Patent ID: 7439311
Filing Date: 2008-10-21
Classification: C08F

Abstract:
1. A method for producing a polymer comprising polymerization in a polymerization reactor having an inner wall covered with an anti-fouling agent comprising an aqueous solution having a pH of 9 or greater and containing a polyvinyl alcohol obtained through saponification of a polyvinyl ester that contains monomer units having a silyl group of formula (1): wherein R wherein the polyvinyl alcohol satisfies the following formulae (I) and (II): wherein P indicates the viscosity-average degree of polymerization of the polyvinyl alcohol, and S indicates the content (mole %) of the monomer units having a silyl group of formula (1) in the polyvinyl alcohol; wherein A indicates the content (ppm) of silicon atoms in the polyvinyl alcohol, and B indicates the content (ppm) of silicon atoms in the polyvinyl alcohol that was washed with sodium hydroxide-containing methanol and then washed with methanol by Soxhlet extraction, wherein A and B are measured by ICP emission spectrometry after ashing of a sample.