EP0328340A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hydrophilic oxygen permeable polymers
Assignee: Bausch and Lomb Inc
•
Filing: 1989-02-07
•
Granted: —
•
Expires: 2009-02-07
Abstract
Abstract A polymeric composition useful for forming biomedical devices, especially contact lenses, is formed by polymerizing a mixture comprising: (a) a compound represented by the general formula: where R¹ and R² independently denote a hydrogen atom or an alkyl radical with one to six carbon atoms, and R³ and R⁴ independently denote alkyl radicals with one to six carbon atoms or a cycloalkyl radical with 5 or 6 carbon atoms; and (b) an acrylate or methacrylate-functional polysiloxane monomer.
Inventors
- 👤 Ronald E. Bambury
- 👤 Joon Choo Dong
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 14:05
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/02; C07D263/30; C07D263/34; C07D263/36; C07D263/42; C08; C08F; C08F226/00; C08F226/06; C08F230/00; C08F230/04; C08F230/08; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A contact lens composition formed by polymerizing a mixture comprising: (a) a compound represented by the general formula: where R¹ and R² independently denote a hydrogen atom or an alkyl radical with one to six carbon atoms, and R³ and R⁴ independently denote alkyl radicals with one to six carbon atoms or a cycloalkyl radical with 5 or 6 carbon atoms; and (b) an acrylate or methacrylate-functional polysiloxane monomer.
Claim 2
Dependent Claim
69 words
A contact lens composition formed by polymerizing a mixture comprising: (a) a compound represented by the general formula: where R¹ and R² independently denote a hydrogen atom or an alkyl radical with one to six carbon atoms, and R³ and R⁴ independently denote alkyl radicals with one to six carbon atoms or a cycloalkyl radical with 5 or 6 carbon atoms; and (b) an acrylate or methacrylate-functional polysiloxane monomer.
Claim 3
Dependent Claim
113 words
A composition formed by polymerizing the mixture: (a) 1 to 98 weight percent siloxane monomer represented by the formula: where A denotes an acrylate or methacrylate radical, R⁵ and R⁶ independently denote alkyl radicals with one to six carbon atoms or phenyl radicals, x and y are on the average one to six, and m is at least one; b) 1 to 50 weight percent of an internal wetting agent represented by the general formula where R¹ and R² independently denote a hydrogen atom or a lower alkyl radical with one to six carbon atoms, and R³ and R⁴ independently denote alkyl radicals with one to six carbon atoms or a cyclohexyl radical.
Claim 4
Dependent Claim
113 words
A composition formed by polymerizing the mixture: (a) 1 to 98 weight percent siloxane monomer represented by the formula: where A denotes an acrylate or methacrylate radical, R⁵ and R⁶ independently denote alkyl radicals with one to six carbon atoms or phenyl radicals, x and y are on the average one to six, and m is at least one; b) 1 to 50 weight percent of an internal wetting agent represented by the general formula where R¹ and R² independently denote a hydrogen atom or a lower alkyl radical with one to six carbon atoms, and R³ and R⁴ independently denote alkyl radicals with one to six carbon atoms or a cyclohexyl radical.
Claim 5
Dependent Claim
20 words
The composition of claim 2 where said mixture further comprised from 1 to 80 weight percent of a toughening agent.
Claim 6
Dependent Claim
29 words
The composition of claim 3 which comprises: 60-95 weight percent of the siloxane monomer (a); 1-20 weight percent of said internal wetting agent; and 4-20 weight percent toughening agent.
Claim 7
Dependent Claim
10 words
The composition of claim 1 where the compound is 2-vinyl-4,4-dimethyl-2-oxazolin-5-one.
Claim 8
Dependent Claim
10 words
The composition of claim 1 where the compound is 2-isopropenyl-4,4-dimethyl-2-oxazolin-5-one.
Claim 9
Dependent Claim
11 words
The composition of claim 2 where the wetting agent is 2-isopropenyl-4,4-dimethyl-2-oxazolin-5-one.
Claim 10
Dependent Claim
11 words
The composition of claim 2 where the wetting agent is 2-vinyl-4,4-dimethyl-2-oxazolin-5-one.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.