Patent ID: 11884756
Assignee: KURARAY CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 7:
8. Modified vinyl alcohol-based polymer particles, comprising:
a vinyl ester unit, wherein a ratio of three or more consecutive vinyl ester units to a total vinyl ester units is 30% or less, a vinyl alcohol unit content based on a total constitutional units is 60 mol % or more and less than 95 mol %, and an average particle diameter is from 50 to 2000 μm, and
the vinyl ester unit is a unit of formula (2):, wherein X denotes a carbon-carbon bond or a divalent saturated hydrocarbon group having a carbon number from 1 to 10 optionally having a branched structure, Y denotes a hydrogen atom or a saturated hydrocarbon group having a carbon number from 1 to 6 optionally having a branched structure, and Z denotes a hydrogen atom or a methyl group, and
wherein a sulfur content is in a range of from 0.01 to 20000 ppm.