Thermoset material based on antiplasticizing polythiourethane and ophthalmic lens comprising an antiplasticized thermoset material
AssigneeEssilor International
InventorsNicolas Droger, Jean-Louis Halary, Gilles Richard, Martin Rickwood
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Abstract
The invention relates to a thermoset plastic material, comprising a three-dimensional matrix containing sulphur atoms and at least one anti-plasticizing additive which is unreactive toward said matrix.
Claims39
A thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix, wherein the three-dimensional matrix is a polythiourethane matrix or a polyepisulfide matrix, and wherein the antiplasticizing additive is a dialkyl sulfide, diaryl sulfide, dialkylaryl sulfide, alkylaryl sulfide, arylalkyl aryl sulfide, aryl alkylsilane sulfide, S-arylthioalkylate, bis-arylthioalkyl, a compound containing a thiourea group, a compound containing one urethane group, or a compound containing a carbonyl group of formula:
- wherein R1 and R2 are independently an alkyl radical, a cycloalkyl radical, an aryl radical, an arylalkyl radical, or a radical of formula:
- wherein R is an alkyl radical or a trialkyl radical.
A thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix, wherein the antiplasticizing additive comprises a sulfide of formula:
- R1—S—R2
- wherein R1 and R2 are independently an alkyl radical, a cycloalkyl radical, an aryl radical;
- an arylalkyl radical, a radical:
- wherein R is an alkyl radical, or a trialkyl silane radical.
A thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix, wherein the antiplasticizing additive is a thiourea compound of formula:
- wherein R3 and R4 are independently an alkyl radical, a cycloalkyl radical, an alkyl radical bearing a nitrogen and/or an oxygen heterocycle.
A thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix, wherein the antiplasticizing additive is a urethane compound of formula:
- wherein R5 and R6 are independently a cycloalkyl group, a cycloalkyl alkyl group, an aryl group, or an arylalkyl group.
A thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix, wherein the antiplasticizing additive is dioctyl sulfide, benzyl and phenyl sulfide, dibenzyl sulfide, 4-(p-tolylthio)benzophenone, bis(phenylthio)methane, S-phenylthiopropionate, phenylthiomethyltrimethyl silane, 1-cyclohexyl-3-(2-morpholinoethyl)-2-thiourea, phenylpropyl-phenylmethane, cyclohexyl-cyclohexyl (thiodiethane di-S-thiourethane), or phenyl-phenyl (thiodiethane di-S-thiourethane).
A thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix, wherein the antiplasticizing additive has one of the formulae:
- wherein R is H, an alkyl group, or an aryl group.
An ophthalmic lens comprising an optically transparent, thermoset plastic material, comprising a three-dimensional polymer matrix, the loss modulus (E″) of which presents a secondary glass transition (β), and at least one antiplasticizing additive.
A method of making an ophthalmic lens comprising:
- obtaining a thermoset plastic material comprising a three-dimensional matrix containing sulphur atoms and at least one antiplasticizing additive that does not react with said matrix;
- and
- using the material to form a lens.
Dependencies are inferred from the claim text.