| abstract |
PURPOSE: A dispersion stabilizer which can give an emulsion having a small temperature dependency of viscosity and excellent freezing stability and low- temperature shelf stability, comprising a PVA having a specified distribution of a degree of polymerization. n CONSTITUTION: Polyvinyl acetate obtained by polymerizing vinyl acetate and, optionally, a copolymerizable monomer (e.g., ethylene) is saponified to obtain a dispersion stabilizer comprising a PVA having a degree of saponification ≥60mol%, an average-degree of polymerization ≥3,000 and a ratio of a weight- average degree of polymerization (Pw) to a number-average degree of polymerization (Pn), Pw/Pn, ≤2.4. n COPYRIGHT: (C)1986,JPO&Japio |