Sprayed polyurethane foam

Figure 8.6 Liquid (liquid), froth (center), and spray polyurethane foaming processes...

AY-102 A Guide for Selection of Protective Coatings over Sprayed Polyurethane Foam Roofing-Systems. Reconunended design considerations and guide speciOcations. PFCD-PCI-1/88. 

AY-104 Spray Polyurethane Foam and Protective Coating Systems for New and Remedial Roofing - An illustrated specifier s guide in C.S.I. format. PFCDGSl-1/88. 

AY-105 Spray Polyurethane Foam Roofing Buyer s Check List. What to look for when you have chosen a spray polyurethane foam roofing system. "Prebid and Post-bid."... 

AY-106 Introduction to Spray Polyurethane Foam Roofing Systems. A general overview of a sprayed PUF roofing system. 

AY-107 Spray Polyurethane Foam Blisters. Their causes, types, prevention and repair. 

The Science and Development Network Spray Polyurethane Foam Alliance The Vinyl Institute The Vinyl Coimcil Vinyl in Design... 

Alliance for the Polyurethanes Industry Foamed Polystyrene Alliance Polystyrene Packaging Council Spray Polyurethane Foam ADiance Vinyl Institute... 

Comfort Foam, Residental spray polyurethane foam. Foam Enterprises... 

Spray Polyurethane Foam for Residential Building Envelope Insulation and Air Seal, Spray Polyurethane Foam Alliance, Fairfax, VA, USA, Publication No. AY-112, 2000. 

Knowles M. Learning the difference between 1/2 lb and 2 lb spray polyurethane foam. Mod Mater. 2004 14. 

Applications. The principal use for rigid polyurethane foams is for iasulation ia various forms utilized by a variety of iadustries. Lamiaates for resideatial sheatiag (1.2 to 2.5 cm thick with aluminum skins) and roofing board (2.5 to 10.0 cm thick with roofing paper skins) are the leading products with about 45 metric tons of Hquid spray systems also ia use. Metal doors iasulated by a pour-ia-place process coastitute another substantial use. 

Polyurethane. Polyurethanes (pu) are predominantly thermosets. The preparation processes for polyurethane foams have several steps (see Urethane polymers) and many variations that lead to products of widely differing properties. Polyurethane foams can have quite low thermal conductivity values, among the lowest of all types of thermal insulation, and have replaced polystyrene and glass fiber as insulation in refrigeration. The sprayed-on foam can be appHed to walls, roofs, tanks, and pipes, and between walls or surfacing materials directly. The slabs can be used as insulation in the usual ways. 

Application verification (AV) monitors are devices that are placed within test plots to measure actual spray deposition that occurred during application. The main function of AV monitors is to show whether or not the intended amount of test material was actually deposited on the soil surface. Application monitors consisting of soil-filled containers, paper disks, polyurethane foam plugs, and glass Petri dishes have all been used successfully for this purpose. Prior to using a monitor in the field, it is important to determine that the test substance can indeed be successfully extracted from the monitor and that the compound will be stable on the monitor under field conditions... 

Polyurethane foams are widely used for carpet backing. In the direct coating method, the pre-heated carpet passes direcdy underneath spray heads, which deliver the required amount... 

HDI is a monomer used in the production of polyurethane foams and other related products, and is found in some industrial paints and spray painting operations. It is a compound which reacts readily with water and alcohols (Von Burg 1993). It has a vapor pressure of 0.05 mm Hg at room temperature, but can be present in aerosol form allowing a potentially higher exposure to individuals. The HDI-BT trimer is often present for similar industrial uses. It would be expected to have a lower vapor pressure however, the aerosol form can also be present, allowing potentially higher exposure of HDI-BT to individuals. HDI reacts slowly with water to form carbon dioxide (HSDB 1996). The base-catalyzed reaction of HDI with alcohols should be carried out in inert solvents the reaction may occur with explosive violence in the absence of solvents (NFPA 1994). 

Process and Equipment. Rigid polyurethane foam processes use Ihe same high or low pressure pumping, metering, and mixing equipment for flexible foams. Subsequent handling of the mixture is determined by the end product desired. Processes include lamination, pour-in-place, molding, bun stock, box loams, and spray. 

AIRFORMED CERASHELL is based on the concept of air-supported forming, used successfully for the past 25 years with steel reinforced concrete structures. An airform, or balloon, is designed to inflate to a specific size and shape. Polyurethane foam is sprayed onto the inside surface of the balloon, with concrete as the interior coating. Steel reinforcing bars are pinned to the foam, prior to spraying the con-... 

APB solution can be sprayed on paper or the paper can be dipped into the solution to yield fire-retardant products. In addition to the cellulose, it has also been used as a flame retardant in polyurethane foam and epoxy intumescent coatings. 

---