摘要:
A process for removing extractables from biomedical devices, particularly ophthalmic biomedical devices, involves contacting the device with a mixture of first and second extractants. The first extractant is an organic compound having a flash point above 38° C., and the second extractant is an organic compound having a flash point below 38° C.
摘要:
A polysiloxane comprises diaryl, dialkyl, and arylalkyl siloxane units, and further has at least a functional group. Such polysiloxane can be further copolymerized with an additional monomer to produce polymeric compositions suitable for making ophthalmic devices. The additional monomer can be selected to produce desirable properties for ophthalmic applications, such as high refractive index and/or high elongation.
摘要:
Provided are surface modified contact lenses formed from one or more fumaric- or itaconic-containing prepolymers having reactive functionality that is complimentary to reactive hydrophilic polymers.
摘要:
Hydrogel copolymers are useful for forming biomedical devices, particularly ophthalmic devices including contact lenses, intraocular lenses and ophthalmic implants. The copolymers have a desirable combination of oxygen permeability, tensile modulus, and water content, especially for soft contact lenses.
摘要:
A process for producing polysiloxane prepolymers of improved homogeneity for use in the production of relatively high refractive index polymeric compositions is described herein. Polymeric compositions so produced are useful in the production of ophthalmic devices such as for example intraocular lenses and corneal inlays. The preferred polymeric compositions are produced through the copolymerization of one or more polysiloxane prepolymers with hydrosilane-containing polysiloxanes.
摘要:
A polymeric radiation-absorbing material comprises units of a polymerizable benzotriazole-based radiation-absorbing compound and a monomer, and is capable of absorbing UV radiation, at least about 90 percent of light having wavelength of 425 nm, less than about 50 percent of light having wavelength of 450 nm, and less than about 30 percent of light having wavelength of 475 nm. Ophthalmic devices, such as contact lenses, corneal rings, corneal inlays, keratoprostheses, and intraocular lenses, are made from such polymeric material.
摘要:
An ophthalmic composition includes a hydrophilic radiation-absorbing material, which includes a radiation-absorbing moiety coupled with a hydrophilic moiety. An ophthalmic device immersed in such a composition can obtain a radiation-absorbing property and provide protection to the wearer against such radiation. The ophthalmic composition can be formulated to achieve an effect selected from cleaning, sterilizing, storing, and combinations thereof.
摘要:
A polysiloxane prepolymer that is useful for forming biomedical devices has the formula: M(*Dii*PS)x*Dii*M (I) wherein: each M is independently a polymerizable ethylenically unsaturated radical; each Dii is independently a diradical residue of a diisocyanate; each PS is independently a diradical residue of a polysiloxane-diol or a polysiloxane-diamine; each * is independently —NH—CO—NH—, —NH—COO— or —OCO—NH—; and x is at least 2.
摘要:
A polysiloxane prepolymer that is useful for forming biomedical devices comprises blocks (I) and (II) and is terminated at each end with an ethylenically unsaturated radical: (*Dii*Diol*Dii*PS)x (I) (*Dii*PS)y (II) wherein: each Dii is independently a diradical residue of a diisocyanate; each Diol is independently a diradical residue of a diol having 1 to 10 carbon atoms; each PS is independently a diradical residue of a polysiloxane-containing diol or diamine; each * is independently —NH—CO—NH—, —NH—COO— or —OCO—NH—: x represents the number of blocks (I) and is at least 2, and y represents the number of blocks (II) and is at least 1.
摘要:
Provided are a novel class of fumaric- and itaconic-containing prepolymers and compositions comprising the prepolymers used in the manufacture of medical devices.