Monomeric units useful for reducing the modulus of low water...

C - Chemistry – Metallurgy – 07 – F

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07F 7/08 (2006.01) C08G 77/24 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)

Patent

CA 2239902

Monomeric units useful in reducing the modulus of low water polymeric silicone compositions are disclosed. Low water compositions including the subject monomeric units are especially useful in the formation of biomedical articles such as low water silicone contact lenses. In formula (I), A is an activated unsaturated group; R and D independently are alkyl, alkylene or haloalkyl groups having 1 to 10 carbon atoms wherein said carbon atoms may include ether linkages therebetween; M is hydrogen, fluorine, or an alkyl group; R1, R2, R3 and R4 are independently selected from: alkyl or haloalkyl groups wherein ether linkages may be included between carbon atoms; siloxane groups; and carbocyclic ring groups having from 6 to 18 carbon atoms; m is an integer from 1 to 500; n is an integer from 1 to 20; x and y are 0 or 1; z is 1 or 2; and x + y + z = 3; so long as at least one of R1 or R2 is an alkyl group having from 1 to 10 carbon atoms.

Unités monomères utiles pour réduire le module de compositions de silicone polymères à faible teneur en eau. Des compositions à faible teneur en eau comportant les unités monomères de la présente invention sont particulièrement utiles dans la formation d'articles biomédicaux tels que des lentilles de contacts en silicone à faible teneur en eau. Dans la formule (I), A est un groupe insaturé activé; R et D sont indépendamment des groupes alkyle, alkylène ou haloalkyle ayant de 1 à 10 atomes de carbone, lesdits atomes de carbones pouvant inclure des liaisons éther entre eux; M est hydrogène, fluor, ou un groupe alkyle; R¿1?, R¿2?, R¿3? et R¿4? sont indépendamment choisis parmi des groupes alkyle ou haloalkyle, des liaisons éther pouvant être incluses entre des atomes de carbone, des groupes siloxane et des groupes à cycles carbocycliques ayant de 6 à 18 atomes de carbone; m est un nombre entier de 1 à 500; n est un nombre entier de 1 à 20; x et y sont 0 ou 1; z est 1 ou 2; et x + y + z = 3; à condition qu'au moins l'un parmi R¿1? et R¿2? soit un groupe alkyle ayant de 1 à 10 atomes de carbone.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Monomeric units useful for reducing the modulus of low water... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monomeric units useful for reducing the modulus of low water..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monomeric units useful for reducing the modulus of low water... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1666376

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.