SILOXANE COMPOUND AND A METHOD FOR PREPARING THE SAME
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US20210122769A1
公开(公告)日:2021-04-29
An object of the present invention is to provide a monomer having a polysiloxane structure and capable of providing a polymer having sufficient compatibility and hydrolysis resistance while having high oxygen permeability useful for an ophthalmic device, and a method for producing the monomer. The present invention provides a compound represented by the formula (1) which has a radical-polymerizable group at one terminal, one to three alkylsiloxy groups having a hydrophilic and bulky group represented by formula (3-A) or formula (3-B), and has a divalent hydrocarbon group L which has 2 to 20 carbon atoms and may contain one or more selected from an ether bond and a urethane bond, a part of hydrogen atoms bonded to the carbon atoms may be substituted with a hydroxyl group.
In one aspect, the invention relates to methods of synthesizing acryloyl compounds, comprising the step of hydrosilylating a compound having the structure:
with a compound having the structure A-H, wherein A comprises a siloxanyl group, to yield a compound having the structure:
Compounds and compositions produced thereby can effectively attain a satisfactory balance between high oxygen permeability and hydrophilicity while achieving an acceptably low concentration of undesirable impurities. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Disclosed are reduced pressure distillation methods for purifying siloxanyl monomers in the presence of at least one polymerization inhibitor. In further aspects, the polymerization inhibitor can be an alkylhydroquinone or a hydroxynaphthalene. Also disclosed are compounds purified by the disclosed methods and polymers produced therefrom. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Low n-vinyl lactam content-based biomedical devices and process for preparation thereof
申请人:BAUSCH & LOMB INCORPORATED
公开号:EP0079720A2
公开(公告)日:1983-05-25
Low N-vinyl lactam content copolymers are crosslinked with resonance free di(alkene tertiary amine) cyclic compounds to obtain biomedical devices, particularly soft contact lenses, which have good oxygen permeability and mechanical properties.
N-vinyl lactam-based biomedical devices and process for preparation thereof
申请人:BAUSCH & LOMB INCORPORATED
公开号:EP0079721A2
公开(公告)日:1983-05-25
N-vinyl lactam monomers and comonomers are crosslinked with resonance free di(alkene tertiary amine) cyclic compounds to obtain biomedical devices, particularly contact lenses, which have high oxygen permeability and good mechanical properties.