Monomer composition for contact lenses, polymer for contact lenses and method for producing same, and contact lens and method for producing the same
Provided is a monomer composition for contact lenses, which uses a polysiloxane monomer to produce a polymer that shows satisfactory surface hydrophilicity and oxygen permeability, and that is excellent in modulus and elongation at break. It has been found that a monomer composition containing a phosphorylcholine group-containing polysiloxane monomer, a monovinyl ether monomer, and the like can achieve the above-mentioned object.
1. A monomer composition for contact lenses, comprising the following components:
(A) a phosphorylcholine group-containing polysiloxane monomer represented by the following formula (1);
(B) a phosphorylcholine group-containing methacrylic monomer represented by the following formula (2);
(C) a trimethylsiloxysilyl group-containing silicone monomer having at least one or more hydroxy groups in a molecule;
(D) a monovinyl ether monomer having at least one or more hydroxy groups in a molecule;
(E) one or more kinds of hydroxy group-containing monomers selected from: hydroxyethyl (meth)acrylate; hydroxypropyl (meth)acrylate; hydroxybutyl (meth)acrylate; and hydroxyethylacrylamide;
(F) a crosslinker; and
(G) a monomer other than the components (A) to (F),
wherein, with respect to 100 mass % in total of all monomer components in the composition, a content ratio of the component (A) is from 10 mass % to 50 mass %, a content ratio of the component (B) is from 5 mass % to 20 mass %, a content ratio of the component (C) is from 5 mass % to 40 mass %, a content ratio of the component (D) is from 5 mass % to 40 mass %, a content ratio of the component (E) is from 5 mass % to 30 mass %, a content ratio of the component (F) is from 0.1 mass % to 15 mass %, and a content ratio of the component (G) is from 0 mass % to 50 mass %:
in the formula (1), “a” represents an integer of from 20 to 500, “b” represents an integer of from 1 to 70, “c” represents 0 or 1, “p” and “q” each represent 0 or 1, and X represents —CH 2 — or —CH 2 CH 2 —,
2. The monomer composition for contact lenses according to claim 1 , further comprising a component (H) a solvent having a hydroxy group, wherein a content ratio of the component (H) is 30 parts by mass or less with respect to 100 parts by mass in total of all monomer components in the composition.
3. A polymer for contact lenses, comprising a polymer of the monomer composition for contact lenses of claim 1 .
4. A contact lens, comprising a hydrate of the polymer for contact lenses of claim 3 .
5. A method of producing a polymer for contact lenses, including a step of polymerizing the following monomer composition:
a composition including the following components:
(A) a phosphorylcholine group-containing polysiloxane monomer represented by the following formula (1);
(B) a phosphorylcholine group-containing methacrylic monomer represented by the following formula (2);
(C) a trimethylsiloxysilyl group-containing silicone monomer having at least one or more hydroxy groups in a molecule;
(D) a monovinyl ether monomer having at least one or more hydroxy groups in a molecule;
(E) one or more kinds of hydroxy group-containing monomers selected from: hydroxyethyl (meth)acrylate; hydroxypropyl (meth)acrylate; hydroxybutyl (meth)acrylate; and hydroxyethylacrylamide;
(F) a crosslinker; and
(G) a monomer other than the components (A) to (F),
wherein, with respect to 100 mass % in total of all monomer components in the composition, a content ratio of the component (A) is from 10 mass % to 50 mass %, a content ratio of the component (B) is from 5 mass % to 20 mass %, a content ratio of the component (C) is from 5 mass % to 40 mass %, a content ratio of the component (D) is from 5 mass % to 40 mass %, a content ratio of the component (E) is from 5 mass % to 30 mass %, a content ratio of the component (F) is from 0.1 mass % to 15 mass %, and a content ratio of the component (G) is from 0 mass % to 50 mass %:
in the formula (1), “a” represents an integer of from 20 to 500, “b” represents an integer of from 1 to 70, “c” represents 0 or 1, “p” and “q” each represent 0 or 1, and X represents —CH 2 — or —CH 2 CH 2 —,
6. The method of producing a polymer for contact lenses according to claim 5 , the composition further including a component (H) a solvent having a hydroxy group, wherein a content ratio of the component (H) is 30 parts by mass or less with respect to 100 parts by mass in total of all monomer components in the composition.