BAYER MATERIAL SCIENCE LLC Patent applications |
Patent application number | Title | Published |
20130210951 | POLYOLS SUITABLE FOR HOT MOLDED FOAM PRODUCTION WITH HIGH RENEWABLE RESOURCE CONTENT - Polyols are produced by an alkoxylation process in which a vegetable oil containing hydroxyl functional groups is combined with a DMC catalyst to form a mixture, the DMC catalyst is then activated by adding ethylene oxide and/or propylene oxide to the vegetable oil/catalyst mixture, and ethylene oxide and propylene oxide are added to the mixture containing activated DMC catalyst in amounts such that the total of percentage of ethylene oxide in the polyol plus percentage of primary hydroxyl groups in the polyol produced is from 50 to 77% and the percentage of primary hydroxyl groups is at least 30% but less than 50%. These polyols are useful for the production of molded polyurethane foams, particularly, hot-cure molded polyurethane foams. | 08-15-2013 |
20110281998 | POLYURETHANE-POLYUREA DISPERSIONS BASED ON POLYCARBONATE-POLYOLS - The invention relates to new, hydrolysis-stable, aqueous polyurethane-polyurea dispersions based on polycarbonate-polyols, to a process for preparing them and to their use in coating materials. | 11-17-2011 |
20090306236 | PROCESS FOR PREPARING RIGID POLYISOCYANURATE FOAMS USING NATURAL-OIL POLYOLS - The present invention provides a process for producing a rigid polyisocyanurate foam involving reacting at an isocyanate index of from about 175 to about 400, a polyisocyanate with at least one natural-oil polyol containing at least about 35 wt. %, based on the weight of the polyol, of natural oil, having a hydroxyl number from about 175 to about 375 and a hydroxyl functionality of about 2.0 to about 2.8, in the presence of a blowing agent and optionally, in the presence of one or more of surfactants, flame retardants, pigments, catalysts and fillers, wherein the resulting foam has a renewable biobased content of at least 8% by weight. The foams provided by the inventive process possess properties similar to foams produced from petroleum-derived materials and may find use in wall or roof insulation systems. The high biobased content (>8%) may allow wall or roof insulation systems containing these foams to be considered for the U.S. Government's preferred procurement program. | 12-10-2009 |