Barrier membrane
AssigneeStraumann Holding AG
InventorAaldert Rens Molenberg
Life of this patent
Estimating the term…
Abstract
Cell-occlusive membrane, obtainable by reaction of at least two precursors in the presence of water. The first precursor A comprises a core and n chains each having a conjugated unsaturated group or a conjugated unsaturated bond, and the second precursor B comprises a core and m chains each having a thiol group, wherein m is greater than or equal to 2, n is greater than or equal to 2, and m+n is greater than or equal to 5. The reaction forms a three dimensional network with crosslinking-points. The adjacent crosslinking-points are connected by a chain having less than 600 atoms.
Claims16
Cell-occlusive membrane formed by reaction of at least two precursors in the presence of water, wherein
- a first precursor A comprising a core carrying n chains each having a conjugated unsaturated group or a conjugated unsaturated bond attached to any of the last 20 atoms of the chain and
- a second precursor B comprising a core carrying m chains each having a thiol group attached to any of the last 20 atoms of the chain, wherein
- m is 2 to 8,
- n is 4 to 8,
- the first precursor A and the second precursor B forming a three dimensional network with crosslinking-points, wherein
- each core of the precursors forms a crosslinking-point if m and n are greater than 2, and
- if m is equal to 2 the corresponding crosslinking-point is the core of the adjacent first precursor A, and
- the adjacent crosslinking-points are connected by a chain having less than 330 atoms.
Dependencies are inferred from the claim text.