Oxygen permeable soft contact lens material

• US 4,649,184 A
• Filed: 12/09/1985
• Issued: 03/10/1987
• Est. Priority Date: 12/10/1984
• Status: Expired due to Term

• Current Assignee: Menicon Company Limited
• Original Assignee: Toyo Contact Lens Co., Ltd. (Menicon Company Limited)
• Inventors: Shibata, Takanori, Yoshikawa, Toshiharu
• Primary Examiner(s): Marquis, Melvyn I.
• Application Number:
  US06/806,864
• Time in Patent Office: 456 Days
• Field of Search: 528/32, 526/279, 351/160 H
• US Class Current: 526/279
• CPC Class Codes: C08F 290/148 Polysiloxanes
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08F 8/42 Introducing metal atoms or metal-containing groups
• CPC Class Codes: C08L 51/085 on to polysiloxanes
• CPC Class Codes: G02B 1/043 Contact lenses

Abstract

An oxygen permeable soft contact lens material having an improved oxygen permeability, improved softness and transparency prepared by copolymerizing a mixture comprising

(a) a polyorganoxiloxane having polymerizable groups containing an unsaturated bond and hydrophilic groups containing a hydroxyl group in the molecular side chains, each of said side chains having a polymerizable group and a hydrogroup, and

(b) a monomer having silylated hydroxyl groups as main components, and subjecting the resulting copolymer to desilylation.

Claims

1. An oxygen permeable soft contact lens material prepared by copolymerizing a mixture comprising (a) a polyorganosiloxane (A) having in its molecular side chains polymerizable groups containing an unsaturated bond and hydrophilic groups containing a hydroxyl group, each of said chains having one said polymerizable group and one said hydrophilic group, and (b) a monomer having a silylated hydroxyl groups as main components, and subjecting the resulting copolymer to desilylation.

2. The contact lens material of claim 1, wherein each of said polymerizable groups in the molecular side chains of said polyorganosiloxane (A) is present through a hydrophilic group-containing portion formed by reaction of a polyorganosiloxane (B) having epoxy groups in its molecular side chains and a compound having a polymerizable unsaturated group.

3. The contact lens material of claim 1, wherein the ratio of said polyorganosiloxane (A) to said silylated monomer having hydroxyl group is from 95/5 to 50/50 by weight.

4. The contact lens material of claim 1, wherein the ratio of said polyorganosiloxane (A) to said silylated monomer having hydroxyl group is from 90/10 to 70/30 by weight.

5. The contact lens material of claim 1, wherein a hydrophobic monomer having an aromatic ring is contained at most 25% by weight in said copolymer of the polyorganosiloxane (A) and the silylated monomer having hydroxyl group, and the ratio of said monomer having silylated hydroxyl group to said hydrophobic monomer having an aromatic ring is from 1/1 to 3/1 by weight.