Self-healing transparent polymer compositions containing conductive colloids
AssigneeEssilor International
InventorHaipeng Zheng
Life of this patent
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Abstract
Described is a thiol-ene composition that includes a resinous mixture of at least a first monomer and at least a second monomer, in which the first monomer is a polyfunctional allyl monomer and the second monomer is a polyfunctional thiol and the molar ratio of the first monomer to the second monomer is about 60:40 to about 80:20. Said composition further includes conductive colloidal particles in an amount between about 4 wt % and about 7 wt % of the total composition. When cured, a formed composition offers self-healing properties and resistance to abrasions and scratches that exceed the levels found in comparative thiol-enes that either lack the addition of the conductive colloidal particles and/or have a less effective ratio of first monomer to second monomer.
Claims18
A composition comprising:
- a thiol-ene network formed by a thiol-ene reaction with at least a first monomer and at least a second monomer in a resinous mixture, wherein the first monomer is a polyfunctional allyl monomer and the second monomer is a polyfunctional thiol, wherein a molar ratio of the first monomer to the second monomer in the resinous mixture is about 65:35 to about 73:27;
- and
- conductive colloidal particles in an amount between about 5 wt % and about 7 wt % of the thiol-ene network, wherein the conductive colloidal particles are dispersed uniformly within the thiol-ene network, forming a transparent matrix that has a glass transition temperature from about 40° C. to about 100° C.;
- wherein the composition is a thin transparent film coating on an ophthalmic lens having a thickness in a range from about 2 μm to about 50 μm;
- and
- wherein the conductive colloidal particles are selected from the group consisting of Sb2O3, P2O5, and a combination thereof.
An optical article comprising:
- a transparent substrate;
- and
- at least one transparent composition on a facing surface of the transparent substrate, wherein the transparent composition is formed by curing a resinous mixture comprising at least a polyfunctional allyl monomer and a polyfunctional thiol together with conductive colloidal particles in an amount between about 5 wt % and about 7 wt % of the transparent composition in which a molar ratio of the polyfunctional allyl monomer to the polyfunctional thiol is about 65:35 to about 73:27, and
- wherein the at least one transparent composition has a thickness in a range from about 2 μm to about 50 μm, is self-healing by at least partially or completely sealing its outer surface when subject to abrasion, and wherein the at least one transparent composition has a healing level of greater than 65% and a Hazehm, of <0.58%;
- and
- wherein the conductive colloidal particles are selected from the group consisting of Sb2O3, P2O5, and a combination thereof.
An optical article comprising:
- a transparent substrate;
- and
- at least one transparent composition on a facing surface of the transparent substrate, wherein:
- the transparent composition is formed by curing a resinous mixture comprising at least a polyfunctional allyl monomer and a polyfunctional thiol together with conductive colloidal particles selected from the group consisting of Sb2O3, P2O5, and a combination thereof, in an amount between about 5 wt % and about 7 wt % of the transparent composition in which a molar ratio of the polyfunctional allyl monomer to the polyfunctional thiol is about 65:35 to about 73:27;
- the at least one transparent composition has a thickness in a range from about 2 μm to about 50 μm, is self-healing by at least partially or completely sealing its outer surface when subject to abrasion, and wherein the at least one transparent composition has a healing level of greater than 65% and a Hazehw of <0.58%;
- and
- the polyfunctional allyl monomer is 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (TTT) and the polyfunctional thiol is pentaerythritol tetrakis(3-mercapto propionate) (PTMP).
Dependencies are inferred from the claim text.