摘要:
The present invention relates to a heat-curable composition comprising at least one epoxy monomer comprising two or three epoxy groups, which is not a hydrolysis-polymerizable silicon compound, at least one epoxy compound bearing at least one silicon atom having at least one hydrolyzable group directly linked to the silicon atom and at least one epoxy group, and at least one epoxy ring-opening catalyst. The composition comprises at least 50% by weight of compounds having at least one epoxy group, relative to the total weight of polymerizable compounds present in the composition and provides upon pre-curing a tack-free coating that can be removed by treatment with a solution of sodium hydroxide, and upon post-curing a coating that cannot be removed by treatment with a solution of sodium hydroxide.
摘要:
The present invention is drawn to a method for manufacturing antistatic UV-cured hard-coatings on optical articles, comprising (a) coating an organic or mineral optical substrate with an essentially anhydrous solution containing from 20% to 90% by weight, relative to the total dry matter of the solution, of at least one non hydrolyzed epoxyalkyltrialkoxysilane and at least 3.2% by weight, relative to the total dry matter of the solution, of at least one photoinitiator selected from the group consisting of triarylsulfonium salts, diaryliodonium salts, and mixtures thereof, (b) curing the resulting coating by irradiation with UV-radiation, said method not comprising any hydrolysis step before the UV curing step.
摘要:
The present invention proposes a polymer composition of manufacturing ophthalmic lens by polymerization of polymerizable composition wherein the shrinkage phenomenon is minimized. The polymerizable composition comprised two different categories of monomers which are able during crosslinking to control and limit said chemical shrinkage. The present invention comprises also ophthalmic lens obtained from said polymer composition using a manufacturing process of casting or additive manufacturing.
摘要:
Disclosed are UV curable adhesive compositions and methods to adhere polycarbonate substrates containing UV absorbers to glass for use in ophthalmic lenses.
摘要:
The UV-curable coating compositions disclosed herein are provided for use as coatings for plastic (organic glass) substrates, and ophthalmic lenses, in particular. The compositions may be applied by a variety of means, including spin coating and inkjet coating. The coating compositions exhibit abrasion resistance comparable to conventional thermally-cured sol-gel coatings.
摘要:
The UV-curable coating compositions disclosed herein are provided for use as coatings for plastic (organic glass) substrates, and ophthalmic lenses, in particular. The compositions may be applied by a variety of means, including spin coating and inkjet coating. The coating compositions exhibit abrasion resistance comparable to conventional thermally-cured sol-gel coatings.
摘要:
An ophthalmic article and methods of manufacturing the ophthalmic article are described herein. The ophthalmic article can include a first coating and a second coating. The first coating can include an abrasion resistant coating that includes flexible materials. The abrasion resistant coating can be radiation cured. The second coating can include a sputter-applied anti-reflective (AR) coating. Such an ophthalmic article can have a Bayer value of at or between 1.25 and 2.6, between 1.25 and 2.0 or 1.25 and 1.75; and a hand steel wool value of 3 or less.
摘要:
An ophthalmic article and methods of manufacturing the ophthalmic article are described herein. The ophthalmic article can include a first coating and a second coating. The first coating can include an abrasion resistant coating that includes flexible materials. The abrasion resistant coating can be radiation cured. The second coating can include a sputter-applied anti-reflective (AR) coating. Such an ophthalmic article can have a Bayer value of at or between 1.25 and 2.6, between 1.25 and 2.0 or 1.25 and 1.75; and a hand steel wool value of 3 or less.
摘要:
Hard coating compositions and articles coated with said hard coating compositions are described. The coating compositions include at least a first layer as a hard coating to which is adhered a sputtered silicon containing layer, wherein the hard coating is formed with an unhydrolyzed alkoxysilane monomer cured cationically to increase a total amount of hydroxyl functional groups available in the first layer upon curing. The increased hydroxyl functional groups in the hard coating interact with the sputtered silicon containing layer and promote adherence between the hard coating and the sputtered silicon containing layer.