New polymer materials for contact lens applications
申请人:CIS Pharma AG
公开号:US20200283560A1
公开(公告)日:2020-09-10
The present invention relates to copolymers made from a polymerization mixture comprising (a) one or more polymerizable monomers, which monomers are characterized as having at least one vinylic group and not containing an amino acid residue, (b) one or more not-functionalized side chain-linked amino acids, (c) one or more functionalized side chain-linked amino acids, (d) a free radical initiator and, optionally, (e) a chain-transfer-agent. It also relates to block copolymers comprising the same monomers. The invention also encompasses silicone hydrogel contact lenses coated with or comprising the latter copolymers and block copolymers as well methods for introducing the copolymers and block copolymers into silicone hydrogel contact lenses.
Novel crosslink agents are described that provide for the copolymerization of at least one hydrophilic monomer with at least one lens monomer typically used to prepare materials for ophthalmic lenses. The new crosslink agents have a relatively high selectivity for the hydrophilic monomer and limited reactivity with the crosslink agent used to polymerize the lens monomer.
Rate controlled release of a pharmaceutical agent in a biodegradable device
申请人:Kunzler Jay
公开号:US20070218103A1
公开(公告)日:2007-09-20
Matrix controlled diffusion drug delivery systems comprising a therapeutically effective amount of one or more pharmaceutically active agents entrapped in a copolymer which is a reaction product of a monomeric mixture comprising one or more acrylate ester and/or methacrylate ester-containing monomers and one or more acrylamido-containing monomers are disclosed. Also disclosed are processes for their preparations and methods for their use.
Crosslink agents used to copolymerize at least one hydrophilic monomer with at least one lens monomer typically used to prepare polymeric materials for ophthalmic lenses. The crosslink agents have a relatively high selectivity for the hydrophilic monomer and limited reactivity with the crosslink agent used to polymerize the lens monomer. Accordingly, the invention is also directed to a hydrophilic crosslinked polymer that comprises at least two monomeric units and at least two different crosslink units. The use of the dual crosslink system provides an improved means to control the final chemical, physical and structural characteristics of the resulting polymer.
Biocompatible polymers and co-polymers, and uses thereof
申请人:Hitz Hans
公开号:US20090232871A1
公开(公告)日:2009-09-17
The invention relates to highly biocompatible or biophilic un-cross-linked or cross-linked polymers comprising one or more side-chain active acrylic amino acids of formula I
wherein: X is —NH(CH
2
)
4
—, —O—C
6
H
4
—CH
2
—, —OCH
2
—, —O—CH(CH
3
)—, —S—CH
2
—, —O-proline, and R is H or CH
3
; and wherein the polymer further includes a free radical initiator and, optionally, a cross-linking agent having a plurality of polymerizable ethylenically unsaturated groups. The invention further concerns various highly biocompatible, cross-linked co-polymers comprising one or more monomers of formula I, and one or more other polymerizable monomers. Uses of such polymers and co-polymers for the production of contact lenses, intraocular lenses, implants, wound healing slabs, additives for food and cosmetics, conductive plastics, spinnable fibers, and the like are disclosed.