Contact lens having improved dimensional stability
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G02C-007/04
출원번호
US-0875046
(2001-06-07)
발명자
/ 주소
Benz, Patrick H.
Ors, Jose A.
출원인 / 주소
Benz Research and Development Corp.
대리인 / 주소
Foley & Lardner
인용정보
피인용 횟수 :
3인용 특허 :
27
초록▼
A contact lens and a contact lens blank having increased dimensional stability are constructed from a copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate, wherein the copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate has either an absolute water
A contact lens and a contact lens blank having increased dimensional stability are constructed from a copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate, wherein the copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate has either an absolute water balance ratio greater than 8 or a relative water balance ratio greater than 2 relative to a polymer of 2-hydroxyethyl methacrylate.
대표청구항▼
1. A contact lens having increased dimensional stability, formed from 2,3-dihydroxypropyl methacrylate, 2-hydroxyethyl methacrylate, and a crosslinker and having a relative water balance ratio greater than two relative to a polymer of 2-hydroxyethyl methacrylate. 2. The contact lens according to cla
1. A contact lens having increased dimensional stability, formed from 2,3-dihydroxypropyl methacrylate, 2-hydroxyethyl methacrylate, and a crosslinker and having a relative water balance ratio greater than two relative to a polymer of 2-hydroxyethyl methacrylate. 2. The contact lens according to claim 1, which is formed from monomers that consist essentially of 2,3-dihydroxypropyl methacrylate, 2-hydroxethyl methacrylate, and ethylene glycol dimethacrylate. 3. The contact lens according to claim 1, wherein the 2,3-dihydroxypropyl methacrylate is purified by distillation prior to being polymerized. 4. The contact lens according to claim 1, wherein the 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate are present in a molar ratio of from 10:90 to 99:1. 5. The contact lens according to claim 1, wherein the contact lens is a spheric lens. 6. The contact lens according to claim 1, wherein the contact lens is a toric lens. 7. The contact lens according to claims 1, wherein the contact lens is a multifocal lens. 8. The contact lens according to claim 1, wherein the contact lens is a hydrated contact lens and has a water content of 40 to 70 percent by weight. 9. The contact lens according to claim 1, wherein the 2,3-dihydroxypropyl methacrylate, the 2-hydroxyethyl methacrylate, and the crosslinker form a copolymer that comprises from 20 to 90 mole percent of 2,3dihydroxypropyl methacrylate. 10. The contact lens according to claim 1, wherein the crosslinker comprises ethylene glycol dimethacrylate. 11. The contact lens according to claim 1, which is formed from monomers consisting of 2,3-dihydroxypropyl methacrylate, 2-hydroxyethyl methacrylate, and the crosslinker. 12. The contact lens according to claim 11, wherein the crosslinker consists of ethylene glycol dimethacrylate.
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이 특허에 인용된 특허 (27)
Claussen Eric R. (Denver CO) Hoffman William C. (Denver CO) Smith Lawrence A. (Denver CO), Apparatus and method for tinting hydrophilic contact lenses.
Seiderman Maurice (3306 Deronda Drive Hollywood CA 90028), Contact lens from hydrophilic gel polymers of polyvinylpyrrolidone and hydroxyalkyl methacrylate.
Vinzia Francis D. (23 ; Avenue Gnral Leclerc 92350 Le Plessis Robinson FRX) Bonnet Roger J. A. (122 ; Avenue du Commandant Roland ; Bat ; K3 ; La Cadenelle 13008 Marseille FRX), Contact lens having at least one aspherical, progressive multifocal face, process for the preparation thereof and use of.
Blum Ronald D. (Roanoke VA) Gupta Amitava (San Marino CA), Toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses and method of manufacturing.
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