Macromers comprising pendant polyoxazoline groups and end groups
AssigneeDsm IP Assets B.V.
InventorsAylvin Jorge Angelo Athanasius DIAS, Scott CURTIN, MengMeng ZONG, Meng OUYANG
Life of this patent
Estimating the term…
Abstract
The invention is directed to a macromer comprising unit derived from a siloxane diol, di-isocyanates and a diol comprising a pendant group comprising an oligomer or polymer derived from methyl oxazoline or ethyl oxazoline. The invention also relates to a process for the preparation of said macromers, and to that the use of said macromers. The macromers according to the invention may be used in lenses, such as ophthalmic lenses. Films comprising the macromers according to the invention provide a surprisingly low modulus in combination with a high water content and oxidative stability.
Claims15
A macromer having the structure of formula (I) or (II) or (III) or (IV):
- E1-[X-Sil]z-X—[[Y—[X-Sil]n]m-X-E2 (I)
- E1-[[Y—[X-Sil]n]m-X—Y-E2 (II)
- E1-[X—Y]z—X-[Sil-[X—Y]n]m—X-E2 (III)
- E1-Sil-[X—Y]z—X-[Sil-[X—Y]n]m—X-Sil-E2 (IV)
- wherein
- E1 and E2 are end groups containing at least one reactive double bond,
- Y is a diol derived unit comprising at least one pendant group comprising an oligomer or polymer derived from methyl oxazoline or ethyl oxazoline,
- X is a unit derived from a diisocyanate,
- Sil is a unit derived from siloxane diol oligomer or siloxane diol polymer,
- and wherein
- m is an integer ranging from 1 to 50,
- n is an integer ranging from 1 to 50, and
- z is an integer ranging from 1 to 50.
Dependencies are inferred from the claim text.