Patent ID: 8801852
Filing Date: 2014-08-12
Classification: C04B,C08J

Abstract:
1. A gypsum slurry comprising: calcium sulfate hemihydrate; water; a dispersant component selected from the group consisting of a comb-branched polymer having polyether side chains, naphthalene sulfonate-formaldehyde condensate, melamine sulfonate-formaldehyde condensate and mixtures of two or more thereof; a foaming agent; and a polycondensation component comprising: a first polycondensation repeating unit having a polyether side chain and one of the group consisting of an aromatic sub-unit and a heteroaromatic sub-unit; a second polycondensation repeating unit having a OP (OH) a third polycondensation repeating unit having one of the group consisting of an aromatic sub-unit and a heteroaromatic sub-unit; wherein said second polycondensation repeating unit and said third polycondensation repeating unit differ exclusively in that the OP(OH) wherein the weight ratio of the dispersant component to the polycondensation component ranges from 1:99 to 75:25.