Patent ID: 7875150
Filing Date: 2011-01-25
Classification: C08B,D21H,Y10S

Abstract:
1. A retention and strengthening papermaking additive comprising a partially deacylated microbial biomass of a polymer or oligomer having carbohydrate units chemically bound to glucosamide units, and the dissolved mycelium of the microbial biomass in an aqueous vehicle, said partially deacylated biomass containing 6 to 25%, by weight, of the biomass, of non-deacylated glucosamide units and glucosamine units derived from deacylation of glucosamide units of said polymer or oligomer, and 94 to 75% by weight of the biomass, of said carbohydrate units and said carbohydrate units being chemically bound to said glucosamine units and any non-deacylated glucosamide units, the partial deacylation of the biomass being from 35 to 80% deacylation.