Carbosiloxane vinylic monomers
View Patent ↗The invention provides a carbosiloxane vinylic monomer which comprises one sole ethylenically unsaturated group, one sole terminal butyl group; and one oligo(carbosiloxane)-containing linkage between the ethylenically unsaturated terminal group and the terminal butyl group. The present invention is also related to a polymer, an actinically-crosslinkable silicone-containing prepolymer, a silicone hydrogel polymeric material, or a silicone hydrogel contact lens, which comprises monomeric units derived from a carbosiloxane vinylic monomer of the invention.
1. A carbosiloxane vinylic monomer of formula (I)
in which: n1 is an integer of 2 to 5; ALK is a C 1 -C 6 alkyl diradical; R 1 and R 2 independent of each another are a C 1 -C 6 alkyl radical; Q is an ethylenically unsaturated group selected from the group consisting of
in which R 3 is hydrogen or a C 1 -C 6 alkyl radical.
2. The carbosiloxane vinylic monomer of claim 1 , wherein Q is an ethylenically unsaturated group of
3. The carbosiloxane vinylic monomer of claim 1 , wherein Q is an ethylenically unsaturated group of
4. The carbosiloxane vinylic monomer of claim 1 , wherein Q is an ethylenically unsaturated group of
in which R 3 is hydrogen or a C 1 -C 6 alkyl radical.
5. The carbosiloxane vinylic monomer of claim 1 , wherein Q is an ethylenically unsaturated group of
in which R 3 is hydrogen or a C 1 -C 6 alkyl radical.
6. A polymer comprising monomeric units derived in a free-radical polymerization from a carbosiloxane vinylic monomer of claim 1 .
7. The polymer of claim 6 , wherein the polymer is an actinically-crosslinkable prepolymer having two or more ethylenically unsaturated groups.
8. The polymer of claim 7 , wherein the actinically-crosslinkable prepolymer further comprises hydrophilic units derived in the free radical polymerization from at least one hydrophilic vinylic monomer.
9. The polymer of claim 6 , wherein the polymer is a silicone hydrogel material which further comprises hydrophilic units derived in the free radical polymerization from at least one hydrophilic vinylic monomer.
10. A silicone hydrogel contact lens which is obtained by polymerizing a polymerizable composition comprising a carbosiloxane vinylic monomer of claim 1 and at least one hydrophilic vinylic monomer.
11. A silicone hydrogel contact lens which is obtained by polymerizing a polymerizable composition comprising an actinically-crosslinkable prepolymer of claim 8 .
12. The silicone hydrogel contact lens of claim 10 , wherein the contact lens has a water content of from about 20% to about 75% by weight when fully hydrated, an oxygen permeability (Dk) of at least about 40 barrers, and an elastic modulus of from about 0.1 MPa to about 2.0 MPa.