Patent EA-000365-B1 (EA)
Title: Adhesive photochromatic matrix layers for use in optical articles
Inventor: GUPTA AMITIVA
IPC: B29D11/00
Filed: 1996-05-06
Abstract: 1. An optical product comprising an adhesive matrix layer attached to an optical substrate, said adhesive matrix layer having a cross-link density of less than about 3 mols/1 and a Tg- between 10 and 60 degree C, and said adhesive matrix layer containing one or more photochromic additives. 2. The optical product of Claim l further comprising an outer barrier layer attached to said adhesive matrix layer, said outer barrier layer being substantially impermeable to said one or more photochromic additives. 3. An optical product comprising: an optical substrate; an adhesive matrix layer containing one or more photochromic additives, said adhesive matrix layer attached to said optical substrate and having a cross-link density of less than about 3 mols/1 and a Tg between 10 and 60 degree C; and an outer barrier layer attached to said adhesive photochromic matrix layer, said outer barrier layer being attached without the use of an additional adhesive. 4. The optical product of Claim 1, wherein said adhesive photochromic matrix layer is provided on a surface of said optical substrate selected from the group consisting of a convex surface of said optical substrate, a concave surface of said optical substrate, and both convex and concave surfaces of said optical substrate. 5. The optical product of Claim 1, wherein said optical substrate is selected from the group consisting of an optical preform, an optical window, an optical wafer, an optical lens, and a semi-finished lens blank. 6. The optical product of Claim 1, wherein said adhesive matrix layer has a refractive index that is within 0.05 refractive index units of the refractive index of said substrate. 7. The optical product of Claim 1, wherein said adhesive matrix layer is resistant to solvents selected from the group consisting of organic solvents, silicone oils, fluorinated silicone oils, and fluorocarbons. 8. The optical product of Claim 1, wherein said outer barrier layer is a scratch resistant layer. 9. The optical product of Claim 1, wherein said outer barrier layer has a Tg of more than about 70 degree C. 10. The optical product of Claim 1, wherein said one or more photochromic additives are selected from the group consisting of spiro(indolino) naphthoxazines, spiro(indolino) pyridobenzoxazines, spiro(benzindolino) naphthoxazines, and spiro(benzindolino) pyridobenzoxazines. 11. The optical product of Claim 1, wherein said adhesive matrix layer comprises at least two adhesive matrix sublayers. 12. The optical product of Claim 11, wherein said each of said at least two adhesive matrix sublayers contains a different photochromic additive, differs from the photochromic additive of another sublayer. 13. The optical product of Claim 1 wherein additionally comprising a layer of photochromic material between said optical substrate and said adhesive matrix layer. 14. The optical product of Claim 3 wherein further comprising a layer of photochromic material between said optical substrate and said adhesive matrix layer. 15. The optical product of Claim 1 wherein a cross-link density is less than 2 mols/l. 16. The optical product of Claim 3 wherein a cross-link is less than 2 mol/l. 17. The optical product of Claim 1 wherein Tg is between 20 and 40 degree C. 18. The optical product of Claim 3 wherein Tg is between 20 and 40 degree C. 19. The optical product of Claim 1, wherein said adhesive matrix layer has a thickness of greater than 25 mkm. 20. The optical product of Claim 19, wherein said adhesive matrix layer has a thickness ranging from 100 to 250 mkm. 21. The optical product of Claim 1, wherein said adhesive matrix layer comprises a mixture of two or more acrylates, methacrylates, allyl derivatives or vinyl derivatives. 22. The optical product of Claim 11, wherein said adhesive matrix layer comprises a mixture of two or more acrylates, methacrylates, allyl derivatives or vinyl derivatives. 23. An adhesive matrix layer containing one or more photochromatic additives, said adhesive matrix layer having a cross-link density that is less than about 3 mols/1 and a Tg between 10 and 60 degree C. 24. The adhesive matrix layer of Claim 23, wherein said one or more photochromic additives are selected from the group consisting of spiro(indolino) naphthoxazines, spiro(indolino) pyridobenzoxazines, spiro(benzindolino) naphthoxazines, and spiro(benzindolino) pyridobenzoxazines. 25. The adhesive matrix layer of Claim 23, wherein a cross-link density is less than 2 mol/l. 26. The adhesive matrix layer of Claim 23, wherein Tg is between 20 and 40 degree C. 27. The adhesive matrix layer of Claim 23, wherein it has a thickness of greater than 25mkm. 28. The adhesive matrix layer of Claim 27, wherein it has a thickness ranging from 100 to 250 mkm. 29. The adhesive matrix layer of Claim 28, wherein comprising a mixture of two or more acrylates, methacrylates, allyl derivatives or vinyl derivatives. 30. A method for the manufacture of an optical substrate comprising providing at least on one surface of the optical substrate an adhesive matrix sublayer having a cross-link density of less than about 3 mols/1 and having a Tg between 10 and 60 degree C, wherein said adhesive matrix sublayer comprises one or more photochromic additives. 31. The method for the manufacture of an optical substrate having an attached adhesive matrix layer of Claim 30, comprising the steps of: - coating a mold with an adhesive matrix resin corresponding to said adhesive matrix layer, to form a coated mold; - arranging said coated mold, said accessory mold and said substrate resin such that the space between said coated mold and said accessory mold is filled with said substrate resin and such that the volume occupied by said substrate resin corresponds to the shape of the optical substrate; and - curing said substrate resin. 32. The method of Claim 31, wherein said mold is provided with a resin corresponding to a hard coat material prior to coating said adhesive matrix resin. 33. The method of Claim 31, wherein a photochomic additive is provided within said adhesive matrix resin prior to curing. 34 The method of Claim 31, wherein the photochromic additive is provided within said adhesive matrix layer after curing. 35. The method of Claim 31, further comprising placing a layer of photochromic layer on said mold prior to coating the mold with said adhesive matrix resin. 36. The method of Claim 32, comprising the photochomic layer is placed in the resin, corrsponding to said hard coat material prior to coating the mold with adhesive matrix resin. 37. The method for the manufacture of an optical substrate having an attached adhesive matrix layer of Claim 30, comprising the steps of: providing said optical resin on at least one surface of said substrate; and curing the adhesive matrix resin to form said adhesive matrix layer. 38. The method of Claim 30, wherein said adhesive matrix resin is provided on said at least one surface of said substrate by means of a mold. 39. The method of Claim 30, wherein said adhesive matrix resin is provided on said at least one surface of said substrate by an application step selected from the group consisting of dip coating, brushing, dripping, spraying, photolithography and spin coating said optical substrate. 40. The method of Claim 30, wherein said adhesive matrix resin is cured either concurrently with os subsequent to said application step. 41. The method of Claim 30, further comprising the steps of: immersing said optical substrate in an adhesive matrix resin bath; and curing said adhesive matrix resin on said optical substrate, while said optical substrate is immersed in said adhesive matrix resin. 42. The method of 30, wherein one or more photochromic additives selected from the group consisting of spiro(indolino) naphthoxazines, spiro(indolino) pyridobenzoxazines, spiro(benzindolino) naphthoxazines, and spiro(benzindolino) pyridobenzoxazines is incorporated into said adhesive matrix layer. 43. The method of Claim 30, wherein said additive is incorporated into said adhesive matrix layer from a solvent solution containing said one or more photochromic additives using a method selected from the group consisting of immersing, brushing dripping, spraying, flow coating and spin coating, followed by removal of residual solvent. 44. The method of Claim 30, wherein said solvent is selected from the group consisting of organic solvents, silicone oils and fluorinated oils, taken separately or in a combination. 45. The method of Claim 30, further comprising providing an outer barrier layer on said adhesive matrix layer. 46. The method of Claim 30, wherein said adhesive matrix layer is subjected to one or more dispersion processes selected from the group consisting of ageing, annealing, vibration, ultraviolet radiation and infrared radiation to further disperse said one or more photochromic additives within said adhesive matrix layer. 47. The method of Claim 37, wherein further comprising placing a layer of photochromic material on the optical substrate prior to providing said adhesive matrix resin. 48. The method of Claim 30, wherein the photochromic additives are provided by a method selected from the group of: grinding the photochromic additives together, dissolving the photochromic additives in a common solvent and evaporating the solvent, and microencapsulating the photochromic additives with a layer of polymer. 49. The method of Claim 30, wherein the matrix layer having said cross link density of less than 2 mols/1. 50. The method of Claim 30, wherein said T is between 20 and 40 degree C. 51. The method of Claim 30, wherein said adhesive matrix layer has a thickness of greater than 25 mkm. 52. The method of Claim 51, wherein said thickness of adhesive matrix layer ranges from 100 to 250 mkm. 53. The method of Claim 30, wherein said adhesive matrix layer comprises a mixture of two or more acrylates, methacrylates, allyl derivatives or vinyl derivatives. 54. A method for the manufactu