公开(公告)号：US20190256436A1

公开(公告)日：2019-08-22

申请号：US16371449

申请日：2019-04-01

申请人： Nutrient Encapsulation Technologies

发明人： Eric Rosenthal ,  Brian Patterson

IPC分类号： C05G3/00

摘要： A controlled release fertilizer has been prepared comprising a nutrient core coated with one or more moisture barrier coatings, at least one of said moisture barrier coatings comprising: at least one polyethylene wax; and a thermoset polyurethane from the reaction of a polyol and a polyisocyanate. The weight ratio of thermoset polyurethane to polyethylene wax is from about 50:50 to about 98:2. The polyethylene wax is heated above the melt point of the polyethylene wax and mixed and dispersed into the polyol component of the thermoset polyurethane in a ratio of 90-70% polyol to 10-30% polyethylene wax before the thermoset polyurethane-forming mixture is applied to the surface of the nutrient core and cured. A coating of a high temperature microcrystalline wax can be applied prior to final curing of the thermoset polyurethane to the coated nutrient core particles.

公开(公告)号：US10961165B2

公开(公告)日：2021-03-30

申请号：US16371449

申请日：2019-04-01

申请人： Nutrient Encapsulation Technologies

发明人： Eric Rosenthal ,  Brian Patterson

IPC分类号： C05G3/00 ,  C05G5/30 ,  C05C3/00 ,  C05C9/00 ,  C05C1/02 ,  C05B7/00 ,  C05C5/00 ,  C05C5/02 ,  C05B3/00 ,  C05C1/00 ,  C05D1/00 ,  C05D9/00

摘要： A controlled release fertilizer has been prepared comprising a nutrient core coated with one or more moisture barrier coatings, at least one of said moisture barrier coatings comprising: at least one polyethylene wax; and a thermoset polyurethane from the reaction of a polyol and a polyisocyanate. The weight ratio of thermoset polyurethane to polyethylene wax is from about 50:50 to about 98:2. The polyethylene wax is heated above the melt point of the polyethylene wax and mixed and dispersed into the polyol component of the thermoset polyurethane in a ratio of 90-70% polyol to 10-30% polyethylene wax before the thermoset polyurethane-forming mixture is applied to the surface of the nutrient core and cured. A coating of a high temperature microcrystalline wax can be applied prior to final curing of the thermoset polyurethane to the coated nutrient core particles.

公开(公告)号：US10562827B1

公开(公告)日：2020-02-18

申请号：US16566148

申请日：2019-09-10

申请人： Nutrient Encapsulation Technologies

发明人： Eric Rosenthal ,  Brian Patterson

IPC分类号： C05G3/00 ,  C05C3/00 ,  C05C5/02 ,  C05C9/00 ,  C05D1/00 ,  C05C1/00 ,  C05B7/00 ,  C05B3/00 ,  C05D9/00

摘要： A controlled release fertilizer has been prepared comprising a nutrient core coated with one or more moisture barrier coatings, at least one of said moisture barrier coatings comprising: at least one polyethylene wax; and a thermoset polyurethane from the reaction of a polyol and a polyisocyanate. The weight ratio of thermoset polyurethane to polyethylene wax is from about 50:50 to about 98:2. The polyethylene wax is heated above the melt point of the polyethylene wax and mixed and dispersed into the polyol component of the thermoset polyurethane in a ratio of 90-70% polyol to 10-30% polyethylene wax before the thermoset polyurethane-forming mixture is applied to the surface of the nutrient core and cured. A coating of a high temperature microcrystalline wax can be applied prior to final curing of the thermoset polyurethane to the coated nutrient core particles.