Polysiloxane shaped article for use in biomedical applications

Details Polysiloxane shaped article for use in biomedical applications Polysiloxane shaped article for use in biomedical applications

1978-12-05

1980-02-19

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

433201, 3 14, 3 1, 3 36, 32 1, 128130, 128348, 128349R, 128350R, 128DIG21, 128260, 351160H, 526279, 528 12, 528 27, 528 32, 528 33, 528 24, 528 37, 528 42, C08G 7704

Patent

active

041895460

ABSTRACT:
Monomeric polysiloxanes end-capped with activated unsaturated groups and polymers and copolymers thereof are disclosed herein for use as contact lenses and biomedical devices with improved properties, such as, oxygen transportability, hydrolytic stability, biological inertness, transparency and improved strength without the use of fillers. The polymer composition comprises a poly(organosiloxane) monomer .alpha.,.omega. terminally bonded through divalent hydrocarbon groups to polymerized free radical polymerizably activated unsaturated groups. Contact lenses and biomedical devices i.e. shaped article for use in biomedical applications made therefrom can be "hard" or "soft". This hardness or softness is a function of the comonomer or the molecular weight of the monomers. Preferably the contact lenses and biomedical devices are "soft".
The copolymer compositions of the instant invention comprise the polymerization product of the polysiloxane monomers and monomer or monomers containing an activated vinyl group. These polymers are employed to make biomedical devices and optical products, e.g. contact lenses, intraocular implants, etc.

REFERENCES:
patent: 3996187 (1976-12-01), Travnicek
patent: 3996189 (1976-12-01), Travnicek
patent: 4136250 (1970-01-01), Mueller et al.
patent: 4153641 (1979-05-01), Deichert et al.

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