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The rate of reaction of polyaspartic esters can be manipulated, thus extending the pot life and controlling the cure rate of aliphatic coatings. This allows formulators to create high solids coatings systems which are user-friendly with longer working times and still maintain a fast-cure. [ 10 ]
On July 6, 2011, Sherwin-Williams acquired Leighs Paints, based in Bolton UK, manufacturers of intumescent and high performance industrial coatings. [21] On June 4, 2012, Sherwin-Williams acquired Geocel Holdings Corp for an undisclosed amount. [22] Sherwin-Williams acquired the Valspar Corporation on March 20, 2016, for $11.3 billion. [23]
Polyurethane dispersion, or PUD, is understood to be a polyurethane polymer resin dispersed in water, rather than a solvent, although some cosolvent may be used.Its manufacture involves the synthesis of polyurethanes having carboxylic acid functionality or nonionic hydrophiles like PEG (polyethylene glycol) incorporated into, or pendant from, the polymer backbone. [1]
Globally, the most widely accepted standard for acceptable levels of VOC in paint is Green Seal's GS-11 Standards from the US which defines different VOC levels acceptable for different types of paint based on use case and performance requirements. [14] [15]
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 ...
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.
It is thought that polyurea coatings last 25–30 years. [9] Commercial trademarks for Polyurea include Line-X, GLS 100R, and Pentens SPU-1000, to name a few. [10] [11] [12] There are multiple possible polyurea formulations. The Polyurea Development Association is a trade association that represents the interests of polyurea coating ...
Water-based coatings began development in the late 1980s. In the early 1990s they began to be widely used, specifically marketed towards drinking water supply lines. Previously, water supply lines were coated using a harmful solvent-based coating, using such solvents as benzene, toluene, hexane and other volatile organic compounds (VOC).