Ppg Industries Ohio, Inc.

Marvin Jerome Graham

Nina Vassileva Bojkova

Robert A Smith

Robert D Herold

Michael O Okoroafor

Matthew J Kryger

Gregory J McCollum

Hongying Zhou

Chandra B Rao

Federico Menta

William H Retsch, Jr

Charles R Hickenboth

Suresh G Sawant

William H McDonald

Phillip C Yu

Vidhu J Nagpal

William H Retsch

Rifat Tabakovic

Nina V Bojkova

Nina Bojkova

Zhou Hongying

Chandra Bhushan Rao

William H Mcdonald

Provided is a method of preparing a transparent, non-elastomeric optical article including (1) combining to form a reaction mixture free of urethanation catalysts (a) a polyisocyanate component; and (b) an active hydrogen component of polyol and/or polythiol, and at least one compound containing both amine and hydroxyl functional groups; (2) allowing the polyisocyanate component to react with amine functional groups in the active hydrogen component to form an intermediate product including a polyurea prepolymer having hydroxyl functional groups in admixture with the polyol and/or polythiol and, optionally, the compound containing both amine and hydroxyl functional groups; (3) mixing the intermediate product with additional polyisocyanates and optionally a urethanation catalyst to form a second reaction mixture; (4) introducing the second reaction mixture to a mold to form a thermoset polymerizate; and (5) releasing the polymerizate from the mold. Optical films and articles prepared by the method also are provided.

Methods for preparing optical articles and optical articles prepared therefrom

Provided is a transparent, non-elastomeric optical article prepared by (1) combining to form a reaction mixture (a) a polyisocyanate component; and (b) an active hydrogen component including (b1) a first component free of amino groups including at least one first polyol; and (b2) a second component containing (i) a second polyol and/or a polythiol and (ii) a compound containing both amine and hydroxyl functional groups; (2) introducing the reaction mixture to a mold at a temperature and for a time sufficient to form a thermoset polymerizate; and (3) releasing the polymerizate from the mold to yield a transparent, non-elastomeric optical article. Also provided is a method for preparing a transparent optical film. Optical films and articles prepared by the methods also are provided.

Optical articles and methods for preparation of same

A composition for the preparation of a transparent, non-elastomeric optical article is provided, the composition including: Multi-step and one-pot methods of preparing a cured, non-elastomeric polyurethane-containing optical article are also provided.

Polyurethane urea-containing compositions and optical articles and methods for preparing them

Provided is a polymerizable composition including (meth)acrylate monomers having at least two sulfide (&#x2014;S&#x2014;) linkages in the monomer. The polymerizable compositions include a first (meth)acrylate monomer represented by the following Formula (I), where Lis selected from a multivalent optionally substituted hydrocarbyl group optionally interrupted with at least one of &#x2014;C(O)&#x2014;, &#x2014;S&#x2014;, &#x2014;O&#x2014; and combinations thereof, and a divalent linking group represented by the following Formula (A).  In Formula (A), Y is O or S. Also in Formula (I), Lis independently for each n a divalent optionally substituted hydrocarbyl group optionally interrupted with at least one of &#x2014;O&#x2014; and &#x2014;S&#x2014;, Ris independently selected for each n from hydrogen and methyl, and n is from 2 to 6. The polymerizable compositions also may include a polymerization moderator. Also provided are polymerizates including photochromic articles and optical elements prepared from such polymerizable compositions.

Polymerizable compositions containing (meth)acrylate monomers having sulfide linkages

The present invention provides polythiol oligomer formed by the reaction of at least two or more different dienes and at least one or more dithiol wherein stoichiometric ratio of the sum of the number of equivalents of all polythiols to the sum of the number of equivalents of all dienes used to form the polythiol oligomer is greater than 1.0:1.0; and wherein the two or more different dienes comprise

Sulfur-containing oligomers and high index polyurethanes prepared therefrom

The present invention is directed to a novel polymerizable organic composition comprising one or more radically polymerizable monomers with at least one radically polymerizable monomer having at least two (meth)acryloyl groups that have backbone linkages selected from thiourethane linkages, dithiourethane linkages, combinations of thiourethane linkages and dithiourethane linkages. The present invention is also directed to polymerizates prepared from the polymerizable organic composition, shaped articles prepared from the polymerizable compositions, and photochromic articles that may be prepared from the polymerizable organic composition of the present invention.

Optical resin composition

The present invention is directed to a novel method of preparing a polymerizate, which includes the step of polymerizing a two-component composition, which includes: a first component containing at least one polycyanate reactant having at least two functional groups selected from isocyanate, isothiocyanate and combinations thereof, the polycyanate reactant being the reaction product of: a polythiol monomer having at least two thiol groups; and a polycyanate monomer having at least two functional groups selected from isocyanate, isothiocyanate and combinations thereof; and a second component containing at least one polyamine reactant having at least two functional groups selected from primary amine, secondary amine and combinations thereof. The molar equivalent ratio of (NCO+NCS) groups from the first component to (&#x2014;NH+&#x2014;NH&#x2014;) groups from the second component is from 0.5 to 100. The present invention is also directed to polymerizates prepared according to the method of the present invention. The present invention is further directed to photochromic articles that may be prepared from the polymerizates of the present invention.

Method of preparing an optical polymerizate

Describes novel polyfunctional thiiranes. Also described are polymerizable compositions comprising such novel polyfunctional thiiranes, and polymerizates, e.g., optical lenses, prepared therefrom. The described polymerizates may have a refractive index of at least 1.6, and an Abbe number of at least 27.

Polyfunctional thiirane compounds

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Monroeville, PA, United States of America

Marvin Jerome Graham