发明名称 |
Lightly cross-linked hydrogel formed from N-vinyl lactam and hydrophobic acrylic ester comonomer |
摘要 |
A copolymeric hydrogel for contact lenses with physiological saline uptake 65-85% is formed from an N-vinyl lactam e.g. N-vinyl-2-pyrrolidone and up to 15% of a hydrophobic comonomer of formula <IMAGE> where R1 is H or C1-C4 alkyl (preferably methyl) X is -O- or -NH- and R2 is aryl, C1-C6 alkyl substituted by aryl or aryloxy, or C1-C6 alkoxy substituted by aryl or aryloxy. Preferably the aryl or aryloxy group contain one or two six-membered carbocyclic aromatic rings; they may be C1-C4 alkyl, C1-C4 alkoxy, or halogen, substituted. Crosslinking agents used preferably have their two functional groups differing in reactivity e.g. allyl, or 3-allyloxy-2-hydroxypropyl, methacrylates.
|
申请公布号 |
US4036814(A) |
申请公布日期 |
1977.07.19 |
申请号 |
US19750590037 |
申请日期 |
1975.06.25 |
申请人 |
WARNER-LAMBERT COMPANY |
发明人 |
HOWES, JOHN GORDON BERNARD;DA COSTA, NICHOLAS MARIO;SELWAY, RUPERT ALEC;POTTER, WILLIAM DUNCAN |
分类号 |
G02C7/04;A61L27/16;C08F2/00;C08F2/02;C08F20/52;C08F26/00;C08F220/00;C08F226/06;G02B1/04;(IPC1-7):C08F26/08 |
主分类号 |
G02C7/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|