Sulfur-containing compounds for optical grade polymeric casting compositions
AssigneeUcb, S.A.
InventorPeter Weissman
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Abstract
Polymeric compositions for the preparation of optical grade materials, and the optical materials prepared thereby, are provided. The compositions include a class of reactive and non-reactive additives, referred to as additive, in combination with a polymer and optionally a diluent. The additives are preferably the reaction product of a thiol containing compound and an unsaturated compound. The additives optimally have a refractive index between about 1.40 and 1.70, and preferably between 1.50 and 1.70; a relatively high Abbe number (between 25 and 60) and minimal color.
Claims23
A polymeric casting composition for the preparation of optical grade materials comprising:
- (a) 60-75% by weight of a di(meth)acrylate;
- (b) 5-20% by weight of a monothiol;
- and
- (c) 15-30% by weight of an aromatic compound with conjugated unsaturation.
A polymeric composition comprising a compound prepared by:
- A) reacting
- (i) a polyol selected from the group consisting of pentaerythritol, sorbitol, mannitol, glycol, alkylene glycol, polyalkylene glycol, trimethylolalkane, dipentaerythritol, cyclohexane-1,2,4-trimethanol, tripentaerythritol, hexahydroxycyclohexane, pentahydroxycyclopentane, trihydroxycycloheptane, glycerine, benzene-1,2,4,5-tetramethanolpentaerythritol, or a mixture thereof, with
- (ii) a thioaliphatic carboxylic acid;
- and
- B) reacting the product of step A with a monomer selected from the group consisting of 3-methyl-3-butene-1-ol, methacrylic acid, acrylic acid, alkyl acrylate, alkyl methacrylate, 2-hydroxypropyl(meth)acrylate, 2-hydroxyethyl (meth)acrylate, unsaturated cycloaliphatic epoxy compounds, allyl alcohol, CH2═CHC6H4C(CH3)2NCO, octyldecylacrylate, 2,4,6-tribromophenyl (meth)acrylate, and 2-(2,4,6-tribromophenoxy)ethyl ester of 2-propenoic acid;
- and a polymer, monomer, or oligomer.
A polymeric composition comprising noncrosslinked compound, prepared by:
- (A) reacting a polyol with a thioaliphatic carboxylic acid to produce product A:
- (B) reacting product A with a compound that contains one unsaturated bond capable of reacting with a thiol, in such a fashion that approximately 1 or 2 free thiol groups remain in the product;
- and then
- (C) reacting the product of step B with a diacrylate or dimethacrylate in such a fashion that all of the remaining thio groups are reacted;
- and
- a polymer, monomer or oligomer.
Dependencies are inferred from the claim text.