Patent ID: 11897982
Assignee: WACKER CHEMIE AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 8:
9. The aqueous polymer dispersion of claim 8, wherein the medium molecular weight polyvinyl alcohol comprises a first medium molecular weight polyvinyl alcohol and a second medium molecular weight polyvinyl alcohol,
wherein the first medium molecular weight polyvinyl alcohol has a Hoppler viscosity, in 4 wt% aqueous solution, of from 20 to 30 mPa·s as measured at 20° C. according to DIN 53015, and
the second medium molecular weight polyvinyl alcohol has a Hoppler viscosity, in 4 wt % aqueous solution, of from 10 to less than 20 mPa·s as measured at 20° C. according to DIN 53015.