Patent ID: 9592516
Date: 2017-03-14
CPC Classifications: B05B,B05D,B29B,C08G

Claim:
1. A polyurethane spraying system used to minimize emissions of a polyisocyanate while spraying a mixture of a polyisocyanate and a resin composition onto a surface at a rate of 5 to 30 lbs/min, said system comprising: A. a first reactant supply tank comprising the resin composition having a hydroxyl content of at least 400 mg KOH/g and comprising; B. a second reactant supply tank comprising the polyisocyanate; C. a non-gaseous pump that is coupled with said first and second reactant supply tanks; D. a mixing apparatus that is coupled with said first and second reactant supply tanks for mixing the resin composition and the polyisocyanate prior to spraying; E. a spray nozzle that is coupled with said mixing apparatus and that produces less than 50 parts of the polyisocyanate per one billion parts of air according to the National Institute for Occupational Safety and Health 5521 Impingement Method while spraying the mixture onto the surface to form a polyurethane foam, said spray nozzle comprising; wherein said spray nozzle produces a flat spray pattern.