Optical contact objects

• US 4,703,097 A
• Filed: 03/30/1987
• Issued: 10/27/1987
• Est. Priority Date: 04/10/1986
• Status: Expired due to Fees

• Current Assignee: Bayer AG, Ciba-Geigy Corporation (Novartis Ag)
• Original Assignee: Bayer AG
• Inventors: Wingler, Frank, Geyer, Otto-Christian
• Primary Examiner(s): Michl, Paul R.
• Application Number:
  US07/031,855
• Time in Patent Office: 211 Days
• Field of Search: 526/279, 526/307.1, 523/107
• US Class Current: 526/279
• CPC Class Codes: C08F 230/085 the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
• CPC Class Codes: C08L 39/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 43/04 Homopolymers or copolymers of monomers containing silicon
• CPC Class Codes: G02B 1/043 Contact lenses

Abstract

The optical contact objects contain a wettable, optionally crosslinked copolymer comprising the components N-vinylcarboxamide, (meth)acrylates of a polysiloxane and, optionally, vinyl monomers.

Claims

1. Optical contact objects fabricated from wettable, optionally crosslinked copolymers of olefinically unsaturated monomers, wherein the copolymer contains as components

(A) 4 to 55 parts by weight of an N-vinylcarboxamide of the formula ##STR14## in which R¹ and R² are the same or different and denote hydrogen or lower alkyl,

(B) 96 to 30 parts by weight of a (meth)acrylate of a polysiloxane, and, optionally

(C) up to 66 parts by weight of a vinyl monomer.

2. Optical contact objects according to claim 1, wherein 5 to 15 parts by weight of the N-vinylcarboxamide are used.

3. Optical contact objects according to claims 1 and 2, wherein N-methyl-N-vinylacetamide is used as the N-vinylcarboxamide.

4. Optical contact objects according to claims 1 to 3, wherein 85 to 35 parts by weight of a (meth)acrylate of a polysiloxane are used.

5. Optical contact objects according to claims 1 to 4, wherein a (meth)acrylate of a polysiloxane of the formula ##STR15## wherein n represents a number from 1 to 4,

R¹ denotes hydrogen or methyl, and

R⁴, R⁵ and R⁶ are the same or different and denote alkoxyl, lower alkyl, cycloalkyl, aryl, trimethylsiloxyl or polysiloxane, is used.

6. Optical contact objects according to claims 1 to 4, wherein a (meth)acrylate of a polysiloxane of the formula ##STR16## wherein n and m are identical or different and each represent a number from 1 to 3, and

R³ denotes hydrogen or methyl and

R⁷ denotes lower alkyl, cycloalkyl or polysiloxane, is used.

7. Optical contact objects according to claims 1 to 4, wherein a (meth)acrylate of a polysiloxane of the formula ##STR17## wherein n represents a number from 1 to 4,

R³ denotes hydrogen or methyl,

R⁸ denotes hydrogen, lower akyl or hydroxyl,

R⁹ represents polysiloxane,

X denotes oxygen, sulphur or the radical ##STR18## wherein R⁸ has the meaning given above, and

Y represents a divalent C₂ -tp C₂₄ -alkylene, C₅ - to C₈ -alkylene, or a divalent radical having 7 to 20 carbon atoms consisting of alkylene, cycloalkylene and/or arylene groups,

is used.

8. Optical contact objects according to claims 1 to 4, wherein a (meth)acrylate of a polysiloxane of the formula ##STR19## wherein n represents a number from 1 to 6,

R³ denotes hydrogen or methyl,

R⁹ represents siloxane, and

R¹⁰ denotes hydrogen, lower alkyl or cycloalkyl, is used.

9. Optical contact objects according to claims 1 to 8, wherein 10 to 60 parts by weight of a vinyl monomer are used.

10. Optical contact objects according to claims 1 to 9, wherein an N-vinyllactam and/or a (meth)acrylic acid derivative is used as the vinyl monomer.

11. Process for the preparation of optical contact objects, wherein

(A) 4 to 55 parts by weight of an N-vinylcarboxamide of the formula ##STR20## wherein R¹ and R² are the same or different and denote hydrogen or lower alkyl,

(B) 96 to 30 parts by weight of a (meth)acrylate or (meth)acrylates of a polysiloxane, and optionally,

(C) up to 66 parts by weight of a vinyl monomer are polymerized in the presence of a radical initiator.

12. Use of wettable, optionally crosslinked copolymers containing as components

(A) 4 to 55 parts by weight of an N-vinylcarboxamide of the formula ##STR21## wherein R¹ and R² are the same or different and denote hydrogen or lower alkyl,

(B) 96 to 30 parts by weight of a (meth)acrylate or (meth)acrylates of a polysiloxane, and, optionally,

(C) up to 66 parts by weight of a vinyl monomer for optical contact objects.

13. Use according to claim 12 for contact lenses or scleral lenses.