Silicone containing polymeric materials
View Patent ↗A polymeric material with a variable modulus of elasticity is described herein. The polymeric material described herein is useful for forming implantable medical devices (e.g. ophthalmic lenses, breast implants, and body augmentation devices). In addition, medical devices formed from the polymer material can be used to controllably release a therapeutic agent. Also, the polymeric material may be used to prepare topical compositions or other applications or devices where control of a mechanical property such as material modulus is important.
1. A method of forming an elastomeric article of manufacture comprising;
a. providing polymers having a general structure of formula 1, wherein the polymer comprises at least one pendent vinyl group,
wherein the sum of m and n is x, x ranges from 0 to about 12000, y ranges from 0 to about 500, and z ranges from 0 to about 500, the sum of x, y, and z is at least 1, R 1 -R 8 are each independently CH 3 , C 6 H 5 or CH═CH 2 , if m is greater than zero, at least one of R 4 or R 5 must be CH═CH 2 , and
wherein more than four of R 1 , R 2 , R 3 , R 6 , R 7 , or R 8 are CH═CH 2 ;
b. providing a cross-linker selected from a nonpolymeric cross-linker or a hydride terminated polymeric cross-linker;
c. providing a catalyst;
d. combining said polymer, said cross-linker and said catalyst to form a polymeric mixture; and
e. curing said polymeric mixture;
wherein at least a portion of said elastomeric article of manufacture is formed.
2. The method according to claim 1 , wherein said article of manufacture is selected from the group consisting of intraocular lenses, contact lenses, ocular lenses, body augmentation implants, medical device coatings and breast implants.
3. The method according to claim 1 , wherein said article of manufacture is capable of controlled release of a therapeutic agent.
4. The method according to claim 1 , wherein the cross-linker is selected from the group consisting of phenyltris(dimethylsiloxy)silane, 1,1,3,3,-tetraisopropyldisiloxane, 1,1,3,3,-tetramethyldisiloxane, 1,1,4,4-tetramethyldisilethane, bis(dimethylsilyl)ethane, 1,1,3,3-tetramethyldisilazane, tetrakis(dimethylsiloxy)silane, hydride-terminated polyphony-(dimethylhydrosiloxy)siloxane, hydride terminated polydimethylsiloxane, and hydride terminated methylhydrosiloxane-phenylmethylsiloxane copolymer.
5. The method according to claim 1 , wherein said polymer is hexavinyl terminated.