| Patent application number | Description | Published |
|---|
| 20080207784 | Polyvinylchloride/polyurethane hybrid foams with improved burn properties and reduced after-glow - The present invention provides a rigid polyurethane foam comprising the reaction product, at an isocyanate index of from about 90 to about 400, of a polyisocyanate and a polyol component comprising, about 20 wt. % to about 80 wt. %, based on the weight of the polyol component, of a double metal cyamide (DMC)-catalyzed polyether polyol having a number average molecular weight of greater than about 1,000 Daltons (Da), about 80 wt. % to about 20 wt. %, based on the weight of the polyol component, of a sucrose-based polyol having a functionality of from about 2.5 to about 6 and a number average molecular weight of from about 350 Da to less than about 1,000 Da, and about 0 wt. % to about 40 wt. %, based on the weight of the polyol component, of a low molecular weight organic compound having a number average molecular weight of less than about 600 Da in the presence of water, polyvinylchloride (PVC) particles having a diameter of from about 0.1 microns to about 200 microns, glass beads having a diameter of from about 40 microns to about 400 microns, and about 1 wt. % to about 30 wt. %, based on the weight of the polyol component, of expanded graphite, optionally, in the presence of at least one of carbon dioxide, surfactants, flame retardants other than expanded graphite, crosslinking agents, pigments and catalysts, wherein the rigid polyurethane foam with a density of about 10 pcf to about 25 pcf has a heat sag measured at 102 mm overhang at 121° C. and one hour of less than about 5 mm and an average after-glow time of less than about 35 seconds. The inventive rigid polyurethane foams exhibit improved burn properties and reduced after-glow while maintaining improved heat sag performance over commercial materials. | 08-28-2008 |
| 20080207787 | Rigid polyurethane foams with increased heat performance - The present invention provides a rigid polyurethane foam made from the reaction product, at an isocyanate index of from about 90 to about 400, of a polyisocyanate, and a polyol component containing about 20 to about 80 wt. %, based on the weight of the polyol component, of a double metal cyanide (DMC)-catalyzed polyether polyol having a number average molecular weight of greater than about 1000 Daltons (Da), about 80 to about 20 wt. %, based on the weight of the polyol component, of a sucrose-based polyol having a functionality of from about 2.5 to about 6 and a molecular weight of from about 350 to less than about 1,000, and about 0 to about 40 wt. %, based on the weight of the polyol component, of a low molecular weight organic compound having a number average molecular weight of less than about 600 Da, in the presence of water, polyvinylchloride (PVC) particles having a diameter of from about 0.1 to about 200 microns, and glass beads having a diameter of from about 40 to about 400 microns (about 270 to about 45 mesh), and optionally, in the presence of at least one of carbon dioxide, surfactants, flame retardants, pigments and catalysts, wherein the rigid polyurethane foam with a density of about 10 to about 25 pcf has a heat sag measured at 102 mm overhang at 121° C. and one hour of less than about 8 mm. The inventive rigid polyurethane foams exhibit increased heat performance (decreased heat sag) while also maintaining impact and rebound strengths. | 08-28-2008 |
| 20080227878 | Trimer and allophanate modified isocyanates, a process for their production, foams comprising these modified isocyanates, and a process for the production of these foams - This invention relates to stable liquid, trimer and allophanate-modified isocyanates, a process for the production of these isocyanates, foams prepared from these isocyanates and a process for the production of these foams. | 09-18-2008 |
| 20090292036 | TRIMER AND ALLOPHANATE MODIFIED ISOCYANATES, A PROCESS FOR THEIR PRODUCTION, FOAMS COMPRISING THESE MODIFIED ISOCYANATES, AND A PROCESS FOR THE PRODUCTION OF THESE FOAMS - This invention relates to stable liquid, trimer and allophanate-modified isocyanates, a process for the production of these isocyanates, foams prepared from these isocyanates and a process for the production of these foams. | 11-26-2009 |
| 20090313909 | Low density semi-rigid flame resistant foams - The present invention provides a low density, semi-rigid polyurethane foam made from the reaction product, at an isocyanate index of from about 100 to about 150, of at least one polyisocyanate and an isocyanate-reactive blend containing from about 15 wt. % to about 55 wt. %, based on the weight of the resin, of a difunctional or greater functionality polyether polyol, from about 3 wt. % to about 19 wt. %, based on the weight of the resin, of at least one polyether tetrol, and from about 7 wt. % to about 39 wt. %, based on the weight of the resin, of at least one non-halogenated polyester polyol in the presence of from about 5 wt. % to about 30 wt. %, based on the weight of the resin, of at least one non-hydroxy functional flame retardant and from about 1 wt. % to about 20 wt. %, based on the weight of the resin, of at least one cross linking agent, and optionally in the presence of one or more of catalysts, surfactants, chain extenders and blowing agents, wherein the semi-rigid polyurethane foam having a density of from about 2 to about 25 pcf meets at least a V-1 class rating in accordance with UL 94 V flammability testing. The low density, semi-rigid polyurethane foams of the present invention may find use in producing lightweight, rapidly erected barriers for protection of people such as soldiers, police officers and fire fighters from pursuit by adversaries. Barriers made with the inventive foam may also be used to limit access to already secured areas. | 12-24-2009 |
| 20100260941 | REINFORCED UV-A CURABLE COMPOSITE COMPOSITIONS AND METHODS - The present disclosure is directed to a process for forming a reinforced ultraviolet (UV) radiation-curable composite. The composite may be formed by applying reinforcing layers and resin layers to a substrate. The resin composition may include an aliphatic urethane acrylate oligomer, a polyfunctional acrylate monomer, and a photoinitiator. The composite formed on the substrate may be exposed to UV radiation to cure the composite on the substrate. The composite may be characterized in that it is cured within 10 minutes of exposure to UV radiation and does not exhibit oxygen inhibition effects, such as, for example, surface tack. The reinforced UV-curable composite may find utility, for example, as a rapid field repair patch in aerospace applications, among others. | 10-14-2010 |
