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US 12,740,939 B2Granted
Elastomeric matrices based on plasticized PVOH compositions and uses thereof
AssigneeaVISI Ltd.
InventorsNir Betser, Itai Adin, Keren Hadar
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Abstract
Provided herein is an elastomeric matrix which includes poly(vinyl alcohol) (PVOH), at least two plasticizers none of which is water, and water. The combined mass ratio of plasticizers to PVOH is at least 2:1; and the combined mass content of PVOH and plasticizers is at least 70% by weight of the total weight of the matrix excluding water.
Claims20
An ophthalmic device comprising an elastomeric matrix that comprises:
- poly(vinyl alcohol) (PVOH),
- at least one plasticizer which is not water, and
- water,
- wherein:
- a mass ratio of said plasticizer to said PVOH is at least 2:1;
- and
- a combined mass content of said PVOH and said plasticizer is at least 70-50% wt of the total weight of the matrix excluding said water.
4 more elements
Dependencies are inferred from the claim text.