US 6,669,873 B1 · Optical resin composition comprising thiol-ene prepolymer

Abstract

Described is a polymerizable organic composition comprising: (a) a radically polymerizable gel-free prepolymer of (i) at least one first polymerizable monomer having at least two radically polymerizable ethylenically unsaturated groups, e.g., divinyl benzene, and (ii) at least one first polythiol monomer having at least two thiol groups, e.g., thioglycerol bis(mercaptoacetate); and (b) at least one second polymerizable monomer having at least two radically polymerizable ethylenically unsaturated groups, e.g., divinyl benzene and/or methacrylic anhydride, the first and second radically polymerizable monomers each being substantially free of norbornene groups. The molar equivalent ratio of ethylenically unsaturated groups of (a)(i) to the thiol groups of (a)(ii) is no greater than 1:1. The described polymerizable composition has reduced shrinkage, and a polymerizate prepared therefrom has a refractive index of at least 1.57 and an Abbe number of at least 33.

Claims20

Dependent claims

A polymerizable organic composition comprising:

(a) a radically polymerizable prepolymer of,
(i) at least one first polymerizable monomer having at least two radically polymerizable ethylenically unsaturated groups, and
(ii) at least one first polythiol monomer having at least two thiol groups,
the molar equivalent ratio of ethylenically unsaturated groups of (a)(i) to thiol groups of (a)(ii) is no greater than 1:1, and the percent consumption of ethylenically unsaturated groups of (a)(i) is selected such that said prepolymer is a substantially gel-free liquid at 25° C.;
and
(b) at least one second polymerizable monomer having at least two radically polymerizable ethylenically unsaturated groups,
wherein a polymerizate of said polymerizable organic composition has a refractive index of at least 1.57, an Abbe number of at least 33, said polymerizable organic composition having a percent shrinkage less than that of a corresponding polymerizable composition containing substantially no prepolymer, said first and second radically polymerizable monomers each being substantially free of norbornene groups.

4 more elements

A polymerizable organic composition comprising:

(a) a radically polymerizable prepolymer of,
(i) a first polymerizable monomer selected from aromatic monomer having at least two vinyl groups, (meth)acrylic anhydride and mixtures thereof, and
(ii) at least one first polythiol monomer having at least two thiol groups,
the molar equivalent ratio of ethylenically unsaturated groups of (a)(i) to thiol groups of (a)(ii) is no greater than 1:1, and the percent consumption of ethylenically unsaturated groups of (a)(i) is selected such that said prepolymer is a substantially gel-free liquid at 25° C.;
(b) a second polymerizable monomer selected from aromatic monomer having at least two vinyl groups, (meth)acrylic anhydride and mixtures thereof;
and
(c) optionally monoethylenically unsaturated monomer,
wherein a polymerizate of said polymerizable organic composition has a refractive index of at least 1.57, an Abbe number of at least 33, and said polymerizable organic composition has a percent shrinkage less than that of a corresponding polymerizable composition containing substantially no prepolymer.

5 more elements

Dependencies are inferred from the claim text.

Optical resin composition comprising thiol-ene prepolymer

Life of this patent

Optical resin composition comprising thiol-ene prepolymer

Life of this patent

Abstract

Claims20