EP0293560A1
Expired / Lapsed
EP
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Intraocular lens
Assignee: Canon Inc
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Filing: 1988-03-07
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Granted: —
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Expires: 2008-03-07
Abstract
Abstract A composition for an intraocular lens comprising, an organopolysiloxane (A) having a viscosity of 10,000 cp or below and comprising at least one unsaturated aliphatic group, an organopolysiloxane (B) comprising at least three hydrogenated silyl units and a platinum compound; wherein the platinum compound based on its platinum content constitutes 10 - 200 ppm by weight of the composition. The composition provides a homogeneous intraocular lens even when it is injected into a crystalline capsule through a slender tube such as an injection needle.
Inventors
- 👤 Nobuo Kushibiki
- 👤 Noriyuki Nose
- 👤 Yukichi Niwa
- 👤 Norio Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:36
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/26; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; C; C08; C08L; C08L83/00; C08L83/04; A61L2430/00; A61L2430/16; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A composition for an intraocular lens comprising, an organopolysiloxane (A) having a viscosity of 10,000 cp or below at normal temperature and comprising at least one unsaturated aliphatic group in an average polymer molecule, an organopolysiloxane (B) comprising at least three hydrogenated silyl units in an average polymer molecule, and a platinum compound; wherein said platinum compound based on its platinum content constitutes 10 - 200 ppm by weight of said composition.
Claim 2
Dependent Claim
72 words
A composition for an intraocular lens comprising, an organopolysiloxane (A) having a viscosity of 10,000 cp or below at normal temperature and comprising at least one unsaturated aliphatic group in an average polymer molecule, an organopolysiloxane (B) comprising at least three hydrogenated silyl units in an average polymer molecule, and a platinum compound; wherein said platinum compound based on its platinum content constitutes 10 - 200 ppm by weight of said composition.
Claim 3
Dependent Claim
22 words
A composition according to Claim 1, wherein said organopolysiloxane (A) comprises 1 - 5 unsaturated aliphatic groups in an average polymer molecule.
Claim 4
Dependent Claim
21 words
A composition according to Claim 1, wherein said organopolysiloxane (A) has a viscosity of 20 - 5,000 cp at normal temperature.
Claim 5
Dependent Claim
22 words
A composition according to Claim 1, wherein said organopolysiloxane (B) comprises 3 - 5 hydrogenated silyl units in an average polymer molecule.
Claim 6
Dependent Claim
22 words
A composition according to Claim 1, wherein said organopolysiloxane (B) has a viscosity of 10,000 i cp or below at normal temperature.
Claim 7
Dependent Claim
21 words
A composition according to Claim 5, wherein said organopolysiloxane (B) has a viscosity of 20 - 5,000 cp at normal temperature.
Claim 8
Dependent Claim
20 words
A composition according to Claim 1, which has a viscosity of 20 - 10,000 cp at normal temperature before curing.
Claim 9
Dependent Claim
20 words
A composition according to Claim 7, which has a viscosity of 20 - 5,000 cp at normal temperature before curing.
Claim 10
Dependent Claim
25 words
A composition according to Claim 1, wherein said platinum compound based on its platinum content constitutes 20 - 150 ppm by weight of said composition.
Claim 11
Dependent Claim
95 words
An intraocular lens having a shear modulus of 1 x 10 3 - 5 x 10 6 dyne/cm 2 ; said lens comprising a cured product of a composition comprising: an organopolysiloxane (A) having a viscosity of 10,000 cp or below at normal temperature and comprising at least one unsaturated aliphatic group in an average polymer molecule, an organopolysiloxane (B) comprising at least three hydrogenated silyl units in an average polymer molecule, and a platinum compound; wherein said platinum compound based on its platinum content constitutes 10 - 200 ppm by weight of said composition.
Claim 12
Dependent Claim
95 words
An intraocular lens having a shear modulus of 1 x 10 3 - 5 x 10 6 dyne/cm 2 ; said lens comprising a cured product of a composition comprising: an organopolysiloxane (A) having a viscosity of 10,000 cp or below at normal temperature and comprising at least one unsaturated aliphatic group in an average polymer molecule, an organopolysiloxane (B) comprising at least three hydrogenated silyl units in an average polymer molecule, and a platinum compound; wherein said platinum compound based on its platinum content constitutes 10 - 200 ppm by weight of said composition.
References Cited (Backward Citations)
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