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

Claim 7:
8. The aqueous polymer dispersion of claim 1, wherein the polyvinyl alcohol comprises at least one medium molecular weight polyvinyl alcohol and at least one low molecular weight polyvinyl alcohol, wherein the medium molecular weight polyvinyl alcohol is a polyvinyl alcohol having a Hoppler viscosity, in 4 wt % aqueous solution, of from 10 to 35 mPa·s as measured at 20° C. according to DIN 53015, and
the low molecular weight polyvinyl alcohol is a polyvinyl alcohol having a Hoppler viscosity, in 4 wt % aqueous solution, of from 3 to less than 10 mPa·s as measured at 20° C. according to DIN 53015.