The grafted MWNTs were obtained through the acid-amine reaction between the hexamethylene diamine
and opened MWNTs by utilizing a modified method based on the studies of Chen et al.
The relatively small-sized cells obtained with diamine
(TDA and EDA) implies that gelling reactions are catalyzed by the initiator amine during the foaming process as urethane forming reactions are catalyzed by amine.
Isophorone and isophorone diamine
are important components in the production of industrial flooring as well as paints and coatings, for example.
(PPD) exists in the form of white colored crystals when pure, and rapidly turns brown when exposed to air.
In this work, we synthesized polyimides by incorporating an aromatic diamine
monomer with a methylene linker, 4,4'-methylenebis(2,6-dimethylaniline) (MBDMA), along with aliphatic polyetherdiamine backbone linkers and pyromellitic dianhydride (PMDA) as seen in Fig.
hardeners are used extensively in flooring applications (3) because they offer a balance between ease of handling and final properties such as fast cure, low viscosity, low toxicity, good adhesion, and excellent color stability.
Major toxic substance in hair dye is Paraphenylene Diamine
(PPD) which after its consumption causes life threatening cervico-facial edema needing emergent endotracheal intubation or tracheostomy and severe rhabdomyolysis leading to renal failure.
These free-flowing particles include: (a) a rubber particle, and (b) a coating deposited over at least a portion of the rubber particle, wherein the coating includes: (1) a polyurethane-urea resin that is a reaction product of a reaction mixture comprising: (i) a polyol having a number average molecular weight of 1,800 to 12,000; (ii) an aromatic diamine
; (iii) a polyisocyanate; and (iv) a catalyst for the reaction between hydroxyl groups and isocyanate groups; and (2) a solid particle anti-clumping agent.
The study measured levels of diamine
oxidase--the enzyme responsible for disintegrating histamine --both before and after, and saw no significant change across the patient group.