Patent ID: 11932992
Assignee: UPM-KYMMENE CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC C  D  Y | IPC C  D

Claim 0:
1. A paper substrate which is suitable for binding silicone in a catalytic hydrosilation reaction, the paper substrate comprising
a cellulose fiber-based support layer and
a hydrophobic primer layer that contains acetalized polyvinyl alcohol, wherein the acetalized polyvinyl alcohol
has a weight average molecular weight of less than 50000 g/mol, and
contains a vinyl group molality which is equal to or higher than 0.2 millimoles per gram of the acetalized polyvinyl alcohol, and wherein
the functional vinyl groups are part of catenated carbon structures which contain at least 4 carbon atoms, and which have an acetal connectivity with the backbone chain of the acetalized polyvinyl alcohol.