专利名称：DISPERSION STABILIZER FOR SUSPENSION
POLYMERIZATION AND METHOD FORPRODUCING VINYL RESIN
发明人：FUKUHARA, Tadahito申请号：EP15859532申请日：20151111公开号：EP3219735A4公开日：20180822
摘要：A dispersion stabilizer for suspension polymerization is provided that includes avinyl alcohol-based polymer (A), wherein a 0.1 mass% concentration aqueous solution ofthe polymer (A) has an absorbance (a1) of less than 0.25 at a wavelength of 280 nm, theaqueous solution has an absorbance (a2) of less than 0.030 at a wavelength of 320 nm, thepolymer (A) has a degree of saponification of not less than 68 mol% and not more than98 mol%, the polymer (A) has a viscosity-average degree of polymerization of more than1500 and less than 4500, and the polymer (A) in powder form has a YI value of not lessthan 5. The dispersion stabilizer is capable of producing a vinyl-based resin that isexcellent in polymerization stability, has a small particle size, and has an improved bulkdensity.
申请人：KURARAY CO., LTD.
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