Material for contact lenses, method for manufacturing contact lenses and contact lenses obtained thereby

• US 9,086,528 B2
• Filed: 12/25/2014
• Issued: 07/21/2015
• Est. Priority Date: 02/07/2013
• Status: Active Grant

• Current Assignee: BENQ Materials Corporation
• Original Assignee: BENQ Materials Corporation
• Inventors: Jan, Fan-Dan
• Primary Examiner(s): Seidleck, James J
• Assistant Examiner(s): Salamon, Peter A.
• Application Number:
  US14/583,184
• Publication Number:
  US 20150111983A1
• Time in Patent Office: 208 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: C08F 230/08 containing silicon
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/26 nitrogen-containing groups
• CPC Class Codes: C08G 77/388 containing nitrogen
• CPC Class Codes: C08L 101/14 the macromolecular compounds being water soluble or water swellable, e.g. aqueous gels
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
• CPC Class Codes: G02B 1/043 Contact lenses

Abstract

The method for manufacturing contact lenses includes the following steps. First, a first siloxane macromer, a second siloxane macromer, at least one hydrophilic monomer, an initiator and a solvent are mixed to form a mixture. Then the mixture is injected into a mold of contact lens and conducted by a thermal treatment or a UV irradiating treatment to form contact lenses. The number average molecular weight of the first siloxane macromer represented by the following formula (I), is 1,000 to 10,000 and the first siloxane macromer has a cross-linking function.

The second siloxane macromer is selected from the group consisting of a siloxane macromer represented by the following formula (II) and a siloxane macromer represented by the following formula (III).

Wherein in formula (II), p is an integer of 4 to 80, and in formula (III), q is an integer of 4 to 80 and r is an integer of 3 to 40.

Claims

1. A method for manufacturing contact lenses comprising:

(a) mixing a first siloxane macromer represented by the following formula (I), a second siloxane macromer represented by the following formula (II), at least one hydrophilic monomer, an initiator and a solvent to form a mixture; and

(b) injecting the mixture into a mold of contact lens and conducting a thermal treatment or a UV irradiating treatment to the mixture to form contact lenses;

wherein the number average molecular weight of the first siloxane macromer of formula (I) is 1,000 to 10,000 and the first siloxane macromer has a cross-linking function;

2. A method for manufacturing contact lenses according to claim 1, wherein the first siloxane macromer is present at an amount of 5 to 35 parts by weight, the second siloxane macromer of is present at an amount of 30 to 50 parts by weight, the hydrophilic monomer is present at an amount of 5 to 60 parts by weight, and the initiator is present at an amount of 0.5 to 0.7 parts by weight based on the total amount of the composition.

3. A method for manufacturing contact lenses according to claim 1, wherein the first siloxane macromer comprises a siloxane macromer represented by the following formula (IV) or a siloxane macromer represented by the following formula (V):

4. A method for manufacturing contact lenses according to claim 1, wherein the hydrophilic monomer is a combination of HEMA and NVP, a combination of HEMA and DMA, a combination of NVP and DMA or a combination of a NVP, HEMA and DMA.

5. A method for manufacturing contact lenses according to claim 1, wherein the mixture further includes a crosslinking agent.

6. A method for manufacturing contact lenses according to claim 5, wherein the first siloxane macromer is present at an amount of 5 to 35 parts by weight, the second siloxane macromer is present at an amount of 30 to 50 parts by weight, the hydrophilic monomer is present at an amount of 5 to 50 parts by weight, the initiator is present at an amount of 0.5 to 0.7 parts by weight and the crosslinking agent is present at an amount of 0.1 to 5 parts by weight based on the total amount of the composition.

7. A contact lens, which is obtained by the method for manufacturing contact lenses according to claim 1.