Search results
Results from the WOW.Com Content Network
Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...
A polyurethane is typically produced by reacting a polymeric isocyanate with a polyol. [3] Since a polyurethane contains two types of monomers, which polymerize one after the other, they are classed as alternating copolymers. Both the isocyanates and polyols used to make a polyurethane contain two or more functional groups per molecule.
Nitromors (formally "Nitromors Master Craftsman's Paint And Varnish Remover") is a paint-stripping chemical intended for do-it-yourself use. It is manufactured in the U.K. by Henkel Consumer Adhesives of Winsford, Cheshire. The original product, up to circa 2006, came in two versions - "All Purpose" and "Master Craftsman".
Moisture cured polyurethane–urea coatings have been made by reacting 1,2,3-triazole rich polyether polyols with HMDI at NCO/OH eq. ratio of 1.2 to obtain isocyanate-terminated polyurethane prepolymers. The prepolymers were cured under atmospheric moisture to make polyurethane–urea free films. [5]
Tidy Sums. Like so many other things you don't need to buy, many cleaning products simply don't work well, do more harm than good, or can be skipped in favor of a much cheaper do-it-yourself solution.
Varnish on wood stairs Varnished oak floor. Varnish is a clear transparent hard protective coating or film. It is not to be confused with wood stain.It usually has a yellowish shade due to the manufacturing process and materials used, but it may also be pigmented as desired.
In the simplest example oxygen can be used as it exists naturally in its triplet state (i.e. it is a diradical). This is referred to as air inhibition and is a diffusion-controlled reaction with rates typically in the order of 10 7 –10 9 mol −1 s −1 , [ 3 ] the resulting peroxy radicals (ROO•) are less reactive towards polymerisation.
SYSTEM REQUIREMENTS. Mobile and desktop browsers: Works best with the latest version of Chrome, Edge, FireFox and Safari. Windows: Windows 7 and newer Mac: MacOS X and newer Note: Ad-Free AOL Mail ...