Uncrosslinked hydrogel, process for its preparation and its uses

Details Uncrosslinked hydrogel, process for its preparation and its uses Uncrosslinked hydrogel, process for its preparation and its uses

1990-11-21

1993-12-28

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Implant or insert

424428, 424429, 604294, 623 4, 623 5, 623 6, 528495, A61L 2700, B29D 1100

Patent

active

052737500

ABSTRACT:
The invention relates to an uncrosslinked hydrogel, its process of preparon as well as its uses as an article for medical and/or surgical purposes such as tubes, filaments, films, joints, implants and the like, especially in ophthalmology. The uncrosslinked hydrogel has a relatively high water content and is constituted from a liquid starting composition which comprises 2 to 50% of a copolymer of acrylonitrile and an olefinically unsaturated comonomer bearing aninic groups, possible salified, the molar ratio arcylonitrile-comonomer being comprised between 90:10 and 100:0, a suitable solvent and a suitable non-solvent of said copolymer. The ratio solvent
on-solvent is comprised between 500:1 and 0.5:1 by weight, said hydrogel having a microporous structure, an ionic capacity comprised between 0 and 500 mEq/kg of gel, a hydric content compressed between 50 and 98% and having an aptitude for permanent deformation under stress, even at a temperature below 40.degree. C.

REFERENCES:
patent: 3260707 (1966-07-01), Caldwell et al.
patent: 3873143 (1969-10-01), Tanaka
patent: 4173606 (1979-11-01), Stoy et al.
patent: 4228056 (1980-10-01), Stoy et al.
patent: 4631188 (1986-12-01), Stoy et al.
patent: 4640965 (1987-02-01), Falcetta et al.
patent: 4731079 (1988-03-01), Stoy et al.
patent: 4808182 (1989-02-01), Barrett

Affiliated with

Also associated with

Rating

Uncrosslinked hydrogel, process for its preparation and its uses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Uncrosslinked hydrogel, process for its preparation and its uses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Uncrosslinked hydrogel, process for its preparation and its uses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1541263