| 摘要 |
<p>A method for producing polymers of vinyl-chloride by suspension polymerization, the suspension stabilizer used being either A. a methylhydroxypropyl-cellulose with 20 to 32% methoxyl substitution, 2 to 10% hydroxy-propoxyl substitution, and a viscosity of 30 to 70 mPa.s, and/or B. a combination of suspension agents consisting of a) methyl-cellulose with 22 to 34% methoxyl substitution and a viscosity of 7 to 20 mPa.s, and b) methylcellulose with 22 to 34% methoxyl substitution and a viscosity of 50 to 4000 mPa.s and/or methylhydroxypropyl-cellulose with 20 to 32% methoxyl substitution, 2 to 10% hydroxy-propoxyl substitution, and a viscosity of 100 to 3000 mPa.s, polymerization being carried out in the presence of 0.4 to 8% by weight of an ethylene vinylacetate copolymer. The polymers obtained are suitable for lowering the viscosity of polyvinyl-chloride plastisols.</p> |
