and mechanical properties, and its oxidized form graphene oxide (GO), show huge potential for a broad range of applications. In particular, their high conductivity, transparency, flexibility, and abundance make them suitable for polymer solar cells (PSCs). However, their insolubility in common organic solvents hinders their applications. Consequently, novel functionalization approaches are pursued. The present work is devoted to the preparation of hexamethylene diisocyante-functionalized graphene oxide (HDI-GO). The synthesized nanomaterial shows a highly hydrophobic nature and can be dispersed in organic non-polar solvents, hence is a prospective candidate to be combined with conjugated polymers for solar cell applications.

Field Comparison of Air Sampling Methods for Monomeric and Polymeric 1,6-Hexamethylene Diisocyanate

2011 ◽  
Vol 8 (3) ◽  
pp. 161-178 ◽  
Author(s):  
Jennifer M. Thomasen ◽  
Kenneth W. Fent ◽  
Carolyn Reeb-Whitaker ◽  
Stephen G. Whittaker ◽  
Leena A. Nylander-French
Keyword(s):  
Sampling Methods ◽  
Air Sampling ◽  
Hexamethylene Diisocyanate
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