摘要:
A process for cost-effectively and rapidly insulating a desired surface with spray foam insulation is described which includes the application of a polyurethane foam dispensed through heated conduits into a dispensing gun having a nozzle with essentially planar divergent lips having a triangular prism opening, the lips of the nozzle diverging at an angle of between about 5 and 35° inclusive, more preferably between 8 to 15° inclusive, most preferably 10 to 12° inclusive, thereby achieving application rates which are in excess of 70 Ft2/min, and optimally in excess of 100 Ft2/min.
摘要:
A disposable nozzle for an airless, polyurethane spray gun has an inlet chamber section sealingly latched to the gun nose for receiving polyurethane foam components, a mixing chamber section adjacent the inlet chamber containing a static mixer for mixing the polyurethane components and a dispensing tip section adjacent the mixing chamber for discharging the polyurethane as a spray. The dispensing tip has a longitudinally extending passage terminating at a rectangular opening in the tip defined by long side edges and short side edges. The length of the long side edges are generally maintained throughout the tip passage and approximate the diameter of the mixing chamber exit to produce a consistent rectangular fan spray pattern from the nozzle. Spray guide tabs extend from the long side edges of the rectangular tip opening to alleviate nozzle drip during dispensing.
摘要:
Stable foam caulk, sealant and insulation compositions are disclosed. The compositions comprise a waxy, solid foam stabilizer and a liquid lithophilic surfactant having low HLB value of about 3-14. The foam stabilizer provides stable support for bubbles formed from the drying of the latex emulsion of film forming polymer, and the volatile liquid hydrocarbon propellant. In addition to the use in caulking sealant or insulation methods, the compositions can be used to form artificial terrains or other hardenable structural surfaces as backgrounds or support means for hobbies, crafts and the like.
摘要:
Foamable, silicone oil compositions and methods of lubricating surfaces with such compositions. Compositions in accordance with the invention may be sprayed onto surfaces from aerosol canisters or other spray containers to form stable foams which do not run or drip, preferably for periods in excess of sixteen hours. A composition in accordance with the invention comprises an aqueous emulsion of a silicone oil. Oil-in-water emulsions of polysiloxanes, such as polydimethylsiloxane, having melting points no greater than about 32.degree. F. (0.degree. C.) are preferred. The composition further comprises a liquefiable gaseous propellant, preferably including a volatile liquid hydrocarbon or a mixture of volatile liquid hydrocarbons. The composition further comprises a solid, non-ionic lipophilic surfactant, preferably having an HLB value of about 3 to about 8, more preferably about 3.5 to about 6. Useful surfactants include fatty acid esters, fatty alcohol ethers and fatty acid amides. The high temperature stability of the composition may be improved by adding a high temperature foam stabilizer having a melting point greater than about 110.degree. F. (43.degree. C.). Preferred foam stabilizers include polar, linear saturated long chain fatty alcohols having twenty or more carbon atoms in the molecule.
摘要:
The invention described herein relates to an essentially closed-cell two-component polyurethane foam containing an pesticide, which upon curing provides a barrier to insect infestation.
摘要:
The invention described herein relates to an essentially closed-cell two-component polyurethane foam containing an pesticide, which upon curing provides a barrier to insect infestation.
摘要:
Stable foam caulk, sealant and insulation compositions are disclosed. These compositions comprise aqueous emulsions of film forming polymers in combination with microfibers. The preferred film forming polymers and the microfibers include functional groups capable of forming bonds, particularly hydrogen bonds, between these components. In another aspect of the invention, the compositions include a high temperature foam stabilizer, such as a high molecular weight fatty alcohols, having melting points greater than about 110° F.
摘要:
Stable foam caulk, sealant and insulation compositions are disclosed. The compositions comprise solid, waxy non-ionic lipophilic surfactants having low HLB values. These surfactants, upon foamed dispensing of the composition, provide stable support for bubbles formed from drying of a latex emulsion of a film forming polymer and a volatile liquid hydrocarbon propellant. In addition to use in caulking, sealant or insulation methods, the composition can be used to form artificial terrains and other hardenable structural surfaces as backgrounds or support means for hobbies, crafts, and the like.
摘要:
Stable foam caulk, sealant and insulation compositions are disclosed. These compositions comprise aqueous emulsions of film forming polymers in combination with microfibers. The preferred film forming polymers and the microfibers include functional groups capable of forming bonds, particularly hydrogen bonds, between these components. In another aspect of the invention, the compositions include a high temperature foam stabilizer, such as a high molecular weight fatty alcohols, having melting points greater than about 110° F.
摘要:
Stable foam caulk, sealant and insulation compositions are disclosed. The compositions comprise solid, waxy non-ionic lipophilic surfactants having low HLB values. These surfactants, upon foamed dispensing of the composition, provide stable support for bubbles formed from drying of a latex emulsion of a film forming polymer and a volatile liquid hydrocarbon propellant. In addition to use in caulking, sealant or insulation methods, the composition can be used to form artificial terrains and other hardenable structural surfaces as backgrounds or support means for hobbies, crafts, and the like.